-int PNGAPI png_mmx_support(void);
-
-#ifdef PNG_USE_LOCAL_ARRAYS
-static const int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0};
-static const int FARDATA png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
-static const int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1};
-#endif
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-/* djgpp, Win32, and Cygwin add their own underscores to global variables,
- * so define them without: */
-#if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__)
-# define _mmx_supported mmx_supported
-# define _const4 const4
-# define _const6 const6
-# define _mask8_0 mask8_0
-# define _mask16_1 mask16_1
-# define _mask16_0 mask16_0
-# define _mask24_2 mask24_2
-# define _mask24_1 mask24_1
-# define _mask24_0 mask24_0
-# define _mask32_3 mask32_3
-# define _mask32_2 mask32_2
-# define _mask32_1 mask32_1
-# define _mask32_0 mask32_0
-# define _mask48_5 mask48_5
-# define _mask48_4 mask48_4
-# define _mask48_3 mask48_3
-# define _mask48_2 mask48_2
-# define _mask48_1 mask48_1
-# define _mask48_0 mask48_0
-# define _LBCarryMask LBCarryMask
-# define _HBClearMask HBClearMask
-# define _ActiveMask ActiveMask
-# define _ActiveMask2 ActiveMask2
-# define _ActiveMaskEnd ActiveMaskEnd
-# define _ShiftBpp ShiftBpp
-# define _ShiftRem ShiftRem
-#ifdef PNG_THREAD_UNSAFE_OK
-# define _unmask unmask
-# define _FullLength FullLength
-# define _MMXLength MMXLength
-# define _dif dif
-# define _patemp patemp
-# define _pbtemp pbtemp
-# define _pctemp pctemp
-#endif
-#endif
-
-
-/* These constants are used in the inlined MMX assembly code.
- Ignore gcc's "At top level: defined but not used" warnings. */
-
-/* GRR 20000706: originally _unmask was needed only when compiling with -fPIC,
- * since that case uses the %ebx register for indexing the Global Offset Table
- * and there were no other registers available. But gcc 2.95 and later emit
- * "more than 10 operands in `asm'" errors when %ebx is used to preload unmask
- * in the non-PIC case, so we'll just use the global unconditionally now.
- */
-#ifdef PNG_THREAD_UNSAFE_OK
-static int _unmask;
-#endif
-
-static unsigned long long _mask8_0 = 0x0102040810204080LL;
-
-static unsigned long long _mask16_1 = 0x0101020204040808LL;
-static unsigned long long _mask16_0 = 0x1010202040408080LL;
-
-static unsigned long long _mask24_2 = 0x0101010202020404LL;
-static unsigned long long _mask24_1 = 0x0408080810101020LL;
-static unsigned long long _mask24_0 = 0x2020404040808080LL;
-
-static unsigned long long _mask32_3 = 0x0101010102020202LL;
-static unsigned long long _mask32_2 = 0x0404040408080808LL;
-static unsigned long long _mask32_1 = 0x1010101020202020LL;
-static unsigned long long _mask32_0 = 0x4040404080808080LL;
-
-static unsigned long long _mask48_5 = 0x0101010101010202LL;
-static unsigned long long _mask48_4 = 0x0202020204040404LL;
-static unsigned long long _mask48_3 = 0x0404080808080808LL;
-static unsigned long long _mask48_2 = 0x1010101010102020LL;
-static unsigned long long _mask48_1 = 0x2020202040404040LL;
-static unsigned long long _mask48_0 = 0x4040808080808080LL;
-
-static unsigned long long _const4 = 0x0000000000FFFFFFLL;
-/* static unsigned long long _const5 = 0x000000FFFFFF0000LL; */ /* NOT USED */
-static unsigned long long _const6 = 0x00000000000000FFLL;
-
-/* These are used in the row-filter routines and should/would be local */
-/* variables if not for gcc addressing limitations. */
-/* WARNING: Their presence probably defeats the thread safety of libpng. */
-
-#ifdef PNG_THREAD_UNSAFE_OK
-static png_uint_32 _FullLength;
-static png_uint_32 _MMXLength;
-static int _dif;
-static int _patemp; /* temp variables for Paeth routine */
-static int _pbtemp;
-static int _pctemp;
-#endif
-
-void /* PRIVATE */
-png_squelch_warnings(void)
-{
-#ifdef PNG_THREAD_UNSAFE_OK
- _dif = _dif;
- _patemp = _patemp;
- _pbtemp = _pbtemp;
- _pctemp = _pctemp;
- _MMXLength = _MMXLength;
-#endif
- _const4 = _const4;
- _const6 = _const6;
- _mask8_0 = _mask8_0;
- _mask16_1 = _mask16_1;
- _mask16_0 = _mask16_0;
- _mask24_2 = _mask24_2;
- _mask24_1 = _mask24_1;
- _mask24_0 = _mask24_0;
- _mask32_3 = _mask32_3;
- _mask32_2 = _mask32_2;
- _mask32_1 = _mask32_1;
- _mask32_0 = _mask32_0;
- _mask48_5 = _mask48_5;
- _mask48_4 = _mask48_4;
- _mask48_3 = _mask48_3;
- _mask48_2 = _mask48_2;
- _mask48_1 = _mask48_1;
- _mask48_0 = _mask48_0;
-}
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-
-static int _mmx_supported = 2;
-
-/*===========================================================================*/
-/* */
-/* P N G _ C O M B I N E _ R O W */
-/* */
-/*===========================================================================*/
-
-#if defined(PNG_HAVE_ASSEMBLER_COMBINE_ROW)
-
-#define BPP2 2
-#define BPP3 3 /* bytes per pixel (a.k.a. pixel_bytes) */
-#define BPP4 4
-#define BPP6 6 /* (defined only to help avoid cut-and-paste errors) */
-#define BPP8 8
-
-/* Combines the row recently read in with the previous row.
- This routine takes care of alpha and transparency if requested.
- This routine also handles the two methods of progressive display
- of interlaced images, depending on the mask value.
- The mask value describes which pixels are to be combined with
- the row. The pattern always repeats every 8 pixels, so just 8
- bits are needed. A one indicates the pixel is to be combined; a
- zero indicates the pixel is to be skipped. This is in addition
- to any alpha or transparency value associated with the pixel.
- If you want all pixels to be combined, pass 0xff (255) in mask. */
-
-/* Use this routine for the x86 platform - it uses a faster MMX routine
- if the machine supports MMX. */
-
-void /* PRIVATE */
-png_combine_row(png_structp png_ptr, png_bytep row, int mask)
-{
- png_debug(1, "in png_combine_row (pnggccrd.c)\n");
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- if (_mmx_supported == 2) {
-#if !defined(PNG_1_0_X)
- /* this should have happened in png_init_mmx_flags() already */
- png_warning(png_ptr, "asm_flags may not have been initialized");
-#endif
- png_mmx_support();
- }
-#endif
-
- if (mask == 0xff)
- {
- png_debug(2,"mask == 0xff: doing single png_memcpy()\n");
- png_memcpy(row, png_ptr->row_buf + 1,
- (png_size_t)PNG_ROWBYTES(png_ptr->row_info.pixel_depth,png_ptr->width));
- }
- else /* (png_combine_row() is never called with mask == 0) */
- {
- switch (png_ptr->row_info.pixel_depth)
- {
- case 1: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep sp;
- png_bytep dp;
- int s_inc, s_start, s_end;
- int m;
- int shift;
- png_uint_32 i;
-
- sp = png_ptr->row_buf + 1;
- dp = row;
- m = 0x80;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
- else
-#endif
- {
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
-
- shift = s_start;
-
- for (i = 0; i < png_ptr->width; i++)
- {
- if (m & mask)
- {
- int value;
-
- value = (*sp >> shift) & 0x1;
- *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
- else
- shift += s_inc;
-
- if (m == 1)
- m = 0x80;
- else
- m >>= 1;
- }
- break;
- }
-
- case 2: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep sp;
- png_bytep dp;
- int s_start, s_end, s_inc;
- int m;
- int shift;
- png_uint_32 i;
- int value;
-
- sp = png_ptr->row_buf + 1;
- dp = row;
- m = 0x80;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
- else
-#endif
- {
- s_start = 6;
- s_end = 0;
- s_inc = -2;
- }
-
- shift = s_start;
-
- for (i = 0; i < png_ptr->width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0x3;
- *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
- else
- shift += s_inc;
- if (m == 1)
- m = 0x80;
- else
- m >>= 1;
- }
- break;
- }
-
- case 4: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep sp;
- png_bytep dp;
- int s_start, s_end, s_inc;
- int m;
- int shift;
- png_uint_32 i;
- int value;
-
- sp = png_ptr->row_buf + 1;
- dp = row;
- m = 0x80;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (png_ptr->transformations & PNG_PACKSWAP)
- {
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
- else
-#endif
- {
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
- shift = s_start;
-
- for (i = 0; i < png_ptr->width; i++)
- {
- if (m & mask)
- {
- value = (*sp >> shift) & 0xf;
- *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff);
- *dp |= (png_byte)(value << shift);
- }
-
- if (shift == s_end)
- {
- shift = s_start;
- sp++;
- dp++;
- }
- else
- shift += s_inc;
- if (m == 1)
- m = 0x80;
- else
- m >>= 1;
- }
- break;
- }
-
- case 8: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
-#else
- if (_mmx_supported)
-#endif
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; /* fix 'forbidden register spilled' error */
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; /* global variable for -fPIC version */
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; /* reduce to multiple of 8 */
- diff = (int) (png_ptr->width & 7); /* amount lost */
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" /* load bit pattern */
- "psubb %%mm6, %%mm6 \n\t" /* zero mm6 */
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" /* fill reg with 8 masks */
-
- "movq _mask8_0, %%mm0 \n\t"
- "pand %%mm7, %%mm0 \n\t" /* nonzero if keep byte */
- "pcmpeqb %%mm6, %%mm0 \n\t" /* zeros->1s, v versa */
-
-/* preload "movl len, %%ecx \n\t" // load length of line */
-/* preload "movl srcptr, %%esi \n\t" // load source */
-/* preload "movl dstptr, %%edi \n\t" // load dest */
-
- "cmpl $0, %%ecx \n\t" /* len == 0 ? */
- "je mainloop8end \n\t"
-
- "mainloop8: \n\t"
- "movq (%%esi), %%mm4 \n\t" /* *srcptr */
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "pandn (%%edi), %%mm6 \n\t" /* *dstptr */
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
- "addl $8, %%esi \n\t" /* inc by 8 bytes processed */
- "addl $8, %%edi \n\t"
- "subl $8, %%ecx \n\t" /* dec by 8 pixels processed */
- "ja mainloop8 \n\t"
-
- "mainloop8end: \n\t"
-/* preload "movl diff, %%ecx \n\t" // (diff is in eax) */
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end8 \n\t"
-/* preload "movl mask, %%edx \n\t" */
- "sall $24, %%edx \n\t" /* make low byte, high byte */
-
- "secondloop8: \n\t"
- "sall %%edx \n\t" /* move high bit to CF */
- "jnc skip8 \n\t" /* if CF = 0 */
- "movb (%%esi), %%al \n\t"
- "movb %%al, (%%edi) \n\t"
-
- "skip8: \n\t"
- "incl %%esi \n\t"
- "incl %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop8 \n\t"
-
- "end8: \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=a" (dummy_value_a), /* output regs (dummy) */
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), /* esi // input regs */
- "4" (dstptr), /* edi */
- "0" (diff), /* eax */
-/* was (unmask) "b" RESERVED // ebx // Global Offset Table idx */
- "2" (len), /* ecx */
- "1" (mask) /* edx */
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm4", "%mm6", "%mm7" /* clobber list */
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff /* *BPP1 */ ;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
-
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 8 bpp */
-
- case 16: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
-#else
- if (_mmx_supported)
-#endif
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; /* fix 'forbidden register spilled' error */
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; /* global variable for -fPIC version */
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; /* reduce to multiple of 8 */
- diff = (int) (png_ptr->width & 7); /* amount lost // */
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" /* load bit pattern */
- "psubb %%mm6, %%mm6 \n\t" /* zero mm6 */
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" /* fill reg with 8 masks */
-
- "movq _mask16_0, %%mm0 \n\t"
- "movq _mask16_1, %%mm1 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
-
-/* preload "movl len, %%ecx \n\t" // load length of line */
-/* preload "movl srcptr, %%esi \n\t" // load source */
-/* preload "movl dstptr, %%edi \n\t" // load dest */
-
- "cmpl $0, %%ecx \n\t"
- "jz mainloop16end \n\t"
-
- "mainloop16: \n\t"
- "movq (%%esi), %%mm4 \n\t"
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "movq (%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm6 \n\t"
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm5 \n\t"
- "pand %%mm1, %%mm5 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "movq 8(%%edi), %%mm6 \n\t"
- "pandn %%mm6, %%mm7 \n\t"
- "por %%mm7, %%mm5 \n\t"
- "movq %%mm5, 8(%%edi) \n\t"
-
- "addl $16, %%esi \n\t" /* inc by 16 bytes processed */
- "addl $16, %%edi \n\t"
- "subl $8, %%ecx \n\t" /* dec by 8 pixels processed */
- "ja mainloop16 \n\t"
-
- "mainloop16end: \n\t"
-/* preload "movl diff, %%ecx \n\t" // (diff is in eax) */
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end16 \n\t"
-/* preload "movl mask, %%edx \n\t" */
- "sall $24, %%edx \n\t" /* make low byte, high byte */
-
- "secondloop16: \n\t"
- "sall %%edx \n\t" /* move high bit to CF */
- "jnc skip16 \n\t" /* if CF = 0 */
- "movw (%%esi), %%ax \n\t"
- "movw %%ax, (%%edi) \n\t"
-
- "skip16: \n\t"
- "addl $2, %%esi \n\t"
- "addl $2, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop16 \n\t"
-
- "end16: \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=a" (dummy_value_a), /* output regs (dummy) */
- "=c" (dummy_value_c),
- "=d" (dummy_value_d),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (diff), /* eax // input regs */
-/* was (unmask) " " RESERVED // ebx // Global Offset Table idx */
- "1" (len), /* ecx */
- "2" (mask), /* edx */
- "3" (srcptr), /* esi */
- "4" (dstptr) /* edi */
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm4" /* clobber list */
- , "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP2 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP2 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP2 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP2 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP2;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 16 bpp */
-
- case 24: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
-#else
- if (_mmx_supported)
-#endif
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; /* fix 'forbidden register spilled' error */
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; /* global variable for -fPIC version */
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; /* reduce to multiple of 8 */
- diff = (int) (png_ptr->width & 7); /* amount lost // */
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" /* load bit pattern */
- "psubb %%mm6, %%mm6 \n\t" /* zero mm6 */
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" /* fill reg with 8 masks */
-
- "movq _mask24_0, %%mm0 \n\t"
- "movq _mask24_1, %%mm1 \n\t"
- "movq _mask24_2, %%mm2 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
- "pand %%mm7, %%mm2 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
- "pcmpeqb %%mm6, %%mm2 \n\t"
-
-/* preload "movl len, %%ecx \n\t" // load length of line */
-/* preload "movl srcptr, %%esi \n\t" // load source */
-/* preload "movl dstptr, %%edi \n\t" // load dest */
-
- "cmpl $0, %%ecx \n\t"
- "jz mainloop24end \n\t"
-
- "mainloop24: \n\t"
- "movq (%%esi), %%mm4 \n\t"
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "movq (%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm6 \n\t"
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm5 \n\t"
- "pand %%mm1, %%mm5 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "movq 8(%%edi), %%mm6 \n\t"
- "pandn %%mm6, %%mm7 \n\t"
- "por %%mm7, %%mm5 \n\t"
- "movq %%mm5, 8(%%edi) \n\t"
-
- "movq 16(%%esi), %%mm6 \n\t"
- "pand %%mm2, %%mm6 \n\t"
- "movq %%mm2, %%mm4 \n\t"
- "movq 16(%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm4 \n\t"
- "por %%mm4, %%mm6 \n\t"
- "movq %%mm6, 16(%%edi) \n\t"
-
- "addl $24, %%esi \n\t" /* inc by 24 bytes processed */
- "addl $24, %%edi \n\t"
- "subl $8, %%ecx \n\t" /* dec by 8 pixels processed */
-
- "ja mainloop24 \n\t"
-
- "mainloop24end: \n\t"
-/* preload "movl diff, %%ecx \n\t" // (diff is in eax) */
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end24 \n\t"
-/* preload "movl mask, %%edx \n\t" */
- "sall $24, %%edx \n\t" /* make low byte, high byte */
-
- "secondloop24: \n\t"
- "sall %%edx \n\t" /* move high bit to CF */
- "jnc skip24 \n\t" /* if CF = 0 */
- "movw (%%esi), %%ax \n\t"
- "movw %%ax, (%%edi) \n\t"
- "xorl %%eax, %%eax \n\t"
- "movb 2(%%esi), %%al \n\t"
- "movb %%al, 2(%%edi) \n\t"
-
- "skip24: \n\t"
- "addl $3, %%esi \n\t"
- "addl $3, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop24 \n\t"
-
- "end24: \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=a" (dummy_value_a), /* output regs (dummy) */
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), /* esi // input regs */
- "4" (dstptr), /* edi */
- "0" (diff), /* eax */
-/* was (unmask) "b" RESERVED // ebx // Global Offset Table idx */
- "2" (len), /* ecx */
- "1" (mask) /* edx */
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" /* clobber list */
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP3 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP3 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP3 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP3 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP3;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 24 bpp */
-
- case 32: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
-#else
- if (_mmx_supported)
-#endif
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; /* fix 'forbidden register spilled' error */
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; /* global variable for -fPIC version */
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; /* reduce to multiple of 8 */
- diff = (int) (png_ptr->width & 7); /* amount lost // */
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" /* load bit pattern */
- "psubb %%mm6, %%mm6 \n\t" /* zero mm6 */
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" /* fill reg with 8 masks */
-
- "movq _mask32_0, %%mm0 \n\t"
- "movq _mask32_1, %%mm1 \n\t"
- "movq _mask32_2, %%mm2 \n\t"
- "movq _mask32_3, %%mm3 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
- "pand %%mm7, %%mm2 \n\t"
- "pand %%mm7, %%mm3 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
- "pcmpeqb %%mm6, %%mm2 \n\t"
- "pcmpeqb %%mm6, %%mm3 \n\t"
-
-/* preload "movl len, %%ecx \n\t" // load length of line */
-/* preload "movl srcptr, %%esi \n\t" // load source */
-/* preload "movl dstptr, %%edi \n\t" // load dest */
-
- "cmpl $0, %%ecx \n\t" /* lcr */
- "jz mainloop32end \n\t"
-
- "mainloop32: \n\t"
- "movq (%%esi), %%mm4 \n\t"
- "pand %%mm0, %%mm4 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "movq (%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm6 \n\t"
- "por %%mm6, %%mm4 \n\t"
- "movq %%mm4, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm5 \n\t"
- "pand %%mm1, %%mm5 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "movq 8(%%edi), %%mm6 \n\t"
- "pandn %%mm6, %%mm7 \n\t"
- "por %%mm7, %%mm5 \n\t"
- "movq %%mm5, 8(%%edi) \n\t"
-
- "movq 16(%%esi), %%mm6 \n\t"
- "pand %%mm2, %%mm6 \n\t"
- "movq %%mm2, %%mm4 \n\t"
- "movq 16(%%edi), %%mm7 \n\t"
- "pandn %%mm7, %%mm4 \n\t"
- "por %%mm4, %%mm6 \n\t"
- "movq %%mm6, 16(%%edi) \n\t"
-
- "movq 24(%%esi), %%mm7 \n\t"
- "pand %%mm3, %%mm7 \n\t"
- "movq %%mm3, %%mm5 \n\t"
- "movq 24(%%edi), %%mm4 \n\t"
- "pandn %%mm4, %%mm5 \n\t"
- "por %%mm5, %%mm7 \n\t"
- "movq %%mm7, 24(%%edi) \n\t"
-
- "addl $32, %%esi \n\t" /* inc by 32 bytes processed */
- "addl $32, %%edi \n\t"
- "subl $8, %%ecx \n\t" /* dec by 8 pixels processed */
- "ja mainloop32 \n\t"
-
- "mainloop32end: \n\t"
-/* preload "movl diff, %%ecx \n\t" // (diff is in eax) */
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end32 \n\t"
-/* preload "movl mask, %%edx \n\t" */
- "sall $24, %%edx \n\t" /* low byte => high byte */
-
- "secondloop32: \n\t"
- "sall %%edx \n\t" /* move high bit to CF */
- "jnc skip32 \n\t" /* if CF = 0 */
- "movl (%%esi), %%eax \n\t"
- "movl %%eax, (%%edi) \n\t"
-
- "skip32: \n\t"
- "addl $4, %%esi \n\t"
- "addl $4, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop32 \n\t"
-
- "end32: \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=a" (dummy_value_a), /* output regs (dummy) */
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), /* esi // input regs */
- "4" (dstptr), /* edi */
- "0" (diff), /* eax */
-/* was (unmask) "b" RESERVED // ebx // Global Offset Table idx */
- "2" (len), /* ecx */
- "1" (mask) /* edx */
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2", "%mm3" /* clobber list */
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP4 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP4 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP4 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP4 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP4;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 32 bpp */
-
- case 48: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
- /* && _mmx_supported */ )
-#else
- if (_mmx_supported)
-#endif
- {
- png_uint_32 len;
- int diff;
- int dummy_value_a; /* fix 'forbidden register spilled' error */
- int dummy_value_d;
- int dummy_value_c;
- int dummy_value_S;
- int dummy_value_D;
- _unmask = ~mask; /* global variable for -fPIC version */
- srcptr = png_ptr->row_buf + 1;
- dstptr = row;
- len = png_ptr->width &~7; /* reduce to multiple of 8 */
- diff = (int) (png_ptr->width & 7); /* amount lost // */
-
- __asm__ __volatile__ (
- "movd _unmask, %%mm7 \n\t" /* load bit pattern */
- "psubb %%mm6, %%mm6 \n\t" /* zero mm6 */
- "punpcklbw %%mm7, %%mm7 \n\t"
- "punpcklwd %%mm7, %%mm7 \n\t"
- "punpckldq %%mm7, %%mm7 \n\t" /* fill reg with 8 masks */
-
- "movq _mask48_0, %%mm0 \n\t"
- "movq _mask48_1, %%mm1 \n\t"
- "movq _mask48_2, %%mm2 \n\t"
- "movq _mask48_3, %%mm3 \n\t"
- "movq _mask48_4, %%mm4 \n\t"
- "movq _mask48_5, %%mm5 \n\t"
-
- "pand %%mm7, %%mm0 \n\t"
- "pand %%mm7, %%mm1 \n\t"
- "pand %%mm7, %%mm2 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pand %%mm7, %%mm4 \n\t"
- "pand %%mm7, %%mm5 \n\t"
-
- "pcmpeqb %%mm6, %%mm0 \n\t"
- "pcmpeqb %%mm6, %%mm1 \n\t"
- "pcmpeqb %%mm6, %%mm2 \n\t"
- "pcmpeqb %%mm6, %%mm3 \n\t"
- "pcmpeqb %%mm6, %%mm4 \n\t"
- "pcmpeqb %%mm6, %%mm5 \n\t"
-
-/* preload "movl len, %%ecx \n\t" // load length of line */
-/* preload "movl srcptr, %%esi \n\t" // load source */
-/* preload "movl dstptr, %%edi \n\t" // load dest */
-
- "cmpl $0, %%ecx \n\t"
- "jz mainloop48end \n\t"
-
- "mainloop48: \n\t"
- "movq (%%esi), %%mm7 \n\t"
- "pand %%mm0, %%mm7 \n\t"
- "movq %%mm0, %%mm6 \n\t"
- "pandn (%%edi), %%mm6 \n\t"
- "por %%mm6, %%mm7 \n\t"
- "movq %%mm7, (%%edi) \n\t"
-
- "movq 8(%%esi), %%mm6 \n\t"
- "pand %%mm1, %%mm6 \n\t"
- "movq %%mm1, %%mm7 \n\t"
- "pandn 8(%%edi), %%mm7 \n\t"
- "por %%mm7, %%mm6 \n\t"
- "movq %%mm6, 8(%%edi) \n\t"
-
- "movq 16(%%esi), %%mm6 \n\t"
- "pand %%mm2, %%mm6 \n\t"
- "movq %%mm2, %%mm7 \n\t"
- "pandn 16(%%edi), %%mm7 \n\t"
- "por %%mm7, %%mm6 \n\t"
- "movq %%mm6, 16(%%edi) \n\t"
-
- "movq 24(%%esi), %%mm7 \n\t"
- "pand %%mm3, %%mm7 \n\t"
- "movq %%mm3, %%mm6 \n\t"
- "pandn 24(%%edi), %%mm6 \n\t"
- "por %%mm6, %%mm7 \n\t"
- "movq %%mm7, 24(%%edi) \n\t"
-
- "movq 32(%%esi), %%mm6 \n\t"
- "pand %%mm4, %%mm6 \n\t"
- "movq %%mm4, %%mm7 \n\t"
- "pandn 32(%%edi), %%mm7 \n\t"
- "por %%mm7, %%mm6 \n\t"
- "movq %%mm6, 32(%%edi) \n\t"
-
- "movq 40(%%esi), %%mm7 \n\t"
- "pand %%mm5, %%mm7 \n\t"
- "movq %%mm5, %%mm6 \n\t"
- "pandn 40(%%edi), %%mm6 \n\t"
- "por %%mm6, %%mm7 \n\t"
- "movq %%mm7, 40(%%edi) \n\t"
-
- "addl $48, %%esi \n\t" /* inc by 48 bytes processed */
- "addl $48, %%edi \n\t"
- "subl $8, %%ecx \n\t" /* dec by 8 pixels processed */
-
- "ja mainloop48 \n\t"
-
- "mainloop48end: \n\t"
-/* preload "movl diff, %%ecx \n\t" // (diff is in eax) */
- "movl %%eax, %%ecx \n\t"
- "cmpl $0, %%ecx \n\t"
- "jz end48 \n\t"
-/* preload "movl mask, %%edx \n\t" */
- "sall $24, %%edx \n\t" /* make low byte, high byte */
-
- "secondloop48: \n\t"
- "sall %%edx \n\t" /* move high bit to CF */
- "jnc skip48 \n\t" /* if CF = 0 */
- "movl (%%esi), %%eax \n\t"
- "movl %%eax, (%%edi) \n\t"
-
- "skip48: \n\t"
- "addl $4, %%esi \n\t"
- "addl $4, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz secondloop48 \n\t"
-
- "end48: \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=a" (dummy_value_a), /* output regs (dummy) */
- "=d" (dummy_value_d),
- "=c" (dummy_value_c),
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "3" (srcptr), /* esi // input regs */
- "4" (dstptr), /* edi */
- "0" (diff), /* eax */
-/* was (unmask) "b" RESERVED // ebx // Global Offset Table idx */
- "2" (len), /* ecx */
- "1" (mask) /* edx */
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2", "%mm3" /* clobber list */
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- else /* mmx _not supported - Use modified C routine */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- register png_uint_32 i;
- png_uint_32 initial_val = BPP6 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP6 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP6 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP6 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP6;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
- } /* end of else (_mmx_supported) */
-
- break;
- } /* end 48 bpp */
-
- case 64: /* png_ptr->row_info.pixel_depth */
- {
- png_bytep srcptr;
- png_bytep dstptr;
- register png_uint_32 i;
- png_uint_32 initial_val = BPP8 * png_pass_start[png_ptr->pass];
- /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */
- register int stride = BPP8 * png_pass_inc[png_ptr->pass];
- /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- register int rep_bytes = BPP8 * png_pass_width[png_ptr->pass];
- /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */
- png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */
- int diff = (int) (png_ptr->width & 7); /* amount lost */
- register png_uint_32 final_val = BPP8 * len; /* GRR bugfix */
-
- srcptr = png_ptr->row_buf + 1 + initial_val;
- dstptr = row + initial_val;
-
- for (i = initial_val; i < final_val; i += stride)
- {
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- if (diff) /* number of leftover pixels: 3 for pngtest */
- {
- final_val+=diff*BPP8;
- for (; i < final_val; i += stride)
- {
- if (rep_bytes > (int)(final_val-i))
- rep_bytes = (int)(final_val-i);
- png_memcpy(dstptr, srcptr, rep_bytes);
- srcptr += stride;
- dstptr += stride;
- }
- }
-
- break;
- } /* end 64 bpp */
-
- default: /* png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 */
- {
- /* this should never happen */
- png_warning(png_ptr, "Invalid row_info.pixel_depth in pnggccrd");
- break;
- }
- } /* end switch (png_ptr->row_info.pixel_depth) */
-
- } /* end if (non-trivial mask) */
-
-} /* end png_combine_row() */
-
-#endif /* PNG_HAVE_ASSEMBLER_COMBINE_ROW */
-
-
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ D O _ R E A D _ I N T E R L A C E */
-/* */
-/*===========================================================================*/
-
-#if defined(PNG_READ_INTERLACING_SUPPORTED)
-#if defined(PNG_HAVE_ASSEMBLER_READ_INTERLACE)
-
-/* png_do_read_interlace() is called after any 16-bit to 8-bit conversion
- * has taken place. [GRR: what other steps come before and/or after?]
- */
-
-void /* PRIVATE */
-png_do_read_interlace(png_structp png_ptr)
-{
- png_row_infop row_info = &(png_ptr->row_info);
- png_bytep row = png_ptr->row_buf + 1;
- int pass = png_ptr->pass;
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- png_uint_32 transformations = png_ptr->transformations;
-#endif
-
- png_debug(1, "in png_do_read_interlace (pnggccrd.c)\n");
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
- if (_mmx_supported == 2) {
-#if !defined(PNG_1_0_X)
- /* this should have happened in png_init_mmx_flags() already */
- png_warning(png_ptr, "asm_flags may not have been initialized");
-#endif
- png_mmx_support();
- }
-#endif
-
- if (row != NULL && row_info != NULL)
- {
- png_uint_32 final_width;
-
- final_width = row_info->width * png_pass_inc[pass];
-
- switch (row_info->pixel_depth)
- {
- case 1:
- {
- png_bytep sp, dp;
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_byte v;
- png_uint_32 i;
- int j;
-
- sp = row + (png_size_t)((row_info->width - 1) >> 3);
- dp = row + (png_size_t)((final_width - 1) >> 3);
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (int)((row_info->width + 7) & 7);
- dshift = (int)((final_width + 7) & 7);
- s_start = 7;
- s_end = 0;
- s_inc = -1;
- }
- else
-#endif
- {
- sshift = 7 - (int)((row_info->width + 7) & 7);
- dshift = 7 - (int)((final_width + 7) & 7);
- s_start = 0;
- s_end = 7;
- s_inc = 1;
- }
-
- for (i = row_info->width; i; i--)
- {
- v = (png_byte)((*sp >> sshift) & 0x1);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
- else
- dshift += s_inc;
- }
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
- else
- sshift += s_inc;
- }
- break;
- }
-
- case 2:
- {
- png_bytep sp, dp;
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_uint_32 i;
-
- sp = row + (png_size_t)((row_info->width - 1) >> 2);
- dp = row + (png_size_t)((final_width - 1) >> 2);
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (png_size_t)(((row_info->width + 3) & 3) << 1);
- dshift = (png_size_t)(((final_width + 3) & 3) << 1);
- s_start = 6;
- s_end = 0;
- s_inc = -2;
- }
- else
-#endif
- {
- sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1);
- dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1);
- s_start = 0;
- s_end = 6;
- s_inc = 2;
- }
-
- for (i = row_info->width; i; i--)
- {
- png_byte v;
- int j;
-
- v = (png_byte)((*sp >> sshift) & 0x3);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
- else
- dshift += s_inc;
- }
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
- else
- sshift += s_inc;
- }
- break;
- }
-
- case 4:
- {
- png_bytep sp, dp;
- int sshift, dshift;
- int s_start, s_end, s_inc;
- png_uint_32 i;
-
- sp = row + (png_size_t)((row_info->width - 1) >> 1);
- dp = row + (png_size_t)((final_width - 1) >> 1);
-#if defined(PNG_READ_PACKSWAP_SUPPORTED)
- if (transformations & PNG_PACKSWAP)
- {
- sshift = (png_size_t)(((row_info->width + 1) & 1) << 2);
- dshift = (png_size_t)(((final_width + 1) & 1) << 2);
- s_start = 4;
- s_end = 0;
- s_inc = -4;
- }
- else
-#endif
- {
- sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2);
- dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2);
- s_start = 0;
- s_end = 4;
- s_inc = 4;
- }
-
- for (i = row_info->width; i; i--)
- {
- png_byte v;
- int j;
-
- v = (png_byte)((*sp >> sshift) & 0xf);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff);
- *dp |= (png_byte)(v << dshift);
- if (dshift == s_end)
- {
- dshift = s_start;
- dp--;
- }
- else
- dshift += s_inc;
- }
- if (sshift == s_end)
- {
- sshift = s_start;
- sp--;
- }
- else
- sshift += s_inc;
- }
- break;
- }
-
- /*====================================================================*/
-
- default: /* 8-bit or larger (this is where the routine is modified) */
- {
-#if 0
-/* static unsigned long long _const4 = 0x0000000000FFFFFFLL; no good */
-/* static unsigned long long const4 = 0x0000000000FFFFFFLL; no good */
-/* unsigned long long _const4 = 0x0000000000FFFFFFLL; no good */
-/* unsigned long long const4 = 0x0000000000FFFFFFLL; no good */
-#endif
- png_bytep sptr, dp;
- png_uint_32 i;
- png_size_t pixel_bytes;
- int width = (int)row_info->width;
-
- pixel_bytes = (row_info->pixel_depth >> 3);
-
- /* point sptr at the last pixel in the pre-expanded row: */
- sptr = row + (width - 1) * pixel_bytes;
-
- /* point dp at the last pixel position in the expanded row: */
- dp = row + (final_width - 1) * pixel_bytes;
-
- /* New code by Nirav Chhatrapati - Intel Corporation */
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)
- /* && _mmx_supported */ )
-#else
- if (_mmx_supported)
-#endif
- {
- //--------------------------------------------------------------
- if (pixel_bytes == 3)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $21, %%edi \n\t"
- /* (png_pass_inc[pass] - 1)*pixel_bytes */
-
- ".loop3_pass0: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x x 2 1 0 */
- "pand _const4, %%mm0 \n\t" /* z z z z z 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* z z z z z 2 1 0 */
- "psllq $16, %%mm0 \n\t" /* z z z 2 1 0 z z */
- "movq %%mm0, %%mm2 \n\t" /* z z z 2 1 0 z z */
- "psllq $24, %%mm0 \n\t" /* 2 1 0 z z z z z */
- "psrlq $8, %%mm1 \n\t" /* z z z z z z 2 1 */
- "por %%mm2, %%mm0 \n\t" /* 2 1 0 2 1 0 z z */
- "por %%mm1, %%mm0 \n\t" /* 2 1 0 2 1 0 2 1 */
- "movq %%mm0, %%mm3 \n\t" /* 2 1 0 2 1 0 2 1 */
- "psllq $16, %%mm0 \n\t" /* 0 2 1 0 2 1 z z */
- "movq %%mm3, %%mm4 \n\t" /* 2 1 0 2 1 0 2 1 */
- "punpckhdq %%mm0, %%mm3 \n\t" /* 0 2 1 0 2 1 0 2 */
- "movq %%mm4, 16(%%edi) \n\t"
- "psrlq $32, %%mm0 \n\t" /* z z z z 0 2 1 0 */
- "movq %%mm3, 8(%%edi) \n\t"
- "punpckldq %%mm4, %%mm0 \n\t" /* 1 0 2 1 0 2 1 0 */
- "subl $3, %%esi \n\t"
- "movq %%mm0, (%%edi) \n\t"
- "subl $24, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop3_pass0 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width), // ecx
- "rim" (_const4) // %1(?) (0x0000000000FFFFFFLL)
-
-#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" /* clobber list */
- , "%mm3", "%mm4"
-#endif
- );
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $9, %%edi \n\t"
- /* (png_pass_inc[pass] - 1)*pixel_bytes */
-
- ".loop3_pass2: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x x 2 1 0 */
- "pand _const4, %%mm0 \n\t" /* z z z z z 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* z z z z z 2 1 0 */
- "psllq $16, %%mm0 \n\t" /* z z z 2 1 0 z z */
- "movq %%mm0, %%mm2 \n\t" /* z z z 2 1 0 z z */
- "psllq $24, %%mm0 \n\t" /* 2 1 0 z z z z z */
- "psrlq $8, %%mm1 \n\t" /* z z z z z z 2 1 */
- "por %%mm2, %%mm0 \n\t" /* 2 1 0 2 1 0 z z */
- "por %%mm1, %%mm0 \n\t" /* 2 1 0 2 1 0 2 1 */
- "movq %%mm0, 4(%%edi) \n\t"
- "psrlq $16, %%mm0 \n\t" /* z z 2 1 0 2 1 0 */
- "subl $3, %%esi \n\t"
- "movd %%mm0, (%%edi) \n\t"
- "subl $12, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop3_pass2 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width), // ecx
- "rim" (_const4) // (0x0000000000FFFFFFLL)
-
-#if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" /* clobber list */
-#endif
- );
- }
- else if (width) /* && ((pass == 4) || (pass == 5)) */
- {
- int width_mmx = ((width >> 1) << 1) - 8; /* GRR: huh? */
- if (width_mmx < 0)
- width_mmx = 0;
- width -= width_mmx; /* 8 or 9 pix, 24 or 27 bytes */
- if (width_mmx)
- {
- /* png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */
- /* sptr points at last pixel in pre-expanded row */
- /* dp points at last pixel position in expanded row */
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $3, %%esi \n\t"
- "subl $9, %%edi \n\t"
- /* (png_pass_inc[pass] + 1)*pixel_bytes */
-
- ".loop3_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* x x 5 4 3 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* x x 5 4 3 2 1 0 */
- "movq %%mm0, %%mm2 \n\t" /* x x 5 4 3 2 1 0 */
- "psllq $24, %%mm0 \n\t" /* 4 3 2 1 0 z z z */
- "pand _const4, %%mm1 \n\t" /* z z z z z 2 1 0 */
- "psrlq $24, %%mm2 \n\t" /* z z z x x 5 4 3 */
- "por %%mm1, %%mm0 \n\t" /* 4 3 2 1 0 2 1 0 */
- "movq %%mm2, %%mm3 \n\t" /* z z z x x 5 4 3 */
- "psllq $8, %%mm2 \n\t" /* z z x x 5 4 3 z */
- "movq %%mm0, (%%edi) \n\t"
- "psrlq $16, %%mm3 \n\t" /* z z z z z x x 5 */
- "pand _const6, %%mm3 \n\t" /* z z z z z z z 5 */
- "por %%mm3, %%mm2 \n\t" /* z z x x 5 4 3 5 */
- "subl $6, %%esi \n\t"
- "movd %%mm2, 8(%%edi) \n\t"
- "subl $12, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop3_pass4 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), // esi // input regs
- "2" (dp), // edi
- "0" (width_mmx), // ecx
- "rim" (_const4), // 0x0000000000FFFFFFLL
- "rim" (_const6) // 0x00000000000000FFLL
-
-#if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
- , "%mm2", "%mm3"
-#endif
- );
- }
-
- sptr -= width_mmx*3;
- dp -= width_mmx*6;
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
-
- png_memcpy(v, sptr, 3);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 3);
- dp -= 3;
- }
- sptr -= 3;
- }
- }
- } /* end of pixel_bytes == 3 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 1)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int width_mmx = ((width >> 2) << 2);
- width -= width_mmx; /* 0-3 pixels => 0-3 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $3, %%esi \n\t"
- "subl $31, %%edi \n\t"
-
- ".loop1_pass0: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x 3 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* x x x x 3 2 1 0 */
- "punpcklbw %%mm0, %%mm0 \n\t" /* 3 3 2 2 1 1 0 0 */
- "movq %%mm0, %%mm2 \n\t" /* 3 3 2 2 1 1 0 0 */
- "punpcklwd %%mm0, %%mm0 \n\t" /* 1 1 1 1 0 0 0 0 */
- "movq %%mm0, %%mm3 \n\t" /* 1 1 1 1 0 0 0 0 */
- "punpckldq %%mm0, %%mm0 \n\t" /* 0 0 0 0 0 0 0 0 */
- "punpckhdq %%mm3, %%mm3 \n\t" /* 1 1 1 1 1 1 1 1 */
- "movq %%mm0, (%%edi) \n\t"
- "punpckhwd %%mm2, %%mm2 \n\t" /* 3 3 3 3 2 2 2 2 */
- "movq %%mm3, 8(%%edi) \n\t"
- "movq %%mm2, %%mm4 \n\t" /* 3 3 3 3 2 2 2 2 */
- "punpckldq %%mm2, %%mm2 \n\t" /* 2 2 2 2 2 2 2 2 */
- "punpckhdq %%mm4, %%mm4 \n\t" /* 3 3 3 3 3 3 3 3 */
- "movq %%mm2, 16(%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm4, 24(%%edi) \n\t"
- "subl $32, %%edi \n\t"
- "subl $4, %%ecx \n\t"
- "jnz .loop1_pass0 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1", "%mm2" /* clobber list */
- , "%mm3", "%mm4"
-#endif
- );
- }
-
- sptr -= width_mmx;
- dp -= width_mmx*8;
- for (i = width; i; i--)
- {
- int j;
-
- /* I simplified this part in version 1.0.4e
- * here and in several other instances where
- * pixel_bytes == 1 -- GR-P
- *
- * Original code:
- *
- * png_byte v[8];
- * png_memcpy(v, sptr, pixel_bytes);
- * for (j = 0; j < png_pass_inc[pass]; j++)
- * {
- * png_memcpy(dp, v, pixel_bytes);
- * dp -= pixel_bytes;
- * }
- * sptr -= pixel_bytes;
- *
- * Replacement code is in the next three lines:
- */
-
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int width_mmx = ((width >> 2) << 2);
- width -= width_mmx; /* 0-3 pixels => 0-3 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $3, %%esi \n\t"
- "subl $15, %%edi \n\t"
-
- ".loop1_pass2: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x 3 2 1 0 */
- "punpcklbw %%mm0, %%mm0 \n\t" /* 3 3 2 2 1 1 0 0 */
- "movq %%mm0, %%mm1 \n\t" /* 3 3 2 2 1 1 0 0 */
- "punpcklwd %%mm0, %%mm0 \n\t" /* 1 1 1 1 0 0 0 0 */
- "punpckhwd %%mm1, %%mm1 \n\t" /* 3 3 3 3 2 2 2 2 */
- "movq %%mm0, (%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $4, %%ecx \n\t"
- "jnz .loop1_pass2 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= width_mmx;
- dp -= width_mmx*4;
- for (i = width; i; i--)
- {
- int j;
-
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- else if (width) /* && ((pass == 4) || (pass == 5)) */
- {
- int width_mmx = ((width >> 3) << 3);
- width -= width_mmx; /* 0-3 pixels => 0-3 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $7, %%esi \n\t"
- "subl $15, %%edi \n\t"
-
- ".loop1_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* 7 6 5 4 3 2 1 0 */
- "punpcklbw %%mm0, %%mm0 \n\t" /* 3 3 2 2 1 1 0 0 */
- "punpckhbw %%mm1, %%mm1 \n\t" /* 7 7 6 6 5 5 4 4 */
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, (%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $8, %%ecx \n\t"
- "jnz .loop1_pass4 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (none) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= width_mmx;
- dp -= width_mmx*2;
- for (i = width; i; i--)
- {
- int j;
-
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- } /* end of pixel_bytes == 1 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 2)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int width_mmx = ((width >> 1) << 1);
- width -= width_mmx; /* 0,1 pixels => 0,2 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $2, %%esi \n\t"
- "subl $30, %%edi \n\t"
-
- ".loop2_pass0: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x 3 2 1 0 */
- "punpcklwd %%mm0, %%mm0 \n\t" /* 3 2 3 2 1 0 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* 3 2 3 2 1 0 1 0 */
- "punpckldq %%mm0, %%mm0 \n\t" /* 1 0 1 0 1 0 1 0 */
- "punpckhdq %%mm1, %%mm1 \n\t" /* 3 2 3 2 3 2 3 2 */
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm1, 16(%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm1, 24(%%edi) \n\t"
- "subl $32, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop2_pass0 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= (width_mmx*2 - 2); /* sign fixed */
- dp -= (width_mmx*16 - 2); /* sign fixed */
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 2;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 2;
- png_memcpy(dp, v, 2);
- }
- }
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx; /* 0,1 pixels => 0,2 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $2, %%esi \n\t"
- "subl $14, %%edi \n\t"
-
- ".loop2_pass2: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x 3 2 1 0 */
- "punpcklwd %%mm0, %%mm0 \n\t" /* 3 2 3 2 1 0 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* 3 2 3 2 1 0 1 0 */
- "punpckldq %%mm0, %%mm0 \n\t" /* 1 0 1 0 1 0 1 0 */
- "punpckhdq %%mm1, %%mm1 \n\t" /* 3 2 3 2 3 2 3 2 */
- "movq %%mm0, (%%edi) \n\t"
- "subl $4, %%esi \n\t"
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop2_pass2 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= (width_mmx*2 - 2); /* sign fixed */
- dp -= (width_mmx*8 - 2); /* sign fixed */
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 2;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 2;
- png_memcpy(dp, v, 2);
- }
- }
- }
- else if (width) /* pass == 4 or 5 */
- {
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx; /* 0,1 pixels => 0,2 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $2, %%esi \n\t"
- "subl $6, %%edi \n\t"
-
- ".loop2_pass4: \n\t"
- "movd (%%esi), %%mm0 \n\t" /* x x x x 3 2 1 0 */
- "punpcklwd %%mm0, %%mm0 \n\t" /* 3 2 3 2 1 0 1 0 */
- "subl $4, %%esi \n\t"
- "movq %%mm0, (%%edi) \n\t"
- "subl $8, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop2_pass4 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" /* clobber list */
-#endif
- );
- }
-
- sptr -= (width_mmx*2 - 2); /* sign fixed */
- dp -= (width_mmx*4 - 2); /* sign fixed */
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 2;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 2;
- png_memcpy(dp, v, 2);
- }
- }
- }
- } /* end of pixel_bytes == 2 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 4)
- {
- if (((pass == 0) || (pass == 1)) && width)
- {
- int width_mmx = ((width >> 1) << 1);
- width -= width_mmx; /* 0,1 pixels => 0,4 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $4, %%esi \n\t"
- "subl $60, %%edi \n\t"
-
- ".loop4_pass0: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* 7 6 5 4 3 2 1 0 */
- "punpckldq %%mm0, %%mm0 \n\t" /* 3 2 1 0 3 2 1 0 */
- "punpckhdq %%mm1, %%mm1 \n\t" /* 7 6 5 4 7 6 5 4 */
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm0, 16(%%edi) \n\t"
- "movq %%mm0, 24(%%edi) \n\t"
- "movq %%mm1, 32(%%edi) \n\t"
- "movq %%mm1, 40(%%edi) \n\t"
- "movq %%mm1, 48(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm1, 56(%%edi) \n\t"
- "subl $64, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop4_pass0 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= (width_mmx*4 - 4); /* sign fixed */
- dp -= (width_mmx*32 - 4); /* sign fixed */
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 4;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 4;
- png_memcpy(dp, v, 4);
- }
- }
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- int width_mmx = ((width >> 1) << 1);
- width -= width_mmx; /* 0,1 pixels => 0,4 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $4, %%esi \n\t"
- "subl $28, %%edi \n\t"
-
- ".loop4_pass2: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* 7 6 5 4 3 2 1 0 */
- "punpckldq %%mm0, %%mm0 \n\t" /* 3 2 1 0 3 2 1 0 */
- "punpckhdq %%mm1, %%mm1 \n\t" /* 7 6 5 4 7 6 5 4 */
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm1, 16(%%edi) \n\t"
- "movq %%mm1, 24(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "subl $32, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop4_pass2 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= (width_mmx*4 - 4); /* sign fixed */
- dp -= (width_mmx*16 - 4); /* sign fixed */
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 4;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 4;
- png_memcpy(dp, v, 4);
- }
- }
- }
- else if (width) /* pass == 4 or 5 */
- {
- int width_mmx = ((width >> 1) << 1) ;
- width -= width_mmx; /* 0,1 pixels => 0,4 bytes */
- if (width_mmx)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $4, %%esi \n\t"
- "subl $12, %%edi \n\t"
-
- ".loop4_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, %%mm1 \n\t" /* 7 6 5 4 3 2 1 0 */
- "punpckldq %%mm0, %%mm0 \n\t" /* 3 2 1 0 3 2 1 0 */
- "punpckhdq %%mm1, %%mm1 \n\t" /* 7 6 5 4 7 6 5 4 */
- "movq %%mm0, (%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm1, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "subl $2, %%ecx \n\t"
- "jnz .loop4_pass4 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width_mmx) /* ecx */
-
-#if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0", "%mm1" /* clobber list */
-#endif
- );
- }
-
- sptr -= (width_mmx*4 - 4); /* sign fixed */
- dp -= (width_mmx*8 - 4); /* sign fixed */
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- sptr -= 4;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- dp -= 4;
- png_memcpy(dp, v, 4);
- }
- }
- }
- } /* end of pixel_bytes == 4 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 8)
- {
-/* GRR TEST: should work, but needs testing (special 64-bit version of rpng2?) */
- /* GRR NOTE: no need to combine passes here! */
- if (((pass == 0) || (pass == 1)) && width)
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- /* source is 8-byte RRGGBBAA */
- /* dest is 64-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA ... */
- __asm__ __volatile__ (
- "subl $56, %%edi \n\t" /* start of last block */
-
- ".loop8_pass0: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm0, 16(%%edi) \n\t"
- "movq %%mm0, 24(%%edi) \n\t"
- "movq %%mm0, 32(%%edi) \n\t"
- "movq %%mm0, 40(%%edi) \n\t"
- "movq %%mm0, 48(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, 56(%%edi) \n\t"
- "subl $64, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop8_pass0 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width) /* ecx */
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" /* clobber list */
-#endif
- );
- }
- else if (((pass == 2) || (pass == 3)) && width)
- {
- /* source is 8-byte RRGGBBAA */
- /* dest is 32-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA */
- /* (recall that expansion is _in place_: sptr and dp */
- /* both point at locations within same row buffer) */
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $24, %%edi \n\t" /* start of last block */
-
- ".loop8_pass2: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, (%%edi) \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "movq %%mm0, 16(%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, 24(%%edi) \n\t"
- "subl $32, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop8_pass2 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width) /* ecx */
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" /* clobber list */
-#endif
- );
- }
- }
- else if (width) /* pass == 4 or 5 */
- {
- /* source is 8-byte RRGGBBAA */
- /* dest is 16-byte RRGGBBAA RRGGBBAA */
- {
- int dummy_value_c; /* fix 'forbidden register spilled' */
- int dummy_value_S;
- int dummy_value_D;
-
- __asm__ __volatile__ (
- "subl $8, %%edi \n\t" /* start of last block */
-
- ".loop8_pass4: \n\t"
- "movq (%%esi), %%mm0 \n\t" /* 7 6 5 4 3 2 1 0 */
- "movq %%mm0, (%%edi) \n\t"
- "subl $8, %%esi \n\t"
- "movq %%mm0, 8(%%edi) \n\t"
- "subl $16, %%edi \n\t"
- "decl %%ecx \n\t"
- "jnz .loop8_pass4 \n\t"
- "EMMS \n\t" /* DONE */
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "1" (sptr), /* esi // input regs */
- "2" (dp), /* edi */
- "0" (width) /* ecx */
-
-#if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */
- : "%mm0" /* clobber list */
-#endif
- );
- }
- }
-
- } /* end of pixel_bytes == 8 */
-
- //--------------------------------------------------------------
- else if (pixel_bytes == 6)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 6);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 6);
- dp -= 6;
- }
- sptr -= 6;
- }
- } /* end of pixel_bytes == 6 */
-
- //--------------------------------------------------------------
- else
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, pixel_bytes);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, pixel_bytes);
- dp -= pixel_bytes;
- }
- sptr-= pixel_bytes;
- }
- }
- } /* end of _mmx_supported ======================================== */
-
- else /* MMX not supported: use modified C code - takes advantage
- * of inlining of png_memcpy for a constant */
- /* GRR 19991007: does it? or should pixel_bytes in each
- * block be replaced with immediate value (e.g., 1)? */
- /* GRR 19991017: replaced with constants in each case */
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- if (pixel_bytes == 1)
- {
- for (i = width; i; i--)
- {
- int j;
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- *dp-- = *sptr;
- }
- --sptr;
- }
- }
- else if (pixel_bytes == 3)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 3);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 3);
- dp -= 3;
- }
- sptr -= 3;
- }
- }
- else if (pixel_bytes == 2)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 2);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 2);
- dp -= 2;
- }
- sptr -= 2;
- }
- }
- else if (pixel_bytes == 4)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 4);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
-#ifdef PNG_DEBUG
- if (dp < row || dp+3 > row+png_ptr->row_buf_size)
- {
- printf("dp out of bounds: row=%d, dp=%d, rp=%d\n",
- row, dp, row+png_ptr->row_buf_size);
- printf("row_buf=%d\n",png_ptr->row_buf_size);
- }
-#endif
- png_memcpy(dp, v, 4);
- dp -= 4;
- }
- sptr -= 4;
- }
- }
- else if (pixel_bytes == 6)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 6);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 6);
- dp -= 6;
- }
- sptr -= 6;
- }
- }
- else if (pixel_bytes == 8)
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, 8);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, 8);
- dp -= 8;
- }
- sptr -= 8;
- }
- }
- else /* GRR: should never be reached */
- {
- for (i = width; i; i--)
- {
- png_byte v[8];
- int j;
- png_memcpy(v, sptr, pixel_bytes);
- for (j = 0; j < png_pass_inc[pass]; j++)
- {
- png_memcpy(dp, v, pixel_bytes);
- dp -= pixel_bytes;
- }
- sptr -= pixel_bytes;
- }
- }
-
- } /* end if (MMX not supported) */
- break;
- }
- } /* end switch (row_info->pixel_depth) */
-
- row_info->width = final_width;
-
- row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,final_width);
- }
-
-} /* end png_do_read_interlace() */
-
-#endif /* PNG_HAVE_ASSEMBLER_READ_INTERLACE */
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-
-
-
-#if defined(PNG_HAVE_ASSEMBLER_READ_FILTER_ROW)
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-
-/* These variables are utilized in the functions below. They are declared */
-/* globally here to ensure alignment on 8-byte boundaries. */
-
-union uAll {
- long long use;
- double align;
-} _LBCarryMask = {0x0101010101010101LL},
- _HBClearMask = {0x7f7f7f7f7f7f7f7fLL},
- _ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem;
-
-#ifdef PNG_THREAD_UNSAFE_OK
-/*===========================================================================*/
-/* */
-/* P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G */
-/* */
-/*===========================================================================*/
-
-/* Optimized code for PNG Average filter decoder */
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row,
- png_bytep prev_row)
-{
- int bpp;
- int dummy_value_c; /* fix 'forbidden register 2 (cx) was spilled' error */
- int dummy_value_S;
- int dummy_value_D;
-
- bpp = (row_info->pixel_depth + 7) >> 3; /* get # bytes per pixel */
- _FullLength = row_info->rowbytes; /* # of bytes to filter */
-
- __asm__ __volatile__ (
- /* initialize address pointers and offset */
-#ifdef __PIC__
- "pushl %%ebx \n\t" /* save index to Global Offset Table */
-#endif
-/*pre "movl row, %%edi \n\t" */ /* edi: Avg(x) */
- "xorl %%ebx, %%ebx \n\t" /* ebx: x */
- "movl %%edi, %%edx \n\t"
-/*pre "movl prev_row, %%esi \n\t" */ /* esi: Prior(x) */
-/*pre "subl bpp, %%edx \n\t" */ /* (bpp is preloaded into ecx) */
- "subl %%ecx, %%edx \n\t" /* edx: Raw(x-bpp) */
-
- "xorl %%eax,%%eax \n\t"
-
- /* Compute the Raw value for the first bpp bytes */
- /* Raw(x) = Avg(x) + (Prior(x)/2) */
- "avg_rlp: \n\t"
- "movb (%%esi,%%ebx,),%%al \n\t" /* load al with Prior(x) */
- "incl %%ebx \n\t"
- "shrb %%al \n\t" /* divide by 2 */
- "addb -1(%%edi,%%ebx,),%%al \n\t" /* add Avg(x); -1 to offset inc ebx */
-/* pre "cmpl bpp, %%ebx \n\t" */ /* (bpp is preloaded into ecx) */
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al,-1(%%edi,%%ebx,) \n\t" /* write Raw(x); -1 to offset inc ebx */
- "jb avg_rlp \n\t" /* mov does not affect flags */
-
- /* get # of bytes to alignment */
- "movl %%edi, _dif \n\t" /* take start of row */
- "addl %%ebx, _dif \n\t" /* add bpp */
- "addl $0xf, _dif \n\t" /* add 7+8 to incr past alignment bdry */
- "andl $0xfffffff8, _dif \n\t" /* mask to alignment boundary */
- "subl %%edi, _dif \n\t" /* subtract from start => value ebx at */
- "jz avg_go \n\t" /* alignment */
-
- /* fix alignment */
- /* Compute the Raw value for the bytes up to the alignment boundary */
- /* Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) */
- "xorl %%ecx, %%ecx \n\t"
-
- "avg_lp1: \n\t"
- "xorl %%eax, %%eax \n\t"
- "movb (%%esi,%%ebx,), %%cl \n\t" /* load cl with Prior(x) */
- "movb (%%edx,%%ebx,), %%al \n\t" /* load al with Raw(x-bpp) */
- "addw %%cx, %%ax \n\t"
- "incl %%ebx \n\t"
- "shrw %%ax \n\t" /* divide by 2 */
- "addb -1(%%edi,%%ebx,), %%al \n\t" /* add Avg(x); -1 to offset inc ebx */
- "cmpl _dif, %%ebx \n\t" /* check if at alignment boundary */
- "movb %%al, -1(%%edi,%%ebx,) \n\t" /* write Raw(x); -1 to offset inc ebx */
- "jb avg_lp1 \n\t" /* repeat until at alignment boundary */
-
- "avg_go: \n\t"
- "movl _FullLength, %%eax \n\t"
- "movl %%eax, %%ecx \n\t"
- "subl %%ebx, %%eax \n\t" /* subtract alignment fix */
- "andl $0x00000007, %%eax \n\t" /* calc bytes over mult of 8 */
- "subl %%eax, %%ecx \n\t" /* drop over bytes from original length */
- "movl %%ecx, _MMXLength \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" /* restore index to Global Offset Table */
-#endif
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), /* ecx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%edx" /* clobber list */
-#ifndef __PIC__
- , "%ebx"
-#endif
- /* GRR: INCLUDE "memory" as clobbered? (_dif, _MMXLength) */
- /* (seems to work fine without...) */
- );
-
- /* now do the math for the rest of the row */
- switch (bpp)
- {
- case 3:
- {
- _ActiveMask.use = 0x0000000000ffffffLL;
- _ShiftBpp.use = 24; /* == 3 * 8 */
- _ShiftRem.use = 40; /* == 64 - 24 */
-
- __asm__ __volatile__ (
- /* re-init address pointers and offset */
- "movq _ActiveMask, %%mm7 \n\t"
- "movl _dif, %%ecx \n\t" /* ecx: x = offset to */
- "movq _LBCarryMask, %%mm5 \n\t" /* alignment boundary */
-/* preload "movl row, %%edi \n\t" // edi: Avg(x) */
- "movq _HBClearMask, %%mm4 \n\t"
-/* preload "movl prev_row, %%esi \n\t" // esi: Prior(x) */
-
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" /* load previous aligned 8 bytes */
- /* (correct pos. in loop below) */
- "avg_3lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t" /* load mm0 with Avg(x) */
- "movq %%mm5, %%mm3 \n\t"
- "psrlq _ShiftRem, %%mm2 \n\t" /* correct position Raw(x-bpp) */
- /* data */
- "movq (%%esi,%%ecx,), %%mm1 \n\t" /* load mm1 with Prior(x) */
- "movq %%mm7, %%mm6 \n\t"
- "pand %%mm1, %%mm3 \n\t" /* get lsb for each prev_row byte */
- "psrlq $1, %%mm1 \n\t" /* divide prev_row bytes by 2 */
- "pand %%mm4, %%mm1 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm0 \n\t" /* add (Prev_row/2) to Avg for */
- /* each byte */
- /* add 1st active group (Raw(x-bpp)/2) to average with LBCarry */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 1 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active */
- /* byte */
- /* add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry */
- "psllq _ShiftBpp, %%mm6 \n\t" /* shift the mm6 mask to cover */
- /* bytes 3-5 */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "psllq _ShiftBpp, %%mm2 \n\t" /* shift data to pos. correctly */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 2 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active */
- /* byte */
-
- /* add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry */
- "psllq _ShiftBpp, %%mm6 \n\t" /* shift mm6 mask to cover last */
- /* two */
- /* bytes */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "psllq _ShiftBpp, %%mm2 \n\t" /* shift data to pos. correctly */
- /* Data only needs to be shifted once here to */
- /* get the correct x-bpp offset. */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 2 */
- /* bytes to add to Avg */
- "addl $8, %%ecx \n\t"
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active */
- /* byte */
- /* now ready to write back to memory */
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- /* move updated Raw(x) to use as Raw(x-bpp) for next loop */
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raw(x) to mm2 */
- "jb avg_3lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 3 bpp */
-
- case 6:
- case 4:
- //case 7: /* who wrote this? PNG doesn't support 5 or 7 bytes/pixel */
- //case 5: /* GRR BOGUS */
- {
- _ActiveMask.use = 0xffffffffffffffffLL; /* use shift below to clear */
- /* appropriate inactive bytes */
- _ShiftBpp.use = bpp << 3;
- _ShiftRem.use = 64 - _ShiftBpp.use;
-
- __asm__ __volatile__ (
- "movq _HBClearMask, %%mm4 \n\t"
-
- /* re-init address pointers and offset */
- "movl _dif, %%ecx \n\t" /* ecx: x = offset to */
- /* alignment boundary */
-
- /* load _ActiveMask and clear all bytes except for 1st active group */
- "movq _ActiveMask, %%mm7 \n\t"
-/* preload "movl row, %%edi \n\t" // edi: Avg(x) */
- "psrlq _ShiftRem, %%mm7 \n\t"
-/* preload "movl prev_row, %%esi \n\t" // esi: Prior(x) */
- "movq %%mm7, %%mm6 \n\t"
- "movq _LBCarryMask, %%mm5 \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t" /* create mask for 2nd active */
- /* group */
-
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" /* load previous aligned 8 bytes */
- /* (we correct pos. in loop below) */
- "avg_4lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t"
- "psrlq _ShiftRem, %%mm2 \n\t" /* shift data to pos. correctly */
- "movq (%%esi,%%ecx,), %%mm1 \n\t"
- /* add (Prev_row/2) to average */
- "movq %%mm5, %%mm3 \n\t"
- "pand %%mm1, %%mm3 \n\t" /* get lsb for each prev_row byte */
- "psrlq $1, %%mm1 \n\t" /* divide prev_row bytes by 2 */
- "pand %%mm4, %%mm1 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm0 \n\t" /* add (Prev_row/2) to Avg for */
- /* each byte */
- /* add 1st active group (Raw(x-bpp)/2) to average with _LBCarry */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm7, %%mm2 \n\t" /* leave only Active Group 1 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to Avg */
- /* for each Active */
- /* byte */
- /* add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "psllq _ShiftBpp, %%mm2 \n\t" /* shift data to pos. correctly */
- "addl $8, %%ecx \n\t"
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 2 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active */
- /* byte */
- "cmpl _MMXLength, %%ecx \n\t"
- /* now ready to write back to memory */
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- /* prep Raw(x-bpp) for next loop */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "jb avg_4lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 4,6 bpp */
-
- case 2:
- {
- _ActiveMask.use = 0x000000000000ffffLL;
- _ShiftBpp.use = 16; /* == 2 * 8 */
- _ShiftRem.use = 48; /* == 64 - 16 */
-
- __asm__ __volatile__ (
- /* load _ActiveMask */
- "movq _ActiveMask, %%mm7 \n\t"
- /* re-init address pointers and offset */
- "movl _dif, %%ecx \n\t" /* ecx: x = offset to alignment */
- /* boundary */
- "movq _LBCarryMask, %%mm5 \n\t"
-/* preload "movl row, %%edi \n\t" // edi: Avg(x) */
- "movq _HBClearMask, %%mm4 \n\t"
-/* preload "movl prev_row, %%esi \n\t" // esi: Prior(x) */
-
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" /* load previous aligned 8 bytes */
- /* (we correct pos. in loop below) */
- "avg_2lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t"
- "psrlq _ShiftRem, %%mm2 \n\t" /* shift data to pos. correctly */
- "movq (%%esi,%%ecx,), %%mm1 \n\t" /* (GRR BUGFIX: was psllq) */
- /* add (Prev_row/2) to average */
- "movq %%mm5, %%mm3 \n\t"
- "pand %%mm1, %%mm3 \n\t" /* get lsb for each prev_row byte */
- "psrlq $1, %%mm1 \n\t" /* divide prev_row bytes by 2 */
- "pand %%mm4, %%mm1 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "movq %%mm7, %%mm6 \n\t"
- "paddb %%mm1, %%mm0 \n\t" /* add (Prev_row/2) to Avg for */
- /* each byte */
-
- /* add 1st active group (Raw(x-bpp)/2) to average with _LBCarry */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid */
- /* for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 1 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to Avg */
- /* for each Active byte */
-
- /* add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry */
- "psllq _ShiftBpp, %%mm6 \n\t" /* shift the mm6 mask to cover */
- /* bytes 2 & 3 */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "psllq _ShiftBpp, %%mm2 \n\t" /* shift data to pos. correctly */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid */
- /* for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 2 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active byte */
-
- /* add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry */
- "psllq _ShiftBpp, %%mm6 \n\t" /* shift the mm6 mask to cover */
- /* bytes 4 & 5 */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "psllq _ShiftBpp, %%mm2 \n\t" /* shift data to pos. correctly */
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both lsb's were == 1 */
- /* (only valid for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 2 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active byte */
-
- /* add 4th active group (Raw(x-bpp)/2) to average with _LBCarry */
- "psllq _ShiftBpp, %%mm6 \n\t" /* shift the mm6 mask to cover */
- /* bytes 6 & 7 */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "psllq _ShiftBpp, %%mm2 \n\t" /* shift data to pos. correctly */
- "addl $8, %%ecx \n\t"
- "movq %%mm3, %%mm1 \n\t" /* now use mm1 for getting */
- /* LBCarrys */
- "pand %%mm2, %%mm1 \n\t" /* get LBCarrys for each byte */
- /* where both */
- /* lsb's were == 1 (only valid */
- /* for active group) */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm2 \n\t" /* add LBCarrys to (Raw(x-bpp)/2) */
- /* for each byte */
- "pand %%mm6, %%mm2 \n\t" /* leave only Active Group 2 */
- /* bytes to add to Avg */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) + LBCarrys to */
- /* Avg for each Active byte */
-
- "cmpl _MMXLength, %%ecx \n\t"
- /* now ready to write back to memory */
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- /* prep Raw(x-bpp) for next loop */
- "movq %%mm0, %%mm2 \n\t" /* mov updated Raws to mm2 */
- "jb avg_2lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 2 bpp */
-
- case 1:
- {
- __asm__ __volatile__ (
- /* re-init address pointers and offset */
-#ifdef __PIC__
- "pushl %%ebx \n\t" /* save Global Offset Table index */
-#endif
- "movl _dif, %%ebx \n\t" /* ebx: x = offset to alignment */
- /* boundary */
-/* preload "movl row, %%edi \n\t" // edi: Avg(x) */
- "cmpl _FullLength, %%ebx \n\t" /* test if offset at end of array */
- "jnb avg_1end \n\t"
- /* do Paeth decode for remaining bytes */
-/* preload "movl prev_row, %%esi \n\t" // esi: Prior(x) */
- "movl %%edi, %%edx \n\t"
-/* preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) */
- "subl %%ecx, %%edx \n\t" /* edx: Raw(x-bpp) */
- "xorl %%ecx, %%ecx \n\t" /* zero ecx before using cl & cx */
- /* in loop below */
- "avg_1lp: \n\t"
- /* Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) */
- "xorl %%eax, %%eax \n\t"
- "movb (%%esi,%%ebx,), %%cl \n\t" /* load cl with Prior(x) */
- "movb (%%edx,%%ebx,), %%al \n\t" /* load al with Raw(x-bpp) */
- "addw %%cx, %%ax \n\t"
- "incl %%ebx \n\t"
- "shrw %%ax \n\t" /* divide by 2 */
- "addb -1(%%edi,%%ebx,), %%al \n\t" /* add Avg(x); -1 to offset */
- /* inc ebx */
- "cmpl _FullLength, %%ebx \n\t" /* check if at end of array */
- "movb %%al, -1(%%edi,%%ebx,) \n\t" /* write back Raw(x); */
- /* mov does not affect flags; -1 to offset inc ebx */
- "jb avg_1lp \n\t"
-
- "avg_1end: \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" /* Global Offset Table index */
-#endif
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), /* ecx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%edx" /* clobber list */
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
- }
- return; /* end 1 bpp */
-
- case 8:
- {
- __asm__ __volatile__ (
- /* re-init address pointers and offset */
- "movl _dif, %%ecx \n\t" /* ecx: x == offset to alignment */
- "movq _LBCarryMask, %%mm5 \n\t" /* boundary */
-/* preload "movl row, %%edi \n\t" // edi: Avg(x) */
- "movq _HBClearMask, %%mm4 \n\t"
-/* preload "movl prev_row, %%esi \n\t" // esi: Prior(x) */
-
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm2 \n\t" /* load previous aligned 8 bytes */
- /* (NO NEED to correct pos. in loop below) */
-
- "avg_8lp: \n\t"
- "movq (%%edi,%%ecx,), %%mm0 \n\t"
- "movq %%mm5, %%mm3 \n\t"
- "movq (%%esi,%%ecx,), %%mm1 \n\t"
- "addl $8, %%ecx \n\t"
- "pand %%mm1, %%mm3 \n\t" /* get lsb for each prev_row byte */
- "psrlq $1, %%mm1 \n\t" /* divide prev_row bytes by 2 */
- "pand %%mm2, %%mm3 \n\t" /* get LBCarrys for each byte */
- /* where both lsb's were == 1 */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm1 \n\t" /* clear invalid bit 7, each byte */
- "paddb %%mm3, %%mm0 \n\t" /* add LBCarrys to Avg, each byte */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7, each byte */
- "paddb %%mm1, %%mm0 \n\t" /* add (Prev_row/2) to Avg, each */
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) to Avg for each */
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm0, -8(%%edi,%%ecx,) \n\t"
- "movq %%mm0, %%mm2 \n\t" /* reuse as Raw(x-bpp) */
- "jb avg_8lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm5 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2"
- , "%mm3", "%mm4", "%mm5"
-#endif
- );
- }
- break; /* end 8 bpp */
-
- default: /* bpp greater than 8 (!= 1,2,3,4,[5],6,[7],8) */
- {
-
-#ifdef PNG_DEBUG
- /* GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED */
- png_debug(1,
- "Internal logic error in pnggccrd (png_read_filter_row_mmx_avg())\n");
-#endif
-
-#if 0
- __asm__ __volatile__ (
- "movq _LBCarryMask, %%mm5 \n\t"
- /* re-init address pointers and offset */
- "movl _dif, %%ebx \n\t" /* ebx: x = offset to */
- /* alignment boundary */
- "movl row, %%edi \n\t" /* edi: Avg(x) */
- "movq _HBClearMask, %%mm4 \n\t"
- "movl %%edi, %%edx \n\t"
- "movl prev_row, %%esi \n\t" /* esi: Prior(x) */
- "subl bpp, %%edx \n\t" /* edx: Raw(x-bpp) */
- "avg_Alp: \n\t"
- "movq (%%edi,%%ebx,), %%mm0 \n\t"
- "movq %%mm5, %%mm3 \n\t"
- "movq (%%esi,%%ebx,), %%mm1 \n\t"
- "pand %%mm1, %%mm3 \n\t" /* get lsb for each prev_row byte */
- "movq (%%edx,%%ebx,), %%mm2 \n\t"
- "psrlq $1, %%mm1 \n\t" /* divide prev_row bytes by 2 */
- "pand %%mm2, %%mm3 \n\t" /* get LBCarrys for each byte */
- /* where both lsb's were == 1 */
- "psrlq $1, %%mm2 \n\t" /* divide raw bytes by 2 */
- "pand %%mm4, %%mm1 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm3, %%mm0 \n\t" /* add LBCarrys to Avg for each */
- /* byte */
- "pand %%mm4, %%mm2 \n\t" /* clear invalid bit 7 of each */
- /* byte */
- "paddb %%mm1, %%mm0 \n\t" /* add (Prev_row/2) to Avg for */
- /* each byte */
- "addl $8, %%ebx \n\t"
- "paddb %%mm2, %%mm0 \n\t" /* add (Raw/2) to Avg for each */
- /* byte */
- "cmpl _MMXLength, %%ebx \n\t"
- "movq %%mm0, -8(%%edi,%%ebx,) \n\t"
- "jb avg_Alp \n\t"
-
- : /* FIXASM: output regs/vars go here, e.g.: "=m" (memory_var) */
-
- : /* FIXASM: input regs, e.g.: "c" (count), "S" (src), "D" (dest) */
-
- : "%ebx", "%edx", "%edi", "%esi" /* CHECKASM: clobber list */
- );
-#endif /* 0 - NEVER REACHED */
- }
- break;
-
- } /* end switch (bpp) */
-
- __asm__ __volatile__ (
- /* MMX acceleration complete; now do clean-up */
- /* check if any remaining bytes left to decode */
-#ifdef __PIC__
- "pushl %%ebx \n\t" /* save index to Global Offset Table */
-#endif
- "movl _MMXLength, %%ebx \n\t" /* ebx: x == offset bytes after MMX */
-/* pre "movl row, %%edi \n\t" */ /* edi: Avg(x) */
- "cmpl _FullLength, %%ebx \n\t" /* test if offset at end of array */
- "jnb avg_end \n\t"
-
- /* do Avg decode for remaining bytes */
-/*pre "movl prev_row, %%esi \n\t" */ /* esi: Prior(x) */
- "movl %%edi, %%edx \n\t"
-/*pre "subl bpp, %%edx \n\t" */ /* (bpp is preloaded into ecx) */
- "subl %%ecx, %%edx \n\t" /* edx: Raw(x-bpp) */
- "xorl %%ecx, %%ecx \n\t" /* zero ecx before using cl & cx below */
-
- "avg_lp2: \n\t"
- /* Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) */
- "xorl %%eax, %%eax \n\t"
- "movb (%%esi,%%ebx,), %%cl \n\t" /* load cl with Prior(x) */
- "movb (%%edx,%%ebx,), %%al \n\t" /* load al with Raw(x-bpp) */
- "addw %%cx, %%ax \n\t"
- "incl %%ebx \n\t"
- "shrw %%ax \n\t" /* divide by 2 */
- "addb -1(%%edi,%%ebx,), %%al \n\t" /* add Avg(x); -1 to offset inc ebx */
- "cmpl _FullLength, %%ebx \n\t" /* check if at end of array */
- "movb %%al, -1(%%edi,%%ebx,) \n\t" /* write back Raw(x) [mov does not */
- "jb avg_lp2 \n\t" /* affect flags; -1 to offset inc ebx] */
-
- "avg_end: \n\t"
- "EMMS \n\t" /* end MMX; prep for poss. FP instrs. */
-#ifdef __PIC__
- "popl %%ebx \n\t" /* restore index to Global Offset Table */
-#endif
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), /* ecx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%edx" /* clobber list */
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
-
-} /* end png_read_filter_row_mmx_avg() */
-#endif
-
-
-
-#ifdef PNG_THREAD_UNSAFE_OK
-/*===========================================================================*/
-/* */
-/* P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H */
-/* */
-/*===========================================================================*/
-
-/* Optimized code for PNG Paeth filter decoder */
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row,
- png_bytep prev_row)
-{
- int bpp;
- int dummy_value_c; /* fix 'forbidden register 2 (cx) was spilled' error */
- int dummy_value_S;
- int dummy_value_D;
-
- bpp = (row_info->pixel_depth + 7) >> 3; /* Get # bytes per pixel */
- _FullLength = row_info->rowbytes; /* # of bytes to filter */
-
- __asm__ __volatile__ (
-#ifdef __PIC__
- "pushl %%ebx \n\t" /* save index to Global Offset Table */
-#endif
- "xorl %%ebx, %%ebx \n\t" /* ebx: x offset */
-/*pre "movl row, %%edi \n\t" */
- "xorl %%edx, %%edx \n\t" /* edx: x-bpp offset */
-/*pre "movl prev_row, %%esi \n\t" */
- "xorl %%eax, %%eax \n\t"
-
- /* Compute the Raw value for the first bpp bytes */
- /* Note: the formula works out to be always */
- /* Paeth(x) = Raw(x) + Prior(x) where x < bpp */
- "paeth_rlp: \n\t"
- "movb (%%edi,%%ebx,), %%al \n\t"
- "addb (%%esi,%%ebx,), %%al \n\t"
- "incl %%ebx \n\t"
-/*pre "cmpl bpp, %%ebx \n\t" (bpp is preloaded into ecx) */
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al, -1(%%edi,%%ebx,) \n\t"
- "jb paeth_rlp \n\t"
- /* get # of bytes to alignment */
- "movl %%edi, _dif \n\t" /* take start of row */
- "addl %%ebx, _dif \n\t" /* add bpp */
- "xorl %%ecx, %%ecx \n\t"
- "addl $0xf, _dif \n\t" /* add 7 + 8 to incr past alignment */
- /* boundary */
- "andl $0xfffffff8, _dif \n\t" /* mask to alignment boundary */
- "subl %%edi, _dif \n\t" /* subtract from start ==> value ebx */
- /* at alignment */
- "jz paeth_go \n\t"
- /* fix alignment */
-
- "paeth_lp1: \n\t"
- "xorl %%eax, %%eax \n\t"
- /* pav = p - a = (a + b - c) - a = b - c */
- "movb (%%esi,%%ebx,), %%al \n\t" /* load Prior(x) into al */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "subl %%ecx, %%eax \n\t" /* subtract Prior(x-bpp) */
- "movl %%eax, _patemp \n\t" /* Save pav for later use */
- "xorl %%eax, %%eax \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movb (%%edi,%%edx,), %%al \n\t" /* load Raw(x-bpp) into al */
- "subl %%ecx, %%eax \n\t" /* subtract Prior(x-bpp) */
- "movl %%eax, %%ecx \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "addl _patemp, %%eax \n\t" /* pcv = pav + pbv */
- /* pc = abs(pcv) */
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_pca \n\t"
- "negl %%eax \n\t" /* reverse sign of neg values */
-
- "paeth_pca: \n\t"
- "movl %%eax, _pctemp \n\t" /* save pc for later use */
- /* pb = abs(pbv) */
- "testl $0x80000000, %%ecx \n\t"
- "jz paeth_pba \n\t"
- "negl %%ecx \n\t" /* reverse sign of neg values */
-
- "paeth_pba: \n\t"
- "movl %%ecx, _pbtemp \n\t" /* save pb for later use */
- /* pa = abs(pav) */
- "movl _patemp, %%eax \n\t"
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_paa \n\t"
- "negl %%eax \n\t" /* reverse sign of neg values */
-
- "paeth_paa: \n\t"
- "movl %%eax, _patemp \n\t" /* save pa for later use */
- /* test if pa <= pb */
- "cmpl %%ecx, %%eax \n\t"
- "jna paeth_abb \n\t"
- /* pa > pb; now test if pb <= pc */
- "cmpl _pctemp, %%ecx \n\t"
- "jna paeth_bbc \n\t"
- /* pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "jmp paeth_paeth \n\t"
-
- "paeth_bbc: \n\t"
- /* pb <= pc; Raw(x) = Paeth(x) + Prior(x) */
- "movb (%%esi,%%ebx,), %%cl \n\t" /* load Prior(x) into cl */
- "jmp paeth_paeth \n\t"
-
- "paeth_abb: \n\t"
- /* pa <= pb; now test if pa <= pc */
- "cmpl _pctemp, %%eax \n\t"
- "jna paeth_abc \n\t"
- /* pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "jmp paeth_paeth \n\t"
-
- "paeth_abc: \n\t"
- /* pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) */
- "movb (%%edi,%%edx,), %%cl \n\t" /* load Raw(x-bpp) into cl */
-
- "paeth_paeth: \n\t"
- "incl %%ebx \n\t"
- "incl %%edx \n\t"
- /* Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 */
- "addb %%cl, -1(%%edi,%%ebx,) \n\t"
- "cmpl _dif, %%ebx \n\t"
- "jb paeth_lp1 \n\t"
-
- "paeth_go: \n\t"
- "movl _FullLength, %%ecx \n\t"
- "movl %%ecx, %%eax \n\t"
- "subl %%ebx, %%eax \n\t" /* subtract alignment fix */
- "andl $0x00000007, %%eax \n\t" /* calc bytes over mult of 8 */
- "subl %%eax, %%ecx \n\t" /* drop over bytes from original length */
- "movl %%ecx, _MMXLength \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" /* restore index to Global Offset Table */
-#endif
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), /* ecx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%edx" /* clobber list */
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
-
- /* now do the math for the rest of the row */
- switch (bpp)
- {
- case 3:
- {
- _ActiveMask.use = 0x0000000000ffffffLL;
- _ActiveMaskEnd.use = 0xffff000000000000LL;
- _ShiftBpp.use = 24; /* == bpp(3) * 8 */
- _ShiftRem.use = 40; /* == 64 - 24 */
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-/* preload "movl row, %%edi \n\t" */
-/* preload "movl prev_row, %%esi \n\t" */
- "pxor %%mm0, %%mm0 \n\t"
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
- "paeth_3lp: \n\t"
- "psrlq _ShiftRem, %%mm1 \n\t" /* shift last 3 bytes to 1st */
- /* 3 bytes */
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) */
- "punpcklbw %%mm0, %%mm1 \n\t" /* unpack High bytes of a */
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" /* prep c=Prior(x-bpp) bytes */
- "punpcklbw %%mm0, %%mm2 \n\t" /* unpack High bytes of b */
- "psrlq _ShiftRem, %%mm3 \n\t" /* shift last 3 bytes to 1st */
- /* 3 bytes */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- "punpcklbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
-
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq (%%esi,%%ecx,), %%mm3 \n\t" /* load c=Prior(x-bpp) */
- "pand _ActiveMask, %%mm7 \n\t"
- "movq %%mm3, %%mm2 \n\t" /* load b=Prior(x) step 1 */
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" /* add Paeth predictor with Raw(x) */
- "punpcklbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- "movq %%mm7, (%%edi,%%ecx,) \n\t" /* write back updated value */
- "movq %%mm7, %%mm1 \n\t" /* now mm1 will be used as */
- /* Raw(x-bpp) */
- /* now do Paeth for 2nd set of bytes (3-5) */
- "psrlq _ShiftBpp, %%mm2 \n\t" /* load b=Prior(x) step 2 */
- "punpcklbw %%mm0, %%mm1 \n\t" /* unpack High bytes of a */
- "pxor %%mm7, %%mm7 \n\t"
- "punpcklbw %%mm0, %%mm2 \n\t" /* unpack High bytes of b */
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = */
- /* pav + pbv = pbv + pav */
- "movq %%mm5, %%mm6 \n\t"
- "paddw %%mm4, %%mm6 \n\t"
-
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm5, %%mm0 \n\t" /* create mask pbv bytes < 0 */
- "pcmpgtw %%mm4, %%mm7 \n\t" /* create mask pav bytes < 0 */
- "pand %%mm5, %%mm0 \n\t" /* only pbv bytes < 0 in mm0 */
- "pand %%mm4, %%mm7 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm0, %%mm5 \n\t"
- "psubw %%mm7, %%mm4 \n\t"
- "psubw %%mm0, %%mm5 \n\t"
- "psubw %%mm7, %%mm4 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) */
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq %%mm2, %%mm3 \n\t" /* load c=Prior(x-bpp) step 1 */
- "pand _ActiveMask, %%mm7 \n\t"
- "punpckhbw %%mm0, %%mm2 \n\t" /* unpack High bytes of b */
- "psllq _ShiftBpp, %%mm7 \n\t" /* shift bytes to 2nd group of */
- /* 3 bytes */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" /* add Paeth predictor with Raw(x) */
- "psllq _ShiftBpp, %%mm3 \n\t" /* load c=Prior(x-bpp) step 2 */
- "movq %%mm7, (%%edi,%%ecx,) \n\t" /* write back updated value */
- "movq %%mm7, %%mm1 \n\t"
- "punpckhbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift bytes */
- /* now mm1 will be used as Raw(x-bpp) */
- /* now do Paeth for 3rd, and final, set of bytes (6-7) */
- "pxor %%mm7, %%mm7 \n\t"
- "punpckhbw %%mm0, %%mm1 \n\t" /* unpack High bytes of a */
- "psubw %%mm3, %%mm4 \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "paddw %%mm5, %%mm6 \n\t"
-
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- /* step ecx to next set of 8 bytes and repeat loop til done */
- "addl $8, %%ecx \n\t"
- "pand _ActiveMaskEnd, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" /* add Paeth predictor with */
- /* Raw(x) */
-
- "cmpl _MMXLength, %%ecx \n\t"
- "pxor %%mm0, %%mm0 \n\t" /* pxor does not affect flags */
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" /* write back updated value */
- /* mm1 will be used as Raw(x-bpp) next loop */
- /* mm3 ready to be used as Prior(x-bpp) next loop */
- "jb paeth_3lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 3 bpp */
-
- case 6:
- //case 7: /* GRR BOGUS */
- //case 5: /* GRR BOGUS */
- {
- _ActiveMask.use = 0x00000000ffffffffLL;
- _ActiveMask2.use = 0xffffffff00000000LL;
- _ShiftBpp.use = bpp << 3; /* == bpp * 8 */
- _ShiftRem.use = 64 - _ShiftBpp.use;
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-/* preload "movl row, %%edi \n\t" */
-/* preload "movl prev_row, %%esi \n\t" */
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
-
- "paeth_6lp: \n\t"
- /* must shift to position Raw(x-bpp) data */
- "psrlq _ShiftRem, %%mm1 \n\t"
- /* do first set of 4 bytes */
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" /* read c=Prior(x-bpp) bytes */
- "punpcklbw %%mm0, %%mm1 \n\t" /* unpack Low bytes of a */
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) */
- "punpcklbw %%mm0, %%mm2 \n\t" /* unpack Low bytes of b */
- /* must shift to position Prior(x-bpp) data */
- "psrlq _ShiftRem, %%mm3 \n\t"
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- "punpcklbw %%mm0, %%mm3 \n\t" /* unpack Low bytes of c */
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" /* load c=Prior(x-bpp) */
- "pand _ActiveMask, %%mm7 \n\t"
- "psrlq _ShiftRem, %%mm3 \n\t"
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) step 1 */
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" /* add Paeth predictor and Raw(x) */
- "movq %%mm2, %%mm6 \n\t"
- "movq %%mm7, (%%edi,%%ecx,) \n\t" /* write back updated value */
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t"
- "movq %%mm7, %%mm5 \n\t"
- "psrlq _ShiftRem, %%mm1 \n\t"
- "por %%mm6, %%mm3 \n\t"
- "psllq _ShiftBpp, %%mm5 \n\t"
- "punpckhbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- "por %%mm5, %%mm1 \n\t"
- /* do second set of 4 bytes */
- "punpckhbw %%mm0, %%mm2 \n\t" /* unpack High bytes of b */
- "punpckhbw %%mm0, %%mm1 \n\t" /* unpack High bytes of a */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- /* step ecx to next set of 8 bytes and repeat loop til done */
- "addl $8, %%ecx \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" /* add Paeth predictor with Raw(x) */
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" /* write back updated value */
- /* mm1 will be used as Raw(x-bpp) next loop */
- "jb paeth_6lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 6 bpp */
-
- case 4:
- {
- _ActiveMask.use = 0x00000000ffffffffLL;
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-/* preload "movl row, %%edi \n\t" */
-/* preload "movl prev_row, %%esi \n\t" */
- "pxor %%mm0, %%mm0 \n\t"
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t" /* only time should need to read */
- /* a=Raw(x-bpp) bytes */
- "paeth_4lp: \n\t"
- /* do first set of 4 bytes */
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" /* read c=Prior(x-bpp) bytes */
- "punpckhbw %%mm0, %%mm1 \n\t" /* unpack Low bytes of a */
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) */
- "punpcklbw %%mm0, %%mm2 \n\t" /* unpack High bytes of b */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- "punpckhbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq (%%esi,%%ecx,), %%mm3 \n\t" /* load c=Prior(x-bpp) */
- "pand _ActiveMask, %%mm7 \n\t"
- "movq %%mm3, %%mm2 \n\t" /* load b=Prior(x) step 1 */
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" /* add Paeth predictor with Raw(x) */
- "punpcklbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- "movq %%mm7, (%%edi,%%ecx,) \n\t" /* write back updated value */
- "movq %%mm7, %%mm1 \n\t" /* now mm1 will be used as Raw(x-bpp) */
- /* do second set of 4 bytes */
- "punpckhbw %%mm0, %%mm2 \n\t" /* unpack Low bytes of b */
- "punpcklbw %%mm0, %%mm1 \n\t" /* unpack Low bytes of a */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- /* step ecx to next set of 8 bytes and repeat loop til done */
- "addl $8, %%ecx \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" /* add predictor with Raw(x) */
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" /* write back updated value */
- /* mm1 will be used as Raw(x-bpp) next loop */
- "jb paeth_4lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 4 bpp */
-
- case 8: /* bpp == 8 */
- {
- _ActiveMask.use = 0x00000000ffffffffLL;
-
- __asm__ __volatile__ (
- "movl _dif, %%ecx \n\t"
-/* preload "movl row, %%edi \n\t" */
-/* preload "movl prev_row, %%esi \n\t" */
- "pxor %%mm0, %%mm0 \n\t"
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t" /* only time should need to read */
- /* a=Raw(x-bpp) bytes */
- "paeth_8lp: \n\t"
- /* do first set of 4 bytes */
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" /* read c=Prior(x-bpp) bytes */
- "punpcklbw %%mm0, %%mm1 \n\t" /* unpack Low bytes of a */
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) */
- "punpcklbw %%mm0, %%mm2 \n\t" /* unpack Low bytes of b */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- "punpcklbw %%mm0, %%mm3 \n\t" /* unpack Low bytes of c */
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "packuswb %%mm1, %%mm7 \n\t"
- "movq -8(%%esi,%%ecx,), %%mm3 \n\t" /* read c=Prior(x-bpp) bytes */
- "pand _ActiveMask, %%mm7 \n\t"
- "movq (%%esi,%%ecx,), %%mm2 \n\t" /* load b=Prior(x) */
- "paddb (%%edi,%%ecx,), %%mm7 \n\t" /* add Paeth predictor with Raw(x) */
- "punpckhbw %%mm0, %%mm3 \n\t" /* unpack High bytes of c */
- "movq %%mm7, (%%edi,%%ecx,) \n\t" /* write back updated value */
- "movq -8(%%edi,%%ecx,), %%mm1 \n\t" /* read a=Raw(x-bpp) bytes */
-
- /* do second set of 4 bytes */
- "punpckhbw %%mm0, %%mm2 \n\t" /* unpack High bytes of b */
- "punpckhbw %%mm0, %%mm1 \n\t" /* unpack High bytes of a */
- /* pav = p - a = (a + b - c) - a = b - c */
- "movq %%mm2, %%mm4 \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movq %%mm1, %%mm5 \n\t"
- "psubw %%mm3, %%mm4 \n\t"
- "pxor %%mm7, %%mm7 \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "movq %%mm4, %%mm6 \n\t"
- "psubw %%mm3, %%mm5 \n\t"
- /* pa = abs(p-a) = abs(pav) */
- /* pb = abs(p-b) = abs(pbv) */
- /* pc = abs(p-c) = abs(pcv) */
- "pcmpgtw %%mm4, %%mm0 \n\t" /* create mask pav bytes < 0 */
- "paddw %%mm5, %%mm6 \n\t"
- "pand %%mm4, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "pcmpgtw %%mm5, %%mm7 \n\t" /* create mask pbv bytes < 0 */
- "psubw %%mm0, %%mm4 \n\t"
- "pand %%mm5, %%mm7 \n\t" /* only pbv bytes < 0 in mm0 */
- "psubw %%mm0, %%mm4 \n\t"
- "psubw %%mm7, %%mm5 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- "pcmpgtw %%mm6, %%mm0 \n\t" /* create mask pcv bytes < 0 */
- "pand %%mm6, %%mm0 \n\t" /* only pav bytes < 0 in mm7 */
- "psubw %%mm7, %%mm5 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- /* test pa <= pb */
- "movq %%mm4, %%mm7 \n\t"
- "psubw %%mm0, %%mm6 \n\t"
- "pcmpgtw %%mm5, %%mm7 \n\t" /* pa > pb? */
- "movq %%mm7, %%mm0 \n\t"
- /* use mm7 mask to merge pa & pb */
- "pand %%mm7, %%mm5 \n\t"
- /* use mm0 mask copy to merge a & b */
- "pand %%mm0, %%mm2 \n\t"
- "pandn %%mm4, %%mm7 \n\t"
- "pandn %%mm1, %%mm0 \n\t"
- "paddw %%mm5, %%mm7 \n\t"
- "paddw %%mm2, %%mm0 \n\t"
- /* test ((pa <= pb)? pa:pb) <= pc */
- "pcmpgtw %%mm6, %%mm7 \n\t" /* pab > pc? */
- "pxor %%mm1, %%mm1 \n\t"
- "pand %%mm7, %%mm3 \n\t"
- "pandn %%mm0, %%mm7 \n\t"
- "pxor %%mm1, %%mm1 \n\t"
- "paddw %%mm3, %%mm7 \n\t"
- "pxor %%mm0, %%mm0 \n\t"
- /* step ecx to next set of 8 bytes and repeat loop til done */
- "addl $8, %%ecx \n\t"
- "packuswb %%mm7, %%mm1 \n\t"
- "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" /* add Paeth predictor with Raw(x) */
- "cmpl _MMXLength, %%ecx \n\t"
- "movq %%mm1, -8(%%edi,%%ecx,) \n\t" /* write back updated value */
- /* mm1 will be used as Raw(x-bpp) next loop */
- "jb paeth_8lp \n\t"
-
- : "=S" (dummy_value_S), /* output regs (dummy) */
- "=D" (dummy_value_D)
-
- : "0" (prev_row), /* esi // input regs */
- "1" (row) /* edi */
-
- : "%ecx" /* clobber list */
-#if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break; /* end 8 bpp */
-
- case 1: /* bpp = 1 */
- case 2: /* bpp = 2 */
- default: /* bpp > 8 */
- {
- __asm__ __volatile__ (
-#ifdef __PIC__
- "pushl %%ebx \n\t" /* save Global Offset Table index */
-#endif
- "movl _dif, %%ebx \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jnb paeth_dend \n\t"
-
-/* preload "movl row, %%edi \n\t" */
-/* preload "movl prev_row, %%esi \n\t" */
- /* do Paeth decode for remaining bytes */
- "movl %%ebx, %%edx \n\t"
-/* preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) */
- "subl %%ecx, %%edx \n\t" /* edx = ebx - bpp */
- "xorl %%ecx, %%ecx \n\t" /* zero ecx before using cl & cx */
-
- "paeth_dlp: \n\t"
- "xorl %%eax, %%eax \n\t"
- /* pav = p - a = (a + b - c) - a = b - c */
- "movb (%%esi,%%ebx,), %%al \n\t" /* load Prior(x) into al */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "subl %%ecx, %%eax \n\t" /* subtract Prior(x-bpp) */
- "movl %%eax, _patemp \n\t" /* Save pav for later use */
- "xorl %%eax, %%eax \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movb (%%edi,%%edx,), %%al \n\t" /* load Raw(x-bpp) into al */
- "subl %%ecx, %%eax \n\t" /* subtract Prior(x-bpp) */
- "movl %%eax, %%ecx \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "addl _patemp, %%eax \n\t" /* pcv = pav + pbv */
- /* pc = abs(pcv) */
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_dpca \n\t"
- "negl %%eax \n\t" /* reverse sign of neg values */
-
- "paeth_dpca: \n\t"
- "movl %%eax, _pctemp \n\t" /* save pc for later use */
- /* pb = abs(pbv) */
- "testl $0x80000000, %%ecx \n\t"
- "jz paeth_dpba \n\t"
- "negl %%ecx \n\t" /* reverse sign of neg values */
-
- "paeth_dpba: \n\t"
- "movl %%ecx, _pbtemp \n\t" /* save pb for later use */
- /* pa = abs(pav) */
- "movl _patemp, %%eax \n\t"
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_dpaa \n\t"
- "negl %%eax \n\t" /* reverse sign of neg values */
-
- "paeth_dpaa: \n\t"
- "movl %%eax, _patemp \n\t" /* save pa for later use */
- /* test if pa <= pb */
- "cmpl %%ecx, %%eax \n\t"
- "jna paeth_dabb \n\t"
- /* pa > pb; now test if pb <= pc */
- "cmpl _pctemp, %%ecx \n\t"
- "jna paeth_dbbc \n\t"
- /* pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "jmp paeth_dpaeth \n\t"
-
- "paeth_dbbc: \n\t"
- /* pb <= pc; Raw(x) = Paeth(x) + Prior(x) */
- "movb (%%esi,%%ebx,), %%cl \n\t" /* load Prior(x) into cl */
- "jmp paeth_dpaeth \n\t"
-
- "paeth_dabb: \n\t"
- /* pa <= pb; now test if pa <= pc */
- "cmpl _pctemp, %%eax \n\t"
- "jna paeth_dabc \n\t"
- /* pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "jmp paeth_dpaeth \n\t"
-
- "paeth_dabc: \n\t"
- /* pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) */
- "movb (%%edi,%%edx,), %%cl \n\t" /* load Raw(x-bpp) into cl */
-
- "paeth_dpaeth: \n\t"
- "incl %%ebx \n\t"
- "incl %%edx \n\t"
- /* Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 */
- "addb %%cl, -1(%%edi,%%ebx,) \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jb paeth_dlp \n\t"
-
- "paeth_dend: \n\t"
-#ifdef __PIC__
- "popl %%ebx \n\t" /* index to Global Offset Table */
-#endif
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), /* ecx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%edx" /* clobber list */
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
- }
- return; /* No need to go further with this one */
-
- } /* end switch (bpp) */
-
- __asm__ __volatile__ (
- /* MMX acceleration complete; now do clean-up */
- /* check if any remaining bytes left to decode */
-#ifdef __PIC__
- "pushl %%ebx \n\t" /* save index to Global Offset Table */
-#endif
- "movl _MMXLength, %%ebx \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jnb paeth_end \n\t"
-/*pre "movl row, %%edi \n\t" */
-/*pre "movl prev_row, %%esi \n\t" */
- /* do Paeth decode for remaining bytes */
- "movl %%ebx, %%edx \n\t"
-/*pre "subl bpp, %%edx \n\t" */ /* (bpp is preloaded into ecx) */
- "subl %%ecx, %%edx \n\t" /* edx = ebx - bpp */
- "xorl %%ecx, %%ecx \n\t" /* zero ecx before using cl & cx below */
-
- "paeth_lp2: \n\t"
- "xorl %%eax, %%eax \n\t"
- /* pav = p - a = (a + b - c) - a = b - c */
- "movb (%%esi,%%ebx,), %%al \n\t" /* load Prior(x) into al */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "subl %%ecx, %%eax \n\t" /* subtract Prior(x-bpp) */
- "movl %%eax, _patemp \n\t" /* Save pav for later use */
- "xorl %%eax, %%eax \n\t"
- /* pbv = p - b = (a + b - c) - b = a - c */
- "movb (%%edi,%%edx,), %%al \n\t" /* load Raw(x-bpp) into al */
- "subl %%ecx, %%eax \n\t" /* subtract Prior(x-bpp) */
- "movl %%eax, %%ecx \n\t"
- /* pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv */
- "addl _patemp, %%eax \n\t" /* pcv = pav + pbv */
- /* pc = abs(pcv) */
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_pca2 \n\t"
- "negl %%eax \n\t" /* reverse sign of neg values */
-
- "paeth_pca2: \n\t"
- "movl %%eax, _pctemp \n\t" /* save pc for later use */
- /* pb = abs(pbv) */
- "testl $0x80000000, %%ecx \n\t"
- "jz paeth_pba2 \n\t"
- "negl %%ecx \n\t" /* reverse sign of neg values */
-
- "paeth_pba2: \n\t"
- "movl %%ecx, _pbtemp \n\t" /* save pb for later use */
- /* pa = abs(pav) */
- "movl _patemp, %%eax \n\t"
- "testl $0x80000000, %%eax \n\t"
- "jz paeth_paa2 \n\t"
- "negl %%eax \n\t" /* reverse sign of neg values */
-
- "paeth_paa2: \n\t"
- "movl %%eax, _patemp \n\t" /* save pa for later use */
- /* test if pa <= pb */
- "cmpl %%ecx, %%eax \n\t"
- "jna paeth_abb2 \n\t"
- /* pa > pb; now test if pb <= pc */
- "cmpl _pctemp, %%ecx \n\t"
- "jna paeth_bbc2 \n\t"
- /* pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "jmp paeth_paeth2 \n\t"
-
- "paeth_bbc2: \n\t"
- /* pb <= pc; Raw(x) = Paeth(x) + Prior(x) */
- "movb (%%esi,%%ebx,), %%cl \n\t" /* load Prior(x) into cl */
- "jmp paeth_paeth2 \n\t"
-
- "paeth_abb2: \n\t"
- /* pa <= pb; now test if pa <= pc */
- "cmpl _pctemp, %%eax \n\t"
- "jna paeth_abc2 \n\t"
- /* pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) */
- "movb (%%esi,%%edx,), %%cl \n\t" /* load Prior(x-bpp) into cl */
- "jmp paeth_paeth2 \n\t"
-
- "paeth_abc2: \n\t"
- /* pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) */
- "movb (%%edi,%%edx,), %%cl \n\t" /* load Raw(x-bpp) into cl */
-
- "paeth_paeth2: \n\t"
- "incl %%ebx \n\t"
- "incl %%edx \n\t"
- /* Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 */
- "addb %%cl, -1(%%edi,%%ebx,) \n\t"
- "cmpl _FullLength, %%ebx \n\t"
- "jb paeth_lp2 \n\t"
-
- "paeth_end: \n\t"
- "EMMS \n\t" /* end MMX; prep for poss. FP instrs. */
-#ifdef __PIC__
- "popl %%ebx \n\t" /* restore index to Global Offset Table */
-#endif
-
- : "=c" (dummy_value_c), /* output regs (dummy) */
- "=S" (dummy_value_S),
- "=D" (dummy_value_D)
-
- : "0" (bpp), /* ecx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%edx" /* clobber list (no input regs!) */
-#ifndef __PIC__
- , "%ebx"
-#endif
- );
-
-} /* end png_read_filter_row_mmx_paeth() */
-#endif
-
-
-
-
-#ifdef PNG_THREAD_UNSAFE_OK
-/*===========================================================================*/
-/* */
-/* P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B */
-/* */
-/*===========================================================================*/
-
-/* Optimized code for PNG Sub filter decoder */
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row)
-{
- int bpp;
- int dummy_value_a;
- int dummy_value_D;
-
- bpp = (row_info->pixel_depth + 7) >> 3; /* calc number of bytes per pixel */
- _FullLength = row_info->rowbytes - bpp; /* number of bytes to filter */
-
- __asm__ __volatile__ (
-/*pre "movl row, %%edi \n\t" */
- "movl %%edi, %%esi \n\t" /* lp = row */
-/*pre "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
-/*irr "xorl %%eax, %%eax \n\t" */
- /* get # of bytes to alignment */
- "movl %%edi, _dif \n\t" /* take start of row */
- "addl $0xf, _dif \n\t" /* add 7 + 8 to incr past */
- /* alignment boundary */
- "xorl %%ecx, %%ecx \n\t"
- "andl $0xfffffff8, _dif \n\t" /* mask to alignment boundary */
- "subl %%edi, _dif \n\t" /* subtract from start ==> value */
- "jz sub_go \n\t" /* ecx at alignment */
-
- "sub_lp1: \n\t" /* fix alignment */
- "movb (%%esi,%%ecx,), %%al \n\t"
- "addb %%al, (%%edi,%%ecx,) \n\t"
- "incl %%ecx \n\t"
- "cmpl _dif, %%ecx \n\t"
- "jb sub_lp1 \n\t"
-
- "sub_go: \n\t"
- "movl _FullLength, %%eax \n\t"
- "movl %%eax, %%edx \n\t"
- "subl %%ecx, %%edx \n\t" /* subtract alignment fix */
- "andl $0x00000007, %%edx \n\t" /* calc bytes over mult of 8 */
- "subl %%edx, %%eax \n\t" /* drop over bytes from length */
- "movl %%eax, _MMXLength \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%esi", "%ecx", "%edx" // clobber list
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
-
- /* now do the math for the rest of the row */
- switch (bpp)
- {
- case 3:
- {
- _ActiveMask.use = 0x0000ffffff000000LL;
- _ShiftBpp.use = 24; /* == 3 * 8 */
- _ShiftRem.use = 40; /* == 64 - 24 */
-
- __asm__ __volatile__ (
-/* preload "movl row, %%edi \n\t" */
- "movq _ActiveMask, %%mm7 \n\t" /* load _ActiveMask for 2nd */
- /* active byte group */
- "movl %%edi, %%esi \n\t" /* lp = row */
-/* preload "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
- "movq %%mm7, %%mm6 \n\t"
- "movl _dif, %%edx \n\t"
- "psllq _ShiftBpp, %%mm6 \n\t" /* move mask in mm6 to cover */
- /* 3rd active byte group */
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%edx,), %%mm1 \n\t"
-
- "sub_3lp: \n\t" /* shift data for adding first */
- "psrlq _ShiftRem, %%mm1 \n\t" /* bpp bytes (no need for mask; */
- /* shift clears inactive bytes) */
- /* add 1st active group */
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- /* add 2nd active group */
- "movq %%mm0, %%mm1 \n\t" /* mov updated Raws to mm1 */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift data to pos. correctly */
- "pand %%mm7, %%mm1 \n\t" /* mask to use 2nd active group */
- "paddb %%mm1, %%mm0 \n\t"
-
- /* add 3rd active group */
- "movq %%mm0, %%mm1 \n\t" /* mov updated Raws to mm1 */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift data to pos. correctly */
- "pand %%mm6, %%mm1 \n\t" /* mask to use 3rd active group */
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" /* write updated Raws to array */
- "movq %%mm0, %%mm1 \n\t" /* prep 1st add at top of loop */
- "jb sub_3lp \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%edx", "%esi" /* clobber list */
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm6", "%mm7"
-#endif
- );
- }
- break;
-
- case 1:
- {
- __asm__ __volatile__ (
- "movl _dif, %%edx \n\t"
-/* preload "movl row, %%edi \n\t" */
- "cmpl _FullLength, %%edx \n\t"
- "jnb sub_1end \n\t"
- "movl %%edi, %%esi \n\t" /* lp = row */
- "xorl %%eax, %%eax \n\t"
-/* preload "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
-
- "sub_1lp: \n\t"
- "movb (%%esi,%%edx,), %%al \n\t"
- "addb %%al, (%%edi,%%edx,) \n\t"
- "incl %%edx \n\t"
- "cmpl _FullLength, %%edx \n\t"
- "jb sub_1lp \n\t"
-
- "sub_1end: \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%edx", "%esi" /* clobber list */
- );
- }
- return;
-
- case 6:
- case 4:
- //case 7: /* GRR BOGUS */
- //case 5: /* GRR BOGUS */
- {
- _ShiftBpp.use = bpp << 3;
- _ShiftRem.use = 64 - _ShiftBpp.use;
-
- __asm__ __volatile__ (
-/* preload "movl row, %%edi \n\t" */
- "movl _dif, %%edx \n\t"
- "movl %%edi, %%esi \n\t" /* lp = row */
-/* preload "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
-
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%edx,), %%mm1 \n\t"
-
- "sub_4lp: \n\t" /* shift data for adding first */
- "psrlq _ShiftRem, %%mm1 \n\t" /* bpp bytes (no need for mask; */
- /* shift clears inactive bytes) */
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- /* add 2nd active group */
- "movq %%mm0, %%mm1 \n\t" /* mov updated Raws to mm1 */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift data to pos. correctly */
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t"
- "movq %%mm0, %%mm1 \n\t" /* prep 1st add at top of loop */
- "jb sub_4lp \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%edx", "%esi" /* clobber list */
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1"
-#endif
- );
- }
- break;
-
- case 2:
- {
- _ActiveMask.use = 0x00000000ffff0000LL;
- _ShiftBpp.use = 16; /* == 2 * 8 */
- _ShiftRem.use = 48; /* == 64 - 16 */
-
- __asm__ __volatile__ (
- "movq _ActiveMask, %%mm7 \n\t" /* load _ActiveMask for 2nd */
- /* active byte group */
- "movl _dif, %%edx \n\t"
- "movq %%mm7, %%mm6 \n\t"
-/* preload "movl row, %%edi \n\t" */
- "psllq _ShiftBpp, %%mm6 \n\t" /* move mask in mm6 to cover */
- /* 3rd active byte group */
- "movl %%edi, %%esi \n\t" /* lp = row */
- "movq %%mm6, %%mm5 \n\t"
-/* preload "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
- "psllq _ShiftBpp, %%mm5 \n\t" /* move mask in mm5 to cover */
- /* 4th active byte group */
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%edx,), %%mm1 \n\t"
-
- "sub_2lp: \n\t" /* shift data for adding first */
- "psrlq _ShiftRem, %%mm1 \n\t" /* bpp bytes (no need for mask; */
- /* shift clears inactive bytes) */
- /* add 1st active group */
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
-
- /* add 2nd active group */
- "movq %%mm0, %%mm1 \n\t" /* mov updated Raws to mm1 */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift data to pos. correctly */
- "pand %%mm7, %%mm1 \n\t" /* mask to use 2nd active group */
- "paddb %%mm1, %%mm0 \n\t"
-
- /* add 3rd active group */
- "movq %%mm0, %%mm1 \n\t" /* mov updated Raws to mm1 */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift data to pos. correctly */
- "pand %%mm6, %%mm1 \n\t" /* mask to use 3rd active group */
- "paddb %%mm1, %%mm0 \n\t"
-
- /* add 4th active group */
- "movq %%mm0, %%mm1 \n\t" /* mov updated Raws to mm1 */
- "psllq _ShiftBpp, %%mm1 \n\t" /* shift data to pos. correctly */
- "pand %%mm5, %%mm1 \n\t" /* mask to use 4th active group */
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" /* write updated Raws to array */
- "movq %%mm0, %%mm1 \n\t" /* prep 1st add at top of loop */
- "jb sub_2lp \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%edx", "%esi" /* clobber list */
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break;
-
- case 8:
- {
- __asm__ __volatile__ (
-/* preload "movl row, %%edi \n\t" */
- "movl _dif, %%edx \n\t"
- "movl %%edi, %%esi \n\t" /* lp = row */
-/* preload "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
- "movl _MMXLength, %%ecx \n\t"
-
- /* prime the pump: load the first Raw(x-bpp) data set */
- "movq -8(%%edi,%%edx,), %%mm7 \n\t"
- "andl $0x0000003f, %%ecx \n\t" /* calc bytes over mult of 64 */
-
- "sub_8lp: \n\t"
- "movq (%%edi,%%edx,), %%mm0 \n\t" /* load Sub(x) for 1st 8 bytes */
- "paddb %%mm7, %%mm0 \n\t"
- "movq 8(%%edi,%%edx,), %%mm1 \n\t" /* load Sub(x) for 2nd 8 bytes */
- "movq %%mm0, (%%edi,%%edx,) \n\t" /* write Raw(x) for 1st 8 bytes */
-
- /* Now mm0 will be used as Raw(x-bpp) for the 2nd group of 8 bytes. */
- /* This will be repeated for each group of 8 bytes with the 8th */
- /* group being used as the Raw(x-bpp) for the 1st group of the */
- /* next loop. */
-
- "paddb %%mm0, %%mm1 \n\t"
- "movq 16(%%edi,%%edx,), %%mm2 \n\t" /* load Sub(x) for 3rd 8 bytes */
- "movq %%mm1, 8(%%edi,%%edx,) \n\t" /* write Raw(x) for 2nd 8 bytes */
- "paddb %%mm1, %%mm2 \n\t"
- "movq 24(%%edi,%%edx,), %%mm3 \n\t" /* load Sub(x) for 4th 8 bytes */
- "movq %%mm2, 16(%%edi,%%edx,) \n\t" /* write Raw(x) for 3rd 8 bytes */
- "paddb %%mm2, %%mm3 \n\t"
- "movq 32(%%edi,%%edx,), %%mm4 \n\t" /* load Sub(x) for 5th 8 bytes */
- "movq %%mm3, 24(%%edi,%%edx,) \n\t" /* write Raw(x) for 4th 8 bytes */
- "paddb %%mm3, %%mm4 \n\t"
- "movq 40(%%edi,%%edx,), %%mm5 \n\t" /* load Sub(x) for 6th 8 bytes */
- "movq %%mm4, 32(%%edi,%%edx,) \n\t" /* write Raw(x) for 5th 8 bytes */
- "paddb %%mm4, %%mm5 \n\t"
- "movq 48(%%edi,%%edx,), %%mm6 \n\t" /* load Sub(x) for 7th 8 bytes */
- "movq %%mm5, 40(%%edi,%%edx,) \n\t" /* write Raw(x) for 6th 8 bytes */
- "paddb %%mm5, %%mm6 \n\t"
- "movq 56(%%edi,%%edx,), %%mm7 \n\t" /* load Sub(x) for 8th 8 bytes */
- "movq %%mm6, 48(%%edi,%%edx,) \n\t" /* write Raw(x) for 7th 8 bytes */
- "addl $64, %%edx \n\t"
- "paddb %%mm6, %%mm7 \n\t"
- "cmpl %%ecx, %%edx \n\t"
- "movq %%mm7, -8(%%edi,%%edx,) \n\t" /* write Raw(x) for 8th 8 bytes */
- "jb sub_8lp \n\t"
-
- "cmpl _MMXLength, %%edx \n\t"
- "jnb sub_8lt8 \n\t"
-
- "sub_8lpA: \n\t"
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "addl $8, %%edx \n\t"
- "paddb %%mm7, %%mm0 \n\t"
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" /* -8 to offset early addl edx */
- "movq %%mm0, %%mm7 \n\t" /* move calculated Raw(x) data */
- /* to mm1 to be new Raw(x-bpp) */
- /* for next loop */
- "jb sub_8lpA \n\t"
-
- "sub_8lt8: \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%ecx", "%edx", "%esi" /* clobber list */
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
- }
- break;
-
- default: /* bpp greater than 8 bytes GRR BOGUS */
- {
- __asm__ __volatile__ (
- "movl _dif, %%edx \n\t"
-/* preload "movl row, %%edi \n\t" */
- "movl %%edi, %%esi \n\t" /* lp = row */
-/* preload "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
-
- "sub_Alp: \n\t"
- "movq (%%edi,%%edx,), %%mm0 \n\t"
- "movq (%%esi,%%edx,), %%mm1 \n\t"
- "addl $8, %%edx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "cmpl _MMXLength, %%edx \n\t"
- "movq %%mm0, -8(%%edi,%%edx,) \n\t" /* mov does not affect flags; */
- /* -8 to offset addl edx */
- "jb sub_Alp \n\t"
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%edx", "%esi" /* clobber list */
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1"
-#endif
- );
- }
- break;
-
- } /* end switch (bpp) */
-
- __asm__ __volatile__ (
- "movl _MMXLength, %%edx \n\t"
-/* pre "movl row, %%edi \n\t" */
- "cmpl _FullLength, %%edx \n\t"
- "jnb sub_end \n\t"
-
- "movl %%edi, %%esi \n\t" /* lp = row */
-/* pre "movl bpp, %%eax \n\t" */
- "addl %%eax, %%edi \n\t" /* rp = row + bpp */
- "xorl %%eax, %%eax \n\t"
-
- "sub_lp2: \n\t"
- "movb (%%esi,%%edx,), %%al \n\t"
- "addb %%al, (%%edi,%%edx,) \n\t"
- "incl %%edx \n\t"
- "cmpl _FullLength, %%edx \n\t"
- "jb sub_lp2 \n\t"
-
- "sub_end: \n\t"
- "EMMS \n\t" /* end MMX instructions */
-
- : "=a" (dummy_value_a), /* 0 // output regs (dummy) */
- "=D" (dummy_value_D) /* 1 */
-
- : "0" (bpp), /* eax // input regs */
- "1" (row) /* edi */
-
- : "%edx", "%esi" /* clobber list */
- );
-
-} /* end of png_read_filter_row_mmx_sub() */
-#endif
-
-
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ R E A D _ F I L T E R _ R O W _ M M X _ U P */
-/* */
-/*===========================================================================*/
-
-/* Optimized code for PNG Up filter decoder */
-
-static void /* PRIVATE */
-png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row,
- png_bytep prev_row)
-{
- png_uint_32 len;
- int dummy_value_d; /* fix 'forbidden register 3 (dx) was spilled' error */
- int dummy_value_S;
- int dummy_value_D;
-
- len = row_info->rowbytes; /* number of bytes to filter */
-
- __asm__ __volatile__ (
-/* pre "movl row, %%edi \n\t" */
- /* get # of bytes to alignment */
-#ifdef __PIC__
- "pushl %%ebx \n\t"
-#endif
- "movl %%edi, %%ecx \n\t"
- "xorl %%ebx, %%ebx \n\t"
- "addl $0x7, %%ecx \n\t"
- "xorl %%eax, %%eax \n\t"
- "andl $0xfffffff8, %%ecx \n\t"
-/* pre "movl prev_row, %%esi \n\t" */
- "subl %%edi, %%ecx \n\t"
- "jz up_go \n\t"
-
- "up_lp1: \n\t" /* fix alignment */
- "movb (%%edi,%%ebx,), %%al \n\t"
- "addb (%%esi,%%ebx,), %%al \n\t"
- "incl %%ebx \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al, -1(%%edi,%%ebx,) \n\t" /* mov does not affect flags; -1 to */
- "jb up_lp1 \n\t" /* offset incl ebx */
-
- "up_go: \n\t"
-/* pre "movl len, %%edx \n\t" */
- "movl %%edx, %%ecx \n\t"
- "subl %%ebx, %%edx \n\t" /* subtract alignment fix */
- "andl $0x0000003f, %%edx \n\t" /* calc bytes over mult of 64 */
- "subl %%edx, %%ecx \n\t" /* drop over bytes from length */
-
- /* unrolled loop - use all MMX registers and interleave to reduce */
- /* number of branch instructions (loops) and reduce partial stalls */
- "up_loop: \n\t"
- "movq (%%esi,%%ebx,), %%mm1 \n\t"
- "movq (%%edi,%%ebx,), %%mm0 \n\t"
- "movq 8(%%esi,%%ebx,), %%mm3 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "movq 8(%%edi,%%ebx,), %%mm2 \n\t"
- "movq %%mm0, (%%edi,%%ebx,) \n\t"
- "paddb %%mm3, %%mm2 \n\t"
- "movq 16(%%esi,%%ebx,), %%mm5 \n\t"
- "movq %%mm2, 8(%%edi,%%ebx,) \n\t"
- "movq 16(%%edi,%%ebx,), %%mm4 \n\t"
- "movq 24(%%esi,%%ebx,), %%mm7 \n\t"
- "paddb %%mm5, %%mm4 \n\t"
- "movq 24(%%edi,%%ebx,), %%mm6 \n\t"
- "movq %%mm4, 16(%%edi,%%ebx,) \n\t"
- "paddb %%mm7, %%mm6 \n\t"
- "movq 32(%%esi,%%ebx,), %%mm1 \n\t"
- "movq %%mm6, 24(%%edi,%%ebx,) \n\t"
- "movq 32(%%edi,%%ebx,), %%mm0 \n\t"
- "movq 40(%%esi,%%ebx,), %%mm3 \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "movq 40(%%edi,%%ebx,), %%mm2 \n\t"
- "movq %%mm0, 32(%%edi,%%ebx,) \n\t"
- "paddb %%mm3, %%mm2 \n\t"
- "movq 48(%%esi,%%ebx,), %%mm5 \n\t"
- "movq %%mm2, 40(%%edi,%%ebx,) \n\t"
- "movq 48(%%edi,%%ebx,), %%mm4 \n\t"
- "movq 56(%%esi,%%ebx,), %%mm7 \n\t"
- "paddb %%mm5, %%mm4 \n\t"
- "movq 56(%%edi,%%ebx,), %%mm6 \n\t"
- "movq %%mm4, 48(%%edi,%%ebx,) \n\t"
- "addl $64, %%ebx \n\t"
- "paddb %%mm7, %%mm6 \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movq %%mm6, -8(%%edi,%%ebx,) \n\t" /* (+56)movq does not affect flags; */
- "jb up_loop \n\t" /* -8 to offset addl ebx */
-
- "cmpl $0, %%edx \n\t" /* test for bytes over mult of 64 */
- "jz up_end \n\t"
-
- "cmpl $8, %%edx \n\t" /* test for less than 8 bytes */
- "jb up_lt8 \n\t" /* [added by lcreeve@netins.net] */
-
- "addl %%edx, %%ecx \n\t"
- "andl $0x00000007, %%edx \n\t" /* calc bytes over mult of 8 */
- "subl %%edx, %%ecx \n\t" /* drop over bytes from length */
- "jz up_lt8 \n\t"
-
- "up_lpA: \n\t" /* use MMX regs to update 8 bytes sim. */
- "movq (%%esi,%%ebx,), %%mm1 \n\t"
- "movq (%%edi,%%ebx,), %%mm0 \n\t"
- "addl $8, %%ebx \n\t"
- "paddb %%mm1, %%mm0 \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movq %%mm0, -8(%%edi,%%ebx,) \n\t" /* movq does not affect flags; -8 to */
- "jb up_lpA \n\t" /* offset add ebx */
- "cmpl $0, %%edx \n\t" /* test for bytes over mult of 8 */
- "jz up_end \n\t"
-
- "up_lt8: \n\t"
- "xorl %%eax, %%eax \n\t"
- "addl %%edx, %%ecx \n\t" /* move over byte count into counter */
-
- "up_lp2: \n\t" /* use x86 regs for remaining bytes */
- "movb (%%edi,%%ebx,), %%al \n\t"
- "addb (%%esi,%%ebx,), %%al \n\t"
- "incl %%ebx \n\t"
- "cmpl %%ecx, %%ebx \n\t"
- "movb %%al, -1(%%edi,%%ebx,) \n\t" /* mov does not affect flags; -1 to */
- "jb up_lp2 \n\t" /* offset inc ebx */
-
- "up_end: \n\t"
- "EMMS \n\t" /* conversion of filtered row complete */
-#ifdef __PIC__
- "popl %%ebx \n\t"
-#endif
-
- : "=d" (dummy_value_d), /* 0 // output regs (dummy) */
- "=S" (dummy_value_S), /* 1 */
- "=D" (dummy_value_D) /* 2 */
-
- : "0" (len), /* edx // input regs */
- "1" (prev_row), /* esi */
- "2" (row) /* edi */
-
- : "%eax", "%ecx" // clobber list (no input regs!)
-#ifndef __PIC__
- , "%ebx"
-#endif
-
-#if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */
- , "%mm0", "%mm1", "%mm2", "%mm3"
- , "%mm4", "%mm5", "%mm6", "%mm7"
-#endif
- );
-
-} /* end of png_read_filter_row_mmx_up() */
-
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ R E A D _ F I L T E R _ R O W */
-/* */
-/*===========================================================================*/
-
-
-/* Optimized png_read_filter_row routines */
-
-void /* PRIVATE */
-png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep
- row, png_bytep prev_row, int filter)
-{
-#ifdef PNG_DEBUG
- char filnm[10];
-#endif
-
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-/* GRR: these are superseded by png_ptr->asm_flags: */
-#define UseMMX_sub 1 /* GRR: converted 20000730 */
-#define UseMMX_up 1 /* GRR: converted 20000729 */
-#define UseMMX_avg 1 /* GRR: converted 20000828 (+ 16-bit bugfix 20000916) */
-#define UseMMX_paeth 1 /* GRR: converted 20000828 */
-
- if (_mmx_supported == 2) {
- /* this should have happened in png_init_mmx_flags() already */
-#if !defined(PNG_1_0_X)
- png_warning(png_ptr, "asm_flags may not have been initialized");
-#endif
- png_mmx_support();
- }
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
-
-#ifdef PNG_DEBUG
- png_debug(1, "in png_read_filter_row (pnggccrd.c)\n");
- switch (filter)
- {
- case 0: sprintf(filnm, "none");
- break;
- case 1: sprintf(filnm, "sub-%s",
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" :
-#endif
-#endif
-"x86");
- break;
- case 2: sprintf(filnm, "up-%s",
-#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
-#if !defined(PNG_1_0_X)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" :
-#endif
-#endif
- "x86");
- break;
- case 3: sprintf(filnm, "avg-%s",
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" :
-#endif
-#endif
- "x86");
- break;
- case 4: sprintf(filnm, "Paeth-%s",
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":
-#endif
-#endif
-"x86");
- break;
- default: sprintf(filnm, "unknw");
- break;
- }
- png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm);
- png_debug1(0, "row=0x%08lx, ", (unsigned long)row);
- png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth,
- (int)((row_info->pixel_depth + 7) >> 3));
- png_debug1(0,"rowbytes=%8ld\n", row_info->rowbytes);
-#endif /* PNG_DEBUG */
-
- switch (filter)
- {
- case PNG_FILTER_VALUE_NONE:
- break;
-
- case PNG_FILTER_VALUE_SUB:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
-#else
- if (_mmx_supported)
-#endif
- {
- png_read_filter_row_mmx_sub(row_info, row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_bytep rp = row + bpp;
- png_bytep lp = row;
-
- for (i = bpp; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff);
- rp++;
- }
- } /* end !UseMMX_sub */
- break;
-
- case PNG_FILTER_VALUE_UP:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
-#else
- if (_mmx_supported)
-#endif
- {
- png_read_filter_row_mmx_up(row_info, row, prev_row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_uint_32 istop = row_info->rowbytes;
- png_bytep rp = row;
- png_bytep pp = prev_row;
-
- for (i = 0; i < istop; ++i)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
- } /* end !UseMMX_up */
- break;
-
- case PNG_FILTER_VALUE_AVG:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
-#else
- if (_mmx_supported)
-#endif
- {
- png_read_filter_row_mmx_avg(row_info, row, prev_row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_bytep rp = row;
- png_bytep pp = prev_row;
- png_bytep lp = row;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_uint_32 istop = row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++) >> 1)) & 0xff);
- rp++;
- }
-
- for (i = 0; i < istop; i++)
- {
- *rp = (png_byte)(((int)(*rp) +
- ((int)(*pp++ + *lp++) >> 1)) & 0xff);
- rp++;
- }
- } /* end !UseMMX_avg */
- break;
-
- case PNG_FILTER_VALUE_PAETH:
-#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK)
-#if !defined(PNG_1_0_X)
- if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) &&
- (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) &&
- (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold))
-#else
- if (_mmx_supported)
-#endif
- {
- png_read_filter_row_mmx_paeth(row_info, row, prev_row);
- }
- else
-#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */
- {
- png_uint_32 i;
- png_bytep rp = row;
- png_bytep pp = prev_row;
- png_bytep lp = row;
- png_bytep cp = prev_row;
- png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3;
- png_uint_32 istop = row_info->rowbytes - bpp;
-
- for (i = 0; i < bpp; i++)
- {
- *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff);
- rp++;
- }
-
- for (i = 0; i < istop; i++) /* use leftover rp,pp */
- {
- int a, b, c, pa, pb, pc, p;
-
- a = *lp++;
- b = *pp++;
- c = *cp++;
-
- p = b - c;
- pc = a - c;
-
-#ifdef PNG_USE_ABS
- pa = abs(p);
- pb = abs(pc);
- pc = abs(p + pc);
-#else
- pa = p < 0 ? -p : p;
- pb = pc < 0 ? -pc : pc;
- pc = (p + pc) < 0 ? -(p + pc) : p + pc;
-#endif
-
- /*
- if (pa <= pb && pa <= pc)
- p = a;
- else if (pb <= pc)
- p = b;
- else
- p = c;
- */
-
- p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c;
-
- *rp = (png_byte)(((int)(*rp) + p) & 0xff);
- rp++;
- }
- } /* end !UseMMX_paeth */
- break;
-
- default:
- png_warning(png_ptr, "Ignoring bad row-filter type");
- *row=0;
- break;
- }
-}
-
-#endif /* PNG_HAVE_ASSEMBLER_READ_FILTER_ROW */
-
-
-/*===========================================================================*/
-/* */
-/* P N G _ M M X _ S U P P O R T */
-/* */
-/*===========================================================================*/
-
-/* GRR NOTES: (1) the following code assumes 386 or better (pushfl/popfl)
- * (2) all instructions compile with gcc 2.7.2.3 and later
- * (3) the function is moved down here to prevent gcc from
- * inlining it in multiple places and then barfing be-
- * cause the ".NOT_SUPPORTED" label is multiply defined
- * [is there a way to signal that a *single* function should
- * not be inlined? is there a way to modify the label for
- * each inlined instance, e.g., by appending _1, _2, etc.?
- * maybe if don't use leading "." in label name? (nope...sigh)]
- */
projects / wxWidgets.git / blobdiff