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Commit	Line	Data
	1	; crc_lcc.asm, optimized CRC calculation function for Zip and UnZip, not
	2	; copyrighted by Paul Kienitz and Christian Spieler. Last revised 25 Mar 98.
	3	;
	4	; The code in this file has been copied verbatim from crc_i386.{asm\|S};
	5	; only the assembler syntax and metacommands have been adapted to
	6	; the habits of the free LCC-Win32 C compiler package.
	7	; This version of the code uses the "optimized for i686" variant of
	8	; crc_i386.{asm\|S}.
	9	;
	10	; For more information (and a revision log), look into the original
	11	; source files.
	12	;
	13	.text
	14	.file "crc32.c"
	15	.text
	16	.type _crc32,function
	17	_crc32:
	18	pushl %ebp
	19	movl %esp,%ebp
	20	pushl %ecx
	21	pushl %ebx
	22	pushl %esi
	23	pushl %edi
	24	.line 34
	25	.line 37
	26	movl 12(%ebp),%esi
	27	subl %eax,%eax
	28	testl %esi,%esi
	29	jz _$3
	30	.line 39
	31	call _get_crc_table
	32	movl %eax,%edi
	33	.line 41
	34	movl 8(%ebp),%eax
	35	movl 16(%ebp),%ecx
	36	notl %eax
	37	testl %ecx,%ecx
	38	jz _$4
	39	_$5:
	40	testl $3,%esi
	41	jz _$6
	42	xorb (%esi),%al
	43	incl %esi
	44	movzbl %al,%ebx
	45	shrl $8,%eax
	46	xorl (%edi,%ebx,4),%eax
	47	decl %ecx
	48	jnz _$5
	49	_$6:
	50	movl %ecx,%edx
	51	andl $7,%edx
	52	shrl $3,%ecx
	53	jz _$8
	54	_$7:
	55	xorl (%esi),%eax
	56	addl $4,%esi
	57	movzbl %al,%ebx
	58	shrl $8,%eax
	59	xorl (%edi,%ebx,4),%eax
	60	movzbl %al,%ebx
	61	shrl $8,%eax
	62	xorl (%edi,%ebx,4),%eax
	63	movzbl %al,%ebx
	64	shrl $8,%eax
	65	xorl (%edi,%ebx,4),%eax
	66	movzbl %al,%ebx
	67	shrl $8,%eax
	68	xorl (%edi,%ebx,4),%eax
	69	xorl (%esi),%eax
	70	addl $4,%esi
	71	movzbl %al,%ebx
	72	shrl $8,%eax
	73	xorl (%edi,%ebx,4),%eax
	74	movzbl %al,%ebx
	75	shrl $8,%eax
	76	xorl (%edi,%ebx,4),%eax
	77	movzbl %al,%ebx
	78	shrl $8,%eax
	79	xorl (%edi,%ebx,4),%eax
	80	movzbl %al,%ebx
	81	shrl $8,%eax
	82	xorl (%edi,%ebx,4),%eax
	83	decl %ecx
	84	jnz _$7
	85	_$8:
	86	movl %edx,%ecx
	87	jecxz _$4
	88	_$9:
	89	xorb (%esi),%al
	90	incl %esi
	91	movzbl %al,%ebx
	92	shrl $8,%eax
	93	xorl (%edi,%ebx,4),%eax
	94	decl %ecx
	95	jnz _$9
	96	_$4:
	97	xorl $0xffffffff,%eax
	98	_$3:
	99	.line 52
	100	popl %edi
	101	popl %esi
	102	popl %ebx
	103	leave
	104	ret
	105	_$34:
	106	.size _crc32,_$34-_crc32
	107	.globl _crc32
	108	.extern _get_crc_table