OSX/libsecurity_cryptkit/lib/giantPort_PPC.h

   1 /* Copyright (c) 1998,2011,2014 Apple Inc.  All Rights Reserved.
   2  *
   3  * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
   4  * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
   5  * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE, INC. AND THE
   6  * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE,
   7  * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
   8  * EXPOSE YOU TO LIABILITY.
   9  ***************************************************************************
  10  *
  11  * giantPort_PPC.h - PPC-dependent giant definitions.
  12  *
  13  * Revision History
  14  * ----------------
  15  * 10/06/98             ap
  16  *      Changed to compile with C++.
  17  * 06 Apr 1998 at Apple
  18  *      Created.
  19  */
  20
  21 #ifndef _CK_NSGIANT_PORT_PPC_H_
  22 #define _CK_NSGIANT_PORT_PPC_H_
  23
  24 #include "feeDebug.h"
  25 #include "platform.h"
  26 #include "giantIntegers.h"
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif
  31
  32 /**** FIXME - implement asm giant digits! ****/
  33 /*
  34  * 0 ==> use function declarations from this file and implementation
  35  *       in giantPort_PPC.c
  36  * 1 ==> use static inline C function in giantPort_Generic.h
  37  */
  38 /*@@@ HACK @@@
  39 #if defined NeXT
  40 #define PPC_GIANT_PORT_INLINE   1
  41 #else
  42 #define PPC_GIANT_PORT_INLINE   0
  43 #endif
  44 */
  45 #define PPC_GIANT_PORT_INLINE   1
  46
  47 #if     PPC_GIANT_PORT_INLINE
  48
  49 #include "giantPort_Generic.h"
  50
  51 #else   // PPC_GIANT_PORT_INLINE
  52
  53 /*
  54  * We'll be using the compiler's 64-bit long long for these routines.
  55  *
  56  * Mask for upper word.
  57  */
  58 #define GIANT_UPPER_DIGIT_MASK  (~(unsigned long long(GIANT_DIGIT_MASK)))
  59
  60 /*
  61  * Multiple-precision arithmetic routines/macros. C for now, eventually
  62  * they'll be in assembly.
  63  */
  64
  65 /*
  66  * Add two digits, return sum. Carry bit returned as an out parameter.
  67  * This should work any size giantDigits up to unsigned int.
  68  */
  69 extern giantDigit giantAddDigits(
  70         giantDigit dig1,
  71         giantDigit dig2,
  72         giantDigit *carry);                     /* RETURNED, 0 or 1 */
  73
  74 /*
  75  * Add a single digit value to a double digit accumulator in place.
  76  * Carry out of the MSD of the accumulator is not handled.
  77  */
  78 void giantAddDouble(
  79         giantDigit *accLow,                     /* IN/OUT */
  80         giantDigit *accHigh,                    /* IN/OUT */
  81         giantDigit val);
  82
  83
  84 /*
  85  * Subtract a - b, return difference. Borrow bit returned as an out parameter.
  86  */
  87 giantDigit giantSubDigits(
  88         giantDigit a,
  89         giantDigit b,
  90         giantDigit *borrow);                    /* RETURNED, 0 or 1 */
  91
  92
  93 /*
  94  * Multiply two digits, return two digits.
  95  */
  96 void giantMulDigits(
  97         giantDigit      dig1,
  98         giantDigit      dig2,
  99         giantDigit      *lowProduct,            /* RETURNED, low digit */
 100         giantDigit      *hiProduct);            /* RETURNED, high digit */
 101
 102 /*
 103  * Multiply a vector of giantDigits, candVector, by a single giantDigit,
 104  * plierDigit, adding results into prodVector. Returns m.s. digit from
 105  * final multiply; only candLength digits of *prodVector will be written.
 106  */
 107 giantDigit VectorMultiply(
 108         giantDigit plierDigit,
 109         giantDigit *candVector,
 110         unsigned candLength,
 111         giantDigit *prodVector);
 112
 113 #ifdef __cplusplus
 114 }
 115 #endif
 116
 117 #endif  /* !PPC_GIANT_PORT_INLINE */
 118
 119 #endif  /*_CK_NSGIANT_PORT_PPC_H_*/