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40
41 /*
42 // Purpose:
43 // Intel(R) Integrated Performance Primitives. Cryptography Primitives.
44 // Internal Unsigned arithmetic
45 //
46 // Contents:
47 // cpSubMulDgt_BNU()
48 //
49 */
50
51 #include "owncp.h"
52 #include "pcpbnuarith.h"
53 #include "pcpbnumisc.h"
54
55
56 /*F*
57 // Name: cpSubMulDgt_BNU
58 //
59 // Purpose: multiply-and-sub BNU
60 //
61 // Returns:
62 // extension of result of multiply-and-sub BigNum.
63 //
64 // Parameters:
65 // pA source BigNum A
66 // pR resultant BigNum
67 // ns size of BigNums
68 // val value to multiply
69 *F*/
70
71 #if defined(_USE_C_cpSubMulDgt_BNU_)
72 #pragma message ("C version of cpSubMulDgt_BNU: ON")
73 #else
74 #pragma message ("C version of cpSubMulDgt_BNU: OFF")
75 #endif
76
77 #if !((_IPP==_IPP_W7) || \
78 (_IPP==_IPP_T7) || \
79 (_IPP==_IPP_V8) || \
80 (_IPP==_IPP_P8) || \
81 (_IPP>=_IPP_G9) || \
82 (_IPP==_IPP_S8) || \
83 (_IPP32E==_IPP32E_M7) || \
84 (_IPP32E==_IPP32E_U8) || \
85 (_IPP32E==_IPP32E_Y8) || \
86 (_IPP32E>=_IPP32E_E9) || \
87 (_IPP32E==_IPP32E_N8)) || \
88 defined(_USE_C_cpSubMulDgt_BNU_)
cpSubMulDgt_BNU(BNU_CHUNK_T * pR,const BNU_CHUNK_T * pA,cpSize ns,BNU_CHUNK_T val)89 BNU_CHUNK_T cpSubMulDgt_BNU(BNU_CHUNK_T* pR, const BNU_CHUNK_T* pA, cpSize ns, BNU_CHUNK_T val)
90 {
91 BNU_CHUNK_T extension = 0;
92 cpSize i;
93 for(i=0; i<ns; i++) {
94 BNU_CHUNK_T rH, rL;
95
96 MUL_AB(rH, rL, pA[i], val);
97 SUB_ABC(extension, pR[i], pR[i], rL, extension);
98 extension += rH;
99 }
100 return extension;
101 }
102 #endif
103