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optimize zuc

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This commit is contained in:
Zhi Guan
2018-07-07 00:23:44 +08:00
parent 83c62961db
commit a0e5d103ba
1 changed files with 15 additions and 9 deletions
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24
crypto/zuc/zuc_core.c
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@@ -124,15 +124,21 @@ static const uint8_t S1[256] = {
{int j; for (j=0; j<15;j++) LFSR[j]=LFSR[j+1];} \
LFSR[15] = V
#define LFSRWithWorkMode() \
V = LFSR[0]; \
ADD31(V, ROT31(LFSR[0], 8)); \
ADD31(V, ROT31(LFSR[4], 20)); \
ADD31(V, ROT31(LFSR[10], 21)); \
ADD31(V, ROT31(LFSR[13], 17)); \
ADD31(V, ROT31(LFSR[15], 15)); \
{int j; for (j=0; j<15;j++) LFSR[j]=LFSR[j+1];} \
LFSR[15] = V
#define LFSRWithWorkMode() \
{ \
int j; \
uint64_t a = LFSR[0]; \
a += ((uint64_t)LFSR[0]) << 8; \
a += ((uint64_t)LFSR[4]) << 20; \
a += ((uint64_t)LFSR[10]) << 21; \
a += ((uint64_t)LFSR[13]) << 17; \
a += ((uint64_t)LFSR[15]) << 15; \
a = (a & 0x7fffffff) + (a >> 31); \
V = (a & 0x7fffffff) + (a >> 31); \
for (j = 0; j < 15; j++) \
LFSR[j] = LFSR[j+1]; \
LFSR[15] = V; \
}
#define BitReconstruction2(X1,X2) \
X1 = ((LFSR[11] & 0xFFFF) << 16) | (LFSR[9] >> 15); \