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speed up GCM key setup

pull/2/head
weidai 2009-03-13 11:33:45 +00:00
parent f8f2e7fee1
commit 35820c22c2
1 changed files with 7 additions and 3 deletions
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10
gcm.cpp
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@ -49,10 +49,14 @@ void gcm_gf_mult(const unsigned char *a, const unsigned char *b, unsigned char *
}
#endif
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE || CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
inline static void SSE2_Xor16(byte *a, const byte *b, const byte *c)
{
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
*(__m128i *)a = _mm_xor_si128(*(__m128i *)b, *(__m128i *)c);
#else
asm ("movdqa %1, %%xmm0; pxor %2, %%xmm0; movdqa %%xmm0, %0;" : "=m" (a[0]) : "m"(b[0]), "m"(c[0]));
#endif
}
#endif
@ -103,7 +107,7 @@ void GCM_Base::SetKeyWithoutResync(const byte *userKey, size_t keylength, const
for (i=0; i<16; i++)
{
memset(table+i*256*16, 0, 16);
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE || CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
if (HasSSE2())
for (j=2; j<=0x80; j*=2)
for (k=1; k<j; k++)
@ -149,7 +153,7 @@ void GCM_Base::SetKeyWithoutResync(const byte *userKey, size_t keylength, const
{
memset(table+i*256, 0, 16);
memset(table+1024+i*256, 0, 16);
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
#if CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE || CRYPTOPP_BOOL_SSE2_ASM_AVAILABLE
if (HasSSE2())
for (j=2; j<=8; j*=2)
for (k=1; k<j; k++)