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minor performance improvement

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orignal 2017-05-01 13:54:19 -04:00
parent bc4d9b7496
commit 8e9f64b162
1 changed files with 26 additions and 17 deletions
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43
gost/cuda_gosthash.cu
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@ -557,7 +557,7 @@ __device__ static uint64_t T7[256] = {
};
// KeySchedule
__constant__ uint64_t const CC[12][8] = {{
__constant__ static uint64_t CC[12][8] = {{
0xe9daca1eda5b08b1, 0x1f7c65c0812fcbeb, 0x16d0452e43766a2f, 0xfcc485758db84e71,
0x0169679291e07c4b, 0x15d360a4082a42a2, 0x234d74cc36747605, 0x0745a6f2596580dd
}, {
@ -619,6 +619,19 @@ void GOST_Add512(void *x, void * const a, void * const b)
}
}
__device__ __forceinline__
void GOST_Add32 (void * buf, uint32_t c)
{
#pragma unroll
for(int i = 63; i >= 59; i--)
{
if (!c) return;
c += ((uint8_t *)buf)[i];
((uint8_t *)buf)[i] = c;
c >>= 8;
}
}
__device__ __forceinline__
void GOST_Copy512(uint64_t* dst, uint64_t* const __restrict__ src)
{
@ -827,37 +840,33 @@ void GOST_g_N(uint64_t* h, uint64_t* const M, uint64_t* const N)
__device__ __forceinline__
void GOST_hash_X(uint64_t *hash, uchar * const message, uint64_t len)
void GOST_hash_X(uint64_t *hash, uchar * const message, uint32_t len)
{
uint64_t Sigma[8] = { 0 };
uint64_t N[8] = { 0 };
uchar v512[64] = { 0 };
v512[62] = 0x02;
// Stage 2
while (len >= 512)
while (len >= 64)
{
uint64_t X[8];
memcpy(X, message + len/8 - 63 - ( (len & 0x7) == 0 ), 64);
memcpy(X, message + len - 64, 64);
GOST_g_N(hash, X, N);
GOST_Add512(N, N, v512);
GOST_Add32 (N, 512);
GOST_Add512(Sigma, Sigma, X);
len -= 512;
len -= 64;
}
uint64_t M[8];
uchar* m = (uchar*) M;
memset(m, 0, 64);
memcpy(m + 63 - len/8 + ( (len & 0x7) == 0 ), message, len/8 + 1 - ( (len & 0x7) == 0 ));
uint32_t padding = 64 - len;
memset(m, 0, padding - 1);
m[padding - 1] = 1;
memcpy (m + padding, message, len);
// Stage 3 (Close)
m[ 63 - len/8 ] |= (1 << (len & 0x7));
GOST_g_N(hash, M, N);
v512[63] = len & 0xFF;
v512[62] = len >> 8;
GOST_Add512(N, N, v512);
GOST_Add32 (N, len << 3); // len*8
GOST_Add512(Sigma, Sigma, M);
memset(M, 0, 64);
@ -878,11 +887,11 @@ void gostd_gpu_hash_80(const uint32_t threads, const uint32_t startNonce, uint32
for (int i = 0; i < 19; i++) dat[i] = c_header[i];
dat[19] = cuda_swab32 (nonce);
uint64_t hash1[8] = { 0 }; //iv for 512
GOST_hash_X(hash1, (uchar*)dat, 640); // 80 bytes
GOST_hash_X(hash1, (uchar*)dat, 80); // 80 bytes
uint64_t hash[8];
#pragma unroll
for (int i=0; i< 8; i++) hash[i] = 0x0101010101010101; // iv for 256
GOST_hash_X(hash, (uchar *)hash1, 512); // 64 bytes
GOST_hash_X(hash, (uchar *)hash1, 64); // 64 bytes
// result is first 32 bytes of hash
uint64_t high = MAKE_ULONGLONG(cuda_swab32(_HIDWORD(hash[0])), cuda_swab32(_LODWORD(hash[0]))); // swab uint64_t and invert