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lbry: small sha512 improvement

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This commit is contained in:
Tanguy Pruvot 2016-09-04 18:06:10 +02:00
parent f8aa16f8d2
commit f982fd70d5
1 changed files with 20 additions and 10 deletions
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30
lbry/cuda_sha512_lbry.cu
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@ -40,21 +40,30 @@ uint64_t K_512[80] = {
#undef xor3
#define xor3(a,b,c) (a^b^c)
//#define ROR64_8(x) ROTR64(x,8)
__device__ __inline__
uint64_t ROR64_8(const uint64_t u64) {
const uint2 a = vectorize(u64);
uint2 result;
result.x = __byte_perm(a.y, a.x, 0x0765);
result.y = __byte_perm(a.y, a.x, 0x4321);
return devectorize(result);
}
#define bsg5_0(x) xor3(ROTR64(x,28),ROTR64(x,34),ROTR64(x,39))
#define bsg5_1(x) xor3(ROTR64(x,14),ROTR64(x,18),ROTR64(x,41))
#define ssg5_0(x) xor3(ROTR64(x,1),ROTR64(x,8),x>>7)
#define ssg5_1(x) xor3(ROTR64(x,19),ROTR64(x,61),x>>6)
#define ssg5_0(x) xor3(ROTR64(x,1), ROR64_8(x), x>>7)
#define ssg5_1(x) xor3(ROTR64(x,19),ROTR64(x,61), x>>6)
#define andor64(a,b,c) ((a & (b | c)) | (b & c))
#define xandx64(e,f,g) (g ^ (e & (g ^ f)))
static __device__ __forceinline__
void sha512_step2(uint64_t* r,const uint64_t W,const uint64_t K, const int ord)
void sha512_step2(uint64_t* r, const uint64_t W, const uint64_t K, const int ord)
{
const uint64_t T1 = r[(15-ord) & 7] + K + W + bsg5_1(r[(12-ord) & 7]) + xandx64(r[(12-ord) & 7],r[(13-ord) & 7],r[(14-ord) & 7]);
r[(15-ord)& 7] = andor64(r[( 8-ord) & 7],r[( 9-ord) & 7],r[(10-ord) & 7]) + bsg5_0(r[( 8-ord) & 7]) + T1;
r[(11-ord)& 7]+= T1;
r[(15-ord) & 7] = andor64(r[(8-ord) & 7],r[(9-ord) & 7],r[(10-ord) & 7]) + bsg5_0(r[(8-ord) & 7]) + T1;
r[(11-ord) & 7] += T1;
}
/**************************************************************************************************/
@ -67,16 +76,17 @@ void lbry_sha512_gpu_hash_32(const uint32_t threads, uint64_t *g_hash)
0x6A09E667F3BCC908, 0xBB67AE8584CAA73B, 0x3C6EF372FE94F82B, 0xA54FF53A5F1D36F1,
0x510E527FADE682D1, 0x9B05688C2B3E6C1F, 0x1F83D9ABFB41BD6B, 0x5BE0CD19137E2179
};
uint64_t r[8];
uint64_t W[16];
if (thread < threads)
{
uint64_t *pHash = &g_hash[thread<<3];
*(uint2x4*)&r[ 0] = *(uint2x4*)&IV512[ 0];
*(uint2x4*)&r[ 4] = *(uint2x4*)&IV512[ 4];
*(uint2x4*)&r[0] = *(uint2x4*)&IV512[0];
*(uint2x4*)&r[4] = *(uint2x4*)&IV512[4];
*(uint2x4*)&W[ 0] = __ldg4((uint2x4*)&pHash[ 0]);
*(uint2x4*)&W[0] = __ldg4((uint2x4*)pHash);
W[4] = 0x8000000000000000; // end tag
@ -91,7 +101,7 @@ void lbry_sha512_gpu_hash_32(const uint32_t threads, uint64_t *g_hash)
}
#pragma unroll
for (int i = 16; i < 80; i+=16){
for (int i = 16; i < 80; i+=16) {
#pragma unroll
for (int j = 0; j<16; j++) {
W[(i + j) & 15] += W[((i + j) - 7) & 15] + ssg5_0(W[((i + j) - 15) & 15]) + ssg5_1(W[((i + j) - 2) & 15]);