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eliminate extra copy

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This commit is contained in:
orignal 2017-05-03 14:54:14 -04:00
parent d1bf7951c1
commit 63726e43f5
1 changed files with 11 additions and 9 deletions
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20
gost/cuda_gosthash.cu
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@ -6,7 +6,7 @@
*
* ==========================(LICENSE BEGIN)============================
*
* @author Tanguy Pruvot <tpruvot@github> 2015
* @author Tanguy Pruvot <tpruvot@github> 2015, orignal <orignal@github> 2017
*/
#include <stdio.h>
@ -15,9 +15,14 @@
typedef unsigned char uchar;
static uint32_t* d_resNonces[MAX_GPUS] = { 0 };
__constant__ static uint64_t __align__(8) c_header1[10], c_header2[8]; // two blocks
// c_header1 +2 is leading zero,1 and first 16 bytes of header for first hash
// c_headse1 is leading zero and 1 for second hash
__constant__ static uint64_t __align__(8) c_header1[10] =
{
0, 0, 0, 0, 0, 0, 0, 0x0100000000000000, 0, 0
},
// c_header1 +2 is leading zero,1 and first 16 bytes of header for first hash
// c_header1 is leading zero and 1 for second hash
c_header2[8]; // second block of 64 bytes
__device__ uint64_t d_target[1];
//#define FULL_UNROLL
@ -911,11 +916,8 @@ void gostd_free(int thr_id)
__host__
void gostd_setBlock_80(uint32_t *pdata, uint32_t *ptarget)
{
// fill first 48 bytes, leading 1 and first 16 bytes for header
uint8_t dat1[80] = {0};
dat1[63] = 1;
memcpy (dat1 + 64, pdata, 16);
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_header1, dat1, 80, 0, cudaMemcpyHostToDevice));
// copy first 16 bytes to the end of c_header1
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_header1, pdata, 16, 64, cudaMemcpyHostToDevice));
// other 64 bytes, but since we set nonce later on we don't copy it
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_header2, pdata + 4, 60, 0, cudaMemcpyHostToDevice));
CUDA_SAFE_CALL(cudaMemcpyToSymbol(d_target, &ptarget[6], 8, 0, cudaMemcpyHostToDevice));