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Test the target in the actual scrypt kernel itself saving further calculations.

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This commit is contained in:
Con Kolivas 2012-07-21 10:25:33 +10:00
parent 7d53fba1ad
commit a22edd2a7f
2 changed files with 7 additions and 2 deletions
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3
driver-opencl.c
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@ -998,8 +998,10 @@ static cl_int queue_scrypt_kernel(_clState *clState, dev_blk_ctx *blk, __maybe_u
char *midstate = blk->work->midstate;
cl_kernel *kernel = &clState->kernel;
unsigned int num = 0;
cl_uint le_target;
cl_int status = 0;
le_target = ~swab32((uint32_t)blk->work->target[7]);
clState->cldata = blk->work->data;
status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);
@ -1008,6 +1010,7 @@ static cl_int queue_scrypt_kernel(_clState *clState, dev_blk_ctx *blk, __maybe_u
CL_SET_ARG(clState->padbuffer8);
CL_SET_VARG(4, &midstate[0]);
CL_SET_VARG(4, &midstate[16]);
CL_SET_ARG(le_target);
return status;
}

6
scrypt120713.cl
View File

@ -689,7 +689,9 @@ void scrypt_core(uint4 X[8], __global uint4*restrict lookup)
#define NFLAG (0x7F)
__attribute__((reqd_work_group_size(WORKSIZE, 1, 1)))
__kernel void search(__global const uint4 * restrict input, __global uint*restrict output, __global uint4*restrict padcache, const uint4 midstate0, const uint4 midstate16)
__kernel void search(__global const uint4 * restrict input,
__global uint*restrict output, __global uint4*restrict padcache,
const uint4 midstate0, const uint4 midstate16, const uint target)
{
uint gid = get_global_id(0);
uint4 X[8];
@ -722,7 +724,7 @@ __kernel void search(__global const uint4 * restrict input, __global uint*restri
SHA256_fixed(&tmp0,&tmp1);
SHA256(&ostate0,&ostate1, tmp0, tmp1, (uint4)(0x80000000U, 0U, 0U, 0U), (uint4)(0U, 0U, 0U, 0x300U));
if ((ostate1.w&0xFFFF) == 0)
if (!(ostate1.w&target))
output[FOUND] = output[NFLAG & gid] = gid;
}