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#include "utest_helper.hpp"
void compiler_sub_group_shuffle_down(void)
{
if(!cl_check_subgroups())
return;
const size_t n = 32;
const int32_t buf_size = 4 * n + 1;
// Setup kernel and buffers
OCL_CREATE_KERNEL("compiler_sub_group_shuffle_down");
OCL_CREATE_BUFFER(buf[0], 0, buf_size * sizeof(int), NULL);
OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
int c = 13;
OCL_SET_ARG(1, sizeof(int), &c);
globals[0] = n;
locals[0] = 16;
OCL_MAP_BUFFER(0);
for (int32_t i = 0; i < buf_size; ++i)
((int*)buf_data[0])[i] = -1;
OCL_UNMAP_BUFFER(0);
// Run the kernel on GPU
OCL_NDRANGE(1);
// Compare
OCL_MAP_BUFFER(0);
int* dst = (int *)buf_data[0];
int suggroupsize = dst[0];
OCL_ASSERT(suggroupsize == 8 || suggroupsize == 16);
dst++;
for (int32_t i = 0; i < (int32_t) n; ++i){
int round = i / suggroupsize;
int index = i % suggroupsize;
//printf("%d %d %d %d\n",dst[4*i], dst[4*i+1], dst[4*i+2], dst[4*i+3]);
OCL_ASSERT( (index + c >= suggroupsize ? 456 : 123) == dst[4*i]);
OCL_ASSERT( (index + c >= suggroupsize ? (round * suggroupsize + (i + c) % suggroupsize): 123) == dst[4*i+1]);
OCL_ASSERT( (index + index + 1 >= suggroupsize ? -(round * suggroupsize + (i + index + 1) % suggroupsize) : (round * suggroupsize + (i + index + 1) % suggroupsize)) == dst[4*i+2]);
OCL_ASSERT((round * suggroupsize + (suggroupsize - 1)) == dst[4*i+3]);
}
OCL_UNMAP_BUFFER(0);
}
MAKE_UTEST_FROM_FUNCTION(compiler_sub_group_shuffle_down);
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