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#include "utest_helper.hpp"
#include <math.h>
static void double_precision_check(void)
{
const size_t n = 16; //8192 * 4;
double d0 = 0.12345678912345678;
double d1 = 0.12355678922345678;
float cpu_result = d1 - d0;
// Setup kernel and buffers
OCL_CREATE_KERNEL("double_precision_check");
//OCL_CREATE_KERNEL("compiler_array");
buf_data[0] = (uint32_t*) malloc(sizeof(uint32_t) * n);
for (uint32_t i = 0; i < n; ++i) ((float*)buf_data[0])[i] = 0;
OCL_CREATE_BUFFER(buf[0], CL_MEM_COPY_HOST_PTR, n * sizeof(uint32_t), buf_data[0]);
OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(uint32_t), NULL);
free(buf_data[0]);
buf_data[0] = NULL;
// Run the kernel
OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
globals[0] = n;
locals[0] = 16;
OCL_NDRANGE(1);
// Check result
OCL_MAP_BUFFER(0);
OCL_MAP_BUFFER(1);
bool precisionOK = true;
for (uint32_t i = 0; i < n; ++i) {
float error = ((float*)buf_data[1])[i] - cpu_result;
if (error != 0)
precisionOK = false;
OCL_ASSERT((fabs(error) < 1e-4));
}
if (!precisionOK)
printf("\n - WARN: GPU doesn't have correct double precision. Got %.7G, expected %.7G\n", ((float*)buf_data[1])[0], cpu_result);
}
MAKE_UTEST_FROM_FUNCTION(double_precision_check);
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