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#include <cmath>
#include "utest_helper.hpp"
#include <string.h>
void builtin_tgamma(void)
{
const int n = 1024;
float src[n];
float ULPSIZE_NO_FAST_MATH = 16.0;
// Setup kernel and buffers
OCL_CREATE_KERNEL("builtin_tgamma");
OCL_CREATE_BUFFER(buf[0], 0, n * sizeof(float), NULL);
OCL_CREATE_BUFFER(buf[1], 0, n * sizeof(float), NULL);
OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
OCL_SET_ARG(1, sizeof(cl_mem), &buf[1]);
globals[0] = n;
locals[0] = 16;
float ULPSIZE_FACTOR = select_ulpsize(ULPSIZE_FAST_MATH,ULPSIZE_NO_FAST_MATH);
cl_device_fp_config fp_config;
clGetDeviceInfo(device, CL_DEVICE_SINGLE_FP_CONFIG, sizeof(cl_device_fp_config), &fp_config, 0);
bool denormals_supported = fp_config & CL_FP_DENORM;
float max_ulp = 0, max_ulp_at = 0;
for (int j = 0; j < 128; j ++) {
OCL_MAP_BUFFER(0);
for (int i = 0; i < n; ++i) {
src[i] = ((float*)buf_data[0])[i] = j - 64 + i*0.001f;
}
OCL_UNMAP_BUFFER(0);
OCL_NDRANGE(1);
OCL_MAP_BUFFER(1);
float *dst = (float*)buf_data[1];
for (int i = 0; i < n; ++i) {
float cpu = tgamma(src[i]);
if (!denormals_supported && std::fpclassify(cpu)==FP_SUBNORMAL && dst[i]==0) {
cpu = 0;
}
if (fabsf(cpu - dst[i]) > cl_FLT_ULP(cpu) * max_ulp) {
max_ulp = fabsf(cpu - dst[i]) / cl_FLT_ULP(cpu);
max_ulp_at = src[i];
}
if (std::isinf(cpu)) {
OCL_ASSERT(std::isinf(dst[i]));
} else if (fabsf(cpu - dst[i]) >= cl_FLT_ULP(cpu) * ULPSIZE_FACTOR) {
printf("%f %f %f", src[i], cpu, dst[i]);
OCL_ASSERT(0);
}
}
OCL_UNMAP_BUFFER(1);
}
printf("max error=%f ulp at x=%f ", max_ulp, max_ulp_at);
}
MAKE_UTEST_FROM_FUNCTION(builtin_tgamma);
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