42 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2 3#define DOUBLE_PRECISION4#include <fenv.h>5#include <math.h>6#include <stdio.h>7#include "fp_lib.h"8 9int test__compiler_rt_fmax(fp_t x, fp_t y) {10 fp_t crt_value = __compiler_rt_fmax(x, y);11 fp_t libm_value = fmax(x, y);12 // Consider +0 and -0 equal, and also disregard the sign/payload of two NaNs.13 if (crt_value != libm_value &&14 !(crt_isnan(crt_value) && crt_isnan(libm_value))) {15 printf("error: in __compiler_rt_fmax(%a [%llX], %a [%llX]) = %a [%llX] "16 "!= %a [%llX]\n",17 x, (unsigned long long)toRep(x),18 y, (unsigned long long)toRep(y),19 crt_value, (unsigned long long)toRep(crt_value),20 libm_value, (unsigned long long)toRep(libm_value));21 return 1;22 }23 return 0;24}25 26fp_t cases[] = {27 -NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2,28 -0x1.0p-1023, 0x1.0p-1023, -0x1.0p-1024, 0x1.0p-1024, // subnormals29 -1.001, 1.001, -1.002, 1.002,30};31 32int main() {33 const unsigned N = sizeof(cases) / sizeof(cases[0]);34 unsigned i, j;35 for (i = 0; i < N; ++i) {36 for (j = 0; j < N; ++j) {37 if (test__compiler_rt_fmax(cases[i], cases[j])) return 1;38 }39 }40 return 0;41}42