1// RUN: %clang_builtins %s %librt -o %t && %run %t
2
3#define DOUBLE_PRECISION
4#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, // subnormals
29 -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