compiler-rt/test/builtins/Unit/compiler_rt_fmaxf_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2
   3 #define SINGLE_PRECISION
   4 #include <fenv.h>
   5 #include <math.h>
   6 #include <stdio.h>
   7 #include "fp_lib.h"
   8
   9 int test__compiler_rt_fmaxf(fp_t x, fp_t y) {
  10   fp_t crt_value = __compiler_rt_fmaxf(x, y);
  11   fp_t libm_value = fmaxf(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_fmaxf(%a [%X], %a [%X]) = %a [%X] "
  16            "!= %a [%X]\n",
  17            x, toRep(x), y, toRep(y), crt_value, toRep(crt_value), libm_value,
  18            toRep(libm_value));
  19     return 1;
  20   }
  21   return 0;
  22 }
  23
  24 fp_t cases[] = {
  25   -NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2,
  26   -0x1.0p-127, 0x1.0p-127, -0x1.0p-128, 0x1.0p-128, // subnormals
  27   -1.001, 1.001, -1.002, 1.002,
  28 };
  29
  30 int main() {
  31   const unsigned N = sizeof(cases) / sizeof(cases[0]);
  32   unsigned i, j;
  33   for (i = 0; i < N; ++i) {
  34     for (j = 0; j < N; ++j) {
  35       if (test__compiler_rt_fmaxf(cases[i], cases[j])) return 1;
  36     }
  37   }
  38   return 0;
  39 }