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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2
   3 #define QUAD_PRECISION
   4 #include <fenv.h>
   5 #include <math.h>
   6 #include <stdio.h>
   7 #include "fp_lib.h"
   8
   9 // Since we are comparing the compiler-rt IEEE implementation against libc's
  10 // long double implementation, this test can only succeed if long double
  11 // is an IEEE 128-bit floating point number.
  12 #if defined(CRT_HAS_TF_MODE) && defined(CRT_LDBL_IEEE_F128)
  13
  14 int test__compiler_rt_fmaxl(fp_t x, fp_t y) {
  15   fp_t crt_value = __compiler_rt_fmaxl(x, y);
  16   fp_t libm_value = fmaxl(x, y);
  17   // Consider +0 and -0 equal, and also disregard the sign/payload of two NaNs.
  18   if (crt_value != libm_value &&
  19       !(crt_isnan(crt_value) && crt_isnan(libm_value))) {
  20     // Split expected values into two for printf
  21     twords x_t, y_t, crt_value_t, libm_value_t;
  22     x_t.all = toRep(x);
  23     y_t.all = toRep(y);
  24     crt_value_t.all = toRep(crt_value);
  25     libm_value_t.all = toRep(libm_value);
  26     printf(
  27         "error: in __compiler_rt_fmaxl([%llX %llX], [%llX %llX]) = "
  28         "[%llX %llX] != [%llX %llX]\n",
  29         (unsigned long long)x_t.s.high, (unsigned long long)x_t.s.low,
  30         (unsigned long long)y_t.s.high, (unsigned long long)y_t.s.low,
  31         (unsigned long long)crt_value_t.s.high,
  32         (unsigned long long)crt_value_t.s.low,
  33         (unsigned long long)libm_value_t.s.high,
  34         (unsigned long long)libm_value_t.s.low);
  35     return 1;
  36   }
  37   return 0;
  38 }
  39
  40 fp_t cases[] = {
  41   -NAN, NAN, -INFINITY, INFINITY, -0.0, 0.0, -1, 1, -2, 2,
  42   -0x1.0p-16383L, 0x1.0p-16383L, -0x1.0p-16384L, 0x1.0p-16384L, // subnormals
  43   -1.001, 1.001, -1.002, 1.002,
  44 };
  45
  46 int main() {
  47   const unsigned N = sizeof(cases) / sizeof(cases[0]);
  48   unsigned i, j;
  49   for (i = 0; i < N; ++i) {
  50     for (j = 0; j < N; ++j) {
  51       if (test__compiler_rt_fmaxl(cases[i], cases[j])) return 1;
  52     }
  53   }
  54   return 0;
  55 }
  56 #else
  57 int main() {
  58   printf("skipped\n");
  59   return 0;
  60 }
  61 #endif