compiler-rt/test/builtins/Unit/arm/aeabi_frsub_test.c

   1 // REQUIRES: arm-target-arch || armv6m-target-arch
   2 // RUN: %clang_builtins %s %librt -o %t && %run %t
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <math.h>
   7
   8
   9 #if __arm__
  10 extern __attribute__((pcs("aapcs"))) float __aeabi_frsub(float a, float b);
  11
  12 int test__aeabi_frsub(float a, float b, float expected)
  13 {
  14     float actual = __aeabi_frsub(a, b);
  15     if (actual != expected)
  16         printf("error in __aeabi_frsub(%f, %f) = %f, expected %f\n",
  17                a, b, actual, expected);
  18     return actual != expected;
  19 }
  20 #endif
  21
  22 int main()
  23 {
  24 #if __arm__
  25     if (test__aeabi_frsub(1.0, 1.0, 0.0))
  26         return 1;
  27     if (test__aeabi_frsub(1234.567, 765.4321, -469.134900))
  28         return 1;
  29     if (test__aeabi_frsub(-123.0, -678.0, -555.0))
  30         return 1;
  31     if (test__aeabi_frsub(0.0, -0.0, 0.0))
  32         return 1;
  33 #else
  34     printf("skipped\n");
  35 #endif
  36     return 0;
  37 }