38 lines · c
1// REQUIRES: arm-target-arch || armv6m-target-arch2// RUN: %clang_builtins %s %librt -o %t && %run %t3 4#include <stdio.h>5#include <stdlib.h>6#include <math.h>7 8 9#if __arm__10extern __attribute__((pcs("aapcs"))) float __aeabi_frsub(float a, float b);11 12int 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#endif21 22int 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#else34 printf("skipped\n");35#endif36 return 0;37}38