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
test__aeabi_frsub(float a,float b,float expected)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
main()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 }
38