1// REQUIRES-ANY: arm-target-arch,armv6m-target-arch
2// RUN: %clang_builtins %s %librt -o %t && %run %t
3//===-- aeabi_frsub.c - Test __aeabi_frsub --------------------------------===//
4//
5// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
6// See https://llvm.org/LICENSE.txt for license information.
7// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8//
9//===----------------------------------------------------------------------===//
10//
11// This file tests __aeabi_frsub for the compiler_rt library.
12//
13//===----------------------------------------------------------------------===//
14
15#include <stdio.h>
16#include <stdlib.h>
17#include <math.h>
18
19
20#if __arm__
21extern __attribute__((pcs("aapcs"))) float __aeabi_frsub(float a, float b);
22
23int test__aeabi_frsub(float a, float b, float expected)
24{
25    float actual = __aeabi_frsub(a, b);
26    if (actual != expected)
27        printf("error in __aeabi_frsub(%f, %f) = %f, expected %f\n",
28               a, b, actual, expected);
29    return actual != expected;
30}
31#endif
32
33int main()
34{
35#if __arm__
36    if (test__aeabi_frsub(1.0, 1.0, 0.0))
37        return 1;
38    if (test__aeabi_frsub(1234.567, 765.4321, -469.134900))
39        return 1;
40    if (test__aeabi_frsub(-123.0, -678.0, -555.0))
41        return 1;
42    if (test__aeabi_frsub(0.0, -0.0, 0.0))
43        return 1;
44#else
45    printf("skipped\n");
46#endif
47    return 0;
48}
49