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

   1 // REQUIRES: arm-target-arch || armv6m-target-arch
   2 // RUN: %clang_builtins %s %librt -o %t && %run %t
   3 //===-- aeabi_drsub.c - Test __aeabi_drsub --------------------------------===//
   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_drsub 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__
  21 extern __attribute__((pcs("aapcs"))) double __aeabi_drsub(double a, double b);
  22
  23 int test__aeabi_drsub(double a, double b, double expected)
  24 {
  25     double actual = __aeabi_drsub(a, b);
  26     if (actual != expected)
  27         printf("error in __aeabi_drsub(%f, %f) = %f, expected %f\n",
  28                a, b, actual, expected);
  29     return actual != expected;
  30 }
  31 #endif
  32
  33 int main()
  34 {
  35 #if __arm__
  36     if (test__aeabi_drsub(1.0, 1.0, 0.0))
  37         return 1;
  38     if (test__aeabi_drsub(1234.567, 765.4321, -469.134900))
  39         return 1;
  40     if (test__aeabi_drsub(-123.0, -678.0, -555.0))
  41         return 1;
  42     if (test__aeabi_drsub(0.0, -0.0, 0.0))
  43         return 1;
  44 #else
  45     printf("skipped\n");
  46 #endif
  47     return 0;
  48 }