compiler-rt/test/builtins/Unit/divdf3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_divdf3
   3 //===--------------- divdf3_test.c - Test __divdf3 ------------------------===//
   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 __divdf3 for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18 #include "fp_test.h"
  19
  20 // Returns: a / b
  21 COMPILER_RT_ABI double __divdf3(double a, double b);
  22
  23 int test__divdf3(double a, double b, uint64_t expected)
  24 {
  25     double x = __divdf3(a, b);
  26     int ret = compareResultD(x, expected);
  27
  28     if (ret){
  29         printf("error in test__divdf3(%.20e, %.20e) = %.20e, "
  30                "expected %.20e\n", a, b, x,
  31                fromRep64(expected));
  32     }
  33     return ret;
  34 }
  35
  36 int main()
  37 {
  38     // 1/3
  39     if (test__divdf3(1., 3., 0x3fd5555555555555ULL))
  40       return 1;
  41     // smallest normal result
  42     if (test__divdf3(4.450147717014403e-308, 2., 0x10000000000000ULL))
  43       return 1;
  44
  45     return 0;
  46 }