libc/test/src/fenv/feclearexcept_test.cpp

   1 //===-- Unittests for feclearexcept with exceptions enabled ---------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "src/fenv/feclearexcept.h"
  10
  11 #include "src/__support/FPUtil/FEnvImpl.h"
  12 #include "test/UnitTest/Test.h"
  13
  14 #include <fenv.h>
  15 #include <stdint.h>
  16
  17 TEST(LlvmLibcFEnvTest, ClearTest) {
  18   uint16_t excepts[] = {FE_DIVBYZERO, FE_INVALID, FE_INEXACT, FE_OVERFLOW,
  19                         FE_UNDERFLOW};
  20   LIBC_NAMESPACE::fputil::disable_except(FE_ALL_EXCEPT);
  21   LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
  22
  23   for (uint16_t e : excepts)
  24     ASSERT_EQ(LIBC_NAMESPACE::fputil::test_except(e), 0);
  25
  26   LIBC_NAMESPACE::fputil::raise_except(FE_ALL_EXCEPT);
  27
  28   for (uint16_t e1 : excepts) {
  29     for (uint16_t e2 : excepts) {
  30       for (uint16_t e3 : excepts) {
  31         for (uint16_t e4 : excepts) {
  32           for (uint16_t e5 : excepts) {
  33             // We clear one exception and test to verify that it was cleared.
  34             LIBC_NAMESPACE::feclearexcept(e1 | e2 | e3 | e4 | e5);
  35             ASSERT_EQ(
  36                 LIBC_NAMESPACE::fputil::test_except(e1 | e2 | e3 | e4 | e5), 0);
  37             // After clearing, we raise the exception again.
  38             LIBC_NAMESPACE::fputil::raise_except(e1 | e2 | e3 | e4 | e5);
  39           }
  40         }
  41       }
  42     }
  43   }
  44 }