libc/test/src/math/fmul_test.cpp


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//===-- Unittests for fmul ------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "MulTest.h"

#include "src/math/fmul.h"

#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"

LIST_MUL_TESTS(float, double, LIBC_NAMESPACE::fmul)

TEST_F(LlvmLibcMulTest, SpecialInputs) {
  namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
  double INPUTS[][2] = {
      {0x1.0100010002p8, 0x1.fffcp14},
      {0x1.000000b92144p-7, 0x1.62p7},
  };

  for (size_t i = 0; i < 2; ++i) {
    double a = INPUTS[i][0];

    for (int j = 0; j < 180; ++j) {
      a *= 0.5;
      mpfr::BinaryInput<double> input{a, INPUTS[i][1]};
      ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Mul, input,
                                     LIBC_NAMESPACE::fmul(a, INPUTS[i][1]),
                                     0.5);
    }
  }
}