xref: /aosp_15_r20/external/llvm-libc/test/src/math/explogxf_test.cpp (revision 71db0c75aadcf003ffe3238005f61d7618a3fead)

//===-- Unittests for supfuncf --------------------------------------------===//
//
// 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 "hdr/math_macros.h"
#include "in_float_range_test_helper.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/math/fabs.h"
#include "src/math/fabsf.h"
#include "src/math/generic/explogxf.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"

using LlvmLibcExplogfTest = LIBC_NAMESPACE::testing::FPTest<float>;
using FPBits = LIBC_NAMESPACE::fputil::FPBits<float>;

namespace mpfr = LIBC_NAMESPACE::testing::mpfr;

constexpr int def_count = 100003;
constexpr float def_prec = 0.500001f;

auto f_normal = [](float x) -> bool {
  return !(FPBits(x).is_nan() || FPBits(x).is_inf() ||
           LIBC_NAMESPACE::fabs(x) < 2E-38);
};

TEST_F(LlvmLibcExplogfTest, ExpInFloatRange) {
  auto fx = [](float x) -> float {
    auto result = LIBC_NAMESPACE::exp_b_range_reduc<LIBC_NAMESPACE::ExpBase>(x);
    double r = LIBC_NAMESPACE::ExpBase::powb_lo(result.lo);
    return static_cast<float>(result.mh * r);
  };
  auto f_check = [](float x) -> bool {
    return !((FPBits(x).is_nan() || FPBits(x).is_inf() || x < -70 || x > 70 ||
              LIBC_NAMESPACE::fabsf(x) < 0x1.0p-10));
  };
  CHECK_DATA(0.0f, neg_inf, mpfr::Operation::Exp, fx, f_check, def_count,
             def_prec);
}

TEST_F(LlvmLibcExplogfTest, Log2InFloatRange) {
  CHECK_DATA(0.0f, inf, mpfr::Operation::Log2, LIBC_NAMESPACE::log2_eval,
             f_normal, def_count, def_prec);
}

TEST_F(LlvmLibcExplogfTest, LogInFloatRange) {
  CHECK_DATA(0.0f, inf, mpfr::Operation::Log, LIBC_NAMESPACE::log_eval,
             f_normal, def_count, def_prec);
}