libc/test/src/math/smoke/exp10f_test.cpp

//===-- Unittests for exp10f ----------------------------------------------===//
//
// 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/errno_macros.h"
#include "hdr/math_macros.h"
#include "hdr/stdint_proxy.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/math/exp10f.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"

using LlvmLibcExp10fTest = LIBC_NAMESPACE::testing::FPTest<float>;

TEST_F(LlvmLibcExp10fTest, SpecialNumbers) {
  EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp10f(sNaN), FE_INVALID);
  EXPECT_MATH_ERRNO(0);

  EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::exp10f(aNaN));
  EXPECT_MATH_ERRNO(0);

  EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp10f(inf));
  EXPECT_MATH_ERRNO(0);

  EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::exp10f(neg_inf));
  EXPECT_MATH_ERRNO(0);

  EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp10f(0.0f));
  EXPECT_MATH_ERRNO(0);

  EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp10f(-0.0f));
  EXPECT_MATH_ERRNO(0);

  EXPECT_FP_EQ_ALL_ROUNDING(10.0f, LIBC_NAMESPACE::exp10f(1.0f));
  EXPECT_FP_EQ_ALL_ROUNDING(100.0f, LIBC_NAMESPACE::exp10f(2.0f));
  EXPECT_FP_EQ_ALL_ROUNDING(1000.0f, LIBC_NAMESPACE::exp10f(3.0f));
}

TEST_F(LlvmLibcExp10fTest, Overflow) {
  EXPECT_FP_EQ_WITH_EXCEPTION(
      inf, LIBC_NAMESPACE::exp10f(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);
  EXPECT_MATH_ERRNO(ERANGE);

  EXPECT_FP_EQ_WITH_EXCEPTION(
      inf, LIBC_NAMESPACE::exp10f(FPBits(0x43000000U).get_val()), FE_OVERFLOW);
  EXPECT_MATH_ERRNO(ERANGE);

  EXPECT_FP_EQ_WITH_EXCEPTION(
      inf, LIBC_NAMESPACE::exp10f(FPBits(0x43000001U).get_val()), FE_OVERFLOW);
  EXPECT_MATH_ERRNO(ERANGE);
}

#ifdef LIBC_TEST_FTZ_DAZ

using namespace LIBC_NAMESPACE::testing;

TEST_F(LlvmLibcExp10fTest, FTZMode) {
  ModifyMXCSR mxcsr(FTZ);

  EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(min_denormal));
  EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(max_denormal));
}

TEST_F(LlvmLibcExp10fTest, DAZMode) {
  ModifyMXCSR mxcsr(DAZ);

  EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(min_denormal));
  EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(max_denormal));
}

TEST_F(LlvmLibcExp10fTest, FTZDAZMode) {
  ModifyMXCSR mxcsr(FTZ | DAZ);

  EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(min_denormal));
  EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp10f(max_denormal));
}

#endif