libc/test/src/mathvec/exp10f_test.cpp

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains unit tests for single-precision SIMD exp10.
///
//===----------------------------------------------------------------------===//

#include "hdr/math_macros.h"
#include "src/__support/CPP/simd.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/__support/math/exp10f_double_eval.h"
#include "src/mathvec/exp10f.h"
#include "test/UnitTest/Test.h"
#include "test/src/mathvec/UnitTestWrappers.h"

#include "hdr/stdint_proxy.h"

using LlvmLibcVecExp10fTest = LIBC_NAMESPACE::testing::FPTest<float>;

using Exp10fOp = LIBC_NAMESPACE::testing::mathvec::UnaryOp<
    float, LIBC_NAMESPACE::math::double_eval::exp10f, LIBC_NAMESPACE::exp10f>;
using LIBC_NAMESPACE::cpp::splat;
using LIBC_NAMESPACE::testing::mathvec::wrap_ref;
using LIBC_NAMESPACE::testing::mathvec::wrap_vector;

TEST_F(LlvmLibcVecExp10fTest, SpecialNumbers) {
  EXPECT_SIMD_EQ(splat(aNaN), wrap_vector<Exp10fOp>(aNaN));

  EXPECT_SIMD_EQ(splat(inf), wrap_vector<Exp10fOp>(inf));

  EXPECT_SIMD_EQ(splat(0.0f), wrap_vector<Exp10fOp>(neg_inf));

  EXPECT_SIMD_EQ(splat(1.0f), wrap_vector<Exp10fOp>(0.0f));

  EXPECT_SIMD_EQ(splat(1.0f), wrap_vector<Exp10fOp>(-0.0f));
}

TEST_F(LlvmLibcVecExp10fTest, Overflow) {
  float x = FPBits(0x7f7fffffU).get_val();
  EXPECT_SIMD_EQ(splat(inf), wrap_vector<Exp10fOp>(x));

  x = FPBits(0x421a209aU).get_val();
  EXPECT_SIMD_EQ(wrap_ref<Exp10fOp>(x), wrap_vector<Exp10fOp>(x));

  x = FPBits(0x421a209bU).get_val();
  EXPECT_SIMD_EQ(splat(inf), wrap_vector<Exp10fOp>(x));

  x = FPBits(0x421a209cU).get_val();
  EXPECT_SIMD_EQ(splat(inf), wrap_vector<Exp10fOp>(x));
}

TEST_F(LlvmLibcVecExp10fTest, Underflow) {
  float x = FPBits(0xff7fffffU).get_val();
  EXPECT_SIMD_EQ(splat(0.0f), wrap_vector<Exp10fOp>(x));

  // Values around log10(2^-150).
  x = FPBits(0xc2349e34U).get_val();
  EXPECT_SIMD_EQ(wrap_ref<Exp10fOp>(x, 1.0), wrap_vector<Exp10fOp>(x, 1.0));

  x = FPBits(0xc2349e35U).get_val();
  EXPECT_SIMD_EQ(wrap_ref<Exp10fOp>(x, 1.0), wrap_vector<Exp10fOp>(x, 1.0));

  x = FPBits(0xc2349e36U).get_val();
  EXPECT_SIMD_EQ(splat(0.0f), wrap_vector<Exp10fOp>(x));
}

TEST_F(LlvmLibcVecExp10fTest, InFloatRange) {
  TEST_MATHVEC_FLOAT_RANGE(Exp10fOp);
}