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//===-- Unittests for exp2m1f ---------------------------------------------===//
//
// 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 "src/__support/CPP/array.h"
#include "src/__support/FPUtil/FPBits.h"
#include "src/errno/libc_errno.h"
#include "src/math/exp2m1f.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
#include <stdint.h>
using LlvmLibcExp2m1fTest = LIBC_NAMESPACE::testing::FPTest<float>;
namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
TEST_F(LlvmLibcExp2m1fTest, TrickyInputs) {
constexpr LIBC_NAMESPACE::cpp::array<float, 10> INPUTS = {
// EXP2M1F_EXCEPTS_LO
0x1.36dc8ep-36,
0x1.224936p-19,
0x1.d16d2p-20,
0x1.17949ep-14,
-0x1.9c3e1ep-38,
-0x1.4d89b4p-32,
-0x1.a6eac4p-10,
-0x1.e7526ep-6,
// EXP2M1F_EXCEPTS_HI
0x1.16a972p-1,
-0x1.9f12acp-5,
};
for (float x : INPUTS) {
LIBC_NAMESPACE::libc_errno = 0;
EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp2m1, x,
LIBC_NAMESPACE::exp2m1f(x), 0.5);
}
}
TEST_F(LlvmLibcExp2m1fTest, InFloatRange) {
constexpr uint32_t COUNT = 100'000;
constexpr uint32_t STEP = UINT32_MAX / COUNT;
for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
float x = FPBits(v).get_val();
if (isnan(x) || isinf(x))
continue;
LIBC_NAMESPACE::libc_errno = 0;
float result = LIBC_NAMESPACE::exp2m1f(x);
// If the computation resulted in an error or did not produce valid result
// in the single-precision floating point range, then ignore comparing with
// MPFR result as MPFR can still produce valid results because of its
// wider precision.
if (isnan(result) || isinf(result) || LIBC_NAMESPACE::libc_errno != 0)
continue;
ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Exp2m1, x,
LIBC_NAMESPACE::exp2m1f(x), 0.5);
}
}
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