81 lines
3.0 KiB
C++
81 lines
3.0 KiB
C++
//===-- Unittests for atanf -----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "hdr/math_macros.h"
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#include "src/__support/FPUtil/FPBits.h"
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#include "src/errno/libc_errno.h"
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#include "src/math/atanf.h"
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#include "test/UnitTest/FPMatcher.h"
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#include "test/UnitTest/Test.h"
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#include "utils/MPFRWrapper/MPFRUtils.h"
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#include <stdint.h>
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using LlvmLibcAtanfTest = LIBC_NAMESPACE::testing::FPTest<float>;
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namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
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// TODO: This test needs to have its checks for exceptions, errno
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// tightened
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TEST_F(LlvmLibcAtanfTest, SpecialNumbers) {
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LIBC_NAMESPACE::libc_errno = 0;
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LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
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EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::atanf(aNaN));
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// TODO: Uncomment these checks later, RoundingMode affects running
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// tests in this way https://github.com/llvm/llvm-project/issues/90653.
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// EXPECT_FP_EXCEPTION(0);
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EXPECT_MATH_ERRNO(0);
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LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
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EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::atanf(0.0f));
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// TODO: Uncomment these checks later, RoundingMode affects running
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// tests in this way https://github.com/llvm/llvm-project/issues/90653.
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// EXPECT_FP_EXCEPTION(0);
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EXPECT_MATH_ERRNO(0);
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LIBC_NAMESPACE::fputil::clear_except(FE_ALL_EXCEPT);
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EXPECT_FP_EQ_ALL_ROUNDING(-0.0f, LIBC_NAMESPACE::atanf(-0.0f));
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// TODO: Uncomment these checks later, RoundingMode affects running
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// tests in this way https://github.com/llvm/llvm-project/issues/90653.
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// EXPECT_FP_EXCEPTION(0);
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EXPECT_MATH_ERRNO(0);
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}
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TEST_F(LlvmLibcAtanfTest, InFloatRange) {
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constexpr uint32_t COUNT = 100'000;
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const uint32_t STEP = FPBits(inf).uintval() / COUNT;
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for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
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float x = FPBits(v).get_val();
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Atan, x,
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LIBC_NAMESPACE::atanf(x), 0.5);
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Atan, -x,
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LIBC_NAMESPACE::atanf(-x), 0.5);
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}
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}
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// For small values, tanh(x) is x.
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TEST_F(LlvmLibcAtanfTest, SpecialValues) {
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uint32_t val_arr[] = {
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0x3d8d6b23U, // x = 0x1.1ad646p-4f
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0x3dbb6ac7U, // x = 0x1.76d58ep-4f
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0x3feefcfbU, // x = 0x1.ddf9f6p+0f
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0x3ffe2ec1U, // x = 0x1.fc5d82p+0f
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0xbd8d6b23U, // x = -0x1.1ad646p-4f
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0xbdbb6ac7U, // x = -0x1.76d58ep-4f
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0xbfeefcfbU, // x = -0x1.ddf9f6p+0f
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0xbffe2ec1U, // x = -0x1.fc5d82p+0
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0x7F800000U, // x = +Inf
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0xFF800000U, // x = -Inf
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};
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for (uint32_t v : val_arr) {
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float x = FPBits(v).get_val();
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Atan, x,
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LIBC_NAMESPACE::atanf(x), 0.5);
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}
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}
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