77e1d9beed
Performance by core-math (core-math/glibc 2.31/current llvm-14): 28.879/20.843/20.15 Differential Revision: https://reviews.llvm.org/D132842
66 lines
2.1 KiB
C++
66 lines
2.1 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 "src/__support/FPUtil/FPBits.h"
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#include "src/math/atanf.h"
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#include "utils/MPFRWrapper/MPFRUtils.h"
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#include "utils/UnitTest/FPMatcher.h"
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#include "utils/UnitTest/Test.h"
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#include <math.h>
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#include <errno.h>
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#include <stdint.h>
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#include <initializer_list>
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using FPBits = __llvm_libc::fputil::FPBits<float>;
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namespace mpfr = __llvm_libc::testing::mpfr;
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DECLARE_SPECIAL_CONSTANTS(float)
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TEST(LlvmLibcAtanfTest, SpecialNumbers) {
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errno = 0;
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__llvm_libc::fputil::clear_except(FE_ALL_EXCEPT);
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EXPECT_FP_EQ(aNaN, __llvm_libc::atanf(aNaN));
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EXPECT_FP_EXCEPTION(FE_INVALID);
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EXPECT_MATH_ERRNO(0);
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__llvm_libc::fputil::clear_except(FE_ALL_EXCEPT);
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EXPECT_FP_EQ(0.0f, __llvm_libc::atanf(0.0f));
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EXPECT_FP_EXCEPTION(0);
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EXPECT_MATH_ERRNO(0);
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__llvm_libc::fputil::clear_except(FE_ALL_EXCEPT);
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EXPECT_FP_EQ(-0.0f, __llvm_libc::atanf(-0.0f));
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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(LlvmLibcAtanfTest, InFloatRange) {
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constexpr uint32_t COUNT = 1000000;
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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 = float(FPBits(v));
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Atan, x,
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__llvm_libc::atanf(x), 0.5);
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Atan, -x,
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__llvm_libc::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(LlvmLibcAtanfTest, SpecialValues) {
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for (uint32_t v : {0x3d8d6b23U, 0x3feefcfbU, 0xbd8d6b23U, 0xbfeefcfbU,
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0x7F800000U, 0xFF800000U}) {
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float x = float(FPBits(v));
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EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Atan, x,
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__llvm_libc::atanf(x), 0.5);
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}
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}
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