| //===-- Unittests for cosf ------------------------------------------------===// |
| // |
| // 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 "src/__support/CPP/Array.h" |
| #include "src/__support/FPUtil/FPBits.h" |
| #include "src/math/cosf.h" |
| #include "test/src/math/sdcomp26094.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| #include "utils/UnitTest/FPMatcher.h" |
| #include "utils/UnitTest/Test.h" |
| #include <math.h> |
| |
| #include <errno.h> |
| #include <stdint.h> |
| |
| using __llvm_libc::testing::sdcomp26094Values; |
| using FPBits = __llvm_libc::fputil::FPBits<float>; |
| |
| namespace mpfr = __llvm_libc::testing::mpfr; |
| |
| DECLARE_SPECIAL_CONSTANTS(float) |
| |
| TEST(LlvmLibcCosfTest, SpecialNumbers) { |
| errno = 0; |
| |
| EXPECT_FP_EQ(aNaN, __llvm_libc::cosf(aNaN)); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_FP_EQ(1.0f, __llvm_libc::cosf(0.0f)); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_FP_EQ(1.0f, __llvm_libc::cosf(-0.0f)); |
| EXPECT_EQ(errno, 0); |
| |
| errno = 0; |
| EXPECT_FP_EQ(aNaN, __llvm_libc::cosf(inf)); |
| EXPECT_EQ(errno, EDOM); |
| |
| errno = 0; |
| EXPECT_FP_EQ(aNaN, __llvm_libc::cosf(negInf)); |
| EXPECT_EQ(errno, EDOM); |
| } |
| |
| TEST(LlvmLibcCosfTest, InFloatRange) { |
| constexpr uint32_t count = 1000000; |
| constexpr uint32_t step = UINT32_MAX / count; |
| for (uint32_t i = 0, v = 0; i <= count; ++i, v += step) { |
| float x = float(FPBits(v)); |
| if (isnan(x) || isinf(x)) |
| continue; |
| ASSERT_MPFR_MATCH(mpfr::Operation::Cos, x, __llvm_libc::cosf(x), 1.0); |
| } |
| } |
| |
| // For small values, cos(x) is 1. |
| TEST(LlvmLibcCosfTest, SmallValues) { |
| float x = float(FPBits(0x17800000U)); |
| float result = __llvm_libc::cosf(x); |
| EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result, 1.0); |
| EXPECT_FP_EQ(1.0f, result); |
| |
| x = float(FPBits(0x0040000U)); |
| result = __llvm_libc::cosf(x); |
| EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result, 1.0); |
| EXPECT_FP_EQ(1.0f, result); |
| } |
| |
| // SDCOMP-26094: check cosf in the cases for which the range reducer |
| // returns values furthest beyond its nominal upper bound of pi/4. |
| TEST(LlvmLibcCosfTest, SDCOMP_26094) { |
| for (uint32_t v : sdcomp26094Values) { |
| float x = float(FPBits(v)); |
| ASSERT_MPFR_MATCH(mpfr::Operation::Cos, x, __llvm_libc::cosf(x), 1.0); |
| } |
| } |