| //===-- 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/math/cosf.h" |
| #include "test/src/math/sdcomp26094.h" |
| #include "utils/CPP/Array.h" |
| #include "utils/FPUtil/BitPatterns.h" |
| #include "utils/FPUtil/ClassificationFunctions.h" |
| #include "utils/FPUtil/FloatOperations.h" |
| #include "utils/FPUtil/FloatProperties.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| #include "utils/UnitTest/Test.h" |
| #include <math.h> |
| |
| #include <errno.h> |
| #include <stdint.h> |
| |
| using __llvm_libc::fputil::isNegativeQuietNaN; |
| using __llvm_libc::fputil::isQuietNaN; |
| using __llvm_libc::fputil::valueAsBits; |
| using __llvm_libc::fputil::valueFromBits; |
| |
| using BitPatterns = __llvm_libc::fputil::BitPatterns<float>; |
| |
| using __llvm_libc::testing::sdcomp26094Values; |
| |
| namespace mpfr = __llvm_libc::testing::mpfr; |
| |
| TEST(LlvmLibcCosfTest, SpecialNumbers) { |
| errno = 0; |
| |
| EXPECT_TRUE( |
| isQuietNaN(__llvm_libc::cosf(valueFromBits(BitPatterns::aQuietNaN)))); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_TRUE(isNegativeQuietNaN( |
| __llvm_libc::cosf(valueFromBits(BitPatterns::aNegativeQuietNaN)))); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_TRUE(isQuietNaN( |
| __llvm_libc::cosf(valueFromBits(BitPatterns::aSignallingNaN)))); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_TRUE(isNegativeQuietNaN( |
| __llvm_libc::cosf(valueFromBits(BitPatterns::aNegativeSignallingNaN)))); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_EQ(BitPatterns::one, |
| valueAsBits(__llvm_libc::cosf(valueFromBits(BitPatterns::zero)))); |
| EXPECT_EQ(errno, 0); |
| |
| EXPECT_EQ(BitPatterns::one, valueAsBits(__llvm_libc::cosf( |
| valueFromBits(BitPatterns::negZero)))); |
| EXPECT_EQ(errno, 0); |
| |
| errno = 0; |
| EXPECT_TRUE(isQuietNaN(__llvm_libc::cosf(valueFromBits(BitPatterns::inf)))); |
| EXPECT_EQ(errno, EDOM); |
| |
| errno = 0; |
| EXPECT_TRUE( |
| isQuietNaN(__llvm_libc::cosf(valueFromBits(BitPatterns::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 = valueFromBits(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 = valueFromBits(0x17800000U); |
| float result = __llvm_libc::cosf(x); |
| EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result, 1.0); |
| EXPECT_EQ(BitPatterns::one, valueAsBits(result)); |
| |
| x = valueFromBits(0x0040000U); |
| result = __llvm_libc::cosf(x); |
| EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result, 1.0); |
| EXPECT_EQ(BitPatterns::one, valueAsBits(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 = valueFromBits(v); |
| ASSERT_MPFR_MATCH(mpfr::Operation::Cos, x, __llvm_libc::cosf(x), 1.0); |
| } |
| } |