1 //===-- Unittests for sincosf ---------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "include/math.h" 10 #include "src/errno/llvmlibc_errno.h" 11 #include "src/math/math_utils.h" 12 #include "src/math/sincosf.h" 13 #include "test/src/math/float.h" 14 #include "test/src/math/sdcomp26094.h" 15 #include "utils/CPP/Array.h" 16 #include "utils/MPFRWrapper/MPFRUtils.h" 17 #include "utils/UnitTest/Test.h" 18 19 #include <stdint.h> 20 21 using __llvm_libc::as_float; 22 using __llvm_libc::as_uint32_bits; 23 24 using __llvm_libc::testing::FloatBits; 25 using __llvm_libc::testing::sdcomp26094Values; 26 27 namespace mpfr = __llvm_libc::testing::mpfr; 28 // 12 additional bits of precision over the base precision of a |float| 29 // value. 30 static constexpr mpfr::Tolerance tolerance{mpfr::Tolerance::floatPrecision, 12, 31 3 * 0x1000 / 4}; 32 33 TEST(SinCosfTest, SpecialNumbers) { 34 llvmlibc_errno = 0; 35 float sin, cos; 36 37 __llvm_libc::sincosf(as_float(FloatBits::QNan), &sin, &cos); 38 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(cos))); 39 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(sin))); 40 EXPECT_EQ(llvmlibc_errno, 0); 41 42 __llvm_libc::sincosf(as_float(FloatBits::NegQNan), &sin, &cos); 43 EXPECT_TRUE(FloatBits::isNegQNan(as_uint32_bits(cos))); 44 EXPECT_TRUE(FloatBits::isNegQNan(as_uint32_bits(sin))); 45 EXPECT_EQ(llvmlibc_errno, 0); 46 47 __llvm_libc::sincosf(as_float(FloatBits::SNan), &sin, &cos); 48 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(cos))); 49 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(sin))); 50 EXPECT_EQ(llvmlibc_errno, 0); 51 52 __llvm_libc::sincosf(as_float(FloatBits::NegSNan), &sin, &cos); 53 EXPECT_TRUE(FloatBits::isNegQNan(as_uint32_bits(cos))); 54 EXPECT_TRUE(FloatBits::isNegQNan(as_uint32_bits(sin))); 55 EXPECT_EQ(llvmlibc_errno, 0); 56 57 __llvm_libc::sincosf(as_float(FloatBits::Zero), &sin, &cos); 58 EXPECT_EQ(FloatBits::One, as_uint32_bits(cos)); 59 EXPECT_EQ(FloatBits::Zero, as_uint32_bits(sin)); 60 EXPECT_EQ(llvmlibc_errno, 0); 61 62 __llvm_libc::sincosf(as_float(FloatBits::NegZero), &sin, &cos); 63 EXPECT_EQ(FloatBits::One, as_uint32_bits(cos)); 64 EXPECT_EQ(FloatBits::NegZero, as_uint32_bits(sin)); 65 EXPECT_EQ(llvmlibc_errno, 0); 66 67 llvmlibc_errno = 0; 68 __llvm_libc::sincosf(as_float(FloatBits::Inf), &sin, &cos); 69 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(cos))); 70 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(sin))); 71 EXPECT_EQ(llvmlibc_errno, EDOM); 72 73 llvmlibc_errno = 0; 74 __llvm_libc::sincosf(as_float(FloatBits::NegInf), &sin, &cos); 75 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(cos))); 76 EXPECT_TRUE(FloatBits::isQNan(as_uint32_bits(sin))); 77 EXPECT_EQ(llvmlibc_errno, EDOM); 78 } 79 80 TEST(SinCosfTest, InFloatRange) { 81 constexpr uint32_t count = 1000000; 82 constexpr uint32_t step = UINT32_MAX / count; 83 for (uint32_t i = 0, v = 0; i <= count; ++i, v += step) { 84 float x = as_float(v); 85 if (isnan(x) || isinf(x)) 86 continue; 87 88 float sin, cos; 89 __llvm_libc::sincosf(x, &sin, &cos); 90 ASSERT_MPFR_MATCH(mpfr::OP_Cos, x, cos, tolerance); 91 ASSERT_MPFR_MATCH(mpfr::OP_Sin, x, sin, tolerance); 92 } 93 } 94 95 // For small values, cos(x) is 1 and sin(x) is x. 96 TEST(SinCosfTest, SmallValues) { 97 uint32_t bits = 0x17800000; 98 float x = as_float(bits); 99 float result_cos, result_sin; 100 __llvm_libc::sincosf(x, &result_sin, &result_cos); 101 EXPECT_MPFR_MATCH(mpfr::OP_Cos, x, result_cos, tolerance); 102 EXPECT_MPFR_MATCH(mpfr::OP_Sin, x, result_sin, tolerance); 103 EXPECT_EQ(FloatBits::One, as_uint32_bits(result_cos)); 104 EXPECT_EQ(bits, as_uint32_bits(result_sin)); 105 106 bits = 0x00400000; 107 x = as_float(bits); 108 __llvm_libc::sincosf(x, &result_sin, &result_cos); 109 EXPECT_MPFR_MATCH(mpfr::OP_Cos, x, result_cos, tolerance); 110 EXPECT_MPFR_MATCH(mpfr::OP_Sin, x, result_sin, tolerance); 111 EXPECT_EQ(FloatBits::One, as_uint32_bits(result_cos)); 112 EXPECT_EQ(bits, as_uint32_bits(result_sin)); 113 } 114 115 // SDCOMP-26094: check sinf in the cases for which the range reducer 116 // returns values furthest beyond its nominal upper bound of pi/4. 117 TEST(SinCosfTest, SDCOMP_26094) { 118 for (uint32_t v : sdcomp26094Values) { 119 float x = as_float(v); 120 float sin, cos; 121 __llvm_libc::sincosf(x, &sin, &cos); 122 EXPECT_MPFR_MATCH(mpfr::OP_Cos, x, cos, tolerance); 123 EXPECT_MPFR_MATCH(mpfr::OP_Sin, x, sin, tolerance); 124 } 125 } 126