1 //===-- Unittests for sinf ------------------------------------------------===//
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 "src/__support/CPP/Array.h"
10 #include "src/__support/FPUtil/FPBits.h"
11 #include "src/math/sinf.h"
12 #include "test/src/math/sdcomp26094.h"
13 #include "utils/MPFRWrapper/MPFRUtils.h"
14 #include "utils/UnitTest/FPMatcher.h"
15 #include "utils/UnitTest/Test.h"
16 #include <math.h>
17
18 #include <errno.h>
19 #include <stdint.h>
20
21 using __llvm_libc::testing::SDCOMP26094_VALUES;
22 using FPBits = __llvm_libc::fputil::FPBits<float>;
23
24 namespace mpfr = __llvm_libc::testing::mpfr;
25
26 DECLARE_SPECIAL_CONSTANTS(float)
27
TEST(LlvmLibcSinfTest,SpecialNumbers)28 TEST(LlvmLibcSinfTest, SpecialNumbers) {
29 errno = 0;
30
31 EXPECT_FP_EQ(aNaN, __llvm_libc::sinf(aNaN));
32 EXPECT_MATH_ERRNO(0);
33
34 EXPECT_FP_EQ(0.0f, __llvm_libc::sinf(0.0f));
35 EXPECT_MATH_ERRNO(0);
36
37 EXPECT_FP_EQ(-0.0f, __llvm_libc::sinf(-0.0f));
38 EXPECT_MATH_ERRNO(0);
39
40 EXPECT_FP_EQ(aNaN, __llvm_libc::sinf(inf));
41 EXPECT_MATH_ERRNO(EDOM);
42
43 EXPECT_FP_EQ(aNaN, __llvm_libc::sinf(neg_inf));
44 EXPECT_MATH_ERRNO(EDOM);
45 }
46
TEST(LlvmLibcSinfTest,InFloatRange)47 TEST(LlvmLibcSinfTest, InFloatRange) {
48 constexpr uint32_t COUNT = 1000000;
49 constexpr uint32_t STEP = UINT32_MAX / COUNT;
50 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
51 float x = float(FPBits(v));
52 if (isnan(x) || isinf(x))
53 continue;
54 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
55 __llvm_libc::sinf(x), 0.5);
56 }
57 }
58
TEST(LlvmLibcSinfTest,SpecificBitPatterns)59 TEST(LlvmLibcSinfTest, SpecificBitPatterns) {
60 constexpr int N = 36;
61 constexpr uint32_t INPUTS[N] = {
62 0x3f06'0a92U, // x = pi/6
63 0x3f3a'dc51U, // x = 0x1.75b8a2p-1f
64 0x3f49'0fdbU, // x = pi/4
65 0x3f86'0a92U, // x = pi/3
66 0x3fa7'832aU, // x = 0x1.4f0654p+0f
67 0x3fc9'0fdbU, // x = pi/2
68 0x4017'1973U, // x = 0x1.2e32e6p+1f
69 0x4049'0fdbU, // x = pi
70 0x4096'cbe4U, // x = 0x1.2d97c8p+2f
71 0x40c9'0fdbU, // x = 2*pi
72 0x433b'7490U, // x = 0x1.76e92p+7f
73 0x437c'e5f1U, // x = 0x1.f9cbe2p+7f
74 0x4619'9998U, // x = 0x1.33333p+13f
75 0x474d'246fU, // x = 0x1.9a48dep+15f
76 0x4afd'ece4U, // x = 0x1.fbd9c8p+22f
77 0x4c23'32e9U, // x = 0x1.4665d2p+25f
78 0x50a3'e87fU, // x = 0x1.47d0fep+34f
79 0x5239'47f6U, // x = 0x1.728fecp+37f
80 0x53b1'46a6U, // x = 0x1.628d4cp+40f
81 0x55ca'fb2aU, // x = 0x1.95f654p+44f
82 0x588e'f060U, // x = 0x1.1de0cp+50f
83 0x5c07'bcd0U, // x = 0x1.0f79ap+57f
84 0x5ebc'fddeU, // x = 0x1.79fbbcp+62f
85 0x5fa6'eba7U, // x = 0x1.4dd74ep+64f
86 0x61a4'0b40U, // x = 0x1.48168p+68f
87 0x6386'134eU, // x = 0x1.0c269cp+72f
88 0x6589'8498U, // x = 0x1.13093p+76f
89 0x6600'0001U, // x = 0x1.000002p+77f
90 0x664e'46e4U, // x = 0x1.9c8dc8p+77f
91 0x66b0'14aaU, // x = 0x1.602954p+78f
92 0x67a9'242bU, // x = 0x1.524856p+80f
93 0x6a19'76f1U, // x = 0x1.32ede2p+85f
94 0x6c55'da58U, // x = 0x1.abb4bp+89f
95 0x6f79'be45U, // x = 0x1.f37c8ap+95f
96 0x7276'69d4U, // x = 0x1.ecd3a8p+101f
97 0x7758'4625U, // x = 0x1.b08c4ap+111f
98 };
99
100 for (int i = 0; i < N; ++i) {
101 float x = float(FPBits(INPUTS[i]));
102 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
103 __llvm_libc::sinf(x), 0.5);
104 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, -x,
105 __llvm_libc::sinf(-x), 0.5);
106 }
107 }
108
109 // For small values, sin(x) is x.
TEST(LlvmLibcSinfTest,SmallValues)110 TEST(LlvmLibcSinfTest, SmallValues) {
111 float x = float(FPBits(0x1780'0000U));
112 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x, __llvm_libc::sinf(x),
113 0.5);
114
115 x = float(FPBits(0x0040'0000U));
116 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x, __llvm_libc::sinf(x),
117 0.5);
118 }
119
120 // SDCOMP-26094: check sinf in the cases for which the range reducer
121 // returns values furthest beyond its nominal upper bound of pi/4.
TEST(LlvmLibcSinfTest,SDCOMP_26094)122 TEST(LlvmLibcSinfTest, SDCOMP_26094) {
123 for (uint32_t v : SDCOMP26094_VALUES) {
124 float x = float(FPBits((v)));
125 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
126 __llvm_libc::sinf(x), 0.5);
127 }
128 }
129