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 "hdr/math_macros.h"
10#include "src/__support/FPUtil/FPBits.h"
11#include "src/__support/libc_errno.h"
12#include "src/math/sinf.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15#include "test/src/math/sdcomp26094.h"
16#include "utils/MPFRWrapper/MPFRUtils.h"
17
18#include <stdint.h>
19
20using LlvmLibcSinfTest = LIBC_NAMESPACE::testing::FPTest<float>;
21
22using LIBC_NAMESPACE::testing::SDCOMP26094_VALUES;
23
24namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
25
26TEST_F(LlvmLibcSinfTest, SpecialNumbers) {
27 libc_errno = 0;
28
29 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinf(aNaN));
30 EXPECT_MATH_ERRNO(0);
31
32 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::sinf(0.0f));
33 EXPECT_MATH_ERRNO(0);
34
35 EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::sinf(-0.0f));
36 EXPECT_MATH_ERRNO(0);
37
38 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinf(inf));
39 EXPECT_MATH_ERRNO(EDOM);
40
41 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinf(neg_inf));
42 EXPECT_MATH_ERRNO(EDOM);
43}
44
45TEST_F(LlvmLibcSinfTest, InFloatRange) {
46 constexpr uint32_t COUNT = 100'000;
47 constexpr uint32_t STEP = UINT32_MAX / COUNT;
48 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
49 float x = FPBits(v).get_val();
50 if (FPBits(v).is_nan() || FPBits(v).is_inf())
51 continue;
52 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
53 LIBC_NAMESPACE::sinf(x), 0.5);
54 }
55}
56
57TEST_F(LlvmLibcSinfTest, SpecificBitPatterns) {
58 constexpr int N = 36;
59 constexpr uint32_t INPUTS[N] = {
60 0x3f06'0a92U, // x = pi/6
61 0x3f3a'dc51U, // x = 0x1.75b8a2p-1f
62 0x3f49'0fdbU, // x = pi/4
63 0x3f86'0a92U, // x = pi/3
64 0x3fa7'832aU, // x = 0x1.4f0654p+0f
65 0x3fc9'0fdbU, // x = pi/2
66 0x4017'1973U, // x = 0x1.2e32e6p+1f
67 0x4049'0fdbU, // x = pi
68 0x4096'cbe4U, // x = 0x1.2d97c8p+2f
69 0x40c9'0fdbU, // x = 2*pi
70 0x433b'7490U, // x = 0x1.76e92p+7f
71 0x437c'e5f1U, // x = 0x1.f9cbe2p+7f
72 0x4619'9998U, // x = 0x1.33333p+13f
73 0x474d'246fU, // x = 0x1.9a48dep+15f
74 0x4afd'ece4U, // x = 0x1.fbd9c8p+22f
75 0x4c23'32e9U, // x = 0x1.4665d2p+25f
76 0x50a3'e87fU, // x = 0x1.47d0fep+34f
77 0x5239'47f6U, // x = 0x1.728fecp+37f
78 0x53b1'46a6U, // x = 0x1.628d4cp+40f
79 0x55ca'fb2aU, // x = 0x1.95f654p+44f
80 0x588e'f060U, // x = 0x1.1de0cp+50f
81 0x5c07'bcd0U, // x = 0x1.0f79ap+57f
82 0x5ebc'fddeU, // x = 0x1.79fbbcp+62f
83 0x5fa6'eba7U, // x = 0x1.4dd74ep+64f
84 0x61a4'0b40U, // x = 0x1.48168p+68f
85 0x6386'134eU, // x = 0x1.0c269cp+72f
86 0x6589'8498U, // x = 0x1.13093p+76f
87 0x6600'0001U, // x = 0x1.000002p+77f
88 0x664e'46e4U, // x = 0x1.9c8dc8p+77f
89 0x66b0'14aaU, // x = 0x1.602954p+78f
90 0x67a9'242bU, // x = 0x1.524856p+80f
91 0x6a19'76f1U, // x = 0x1.32ede2p+85f
92 0x6c55'da58U, // x = 0x1.abb4bp+89f
93 0x6f79'be45U, // x = 0x1.f37c8ap+95f
94 0x7276'69d4U, // x = 0x1.ecd3a8p+101f
95 0x7758'4625U, // x = 0x1.b08c4ap+111f
96 };
97
98 for (int i = 0; i < N; ++i) {
99 float x = FPBits(INPUTS[i]).get_val();
100 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
101 LIBC_NAMESPACE::sinf(x), 0.5);
102 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, -x,
103 LIBC_NAMESPACE::sinf(-x), 0.5);
104 }
105}
106
107// For small values, sin(x) is x.
108TEST_F(LlvmLibcSinfTest, SmallValues) {
109 float x = FPBits(0x1780'0000U).get_val();
110 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
111 LIBC_NAMESPACE::sinf(x), 0.5);
112
113 x = FPBits(0x0040'0000U).get_val();
114 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
115 LIBC_NAMESPACE::sinf(x), 0.5);
116}
117
118// SDCOMP-26094: check sinf in the cases for which the range reducer
119// returns values furthest beyond its nominal upper bound of pi/4.
120TEST_F(LlvmLibcSinfTest, SDCOMP_26094) {
121 for (uint32_t v : SDCOMP26094_VALUES) {
122 float x = FPBits((v)).get_val();
123 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x,
124 LIBC_NAMESPACE::sinf(x), 0.5);
125 }
126}
127

source code of libc/test/src/math/sinf_test.cpp