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 "src/math/sincosf.h"
10 #include "test/src/math/sdcomp26094.h"
11 #include "utils/CPP/Array.h"
12 #include "utils/FPUtil/FPBits.h"
13 #include "utils/FPUtil/TestHelpers.h"
14 #include "utils/MPFRWrapper/MPFRUtils.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::sdcomp26094Values;
22 using FPBits = __llvm_libc::fputil::FPBits<float>;
23
24 namespace mpfr = __llvm_libc::testing::mpfr;
25
26 DECLARE_SPECIAL_CONSTANTS(float)
27
TEST(LlvmLibcSinCosfTest,SpecialNumbers)28 TEST(LlvmLibcSinCosfTest, SpecialNumbers) {
29 errno = 0;
30 float sin, cos;
31
32 __llvm_libc::sincosf(aNaN, &sin, &cos);
33 EXPECT_FP_EQ(aNaN, cos);
34 EXPECT_FP_EQ(aNaN, sin);
35 EXPECT_EQ(errno, 0);
36
37 __llvm_libc::sincosf(0.0f, &sin, &cos);
38 EXPECT_FP_EQ(1.0f, cos);
39 EXPECT_FP_EQ(0.0f, sin);
40 EXPECT_EQ(errno, 0);
41
42 __llvm_libc::sincosf(-0.0f, &sin, &cos);
43 EXPECT_FP_EQ(1.0f, cos);
44 EXPECT_FP_EQ(-0.0f, sin);
45 EXPECT_EQ(errno, 0);
46
47 errno = 0;
48 __llvm_libc::sincosf(inf, &sin, &cos);
49 EXPECT_FP_EQ(aNaN, cos);
50 EXPECT_FP_EQ(aNaN, sin);
51 EXPECT_EQ(errno, EDOM);
52
53 errno = 0;
54 __llvm_libc::sincosf(negInf, &sin, &cos);
55 EXPECT_FP_EQ(aNaN, cos);
56 EXPECT_FP_EQ(aNaN, sin);
57 EXPECT_EQ(errno, EDOM);
58 }
59
TEST(LlvmLibcSinCosfTest,InFloatRange)60 TEST(LlvmLibcSinCosfTest, InFloatRange) {
61 constexpr uint32_t count = 1000000;
62 constexpr uint32_t step = UINT32_MAX / count;
63 for (uint32_t i = 0, v = 0; i <= count; ++i, v += step) {
64 float x = float(FPBits((v)));
65 if (isnan(x) || isinf(x))
66 continue;
67
68 float sin, cos;
69 __llvm_libc::sincosf(x, &sin, &cos);
70 ASSERT_MPFR_MATCH(mpfr::Operation::Cos, x, cos, 1.0);
71 ASSERT_MPFR_MATCH(mpfr::Operation::Sin, x, sin, 1.0);
72 }
73 }
74
75 // For small values, cos(x) is 1 and sin(x) is x.
TEST(LlvmLibcSinCosfTest,SmallValues)76 TEST(LlvmLibcSinCosfTest, SmallValues) {
77 uint32_t bits = 0x17800000;
78 float x = float(FPBits((bits)));
79 float result_cos, result_sin;
80 __llvm_libc::sincosf(x, &result_sin, &result_cos);
81 EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result_cos, 1.0);
82 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, result_sin, 1.0);
83 EXPECT_FP_EQ(1.0f, result_cos);
84 EXPECT_FP_EQ(x, result_sin);
85
86 bits = 0x00400000;
87 x = float(FPBits((bits)));
88 __llvm_libc::sincosf(x, &result_sin, &result_cos);
89 EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result_cos, 1.0);
90 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, result_sin, 1.0);
91 EXPECT_FP_EQ(1.0f, result_cos);
92 EXPECT_FP_EQ(x, result_sin);
93 }
94
95 // SDCOMP-26094: check sinf in the cases for which the range reducer
96 // returns values furthest beyond its nominal upper bound of pi/4.
TEST(LlvmLibcSinCosfTest,SDCOMP_26094)97 TEST(LlvmLibcSinCosfTest, SDCOMP_26094) {
98 for (uint32_t v : sdcomp26094Values) {
99 float x = float(FPBits((v)));
100 float sin, cos;
101 __llvm_libc::sincosf(x, &sin, &cos);
102 EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, cos, 1.0);
103 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, sin, 1.0);
104 }
105 }
106