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/__support/CPP/Array.h"
10 #include "src/__support/FPUtil/FPBits.h"
11 #include "src/math/sincosf.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(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_MATH_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_MATH_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_MATH_ERRNO(0);
46
47 __llvm_libc::sincosf(inf, &sin, &cos);
48 EXPECT_FP_EQ(aNaN, cos);
49 EXPECT_FP_EQ(aNaN, sin);
50 EXPECT_MATH_ERRNO(EDOM);
51
52 __llvm_libc::sincosf(neg_inf, &sin, &cos);
53 EXPECT_FP_EQ(aNaN, cos);
54 EXPECT_FP_EQ(aNaN, sin);
55 EXPECT_MATH_ERRNO(EDOM);
56 }
57
TEST(LlvmLibcSinCosfTest,InFloatRange)58 TEST(LlvmLibcSinCosfTest, InFloatRange) {
59 constexpr uint32_t COUNT = 1000000;
60 constexpr uint32_t STEP = UINT32_MAX / COUNT;
61 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
62 float x = float(FPBits((v)));
63 if (isnan(x) || isinf(x))
64 continue;
65
66 float sin, cos;
67 __llvm_libc::sincosf(x, &sin, &cos);
68 ASSERT_MPFR_MATCH(mpfr::Operation::Cos, x, cos, 1.0);
69 ASSERT_MPFR_MATCH(mpfr::Operation::Sin, x, sin, 1.0);
70 }
71 }
72
73 // For small values, cos(x) is 1 and sin(x) is x.
TEST(LlvmLibcSinCosfTest,SmallValues)74 TEST(LlvmLibcSinCosfTest, SmallValues) {
75 uint32_t bits = 0x17800000;
76 float x = float(FPBits((bits)));
77 float result_cos, result_sin;
78 __llvm_libc::sincosf(x, &result_sin, &result_cos);
79 EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result_cos, 1.0);
80 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, result_sin, 1.0);
81 EXPECT_FP_EQ(1.0f, result_cos);
82 EXPECT_FP_EQ(x, result_sin);
83
84 bits = 0x00400000;
85 x = float(FPBits((bits)));
86 __llvm_libc::sincosf(x, &result_sin, &result_cos);
87 EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, result_cos, 1.0);
88 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, result_sin, 1.0);
89 EXPECT_FP_EQ(1.0f, result_cos);
90 EXPECT_FP_EQ(x, result_sin);
91 }
92
93 // SDCOMP-26094: check sinf in the cases for which the range reducer
94 // returns values furthest beyond its nominal upper bound of pi/4.
TEST(LlvmLibcSinCosfTest,SDCOMP_26094)95 TEST(LlvmLibcSinCosfTest, SDCOMP_26094) {
96 for (uint32_t v : SDCOMP26094_VALUES) {
97 float x = float(FPBits((v)));
98 float sin, cos;
99 __llvm_libc::sincosf(x, &sin, &cos);
100 EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, cos, 1.0);
101 EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, sin, 1.0);
102 }
103 }
104