1//===-- Unittests for exp2m1f ---------------------------------------------===//
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/libc_errno.h"
10#include "src/math/exp2m1f.h"
11#include "test/UnitTest/FPMatcher.h"
12#include "test/UnitTest/Test.h"
13
14using LlvmLibcExp2m1fTest = LIBC_NAMESPACE::testing::FPTest<float>;
15using LIBC_NAMESPACE::fputil::testing::ForceRoundingMode;
16using LIBC_NAMESPACE::fputil::testing::RoundingMode;
17
18TEST_F(LlvmLibcExp2m1fTest, SpecialNumbers) {
19 libc_errno = 0;
20
21 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp2m1f(sNaN), FE_INVALID);
22 EXPECT_MATH_ERRNO(0);
23
24 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::exp2m1f(aNaN));
25 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp2m1f(inf));
26 EXPECT_FP_EQ_ALL_ROUNDING(-1.0f, LIBC_NAMESPACE::exp2m1f(neg_inf));
27 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::exp2m1f(0.0f));
28 EXPECT_FP_EQ_ALL_ROUNDING(-0.0f, LIBC_NAMESPACE::exp2m1f(-0.0f));
29
30 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2m1f(1.0f));
31 EXPECT_FP_EQ_ALL_ROUNDING(-0.5f, LIBC_NAMESPACE::exp2m1f(-1.0f));
32 EXPECT_FP_EQ_ALL_ROUNDING(3.0f, LIBC_NAMESPACE::exp2m1f(2.0f));
33 EXPECT_FP_EQ_ALL_ROUNDING(-0.75f, LIBC_NAMESPACE::exp2m1f(-2.0f));
34}
35
36TEST_F(LlvmLibcExp2m1fTest, Overflow) {
37 libc_errno = 0;
38
39 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2m1f(0x1.fffffep+127),
40 FE_OVERFLOW);
41 EXPECT_MATH_ERRNO(ERANGE);
42
43 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2m1f(128.0f),
44 FE_OVERFLOW);
45 EXPECT_MATH_ERRNO(ERANGE);
46
47 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2m1f(0x1.000002p+7),
48 FE_OVERFLOW);
49 EXPECT_MATH_ERRNO(ERANGE);
50}
51
52TEST_F(LlvmLibcExp2m1fTest, Underflow) {
53 libc_errno = 0;
54
55 EXPECT_FP_EQ_WITH_EXCEPTION(-1.0f, LIBC_NAMESPACE::exp2m1f(-0x1.fffffep+127),
56 FE_UNDERFLOW);
57 EXPECT_MATH_ERRNO(ERANGE);
58
59 EXPECT_FP_EQ_WITH_EXCEPTION(-1.0f, LIBC_NAMESPACE::exp2m1f(-25.0f),
60 FE_UNDERFLOW);
61 EXPECT_MATH_ERRNO(ERANGE);
62
63 EXPECT_FP_EQ_WITH_EXCEPTION(-1.0f, LIBC_NAMESPACE::exp2m1f(-0x1.900002p4),
64 FE_UNDERFLOW);
65 EXPECT_MATH_ERRNO(ERANGE);
66}
67
68#ifdef LIBC_TEST_FTZ_DAZ
69
70using namespace LIBC_NAMESPACE::testing;
71
72TEST_F(LlvmLibcExp2m1fTest, FTZMode) {
73 ModifyMXCSR mxcsr(FTZ);
74
75 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp2m1f(min_denormal));
76 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp2m1f(max_denormal));
77}
78
79TEST_F(LlvmLibcExp2m1fTest, DAZMode) {
80 ModifyMXCSR mxcsr(DAZ);
81
82 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp2m1f(min_denormal));
83 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp2m1f(max_denormal));
84}
85
86TEST_F(LlvmLibcExp2m1fTest, FTZDAZMode) {
87 ModifyMXCSR mxcsr(FTZ | DAZ);
88
89 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp2m1f(min_denormal));
90 EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::exp2m1f(max_denormal));
91}
92
93#endif
94

source code of libc/test/src/math/smoke/exp2m1f_test.cpp