1//===-- Unittests for expf ------------------------------------------------===//
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/expf.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15
16#include <stdint.h>
17
18using LlvmLibcExpfTest = LIBC_NAMESPACE::testing::FPTest<float>;
19
20TEST_F(LlvmLibcExpfTest, SpecialNumbers) {
21 libc_errno = 0;
22
23 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::expf(sNaN), FE_INVALID);
24 EXPECT_MATH_ERRNO(0);
25
26 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::expf(aNaN));
27 EXPECT_MATH_ERRNO(0);
28
29 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::expf(inf));
30 EXPECT_MATH_ERRNO(0);
31
32 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::expf(neg_inf));
33 EXPECT_MATH_ERRNO(0);
34
35 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::expf(0.0f));
36 EXPECT_MATH_ERRNO(0);
37
38 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::expf(-0.0f));
39 EXPECT_MATH_ERRNO(0);
40}
41
42TEST_F(LlvmLibcExpfTest, Overflow) {
43 libc_errno = 0;
44 EXPECT_FP_EQ_WITH_EXCEPTION(
45 inf, LIBC_NAMESPACE::expf(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);
46 EXPECT_MATH_ERRNO(ERANGE);
47
48 EXPECT_FP_EQ_WITH_EXCEPTION(
49 inf, LIBC_NAMESPACE::expf(FPBits(0x42cffff8U).get_val()), FE_OVERFLOW);
50 EXPECT_MATH_ERRNO(ERANGE);
51
52 EXPECT_FP_EQ_WITH_EXCEPTION(
53 inf, LIBC_NAMESPACE::expf(FPBits(0x42d00008U).get_val()), FE_OVERFLOW);
54 EXPECT_MATH_ERRNO(ERANGE);
55}
56
57#ifdef LIBC_TEST_FTZ_DAZ
58
59using namespace LIBC_NAMESPACE::testing;
60
61TEST_F(LlvmLibcExpfTest, FTZMode) {
62 ModifyMXCSR mxcsr(FTZ);
63
64 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal));
65 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal));
66}
67
68TEST_F(LlvmLibcExpfTest, DAZMode) {
69 ModifyMXCSR mxcsr(DAZ);
70
71 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal));
72 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal));
73}
74
75TEST_F(LlvmLibcExpfTest, FTZDAZMode) {
76 ModifyMXCSR mxcsr(FTZ | DAZ);
77
78 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal));
79 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal));
80}
81
82#endif
83

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