1//===-- Unittests for exp -------------------------------------------------===//
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/exp.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15
16#include <stdint.h>
17
18using LlvmLibcExpTest = LIBC_NAMESPACE::testing::FPTest<double>;
19
20TEST_F(LlvmLibcExpTest, SpecialNumbers) {
21 EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp(sNaN), FE_INVALID);
22 EXPECT_MATH_ERRNO(0);
23
24 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp(aNaN));
25 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp(inf));
26 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp(neg_inf));
27 EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp(-0x1.0p20),
28 FE_UNDERFLOW);
29 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp(0x1.0p20), FE_OVERFLOW);
30 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp(0.0));
31 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp(-0.0));
32}
33
34#ifdef LIBC_TEST_FTZ_DAZ
35
36using namespace LIBC_NAMESPACE::testing;
37
38TEST_F(LlvmLibcExpTest, FTZMode) {
39 ModifyMXCSR mxcsr(FTZ);
40
41 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal));
42 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal));
43}
44
45TEST_F(LlvmLibcExpTest, DAZMode) {
46 ModifyMXCSR mxcsr(DAZ);
47
48 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal));
49 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal));
50}
51
52TEST_F(LlvmLibcExpTest, FTZDAZMode) {
53 ModifyMXCSR mxcsr(FTZ | DAZ);
54
55 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal));
56 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal));
57}
58
59#endif
60

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