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/errno/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
18 using LlvmLibcExpTest = LIBC_NAMESPACE::testing::FPTest<double>;
19
TEST_F(LlvmLibcExpTest,SpecialNumbers)20 TEST_F(LlvmLibcExpTest, SpecialNumbers) {
21 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp(aNaN));
22 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp(inf));
23 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp(neg_inf));
24 EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp(-0x1.0p20),
25 FE_UNDERFLOW);
26 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp(0x1.0p20), FE_OVERFLOW);
27 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp(0.0));
28 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp(-0.0));
29 }
30
31 #ifdef LIBC_TEST_FTZ_DAZ
32
33 using namespace LIBC_NAMESPACE::testing;
34
TEST_F(LlvmLibcExpTest,FTZMode)35 TEST_F(LlvmLibcExpTest, FTZMode) {
36 ModifyMXCSR mxcsr(FTZ);
37
38 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal));
39 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal));
40 }
41
TEST_F(LlvmLibcExpTest,DAZMode)42 TEST_F(LlvmLibcExpTest, DAZMode) {
43 ModifyMXCSR mxcsr(DAZ);
44
45 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal));
46 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal));
47 }
48
TEST_F(LlvmLibcExpTest,FTZDAZMode)49 TEST_F(LlvmLibcExpTest, FTZDAZMode) {
50 ModifyMXCSR mxcsr(FTZ | DAZ);
51
52 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal));
53 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal));
54 }
55
56 #endif
57