xref: /aosp_15_r20/external/llvm-libc/test/src/math/smoke/exp2f16_test.cpp (revision 71db0c75aadcf003ffe3238005f61d7618a3fead)
1 //===-- Unittests for exp2f16 ---------------------------------------------===//
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/fenv_macros.h"
10 #include "src/__support/FPUtil/cast.h"
11 #include "src/errno/libc_errno.h"
12 #include "src/math/exp2f16.h"
13 #include "test/UnitTest/FPMatcher.h"
14 #include "test/UnitTest/Test.h"
15 
16 using LlvmLibcExp2f16Test = LIBC_NAMESPACE::testing::FPTest<float16>;
17 
TEST_F(LlvmLibcExp2f16Test,SpecialNumbers)18 TEST_F(LlvmLibcExp2f16Test, SpecialNumbers) {
19   LIBC_NAMESPACE::libc_errno = 0;
20 
21   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::exp2f16(aNaN));
22   EXPECT_MATH_ERRNO(0);
23 
24   EXPECT_FP_EQ_WITH_EXCEPTION(aNaN, LIBC_NAMESPACE::exp2f16(sNaN), FE_INVALID);
25   EXPECT_MATH_ERRNO(0);
26 
27   EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp2f16(inf));
28   EXPECT_MATH_ERRNO(0);
29 
30   EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp2f16(neg_inf));
31   EXPECT_MATH_ERRNO(0);
32 
33   EXPECT_FP_EQ_ALL_ROUNDING(LIBC_NAMESPACE::fputil::cast<float16>(1.0f),
34                             LIBC_NAMESPACE::exp2f16(zero));
35   EXPECT_MATH_ERRNO(0);
36 
37   EXPECT_FP_EQ_ALL_ROUNDING(LIBC_NAMESPACE::fputil::cast<float16>(1.0f),
38                             LIBC_NAMESPACE::exp2f16(neg_zero));
39   EXPECT_MATH_ERRNO(0);
40 }
41 
TEST_F(LlvmLibcExp2f16Test,Overflow)42 TEST_F(LlvmLibcExp2f16Test, Overflow) {
43   LIBC_NAMESPACE::libc_errno = 0;
44 
45   EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2f16(max_normal),
46                               FE_OVERFLOW);
47   EXPECT_MATH_ERRNO(ERANGE);
48 
49   EXPECT_FP_EQ_WITH_EXCEPTION(
50       inf, LIBC_NAMESPACE::exp2f16(LIBC_NAMESPACE::fputil::cast<float16>(16.0)),
51       FE_OVERFLOW);
52   EXPECT_MATH_ERRNO(ERANGE);
53 }
54 
TEST_F(LlvmLibcExp2f16Test,Underflow)55 TEST_F(LlvmLibcExp2f16Test, Underflow) {
56   LIBC_NAMESPACE::libc_errno = 0;
57 
58   EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp2f16(neg_max_normal),
59                               FE_UNDERFLOW | FE_INEXACT);
60   EXPECT_MATH_ERRNO(ERANGE);
61 
62   EXPECT_FP_EQ_WITH_EXCEPTION(
63       zero,
64       LIBC_NAMESPACE::exp2f16(LIBC_NAMESPACE::fputil::cast<float16>(-25.0)),
65       FE_UNDERFLOW | FE_INEXACT);
66   EXPECT_MATH_ERRNO(ERANGE);
67 }
68