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/errno/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 18 using LlvmLibcExpfTest = LIBC_NAMESPACE::testing::FPTest<float>; 19 20 TEST_F(LlvmLibcExpfTest, SpecialNumbers) { 21 LIBC_NAMESPACE::libc_errno = 0; 22 23 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::expf(aNaN)); 24 EXPECT_MATH_ERRNO(0); 25 26 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::expf(inf)); 27 EXPECT_MATH_ERRNO(0); 28 29 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::expf(neg_inf)); 30 EXPECT_MATH_ERRNO(0); 31 32 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::expf(0.0f)); 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 39 TEST_F(LlvmLibcExpfTest, Overflow) { 40 LIBC_NAMESPACE::libc_errno = 0; 41 EXPECT_FP_EQ_WITH_EXCEPTION( 42 inf, LIBC_NAMESPACE::expf(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW); 43 EXPECT_MATH_ERRNO(ERANGE); 44 45 EXPECT_FP_EQ_WITH_EXCEPTION( 46 inf, LIBC_NAMESPACE::expf(FPBits(0x42cffff8U).get_val()), FE_OVERFLOW); 47 EXPECT_MATH_ERRNO(ERANGE); 48 49 EXPECT_FP_EQ_WITH_EXCEPTION( 50 inf, LIBC_NAMESPACE::expf(FPBits(0x42d00008U).get_val()), FE_OVERFLOW); 51 EXPECT_MATH_ERRNO(ERANGE); 52 } 53 54 #ifdef LIBC_TEST_FTZ_DAZ 55 56 using namespace LIBC_NAMESPACE::testing; 57 58 TEST_F(LlvmLibcExpfTest, FTZMode) { 59 ModifyMXCSR mxcsr(FTZ); 60 61 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal)); 62 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal)); 63 } 64 65 TEST_F(LlvmLibcExpfTest, DAZMode) { 66 ModifyMXCSR mxcsr(DAZ); 67 68 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal)); 69 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal)); 70 } 71 72 TEST_F(LlvmLibcExpfTest, FTZDAZMode) { 73 ModifyMXCSR mxcsr(FTZ | DAZ); 74 75 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(min_denormal)); 76 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::expf(max_denormal)); 77 } 78 79 #endif 80