1 //===-- Unittests for roundf ----------------------------------------------===// 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 "src/math/roundf.h" 10 #include "utils/FPUtil/FPBits.h" 11 #include "utils/FPUtil/TestHelpers.h" 12 #include "utils/MPFRWrapper/MPFRUtils.h" 13 #include "utils/UnitTest/Test.h" 14 #include <math.h> 15 16 using FPBits = __llvm_libc::fputil::FPBits<float>; 17 18 namespace mpfr = __llvm_libc::testing::mpfr; 19 20 DECLARE_SPECIAL_CONSTANTS(float) 21 22 TEST(LlvmLibcRoundfTest, SpecialNumbers) { 23 EXPECT_FP_EQ(zero, __llvm_libc::roundf(zero)); 24 EXPECT_FP_EQ(negZero, __llvm_libc::roundf(negZero)); 25 26 EXPECT_FP_EQ(inf, __llvm_libc::roundf(inf)); 27 EXPECT_FP_EQ(negInf, __llvm_libc::roundf(negInf)); 28 29 EXPECT_FP_EQ(aNaN, __llvm_libc::roundf(aNaN)); 30 } 31 32 TEST(LlvmLibcRoundfTest, RoundedNumbers) { 33 EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(1.0f)); 34 EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-1.0f)); 35 EXPECT_FP_EQ(10.0f, __llvm_libc::roundf(10.0f)); 36 EXPECT_FP_EQ(-10.0f, __llvm_libc::roundf(-10.0f)); 37 EXPECT_FP_EQ(1234.0f, __llvm_libc::roundf(1234.0f)); 38 EXPECT_FP_EQ(-1234.0f, __llvm_libc::roundf(-1234.0f)); 39 } 40 41 TEST(LlvmLibcRoundfTest, Fractions) { 42 EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(0.5f)); 43 EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-0.5f)); 44 EXPECT_FP_EQ(0.0f, __llvm_libc::roundf(0.115f)); 45 EXPECT_FP_EQ(-0.0f, __llvm_libc::roundf(-0.115f)); 46 EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(0.715f)); 47 EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-0.715f)); 48 EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(1.3f)); 49 EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-1.3f)); 50 EXPECT_FP_EQ(2.0f, __llvm_libc::roundf(1.5f)); 51 EXPECT_FP_EQ(-2.0f, __llvm_libc::roundf(-1.5f)); 52 EXPECT_FP_EQ(2.0f, __llvm_libc::roundf(1.75f)); 53 EXPECT_FP_EQ(-2.0f, __llvm_libc::roundf(-1.75f)); 54 EXPECT_FP_EQ(10.0f, __llvm_libc::roundf(10.32f)); 55 EXPECT_FP_EQ(-10.0f, __llvm_libc::roundf(-10.32f)); 56 EXPECT_FP_EQ(11.0f, __llvm_libc::roundf(10.65f)); 57 EXPECT_FP_EQ(-11.0f, __llvm_libc::roundf(-10.65f)); 58 EXPECT_FP_EQ(1234.0f, __llvm_libc::roundf(1234.38f)); 59 EXPECT_FP_EQ(-1234.0f, __llvm_libc::roundf(-1234.38f)); 60 EXPECT_FP_EQ(1235.0f, __llvm_libc::roundf(1234.96f)); 61 EXPECT_FP_EQ(-1235.0f, __llvm_libc::roundf(-1234.96f)); 62 } 63 64 TEST(LlvmLibcRoundfTest, InFloatRange) { 65 using UIntType = FPBits::UIntType; 66 constexpr UIntType count = 1000000; 67 constexpr UIntType step = UIntType(-1) / count; 68 for (UIntType i = 0, v = 0; i <= count; ++i, v += step) { 69 float x = FPBits(v); 70 if (isnan(x) || isinf(x)) 71 continue; 72 73 ASSERT_MPFR_MATCH(mpfr::Operation::Round, x, __llvm_libc::roundf(x), 0.0); 74 } 75 } 76