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//===-- Unittests for trunc -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "include/math.h"
#include "src/math/trunc.h"
#include "utils/FPUtil/FPBits.h"
#include "utils/FPUtil/TestHelpers.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
#include "utils/UnitTest/Test.h"
using FPBits = __llvm_libc::fputil::FPBits<double>;
namespace mpfr = __llvm_libc::testing::mpfr;
static const double zero = FPBits::zero();
static const double negZero = FPBits::negZero();
static const double nan = FPBits::buildNaN(1);
static const double inf = FPBits::inf();
static const double negInf = FPBits::negInf();
TEST(TruncTest, SpecialNumbers) {
EXPECT_FP_EQ(zero, __llvm_libc::trunc(zero));
EXPECT_FP_EQ(negZero, __llvm_libc::trunc(negZero));
EXPECT_FP_EQ(inf, __llvm_libc::trunc(inf));
EXPECT_FP_EQ(negInf, __llvm_libc::trunc(negInf));
ASSERT_NE(isnan(nan), 0);
ASSERT_NE(isnan(__llvm_libc::trunc(nan)), 0);
}
TEST(TruncTest, RoundedNumbers) {
EXPECT_FP_EQ(1.0, __llvm_libc::trunc(1.0));
EXPECT_FP_EQ(-1.0, __llvm_libc::trunc(-1.0));
EXPECT_FP_EQ(10.0, __llvm_libc::trunc(10.0));
EXPECT_FP_EQ(-10.0, __llvm_libc::trunc(-10.0));
EXPECT_FP_EQ(1234.0, __llvm_libc::trunc(1234.0));
EXPECT_FP_EQ(-1234.0, __llvm_libc::trunc(-1234.0));
}
TEST(TruncTest, Fractions) {
EXPECT_FP_EQ(0.0, __llvm_libc::trunc(0.5));
EXPECT_FP_EQ(-0.0, __llvm_libc::trunc(-0.5));
EXPECT_FP_EQ(0.0, __llvm_libc::trunc(0.115));
EXPECT_FP_EQ(-0.0, __llvm_libc::trunc(-0.115));
EXPECT_FP_EQ(0.0, __llvm_libc::trunc(0.715));
EXPECT_FP_EQ(-0.0, __llvm_libc::trunc(-0.715));
EXPECT_FP_EQ(1.0, __llvm_libc::trunc(1.3));
EXPECT_FP_EQ(-1.0, __llvm_libc::trunc(-1.3));
EXPECT_FP_EQ(1.0, __llvm_libc::trunc(1.5));
EXPECT_FP_EQ(-1.0, __llvm_libc::trunc(-1.5));
EXPECT_FP_EQ(1.0, __llvm_libc::trunc(1.75));
EXPECT_FP_EQ(-1.0, __llvm_libc::trunc(-1.75));
EXPECT_FP_EQ(10.0, __llvm_libc::trunc(10.32));
EXPECT_FP_EQ(-10.0, __llvm_libc::trunc(-10.32));
EXPECT_FP_EQ(10.0, __llvm_libc::trunc(10.65));
EXPECT_FP_EQ(-10.0, __llvm_libc::trunc(-10.65));
EXPECT_FP_EQ(1234.0, __llvm_libc::trunc(1234.38));
EXPECT_FP_EQ(-1234.0, __llvm_libc::trunc(-1234.38));
EXPECT_FP_EQ(1234.0, __llvm_libc::trunc(1234.96));
EXPECT_FP_EQ(-1234.0, __llvm_libc::trunc(-1234.96));
}
TEST(TruncTest, InDoubleRange) {
using UIntType = FPBits::UIntType;
constexpr UIntType count = 10000000;
constexpr UIntType step = UIntType(-1) / count;
for (UIntType i = 0, v = 0; i <= count; ++i, v += step) {
double x = FPBits(v);
if (isnan(x) || isinf(x))
continue;
ASSERT_MPFR_MATCH(mpfr::Operation::Trunc, x, __llvm_libc::trunc(x), 0.0);
}
}
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