text: //===-- Unittests for roundf ----------------------------------------------===//
  //
  // 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/roundf.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<float>;
  
  namespace mpfr = __llvm_libc::testing::mpfr;
  
  DECLARE_SPECIAL_CONSTANTS(float)
  
  TEST(RoundfTest, SpecialNumbers) {
    EXPECT_FP_EQ(zero, __llvm_libc::roundf(zero));
    EXPECT_FP_EQ(negZero, __llvm_libc::roundf(negZero));
  
    EXPECT_FP_EQ(inf, __llvm_libc::roundf(inf));
    EXPECT_FP_EQ(negInf, __llvm_libc::roundf(negInf));
  
    ASSERT_NE(isnan(nan), 0);
    ASSERT_NE(isnan(__llvm_libc::roundf(nan)), 0);
  }
  
  TEST(RoundfTest, RoundedNumbers) {
    EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(1.0f));
    EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-1.0f));
    EXPECT_FP_EQ(10.0f, __llvm_libc::roundf(10.0f));
    EXPECT_FP_EQ(-10.0f, __llvm_libc::roundf(-10.0f));
    EXPECT_FP_EQ(1234.0f, __llvm_libc::roundf(1234.0f));
    EXPECT_FP_EQ(-1234.0f, __llvm_libc::roundf(-1234.0f));
  }
  
  TEST(RoundfTest, Fractions) {
    EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(0.5f));
    EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-0.5f));
    EXPECT_FP_EQ(0.0f, __llvm_libc::roundf(0.115f));
    EXPECT_FP_EQ(-0.0f, __llvm_libc::roundf(-0.115f));
    EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(0.715f));
    EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-0.715f));
    EXPECT_FP_EQ(1.0f, __llvm_libc::roundf(1.3f));
    EXPECT_FP_EQ(-1.0f, __llvm_libc::roundf(-1.3f));
    EXPECT_FP_EQ(2.0f, __llvm_libc::roundf(1.5f));
    EXPECT_FP_EQ(-2.0f, __llvm_libc::roundf(-1.5f));
    EXPECT_FP_EQ(2.0f, __llvm_libc::roundf(1.75f));
    EXPECT_FP_EQ(-2.0f, __llvm_libc::roundf(-1.75f));
    EXPECT_FP_EQ(10.0f, __llvm_libc::roundf(10.32f));
    EXPECT_FP_EQ(-10.0f, __llvm_libc::roundf(-10.32f));
    EXPECT_FP_EQ(11.0f, __llvm_libc::roundf(10.65f));
    EXPECT_FP_EQ(-11.0f, __llvm_libc::roundf(-10.65f));
    EXPECT_FP_EQ(1234.0f, __llvm_libc::roundf(1234.38f));
    EXPECT_FP_EQ(-1234.0f, __llvm_libc::roundf(-1234.38f));
    EXPECT_FP_EQ(1235.0f, __llvm_libc::roundf(1234.96f));
    EXPECT_FP_EQ(-1235.0f, __llvm_libc::roundf(-1234.96f));
  }
  
  TEST(RoundfTest, InFloatRange) {
    using UIntType = FPBits::UIntType;
    constexpr UIntType count = 1000000;
    constexpr UIntType step = UIntType(-1) / count;
    for (UIntType i = 0, v = 0; i <= count; ++i, v += step) {
      float x = FPBits(v);
      if (isnan(x) || isinf(x))
        continue;
  
      ASSERT_MPFR_MATCH(mpfr::Operation::Round, x, __llvm_libc::roundf(x), 0.0);
    }
  }
  