text: //===-- Unittests for sinf ------------------------------------------------===//
  //
  // 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 "src/math/sinf.h"
  #include "test/src/math/sdcomp26094.h"
  #include "utils/CPP/Array.h"
  #include "utils/FPUtil/FPBits.h"
  #include "utils/FPUtil/TestHelpers.h"
  #include "utils/MPFRWrapper/MPFRUtils.h"
  #include "utils/UnitTest/Test.h"
  #include <math.h>
  
  #include <errno.h>
  #include <stdint.h>
  
  using __llvm_libc::testing::sdcomp26094Values;
  using FPBits = __llvm_libc::fputil::FPBits<float>;
  
  namespace mpfr = __llvm_libc::testing::mpfr;
  
  DECLARE_SPECIAL_CONSTANTS(float)
  
  TEST(LlvmLibcSinfTest, SpecialNumbers) {
    errno = 0;
  
    EXPECT_FP_EQ(aNaN, __llvm_libc::sinf(aNaN));
    EXPECT_EQ(errno, 0);
  
    EXPECT_FP_EQ(0.0f, __llvm_libc::sinf(0.0f));
    EXPECT_EQ(errno, 0);
  
    EXPECT_FP_EQ(-0.0f, __llvm_libc::sinf(-0.0f));
    EXPECT_EQ(errno, 0);
  
    errno = 0;
    EXPECT_FP_EQ(aNaN, __llvm_libc::sinf(inf));
    EXPECT_EQ(errno, EDOM);
  
    errno = 0;
    EXPECT_FP_EQ(aNaN, __llvm_libc::sinf(negInf));
    EXPECT_EQ(errno, EDOM);
  }
  
  TEST(LlvmLibcSinfTest, InFloatRange) {
    constexpr uint32_t count = 1000000;
    constexpr uint32_t step = UINT32_MAX / count;
    for (uint32_t i = 0, v = 0; i <= count; ++i, v += step) {
      float x = float(FPBits(v));
      if (isnan(x) || isinf(x))
        continue;
      ASSERT_MPFR_MATCH(mpfr::Operation::Sin, x, __llvm_libc::sinf(x), 1.0);
    }
  }
  
  TEST(LlvmLibcSinfTest, SpecificBitPatterns) {
    float x = float(FPBits(uint32_t(0xc70d39a1)));
    EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, __llvm_libc::sinf(x), 1.0);
  }
  
  // For small values, sin(x) is x.
  TEST(LlvmLibcSinfTest, SmallValues) {
    float x = float(FPBits(uint32_t(0x17800000)));
    float result = __llvm_libc::sinf(x);
    EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, result, 1.0);
    EXPECT_FP_EQ(x, result);
  
    x = float(FPBits(uint32_t(0x00400000)));
    result = __llvm_libc::sinf(x);
    EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, result, 1.0);
    EXPECT_FP_EQ(x, result);
  }
  
  // SDCOMP-26094: check sinf in the cases for which the range reducer
  // returns values furthest beyond its nominal upper bound of pi/4.
  TEST(LlvmLibcSinfTest, SDCOMP_26094) {
    for (uint32_t v : sdcomp26094Values) {
      float x = float(FPBits((v)));
      EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, __llvm_libc::sinf(x), 1.0);
    }
  }
  