//===-- Unittests for shared math functions -------------------------------===//
//
// 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 "shared/math.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"

#ifdef LIBC_TYPES_HAS_FLOAT16

TEST(LlvmLibcSharedMathTest, AllFloat16) {
  int exponent;

  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::acoshf16(1.0f16));
  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::acospif16(1.0f16));
  EXPECT_FP_EQ(0x1p+0f16, LIBC_NAMESPACE::shared::rsqrtf16(1.0f16));

  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::asinf16(0.0f16));
  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::asinhf16(0.0f16));
  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::atanf16(0.0f16));
  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::atanhf16(0.0f16));
  EXPECT_FP_EQ(0x1p+0f16, LIBC_NAMESPACE::shared::cosf16(0.0f16));
  EXPECT_FP_EQ(0x1p+0f16, LIBC_NAMESPACE::shared::coshf16(0.0f16));
  EXPECT_FP_EQ(0x1p+0f16, LIBC_NAMESPACE::shared::cospif16(0.0f16));
  EXPECT_FP_EQ(0x1p+0f16, LIBC_NAMESPACE::shared::exp10f16(0.0f16));
  EXPECT_FP_EQ(0x0p+0f16, LIBC_NAMESPACE::shared::exp10m1f16(0.0f16));

  EXPECT_FP_EQ(0x1p+0f16, LIBC_NAMESPACE::shared::expf16(0.0f16));

  ASSERT_FP_EQ(float16(8 << 5), LIBC_NAMESPACE::shared::ldexpf16(8.0f16, 5));
  ASSERT_FP_EQ(float16(-1 * (8 << 5)),
               LIBC_NAMESPACE::shared::ldexpf16(-8.0f16, 5));

  EXPECT_FP_EQ_ALL_ROUNDING(
      0.75f16, LIBC_NAMESPACE::shared::frexpf16(24.0f16, &exponent));
  EXPECT_EQ(exponent, 5);

  EXPECT_FP_EQ(0x1.921fb6p+0f16, LIBC_NAMESPACE::shared::acosf16(0.0f16));
}

#endif // LIBC_TYPES_HAS_FLOAT16

TEST(LlvmLibcSharedMathTest, AllFloat) {
  int exponent;

  EXPECT_FP_EQ(0x1.921fb6p+0, LIBC_NAMESPACE::shared::acosf(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::acoshf(1.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::asinf(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::asinhf(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::atan2f(0.0f, 0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::atanf(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::atanhf(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::cbrtf(0.0f));
  EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::cosf(0.0f));
  EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::coshf(0.0f));
  EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::cospif(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::exp10m1f(0.0f));
  EXPECT_FP_EQ(0x0p+0f, LIBC_NAMESPACE::shared::erff(0.0f));
  EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::exp10f(0.0f));
  EXPECT_FP_EQ(0x1p+0f, LIBC_NAMESPACE::shared::expf(0.0f));

  EXPECT_FP_EQ_ALL_ROUNDING(0.75f,
                            LIBC_NAMESPACE::shared::frexpf(24.0f, &exponent));
  EXPECT_EQ(exponent, 5);

  ASSERT_FP_EQ(float(8 << 5), LIBC_NAMESPACE::shared::ldexpf(8.0f, 5));
  ASSERT_FP_EQ(float(-1 * (8 << 5)), LIBC_NAMESPACE::shared::ldexpf(-8.0f, 5));
}

TEST(LlvmLibcSharedMathTest, AllDouble) {
  EXPECT_FP_EQ(0x1.921fb54442d18p+0, LIBC_NAMESPACE::shared::acos(0.0));
  EXPECT_FP_EQ(0x0p+0, LIBC_NAMESPACE::shared::asin(0.0));
  EXPECT_FP_EQ(0x0p+0, LIBC_NAMESPACE::shared::atan(0.0));
  EXPECT_FP_EQ(0x0p+0, LIBC_NAMESPACE::shared::atan2(0.0, 0.0));
  EXPECT_FP_EQ(0x0p+0, LIBC_NAMESPACE::shared::cbrt(0.0));
  EXPECT_FP_EQ(0x1p+0, LIBC_NAMESPACE::shared::cos(0.0));
  EXPECT_FP_EQ(0x0p+0, LIBC_NAMESPACE::shared::dsqrtl(0.0));
  EXPECT_FP_EQ(0x1p+0, LIBC_NAMESPACE::shared::exp(0.0));
  EXPECT_FP_EQ(0x1p+0, LIBC_NAMESPACE::shared::exp10(0.0));
}

#ifdef LIBC_TYPES_HAS_FLOAT128

TEST(LlvmLibcSharedMathTest, AllFloat128) {
  int exponent;

  EXPECT_FP_EQ(float128(0x0p+0),
               LIBC_NAMESPACE::shared::atan2f128(float128(0.0), float128(0.0)));
  EXPECT_FP_EQ_ALL_ROUNDING(float128(0.75), LIBC_NAMESPACE::shared::frexpf128(
                                                float128(24), &exponent));
  EXPECT_EQ(exponent, 5);

  ASSERT_FP_EQ(float128(8 << 5),
               LIBC_NAMESPACE::shared::ldexpf128(float128(8), 5));
  ASSERT_FP_EQ(float128(-1 * (8 << 5)),
               LIBC_NAMESPACE::shared::ldexpf128(float128(-8), 5));
}

#endif // LIBC_TYPES_HAS_FLOAT128