libc/test/src/math/asinf_test.cpp

   1 //===-- Unittests for asinf
   2 //------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "hdr/math_macros.h"
  11 #include "src/__support/FPUtil/FPBits.h"
  12 #include "src/errno/libc_errno.h"
  13 #include "src/math/asinf.h"
  14 #include "test/UnitTest/FPMatcher.h"
  15 #include "test/UnitTest/Test.h"
  16 #include "utils/MPFRWrapper/MPFRUtils.h"
  17
  18 #include <stdint.h>
  19
  20 using LlvmLibcAsinfTest = LIBC_NAMESPACE::testing::FPTest<float>;
  21
  22 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
  23
  24 TEST_F(LlvmLibcAsinfTest, SpecialNumbers) {
  25   LIBC_NAMESPACE::libc_errno = 0;
  26
  27   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::asinf(aNaN));
  28   EXPECT_MATH_ERRNO(0);
  29
  30   EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::asinf(0.0f));
  31   EXPECT_MATH_ERRNO(0);
  32
  33   EXPECT_FP_EQ_ALL_ROUNDING(-0.0f, LIBC_NAMESPACE::asinf(-0.0f));
  34   EXPECT_MATH_ERRNO(0);
  35
  36   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::asinf(inf));
  37   EXPECT_MATH_ERRNO(EDOM);
  38
  39   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::asinf(neg_inf));
  40   EXPECT_MATH_ERRNO(EDOM);
  41 }
  42
  43 TEST_F(LlvmLibcAsinfTest, InFloatRange) {
  44   constexpr uint32_t COUNT = 100'000;
  45   constexpr uint32_t STEP = UINT32_MAX / COUNT;
  46   for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
  47     float x = FPBits(v).get_val();
  48     if (FPBits(v).is_nan() || FPBits(v).is_inf())
  49       continue;
  50     ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
  51                                    LIBC_NAMESPACE::asinf(x), 0.5);
  52   }
  53 }
  54
  55 TEST_F(LlvmLibcAsinfTest, SpecificBitPatterns) {
  56   constexpr int N = 11;
  57   constexpr uint32_t INPUTS[N] = {
  58       0x3f000000, // x = 0.5f
  59       0x3f3504f3, // x = sqrt(2)/2, FE_DOWNWARD
  60       0x3f3504f4, // x = sqrt(2)/2, FE_UPWARD
  61       0x3f5db3d7, // x = sqrt(3)/2, FE_DOWNWARD
  62       0x3f5db3d8, // x = sqrt(3)/2, FE_UPWARD
  63       0x3f800000, // x = 1.0f
  64       0x40000000, // x = 2.0f
  65       0x3d09bf86, // x = 0x1.137f0cp-5f
  66       0x3de5fa1e, // x = 0x1.cbf43cp-4f
  67       0x3f083a1a, // x = 0x1.107434p-1f
  68       0x3f7741b6, // x = 0x1.ee836cp-1f
  69   };
  70
  71   for (int i = 0; i < N; ++i) {
  72     float x = FPBits(INPUTS[i]).get_val();
  73     EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
  74                                    LIBC_NAMESPACE::asinf(x), 0.5);
  75     EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, -x,
  76                                    LIBC_NAMESPACE::asinf(-x), 0.5);
  77   }
  78 }