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 "src/__support/FPUtil/FPBits.h"
  11 #include "src/errno/libc_errno.h"
  12 #include "src/math/asinf.h"
  13 #include "test/UnitTest/FPMatcher.h"
  14 #include "test/UnitTest/Test.h"
  15 #include "utils/MPFRWrapper/MPFRUtils.h"
  16 #include <math.h>
  17
  18 #include <errno.h>
  19 #include <stdint.h>
  20
  21 using LlvmLibcAsinfTest = LIBC_NAMESPACE::testing::FPTest<float>;
  22
  23 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
  24
  25 TEST_F(LlvmLibcAsinfTest, SpecialNumbers) {
  26   libc_errno = 0;
  27
  28   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::asinf(aNaN));
  29   EXPECT_MATH_ERRNO(0);
  30
  31   EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::asinf(0.0f));
  32   EXPECT_MATH_ERRNO(0);
  33
  34   EXPECT_FP_EQ_ALL_ROUNDING(-0.0f, LIBC_NAMESPACE::asinf(-0.0f));
  35   EXPECT_MATH_ERRNO(0);
  36
  37   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::asinf(inf));
  38   EXPECT_MATH_ERRNO(EDOM);
  39
  40   EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::asinf(neg_inf));
  41   EXPECT_MATH_ERRNO(EDOM);
  42 }
  43
  44 TEST_F(LlvmLibcAsinfTest, InFloatRange) {
  45   constexpr uint32_t COUNT = 100'000;
  46   constexpr uint32_t STEP = UINT32_MAX / COUNT;
  47   for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
  48     float x = float(FPBits(v));
  49     if (isnan(x) || isinf(x))
  50       continue;
  51     ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
  52                                    LIBC_NAMESPACE::asinf(x), 0.5);
  53   }
  54 }
  55
  56 TEST_F(LlvmLibcAsinfTest, SpecificBitPatterns) {
  57   constexpr int N = 11;
  58   constexpr uint32_t INPUTS[N] = {
  59       0x3f000000, // x = 0.5f
  60       0x3f3504f3, // x = sqrt(2)/2, FE_DOWNWARD
  61       0x3f3504f4, // x = sqrt(2)/2, FE_UPWARD
  62       0x3f5db3d7, // x = sqrt(3)/2, FE_DOWNWARD
  63       0x3f5db3d8, // x = sqrt(3)/2, FE_UPWARD
  64       0x3f800000, // x = 1.0f
  65       0x40000000, // x = 2.0f
  66       0x3d09bf86, // x = 0x1.137f0cp-5f
  67       0x3de5fa1e, // x = 0x1.cbf43cp-4f
  68       0x3f083a1a, // x = 0x1.107434p-1f
  69       0x3f7741b6, // x = 0x1.ee836cp-1f
  70   };
  71
  72   for (int i = 0; i < N; ++i) {
  73     float x = float(FPBits(INPUTS[i]));
  74     EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
  75                                    LIBC_NAMESPACE::asinf(x), 0.5);
  76     EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, -x,
  77                                    LIBC_NAMESPACE::asinf(-x), 0.5);
  78   }
  79 }