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/math/asinf.h"
  12 #include "test/UnitTest/FPMatcher.h"
  13 #include "test/UnitTest/Test.h"
  14 #include "utils/MPFRWrapper/MPFRUtils.h"
  15 #include <math.h>
  16
  17 #include <errno.h>
  18 #include <stdint.h>
  19
  20 using FPBits = __llvm_libc::fputil::FPBits<float>;
  21
  22 namespace mpfr = __llvm_libc::testing::mpfr;
  23
  24 DECLARE_SPECIAL_CONSTANTS(float)
  25
  26 TEST(LlvmLibcAsinfTest, SpecialNumbers) {
  27   errno = 0;
  28
  29   EXPECT_FP_EQ(aNaN, __llvm_libc::asinf(aNaN));
  30   EXPECT_MATH_ERRNO(0);
  31
  32   EXPECT_FP_EQ(0.0f, __llvm_libc::asinf(0.0f));
  33   EXPECT_MATH_ERRNO(0);
  34
  35   EXPECT_FP_EQ(-0.0f, __llvm_libc::asinf(-0.0f));
  36   EXPECT_MATH_ERRNO(0);
  37
  38   EXPECT_FP_EQ(aNaN, __llvm_libc::asinf(inf));
  39   EXPECT_MATH_ERRNO(EDOM);
  40
  41   EXPECT_FP_EQ(aNaN, __llvm_libc::asinf(neg_inf));
  42   EXPECT_MATH_ERRNO(EDOM);
  43 }
  44
  45 TEST(LlvmLibcAsinfTest, InFloatRange) {
  46   constexpr uint32_t COUNT = 1000000;
  47   constexpr uint32_t STEP = UINT32_MAX / COUNT;
  48   for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
  49     float x = float(FPBits(v));
  50     if (isnan(x) || isinf(x))
  51       continue;
  52     ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
  53                                    __llvm_libc::asinf(x), 0.5);
  54   }
  55 }
  56
  57 TEST(LlvmLibcAsinfTest, SpecificBitPatterns) {
  58   constexpr int N = 11;
  59   constexpr uint32_t INPUTS[N] = {
  60       0x3f000000, // x = 0.5f
  61       0x3f3504f3, // x = sqrt(2)/2, FE_DOWNWARD
  62       0x3f3504f4, // x = sqrt(2)/2, FE_UPWARD
  63       0x3f5db3d7, // x = sqrt(3)/2, FE_DOWNWARD
  64       0x3f5db3d8, // x = sqrt(3)/2, FE_UPWARD
  65       0x3f800000, // x = 1.0f
  66       0x40000000, // x = 2.0f
  67       0x3d09bf86, // x = 0x1.137f0cp-5f
  68       0x3de5fa1e, // x = 0x1.cbf43cp-4f
  69       0x3f083a1a, // x = 0x1.107434p-1f
  70       0x3f7741b6, // x = 0x1.ee836cp-1f
  71   };
  72
  73   for (int i = 0; i < N; ++i) {
  74     float x = float(FPBits(INPUTS[i]));
  75     EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, x,
  76                                    __llvm_libc::asinf(x), 0.5);
  77     EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Asin, -x,
  78                                    __llvm_libc::asinf(-x), 0.5);
  79   }
  80 }