libc/test/src/math/sinhf_test.cpp

   1 //===-- Unittests for sinhf -----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "hdr/math_macros.h"
  10 #include "src/__support/CPP/array.h"
  11 #include "src/__support/FPUtil/FPBits.h"
  12 #include "src/errno/libc_errno.h"
  13 #include "src/math/sinhf.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 LlvmLibcSinhfTest = LIBC_NAMESPACE::testing::FPTest<float>;
  21
  22 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
  23
  24 TEST_F(LlvmLibcSinhfTest, SpecialNumbers) {
  25   LIBC_NAMESPACE::libc_errno = 0;
  26
  27   EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinhf(aNaN));
  28   EXPECT_MATH_ERRNO(0);
  29
  30   EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::sinhf(0.0f));
  31   EXPECT_MATH_ERRNO(0);
  32
  33   EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::sinhf(-0.0f));
  34   EXPECT_MATH_ERRNO(0);
  35
  36   EXPECT_FP_EQ(inf, LIBC_NAMESPACE::sinhf(inf));
  37   EXPECT_MATH_ERRNO(0);
  38
  39   EXPECT_FP_EQ(neg_inf, LIBC_NAMESPACE::sinhf(neg_inf));
  40   EXPECT_MATH_ERRNO(0);
  41 }
  42
  43 TEST_F(LlvmLibcSinhfTest, 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(mpfr::Operation::Sinh, x, LIBC_NAMESPACE::sinhf(x), 0.5);
  51   }
  52 }
  53
  54 // For small values, sinh(x) is x.
  55 TEST_F(LlvmLibcSinhfTest, SmallValues) {
  56   float x = FPBits(uint32_t(0x17800000)).get_val();
  57   float result = LIBC_NAMESPACE::sinhf(x);
  58   EXPECT_MPFR_MATCH(mpfr::Operation::Sinh, x, result, 0.5);
  59   EXPECT_FP_EQ(x, result);
  60
  61   x = FPBits(uint32_t(0x00400000)).get_val();
  62   result = LIBC_NAMESPACE::sinhf(x);
  63   EXPECT_MPFR_MATCH(mpfr::Operation::Sinh, x, result, 0.5);
  64   EXPECT_FP_EQ(x, result);
  65 }
  66
  67 TEST_F(LlvmLibcSinhfTest, Overflow) {
  68   LIBC_NAMESPACE::libc_errno = 0;
  69   EXPECT_FP_EQ_WITH_EXCEPTION(
  70       inf, LIBC_NAMESPACE::sinhf(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW);
  71   EXPECT_MATH_ERRNO(ERANGE);
  72
  73   EXPECT_FP_EQ_WITH_EXCEPTION(
  74       inf, LIBC_NAMESPACE::sinhf(FPBits(0x42cffff8U).get_val()), FE_OVERFLOW);
  75   EXPECT_MATH_ERRNO(ERANGE);
  76
  77   EXPECT_FP_EQ_WITH_EXCEPTION(
  78       inf, LIBC_NAMESPACE::sinhf(FPBits(0x42d00008U).get_val()), FE_OVERFLOW);
  79   EXPECT_MATH_ERRNO(ERANGE);
  80 }
  81
  82 TEST_F(LlvmLibcSinhfTest, ExceptionalValues) {
  83   float x = FPBits(uint32_t(0x3a12'85ffU)).get_val();
  84   EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sinh, x,
  85                                  LIBC_NAMESPACE::sinhf(x), 0.5);
  86
  87   x = -FPBits(uint32_t(0x3a12'85ffU)).get_val();
  88   EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sinh, x,
  89                                  LIBC_NAMESPACE::sinhf(x), 0.5);
  90 }