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 "src/__support/CPP/array.h"
  10 #include "src/__support/FPUtil/FPBits.h"
  11 #include "src/errno/libc_errno.h"
  12 #include "src/math/sinhf.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 LlvmLibcSinhfTest = LIBC_NAMESPACE::testing::FPTest<float>;
  22
  23 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
  24
  25 TEST_F(LlvmLibcSinhfTest, SpecialNumbers) {
  26   libc_errno = 0;
  27
  28   EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinhf(aNaN));
  29   EXPECT_MATH_ERRNO(0);
  30
  31   EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::sinhf(0.0f));
  32   EXPECT_MATH_ERRNO(0);
  33
  34   EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::sinhf(-0.0f));
  35   EXPECT_MATH_ERRNO(0);
  36
  37   EXPECT_FP_EQ(inf, LIBC_NAMESPACE::sinhf(inf));
  38   EXPECT_MATH_ERRNO(0);
  39
  40   EXPECT_FP_EQ(neg_inf, LIBC_NAMESPACE::sinhf(neg_inf));
  41   EXPECT_MATH_ERRNO(0);
  42 }
  43
  44 TEST_F(LlvmLibcSinhfTest, 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(mpfr::Operation::Sinh, x, LIBC_NAMESPACE::sinhf(x), 0.5);
  52   }
  53 }
  54
  55 // For small values, sinh(x) is x.
  56 TEST_F(LlvmLibcSinhfTest, SmallValues) {
  57   float x = float(FPBits(uint32_t(0x17800000)));
  58   float result = LIBC_NAMESPACE::sinhf(x);
  59   EXPECT_MPFR_MATCH(mpfr::Operation::Sinh, x, result, 0.5);
  60   EXPECT_FP_EQ(x, result);
  61
  62   x = float(FPBits(uint32_t(0x00400000)));
  63   result = LIBC_NAMESPACE::sinhf(x);
  64   EXPECT_MPFR_MATCH(mpfr::Operation::Sinh, x, result, 0.5);
  65   EXPECT_FP_EQ(x, result);
  66 }
  67
  68 TEST_F(LlvmLibcSinhfTest, Overflow) {
  69   libc_errno = 0;
  70   EXPECT_FP_EQ_WITH_EXCEPTION(
  71       inf, LIBC_NAMESPACE::sinhf(float(FPBits(0x7f7fffffU))), FE_OVERFLOW);
  72   EXPECT_MATH_ERRNO(ERANGE);
  73
  74   EXPECT_FP_EQ_WITH_EXCEPTION(
  75       inf, LIBC_NAMESPACE::sinhf(float(FPBits(0x42cffff8U))), FE_OVERFLOW);
  76   EXPECT_MATH_ERRNO(ERANGE);
  77
  78   EXPECT_FP_EQ_WITH_EXCEPTION(
  79       inf, LIBC_NAMESPACE::sinhf(float(FPBits(0x42d00008U))), FE_OVERFLOW);
  80   EXPECT_MATH_ERRNO(ERANGE);
  81 }
  82
  83 TEST_F(LlvmLibcSinhfTest, ExceptionalValues) {
  84   float x = float(FPBits(uint32_t(0x3a12'85ffU)));
  85   EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sinh, x,
  86                                  LIBC_NAMESPACE::sinhf(x), 0.5);
  87
  88   x = -float(FPBits(uint32_t(0x3a12'85ffU)));
  89   EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sinh, x,
  90                                  LIBC_NAMESPACE::sinhf(x), 0.5);
  91 }