libc/test/src/math/exhaustive/sincosf_test.cpp

   1 //===-- Exhaustive test for sincosf ---------------------------------------===//
   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 "exhaustive_test.h"
  10 #include "src/__support/FPUtil/FPBits.h"
  11 #include "src/math/sincosf.h"
  12 #include "test/UnitTest/FPMatcher.h"
  13 #include "utils/MPFRWrapper/MPFRUtils.h"
  14
  15 #include <thread>
  16
  17 using FPBits = __llvm_libc::fputil::FPBits<float>;
  18
  19 namespace mpfr = __llvm_libc::testing::mpfr;
  20
  21 struct LlvmLibcSinCosfExhaustiveTest : public LlvmLibcExhaustiveTest<uint32_t> {
  22   bool check(uint32_t start, uint32_t stop,
  23              mpfr::RoundingMode rounding) override {
  24     mpfr::ForceRoundingMode r(rounding);
  25     uint32_t bits = start;
  26     bool result = true;
  27     do {
  28       FPBits xbits(bits);
  29       float x = float(xbits);
  30       float sinx, cosx;
  31       __llvm_libc::sincosf(x, &sinx, &cosx);
  32       result &= EXPECT_MPFR_MATCH(mpfr::Operation::Sin, x, sinx, 0.5, rounding);
  33       result &= EXPECT_MPFR_MATCH(mpfr::Operation::Cos, x, cosx, 0.5, rounding);
  34     } while (++bits < stop);
  35     return result;
  36   }
  37 };
  38
  39 // Range: [0, +Inf);
  40 static constexpr uint32_t POS_START = 0x0000'0000U;
  41 static constexpr uint32_t POS_STOP = 0x7f80'0000U;
  42
  43 TEST_F(LlvmLibcSinCosfExhaustiveTest, PostiveRangeRoundNearestTieToEven) {
  44   test_full_range(POS_START, POS_STOP, mpfr::RoundingMode::Nearest);
  45 }
  46
  47 TEST_F(LlvmLibcSinCosfExhaustiveTest, PostiveRangeRoundUp) {
  48   test_full_range(POS_START, POS_STOP, mpfr::RoundingMode::Upward);
  49 }
  50
  51 TEST_F(LlvmLibcSinCosfExhaustiveTest, PostiveRangeRoundDown) {
  52   test_full_range(POS_START, POS_STOP, mpfr::RoundingMode::Downward);
  53 }
  54
  55 TEST_F(LlvmLibcSinCosfExhaustiveTest, PostiveRangeRoundTowardZero) {
  56   test_full_range(POS_START, POS_STOP, mpfr::RoundingMode::TowardZero);
  57 }
  58
  59 // Range: (-Inf, 0];
  60 static constexpr uint32_t NEG_START = 0x8000'0000U;
  61 static constexpr uint32_t NEG_STOP = 0xff80'0000U;
  62
  63 TEST_F(LlvmLibcSinCosfExhaustiveTest, NegativeRangeRoundNearestTieToEven) {
  64   test_full_range(NEG_START, NEG_STOP, mpfr::RoundingMode::Nearest);
  65 }
  66
  67 TEST_F(LlvmLibcSinCosfExhaustiveTest, NegativeRangeRoundUp) {
  68   test_full_range(NEG_START, NEG_STOP, mpfr::RoundingMode::Upward);
  69 }
  70
  71 TEST_F(LlvmLibcSinCosfExhaustiveTest, NegativeRangeRoundDown) {
  72   test_full_range(NEG_START, NEG_STOP, mpfr::RoundingMode::Downward);
  73 }
  74
  75 TEST_F(LlvmLibcSinCosfExhaustiveTest, NegativeRangeRoundTowardZero) {
  76   test_full_range(NEG_START, NEG_STOP, mpfr::RoundingMode::TowardZero);
  77 }