libc/test/src/math/exhaustive/log10f_test.cpp

   1 //===-- Exhaustive test for log10f ----------------------------------------===//
   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/log10f.h"
  12 #include "test/UnitTest/FPMatcher.h"
  13 #include "utils/MPFRWrapper/MPFRUtils.h"
  14
  15 using FPBits = __llvm_libc::fputil::FPBits<float>;
  16
  17 namespace mpfr = __llvm_libc::testing::mpfr;
  18
  19 struct LlvmLibcLog10fExhaustiveTest : public LlvmLibcExhaustiveTest<uint32_t> {
  20   bool check(uint32_t start, uint32_t stop,
  21              mpfr::RoundingMode rounding) override {
  22     mpfr::ForceRoundingMode r(rounding);
  23     uint32_t bits = start;
  24     bool result = true;
  25     do {
  26       FPBits xbits(bits);
  27       float x = float(xbits);
  28       result &= EXPECT_MPFR_MATCH(mpfr::Operation::Log10, x,
  29                                   __llvm_libc::log10f(x), 0.5, rounding);
  30     } while (bits++ < stop);
  31     return result;
  32   }
  33 };
  34
  35 // Range: All non-negative;
  36 static constexpr uint32_t START = 0x0000'0000U;
  37 static constexpr uint32_t STOP = 0x7f80'0000U;
  38 // Range: [1, 10];
  39 // static constexpr uint32_t START = 0x3f80'0000U;
  40 // static constexpr uint32_t STOP  = 0x41c0'0000U;
  41 TEST_F(LlvmLibcLog10fExhaustiveTest, RoundNearestTieToEven) {
  42   test_full_range(START, STOP, mpfr::RoundingMode::Nearest);
  43 }
  44
  45 TEST_F(LlvmLibcLog10fExhaustiveTest, RoundUp) {
  46   test_full_range(START, STOP, mpfr::RoundingMode::Upward);
  47 }
  48
  49 TEST_F(LlvmLibcLog10fExhaustiveTest, RoundDown) {
  50   test_full_range(START, STOP, mpfr::RoundingMode::Downward);
  51 }
  52
  53 TEST_F(LlvmLibcLog10fExhaustiveTest, RoundTowardZero) {
  54   test_full_range(START, STOP, mpfr::RoundingMode::TowardZero);
  55 }