1 //===-- Exhaustive test for log1pf ----------------------------------------===//
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/log1pf.h"
12 #include "utils/MPFRWrapper/MPFRUtils.h"
13 #include "utils/UnitTest/FPMatcher.h"
14 
15 using FPBits = __llvm_libc::fputil::FPBits<float>;
16 
17 namespace mpfr = __llvm_libc::testing::mpfr;
18 
19 struct LlvmLibclog1pfExhaustiveTest : public LlvmLibcExhaustiveTest<uint32_t> {
20   void check(uint32_t start, uint32_t stop,
21              mpfr::RoundingMode rounding) override {
22     mpfr::ForceRoundingMode r(rounding);
23     uint32_t bits = start;
24     do {
25       FPBits xbits(bits);
26       float x = float(xbits);
27       EXPECT_MPFR_MATCH(mpfr::Operation::Log1p, x, __llvm_libc::log1pf(x), 0.5,
28                         rounding);
29     } while (bits++ < stop);
30   }
31 };
32 
33 // Range: All non-negative;
34 static constexpr uint32_t START = 0x0000'0000U;
35 static constexpr uint32_t STOP = 0x7f80'0000U;
36 // Range: [-1, 0];
37 // static constexpr uint32_t START = 0x8000'0000U;
38 // static constexpr uint32_t STOP  = 0xbf80'0000U;
39 static constexpr int NUM_THREADS = 16;
40 
41 TEST_F(LlvmLibclog1pfExhaustiveTest, RoundNearestTieToEven) {
42   test_full_range(START, STOP, NUM_THREADS, mpfr::RoundingMode::Nearest);
43 }
44 
45 TEST_F(LlvmLibclog1pfExhaustiveTest, RoundUp) {
46   test_full_range(START, STOP, NUM_THREADS, mpfr::RoundingMode::Upward);
47 }
48 
49 TEST_F(LlvmLibclog1pfExhaustiveTest, RoundDown) {
50   test_full_range(START, STOP, NUM_THREADS, mpfr::RoundingMode::Downward);
51 }
52 
53 TEST_F(LlvmLibclog1pfExhaustiveTest, RoundTowardZero) {
54   test_full_range(START, STOP, NUM_THREADS, mpfr::RoundingMode::TowardZero);
55 }
56