| //===-- Unittests for powf ------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "hdr/math_macros.h" |
| #include "src/__support/FPUtil/FPBits.h" |
| #include "src/math/powf.h" |
| #include "test/UnitTest/FPMatcher.h" |
| #include "test/UnitTest/Test.h" |
| #include "utils/MPFRWrapper/MPFRUtils.h" |
| |
| #include <errno.h> |
| #include <stdint.h> |
| |
| using LlvmLibcPowfTest = LIBC_NAMESPACE::testing::FPTest<float>; |
| using LIBC_NAMESPACE::testing::tlog; |
| |
| namespace mpfr = LIBC_NAMESPACE::testing::mpfr; |
| |
| TEST_F(LlvmLibcPowfTest, TrickyInputs) { |
| constexpr int N = 13; |
| constexpr mpfr::BinaryInput<float> INPUTS[N] = { |
| {0x1.290bbp-124f, 0x1.1e6d92p-25f}, |
| {0x1.2e9fb6p+5f, -0x1.1b82b6p-18f}, |
| {0x1.6877f6p+60f, -0x1.75f1c6p-4f}, |
| {0x1.0936acp-63f, -0x1.55200ep-15f}, |
| {0x1.d6d72ap+43f, -0x1.749ccap-5f}, |
| {0x1.4afb2ap-40f, 0x1.063198p+0f}, |
| {0x1.0124dep+0f, -0x1.fdb016p+9f}, |
| {0x1.1058p+0f, 0x1.ap+64f}, |
| {0x1.1058p+0f, -0x1.ap+64f}, |
| {0x1.1058p+0f, 0x1.ap+64f}, |
| {0x1.fa32d4p-1f, 0x1.67a62ep+12f}, |
| {-0x1.8p-49, 0x1.8p+1}, |
| {0x1.8p-48, 0x1.8p+1}, |
| }; |
| |
| for (int i = 0; i < N; ++i) { |
| float x = INPUTS[i].x; |
| float y = INPUTS[i].y; |
| EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Pow, INPUTS[i], |
| LIBC_NAMESPACE::powf(x, y), 0.5); |
| } |
| } |
| |
| TEST_F(LlvmLibcPowfTest, InFloatRange) { |
| constexpr uint32_t X_COUNT = 1'23; |
| constexpr uint32_t X_START = FPBits(0.25f).uintval(); |
| constexpr uint32_t X_STOP = FPBits(4.0f).uintval(); |
| constexpr uint32_t X_STEP = (X_STOP - X_START) / X_COUNT; |
| |
| constexpr uint32_t Y_COUNT = 1'37; |
| constexpr uint32_t Y_START = FPBits(0.25f).uintval(); |
| constexpr uint32_t Y_STOP = FPBits(4.0f).uintval(); |
| constexpr uint32_t Y_STEP = (Y_STOP - Y_START) / Y_COUNT; |
| |
| auto test = [&](mpfr::RoundingMode rounding_mode) { |
| mpfr::ForceRoundingMode __r(rounding_mode); |
| if (!__r.success) |
| return; |
| |
| uint64_t fails = 0; |
| uint64_t count = 0; |
| uint64_t cc = 0; |
| float mx, my, mr = 0.0; |
| double tol = 0.5; |
| |
| for (uint32_t i = 0, v = X_START; i <= X_COUNT; ++i, v += X_STEP) { |
| float x = FPBits(v).get_val(); |
| if (isnan(x) || isinf(x) || x < 0.0) |
| continue; |
| |
| for (uint32_t j = 0, w = Y_START; j <= Y_COUNT; ++j, w += Y_STEP) { |
| float y = FPBits(w).get_val(); |
| if (isnan(y) || isinf(y)) |
| continue; |
| |
| LIBC_NAMESPACE::libc_errno = 0; |
| float result = LIBC_NAMESPACE::powf(x, y); |
| ++cc; |
| if (isnan(result) || isinf(result)) |
| continue; |
| |
| ++count; |
| mpfr::BinaryInput<float> inputs{x, y}; |
| |
| if (!TEST_MPFR_MATCH_ROUNDING_SILENTLY(mpfr::Operation::Pow, inputs, |
| result, 0.5, rounding_mode)) { |
| ++fails; |
| while (!TEST_MPFR_MATCH_ROUNDING_SILENTLY( |
| mpfr::Operation::Pow, inputs, result, tol, rounding_mode)) { |
| mx = x; |
| my = y; |
| mr = result; |
| |
| if (tol > 1000.0) |
| break; |
| |
| tol *= 2.0; |
| } |
| } |
| } |
| } |
| if (fails || (count < cc)) { |
| tlog << " Powf failed: " << fails << "/" << count << "/" << cc |
| << " tests.\n" |
| << " Max ULPs is at most: " << static_cast<uint64_t>(tol) << ".\n"; |
| } |
| if (fails) { |
| mpfr::BinaryInput<float> inputs{mx, my}; |
| EXPECT_MPFR_MATCH(mpfr::Operation::Pow, inputs, mr, 0.5, rounding_mode); |
| } |
| }; |
| |
| tlog << " Test Rounding To Nearest...\n"; |
| test(mpfr::RoundingMode::Nearest); |
| |
| tlog << " Test Rounding Downward...\n"; |
| test(mpfr::RoundingMode::Downward); |
| |
| tlog << " Test Rounding Upward...\n"; |
| test(mpfr::RoundingMode::Upward); |
| |
| tlog << " Test Rounding Toward Zero...\n"; |
| test(mpfr::RoundingMode::TowardZero); |
| } |