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- /* This file is part of the dynarmic project.
- * Copyright (c) 2018 MerryMage
- * SPDX-License-Identifier: 0BSD
- */
- #include <tuple>
- #include <vector>
- #include <catch2/catch_test_macros.hpp>
- #include <mcl/stdint.hpp>
- #include "../rand_int.h"
- #include "dynarmic/common/fp/fpcr.h"
- #include "dynarmic/common/fp/fpsr.h"
- #include "dynarmic/common/fp/unpacked.h"
- using namespace Dynarmic;
- using namespace Dynarmic::FP;
- TEST_CASE("FPUnpack Tests", "[fp]") {
- const static std::vector<std::tuple<u32, std::tuple<FPType, bool, FPUnpacked>, u32>> test_cases{
- {0x00000000, {FPType::Zero, false, ToNormalized(false, 0, 0)}, 0},
- {0x7F800000, {FPType::Infinity, false, ToNormalized(false, 1000000, 1)}, 0},
- {0xFF800000, {FPType::Infinity, true, ToNormalized(true, 1000000, 1)}, 0},
- {0x7F800001, {FPType::SNaN, false, ToNormalized(false, 0, 0)}, 0},
- {0xFF800001, {FPType::SNaN, true, ToNormalized(true, 0, 0)}, 0},
- {0x7FC00001, {FPType::QNaN, false, ToNormalized(false, 0, 0)}, 0},
- {0xFFC00001, {FPType::QNaN, true, ToNormalized(true, 0, 0)}, 0},
- {0x00000001, {FPType::Nonzero, false, ToNormalized(false, -149, 1)}, 0}, // Smallest single precision denormal is 2^-149.
- {0x3F7FFFFF, {FPType::Nonzero, false, ToNormalized(false, -24, 0xFFFFFF)}, 0}, // 1.0 - epsilon
- };
- const FPCR fpcr;
- for (const auto& [input, expected_output, expected_fpsr] : test_cases) {
- FPSR fpsr;
- const auto output = FPUnpack<u32>(input, fpcr, fpsr);
- INFO("Input: " << std::hex << input);
- INFO("Output Sign: " << std::get<2>(output).sign);
- INFO("Output Exponent: " << std::get<2>(output).exponent);
- INFO("Output Mantissa: " << std::hex << std::get<2>(output).mantissa);
- INFO("Expected Sign: " << std::get<2>(expected_output).sign);
- INFO("Expected Exponent: " << std::get<2>(expected_output).exponent);
- INFO("Expected Mantissa: " << std::hex << std::get<2>(expected_output).mantissa);
- REQUIRE(output == expected_output);
- REQUIRE(fpsr.Value() == expected_fpsr);
- }
- }
- TEST_CASE("FPRound Tests", "[fp]") {
- const static std::vector<std::tuple<u32, std::tuple<FPType, bool, FPUnpacked>, u32>> test_cases{
- {0x7F800000, {FPType::Infinity, false, ToNormalized(false, 1000000, 1)}, 0x14},
- {0xFF800000, {FPType::Infinity, true, ToNormalized(true, 1000000, 1)}, 0x14},
- {0x00000001, {FPType::Nonzero, false, ToNormalized(false, -149, 1)}, 0}, // Smallest single precision denormal is 2^-149.
- {0x3F7FFFFF, {FPType::Nonzero, false, ToNormalized(false, -24, 0xFFFFFF)}, 0}, // 1.0 - epsilon
- {0x3F800000, {FPType::Nonzero, false, ToNormalized(false, -28, 0xFFFFFFF)}, 0x10}, // rounds to 1.0
- };
- const FPCR fpcr;
- for (const auto& [expected_output, input, expected_fpsr] : test_cases) {
- FPSR fpsr;
- const auto output = FPRound<u32>(std::get<2>(input), fpcr, fpsr);
- INFO("Expected Output: " << std::hex << expected_output);
- REQUIRE(output == expected_output);
- REQUIRE(fpsr.Value() == expected_fpsr);
- }
- }
- TEST_CASE("FPUnpack<->FPRound Round-trip Tests", "[fp]") {
- const FPCR fpcr;
- for (size_t count = 0; count < 100000; count++) {
- FPSR fpsr;
- const u32 input = RandInt(0, 1) == 0 ? RandInt<u32>(0x00000001, 0x7F800000) : RandInt<u32>(0x80000001, 0xFF800000);
- const auto intermediate = std::get<2>(FPUnpack<u32>(input, fpcr, fpsr));
- const u32 output = FPRound<u32>(intermediate, fpcr, fpsr);
- INFO("Count: " << count);
- INFO("Intermediate Values: " << std::hex << intermediate.sign << ';' << intermediate.exponent << ';' << intermediate.mantissa);
- REQUIRE(input == output);
- }
- }
- TEST_CASE("FPRound (near zero, round to posinf)", "[fp]") {
- const FPUnpacked input = {false, -353, 0x0a98d25ace5b2000};
- FPSR fpsr;
- FPCR fpcr;
- fpcr.RMode(RoundingMode::TowardsPlusInfinity);
- const u32 output = FPRound<u32>(input, fpcr, fpsr);
- REQUIRE(output == 0x00000001);
- }
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