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tests/fp: Add FPRound tests

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This commit is contained in:
MerryMage 2018-06-28 21:46:16 +01:00
parent 8668d61881
commit 52ed365158
1 changed files with 36 additions and 0 deletions
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36
tests/fp/unpacked_tests.cpp
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@ -7,6 +7,7 @@
#include <catch.hpp> #include <catch.hpp>
#include "common/fp/unpacked.h" #include "common/fp/unpacked.h"
#include "rand_int.h"
using namespace Dynarmic; using namespace Dynarmic;
using namespace Dynarmic::FP; using namespace Dynarmic::FP;
@ -21,6 +22,7 @@ TEST_CASE("FPUnpack Tests", "[fp]") {
{0x7FC00001, {FPType::QNaN, false, {false, 0, 0}}, 0}, {0x7FC00001, {FPType::QNaN, false, {false, 0, 0}}, 0},
{0xFFC00001, {FPType::QNaN, true, {true, 0, 0}}, 0}, {0xFFC00001, {FPType::QNaN, true, {true, 0, 0}}, 0},
{0x00000001, {FPType::Nonzero, false, {false, -149, 1}}, 0}, // Smallest single precision denormal is 2^-149. {0x00000001, {FPType::Nonzero, false, {false, -149, 1}}, 0}, // Smallest single precision denormal is 2^-149.
{0x3F7FFFFF, {FPType::Nonzero, false, {false, -24, 0xFFFFFF}}, 0}, // 1.0 - epsilon
}; };
const FPCR fpcr; const FPCR fpcr;
@ -33,3 +35,37 @@ TEST_CASE("FPUnpack Tests", "[fp]") {
REQUIRE(fpsr.Value() == expected_fpsr); REQUIRE(fpsr.Value() == expected_fpsr);
} }
} }
TEST_CASE("FPRound Tests", "[fp]") {
const static std::vector<std::tuple<u32, std::tuple<FPType, bool, FPUnpacked<u64>>, u32>> test_cases {
{0x7F800000, {FPType::Infinity, false, {false, 1000000, 1}}, 0x14},
{0xFF800000, {FPType::Infinity, true, {true, 1000000, 1}}, 0x14},
{0x00000001, {FPType::Nonzero, false, {false, -149, 1}}, 0}, // Smallest single precision denormal is 2^-149.
{0x3F7FFFFF, {FPType::Nonzero, false, {false, -24, 0xFFFFFF}}, 0}, // 1.0 - epsilon
{0x3F800000, {FPType::Nonzero, false, {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);
}
}