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fp: Fix FPToFixed for borderline values

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This commit is contained in:
Merry 2023-01-15 23:59:27 +00:00
parent f3af94bc7c
commit 4f3ef50d5c
2 changed files with 19 additions and 1 deletions
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17
tests/fp/FPToFixed.cpp
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@ -38,3 +38,20 @@ TEST_CASE("FPToFixed", "[fp]") {
REQUIRE(fpsr.Value() == expected_fpsr);
}
}
TEST_CASE("FPToFixed edge cases", "[fp]") {
const std::vector<std::tuple<u64, u64, bool, FP::RoundingMode>> test_cases{
{0x41dffffffffffffe, 0x7fffffff, false, FP::RoundingMode::ToNearest_TieEven},
{0x41dffffffffffffe, 0x7fffffff, false, FP::RoundingMode::TowardsPlusInfinity},
{0x41dffffffffffffe, 0x7fffffff, false, FP::RoundingMode::TowardsMinusInfinity},
{0x41dffffffffffffe, 0x7fffffff, false, FP::RoundingMode::TowardsZero},
{0x41dffffffffffffe, 0x7fffffff, false, FP::RoundingMode::ToNearest_TieAwayFromZero},
};
const FPCR fpcr;
FPSR fpsr;
for (auto [input, expected_output, unsigned_, rounding_mode] : test_cases) {
const u64 output = FPToFixed<u64>(32, input, 0, unsigned_, fpcr, rounding_mode, fpsr);
REQUIRE(output == expected_output);
}
}