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common/fp/op/FPRecipExponent: Add half-precision floating point specialization

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Lioncash 2019-03-09 17:31:17 -05:00 committed by MerryMage
parent a829c93406
commit eb3e0d5908
1 changed files with 5 additions and 16 deletions
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21
src/common/fp/op/FPRecipExponent.cpp
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@ -17,28 +17,16 @@
namespace Dynarmic::FP { namespace Dynarmic::FP {
namespace { namespace {
// We don't care about unreachable code warnings here
// TODO: Remove this warning disabling of warnings when
// half-float support is added.
#ifdef _MSC_VER
#pragma warning(disable:4702)
#endif
template <typename FPT> template <typename FPT>
FPT DetermineExponentValue(size_t value) { FPT DetermineExponentValue(size_t value) {
if constexpr (sizeof(FPT) == sizeof(u32)) { if constexpr (sizeof(FPT) == sizeof(u32)) {
return static_cast<FPT>(Common::Bits<23, 30>(value)); return static_cast<FPT>(Common::Bits<23, 30>(value));
} } else if constexpr (sizeof(FPT) == sizeof(u64)) {
if constexpr (sizeof(FPT) == sizeof(u64)) {
return static_cast<FPT>(Common::Bits<52, 62>(value)); return static_cast<FPT>(Common::Bits<52, 62>(value));
} } else {
// Half-float
return static_cast<FPT>(Common::Bits<10, 14>(value)); return static_cast<FPT>(Common::Bits<10, 14>(value));
}
} }
#ifdef _MSC_VER
#pragma warning(default:4702)
#endif
} // Anonymous namespace } // Anonymous namespace
template <typename FPT> template <typename FPT>
@ -50,7 +38,7 @@ FPT FPRecipExponent(FPT op, FPCR fpcr, FPSR& fpsr) {
return FPProcessNaN(type, op, fpcr, fpsr); return FPProcessNaN(type, op, fpcr, fpsr);
} }
const FPT sign_bits = FPInfo<FPT>::Zero(sign); const FPT sign_bits = FPT(FPInfo<FPT>::Zero(sign));
const FPT exponent = DetermineExponentValue<FPT>(op); const FPT exponent = DetermineExponentValue<FPT>(op);
// Zero and denormals // Zero and denormals
@ -64,6 +52,7 @@ FPT FPRecipExponent(FPT op, FPCR fpcr, FPSR& fpsr) {
return FPT(sign_bits | negated_exponent); return FPT(sign_bits | negated_exponent);
} }
template u16 FPRecipExponent<u16>(u16 op, FPCR fpcr, FPSR& fpsr);
template u32 FPRecipExponent<u32>(u32 op, FPCR fpcr, FPSR& fpsr); template u32 FPRecipExponent<u32>(u32 op, FPCR fpcr, FPSR& fpsr);
template u64 FPRecipExponent<u64>(u64 op, FPCR fpcr, FPSR& fpsr); template u64 FPRecipExponent<u64>(u64 op, FPCR fpcr, FPSR& fpsr);