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IR: Implement FPMulAdd

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MerryMage
2018-06-06 20:03:12 +01:00
parent 24e3299276
commit 8c90fcf58e
7 changed files with 207 additions and 1 deletions
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38
src/common/fp_util.h
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@@ -41,6 +41,25 @@ inline boost::optional<u32> ProcessNaNs(u32 a, u32 b) {
return boost::none;
}
/// Given three arguments, return the NaN value which would be returned by an ARM processor.
/// If none of the arguments is a NaN, returns boost::none.
inline boost::optional<u32> ProcessNaNs(u32 a, u32 b, u32 c) {
if (IsSNaN(a)) {
return a | 0x00400000;
} else if (IsSNaN(b)) {
return b | 0x00400000;
} else if (IsSNaN(c)) {
return c | 0x00400000;
} else if (IsQNaN(a)) {
return a;
} else if (IsQNaN(b)) {
return b;
} else if (IsQNaN(c)) {
return c;
}
return boost::none;
}
/// Is 64-bit floating point value a QNaN?
constexpr bool IsQNaN(u64 value) {
return (value & 0x7FF8'0000'0000'0000) == 0x7FF8'0000'0000'0000;
@@ -72,5 +91,24 @@ inline boost::optional<u64> ProcessNaNs(u64 a, u64 b) {
return boost::none;
}
/// Given three arguments, return the NaN value which would be returned by an ARM processor.
/// If none of the arguments is a NaN, returns boost::none.
inline boost::optional<u64> ProcessNaNs(u64 a, u64 b, u64 c) {
if (IsSNaN(a)) {
return a | 0x0008'0000'0000'0000;
} else if (IsSNaN(b)) {
return b | 0x0008'0000'0000'0000;
} else if (IsSNaN(c)) {
return c | 0x0008'0000'0000'0000;
} else if (IsQNaN(a)) {
return a;
} else if (IsQNaN(b)) {
return b;
} else if (IsQNaN(c)) {
return c;
}
return boost::none;
}
} // namespace Common
} // namespace Dynarmic