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Implement fixed-point variant of the UCVTF and SCVTF instructions (#578)

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* Add fixed-point variant of the UCVTF instruction

* Change encoding of some fixed-point instructions to not allow invalid encodings

* Fix Fcvtzu_Gp_Fixed encoding

* Add SCVTF (fixed-point GP to Scalar) instruction

* Simplify *Fixed encodings
This commit is contained in:
gdkchan 2019-02-23 20:52:48 -03:00 • committed by GitHub
parent 7ed2b4cc39
commit 9679896b94
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3 changed files with 76 additions and 47 deletions
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9
ChocolArm64/Decoders/OpCodeSimdCvt64.cs
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@ -8,18 +8,9 @@ namespace ChocolArm64.Decoders
public OpCodeSimdCvt64(Inst inst, long position, int opCode) : base(inst, position, opCode)
{
//TODO:
//Und of Fixed Point variants.
int scale = (opCode >> 10) & 0x3f;
int sf = (opCode >> 31) & 0x1;
/*if (Type != SF && !(Type == 2 && SF == 1))
{
Emitter = AInstEmit.Und;
return;
}*/
FBits = 64 - scale;
RegisterSize = sf != 0