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Fix corner cases of ADCS and SBFM

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This commit is contained in:
gdkchan 2018-02-26 15:56:34 -03:00
parent 0371553a27
commit 1cb0bbe585
3 changed files with 26 additions and 10 deletions
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2
Instruction/AInstEmitAlu.cs
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@ -39,7 +39,7 @@ namespace ChocolArm64.Instruction
{
Context.EmitZNFlagCheck();
EmitAddsCCheck(Context);
EmitAdcsCCheck(Context);
EmitAddsVCheck(Context);
}

25
Instruction/AInstEmitAluHelper.cs
View file

@ -7,6 +7,31 @@ namespace ChocolArm64.Instruction
{
static class AInstEmitAluHelper
{
public static void EmitAdcsCCheck(AILEmitterCtx Context)
{
//C = (Rd == Rn && CIn) || Rd < Rn
Context.EmitSttmp();
Context.EmitLdtmp();
Context.EmitLdtmp();
EmitDataLoadRn(Context);
Context.Emit(OpCodes.Ceq);
Context.EmitLdflg((int)APState.CBit);
Context.Emit(OpCodes.And);
Context.EmitLdtmp();
EmitDataLoadRn(Context);
Context.Emit(OpCodes.Clt_Un);
Context.Emit(OpCodes.Or);
Context.EmitStflg((int)APState.CBit);
}
public static void EmitAddsCCheck(AILEmitterCtx Context)
{
//C = Rd < Rn

9
Instruction/AInstEmitBfm.cs
View file

@ -54,15 +54,6 @@ namespace ChocolArm64.Instruction
{
EmitSbfmCast(Context, OpCodes.Conv_I4);
}
else if (Op.Shift == 0)
{
Context.EmitLdintzr(Op.Rn);
Context.EmitLsl(BitsCount - 1 - Op.Pos);
Context.EmitAsr(BitsCount - 1);
Context.EmitStintzr(Op.Rd);
}
else
{
EmitBfmLoadRn(Context);