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TSR Berry 2023-04-08 01:22:00 +02:00 • committed by Mary
parent cd124bda58
commit cee7121058
3466 changed files with 55 additions and 55 deletions
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src/ARMeilleure/Instructions/InstEmitCcmp.cs Normal file
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using ARMeilleure.Decoders;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
using ARMeilleure.Translation;
using static ARMeilleure.Instructions.InstEmitAluHelper;
using static ARMeilleure.Instructions.InstEmitFlowHelper;
using static ARMeilleure.Instructions.InstEmitHelper;
using static ARMeilleure.IntermediateRepresentation.Operand.Factory;
namespace ARMeilleure.Instructions
{
static partial class InstEmit
{
public static void Ccmn(ArmEmitterContext context) => EmitCcmp(context, isNegated: true);
public static void Ccmp(ArmEmitterContext context) => EmitCcmp(context, isNegated: false);
private static void EmitCcmp(ArmEmitterContext context, bool isNegated)
{
OpCodeCcmp op = (OpCodeCcmp)context.CurrOp;
Operand lblTrue = Label();
Operand lblEnd = Label();
EmitCondBranch(context, lblTrue, op.Cond);
SetFlag(context, PState.VFlag, Const((op.Nzcv >> 0) & 1));
SetFlag(context, PState.CFlag, Const((op.Nzcv >> 1) & 1));
SetFlag(context, PState.ZFlag, Const((op.Nzcv >> 2) & 1));
SetFlag(context, PState.NFlag, Const((op.Nzcv >> 3) & 1));
context.Branch(lblEnd);
context.MarkLabel(lblTrue);
Operand n = GetAluN(context);
Operand m = GetAluM(context);
if (isNegated)
{
Operand d = context.Add(n, m);
EmitNZFlagsCheck(context, d);
EmitAddsCCheck(context, n, d);
EmitAddsVCheck(context, n, m, d);
}
else
{
Operand d = context.Subtract(n, m);
EmitNZFlagsCheck(context, d);
EmitSubsCCheck(context, n, m);
EmitSubsVCheck(context, n, m, d);
}
context.MarkLabel(lblEnd);
}
}
}