81 lines
No EOL
2 KiB
C#
81 lines
No EOL
2 KiB
C#
using ChocolArm64.Decoder;
|
|
using ChocolArm64.State;
|
|
using ChocolArm64.Translation;
|
|
using System;
|
|
using System.Reflection.Emit;
|
|
|
|
using static ChocolArm64.Instruction.AInstEmitAluHelper;
|
|
|
|
namespace ChocolArm64.Instruction
|
|
{
|
|
static partial class AInstEmit
|
|
{
|
|
private enum CcmpOp
|
|
{
|
|
Cmp,
|
|
Cmn
|
|
}
|
|
|
|
public static void Ccmn(AILEmitterCtx Context) => EmitCcmp(Context, CcmpOp.Cmn);
|
|
public static void Ccmp(AILEmitterCtx Context) => EmitCcmp(Context, CcmpOp.Cmp);
|
|
|
|
private static void EmitCcmp(AILEmitterCtx Context, CcmpOp CmpOp)
|
|
{
|
|
AOpCodeCcmp Op = (AOpCodeCcmp)Context.CurrOp;
|
|
|
|
AILLabel LblTrue = new AILLabel();
|
|
AILLabel LblEnd = new AILLabel();
|
|
|
|
Context.EmitCondBranch(LblTrue, Op.Cond);
|
|
|
|
Context.EmitLdc_I4((Op.NZCV >> 0) & 1);
|
|
|
|
Context.EmitStflg((int)APState.VBit);
|
|
|
|
Context.EmitLdc_I4((Op.NZCV >> 1) & 1);
|
|
|
|
Context.EmitStflg((int)APState.CBit);
|
|
|
|
Context.EmitLdc_I4((Op.NZCV >> 2) & 1);
|
|
|
|
Context.EmitStflg((int)APState.ZBit);
|
|
|
|
Context.EmitLdc_I4((Op.NZCV >> 3) & 1);
|
|
|
|
Context.EmitStflg((int)APState.NBit);
|
|
|
|
Context.Emit(OpCodes.Br_S, LblEnd);
|
|
|
|
Context.MarkLabel(LblTrue);
|
|
|
|
EmitDataLoadOpers(Context);
|
|
|
|
if (CmpOp == CcmpOp.Cmp)
|
|
{
|
|
Context.Emit(OpCodes.Sub);
|
|
|
|
Context.EmitZNFlagCheck();
|
|
|
|
EmitSubsCCheck(Context);
|
|
EmitSubsVCheck(Context);
|
|
}
|
|
else if (CmpOp == CcmpOp.Cmn)
|
|
{
|
|
Context.Emit(OpCodes.Add);
|
|
|
|
Context.EmitZNFlagCheck();
|
|
|
|
EmitAddsCCheck(Context);
|
|
EmitAddsVCheck(Context);
|
|
}
|
|
else
|
|
{
|
|
throw new ArgumentException(nameof(CmpOp));
|
|
}
|
|
|
|
Context.Emit(OpCodes.Pop);
|
|
|
|
Context.MarkLabel(LblEnd);
|
|
}
|
|
}
|
|
} |