59 lines
1.7 KiB
C#
59 lines
1.7 KiB
C#
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using ChocolArm64.Decoder;
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using ChocolArm64.Translation;
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using System.Reflection.Emit;
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namespace ChocolArm64.Instruction
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{
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static partial class AInstEmit
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{
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private enum CselOperation
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{
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None,
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Increment,
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Invert,
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Negate
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}
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public static void Csel(AILEmitterCtx Context) => EmitCsel(Context, CselOperation.None);
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public static void Csinc(AILEmitterCtx Context) => EmitCsel(Context, CselOperation.Increment);
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public static void Csinv(AILEmitterCtx Context) => EmitCsel(Context, CselOperation.Invert);
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public static void Csneg(AILEmitterCtx Context) => EmitCsel(Context, CselOperation.Negate);
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private static void EmitCsel(AILEmitterCtx Context, CselOperation CselOp)
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{
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AOpCodeCsel Op = (AOpCodeCsel)Context.CurrOp;
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AILLabel LblTrue = new AILLabel();
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AILLabel LblEnd = new AILLabel();
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Context.EmitCondBranch(LblTrue, Op.Cond);
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Context.EmitLdintzr(Op.Rm);
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if (CselOp == CselOperation.Increment)
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{
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Context.EmitLdc_I(1);
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Context.Emit(OpCodes.Add);
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}
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else if (CselOp == CselOperation.Invert)
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{
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Context.Emit(OpCodes.Not);
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}
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else if (CselOp == CselOperation.Negate)
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{
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Context.Emit(OpCodes.Neg);
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}
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Context.EmitStintzr(Op.Rd);
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Context.Emit(OpCodes.Br_S, LblEnd);
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Context.MarkLabel(LblTrue);
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Context.EmitLdintzr(Op.Rn);
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Context.EmitStintzr(Op.Rd);
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Context.MarkLabel(LblEnd);
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}
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}
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}
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