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53 lines
1.7 KiB
C#
53 lines
1.7 KiB
C#
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using ARMeilleure.Decoders;
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using ARMeilleure.IntermediateRepresentation;
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using ARMeilleure.Translation;
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using static ARMeilleure.Instructions.InstEmitFlowHelper;
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using static ARMeilleure.Instructions.InstEmitHelper;
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using static ARMeilleure.IntermediateRepresentation.OperandHelper;
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namespace ARMeilleure.Instructions
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{
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static partial class InstEmit
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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(ArmEmitterContext context) => EmitCsel(context, CselOperation.None);
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public static void Csinc(ArmEmitterContext context) => EmitCsel(context, CselOperation.Increment);
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public static void Csinv(ArmEmitterContext context) => EmitCsel(context, CselOperation.Invert);
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public static void Csneg(ArmEmitterContext context) => EmitCsel(context, CselOperation.Negate);
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private static void EmitCsel(ArmEmitterContext context, CselOperation cselOp)
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{
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OpCodeCsel op = (OpCodeCsel)context.CurrOp;
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Operand n = GetIntOrZR(context, op.Rn);
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Operand m = GetIntOrZR(context, op.Rm);
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if (cselOp == CselOperation.Increment)
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{
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m = context.Add(m, Const(m.Type, 1));
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}
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else if (cselOp == CselOperation.Invert)
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{
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m = context.BitwiseNot(m);
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}
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else if (cselOp == CselOperation.Negate)
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{
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m = context.Negate(m);
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}
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Operand condTrue = GetCondTrue(context, op.Cond);
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Operand d = context.ConditionalSelect(condTrue, n, m);
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SetIntOrZR(context, op.Rd, d);
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}
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}
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}
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