1 files changed, 81 insertions, 0 deletions
diff --git a/ChocolArm64/Instruction/AInstEmitCcmp.cs b/ChocolArm64/Instruction/AInstEmitCcmp.cs
new file mode 100644
index 00000000..7153a6a0
--- /dev/null
+++ b/ChocolArm64/Instruction/AInstEmitCcmp.cs
@@ -0,0 +1,81 @@
+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);
+        }
+    }
+}
+\ No newline at end of file