From 1abd3bd7f3977eda406ed4eb279eb5b8b9fc447e Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Tue, 19 Apr 2022 08:37:13 -0400
Subject: [PATCH] Decode SWAP.

---
 InstructionSets/68k/Decoder.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/InstructionSets/68k/Decoder.cpp b/InstructionSets/68k/Decoder.cpp
index 3ca54ab04..28735d6d2 100644
--- a/InstructionSets/68k/Decoder.cpp
+++ b/InstructionSets/68k/Decoder.cpp
@@ -371,6 +371,15 @@ template <uint8_t op, bool validate> Preinstruction Predecoder<model>::decode(ui
 				AddressingMode::DataRegisterDirect, ea_register,
 				AddressingMode::ImmediateData, 0);
 
+		//
+		// MARK: SWAP
+		//
+		// b0–b2:		a data register.
+		//
+		case OpT(Operation::SWAP):
+			return Preinstruction(operation,
+				AddressingMode::DataRegisterDirect, ea_register);
+
 		//
 		// MARK: MOVEMtoMw, MOVEMtoMl, MOVEMtoRw, MOVEMtoRl
 		//