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diff --git a/sid/component/cgen-cpu/sh/sh3_model.h b/sid/component/cgen-cpu/sh/sh3_model.h
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+++ b/sid/component/cgen-cpu/sh/sh3_model.h
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+// sh3_model.h - Hand-written code for sh modelling. -*- C++ -*-
+
+// Common insn modelling functions for all sh models.
+
+// Copyright (C) 2006 Red Hat.
+// This file is part of SID and is licensed under the GPL.
+// See the file COPYING.SID for conditions for redistribution.
+
+#ifndef SH3_MODEL_IMPL_H
+#define SH3_MODEL_IMPL_H
+
+#include "common_model.h"
+
+namespace sh3
+{
+  class sh3_idesc;
+};
+
+namespace sh3e
+{
+  class sh3e_idesc;
+};
+
+// Model for sh3
+//
+template <class BASE, class CPU, class IDESC>
+class sh3_model : public BASE
+{
+public:
+  sh3_model (CPU* cpu);
+
+  virtual UINT model_u_use_tbit_before (CPU *cpu, const IDESC *idesc, int unit_num);
+
+  virtual UINT model_u_set_sr_bit_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_ldc_sr_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_macw_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_macl_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_dmul_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_mull_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_ldcl_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_trap_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+
+  virtual void step_latency (sid::host_int_4 cycles = 0);
+
+protected:
+  void advance_latency (sid::host_int_4 latency);
+  void set_sr_busy (sid::signed_host_int_4 cycles);
+
+  bool insn_is_tstb (const sh3::sh3_idesc *idesc);
+  bool insn_is_tstb (const sh3e::sh3e_idesc *idesc);
+
+protected:
+  sid::host_int_4 sr_busy;
+};
+
+// Model for sh3e
+//
+template <class BASE, class CPU, class IDESC>
+class sh3e_model : public sh3_model<BASE,CPU,IDESC>
+{
+public:
+  sh3e_model (CPU* cpu);
+
+  virtual UINT model_u_fpu_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_fcnv_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced);
+  virtual UINT model_u_fsqrt_after (CPU *cpu, const IDESC *idesc, int unit_num, unsigned long long referenced, INT loadreg);
+};
+
+#endif // SH3_MODEL_IMPL_H