CRIS insn translation

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index 0000000..cbd422d
@@ -0,0 +1,2507 @@
+/*
+ *  CRIS emulation for qemu: main translation routines.
+ * 
+ *  Copyright (c) 2007 AXIS Communications AB
+ *  Written by Edgar E. Iglesias.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ * This file implements a CRIS decoder-stage in SW. The decoder translates the
+ * guest (CRIS) machine-code into host machine code via dyngen using the 
+ * micro-operations described in op.c
+ *
+ * The micro-operations for CRIS translation implement a RISC style ISA.
+ * Note that the micro-operations typically order their operands 
+ * starting with the dst. CRIS asm, does the opposite.
+ *
+ * For example the following CRIS code:
+ * add.d [$r0], $r1
+ *
+ * translates into:
+ *
+ * gen_movl_T0_reg(0);   // Fetch $r0 into T0
+ * gen_load_T0_T0();     // Load T0, @T0
+ * gen_movl_reg_T0(1);   // Writeback T0 into $r1 
+ *
+ * The actual names for the micro-code generators vary but the example
+ * illustrates the point.
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <assert.h>
+
+#include "cpu.h"
+#include "exec-all.h"
+#include "disas.h"
+#include "crisv32-decode.h"
+
+#define CRIS_STATS 0
+#if CRIS_STATS
+#define STATS(x) x
+#else
+#define STATS(x)
+#endif
+
+#define DISAS_CRIS 0
+#if DISAS_CRIS
+#define DIS(x) x
+#else
+#define DIS(x)
+#endif
+
+#ifdef USE_DIRECT_JUMP
+#define TBPARAM(x)
+#else
+#define TBPARAM(x) (long)(x)
+#endif
+
+#define BUG() (gen_BUG(dc, __FILE__, __LINE__))
+#define BUG_ON(x) ({if (x) BUG();})
+
+/* Used by the decoder.  */
+#define EXTRACT_FIELD(src, start, end) \
+            (((src) >> start) & ((1 << (end - start + 1)) - 1))
+
+#define CC_MASK_NZ 0xc
+#define CC_MASK_NZV 0xe
+#define CC_MASK_NZVC 0xf
+#define CC_MASK_RNZV 0x10e
+
+static uint16_t *gen_opc_ptr;
+static uint32_t *gen_opparam_ptr;
+
+enum {
+#define DEF(s, n, copy_size) INDEX_op_ ## s,
+#include "opc.h"
+#undef DEF
+    NB_OPS,
+};
+#include "gen-op.h"
+
+/* This is the state at translation time.  */
+typedef struct DisasContext {
+	CPUState *env;
+	target_ulong pc, insn_pc;
+
+	/* Decoder.  */
+	uint32_t ir;
+	uint32_t opcode;
+	unsigned int op1;
+	unsigned int op2;
+	unsigned int zsize, zzsize;
+	unsigned int mode;
+	unsigned int postinc;
+
+
+	struct
+	{
+		int op;
+		int size;
+		unsigned int mask;
+	} cc_state[3];
+	int cc_i;
+
+	int update_cc;
+	int cc_op;
+	int cc_size;
+	uint32_t cc_mask;
+	int flags_live;
+	int flagx_live;
+	int flags_x;
+	uint32_t tb_entry_flags;
+
+	int memidx; /* user or kernel mode.  */
+	int is_jmp;
+	int dyn_jmp;
+
+	uint32_t delayed_pc;
+	int delayed_branch;
+	int bcc;
+	uint32_t condlabel;
+
+	struct TranslationBlock *tb;
+	int singlestep_enabled;
+} DisasContext;
+
+void cris_prepare_jmp (DisasContext *dc, uint32_t dst);
+static void gen_BUG(DisasContext *dc, char *file, int line)
+{
+	printf ("BUG: pc=%x %s %d\n", dc->pc, file, line); 
+	fprintf (logfile, "BUG: pc=%x %s %d\n", dc->pc, file, line); 
+	cpu_dump_state (dc->env, stdout, fprintf, 0);	
+	fflush(NULL);
+	cris_prepare_jmp (dc, 0x70000000 + line);
+}
+
+/* Table to generate quick moves from T0 onto any register.  */
+static GenOpFunc *gen_movl_reg_T0[16] = 
+{
+	gen_op_movl_r0_T0, gen_op_movl_r1_T0,
+	gen_op_movl_r2_T0, gen_op_movl_r3_T0,
+	gen_op_movl_r4_T0, gen_op_movl_r5_T0,
+	gen_op_movl_r6_T0, gen_op_movl_r7_T0,
+	gen_op_movl_r8_T0, gen_op_movl_r9_T0,
+	gen_op_movl_r10_T0, gen_op_movl_r11_T0,
+	gen_op_movl_r12_T0, gen_op_movl_r13_T0,
+	gen_op_movl_r14_T0, gen_op_movl_r15_T0,
+};
+static GenOpFunc *gen_movl_T0_reg[16] = 
+{
+	gen_op_movl_T0_r0, gen_op_movl_T0_r1,
+	gen_op_movl_T0_r2, gen_op_movl_T0_r3,
+	gen_op_movl_T0_r4, gen_op_movl_T0_r5,
+	gen_op_movl_T0_r6, gen_op_movl_T0_r7,
+	gen_op_movl_T0_r8, gen_op_movl_T0_r9,
+	gen_op_movl_T0_r10, gen_op_movl_T0_r11,
+	gen_op_movl_T0_r12, gen_op_movl_T0_r13,
+	gen_op_movl_T0_r14, gen_op_movl_T0_r15,
+};
+
+static void noop_write(void) {
+	/* nop.  */
+}
+
+static void gen_vr_read(void) {
+	gen_op_movl_T0_im(32);
+}
+
+static void gen_ccs_read(void) {
+	gen_op_movl_T0_p13();
+}
+
+static void gen_ccs_write(void) {
+	gen_op_movl_p13_T0();
+}
+
+/* Table to generate quick moves from T0 onto any register.  */
+static GenOpFunc *gen_movl_preg_T0[16] = 
+{
+	noop_write,  /* bz, not writeable.  */
+	noop_write,  /* vr, not writeable.  */
+	gen_op_movl_p2_T0, gen_op_movl_p3_T0,
+	noop_write,  /* wz, not writeable.  */
+	gen_op_movl_p5_T0,
+	gen_op_movl_p6_T0, gen_op_movl_p7_T0,
+	noop_write,  /* dz, not writeable.  */
+	gen_op_movl_p9_T0,
+	gen_op_movl_p10_T0, gen_op_movl_p11_T0,
+	gen_op_movl_p12_T0, 
+	gen_ccs_write, /* ccs needs special treatment.  */
+	gen_op_movl_p14_T0, gen_op_movl_p15_T0,
+};
+static GenOpFunc *gen_movl_T0_preg[16] = 
+{
+	gen_op_movl_T0_p0, 
+	gen_vr_read,
+	gen_op_movl_T0_p2, gen_op_movl_T0_p3,
+	gen_op_movl_T0_p4, gen_op_movl_T0_p5,
+	gen_op_movl_T0_p6, gen_op_movl_T0_p7,
+	gen_op_movl_T0_p8, gen_op_movl_T0_p9,
+	gen_op_movl_T0_p10, gen_op_movl_T0_p11,
+	gen_op_movl_T0_p12, 
+	gen_ccs_read, /* ccs needs special treatment.  */
+	gen_op_movl_T0_p14, gen_op_movl_T0_p15,
+};
+
+/* We need this table to handle moves with implicit width.  */
+int preg_sizes[] = {
+	1, /* bz.  */
+	1, /* vr.  */
+	4, /* pid.  */
+	1, /* srs.  */
+	2, /* wz.  */
+	4, 4, 4,
+	4, 4, 4, 4,
+	4, 4, 4, 4,
+};
+
+#ifdef CONFIG_USER_ONLY
+#define GEN_OP_LD(width, reg) \
+  void gen_op_ld##width##_T0_##reg (DisasContext *dc) { \
+    gen_op_ld##width##_T0_##reg##_raw(); \
+  }
+#define GEN_OP_ST(width, reg) \
+  void gen_op_st##width##_##reg##_T1 (DisasContext *dc) { \
+    gen_op_st##width##_##reg##_T1_raw(); \
+  }
+#else
+#define GEN_OP_LD(width, reg) \
+  void gen_op_ld##width##_T0_##reg (DisasContext *dc) { \
+    if (dc->memidx) gen_op_ld##width##_T0_##reg##_kernel(); \
+    else gen_op_ld##width##_T0_##reg##_user();\
+  }
+#define GEN_OP_ST(width, reg) \
+  void gen_op_st##width##_##reg##_T1 (DisasContext *dc) { \
+    if (dc->memidx) gen_op_st##width##_##reg##_T1_kernel(); \
+    else gen_op_st##width##_##reg##_T1_user();\
+  }
+#endif
+
+GEN_OP_LD(ub, T0)
+GEN_OP_LD(b, T0)
+GEN_OP_ST(b, T0)
+GEN_OP_LD(uw, T0)
+GEN_OP_LD(w, T0)
+GEN_OP_ST(w, T0)
+GEN_OP_LD(l, T0)
+GEN_OP_ST(l, T0)
+
+static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
+{
+	TranslationBlock *tb;
+	tb = dc->tb;
+	if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
+		if (n == 0)
+			gen_op_goto_tb0(TBPARAM(tb));
+		else
+			gen_op_goto_tb1(TBPARAM(tb));
+		gen_op_movl_T0_0();
+	} else {
+		gen_op_movl_T0_0();
+	}
+	gen_op_exit_tb();
+}
+
+/* Sign extend at translation time.  */
+static int sign_extend(unsigned int val, unsigned int width)
+{
+	int sval;
+
+	/* LSL.  */
+	val <<= 31 - width;
+	sval = val;
+	/* ASR.  */
+	sval >>= 31 - width;
+	return sval;
+}
+
+static void cris_evaluate_flags(DisasContext *dc)
+{
+	if (!dc->flags_live) {
+
+		switch (dc->cc_op)
+		{
+			case CC_OP_MCP:
+				gen_op_evaluate_flags_mcp ();
+				break;
+			case CC_OP_MULS:
+				gen_op_evaluate_flags_muls ();
+				break;
+			case CC_OP_MULU:
+				gen_op_evaluate_flags_mulu ();
+				break;
+			case CC_OP_MOVE:
+				switch (dc->cc_size)
+				{
+					case 4:
+						gen_op_evaluate_flags_move_4();
+						break;
+					case 2:
+						gen_op_evaluate_flags_move_2();
+						break;
+					default:
+						gen_op_evaluate_flags ();
+						break;
+				}
+				break;
+
+			default:
+			{
+				switch (dc->cc_size)
+				{
+					case 4:
+						gen_op_evaluate_flags_alu_4 ();
+						break;
+					default:
+						gen_op_evaluate_flags ();
+						break;
+				}
+			}
+			break;
+		}
+		dc->flags_live = 1;
+	}
+}
+
+static void cris_cc_mask(DisasContext *dc, unsigned int mask)
+{
+	uint32_t ovl;
+
+	ovl = (dc->cc_mask ^ mask) & ~mask;
+	if (ovl) {
+		/* TODO: optimize this case. It trigs all the time.  */
+		cris_evaluate_flags (dc);
+	}
+	dc->cc_mask = mask;
+
+	dc->update_cc = 1;
+	if (mask == 0)
+		dc->update_cc = 0;
+	else {
+		gen_op_update_cc_mask(mask);
+		dc->flags_live = 0;
+	}
+}
+
+static void cris_update_cc_op(DisasContext *dc, int op)
+{
+	dc->cc_op = op;
+	gen_op_update_cc_op(op);	
+	dc->flags_live = 0;
+}
+static void cris_update_cc_size(DisasContext *dc, int size)
+{
+	dc->cc_size = size;
+	gen_op_update_cc_size_im(size);
+}
+
+/* op is the operation.
+   T0, T1 are the operands.  
+   dst is the destination reg.
+*/
+static void crisv32_alu_op(DisasContext *dc, int op, int rd, int size)
+{
+	int writeback = 1;
+	if (dc->update_cc) {
+		cris_update_cc_op(dc, op);
+		cris_update_cc_size(dc, size);
+		gen_op_update_cc_x(dc->flagx_live, dc->flags_x);
+		gen_op_update_cc_dest_T0();
+	}
+
+	/* Emit the ALU insns.  */
+	switch (op)
+	{
+		case CC_OP_ADD:
+			gen_op_addl_T0_T1();
+			/* Extended arithmetics.  */
+			if (!dc->flagx_live)
+				gen_op_addxl_T0_C();
+			else if (dc->flags_x)
+				gen_op_addxl_T0_C();
+			break;
+		case CC_OP_ADDC:
+			gen_op_addl_T0_T1();
+			gen_op_addl_T0_C();
+			break;
+		case CC_OP_MCP:
+			gen_op_addl_T0_T1();
+			gen_op_addl_T0_R();
+			break;
+		case CC_OP_SUB:
+			gen_op_negl_T1_T1();
+			gen_op_addl_T0_T1();
+			/* CRIS flag evaluation needs ~src.  */
+			gen_op_negl_T1_T1();
+			gen_op_not_T1_T1();
+
+			/* Extended arithmetics.  */
+			if (!dc->flagx_live)
+				gen_op_subxl_T0_C();
+			else if (dc->flags_x)
+				gen_op_subxl_T0_C();
+			break;
+		case CC_OP_MOVE:
+			gen_op_movl_T0_T1();
+			break;
+		case CC_OP_OR:
+			gen_op_orl_T0_T1();
+			break;
+		case CC_OP_AND:
+			gen_op_andl_T0_T1();
+			break;
+		case CC_OP_XOR:
+			gen_op_xorl_T0_T1();
+			break;
+		case CC_OP_LSL:
+			gen_op_lsll_T0_T1();
+			break;
+		case CC_OP_LSR:
+			gen_op_lsrl_T0_T1();
+			break;
+		case CC_OP_ASR:
+			gen_op_asrl_T0_T1();
+			break;
+		case CC_OP_NEG:
+			gen_op_negl_T0_T1();
+			/* Extended arithmetics.  */
+			gen_op_subxl_T0_C();
+			break;
+		case CC_OP_LZ:
+			gen_op_lz_T0_T1();
+			break;
+		case CC_OP_BTST:
+			gen_op_btst_T0_T1();
+			writeback = 0;
+			break;
+		case CC_OP_MULS:
+			gen_op_muls_T0_T1();
+			break;
+		case CC_OP_MULU:
+			gen_op_mulu_T0_T1();
+			break;
+		case CC_OP_DSTEP:
+			gen_op_dstep_T0_T1();
+			break;
+		case CC_OP_BOUND:
+			gen_op_bound_T0_T1();
+			break;
+		case CC_OP_CMP:
+			gen_op_negl_T1_T1();
+			gen_op_addl_T0_T1();
+			/* CRIS flag evaluation needs ~src.  */
+			gen_op_negl_T1_T1();
+			gen_op_not_T1_T1();
+
+			/* Extended arithmetics.  */
+			gen_op_subxl_T0_C();
+			writeback = 0;
+			break;
+		default:
+			fprintf (logfile, "illegal ALU op.\n");
+			BUG();
+			break;
+	}
+
+	if (dc->update_cc)
+		gen_op_update_cc_src_T1();
+
+	if (size == 1)
+		gen_op_andl_T0_im(0xff);
+	else if (size == 2)
+		gen_op_andl_T0_im(0xffff);
+	/* Writeback.  */
+	if (writeback) {
+		if (size == 4)
+			gen_movl_reg_T0[rd]();
+		else {
+			gen_op_movl_T1_T0();
+			gen_movl_T0_reg[rd]();
+			if (size == 1)
+				gen_op_andl_T0_im(~0xff);
+			else
+				gen_op_andl_T0_im(~0xffff);
+			gen_op_orl_T0_T1();
+			gen_movl_reg_T0[rd]();
+			gen_op_movl_T0_T1();
+		}
+	}
+	if (dc->update_cc)
+		gen_op_update_cc_result_T0();
+
+	{
+		/* TODO: Optimize this.  */
+		if (!dc->flagx_live)
+			cris_evaluate_flags(dc);		
+	}
+}
+
+static int arith_cc(DisasContext *dc)
+{
+	if (dc->update_cc) {
+		switch (dc->cc_op) {
+			case CC_OP_ADD: return 1;
+			case CC_OP_SUB: return 1;
+			case CC_OP_LSL: return 1;
+			case CC_OP_LSR: return 1;
+			case CC_OP_ASR: return 1;
+			case CC_OP_CMP: return 1;
+			default: 
+				return 0;				
+		}
+	}
+	return 0;
+}
+
+static void gen_tst_cc (DisasContext *dc, int cond)
+{
+	int arith_opt;
+
+	/* TODO: optimize more condition codes.  */
+	arith_opt = arith_cc(dc) && !dc->flags_live;
+	switch (cond) {
+		case CC_EQ:
+			if (arith_opt)
+				gen_op_tst_cc_eq_fast ();
+			else {
+				cris_evaluate_flags(dc);
+				gen_op_tst_cc_eq ();
+			}
+			break;
+		case CC_NE:
+			if (arith_opt)
+				gen_op_tst_cc_ne_fast ();
+			else {
+				cris_evaluate_flags(dc);
+				gen_op_tst_cc_ne ();
+			}
+			break;
+		case CC_CS:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_cs ();
+			break;
+		case CC_CC:
+			cris_evaluate_flags(dc);			
+			gen_op_tst_cc_cc ();
+			break;
+		case CC_VS:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_vs ();
+			break;
+		case CC_VC:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_vc ();
+			break;
+		case CC_PL:
+			if (arith_opt)
+				gen_op_tst_cc_pl_fast ();
+			else {
+				cris_evaluate_flags(dc);
+				gen_op_tst_cc_pl ();
+			}
+			break;
+		case CC_MI:
+			if (arith_opt)
+				gen_op_tst_cc_mi_fast ();
+			else {
+				cris_evaluate_flags(dc);
+				gen_op_tst_cc_mi ();
+			}
+			break;
+		case CC_LS:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_ls ();
+			break;
+		case CC_HI:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_hi ();
+			break;
+		case CC_GE:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_ge ();
+			break;
+		case CC_LT:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_lt ();
+			break;
+		case CC_GT:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_gt ();
+			break;
+		case CC_LE:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_le ();
+			break;
+		case CC_P:
+			cris_evaluate_flags(dc);
+			gen_op_tst_cc_p ();
+			break;
+		case CC_A:
+			cris_evaluate_flags(dc);
+			gen_op_movl_T0_im (1);
+			break;
+		default:
+			BUG();
+			break;
+	};
+}
+
+static void cris_prepare_cc_branch (DisasContext *dc, int offset, int cond)
+{
+	/* This helps us re-schedule the micro-code to insns in delay-slots
+	   before the actual jump.  */
+	dc->delayed_branch = 2;
+	dc->delayed_pc = dc->pc + offset;
+	dc->bcc = cond;
+	if (cond != CC_A)
+	{
+		gen_tst_cc (dc, cond);
+		gen_op_evaluate_bcc ();		
+	}
+	gen_op_movl_T0_im (dc->delayed_pc);
+	gen_op_movl_btarget_T0 ();
+}
+
+/* Dynamic jumps, when the dest is in a live reg for example.  */
+void cris_prepare_dyn_jmp (DisasContext *dc)
+{
+	/* This helps us re-schedule the micro-code to insns in delay-slots
+	   before the actual jump.  */
+	dc->delayed_branch = 2;
+	dc->dyn_jmp = 1;
+	dc->bcc = CC_A;
+}
+
+void cris_prepare_jmp (DisasContext *dc, uint32_t dst)
+{
+	/* This helps us re-schedule the micro-code to insns in delay-slots
+	   before the actual jump.  */
+	dc->delayed_branch = 2;
+	dc->delayed_pc = dst;
+	dc->dyn_jmp = 0;
+	dc->bcc = CC_A;
+}
+
+void gen_load_T0_T0 (DisasContext *dc, unsigned int size, int sign)
+{
+	if (size == 1) {
+		if (sign)
+			gen_op_ldb_T0_T0(dc);
+		else
+			gen_op_ldub_T0_T0(dc);
+	}
+	else if (size == 2) {
+		if (sign)
+			gen_op_ldw_T0_T0(dc);
+		else
+			gen_op_lduw_T0_T0(dc);
+	}
+	else {
+		gen_op_ldl_T0_T0(dc);
+	}
+}
+
+void gen_store_T0_T1 (DisasContext *dc, unsigned int size)
+{
+	/* Remember, operands are flipped. CRIS has reversed order.  */
+	if (size == 1) {
+		gen_op_stb_T0_T1(dc);
+	}
+	else if (size == 2) {
+		gen_op_stw_T0_T1(dc);
+	}
+	else
+		gen_op_stl_T0_T1(dc);
+}
+
+/* sign extend T1 according to size.  */
+static void gen_sext_T1_T0(int size)
+{
+	if (size == 1)
+		gen_op_extb_T1_T0();
+	else if (size == 2)
+		gen_op_extw_T1_T0();
+}
+
+static void gen_sext_T1_T1(int size)
+{
+	if (size == 1)
+		gen_op_extb_T1_T1();
+	else if (size == 2)
+		gen_op_extw_T1_T1();
+}
+
+static void gen_sext_T0_T0(int size)
+{
+	if (size == 1)
+		gen_op_extb_T0_T0();
+	else if (size == 2)
+		gen_op_extw_T0_T0();
+}
+
+static void gen_zext_T0_T0(int size)
+{
+	if (size == 1)
+		gen_op_zextb_T0_T0();
+	else if (size == 2)
+		gen_op_zextw_T0_T0();
+}
+
+static void gen_zext_T1_T0(int size)
+{
+	if (size == 1)
+		gen_op_zextb_T1_T0();
+	else if (size == 2)
+		gen_op_zextw_T1_T0();
+}
+
+static void gen_zext_T1_T1(int size)
+{
+	if (size == 1)
+		gen_op_zextb_T1_T1();
+	else if (size == 2)
+		gen_op_zextw_T1_T1();
+}
+
+#if DISAS_CRIS
+static char memsize_char(int size)
+{
+	switch (size)
+	{
+		case 1: return 'b';  break;
+		case 2: return 'w';  break;
+		case 4: return 'd';  break;
+		default:
+			return 'x';
+			break;
+	}
+}
+#endif
+
+static unsigned int memsize_z(DisasContext *dc)
+{
+	return dc->zsize + 1;
+}
+
+static unsigned int memsize_zz(DisasContext *dc)
+{
+	switch (dc->zzsize)
+	{
+		case 0: return 1;
+		case 1: return 2;
+		default: 
+			return 4;
+	}
+}
+
+static void do_postinc (DisasContext *dc, int size)
+{
+	if (!dc->postinc)
+		return;
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_addl_T0_im(size);
+	gen_movl_reg_T0[dc->op1]();
+}
+
+
+static void dec_prep_move_r(DisasContext *dc, int rs, int rd, 
+			    int size, int s_ext)
+{
+	gen_movl_T0_reg[rs]();
+	gen_op_movl_T1_T0();
+	if (s_ext)
+		gen_sext_T1_T1(size);
+	else
+		gen_zext_T1_T1(size);	
+}
+
+/* Prepare T0 and T1 for a register alu operation.
+   s_ext decides if the operand1 should be sign-extended or zero-extended when
+   needed.  */
+static void dec_prep_alu_r(DisasContext *dc, int rs, int rd, 
+			  int size, int s_ext)
+{
+	dec_prep_move_r(dc, rs, rd, size, s_ext);
+
+	gen_movl_T0_reg[rd]();	       
+	if (s_ext)
+		gen_sext_T0_T0(size);
+	else
+		gen_zext_T0_T0(size);
+}
+
+/* Prepare T0 and T1 for a memory + alu operation.
+   s_ext decides if the operand1 should be sign-extended or zero-extended when
+   needed.  */
+static int dec_prep_alu_m(DisasContext *dc, int s_ext, int memsize)
+{
+	unsigned int rs, rd;
+	uint32_t imm;
+	int is_imm;
+	int insn_len = 2;
+
+	rs = dc->op1;
+	rd = dc->op2;
+	is_imm = rs == 15 && dc->postinc;
+
+	/* Load [$rs] onto T1.  */
+	if (is_imm) {
+		insn_len = 2 + memsize;
+		if (memsize == 1)
+			insn_len++;
+
+		imm = ldl_code(dc->pc + 2);
+		if (memsize != 4) {
+			if (s_ext) {
+				imm = sign_extend(imm, (memsize * 8) - 1);
+			} else {
+				if (memsize == 1)
+					imm &= 0xff;
+				else
+					imm &= 0xffff;
+			}
+		}
+		DIS(fprintf (logfile, "imm=%x rd=%d sext=%d ms=%d\n", 
+			    imm, rd, s_ext, memsize));
+		gen_op_movl_T1_im (imm);
+		dc->postinc = 0;
+	} else {
+		gen_movl_T0_reg[rs]();
+		gen_load_T0_T0(dc, memsize, 0);
+		gen_op_movl_T1_T0();
+		if (s_ext)
+			gen_sext_T1_T1(memsize);
+		else
+			gen_zext_T1_T1(memsize);
+	}
+
+	/* put dest in T0.  */
+	gen_movl_T0_reg[rd]();
+	return insn_len;
+}
+
+#if DISAS_CRIS
+static const char *cc_name(int cc)
+{
+	static char *cc_names[16] = {
+		"cc", "cs", "ne", "eq", "vc", "vs", "pl", "mi",
+		"ls", "hi", "ge", "lt", "gt", "le", "a", "p"
+	};
+	assert(cc < 16);
+	return cc_names[cc];
+}
+#endif
+
+static unsigned int dec_bccq(DisasContext *dc)
+{
+	int32_t offset;
+	int sign;
+	uint32_t cond = dc->op2;
+	int tmp;
+
+	offset = EXTRACT_FIELD (dc->ir, 1, 7);
+	sign = EXTRACT_FIELD(dc->ir, 0, 0);
+
+	offset *= 2;
+	offset |= sign << 8;
+	tmp = offset;
+	offset = sign_extend(offset, 8);
+
+	/* op2 holds the condition-code.  */
+	cris_cc_mask(dc, 0);
+	cris_prepare_cc_branch (dc, offset, cond);
+	return 2;
+}
+static unsigned int dec_addoq(DisasContext *dc)
+{
+	uint32_t imm;
+
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 7);
+	imm = sign_extend(dc->op1, 7);
+
+	DIS(fprintf (logfile, "addoq %d, $r%u\n", imm, dc->op2));
+	cris_cc_mask(dc, 0);
+	/* Fetch register operand,  */
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(imm);
+	crisv32_alu_op(dc, CC_OP_ADD, REG_ACR, 4);
+	return 2;
+}
+static unsigned int dec_addq(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "addq %u, $r%u\n", dc->op1, dc->op2));
+
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	/* Fetch register operand,  */
+	gen_movl_T0_reg[dc->op2]();	
+	gen_op_movl_T1_im(dc->op1);
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_moveq(DisasContext *dc)
+{
+	uint32_t imm;
+
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
+	imm = sign_extend(dc->op1, 5);
+	DIS(fprintf (logfile, "moveq %d, $r%u\n", imm, dc->op2));
+
+	cris_cc_mask(dc, 0);
+	gen_op_movl_T1_im(imm);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+
+	return 2;
+}
+static unsigned int dec_subq(DisasContext *dc)
+{
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
+
+	DIS(fprintf (logfile, "subq %u, $r%u\n", dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	/* Fetch register operand,  */
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(dc->op1);
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_cmpq(DisasContext *dc)
+{
+	uint32_t imm;
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
+	imm = sign_extend(dc->op1, 5);
+
+	DIS(fprintf (logfile, "cmpq %d, $r%d\n", imm, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(imm);
+	crisv32_alu_op(dc, CC_OP_CMP, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_andq(DisasContext *dc)
+{
+	uint32_t imm;
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
+	imm = sign_extend(dc->op1, 5);
+
+	DIS(fprintf (logfile, "andq %d, $r%d\n", imm, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(imm);
+	crisv32_alu_op(dc, CC_OP_AND, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_orq(DisasContext *dc)
+{
+	uint32_t imm;
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
+	imm = sign_extend(dc->op1, 5);
+	DIS(fprintf (logfile, "orq %d, $r%d\n", imm, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(imm);
+	crisv32_alu_op(dc, CC_OP_OR, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_btstq(DisasContext *dc)
+{
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
+	DIS(fprintf (logfile, "btstq %u, $r%d\n", dc->op1, dc->op2));
+	cris_evaluate_flags(dc);
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(dc->op1);
+	crisv32_alu_op(dc, CC_OP_BTST, dc->op2, 4);
+
+	cris_update_cc_op(dc, CC_OP_FLAGS);
+	gen_op_movl_flags_T0();
+	dc->flags_live = 1;
+	return 2;
+}
+static unsigned int dec_asrq(DisasContext *dc)
+{
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
+	DIS(fprintf (logfile, "asrq %u, $r%d\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(dc->op1);
+	crisv32_alu_op(dc, CC_OP_ASR, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_lslq(DisasContext *dc)
+{
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
+	DIS(fprintf (logfile, "lslq %u, $r%d\n", dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(dc->op1);
+	crisv32_alu_op(dc, CC_OP_LSL, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_lsrq(DisasContext *dc)
+{
+	dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
+	DIS(fprintf (logfile, "lsrq %u, $r%d\n", dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_im(dc->op1);
+	crisv32_alu_op(dc, CC_OP_LSR, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_move_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "move.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_move_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_scc_r(DisasContext *dc)
+{
+	int cond = dc->op2;
+
+	DIS(fprintf (logfile, "s%s $r%u\n", 
+		    cc_name(cond), dc->op1));
+
+	if (cond != CC_A)
+	{
+		gen_tst_cc (dc, cond);
+		gen_op_movl_T1_T0();
+	}
+	else
+		gen_op_movl_T1_im(1);
+
+	cris_cc_mask(dc, 0);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op1, 4);
+	return 2;
+}
+
+static unsigned int dec_and_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "and.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_AND, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_lz_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "lz $r%u, $r%u\n", 
+		    dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0);
+	crisv32_alu_op(dc, CC_OP_LZ, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_lsl_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "lsl.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);	
+	gen_op_andl_T1_im(63);	
+	crisv32_alu_op(dc, CC_OP_LSL, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_lsr_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "lsr.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	gen_op_andl_T1_im(63);
+	crisv32_alu_op(dc, CC_OP_LSR, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_asr_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "asr.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1);
+	gen_op_andl_T1_im(63);
+	crisv32_alu_op(dc, CC_OP_ASR, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_muls_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "muls.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZV);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1);
+	gen_sext_T0_T0(size);
+	crisv32_alu_op(dc, CC_OP_MULS, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_mulu_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "mulu.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZV);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	gen_zext_T0_T0(size);
+	crisv32_alu_op(dc, CC_OP_MULU, dc->op2, 4);
+	return 2;
+}
+
+
+static unsigned int dec_dstep_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "dstep $r%u, $r%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_movl_T1_T0();
+	gen_movl_T0_reg[dc->op2]();
+	crisv32_alu_op(dc, CC_OP_DSTEP, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_xor_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "xor.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	BUG_ON(size != 4); /* xor is dword.  */
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_XOR, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_bound_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "bound.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	/* TODO: needs optmimization.  */
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	/* rd should be 4.  */
+	gen_movl_T0_reg[dc->op2]();
+	crisv32_alu_op(dc, CC_OP_BOUND, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_cmp_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "cmp.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_CMP, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_abs_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "abs $r%u, $r%u\n", 
+		    dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_move_r(dc, dc->op1, dc->op2, 4, 0);	
+	gen_op_absl_T1_T1();
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_add_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "add.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_addc_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "addc $r%u, $r%u\n", 
+		    dc->op1, dc->op2));
+	cris_evaluate_flags(dc);
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0);
+	crisv32_alu_op(dc, CC_OP_ADDC, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_mcp_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "mcp $p%u, $r%u\n", 
+		     dc->op2, dc->op1));
+	cris_evaluate_flags(dc);
+	cris_cc_mask(dc, CC_MASK_RNZV);
+	gen_movl_T0_preg[dc->op2]();
+	gen_op_movl_T1_T0();
+	gen_movl_T0_reg[dc->op1]();
+	crisv32_alu_op(dc, CC_OP_MCP, dc->op1, 4);
+	return 2;
+}
+
+#if DISAS_CRIS
+static char * swapmode_name(int mode, char *modename) {
+	int i = 0;
+	if (mode & 8)
+		modename[i++] = 'n';
+	if (mode & 4)
+		modename[i++] = 'w';
+	if (mode & 2)
+		modename[i++] = 'b';
+	if (mode & 1)
+		modename[i++] = 'r';
+	modename[i++] = 0;
+	return modename;
+}
+#endif
+
+static unsigned int dec_swap_r(DisasContext *dc)
+{
+	DIS(char modename[4]);
+	DIS(fprintf (logfile, "swap%s $r%u\n", 
+		     swapmode_name(dc->op2, modename), dc->op1));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op1]();
+	if (dc->op2 & 8)
+		gen_op_not_T0_T0();
+	if (dc->op2 & 4)
+		gen_op_swapw_T0_T0();
+	if (dc->op2 & 2)
+		gen_op_swapb_T0_T0();
+	if (dc->op2 & 1)
+		gen_op_swapr_T0_T0();
+	gen_op_movl_T1_T0();
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op1, 4);
+	return 2;
+}
+
+static unsigned int dec_or_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "or.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_OR, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_addi_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "addi.%c $r%u, $r%u\n", 
+		    memsize_char(memsize_zz(dc)), dc->op2, dc->op1));
+	cris_cc_mask(dc, 0);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0);
+	gen_op_lsll_T0_im(dc->zzsize);
+	gen_op_addl_T0_T1();
+	gen_movl_reg_T0[dc->op1]();
+	return 2;
+}
+
+static unsigned int dec_addi_acr(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "addi.%c $r%u, $r%u, $acr\n", 
+		    memsize_char(memsize_zz(dc)), dc->op2, dc->op1));
+	cris_cc_mask(dc, 0);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0);
+	gen_op_lsll_T0_im(dc->zzsize);
+	gen_op_addl_T0_T1();
+	gen_movl_reg_T0[REG_ACR]();
+	return 2;
+}
+
+static unsigned int dec_neg_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "neg.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_NEG, dc->op2, size);
+	return 2;
+}
+
+static unsigned int dec_btst_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "btst $r%u, $r%u\n", 
+		    dc->op1, dc->op2));
+	cris_evaluate_flags(dc);
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0);
+	crisv32_alu_op(dc, CC_OP_BTST, dc->op2, 4);
+
+	cris_update_cc_op(dc, CC_OP_FLAGS);
+	gen_op_movl_flags_T0();
+	dc->flags_live = 1;
+	return 2;
+}
+
+static unsigned int dec_sub_r(DisasContext *dc)
+{
+	int size = memsize_zz(dc);
+	DIS(fprintf (logfile, "sub.%c $r%u, $r%u\n", 
+		    memsize_char(size), dc->op1, dc->op2));
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, size);
+	return 2;
+}
+
+/* Zero extension. From size to dword.  */
+static unsigned int dec_movu_r(DisasContext *dc)
+{
+	int size = memsize_z(dc);
+	DIS(fprintf (logfile, "movu.%c $r%u, $r%u\n", 
+		    memsize_char(size),
+		    dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	dec_prep_move_r(dc, dc->op1, dc->op2, size, 0);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	return 2;
+}
+
+/* Sign extension. From size to dword.  */
+static unsigned int dec_movs_r(DisasContext *dc)
+{
+	int size = memsize_z(dc);
+	DIS(fprintf (logfile, "movs.%c $r%u, $r%u\n", 
+		    memsize_char(size),
+		    dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_movl_T0_reg[dc->op1]();
+	/* Size can only be qi or hi.  */
+	gen_sext_T1_T0(size);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	return 2;
+}
+
+/* zero extension. From size to dword.  */
+static unsigned int dec_addu_r(DisasContext *dc)
+{
+	int size = memsize_z(dc);
+	DIS(fprintf (logfile, "addu.%c $r%u, $r%u\n", 
+		    memsize_char(size),
+		    dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	gen_movl_T0_reg[dc->op1]();
+	/* Size can only be qi or hi.  */
+	gen_zext_T1_T0(size);
+	gen_movl_T0_reg[dc->op2]();
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, 4);
+	return 2;
+}
+/* Sign extension. From size to dword.  */
+static unsigned int dec_adds_r(DisasContext *dc)
+{
+	int size = memsize_z(dc);
+	DIS(fprintf (logfile, "adds.%c $r%u, $r%u\n", 
+		    memsize_char(size),
+		    dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	gen_movl_T0_reg[dc->op1]();
+	/* Size can only be qi or hi.  */
+	gen_sext_T1_T0(size);
+	gen_movl_T0_reg[dc->op2]();
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, 4);
+	return 2;
+}
+
+/* Zero extension. From size to dword.  */
+static unsigned int dec_subu_r(DisasContext *dc)
+{
+	int size = memsize_z(dc);
+	DIS(fprintf (logfile, "subu.%c $r%u, $r%u\n", 
+		    memsize_char(size),
+		    dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	gen_movl_T0_reg[dc->op1]();
+	/* Size can only be qi or hi.  */
+	gen_zext_T1_T0(size);
+	gen_movl_T0_reg[dc->op2]();
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, 4);
+	return 2;
+}
+
+/* Sign extension. From size to dword.  */
+static unsigned int dec_subs_r(DisasContext *dc)
+{
+	int size = memsize_z(dc);
+	DIS(fprintf (logfile, "subs.%c $r%u, $r%u\n", 
+		    memsize_char(size),
+		    dc->op1, dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	gen_movl_T0_reg[dc->op1]();
+	/* Size can only be qi or hi.  */
+	gen_sext_T1_T0(size);
+	gen_movl_T0_reg[dc->op2]();
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_setclrf(DisasContext *dc)
+{
+	uint32_t flags;
+	int set = (~dc->opcode >> 2) & 1;
+
+	flags = (EXTRACT_FIELD(dc->ir, 12, 15) << 4)
+		| EXTRACT_FIELD(dc->ir, 0, 3);
+	DIS(fprintf (logfile, "set=%d flags=%x\n", set, flags));
+	if (set && flags == 0)
+		DIS(fprintf (logfile, "nop\n"));
+	else if (!set && (flags & 0x20))
+		DIS(fprintf (logfile, "di\n"));
+	else
+		DIS(fprintf (logfile, "%sf %x\n", 
+			    set ? "set" : "clr",
+			    flags));
+
+	if (set && (flags & X_FLAG)) {
+		dc->flagx_live = 1;
+		dc->flags_x = 1;
+	}
+
+	/* Simply decode the flags.  */
+	cris_evaluate_flags (dc);
+	cris_update_cc_op(dc, CC_OP_FLAGS);
+	if (set)
+		gen_op_setf (flags);
+	else
+		gen_op_clrf (flags);
+	dc->flags_live = 1;
+	return 2;
+}
+
+static unsigned int dec_move_rs(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "move $r%u, $s%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, 0);
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_movl_sreg_T0(dc->op2);
+
+	if (dc->op2 == 5) /* srs is checked at runtime.  */
+		gen_op_movl_tlb_lo_T0();
+	return 2;
+}
+static unsigned int dec_move_sr(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "move $s%u, $r%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, 0);
+	gen_op_movl_T0_sreg(dc->op1);
+	gen_op_movl_T1_T0();
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	return 2;
+}
+static unsigned int dec_move_rp(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "move $r%u, $p%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, 0);
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_movl_T1_T0();
+	gen_movl_preg_T0[dc->op2]();
+	return 2;
+}
+static unsigned int dec_move_pr(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "move $p%u, $r%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, 0);
+	gen_movl_T0_preg[dc->op2]();
+	gen_op_movl_T1_T0();
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op1, preg_sizes[dc->op2]);
+	return 2;
+}
+
+static unsigned int dec_move_mr(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "move.%c [$r%u%s, $r%u\n",
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, memsize);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_movs_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "movs.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	/* sign extend.  */
+	cris_cc_mask(dc, CC_MASK_NZ);
+	insn_len = dec_prep_alu_m(dc, 1, memsize);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_addu_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "addu.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	/* sign extend.  */
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_adds_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "adds.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	/* sign extend.  */
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 1, memsize);
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_subu_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "subu.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	/* sign extend.  */
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_subs_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "subs.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	/* sign extend.  */
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 1, memsize);
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_movu_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+
+	DIS(fprintf (logfile, "movu.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_cmpu_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "cmpu.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_CMP, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_cmps_m(DisasContext *dc)
+{
+	int memsize = memsize_z(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "cmps.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 1, memsize);
+	crisv32_alu_op(dc, CC_OP_CMP, dc->op2, memsize_zz(dc));
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_cmp_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "cmp.%c [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_CMP, dc->op2, memsize_zz(dc));
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_test_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "test.%d [$r%u%s] op2=%x\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	gen_op_clrf(3);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	gen_op_swp_T0_T1();
+	gen_op_movl_T1_im(0);
+	crisv32_alu_op(dc, CC_OP_CMP, dc->op2, memsize_zz(dc));
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_and_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "and.%d [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_AND, dc->op2, memsize_zz(dc));
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_add_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "add.%d [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_ADD, dc->op2, memsize_zz(dc));
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_addo_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "add.%d [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, 0);
+	insn_len = dec_prep_alu_m(dc, 1, memsize);
+	crisv32_alu_op(dc, CC_OP_ADD, REG_ACR, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_bound_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "bound.%d [$r%u%s, $r%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_BOUND, dc->op2, 4);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_addc_mr(DisasContext *dc)
+{
+	int insn_len = 2;
+	DIS(fprintf (logfile, "addc [$r%u%s, $r%u\n", 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2));
+
+	cris_evaluate_flags(dc);
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, 4);
+	crisv32_alu_op(dc, CC_OP_ADDC, dc->op2, 4);
+	do_postinc(dc, 4);
+	return insn_len;
+}
+
+static unsigned int dec_sub_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "sub.%c [$r%u%s, $r%u ir=%x zz=%x\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2, dc->ir, dc->zzsize));
+
+	cris_cc_mask(dc, CC_MASK_NZVC);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_SUB, dc->op2, memsize);
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_or_m(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len;
+	DIS(fprintf (logfile, "or.%d [$r%u%s, $r%u pc=%x\n", 
+		    memsize_char(memsize), 
+		    dc->op1, dc->postinc ? "+]" : "]",
+		    dc->op2, dc->pc));
+
+	cris_cc_mask(dc, CC_MASK_NZ);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	crisv32_alu_op(dc, CC_OP_OR, dc->op2, memsize_zz(dc));
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_move_mp(DisasContext *dc)
+{
+	int memsize = memsize_zz(dc);
+	int insn_len = 2;
+
+	DIS(fprintf (logfile, "move.%c [$r%u%s, $p%u\n", 
+		    memsize_char(memsize), 
+		    dc->op1, 
+		    dc->postinc ? "+]" : "]",
+		    dc->op2));
+	
+	cris_cc_mask(dc, 0);
+	insn_len = dec_prep_alu_m(dc, 0, memsize);
+	gen_op_movl_T0_T1();
+	gen_movl_preg_T0[dc->op2]();
+
+	do_postinc(dc, memsize);
+	return insn_len;
+}
+
+static unsigned int dec_move_pm(DisasContext *dc)
+{
+	int memsize;
+
+	memsize = preg_sizes[dc->op2];
+
+	DIS(fprintf (logfile, "move.%d $p%u, [$r%u%s\n", 
+		     memsize, dc->op2, dc->op1, dc->postinc ? "+]" : "]"));
+	
+	cris_cc_mask(dc, 0);
+	/* prepare store.  */
+	gen_movl_T0_preg[dc->op2]();
+	gen_op_movl_T1_T0();
+	gen_movl_T0_reg[dc->op1]();
+	gen_store_T0_T1(dc, memsize);
+	if (dc->postinc)
+	{
+		gen_op_addl_T0_im(memsize);
+		gen_movl_reg_T0[dc->op1]();
+	}
+	return 2;
+}
+
+static unsigned int dec_movem_mr(DisasContext *dc)
+{
+	int i;
+
+	DIS(fprintf (logfile, "movem [$r%u%s, $r%u\n", dc->op1,
+		    dc->postinc ? "+]" : "]", dc->op2));
+	
+	cris_cc_mask(dc, 0);
+	/* fetch the address into T1.  */
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_movl_T1_T0();
+	for (i = 0; i <= dc->op2; i++) {
+		/* Perform the load onto regnum i. Always dword wide.  */
+		gen_load_T0_T0(dc, 4, 0);
+		gen_movl_reg_T0[i]();
+		/* Update the address.  */
+		gen_op_addl_T1_im(4);
+		gen_op_movl_T0_T1();
+	}
+	if (dc->postinc) {
+		/* writeback the updated pointer value.  */		
+		gen_movl_reg_T0[dc->op1]();
+	}
+	return 2;
+}
+
+static unsigned int dec_movem_rm(DisasContext *dc)
+{
+	int i;
+
+	DIS(fprintf (logfile, "movem $r%u, [$r%u%s\n", dc->op2, dc->op1,
+		     dc->postinc ? "+]" : "]"));
+	
+	cris_cc_mask(dc, 0);
+	for (i = 0; i <= dc->op2; i++) {
+		/* Fetch register i into T1.  */
+		gen_movl_T0_reg[i]();
+		gen_op_movl_T1_T0();
+
+		/* Fetch the address into T0.  */
+		gen_movl_T0_reg[dc->op1]();
+		/* Displace it.  */
+		gen_op_addl_T0_im(i * 4);
+
+		/* Perform the store.  */
+		gen_store_T0_T1(dc, 4);
+	}
+	if (dc->postinc) {
+		/* Update the address.  */
+		gen_op_addl_T0_im(4);
+		/* writeback the updated pointer value.  */
+		gen_movl_reg_T0[dc->op1]();
+	}
+	return 2;
+}
+
+static unsigned int dec_move_rm(DisasContext *dc)
+{
+	int memsize;
+
+	memsize = memsize_zz(dc);
+
+	DIS(fprintf (logfile, "move.%d $r%u, [$r%u]\n", 
+		     memsize, dc->op2, dc->op1));
+	
+	cris_cc_mask(dc, 0);
+	/* prepare store.  */
+	gen_movl_T0_reg[dc->op2]();
+	gen_op_movl_T1_T0();
+	gen_movl_T0_reg[dc->op1]();
+	gen_store_T0_T1(dc, memsize);
+	if (dc->postinc)
+	{
+		gen_op_addl_T0_im(memsize);
+		gen_movl_reg_T0[dc->op1]();
+	}
+	return 2;
+}
+
+
+static unsigned int dec_lapcq(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "lapcq %x, $r%u\n", 
+		    dc->pc + dc->op1*2, dc->op2));
+	cris_cc_mask(dc, 0);
+	gen_op_movl_T1_im(dc->pc + dc->op1*2);
+	crisv32_alu_op(dc, CC_OP_MOVE, dc->op2, 4);
+	return 2;
+}
+
+static unsigned int dec_lapc_im(DisasContext *dc)
+{
+	unsigned int rd;
+	int32_t imm;
+	int insn_len = 6;
+
+	rd = dc->op2;
+
+	cris_cc_mask(dc, 0);
+	imm = ldl_code(dc->pc + 2);
+	DIS(fprintf (logfile, "lapc 0x%x, $r%u\n", imm + dc->pc, dc->op2));
+	gen_op_movl_T0_im (dc->pc + imm);
+	gen_movl_reg_T0[rd] ();
+	return insn_len;
+}
+
+/* Jump to special reg.  */
+static unsigned int dec_jump_p(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "jump $p%u\n", dc->op2));
+	cris_cc_mask(dc, 0);
+	/* Store the return address in Pd.  */
+	gen_movl_T0_preg[dc->op2]();
+	gen_op_movl_btarget_T0();
+	cris_prepare_dyn_jmp(dc);
+	return 2;
+}
+
+/* Jump and save.  */
+static unsigned int dec_jas_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "jas $r%u, $p%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, 0);
+	/* Stor the return address in Pd.  */
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_movl_btarget_T0();
+	gen_op_movl_T0_im(dc->pc + 4);
+	gen_movl_preg_T0[dc->op2]();
+	cris_prepare_dyn_jmp(dc);
+	return 2;
+}
+
+static unsigned int dec_jas_im(DisasContext *dc)
+{
+	uint32_t imm;
+
+	imm = ldl_code(dc->pc + 2);
+
+	DIS(fprintf (logfile, "jas 0x%x\n", imm));
+	cris_cc_mask(dc, 0);
+	/* Stor the return address in Pd.  */
+	gen_op_movl_T0_im(imm);
+	gen_op_movl_btarget_T0();
+	gen_op_movl_T0_im(dc->pc + 8);
+	gen_movl_preg_T0[dc->op2]();
+	cris_prepare_dyn_jmp(dc);
+	return 6;
+}
+
+static unsigned int dec_jasc_im(DisasContext *dc)
+{
+	uint32_t imm;
+
+	imm = ldl_code(dc->pc + 2);
+
+	DIS(fprintf (logfile, "jasc 0x%x\n", imm));
+	cris_cc_mask(dc, 0);
+	/* Stor the return address in Pd.  */
+	gen_op_movl_T0_im(imm);
+	gen_op_movl_btarget_T0();
+	gen_op_movl_T0_im(dc->pc + 8 + 4);
+	gen_movl_preg_T0[dc->op2]();
+	cris_prepare_dyn_jmp(dc);
+	return 6;
+}
+
+static unsigned int dec_jasc_r(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "jasc_r $r%u, $p%u\n", dc->op1, dc->op2));
+	cris_cc_mask(dc, 0);
+	/* Stor the return address in Pd.  */
+	gen_movl_T0_reg[dc->op1]();
+	gen_op_movl_btarget_T0();
+	gen_op_movl_T0_im(dc->pc + 4 + 4);
+	gen_movl_preg_T0[dc->op2]();
+	cris_prepare_dyn_jmp(dc);
+	return 2;
+}
+
+static unsigned int dec_bcc_im(DisasContext *dc)
+{
+	int32_t offset;
+	uint32_t cond = dc->op2;
+
+	offset = ldl_code(dc->pc + 2);
+	offset = sign_extend(offset, 15);
+
+	DIS(fprintf (logfile, "b%s %d pc=%x dst=%x\n", 
+		    cc_name(cond), offset, 
+		    dc->pc, dc->pc + offset));
+
+	cris_cc_mask(dc, 0);
+	/* op2 holds the condition-code.  */
+	cris_prepare_cc_branch (dc, offset, cond);
+	return 4;
+}
+
+static unsigned int dec_bas_im(DisasContext *dc)
+{
+	int32_t simm;
+
+
+	simm = ldl_code(dc->pc + 2);
+
+	DIS(fprintf (logfile, "bas 0x%x, $p%u\n", dc->pc + simm, dc->op2));
+	cris_cc_mask(dc, 0);
+	/* Stor the return address in Pd.  */
+	gen_op_movl_T0_im(dc->pc + simm);
+	gen_op_movl_btarget_T0();
+	gen_op_movl_T0_im(dc->pc + 8);
+	gen_movl_preg_T0[dc->op2]();
+	cris_prepare_dyn_jmp(dc);
+	return 6;
+}
+
+static unsigned int dec_basc_im(DisasContext *dc)
+{
+	int32_t simm;
+	simm = ldl_code(dc->pc + 2);
+
+	DIS(fprintf (logfile, "basc 0x%x, $p%u\n", dc->pc + simm, dc->op2));
+	cris_cc_mask(dc, 0);
+	/* Stor the return address in Pd.  */
+	gen_op_movl_T0_im(dc->pc + simm);
+	gen_op_movl_btarget_T0();
+	gen_op_movl_T0_im(dc->pc + 12);
+	gen_movl_preg_T0[dc->op2]();
+	cris_prepare_dyn_jmp(dc);
+	return 6;
+}
+
+static unsigned int dec_rfe_etc(DisasContext *dc)
+{
+	DIS(fprintf (logfile, "rfe_etc opc=%x pc=0x%x op1=%d op2=%d\n", 
+		    dc->opcode, dc->pc, dc->op1, dc->op2));
+
+	cris_cc_mask(dc, 0);
+
+	if (dc->op2 == 15) /* ignore halt.  */
+		goto done;
+
+	switch (dc->op2 & 7) {
+		case 2:
+			/* rfe.  */
+			cris_evaluate_flags(dc);
+			gen_op_ccs_rshift();
+			break;
+		case 5:
+			/* rfn.  */
+			BUG();
+			break;
+		case 6:
+			/* break.  */
+			gen_op_movl_T0_im(dc->pc);
+			gen_op_movl_pc_T0();
+			/* Breaks start at 16 in the exception vector.  */
+			gen_op_break_im(dc->op1 + 16);
+			break;
+		default:
+			printf ("op2=%x\n", dc->op2);
+			BUG();
+			break;
+		
+	}
+  done:
+	return 2;
+}
+
+static unsigned int dec_null(DisasContext *dc)
+{
+	printf ("unknown insn pc=%x opc=%x op1=%x op2=%x\n", 
+		dc->pc, dc->opcode, dc->op1, dc->op2);
+	fflush(NULL);
+	BUG();
+	return 2;
+}
+
+struct decoder_info {
+	struct {
+		uint32_t bits;
+		uint32_t mask;
+	};
+	unsigned int (*dec)(DisasContext *dc);
+} decinfo[] = {
+	/* Order matters here.  */
+	{DEC_MOVEQ, dec_moveq},
+	{DEC_BTSTQ, dec_btstq},
+	{DEC_CMPQ, dec_cmpq},
+	{DEC_ADDOQ, dec_addoq},
+	{DEC_ADDQ, dec_addq},
+	{DEC_SUBQ, dec_subq},
+	{DEC_ANDQ, dec_andq},
+	{DEC_ORQ, dec_orq},
+	{DEC_ASRQ, dec_asrq},
+	{DEC_LSLQ, dec_lslq},
+	{DEC_LSRQ, dec_lsrq},
+	{DEC_BCCQ, dec_bccq},
+
+	{DEC_BCC_IM, dec_bcc_im},
+	{DEC_JAS_IM, dec_jas_im},
+	{DEC_JAS_R, dec_jas_r},
+	{DEC_JASC_IM, dec_jasc_im},
+	{DEC_JASC_R, dec_jasc_r},
+	{DEC_BAS_IM, dec_bas_im},
+	{DEC_BASC_IM, dec_basc_im},
+	{DEC_JUMP_P, dec_jump_p},
+	{DEC_LAPC_IM, dec_lapc_im},
+	{DEC_LAPCQ, dec_lapcq},
+
+	{DEC_RFE_ETC, dec_rfe_etc},
+	{DEC_ADDC_MR, dec_addc_mr},
+
+	{DEC_MOVE_MP, dec_move_mp},
+	{DEC_MOVE_PM, dec_move_pm},
+	{DEC_MOVEM_MR, dec_movem_mr},
+	{DEC_MOVEM_RM, dec_movem_rm},
+	{DEC_MOVE_PR, dec_move_pr},
+	{DEC_SCC_R, dec_scc_r},
+	{DEC_SETF, dec_setclrf},
+	{DEC_CLEARF, dec_setclrf},
+
+	{DEC_MOVE_SR, dec_move_sr},
+	{DEC_MOVE_RP, dec_move_rp},
+	{DEC_SWAP_R, dec_swap_r},
+	{DEC_ABS_R, dec_abs_r},
+	{DEC_LZ_R, dec_lz_r},
+	{DEC_MOVE_RS, dec_move_rs},
+	{DEC_BTST_R, dec_btst_r},
+	{DEC_ADDC_R, dec_addc_r},
+
+	{DEC_DSTEP_R, dec_dstep_r},
+	{DEC_XOR_R, dec_xor_r},
+	{DEC_MCP_R, dec_mcp_r},
+	{DEC_CMP_R, dec_cmp_r},
+
+	{DEC_ADDI_R, dec_addi_r},
+	{DEC_ADDI_ACR, dec_addi_acr},
+
+	{DEC_ADD_R, dec_add_r},
+	{DEC_SUB_R, dec_sub_r},
+
+	{DEC_ADDU_R, dec_addu_r},
+	{DEC_ADDS_R, dec_adds_r},
+	{DEC_SUBU_R, dec_subu_r},
+	{DEC_SUBS_R, dec_subs_r},
+	{DEC_LSL_R, dec_lsl_r},
+
+	{DEC_AND_R, dec_and_r},
+	{DEC_OR_R, dec_or_r},
+	{DEC_BOUND_R, dec_bound_r},
+	{DEC_ASR_R, dec_asr_r},
+	{DEC_LSR_R, dec_lsr_r},
+
+	{DEC_MOVU_R, dec_movu_r},
+	{DEC_MOVS_R, dec_movs_r},
+	{DEC_NEG_R, dec_neg_r},
+	{DEC_MOVE_R, dec_move_r},
+
+	/* ftag_fidx_i_m.  */
+	/* ftag_fidx_d_m.  */
+
+	{DEC_MULS_R, dec_muls_r},
+	{DEC_MULU_R, dec_mulu_r},
+
+	{DEC_ADDU_M, dec_addu_m},
+	{DEC_ADDS_M, dec_adds_m},
+	{DEC_SUBU_M, dec_subu_m},
+	{DEC_SUBS_M, dec_subs_m},
+
+	{DEC_CMPU_M, dec_cmpu_m},
+	{DEC_CMPS_M, dec_cmps_m},
+	{DEC_MOVU_M, dec_movu_m},
+	{DEC_MOVS_M, dec_movs_m},
+	
+	{DEC_CMP_M, dec_cmp_m},
+	{DEC_ADDO_M, dec_addo_m},
+	{DEC_BOUND_M, dec_bound_m},
+	{DEC_ADD_M, dec_add_m},
+	{DEC_SUB_M, dec_sub_m},
+	{DEC_AND_M, dec_and_m},
+	{DEC_OR_M, dec_or_m},
+	{DEC_MOVE_RM, dec_move_rm},
+	{DEC_TEST_M, dec_test_m},
+	{DEC_MOVE_MR, dec_move_mr},
+
+	{{0, 0}, dec_null}
+};
+
+static inline unsigned int
+cris_decoder(DisasContext *dc)
+{
+	unsigned int insn_len = 2;
+	uint32_t tmp;
+	int i;
+
+	/* Load a halfword onto the instruction register.  */
+	tmp = ldl_code(dc->pc);
+	dc->ir = tmp & 0xffff;
+
+	/* Now decode it.  */
+	dc->opcode   = EXTRACT_FIELD(dc->ir, 4, 11);
+	dc->op1      = EXTRACT_FIELD(dc->ir, 0, 3);
+	dc->op2      = EXTRACT_FIELD(dc->ir, 12, 15);
+	dc->zsize    = EXTRACT_FIELD(dc->ir, 4, 4);
+	dc->zzsize   = EXTRACT_FIELD(dc->ir, 4, 5);
+	dc->postinc  = EXTRACT_FIELD(dc->ir, 10, 10);
+
+	/* Large switch for all insns.  */
+	for (i = 0; i < sizeof decinfo / sizeof decinfo[0]; i++) {
+		if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits)
+		{
+			insn_len = decinfo[i].dec(dc);
+			break;
+		}
+	}
+	
+	return insn_len;
+}
+
+static void check_breakpoint(CPUState *env, DisasContext *dc) 
+{
+	int j;
+	if (env->nb_breakpoints > 0) {
+		for(j = 0; j < env->nb_breakpoints; j++) {
+			if (env->breakpoints[j] == dc->pc) {
+				cris_evaluate_flags (dc);
+				gen_op_movl_T0_im((long)dc->pc);
+				gen_op_movl_pc_T0();
+				gen_op_debug();
+				dc->is_jmp = DISAS_UPDATE;
+			}
+		}
+	}
+}
+
+
+/* generate intermediate code for basic block 'tb'.  */
+struct DisasContext ctx;
+static int
+gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
+                               int search_pc)
+{
+	uint16_t *gen_opc_end;
+   	uint32_t pc_start;
+	unsigned int insn_len;
+	int j, lj;
+	struct DisasContext *dc = &ctx;
+	uint32_t next_page_start;
+
+	pc_start = tb->pc;
+	dc->env = env;
+	dc->tb = tb;
+
+	gen_opc_ptr = gen_opc_buf;
+	gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
+	gen_opparam_ptr = gen_opparam_buf;
+
+	dc->is_jmp = DISAS_NEXT;
+	dc->pc = pc_start;
+	dc->singlestep_enabled = env->singlestep_enabled;
+	dc->flagx_live = 0;
+	dc->flags_x = 0;
+	next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
+	lj = -1;
+	do
+	{
+		check_breakpoint(env, dc);
+		if (dc->is_jmp == DISAS_JUMP)
+			goto done;
+
+		if (search_pc) {
+			j = gen_opc_ptr - gen_opc_buf;
+			if (lj < j) {
+				lj++;
+				while (lj < j)
+					gen_opc_instr_start[lj++] = 0;
+			}
+			gen_opc_pc[lj] = dc->pc;
+			gen_opc_instr_start[lj] = 1;
+		}
+
+		insn_len = cris_decoder(dc);
+		STATS(gen_op_exec_insn());
+		dc->pc += insn_len;
+		if (!dc->flagx_live
+		    || (dc->flagx_live && 
+			!(dc->cc_op == CC_OP_FLAGS && dc->flags_x))) {
+			gen_movl_T0_preg[SR_CCS]();
+			gen_op_andl_T0_im(~X_FLAG);
+			gen_movl_preg_T0[SR_CCS]();
+			dc->flagx_live = 1;
+			dc->flags_x = 0;
+		}
+		
+		/* Check for delayed branches here. If we do it before 
+		   actually genereating any host code, the simulator will just
+		   loop doing nothing for on this program location.  */
+		if (dc->delayed_branch) {
+			dc->delayed_branch--;
+			if (dc->delayed_branch == 0)
+			{
+				if (dc->bcc == CC_A) {
+					gen_op_jmp ();
+					dc->is_jmp = DISAS_UPDATE;
+				}
+				else {
+					/* Conditional jmp.  */
+					gen_op_cc_jmp (dc->delayed_pc, dc->pc);
+					dc->is_jmp = DISAS_UPDATE;
+				}
+			}
+		}
+
+		if (env->singlestep_enabled)
+			break;
+	} while (!dc->is_jmp && gen_opc_ptr < gen_opc_end 
+		 && dc->pc < next_page_start);
+
+	if (!dc->is_jmp) {
+		gen_op_movl_T0_im((long)dc->pc);
+		gen_op_movl_pc_T0();
+	}
+
+	cris_evaluate_flags (dc);
+  done:
+	if (__builtin_expect(env->singlestep_enabled, 0)) {		
+		gen_op_debug();
+	} else {
+		switch(dc->is_jmp) {
+			case DISAS_NEXT:
+				gen_goto_tb(dc, 1, dc->pc);
+				break;
+			default:
+			case DISAS_JUMP:
+			case DISAS_UPDATE:
+				/* indicate that the hash table must be used
+				   to find the next TB */
+				/* T0 is used to index the jmp tables.  */
+				gen_op_movl_T0_0();
+				gen_op_exit_tb();
+				break;
+			case DISAS_TB_JUMP:
+				/* nothing more to generate */
+				break;
+		}
+	}
+	*gen_opc_ptr = INDEX_op_end;
+	if (search_pc) {
+		j = gen_opc_ptr - gen_opc_buf;
+		lj++;
+		while (lj <= j)
+			gen_opc_instr_start[lj++] = 0;
+	} else {
+		tb->size = dc->pc - pc_start;
+	}
+
+#ifdef DEBUG_DISAS
+	if (loglevel & CPU_LOG_TB_IN_ASM) {
+		fprintf(logfile, "--------------\n");
+		fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
+		target_disas(logfile, pc_start, dc->pc + 4 - pc_start, 0);
+		fprintf(logfile, "\n");
+		if (loglevel & CPU_LOG_TB_OP) {
+			fprintf(logfile, "OP:\n");
+			dump_ops(gen_opc_buf, gen_opparam_buf);
+			fprintf(logfile, "\n");
+		}
+	}
+#endif
+	return 0;
+}
+
+int gen_intermediate_code (CPUState *env, struct TranslationBlock *tb)
+{
+    return gen_intermediate_code_internal(env, tb, 0);
+}
+
+int gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb)
+{
+    return gen_intermediate_code_internal(env, tb, 1);
+}
+
+void cpu_dump_state (CPUState *env, FILE *f, 
+                     int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
+                     int flags)
+{
+	int i;
+	uint32_t srs;
+
+	if (!env || !f)
+		return;
+	
+	cpu_fprintf(f, "PC=%x CCS=%x btaken=%d btarget=%x\n"
+		    "cc_op=%d cc_src=%d cc_dest=%d cc_result=%x cc_mask=%x\n"
+		    "debug=%x %x %x\n",
+		    env->pc, env->pregs[SR_CCS], env->btaken, env->btarget, 
+		    env->cc_op, 
+		    env->cc_src, env->cc_dest, env->cc_result, env->cc_mask,
+		    env->debug1, env->debug2, env->debug3);
+
+	for (i = 0; i < 16; i++) {
+		cpu_fprintf(f, "r%2.2d=%8.8x ", i, env->regs[i]);
+		if ((i + 1) % 4 == 0)
+			cpu_fprintf(f, "\n");
+	}
+	cpu_fprintf(f, "\nspecial regs:\n");
+	for (i = 0; i < 16; i++) {
+		cpu_fprintf(f, "p%2.2d=%8.8x ", i, env->pregs[i]);
+		if ((i + 1) % 4 == 0)
+			cpu_fprintf(f, "\n");
+	}
+	srs = env->pregs[SR_SRS];
+	cpu_fprintf(f, "\nsupport function regs bank %d:\n", srs);
+	if (srs < 256) {
+		for (i = 0; i < 16; i++) {
+			cpu_fprintf(f, "s%2.2d=%8.8x ", 
+				    i, env->sregs[srs][i]);
+			if ((i + 1) % 4 == 0)
+				cpu_fprintf(f, "\n");
+		}
+	}
+	cpu_fprintf(f, "\n\n");
+
+}
+
+CPUCRISState *cpu_cris_init (void)
+{
+	CPUCRISState *env;
+
+	env = qemu_mallocz(sizeof(CPUCRISState));
+	if (!env)
+		return NULL;
+	cpu_exec_init(env);
+	cpu_reset(env);
+	return env;
+}
+
+void cpu_reset (CPUCRISState *env)
+{
+	memset(env, 0, offsetof(CPUCRISState, breakpoints));
+	tlb_flush(env, 1);
+}