ColdFire target.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2196 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 2759 insertions, 0 deletions

diff --git a/target-m68k/translate.c b/target-m68k/translate.c
new file mode 100644
index 0000000000..10728f97d3
--- /dev/null
+++ b/target-m68k/translate.c
@@ -0,0 +1,2759 @@
+/*
+ *  m68k translation
+ * 
+ *  Copyright (c) 2005-2006 CodeSourcery
+ *  Written by Paul Brook
+ *
+ * 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
+ * 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
+ */
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "config.h"
+#include "cpu.h"
+#include "exec-all.h"
+#include "disas.h"
+#include "m68k-qreg.h"
+
+static inline void qemu_assert(int cond, const char *msg)
+{
+    if (!cond) {
+        fprintf (stderr, "badness: %s\n", msg);
+        abort();
+    }
+}
+
+/* internal defines */
+typedef struct DisasContext {
+    target_ulong pc;
+    int is_jmp;
+    int cc_op;
+    uint32_t fpcr;
+    struct TranslationBlock *tb;
+    int singlestep_enabled;
+} DisasContext;
+
+#define DISAS_JUMP_NEXT 4
+
+/* XXX: move that elsewhere */
+/* ??? Fix exceptions.  */
+static void *gen_throws_exception;
+#define gen_last_qop NULL
+
+static uint16_t *gen_opc_ptr;
+static uint32_t *gen_opparam_ptr;
+extern FILE *logfile;
+extern int loglevel;
+
+enum {
+#define DEF(s, n, copy_size) INDEX_op_ ## s,
+#include "opc.h"
+#undef DEF
+    NB_OPS,
+};
+
+#include "gen-op.h"
+#include "op-hacks.h"
+
+#define OS_BYTE 0
+#define OS_WORD 1
+#define OS_LONG 2
+#define OS_SINGLE 4
+#define OS_DOUBLE 5
+
+#define DREG(insn, pos) (((insn >> pos) & 7) + QREG_D0)
+#define AREG(insn, pos) (((insn >> pos) & 7) + QREG_A0)
+#define FREG(insn, pos) (((insn >> pos) & 7) + QREG_F0)
+
+#define M68K_INSN_CF_A    (1 << 0)
+#define M68K_INSN_CF_B    (1 << 1)
+#define M68K_INSN_CF_C    (1 << 2)
+#define M68K_INSN_CF_MAC  (1 << 3)
+#define M68K_INSN_CF_EMAC (1 << 4)
+#define M68K_INSN_CF_FPU  (1 << 5)
+
+struct m68k_def_t {
+    const char * name;
+    uint32_t insns;
+};
+
+static m68k_def_t m68k_cpu_defs[] = {
+    {"m5206", M68K_INSN_CF_A},
+    {"cfv4e", M68K_INSN_CF_A | M68K_INSN_CF_B | M68K_INSN_CF_C
+            | M68K_INSN_CF_MAC | M68K_INSN_CF_EMAC | M68K_INSN_CF_FPU},
+    {NULL, 0}, 
+};
+
+typedef void (*disas_proc)(DisasContext *, uint16_t);
+
+#define DISAS_INSN(name) \
+  static void disas_##name (DisasContext *s, uint16_t insn)
+
+/* Generate a load from the specified address.  Narrow values are
+   sign extended to full register width.  */
+static inline int gen_load(int opsize, int addr, int sign)
+{
+    int tmp;
+    switch(opsize) {
+    case OS_BYTE:
+        tmp = gen_new_qreg(QMODE_I32);
+        if (sign)
+            gen_op_ld8s32(tmp, addr);
+        else
+            gen_op_ld8u32(tmp, addr);
+        break;
+    case OS_WORD:
+        tmp = gen_new_qreg(QMODE_I32);
+        if (sign)
+            gen_op_ld16s32(tmp, addr);
+        else
+            gen_op_ld16u32(tmp, addr);
+        break;
+    case OS_LONG:
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_ld32(tmp, addr);
+        break;
+    case OS_SINGLE:
+        tmp = gen_new_qreg(QMODE_F32);
+        gen_op_ldf32(tmp, addr);
+        break;
+    case OS_DOUBLE:
+        tmp  = gen_new_qreg(QMODE_F64);
+        gen_op_ldf64(tmp, addr);
+        break;
+    default:
+        qemu_assert(0, "bad load size");
+    }
+    gen_throws_exception = gen_last_qop;
+    return tmp;
+}
+
+/* Generate a store.  */
+static inline void gen_store(int opsize, int addr, int val)
+{
+    switch(opsize) {
+    case OS_BYTE:
+        gen_op_st8(addr, val);
+        break;
+    case OS_WORD:
+        gen_op_st16(addr, val);
+        break;
+    case OS_LONG:
+        gen_op_st32(addr, val);
+        break;
+    case OS_SINGLE:
+        gen_op_stf32(addr, val);
+        break;
+    case OS_DOUBLE:
+        gen_op_stf64(addr, val);
+        break;
+    default:
+        qemu_assert(0, "bad store size");
+    }
+    gen_throws_exception = gen_last_qop;
+}
+
+/* Generate an unsigned load if VAL is 0 a signed load if val is -1,
+   otherwise generate a store.  */
+static int gen_ldst(int opsize, int addr, int val)
+{
+    if (val > 0) {
+        gen_store(opsize, addr, val);
+        return 0;
+    } else {
+        return gen_load(opsize, addr, val != 0);
+    }
+}
+
+/* Handle a base + index + displacement effective addresss.  A base of
+   -1 means pc-relative.  */
+static int gen_lea_indexed(DisasContext *s, int opsize, int base)
+{
+    int scale;
+    uint32_t offset;
+    uint16_t ext;
+    int add;
+    int tmp;
+
+    offset = s->pc;
+    ext = lduw(s->pc);
+    s->pc += 2;
+    tmp = ((ext >> 12) & 7) + ((ext & 0x8000) ? QREG_A0 : QREG_D0);
+    /* ??? Check W/L bit.  */
+    scale = (ext >> 9) & 3;
+    if (scale == 0) {
+        add = tmp;
+    } else {
+        add = gen_new_qreg(QMODE_I32);
+        gen_op_shl32(add, tmp, gen_im32(scale));
+    }
+    tmp = gen_new_qreg(QMODE_I32);
+    if (base != -1) {
+        gen_op_add32(tmp, base, gen_im32((int8_t)ext));
+        gen_op_add32(tmp, tmp, add);
+    } else {
+        gen_op_add32(tmp, add, gen_im32(offset + (int8_t)ext));
+    }
+    return tmp;
+}
+
+/* Read a 32-bit immediate constant.  */
+static inline uint32_t read_im32(DisasContext *s)
+{
+    uint32_t im;
+    im = ((uint32_t)lduw(s->pc)) << 16;
+    s->pc += 2;
+    im |= lduw(s->pc);
+    s->pc += 2;
+    return im;
+}
+
+
+/* Update the CPU env CC_OP state.  */
+static inline void gen_flush_cc_op(DisasContext *s)
+{
+    if (s->cc_op != CC_OP_DYNAMIC)
+        gen_op_mov32(QREG_CC_OP, gen_im32(s->cc_op));
+}
+
+/* Evaluate all the CC flags.  */
+static inline void gen_flush_flags(DisasContext *s)
+{
+    if (s->cc_op == CC_OP_FLAGS)
+        return;
+    gen_op_flush_flags(s->cc_op);
+    s->cc_op = CC_OP_FLAGS;
+}
+
+static inline int opsize_bytes(int opsize)
+{
+    switch (opsize) {
+    case OS_BYTE: return 1;
+    case OS_WORD: return 2;
+    case OS_LONG: return 4;
+    case OS_SINGLE: return 4;
+    case OS_DOUBLE: return 8;
+    default:
+        qemu_assert(0, "bad operand size");
+    }
+}
+
+/* Assign value to a register.  If the width is less than the register width
+   only the low part of the register is set.  */
+static void gen_partset_reg(int opsize, int reg, int val)
+{
+    int tmp;
+    switch (opsize) {
+    case OS_BYTE:
+        gen_op_and32(reg, reg, gen_im32(0xffffff00));
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, val, gen_im32(0xff));
+        gen_op_or32(reg, reg, tmp);
+        break;
+    case OS_WORD:
+        gen_op_and32(reg, reg, gen_im32(0xffff0000));
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, val, gen_im32(0xffff));
+        gen_op_or32(reg, reg, tmp);
+        break;
+    case OS_LONG:
+        gen_op_mov32(reg, val);
+        break;
+    case OS_SINGLE:
+        gen_op_pack_32_f32(reg, val);
+        break;
+    default:
+        qemu_assert(0, "Bad operand size");
+        break;
+    }
+}
+
+/* Sign or zero extend a value.  */
+static inline int gen_extend(int val, int opsize, int sign)
+{
+    int tmp;
+
+    switch (opsize) {
+    case OS_BYTE:
+        tmp = gen_new_qreg(QMODE_I32);
+        if (sign)
+            gen_op_ext8s32(tmp, val);
+        else
+            gen_op_ext8u32(tmp, val);
+        break;
+    case OS_WORD:
+        tmp = gen_new_qreg(QMODE_I32);
+        if (sign)
+            gen_op_ext16s32(tmp, val);
+        else
+            gen_op_ext16u32(tmp, val);
+        break;
+    case OS_LONG:
+        tmp = val;
+        break;
+    case OS_SINGLE:
+        tmp = gen_new_qreg(QMODE_F32);
+        gen_op_pack_f32_32(tmp, val);
+        break;
+    default:
+        qemu_assert(0, "Bad operand size");
+    }
+    return tmp;
+}
+
+/* Generate code for an "effective address".  Does not adjust the base
+   register for autoincrememnt addressing modes.  */
+static int gen_lea(DisasContext *s, uint16_t insn, int opsize)
+{
+    int reg;
+    int tmp;
+    uint16_t ext;
+    uint32_t offset;
+
+    reg = insn & 7;
+    switch ((insn >> 3) & 7) {
+    case 0: /* Data register direct.  */
+    case 1: /* Address register direct.  */
+        /* ??? generate bad addressing mode fault.  */
+        qemu_assert(0, "invalid addressing mode");
+    case 2: /* Indirect register */
+    case 3: /* Indirect postincrement.  */
+        reg += QREG_A0;
+        return reg;
+    case 4: /* Indirect predecrememnt.  */
+        reg += QREG_A0;
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_sub32(tmp, reg, gen_im32(opsize_bytes(opsize)));
+        return tmp;
+    case 5: /* Indirect displacement.  */
+        reg += QREG_A0;
+        tmp = gen_new_qreg(QMODE_I32);
+        ext = lduw(s->pc);
+        s->pc += 2;
+        gen_op_add32(tmp, reg, gen_im32((int16_t)ext));
+        return tmp;
+    case 6: /* Indirect index + displacement.  */
+        reg += QREG_A0;
+        return gen_lea_indexed(s, opsize, reg);
+    case 7: /* Other */
+        switch (reg) {
+        case 0: /* Absolute short.  */
+            offset = ldsw(s->pc);
+            s->pc += 2;
+            return gen_im32(offset);
+        case 1: /* Absolute long.  */
+            offset = read_im32(s);
+            return gen_im32(offset);
+        case 2: /* pc displacement  */
+            tmp = gen_new_qreg(QMODE_I32);
+            offset = s->pc;
+            offset += ldsw(s->pc);
+            s->pc += 2;
+            return gen_im32(offset);
+        case 3: /* pc index+displacement.  */
+            return gen_lea_indexed(s, opsize, -1);
+        case 4: /* Immediate.  */
+        default:
+            /* ??? generate bad addressing mode fault.  */
+            qemu_assert(0, "invalid addressing mode");
+        }
+    }
+    /* Should never happen.  */
+    return -1;
+}
+
+/* Helper function for gen_ea. Reuse the computed address between the
+   for read/write operands.  */
+static inline int gen_ea_once(DisasContext *s, uint16_t insn, int opsize,
+                              int val, int *addrp)
+{
+    int tmp;
+
+    if (addrp && val > 0) {
+        tmp = *addrp;
+    } else {
+        tmp = gen_lea(s, insn, opsize);
+        if (addrp)
+            *addrp = tmp;
+    }
+    return gen_ldst(opsize, tmp, val);
+}
+
+/* Generate code to load/store a value ito/from an EA.  If VAL > 0 this is
+   a write otherwise it is a read (0 == sign extend, -1 == zero extend).
+   ADDRP is non-null for readwrite operands.  */
+static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val,
+                  int *addrp)
+{
+    int reg;
+    int result;
+    uint32_t offset;
+
+    reg = insn & 7;
+    switch ((insn >> 3) & 7) {
+    case 0: /* Data register direct.  */
+        reg += QREG_D0;
+        if (val > 0) {
+            gen_partset_reg(opsize, reg, val);
+            return 0;
+        } else {
+            return gen_extend(reg, opsize, val);
+        }
+    case 1: /* Address register direct.  */
+        reg += QREG_A0;
+        if (val > 0) {
+            gen_op_mov32(reg, val);
+            return 0;
+        } else {
+            return gen_extend(reg, opsize, val);
+        }
+    case 2: /* Indirect register */
+        reg += QREG_A0;
+        return gen_ldst(opsize, reg, val);
+    case 3: /* Indirect postincrement.  */
+        reg += QREG_A0;
+        result = gen_ldst(opsize, reg, val);
+        /* ??? This is not exception safe.  The instruction may still
+           fault after this point.  */
+        if (val > 0 || !addrp)
+            gen_op_add32(reg, reg, gen_im32(opsize_bytes(opsize)));
+        return result;
+    case 4: /* Indirect predecrememnt.  */
+        {
+            int tmp;
+            if (addrp && val > 0) {
+                tmp = *addrp;
+            } else {
+                tmp = gen_lea(s, insn, opsize);
+                if (addrp)
+                    *addrp = tmp;
+            }
+            result = gen_ldst(opsize, tmp, val);
+            /* ??? This is not exception safe.  The instruction may still
+               fault after this point.  */
+            if (val > 0 || !addrp) {
+                reg += QREG_A0;
+                gen_op_mov32(reg, tmp);
+            }
+        }
+        return result;
+    case 5: /* Indirect displacement.  */
+    case 6: /* Indirect index + displacement.  */
+        return gen_ea_once(s, insn, opsize, val, addrp);
+    case 7: /* Other */
+        switch (reg) {
+        case 0: /* Absolute short.  */
+        case 1: /* Absolute long.  */
+        case 2: /* pc displacement  */
+        case 3: /* pc index+displacement.  */
+            return gen_ea_once(s, insn, opsize, val, addrp);
+        case 4: /* Immediate.  */
+            /* Sign extend values for consistency.  */
+            switch (opsize) {
+            case OS_BYTE:
+                if (val)
+                    offset = ldsb(s->pc + 1);
+                else
+                    offset = ldub(s->pc + 1);
+                s->pc += 2;
+                break;
+            case OS_WORD:
+                if (val)
+                    offset = ldsw(s->pc);
+                else
+                    offset = lduw(s->pc);
+                s->pc += 2;
+                break;
+            case OS_LONG:
+                offset = read_im32(s);
+                break;
+            default:
+                qemu_assert(0, "Bad immediate operand");
+            }
+            return gen_im32(offset);
+        default:
+            qemu_assert(0, "invalid addressing mode");
+        }
+    }
+    /* Should never happen.  */
+    return -1;
+}
+
+static void gen_logic_cc(DisasContext *s, int val)
+{
+    gen_op_logic_cc(val);
+    s->cc_op = CC_OP_LOGIC;
+}
+
+static void gen_jmpcc(DisasContext *s, int cond, int l1)
+{
+    int tmp;
+
+    gen_flush_flags(s);
+    switch (cond) {
+    case 0: /* T */
+        gen_op_jmp(l1);
+        break;
+    case 1: /* F */
+        break;
+    case 2: /* HI (!C && !Z) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z));
+        gen_op_jmp_z32(tmp, l1);
+        break;
+    case 3: /* LS (C || Z) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    case 4: /* CC (!C) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C));
+        gen_op_jmp_z32(tmp, l1);
+        break;
+    case 5: /* CS (C) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    case 6: /* NE (!Z) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
+        gen_op_jmp_z32(tmp, l1);
+        break;
+    case 7: /* EQ (Z) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    case 8: /* VC (!V) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
+        gen_op_jmp_z32(tmp, l1);
+        break;
+    case 9: /* VS (V) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    case 10: /* PL (!N) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N));
+        gen_op_jmp_z32(tmp, l1);
+        break;
+    case 11: /* MI (N) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    case 12: /* GE (!(N ^ V)) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
+        gen_op_xor32(tmp, tmp, QREG_CC_DEST);
+        gen_op_and32(tmp, tmp, gen_im32(CCF_V));
+        gen_op_jmp_z32(tmp, l1);
+        break;
+    case 13: /* LT (N ^ V) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
+        gen_op_xor32(tmp, tmp, QREG_CC_DEST);
+        gen_op_and32(tmp, tmp, gen_im32(CCF_V));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    case 14: /* GT (!(Z || (N ^ V))) */
+        {
+            int l2;
+            l2 = gen_new_label();
+            tmp = gen_new_qreg(QMODE_I32);
+            gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
+            gen_op_jmp_nz32(tmp, l2);
+            tmp = gen_new_qreg(QMODE_I32);
+            gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
+            gen_op_xor32(tmp, tmp, QREG_CC_DEST);
+            gen_op_and32(tmp, tmp, gen_im32(CCF_V));
+            gen_op_jmp_nz32(tmp, l2);
+            gen_op_jmp(l1);
+            gen_set_label(l2);
+        }
+        break;
+    case 15: /* LE (Z || (N ^ V)) */
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
+        gen_op_jmp_nz32(tmp, l1);
+        tmp = gen_new_qreg(QMODE_I32);
+        gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
+        gen_op_xor32(tmp, tmp, QREG_CC_DEST);
+        gen_op_and32(tmp, tmp, gen_im32(CCF_V));
+        gen_op_jmp_nz32(tmp, l1);
+        break;
+    default:
+        /* Should ever happen.  */
+        abort();
+    }
+}
+
+DISAS_INSN(scc)
+{
+    int l1;
+    int cond;
+    int reg;
+
+    l1 = gen_new_label();
+    cond = (insn >> 8) & 0xf;
+    reg = DREG(insn, 0);
+    gen_op_and32(reg, reg, gen_im32(0xffffff00));
+    gen_jmpcc(s, cond ^ 1, l1);
+    gen_op_or32(reg, reg, gen_im32(0xff));
+    gen_set_label(l1);
+}
+
+/* Generate a jump to to the address in qreg DEST.  */
+static void gen_jmp(DisasContext *s, int dest)
+{
+    gen_flush_cc_op(s);
+    gen_op_mov32(QREG_PC, dest);
+    s->is_jmp = DISAS_JUMP;
+}
+
+static void gen_exception(DisasContext *s, uint32_t where, int nr)
+{
+    gen_flush_cc_op(s);
+    gen_jmp(s, gen_im32(where));
+    gen_op_raise_exception(nr);
+}
+
+/* Generate a jump to an immediate address.  */
+static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
+{
+    TranslationBlock *tb;
+
+    tb = s->tb;
+    if (__builtin_expect (s->singlestep_enabled, 0)) {
+        gen_exception(s, dest, EXCP_DEBUG);
+    } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
+               (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
+        gen_op_goto_tb(0, n, (long)tb);
+        gen_op_mov32(QREG_PC, gen_im32(dest));
+        gen_op_mov32(QREG_T0, gen_im32((long)tb + n));
+        gen_op_exit_tb();
+    } else {
+        gen_jmp(s, gen_im32(dest));
+        gen_op_mov32(QREG_T0, gen_im32(0));
+        gen_op_exit_tb();
+    }
+    s->is_jmp = DISAS_TB_JUMP;
+}
+
+DISAS_INSN(undef_mac)
+{
+    gen_exception(s, s->pc - 2, EXCP_LINEA);
+}
+
+DISAS_INSN(undef_fpu)
+{
+    gen_exception(s, s->pc - 2, EXCP_LINEF);
+}
+
+DISAS_INSN(undef)
+{
+    gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
+    cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
+              insn, s->pc - 2);
+}
+
+DISAS_INSN(mulw)
+{
+    int reg;
+    int tmp;
+    int src;
+    int sign;
+
+    sign = (insn & 0x100) != 0;
+    reg = DREG(insn, 9);
+    tmp = gen_new_qreg(QMODE_I32);
+    if (sign)
+        gen_op_ext16s32(tmp, reg);
+    else
+        gen_op_ext16u32(tmp, reg);
+    src = gen_ea(s, insn, OS_WORD, sign ? -1 : 0, NULL);
+    gen_op_mul32(tmp, tmp, src);
+    gen_op_mov32(reg, tmp);
+    /* Unlike m68k, coldfire always clears the overflow bit.  */
+    gen_logic_cc(s, tmp);
+}
+
+DISAS_INSN(divw)
+{
+    int reg;
+    int tmp;
+    int src;
+    int sign;
+
+    sign = (insn & 0x100) != 0;
+    reg = DREG(insn, 9);
+    if (sign) {
+        gen_op_ext16s32(QREG_DIV1, reg);
+    } else {
+        gen_op_ext16u32(QREG_DIV1, reg);
+    }
+    src = gen_ea(s, insn, OS_WORD, sign ? -1 : 0, NULL);
+    gen_op_mov32(QREG_DIV2, src);
+    if (sign) {
+        gen_op_divs(1);
+    } else {
+        gen_op_divu(1);
+    }
+
+    tmp = gen_new_qreg(QMODE_I32);
+    src = gen_new_qreg(QMODE_I32);
+    gen_op_ext16u32(tmp, QREG_DIV1);
+    gen_op_shl32(src, QREG_DIV2, gen_im32(16));
+    gen_op_or32(reg, tmp, src);
+    gen_op_flags_set();
+    s->cc_op = CC_OP_FLAGS;
+}
+
+DISAS_INSN(divl)
+{
+    int num;
+    int den;
+    int reg;
+    uint16_t ext;
+
+    ext = lduw(s->pc);
+    s->pc += 2;
+    if (ext & 0x87f8) {
+        gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
+        return;
+    }
+    num = DREG(ext, 12);
+    reg = DREG(ext, 0);
+    gen_op_mov32(QREG_DIV1, num);
+    den = gen_ea(s, insn, OS_LONG, 0, NULL);
+    gen_op_mov32(QREG_DIV2, den);
+    if (ext & 0x0800) {
+        gen_op_divs(0);
+    } else {
+        gen_op_divu(0);
+    }
+    if (num == reg) {
+        /* div */
+        gen_op_mov32 (reg, QREG_DIV1);
+    } else {
+        /* rem */
+        gen_op_mov32 (reg, QREG_DIV2);
+    }
+    gen_op_flags_set();
+    s->cc_op = CC_OP_FLAGS;
+}
+
+DISAS_INSN(addsub)
+{
+    int reg;
+    int dest;
+    int src;
+    int tmp;
+    int addr;
+    int add;
+
+    add = (insn & 0x4000) != 0;
+    reg = DREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+    if (insn & 0x100) {
+        tmp = gen_ea(s, insn, OS_LONG, 0, &addr);
+        src = reg;
+    } else {
+        tmp = reg;
+        src = gen_ea(s, insn, OS_LONG, 0, NULL);
+    }
+    if (add) {
+        gen_op_add32(dest, tmp, src);
+        gen_op_update_xflag_lt(dest, src);
+        s->cc_op = CC_OP_ADD;
+    } else {
+        gen_op_update_xflag_lt(tmp, src);
+        gen_op_sub32(dest, tmp, src);
+        s->cc_op = CC_OP_SUB;
+    }
+    gen_op_update_cc_add(dest, src);
+    if (insn & 0x100) {
+        gen_ea(s, insn, OS_LONG, dest, &addr);
+    } else {
+        gen_op_mov32(reg, dest);
+    }
+}
+
+
+/* Reverse the order of the bits in REG.  */
+DISAS_INSN(bitrev)
+{
+    int val;
+    int tmp1;
+    int tmp2;
+    int reg;
+
+    val = gen_new_qreg(QMODE_I32);
+    tmp1 = gen_new_qreg(QMODE_I32);
+    tmp2 = gen_new_qreg(QMODE_I32);
+    reg = DREG(insn, 0);
+    gen_op_mov32(val, reg);
+    /* Reverse bits within each nibble.  */
+    gen_op_shl32(tmp1, val, gen_im32(3));
+    gen_op_and32(tmp1, tmp1, gen_im32(0x88888888));
+    gen_op_shl32(tmp2, val, gen_im32(1));
+    gen_op_and32(tmp2, tmp2, gen_im32(0x44444444));
+    gen_op_or32(tmp1, tmp1, tmp2);
+    gen_op_shr32(tmp2, val, gen_im32(1));
+    gen_op_and32(tmp2, tmp2, gen_im32(0x22222222));
+    gen_op_or32(tmp1, tmp1, tmp2);
+    gen_op_shr32(tmp2, val, gen_im32(3));
+    gen_op_and32(tmp2, tmp2, gen_im32(0x11111111));
+    gen_op_or32(tmp1, tmp1, tmp2);
+    /* Reverse nibbles withing bytes.  */
+    gen_op_shl32(val, tmp1, gen_im32(4));
+    gen_op_and32(val, val, gen_im32(0xf0f0f0f0));
+    gen_op_shr32(tmp2, tmp1, gen_im32(4));
+    gen_op_and32(tmp2, tmp2, gen_im32(0x0f0f0f0f));
+    gen_op_or32(val, val, tmp2);
+    /* Reverse bytes.  */
+    gen_op_bswap32(reg, val);
+    gen_op_mov32(reg, val);
+}
+
+DISAS_INSN(bitop_reg)
+{
+    int opsize;
+    int op;
+    int src1;
+    int src2;
+    int tmp;
+    int addr;
+    int dest;
+
+    if ((insn & 0x38) != 0)
+        opsize = OS_BYTE;
+    else
+        opsize = OS_LONG;
+    op = (insn >> 6) & 3;
+    src1 = gen_ea(s, insn, opsize, 0, op ? &addr: NULL);
+    src2 = DREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+
+    gen_flush_flags(s);
+    tmp = gen_new_qreg(QMODE_I32);
+    if (opsize == OS_BYTE)
+        gen_op_and32(tmp, src2, gen_im32(7));
+    else
+        gen_op_and32(tmp, src2, gen_im32(31));
+    src2 = tmp;
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_shl32(tmp, gen_im32(1), src2);
+
+    gen_op_btest(src1, tmp);
+    switch (op) {
+    case 1: /* bchg */
+        gen_op_xor32(dest, src1, tmp);
+        break;
+    case 2: /* bclr */
+        gen_op_not32(tmp, tmp);
+        gen_op_and32(dest, src1, tmp);
+        break;
+    case 3: /* bset */
+        gen_op_or32(dest, src1, tmp);
+        break;
+    default: /* btst */
+        break;
+    }
+    if (op)
+        gen_ea(s, insn, opsize, dest, &addr);
+}
+
+DISAS_INSN(sats)
+{
+    int reg;
+    int tmp;
+    int l1;
+
+    reg = DREG(insn, 0);
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_flush_flags(s);
+    gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
+    l1 = gen_new_label();
+    gen_op_jmp_z32(tmp, l1);
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_shr32(tmp, reg, gen_im32(31));
+    gen_op_xor32(tmp, tmp, gen_im32(0x80000000));
+    gen_op_mov32(reg, tmp);
+    gen_set_label(l1);
+    gen_logic_cc(s, tmp);
+}
+
+static void gen_push(int val)
+{
+    int tmp;
+
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_sub32(tmp, QREG_SP, gen_im32(4));
+    gen_store(OS_LONG, tmp, val);
+    gen_op_mov32(QREG_SP, tmp);
+}
+
+DISAS_INSN(movem)
+{
+    int addr;
+    int i;
+    uint16_t mask;
+    int reg;
+    int tmp;
+    int is_load;
+
+    mask = lduw(s->pc);
+    s->pc += 2;
+    tmp = gen_lea(s, insn, OS_LONG);
+    addr = gen_new_qreg(QMODE_I32);
+    gen_op_mov32(addr, tmp);
+    is_load = ((insn & 0x0400) != 0);
+    for (i = 0; i < 16; i++, mask >>= 1) {
+        if (mask & 1) {
+            if (i < 8)
+                reg = DREG(i, 0);
+            else
+                reg = AREG(i, 0);
+            if (is_load) {
+                tmp = gen_load(OS_LONG, addr, 0);
+                gen_op_mov32(reg, tmp);
+            } else {
+                gen_store(OS_LONG, addr, reg);
+            }
+            if (mask != 1)
+                gen_op_add32(addr, addr, gen_im32(4));
+        }
+    }
+}
+
+DISAS_INSN(bitop_im)
+{
+    int opsize;
+    int op;
+    int src1;
+    uint32_t mask;
+    int bitnum;
+    int tmp;
+    int addr;
+    int dest;
+
+    if ((insn & 0x38) != 0)
+        opsize = OS_BYTE;
+    else
+        opsize = OS_LONG;
+    op = (insn >> 6) & 3;
+
+    bitnum = lduw(s->pc);
+    s->pc += 2;
+    if (bitnum & 0xff00) {
+        disas_undef(s, insn);
+        return;
+    }
+
+    src1 = gen_ea(s, insn, opsize, 0, op ? &addr: NULL);
+
+    gen_flush_flags(s);
+    tmp = gen_new_qreg(QMODE_I32);
+    if (opsize == OS_BYTE)
+        bitnum &= 7;
+    else
+        bitnum &= 31;
+    mask = 1 << bitnum;
+
+    gen_op_btest(src1, gen_im32(mask));
+    if (op)
+        dest = gen_new_qreg(QMODE_I32);
+    else
+        dest = -1;
+
+    switch (op) {
+    case 1: /* bchg */
+        gen_op_xor32(dest, src1, gen_im32(mask));
+        break;
+    case 2: /* bclr */
+        gen_op_and32(dest, src1, gen_im32(~mask));
+        break;
+    case 3: /* bset */
+        gen_op_or32(dest, src1, gen_im32(mask));
+        break;
+    default: /* btst */
+        break;
+    }
+    if (op)
+        gen_ea(s, insn, opsize, dest, &addr);
+}
+
+DISAS_INSN(arith_im)
+{
+    int op;
+    int src1;
+    int dest;
+    int src2;
+    int addr;
+
+    op = (insn >> 9) & 7;
+    src1 = gen_ea(s, insn, OS_LONG, 0, (op == 6) ? NULL : &addr);
+    src2 = gen_im32(read_im32(s));
+    dest = gen_new_qreg(QMODE_I32);
+    switch (op) {
+    case 0: /* ori */
+        gen_op_or32(dest, src1, src2);
+        gen_logic_cc(s, dest);
+        break;
+    case 1: /* andi */
+        gen_op_and32(dest, src1, src2);
+        gen_logic_cc(s, dest);
+        break;
+    case 2: /* subi */
+        gen_op_mov32(dest, src1);
+        gen_op_update_xflag_lt(dest, src2);
+        gen_op_sub32(dest, dest, src2);
+        gen_op_update_cc_add(dest, src2);
+        s->cc_op = CC_OP_SUB;
+        break;
+    case 3: /* addi */
+        gen_op_mov32(dest, src1);
+        gen_op_add32(dest, dest, src2);
+        gen_op_update_cc_add(dest, src2);
+        gen_op_update_xflag_lt(dest, src2);
+        s->cc_op = CC_OP_ADD;
+        break;
+    case 5: /* eori */
+        gen_op_xor32(dest, src1, src2);
+        gen_logic_cc(s, dest);
+        break;
+    case 6: /* cmpi */
+        gen_op_mov32(dest, src1);
+        gen_op_sub32(dest, dest, src2);
+        gen_op_update_cc_add(dest, src2);
+        s->cc_op = CC_OP_SUB;
+        break;
+    default:
+        abort();
+    }
+    if (op != 6) {
+        gen_ea(s, insn, OS_LONG, dest, &addr);
+    }
+}
+
+DISAS_INSN(byterev)
+{
+    int reg;
+
+    reg = DREG(insn, 0);
+    gen_op_bswap32(reg, reg);
+}
+
+DISAS_INSN(move)
+{
+    int src;
+    int dest;
+    int op;
+    int opsize;
+
+    switch (insn >> 12) {
+    case 1: /* move.b */
+        opsize = OS_BYTE;
+        break;
+    case 2: /* move.l */
+        opsize = OS_LONG;
+        break;
+    case 3: /* move.w */
+        opsize = OS_WORD;
+        break;
+    default:
+        abort();
+    }
+    src = gen_ea(s, insn, opsize, -1, NULL);
+    op = (insn >> 6) & 7;
+    if (op == 1) {
+        /* movea */
+        /* The value will already have been sign extended.  */
+        dest = AREG(insn, 9);
+        gen_op_mov32(dest, src);
+    } else {
+        /* normal move */
+        uint16_t dest_ea;
+        dest_ea = ((insn >> 9) & 7) | (op << 3);
+        gen_ea(s, dest_ea, opsize, src, NULL);
+        /* This will be correct because loads sign extend.  */
+        gen_logic_cc(s, src);
+    }
+}
+
+DISAS_INSN(negx)
+{
+    int reg;
+    int dest;
+    int tmp;
+
+    gen_flush_flags(s);
+    reg = DREG(insn, 0);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_mov32 (dest, gen_im32(0));
+    gen_op_subx_cc(dest, reg);
+    /* !Z is sticky.  */
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_mov32 (tmp, QREG_CC_DEST);
+    gen_op_update_cc_add(dest, reg);
+    gen_op_mov32(reg, dest);
+    s->cc_op = CC_OP_DYNAMIC;
+    gen_flush_flags(s);
+    gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
+    gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
+    s->cc_op = CC_OP_FLAGS;
+}
+
+DISAS_INSN(lea)
+{
+    int reg;
+    int tmp;
+
+    reg = AREG(insn, 9);
+    tmp = gen_lea(s, insn, OS_LONG);
+    gen_op_mov32(reg, tmp);
+}
+
+DISAS_INSN(clr)
+{
+    int opsize;
+
+    switch ((insn >> 6) & 3) {
+    case 0: /* clr.b */
+        opsize = OS_BYTE;
+        break;
+    case 1: /* clr.w */
+        opsize = OS_WORD;
+        break;
+    case 2: /* clr.l */
+        opsize = OS_LONG;
+        break;
+    default:
+        abort();
+    }
+    gen_ea (s, insn, opsize, gen_im32(0), NULL);
+    gen_logic_cc(s, gen_im32(0));
+}
+
+DISAS_INSN(move_from_ccr)
+{
+    int reg;
+    int dest;
+
+    gen_flush_flags(s);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_get_xflag(dest);
+    gen_op_shl32(dest, dest, gen_im32(4));
+    gen_op_or32(dest, dest, QREG_CC_DEST);
+    reg = DREG(insn, 0);
+    gen_partset_reg(OS_WORD, reg, dest);
+}
+
+DISAS_INSN(neg)
+{
+    int reg;
+    int src1;
+
+    reg = DREG(insn, 0);
+    src1 = gen_new_qreg(QMODE_I32);
+    gen_op_mov32(src1, reg);
+    gen_op_neg32(reg, src1);
+    s->cc_op = CC_OP_SUB;
+    gen_op_update_cc_add(reg, src1);
+    gen_op_update_xflag_lt(gen_im32(0), src1);
+    s->cc_op = CC_OP_SUB;
+}
+
+DISAS_INSN(move_to_ccr)
+{
+    int src1;
+    int reg;
+
+    s->cc_op = CC_OP_FLAGS;
+    if ((insn & 0x38) == 0)
+      {
+        src1 = gen_new_qreg(QMODE_I32);
+        reg = DREG(insn, 0);
+        gen_op_and32(src1, reg, gen_im32(0xf));
+        gen_op_logic_cc(src1);
+        gen_op_shr32(src1, reg, gen_im32(4));
+        gen_op_and32(src1, src1, gen_im32(1));
+        gen_op_update_xflag_tst(src1);
+      }
+    else if ((insn & 0x3f) != 0x3c)
+      {
+        uint8_t val;
+        val = ldsb(s->pc);
+        s->pc += 2;
+        gen_op_logic_cc(gen_im32(val & 0xf));
+        gen_op_update_xflag_tst(gen_im32((val & 0x10) >> 4));
+      }
+    else
+        disas_undef(s, insn);
+}
+
+DISAS_INSN(not)
+{
+    int reg;
+
+    reg = DREG(insn, 0);
+    gen_op_not32(reg, reg);
+    gen_logic_cc(s, reg);
+}
+
+DISAS_INSN(swap)
+{
+    int dest;
+    int src1;
+    int src2;
+    int reg;
+
+    dest = gen_new_qreg(QMODE_I32);
+    src1 = gen_new_qreg(QMODE_I32);
+    src2 = gen_new_qreg(QMODE_I32);
+    reg = DREG(insn, 0);
+    gen_op_shl32(src1, reg, gen_im32(16));
+    gen_op_shr32(src2, reg, gen_im32(16));
+    gen_op_or32(dest, src1, src2);
+    gen_op_mov32(reg, dest);
+    gen_logic_cc(s, dest);
+}
+
+DISAS_INSN(pea)
+{
+    int tmp;
+
+    tmp = gen_lea(s, insn, OS_LONG);
+    gen_push(tmp);
+}
+
+DISAS_INSN(ext)
+{
+    int reg;
+    int op;
+    int tmp;
+
+    reg = DREG(insn, 0);
+    op = (insn >> 6) & 7;
+    tmp = gen_new_qreg(QMODE_I32);
+    if (op == 3)
+        gen_op_ext16s32(tmp, reg);
+    else
+        gen_op_ext8s32(tmp, reg);
+    if (op == 2)
+        gen_partset_reg(OS_WORD, reg, tmp);
+    else
+      gen_op_mov32(reg, tmp);
+    gen_logic_cc(s, tmp);
+}
+
+DISAS_INSN(tst)
+{
+    int opsize;
+    int tmp;
+
+    switch ((insn >> 6) & 3) {
+    case 0: /* tst.b */
+        opsize = OS_BYTE;
+        break;
+    case 1: /* tst.w */
+        opsize = OS_WORD;
+        break;
+    case 2: /* tst.l */
+        opsize = OS_LONG;
+        break;
+    default:
+        abort();
+    }
+    tmp = gen_ea(s, insn, opsize, -1, NULL);
+    gen_logic_cc(s, tmp);
+}
+
+DISAS_INSN(pulse)
+{
+  /* Implemented as a NOP.  */
+}
+
+DISAS_INSN(illegal)
+{
+    gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
+}
+
+/* ??? This should be atomic.  */
+DISAS_INSN(tas)
+{
+    int dest;
+    int src1;
+    int addr;
+
+    dest = gen_new_qreg(QMODE_I32);
+    src1 = gen_ea(s, insn, OS_BYTE, -1, &addr);
+    gen_logic_cc(s, src1);
+    gen_op_or32(dest, src1, gen_im32(0x80));
+    gen_ea(s, insn, OS_BYTE, dest, &addr);
+}
+
+DISAS_INSN(mull)
+{
+    uint16_t ext;
+    int reg;
+    int src1;
+    int dest;
+
+    /* The upper 32 bits of the product are discarded, so
+       muls.l and mulu.l are functionally equivalent.  */
+    ext = lduw(s->pc);
+    s->pc += 2;
+    if (ext & 0x87ff) {
+        gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
+        return;
+    }
+    reg = DREG(ext, 12);
+    src1 = gen_ea(s, insn, OS_LONG, 0, NULL);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_mul32(dest, src1, reg);
+    gen_op_mov32(reg, dest);
+    /* Unlike m68k, coldfire always clears the overflow bit.  */
+    gen_logic_cc(s, dest);
+}
+
+DISAS_INSN(link)
+{
+    int16_t offset;
+    int reg;
+    int tmp;
+
+    offset = ldsw(s->pc);
+    s->pc += 2;
+    reg = AREG(insn, 0);
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_sub32(tmp, QREG_SP, gen_im32(4));
+    gen_store(OS_LONG, tmp, reg);
+    if (reg != QREG_SP)
+        gen_op_mov32(reg, tmp);
+    gen_op_add32(QREG_SP, tmp, gen_im32(offset));
+}
+
+DISAS_INSN(unlk)
+{
+    int src;
+    int reg;
+    int tmp;
+
+    src = gen_new_qreg(QMODE_I32);
+    reg = AREG(insn, 0);
+    gen_op_mov32(src, reg);
+    tmp = gen_load(OS_LONG, src, 0);
+    gen_op_mov32(reg, tmp);
+    gen_op_add32(QREG_SP, src, gen_im32(4));
+}
+
+DISAS_INSN(nop)
+{
+}
+
+DISAS_INSN(rts)
+{
+    int tmp;
+
+    tmp = gen_load(OS_LONG, QREG_SP, 0);
+    gen_op_add32(QREG_SP, QREG_SP, gen_im32(4));
+    gen_jmp(s, tmp);
+}
+
+DISAS_INSN(jump)
+{
+    int tmp;
+
+    /* Load the target address first to ensure correct exception
+       behavior.  */
+    tmp = gen_lea(s, insn, OS_LONG);
+    if ((insn & 0x40) == 0) {
+        /* jsr */
+        gen_push(gen_im32(s->pc));
+    }
+    gen_jmp(s, tmp);
+}
+
+DISAS_INSN(addsubq)
+{
+    int src1;
+    int src2;
+    int dest;
+    int val;
+    int addr;
+
+    src1 = gen_ea(s, insn, OS_LONG, 0, &addr);
+    val = (insn >> 9) & 7;
+    if (val == 0)
+        val = 8;
+    src2 = gen_im32(val);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_mov32(dest, src1);
+    if ((insn & 0x38) == 0x08) {
+        /* Don't update condition codes if the destination is an
+           address register.  */
+        if (insn & 0x0100) {
+            gen_op_sub32(dest, dest, src2);
+        } else {
+            gen_op_add32(dest, dest, src2);
+        }
+    } else {
+        if (insn & 0x0100) {
+            gen_op_update_xflag_lt(dest, src2);
+            gen_op_sub32(dest, dest, src2);
+            s->cc_op = CC_OP_SUB;
+        } else {
+            gen_op_add32(dest, dest, src2);
+            gen_op_update_xflag_lt(dest, src2);
+            s->cc_op = CC_OP_ADD;
+        }
+        gen_op_update_cc_add(dest, src2);
+    }
+    gen_ea(s, insn, OS_LONG, dest, &addr);
+}
+
+DISAS_INSN(tpf)
+{
+    switch (insn & 7) {
+    case 2: /* One extension word.  */
+        s->pc += 2;
+        break;
+    case 3: /* Two extension words.  */
+        s->pc += 4;
+        break;
+    case 4: /* No extension words.  */
+        break;
+    default:
+        disas_undef(s, insn);
+    }
+}
+
+DISAS_INSN(branch)
+{
+    int32_t offset;
+    uint32_t base;
+    int op;
+    int l1;
+    
+    base = s->pc;
+    op = (insn >> 8) & 0xf;
+    offset = (int8_t)insn;
+    if (offset == 0) {
+        offset = ldsw(s->pc);
+        s->pc += 2;
+    } else if (offset == -1) {
+        offset = read_im32(s);
+    }
+    if (op == 1) {
+        /* bsr */
+        gen_push(gen_im32(s->pc));
+    }
+    gen_flush_cc_op(s);
+    if (op > 1) {
+        /* Bcc */
+        l1 = gen_new_label();
+        gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
+        gen_jmp_tb(s, 1, base + offset);
+        gen_set_label(l1);
+        gen_jmp_tb(s, 0, s->pc);
+    } else {
+        /* Unconditional branch.  */
+        gen_jmp_tb(s, 0, base + offset);
+    }
+}
+
+DISAS_INSN(moveq)
+{
+    int tmp;
+
+    tmp = gen_im32((int8_t)insn);
+    gen_op_mov32(DREG(insn, 9), tmp);
+    gen_logic_cc(s, tmp);
+}
+
+DISAS_INSN(mvzs)
+{
+    int opsize;
+    int src;
+    int reg;
+
+    if (insn & 0x40)
+        opsize = OS_WORD;
+    else
+        opsize = OS_BYTE;
+    src = gen_ea(s, insn, opsize, (insn & 0x80) ? 0 : -1, NULL);
+    reg = DREG(insn, 9);
+    gen_op_mov32(reg, src);
+    gen_logic_cc(s, src);
+}
+
+DISAS_INSN(or)
+{
+    int reg;
+    int dest;
+    int src;
+    int addr;
+
+    reg = DREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+    if (insn & 0x100) {
+        src = gen_ea(s, insn, OS_LONG, 0, &addr);
+        gen_op_or32(dest, src, reg);
+        gen_ea(s, insn, OS_LONG, dest, &addr);
+    } else {
+        src = gen_ea(s, insn, OS_LONG, 0, NULL);
+        gen_op_or32(dest, src, reg);
+        gen_op_mov32(reg, dest);
+    }
+    gen_logic_cc(s, dest);
+}
+
+DISAS_INSN(suba)
+{
+    int src;
+    int reg;
+
+    src = gen_ea(s, insn, OS_LONG, 0, NULL);
+    reg = AREG(insn, 9);
+    gen_op_sub32(reg, reg, src);
+}
+
+DISAS_INSN(subx)
+{
+    int reg;
+    int src;
+    int dest;
+    int tmp;
+
+    gen_flush_flags(s);
+    reg = DREG(insn, 9);
+    src = DREG(insn, 0);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_mov32 (dest, reg);
+    gen_op_subx_cc(dest, src);
+    /* !Z is sticky.  */
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_mov32 (tmp, QREG_CC_DEST);
+    gen_op_update_cc_add(dest, src);
+    gen_op_mov32(reg, dest);
+    s->cc_op = CC_OP_DYNAMIC;
+    gen_flush_flags(s);
+    gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
+    gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
+    s->cc_op = CC_OP_FLAGS;
+}
+
+DISAS_INSN(mov3q)
+{
+    int src;
+    int val;
+
+    val = (insn >> 9) & 7;
+    if (val == 0)
+        val = -1;
+    src = gen_im32(val);
+    gen_logic_cc(s, src);
+    gen_ea(s, insn, OS_LONG, src, NULL);
+}
+
+DISAS_INSN(cmp)
+{
+    int op;
+    int src;
+    int reg;
+    int dest;
+    int opsize;
+
+    op = (insn >> 6) & 3;
+    switch (op) {
+    case 0: /* cmp.b */
+        opsize = OS_BYTE;
+        s->cc_op = CC_OP_CMPB;
+        break;
+    case 1: /* cmp.w */
+        opsize = OS_WORD;
+        s->cc_op = CC_OP_CMPW;
+        break;
+    case 2: /* cmp.l */
+        opsize = OS_LONG;
+        s->cc_op = CC_OP_SUB;
+        break;
+    default:
+        abort();
+    }
+    src = gen_ea(s, insn, opsize, -1, NULL);
+    reg = DREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_sub32(dest, reg, src);
+    gen_op_update_cc_add(dest, src);
+}
+
+DISAS_INSN(cmpa)
+{
+    int opsize;
+    int src;
+    int reg;
+    int dest;
+
+    if (insn & 0x100) {
+        opsize = OS_LONG;
+    } else {
+        opsize = OS_WORD;
+    }
+    src = gen_ea(s, insn, opsize, -1, NULL);
+    reg = AREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_sub32(dest, reg, src);
+    gen_op_update_cc_add(dest, src);
+    s->cc_op = CC_OP_SUB;
+}
+
+DISAS_INSN(eor)
+{
+    int src;
+    int reg;
+    int dest;
+    int addr;
+
+    src = gen_ea(s, insn, OS_LONG, 0, &addr);
+    reg = DREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_xor32(dest, src, reg);
+    gen_logic_cc(s, dest);
+    gen_ea(s, insn, OS_LONG, dest, &addr);
+}
+
+DISAS_INSN(and)
+{
+    int src;
+    int reg;
+    int dest;
+    int addr;
+
+    reg = DREG(insn, 9);
+    dest = gen_new_qreg(QMODE_I32);
+    if (insn & 0x100) {
+        src = gen_ea(s, insn, OS_LONG, 0, &addr);
+        gen_op_and32(dest, src, reg);
+        gen_ea(s, insn, OS_LONG, dest, &addr);
+    } else {
+        src = gen_ea(s, insn, OS_LONG, 0, NULL);
+        gen_op_and32(dest, src, reg);
+        gen_op_mov32(reg, dest);
+    }
+    gen_logic_cc(s, dest);
+}
+
+DISAS_INSN(adda)
+{
+    int src;
+    int reg;
+
+    src = gen_ea(s, insn, OS_LONG, 0, NULL);
+    reg = AREG(insn, 9);
+    gen_op_add32(reg, reg, src);
+}
+
+DISAS_INSN(addx)
+{
+    int reg;
+    int src;
+    int dest;
+    int tmp;
+
+    gen_flush_flags(s);
+    reg = DREG(insn, 9);
+    src = DREG(insn, 0);
+    dest = gen_new_qreg(QMODE_I32);
+    gen_op_mov32 (dest, reg);
+    gen_op_addx_cc(dest, src);
+    /* !Z is sticky.  */
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_mov32 (tmp, QREG_CC_DEST);
+    gen_op_update_cc_add(dest, src);
+    gen_op_mov32(reg, dest);
+    s->cc_op = CC_OP_DYNAMIC;
+    gen_flush_flags(s);
+    gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
+    gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
+    s->cc_op = CC_OP_FLAGS;
+}
+
+DISAS_INSN(shift_im)
+{
+    int reg;
+    int tmp;
+
+    reg = DREG(insn, 0);
+    tmp = (insn >> 9) & 7;
+    if (tmp == 0)
+      tmp = 8;
+    if (insn & 0x100) {
+        gen_op_shl_im_cc(reg, tmp);
+        s->cc_op = CC_OP_SHL;
+    } else {
+        if (insn & 8) {
+            gen_op_shr_im_cc(reg, tmp);
+            s->cc_op = CC_OP_SHR;
+        } else {
+            gen_op_sar_im_cc(reg, tmp);
+            s->cc_op = CC_OP_SAR;
+        }
+    }
+}
+
+DISAS_INSN(shift_reg)
+{
+    int reg;
+    int src;
+    int tmp;
+
+    reg = DREG(insn, 0);
+    src = DREG(insn, 9);
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_and32(tmp, src, gen_im32(63));
+    if (insn & 0x100) {
+        gen_op_shl_cc(reg, tmp);
+        s->cc_op = CC_OP_SHL;
+    } else {
+        if (insn & 8) {
+            gen_op_shr_cc(reg, tmp);
+            s->cc_op = CC_OP_SHR;
+        } else {
+            gen_op_sar_cc(reg, tmp);
+            s->cc_op = CC_OP_SAR;
+        }
+    }
+}
+
+DISAS_INSN(ff1)
+{
+    cpu_abort(NULL, "Unimplemented insn: ff1");
+}
+
+DISAS_INSN(strldsr)
+{
+    uint16_t ext;
+    uint32_t addr;
+
+    addr = s->pc - 2;
+    ext = lduw(s->pc);
+    s->pc += 2;
+    if (ext != 0x46FC)
+        gen_exception(s, addr, EXCP_UNSUPPORTED);
+    else
+        gen_exception(s, addr, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(move_from_sr)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(move_to_sr)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(move_from_usp)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(move_to_usp)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(halt)
+{
+    gen_exception(s, s->pc, EXCP_HLT);
+}
+
+DISAS_INSN(stop)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(rte)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(movec)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(intouch)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(cpushl)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(wddata)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(wdebug)
+{
+    gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(trap)
+{
+    gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
+}
+
+/* ??? FP exceptions are not implemented.  Most exceptions are deferred until
+   immediately before the next FP instruction is executed.  */
+DISAS_INSN(fpu)
+{
+    uint16_t ext;
+    int opmode;
+    int src;
+    int dest;
+    int res;
+    int round;
+    int opsize;
+
+    ext = lduw(s->pc);
+    s->pc += 2;
+    opmode = ext & 0x7f;
+    switch ((ext >> 13) & 7) {
+    case 0: case 2:
+        break;
+    case 1:
+        goto undef;
+    case 3: /* fmove out */
+        src = FREG(ext, 7);
+        /* fmove */
+        /* ??? TODO: Proper behavior on overflow.  */
+        switch ((ext >> 10) & 7) {
+        case 0:
+            opsize = OS_LONG;
+            res = gen_new_qreg(QMODE_I32);
+            gen_op_f64_to_i32(res, src);
+            break;
+        case 1:
+            opsize = OS_SINGLE;
+            res = gen_new_qreg(QMODE_F32);
+            gen_op_f64_to_f32(res, src);
+            break;
+        case 4:
+            opsize = OS_WORD;
+            res = gen_new_qreg(QMODE_I32);
+            gen_op_f64_to_i32(res, src);
+            break;
+        case 5:
+            opsize = OS_DOUBLE;
+            res = src;
+            break;
+        case 6:
+            opsize = OS_BYTE;
+            res = gen_new_qreg(QMODE_I32);
+            gen_op_f64_to_i32(res, src);
+            break;
+        default:
+            goto undef;
+        }
+        gen_ea(s, insn, opsize, res, NULL);
+        return;
+    case 4: /* fmove to control register.  */
+        switch ((ext >> 10) & 7) {
+        case 4: /* FPCR */
+            /* Not implemented.  Ignore writes.  */
+            break;
+        case 1: /* FPIAR */
+        case 2: /* FPSR */
+        default:
+            cpu_abort(NULL, "Unimplemented: fmove to control %d",
+                      (ext >> 10) & 7);
+        }
+        break;
+    case 5: /* fmove from control register.  */
+        switch ((ext >> 10) & 7) {
+        case 4: /* FPCR */
+            /* Not implemented.  Always return zero.  */
+            res = gen_im32(0);
+            break;
+        case 1: /* FPIAR */
+        case 2: /* FPSR */
+        default:
+            cpu_abort(NULL, "Unimplemented: fmove from control %d",
+                      (ext >> 10) & 7);
+            goto undef;
+        }
+        gen_ea(s, insn, OS_LONG, res, NULL);
+        break;
+    case 6: /* fmovem */ 
+    case 7:
+        {
+        int addr;
+        uint16_t mask;
+        if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
+            goto undef;
+        src = gen_lea(s, insn, OS_LONG);
+        addr = gen_new_qreg(QMODE_I32);
+        gen_op_mov32(addr, src);
+        mask = 0x80;
+        dest = QREG_F0;
+        while (mask) {
+            if (ext & mask) {
+                if (ext & (1 << 13)) {
+                    /* store */
+                    gen_op_stf64(addr, dest);
+                } else {
+                    /* load */
+                    gen_op_ldf64(dest, addr);
+                }
+                if (ext & (mask - 1))
+                    gen_op_add32(addr, addr, gen_im32(8));
+            }
+            mask >>= 1;
+            dest++;
+        }
+        }
+        return;
+    }
+    if (ext & (1 << 14)) {
+        int tmp;
+
+        /* Source effective address.  */
+        switch ((ext >> 10) & 7) {
+        case 0: opsize = OS_LONG; break;
+        case 1: opsize = OS_SINGLE; break;
+        case 4: opsize = OS_WORD; break;
+        case 5: opsize = OS_DOUBLE; break;
+        case 6: opsize = OS_BYTE; break;
+        default:
+            goto undef;
+        }
+        tmp = gen_ea(s, insn, opsize, -1, NULL);
+        if (opsize == OS_DOUBLE) {
+            src = tmp;
+        } else {
+            src = gen_new_qreg(QMODE_F64);
+            switch (opsize) {
+            case OS_LONG:
+            case OS_WORD:
+            case OS_BYTE:
+                gen_op_i32_to_f64(src, tmp);
+                break;
+            case OS_SINGLE:
+                gen_op_f32_to_f64(src, tmp);
+                break;
+            }
+        }
+    } else {
+        /* Source register.  */
+        src = FREG(ext, 10);
+    }
+    dest = FREG(ext, 7);
+    res = gen_new_qreg(QMODE_F64);
+    if (opmode != 0x3a)
+        gen_op_movf64(res, dest);
+    round = 1;
+    switch (opmode) {
+    case 0: case 0x40: case 0x44: /* fmove */
+        gen_op_movf64(res, src);
+        break;
+    case 1: /* fint */
+        gen_op_iround_f64(res, src);
+        round = 0;
+        break;
+    case 3: /* fintrz */
+        gen_op_itrunc_f64(res, src);
+        round = 0;
+        break;
+    case 4: case 0x41: case 0x45: /* fsqrt */
+        gen_op_sqrtf64(res, src);
+        break;
+    case 0x18: case 0x58: case 0x5c: /* fabs */
+        gen_op_absf64(res, src);
+        break;
+    case 0x1a: case 0x5a: case 0x5e: /* fneg */
+        gen_op_chsf64(res, src);
+        break;
+    case 0x20: case 0x60: case 0x64: /* fdiv */
+        gen_op_divf64(res, res, src);
+        break;
+    case 0x22: case 0x62: case 0x66: /* fadd */
+        gen_op_addf64(res, res, src);
+        break;
+    case 0x23: case 0x63: case 0x67: /* fmul */
+        gen_op_mulf64(res, res, src);
+        break;
+    case 0x28: case 0x68: case 0x6c: /* fsub */
+        gen_op_subf64(res, res, src);
+        break;
+    case 0x38: /* fcmp */
+        gen_op_sub_cmpf64(res, res, src);
+        dest = 0;
+        round = 0;
+        break;
+    case 0x3a: /* ftst */
+        gen_op_movf64(res, src);
+        dest = 0;
+        round = 0;
+        break;
+    default:
+        goto undef;
+    }
+    if (round) {
+        if (opmode & 0x40) {
+            if ((opmode & 0x4) != 0)
+                round = 0;
+        } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
+            round = 0;
+        }
+    }
+    if (round) {
+        int tmp;
+
+        tmp = gen_new_qreg(QMODE_F32);
+        gen_op_f64_to_f32(tmp, res);
+        gen_op_f32_to_f64(res, tmp);
+    } 
+    gen_op_fp_result(res);
+    if (dest) {
+        gen_op_movf64(dest, res);
+    }
+    return;
+undef:
+    s->pc -= 2;
+    disas_undef_fpu(s, insn);
+}
+
+DISAS_INSN(fbcc)
+{
+    uint32_t offset;
+    uint32_t addr;
+    int flag;
+    int zero;
+    int l1;
+
+    addr = s->pc;
+    offset = ldsw(s->pc);
+    s->pc += 2;
+    if (insn & (1 << 6)) {
+        offset = (offset << 16) | lduw(s->pc);
+        s->pc += 2;
+    }
+
+    l1 = gen_new_label();
+    /* TODO: Raise BSUN exception.  */
+    flag = gen_new_qreg(QMODE_I32);
+    zero = gen_new_qreg(QMODE_F64);
+    gen_op_zerof64(zero);
+    gen_op_compare_quietf64(flag, QREG_FP_RESULT, zero);
+    /* Jump to l1 if condition is true.  */
+    switch (insn & 0xf) {
+    case 0: /* f */
+        break;
+    case 1: /* eq (=0) */
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 2: /* ogt (=1) */
+        gen_op_sub32(flag, flag, gen_im32(1));
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 3: /* oge (=0 or =1) */
+        gen_op_jmp_z32(flag, l1);
+        gen_op_sub32(flag, flag, gen_im32(1));
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 4: /* olt (=-1) */
+        gen_op_jmp_s32(flag, l1);
+        break;
+    case 5: /* ole (=-1 or =0) */
+        gen_op_jmp_s32(flag, l1);
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 6: /* ogl (=-1 or =1) */
+        gen_op_jmp_s32(flag, l1);
+        gen_op_sub32(flag, flag, gen_im32(1));
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 7: /* or (=2) */
+        gen_op_sub32(flag, flag, gen_im32(2));
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 8: /* un (<2) */
+        gen_op_sub32(flag, flag, gen_im32(2));
+        gen_op_jmp_s32(flag, l1);
+        break;
+    case 9: /* ueq (=0 or =2) */
+        gen_op_jmp_z32(flag, l1);
+        gen_op_sub32(flag, flag, gen_im32(2));
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 10: /* ugt (>0) */
+        /* ??? Add jmp_gtu.  */
+        gen_op_sub32(flag, flag, gen_im32(1));
+        gen_op_jmp_ns32(flag, l1);
+        break;
+    case 11: /* uge (>=0) */
+        gen_op_jmp_ns32(flag, l1);
+        break;
+    case 12: /* ult (=-1 or =2) */
+        gen_op_jmp_s32(flag, l1);
+        gen_op_sub32(flag, flag, gen_im32(2));
+        gen_op_jmp_z32(flag, l1);
+        break;
+    case 13: /* ule (!=1) */
+        gen_op_sub32(flag, flag, gen_im32(1));
+        gen_op_jmp_nz32(flag, l1);
+        break;
+    case 14: /* ne (!=0) */
+        gen_op_jmp_nz32(flag, l1);
+        break;
+    case 15: /* t */
+        gen_op_mov32(flag, gen_im32(1));
+        break;
+    }
+    gen_jmp_tb(s, 0, s->pc);
+    gen_set_label(l1);
+    gen_jmp_tb(s, 1, addr + offset);
+}
+
+static disas_proc opcode_table[65536];
+
+static void
+register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
+{
+  int i;
+  int from;
+  int to;
+
+  /* Sanity check.  All set bits must be included in the mask.  */
+  if (opcode & ~mask)
+      abort();
+  /* This could probably be cleverer.  For now just optimize the case where
+     the top bits are known.  */
+  /* Find the first zero bit in the mask.  */
+  i = 0x8000;
+  while ((i & mask) != 0)
+      i >>= 1;
+  /* Iterate over all combinations of this and lower bits.  */
+  if (i == 0)
+      i = 1;
+  else
+      i <<= 1;
+  from = opcode & ~(i - 1);
+  to = from + i;
+  for (i = from; i < to; i++)
+    {
+      if ((i & mask) == opcode)
+          opcode_table[i] = proc;
+    }
+}
+
+/* Register m68k opcode handlers.  Order is important.
+   Later insn override earlier ones.  */
+static void
+register_m68k_insns (m68k_def_t *def)
+{
+    uint32_t iflags;
+
+    iflags = def->insns;
+#define INSN(name, opcode, mask, isa) \
+    if (iflags & M68K_INSN_##isa) \
+        register_opcode(disas_##name, 0x##opcode, 0x##mask)
+    INSN(undef,     0000, 0000, CF_A);
+    INSN(arith_im,  0080, fff8, CF_A);
+    INSN(bitrev,    00c0, fff8, CF_C);
+    INSN(bitop_reg, 0100, f1c0, CF_A);
+    INSN(bitop_reg, 0140, f1c0, CF_A);
+    INSN(bitop_reg, 0180, f1c0, CF_A);
+    INSN(bitop_reg, 01c0, f1c0, CF_A);
+    INSN(arith_im,  0280, fff8, CF_A);
+    INSN(byterev,   02c0, fff8, CF_A);
+    INSN(arith_im,  0480, fff8, CF_A);
+    INSN(ff1,       04c0, fff8, CF_C);
+    INSN(arith_im,  0680, fff8, CF_A);
+    INSN(bitop_im,  0800, ffc0, CF_A);
+    INSN(bitop_im,  0840, ffc0, CF_A);
+    INSN(bitop_im,  0880, ffc0, CF_A);
+    INSN(bitop_im,  08c0, ffc0, CF_A);
+    INSN(arith_im,  0a80, fff8, CF_A);
+    INSN(arith_im,  0c00, ff38, CF_A);
+    INSN(move,      1000, f000, CF_A);
+    INSN(move,      2000, f000, CF_A);
+    INSN(move,      3000, f000, CF_A);
+    INSN(strldsr,   40e7, ffff, CF_A);
+    INSN(negx,      4080, fff8, CF_A);
+    INSN(move_from_sr, 40c0, fff8, CF_A);
+    INSN(lea,       41c0, f1c0, CF_A);
+    INSN(clr,       4200, ff00, CF_A);
+    INSN(undef,     42c0, ffc0, CF_A);
+    INSN(move_from_ccr, 42c0, fff8, CF_A);
+    INSN(neg,       4480, fff8, CF_A);
+    INSN(move_to_ccr, 44c0, ffc0, CF_A);
+    INSN(not,       4680, fff8, CF_A);
+    INSN(move_to_sr, 46c0, ffc0, CF_A);
+    INSN(pea,       4840, ffc0, CF_A);
+    INSN(swap,      4840, fff8, CF_A);
+    INSN(movem,     48c0, fbc0, CF_A);
+    INSN(ext,       4880, fff8, CF_A);
+    INSN(ext,       48c0, fff8, CF_A);
+    INSN(ext,       49c0, fff8, CF_A);
+    INSN(tst,       4a00, ff00, CF_A);
+    INSN(tas,       4ac0, ffc0, CF_B);
+    INSN(halt,      4ac8, ffff, CF_A);
+    INSN(pulse,     4acc, ffff, CF_A);
+    INSN(illegal,   4afc, ffff, CF_A);
+    INSN(mull,      4c00, ffc0, CF_A);
+    INSN(divl,      4c40, ffc0, CF_A);
+    INSN(sats,      4c80, fff8, CF_B);
+    INSN(trap,      4e40, fff0, CF_A);
+    INSN(link,      4e50, fff8, CF_A);
+    INSN(unlk,      4e58, fff8, CF_A);
+    INSN(move_to_usp, 4e60, fff8, CF_B);
+    INSN(move_from_usp, 4e68, fff8, CF_B);
+    INSN(nop,       4e71, ffff, CF_A);
+    INSN(stop,      4e72, ffff, CF_A);
+    INSN(rte,       4e73, ffff, CF_A);
+    INSN(rts,       4e75, ffff, CF_A);
+    INSN(movec,     4e7b, ffff, CF_A);
+    INSN(jump,      4e80, ffc0, CF_A);
+    INSN(jump,      4ec0, ffc0, CF_A);
+    INSN(addsubq,   5180, f1c0, CF_A);
+    INSN(scc,       50c0, f0f8, CF_A);
+    INSN(addsubq,   5080, f1c0, CF_A);
+    INSN(tpf,       51f8, fff8, CF_A);
+    INSN(branch,    6000, f000, CF_A);
+    INSN(moveq,     7000, f100, CF_A);
+    INSN(mvzs,      7100, f100, CF_B);
+    INSN(or,        8000, f000, CF_A);
+    INSN(divw,      80c0, f0c0, CF_A);
+    INSN(addsub,    9000, f000, CF_A);
+    INSN(subx,      9180, f1f8, CF_A);
+    INSN(suba,      91c0, f1c0, CF_A);
+    INSN(undef_mac, a000, f000, CF_A);
+    INSN(mov3q,     a140, f1c0, CF_B);
+    INSN(cmp,       b000, f1c0, CF_B); /* cmp.b */
+    INSN(cmp,       b040, f1c0, CF_B); /* cmp.w */
+    INSN(cmpa,      b0c0, f1c0, CF_B); /* cmpa.w */
+    INSN(cmp,       b080, f1c0, CF_A);
+    INSN(cmpa,      b1c0, f1c0, CF_A);
+    INSN(eor,       b180, f1c0, CF_A);
+    INSN(and,       c000, f000, CF_A);
+    INSN(mulw,      c0c0, f0c0, CF_A);
+    INSN(addsub,    d000, f000, CF_A);
+    INSN(addx,      d180, f1f8, CF_A);
+    INSN(adda,      d1c0, f1c0, CF_A);
+    INSN(shift_im,  e080, f0f0, CF_A);
+    INSN(shift_reg, e0a0, f0f0, CF_A);
+    INSN(undef_fpu, f000, f000, CF_A);
+    INSN(fpu,       f200, ffc0, CF_FPU);
+    INSN(fbcc,      f280, ffc0, CF_FPU);
+    INSN(intouch,   f340, ffc0, CF_A);
+    INSN(cpushl,    f428, ff38, CF_A);
+    INSN(wddata,    fb00, ff00, CF_A);
+    INSN(wdebug,    fbc0, ffc0, CF_A);
+#undef INSN
+}
+
+/* ??? Some of this implementation is not exception safe.  We should always
+   write back the result to memory before setting the condition codes.  */
+static void disas_m68k_insn(CPUState * env, DisasContext *s)
+{
+    uint16_t insn;
+
+    insn = lduw(s->pc);
+    s->pc += 2;
+
+    opcode_table[insn](s, insn);
+}
+
+#if 0
+/* Save the result of a floating point operation.  */
+static void expand_op_fp_result(qOP *qop)
+{
+    gen_op_movf64(QREG_FP_RESULT, qop->args[0]);
+}
+
+/* Dummy op to indicate that the flags have been set.  */
+static void expand_op_flags_set(qOP *qop)
+{
+}
+
+/* Convert the confition codes into CC_OP_FLAGS format.  */
+static void expand_op_flush_flags(qOP *qop)
+{
+    int cc_opreg;
+
+    if (qop->args[0] == CC_OP_DYNAMIC)
+        cc_opreg = QREG_CC_OP;
+    else
+        cc_opreg = gen_im32(qop->args[0]);
+    gen_op_helper32(QREG_NULL, cc_opreg, HELPER_flush_flags);
+}
+
+/* Set CC_DEST after a logical or direct flag setting operation.  */
+static void expand_op_logic_cc(qOP *qop)
+{
+    gen_op_mov32(QREG_CC_DEST, qop->args[0]);
+}
+
+/* Set CC_SRC and CC_DEST after an arithmetic operation.  */
+static void expand_op_update_cc_add(qOP *qop)
+{
+    gen_op_mov32(QREG_CC_DEST, qop->args[0]);
+    gen_op_mov32(QREG_CC_SRC, qop->args[1]);
+}
+
+/* Update the X flag.  */
+static void expand_op_update_xflag(qOP *qop)
+{
+    int arg0;
+    int arg1;
+
+    arg0 = qop->args[0];
+    arg1 = qop->args[1];
+    if (arg1 == QREG_NULL) {
+        /* CC_X = arg0.  */
+        gen_op_mov32(QREG_CC_X, arg0);
+    } else {
+        /* CC_X = arg0 < (unsigned)arg1.  */
+        gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
+    }
+}
+
+/* Set arg0 to the contents of the X flag.  */
+static void expand_op_get_xflag(qOP *qop)
+{
+    gen_op_mov32(qop->args[0], QREG_CC_X);
+}
+
+/* Expand a shift by immediate.  The ISA only allows shifts by 1-8, so we
+   already know the shift is within range.  */
+static inline void expand_shift_im(qOP *qop, int right, int arith)
+{
+    int val;
+    int reg;
+    int tmp;
+    int im;
+
+    reg = qop->args[0];
+    im = qop->args[1];
+    tmp = gen_im32(im);
+    val = gen_new_qreg(QMODE_I32);
+    gen_op_mov32(val, reg);
+    gen_op_mov32(QREG_CC_DEST, val);
+    gen_op_mov32(QREG_CC_SRC, tmp);
+    if (right) {
+        if (arith) {
+            gen_op_sar32(reg, val, tmp);
+        } else {
+            gen_op_shr32(reg, val, tmp);
+        }
+        if (im == 1)
+            tmp = QREG_NULL;
+        else
+            tmp = gen_im32(im - 1);
+    } else {
+        gen_op_shl32(reg, val, tmp);
+        tmp = gen_im32(32 - im);
+    }
+    if (tmp != QREG_NULL)
+        gen_op_shr32(val, val, tmp);
+    gen_op_and32(QREG_CC_X, val, gen_im32(1));
+}
+
+static void expand_op_shl_im_cc(qOP *qop)
+{
+    expand_shift_im(qop, 0, 0);
+}
+
+static void expand_op_shr_im_cc(qOP *qop)
+{
+    expand_shift_im(qop, 1, 0);
+}
+
+static void expand_op_sar_im_cc(qOP *qop)
+{
+    expand_shift_im(qop, 1, 1);
+}
+
+/* Expand a shift by register.  */
+/* ??? This gives incorrect answers for shifts by 0 or >= 32 */
+static inline void expand_shift_reg(qOP *qop, int right, int arith)
+{
+    int val;
+    int reg;
+    int shift;
+    int tmp;
+
+    reg = qop->args[0];
+    shift = qop->args[1];
+    val = gen_new_qreg(QMODE_I32);
+    gen_op_mov32(val, reg);
+    gen_op_mov32(QREG_CC_DEST, val);
+    gen_op_mov32(QREG_CC_SRC, shift);
+    tmp = gen_new_qreg(QMODE_I32);
+    if (right) {
+        if (arith) {
+            gen_op_sar32(reg, val, shift);
+        } else {
+            gen_op_shr32(reg, val, shift);
+        }
+        gen_op_sub32(tmp, shift, gen_im32(1));
+    } else {
+        gen_op_shl32(reg, val, shift);
+        gen_op_sub32(tmp, gen_im32(31), shift);
+    }
+    gen_op_shl32(val, val, tmp);
+    gen_op_and32(QREG_CC_X, val, gen_im32(1));
+}
+
+static void expand_op_shl_cc(qOP *qop)
+{
+    expand_shift_reg(qop, 0, 0);
+}
+
+static void expand_op_shr_cc(qOP *qop)
+{
+    expand_shift_reg(qop, 1, 0);
+}
+
+static void expand_op_sar_cc(qOP *qop)
+{
+    expand_shift_reg(qop, 1, 1);
+}
+
+/* Set the Z flag to (arg0 & arg1) == 0.  */
+static void expand_op_btest(qOP *qop)
+{
+    int tmp;
+    int l1;
+
+    l1 = gen_new_label();
+    tmp = gen_new_qreg(QMODE_I32);
+    gen_op_and32(tmp, qop->args[0], qop->args[1]);
+    gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(~(uint32_t)CCF_Z));
+    gen_op_jmp_nz32(tmp, l1);
+    gen_op_or32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(CCF_Z));
+    gen_op_label(l1);
+}
+
+/* arg0 += arg1 + CC_X */
+static void expand_op_addx_cc(qOP *qop)
+{
+    int arg0 = qop->args[0];
+    int arg1 = qop->args[1];
+    int l1, l2;
+    
+    gen_op_add32 (arg0, arg0, arg1);
+    l1 = gen_new_label();
+    l2 = gen_new_label();
+    gen_op_jmp_z32(QREG_CC_X, l1);
+    gen_op_add32(arg0, arg0, gen_im32(1));
+    gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADDX));
+    gen_op_set_leu32(QREG_CC_X, arg0, arg1);
+    gen_op_jmp(l2);
+    gen_set_label(l1);
+    gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADD));
+    gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
+    gen_set_label(l2);
+}
+
+/* arg0 -= arg1 + CC_X */
+static void expand_op_subx_cc(qOP *qop)
+{
+    int arg0 = qop->args[0];
+    int arg1 = qop->args[1];
+    int l1, l2;
+
+    l1 = gen_new_label();
+    l2 = gen_new_label();
+    gen_op_jmp_z32(QREG_CC_X, l1);
+    gen_op_set_leu32(QREG_CC_X, arg0, arg1);
+    gen_op_sub32(arg0, arg0, gen_im32(1));
+    gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUBX));
+    gen_op_jmp(l2);
+    gen_set_label(l1);
+    gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
+    gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUB));
+    gen_set_label(l2);
+    gen_op_sub32 (arg0, arg0, arg1);
+}
+
+/* Expand target specific ops to generic qops.  */
+static void expand_target_qops(void)
+{
+    qOP *qop;
+    qOP *next;
+    int c;
+
+    /* Copy the list of qops, expanding target specific ops as we go.  */
+    qop = gen_first_qop;
+    gen_first_qop = NULL;
+    gen_last_qop = NULL;
+    for (; qop; qop = next) {
+        c = qop->opcode;
+        next = qop->next;
+        if (c < FIRST_TARGET_OP) {
+            qop->prev = gen_last_qop;
+            qop->next = NULL;
+            if (gen_last_qop)
+                gen_last_qop->next = qop;
+            else
+                gen_first_qop = qop;
+            gen_last_qop = qop;
+            continue;
+        }
+        switch (c) {
+#define DEF(name, nargs, barrier) \
+        case INDEX_op_##name: \
+            expand_op_##name(qop); \
+            break;
+#include "qop-target.def"
+#undef DEF
+        default:
+            cpu_abort(NULL, "Unexpanded target qop");
+        }
+    }
+}
+
+/* ??? Implement this.  */
+static void
+optimize_flags(void)
+{
+}
+#endif
+
+/* generate intermediate code for basic block 'tb'.  */
+int gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
+                                   int search_pc)
+{
+    DisasContext dc1, *dc = &dc1;
+    uint16_t *gen_opc_end;
+    int j, lj;
+    target_ulong pc_start;
+    int pc_offset;
+    int last_cc_op;
+
+    /* generate intermediate code */
+    pc_start = tb->pc;
+       
+    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->cc_op = CC_OP_DYNAMIC;
+    dc->singlestep_enabled = env->singlestep_enabled;
+    dc->fpcr = env->fpcr;
+    nb_gen_labels = 0;
+    lj = -1;
+    do {
+        free_qreg = 0;
+        pc_offset = dc->pc - pc_start;
+        gen_throws_exception = NULL;
+        if (env->nb_breakpoints > 0) {
+            for(j = 0; j < env->nb_breakpoints; j++) {
+                if (env->breakpoints[j] == dc->pc) {
+                    gen_exception(dc, dc->pc, EXCP_DEBUG);
+                    dc->is_jmp = DISAS_JUMP;
+                    break;
+                }
+            }
+            if (dc->is_jmp)
+                break;
+        }
+        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;
+        }
+        last_cc_op = dc->cc_op;
+	disas_m68k_insn(env, dc);
+    } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
+             !env->singlestep_enabled &&
+             (pc_offset) < (TARGET_PAGE_SIZE - 32));
+
+    if (__builtin_expect(env->singlestep_enabled, 0)) {
+        /* Make sure the pc is updated, and raise a debug exception.  */
+        if (!dc->is_jmp) {
+            gen_flush_cc_op(dc);
+            gen_op_mov32(QREG_PC, gen_im32((long)dc->pc));
+        }
+        gen_op_raise_exception(EXCP_DEBUG);
+    } else {
+        switch(dc->is_jmp) {
+        case DISAS_NEXT:
+            gen_flush_cc_op(dc);
+            gen_jmp_tb(dc, 0, dc->pc);
+            break;
+        default:
+        case DISAS_JUMP:
+        case DISAS_UPDATE:
+            gen_flush_cc_op(dc);
+            /* indicate that the hash table must be used to find the next TB */
+            gen_op_mov32(QREG_T0, gen_im32(0));
+            gen_op_exit_tb();
+            break;
+        case DISAS_TB_JUMP:
+            /* nothing more to generate */
+            break;
+        }
+    }
+    *gen_opc_ptr = INDEX_op_end;
+
+#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 - 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
+    if (search_pc) {
+        j = gen_opc_ptr - gen_opc_buf;
+        lj++;
+        while (lj <= j)
+            gen_opc_instr_start[lj++] = 0;
+        tb->size = 0;
+    } else {
+        tb->size = dc->pc - pc_start;
+    }
+
+    //optimize_flags();
+    //expand_target_qops();
+    return 0;
+}
+
+int gen_intermediate_code(CPUState *env, TranslationBlock *tb)
+{
+    return gen_intermediate_code_internal(env, tb, 0);
+}
+
+int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
+{
+    return gen_intermediate_code_internal(env, tb, 1);
+}
+
+CPUM68KState *cpu_m68k_init(void)
+{
+    CPUM68KState *env;
+
+    env = malloc(sizeof(CPUM68KState));
+    if (!env)
+        return NULL;
+    cpu_exec_init(env);
+
+    memset(env, 0, sizeof(CPUM68KState));
+    /* ??? FP regs should be initialized to NaN.  */
+    cpu_single_env = env;
+    env->cc_op = CC_OP_FLAGS;
+    return env;
+}
+
+void cpu_m68k_close(CPUM68KState *env)
+{
+    free(env);
+}
+
+m68k_def_t *m68k_find_by_name(const char *name)
+{
+    m68k_def_t *def;
+
+    def = m68k_cpu_defs;
+    while (def->name)
+      {
+        if (strcmp(def->name, name) == 0)
+            return def;
+        def++;
+      }
+    return NULL;
+}
+
+void cpu_m68k_register(CPUM68KState *env, m68k_def_t *def)
+{
+    register_m68k_insns(def);
+}
+
+void cpu_dump_state(CPUState *env, FILE *f, 
+                    int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
+                    int flags)
+{
+    int i;
+    uint16_t sr;
+    CPU_DoubleU u;
+    for (i = 0; i < 8; i++)
+      {
+        u.d = env->fregs[i];
+        cpu_fprintf (f, "D%d = %08x   A%d = %08x   F%d = %08x%08x (%12g)\n",
+                     i, env->dregs[i], i, env->aregs[i],
+                     i, u.l.upper, u.l.lower, u.d);
+      }
+    cpu_fprintf (f, "PC = %08x   ", env->pc);
+    sr = env->sr;
+    cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
+                 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
+                 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
+    cpu_fprintf (f, "FPRESULT = %12g\n", env->fp_result);
+}
+
+/* ??? */
+target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
+{
+    return addr;
+}
+
+#if defined(CONFIG_USER_ONLY) 
+
+int cpu_m68k_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
+                               int is_user, int is_softmmu)
+{
+    env->exception_index = EXCP_ACCESS;
+    env->mmu.ar = address;
+    return 1;
+}
+
+#else
+
+#error not implemented
+
+#endif