qemu/target-sh4/translate.c

/*
 *  SH4 translation
 *
 *  Copyright (c) 2005 Samuel Tardieu
 *
 * 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
 */
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>

#define DEBUG_DISAS
#define SH4_DEBUG_DISAS
//#define SH4_SINGLE_STEP

#include "cpu.h"
#include "exec-all.h"
#include "disas.h"
#include "tcg-op.h"
#include "qemu-common.h"

#include "helper.h"
#define GEN_HELPER 1
#include "helper.h"

typedef struct DisasContext {
    struct TranslationBlock *tb;
    target_ulong pc;
    uint32_t sr;
    uint32_t fpscr;
    uint16_t opcode;
    uint32_t flags;
    int bstate;
    int memidx;
    uint32_t delayed_pc;
    int singlestep_enabled;
} DisasContext;

#if defined(CONFIG_USER_ONLY)
#define IS_USER(ctx) 1
#else
#define IS_USER(ctx) (!(ctx->sr & SR_MD))
#endif

enum {
    BS_NONE     = 0, /* We go out of the TB without reaching a branch or an
                      * exception condition
                      */
    BS_STOP     = 1, /* We want to stop translation for any reason */
    BS_BRANCH   = 2, /* We reached a branch condition     */
    BS_EXCP     = 3, /* We reached an exception condition */
};

/* global register indexes */
static TCGv_ptr cpu_env;
static TCGv cpu_gregs[24];
static TCGv cpu_pc, cpu_sr, cpu_ssr, cpu_spc, cpu_gbr;
static TCGv cpu_vbr, cpu_sgr, cpu_dbr, cpu_mach, cpu_macl;
static TCGv cpu_pr, cpu_fpscr, cpu_fpul;
static TCGv cpu_fregs[32];

/* internal register indexes */
static TCGv cpu_flags, cpu_delayed_pc;

#include "gen-icount.h"

static void sh4_translate_init(void)
{
    int i;
    static int done_init = 0;
    static const char * const gregnames[24] = {
        "R0_BANK0", "R1_BANK0", "R2_BANK0", "R3_BANK0",
        "R4_BANK0", "R5_BANK0", "R6_BANK0", "R7_BANK0",
        "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15",
        "R0_BANK1", "R1_BANK1", "R2_BANK1", "R3_BANK1",
        "R4_BANK1", "R5_BANK1", "R6_BANK1", "R7_BANK1"
    };
    static const char * const fregnames[32] = {
         "FPR0_BANK0",  "FPR1_BANK0",  "FPR2_BANK0",  "FPR3_BANK0",
         "FPR4_BANK0",  "FPR5_BANK0",  "FPR6_BANK0",  "FPR7_BANK0",
         "FPR8_BANK0",  "FPR9_BANK0", "FPR10_BANK0", "FPR11_BANK0",
        "FPR12_BANK0", "FPR13_BANK0", "FPR14_BANK0", "FPR15_BANK0",
         "FPR0_BANK1",  "FPR1_BANK1",  "FPR2_BANK1",  "FPR3_BANK1",
         "FPR4_BANK1",  "FPR5_BANK1",  "FPR6_BANK1",  "FPR7_BANK1",
         "FPR8_BANK1",  "FPR9_BANK1", "FPR10_BANK1", "FPR11_BANK1",
        "FPR12_BANK1", "FPR13_BANK1", "FPR14_BANK1", "FPR15_BANK1",
    };

    if (done_init)
        return;

    cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");

    for (i = 0; i < 24; i++)
        cpu_gregs[i] = tcg_global_mem_new_i32(TCG_AREG0,
                                              offsetof(CPUState, gregs[i]),
                                              gregnames[i]);

    cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
                                    offsetof(CPUState, pc), "PC");
    cpu_sr = tcg_global_mem_new_i32(TCG_AREG0,
                                    offsetof(CPUState, sr), "SR");
    cpu_ssr = tcg_global_mem_new_i32(TCG_AREG0,
                                     offsetof(CPUState, ssr), "SSR");
    cpu_spc = tcg_global_mem_new_i32(TCG_AREG0,
                                     offsetof(CPUState, spc), "SPC");
    cpu_gbr = tcg_global_mem_new_i32(TCG_AREG0,
                                     offsetof(CPUState, gbr), "GBR");
    cpu_vbr = tcg_global_mem_new_i32(TCG_AREG0,
                                     offsetof(CPUState, vbr), "VBR");
    cpu_sgr = tcg_global_mem_new_i32(TCG_AREG0,
                                     offsetof(CPUState, sgr), "SGR");
    cpu_dbr = tcg_global_mem_new_i32(TCG_AREG0,
                                     offsetof(CPUState, dbr), "DBR");
    cpu_mach = tcg_global_mem_new_i32(TCG_AREG0,
                                      offsetof(CPUState, mach), "MACH");
    cpu_macl = tcg_global_mem_new_i32(TCG_AREG0,
                                      offsetof(CPUState, macl), "MACL");
    cpu_pr = tcg_global_mem_new_i32(TCG_AREG0,
                                    offsetof(CPUState, pr), "PR");
    cpu_fpscr = tcg_global_mem_new_i32(TCG_AREG0,
                                       offsetof(CPUState, fpscr), "FPSCR");
    cpu_fpul = tcg_global_mem_new_i32(TCG_AREG0,
                                      offsetof(CPUState, fpul), "FPUL");

    cpu_flags = tcg_global_mem_new_i32(TCG_AREG0,
				       offsetof(CPUState, flags), "_flags_");
    cpu_delayed_pc = tcg_global_mem_new_i32(TCG_AREG0,
					    offsetof(CPUState, delayed_pc),
					    "_delayed_pc_");

    for (i = 0; i < 32; i++)
        cpu_fregs[i] = tcg_global_mem_new_i32(TCG_AREG0,
                                              offsetof(CPUState, fregs[i]),
                                              fregnames[i]);

    /* register helpers */
#define GEN_HELPER 2
#include "helper.h"

    done_init = 1;
}

void cpu_dump_state(CPUState * env, FILE * f,
		    int (*cpu_fprintf) (FILE * f, const char *fmt, ...),
		    int flags)
{
    int i;
    cpu_fprintf(f, "pc=0x%08x sr=0x%08x pr=0x%08x fpscr=0x%08x\n",
		env->pc, env->sr, env->pr, env->fpscr);
    cpu_fprintf(f, "spc=0x%08x ssr=0x%08x gbr=0x%08x vbr=0x%08x\n",
		env->spc, env->ssr, env->gbr, env->vbr);
    cpu_fprintf(f, "sgr=0x%08x dbr=0x%08x delayed_pc=0x%08x fpul=0x%08x\n",
		env->sgr, env->dbr, env->delayed_pc, env->fpul);
    for (i = 0; i < 24; i += 4) {
	cpu_fprintf(f, "r%d=0x%08x r%d=0x%08x r%d=0x%08x r%d=0x%08x\n",
		    i, env->gregs[i], i + 1, env->gregs[i + 1],
		    i + 2, env->gregs[i + 2], i + 3, env->gregs[i + 3]);
    }
    if (env->flags & DELAY_SLOT) {
	cpu_fprintf(f, "in delay slot (delayed_pc=0x%08x)\n",
		    env->delayed_pc);
    } else if (env->flags & DELAY_SLOT_CONDITIONAL) {
	cpu_fprintf(f, "in conditional delay slot (delayed_pc=0x%08x)\n",
		    env->delayed_pc);
    }
}

static void cpu_sh4_reset(CPUSH4State * env)
{
#if defined(CONFIG_USER_ONLY)
    env->sr = SR_FD;            /* FD - kernel does lazy fpu context switch */
#else
    env->sr = 0x700000F0;	/* MD, RB, BL, I3-I0 */
#endif
    env->vbr = 0;
    env->pc = 0xA0000000;
#if defined(CONFIG_USER_ONLY)
    env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
    set_float_rounding_mode(float_round_nearest_even, &env->fp_status); /* ?! */
#else
    env->fpscr = 0x00040001; /* CPU reset value according to SH4 manual */
    set_float_rounding_mode(float_round_to_zero, &env->fp_status);
#endif
    env->mmucr = 0;
}

typedef struct {
    const char *name;
    int id;
    uint32_t pvr;
    uint32_t prr;
    uint32_t cvr;
} sh4_def_t;

static sh4_def_t sh4_defs[] = {
    {
	.name = "SH7750R",
	.id = SH_CPU_SH7750R,
	.pvr = 0x00050000,
	.prr = 0x00000100,
	.cvr = 0x00110000,
    }, {
	.name = "SH7751R",
	.id = SH_CPU_SH7751R,
	.pvr = 0x04050005,
	.prr = 0x00000113,
	.cvr = 0x00110000,	/* Neutered caches, should be 0x20480000 */
    },
};

static const sh4_def_t *cpu_sh4_find_by_name(const char *name)
{
    int i;

    if (strcasecmp(name, "any") == 0)
	return &sh4_defs[0];

    for (i = 0; i < sizeof(sh4_defs) / sizeof(*sh4_defs); i++)
	if (strcasecmp(name, sh4_defs[i].name) == 0)
	    return &sh4_defs[i];

    return NULL;
}

void sh4_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
{
    int i;

    for (i = 0; i < sizeof(sh4_defs) / sizeof(*sh4_defs); i++)
	(*cpu_fprintf)(f, "%s\n", sh4_defs[i].name);
}

static void cpu_sh4_register(CPUSH4State *env, const sh4_def_t *def)
{
    env->pvr = def->pvr;
    env->prr = def->prr;
    env->cvr = def->cvr;
    env->id = def->id;
}

CPUSH4State *cpu_sh4_init(const char *cpu_model)
{
    CPUSH4State *env;
    const sh4_def_t *def;

    def = cpu_sh4_find_by_name(cpu_model);
    if (!def)
	return NULL;
    env = qemu_mallocz(sizeof(CPUSH4State));
    if (!env)
	return NULL;
    cpu_exec_init(env);
    sh4_translate_init();
    env->cpu_model_str = cpu_model;
    cpu_sh4_reset(env);
    cpu_sh4_register(env, def);
    tlb_flush(env, 1);
    return env;
}

static void gen_goto_tb(DisasContext * ctx, int n, target_ulong dest)
{
    TranslationBlock *tb;
    tb = ctx->tb;

    if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
	!ctx->singlestep_enabled) {
	/* Use a direct jump if in same page and singlestep not enabled */
        tcg_gen_goto_tb(n);
        tcg_gen_movi_i32(cpu_pc, dest);
        tcg_gen_exit_tb((long) tb + n);
    } else {
        tcg_gen_movi_i32(cpu_pc, dest);
        if (ctx->singlestep_enabled)
            gen_helper_debug();
        tcg_gen_exit_tb(0);
    }
}

static void gen_jump(DisasContext * ctx)
{
    if (ctx->delayed_pc == (uint32_t) - 1) {
	/* Target is not statically known, it comes necessarily from a
	   delayed jump as immediate jump are conditinal jumps */
	tcg_gen_mov_i32(cpu_pc, cpu_delayed_pc);
	if (ctx->singlestep_enabled)
	    gen_helper_debug();
	tcg_gen_exit_tb(0);
    } else {
	gen_goto_tb(ctx, 0, ctx->delayed_pc);
    }
}

static inline void gen_branch_slot(uint32_t delayed_pc, int t)
{
    TCGv sr;
    int label = gen_new_label();
    tcg_gen_movi_i32(cpu_delayed_pc, delayed_pc);
    sr = tcg_temp_new();
    tcg_gen_andi_i32(sr, cpu_sr, SR_T);
    tcg_gen_brcondi_i32(TCG_COND_NE, sr, t ? SR_T : 0, label);
    tcg_gen_ori_i32(cpu_flags, cpu_flags, DELAY_SLOT_TRUE);
    gen_set_label(label);
}

/* Immediate conditional jump (bt or bf) */
static void gen_conditional_jump(DisasContext * ctx,
				 target_ulong ift, target_ulong ifnott)
{
    int l1;
    TCGv sr;

    l1 = gen_new_label();
    sr = tcg_temp_new();
    tcg_gen_andi_i32(sr, cpu_sr, SR_T);
    tcg_gen_brcondi_i32(TCG_COND_EQ, sr, SR_T, l1);
    gen_goto_tb(ctx, 0, ifnott);
    gen_set_label(l1);
    gen_goto_tb(ctx, 1, ift);
}

/* Delayed conditional jump (bt or bf) */
static void gen_delayed_conditional_jump(DisasContext * ctx)
{
    int l1;
    TCGv ds;

    l1 = gen_new_label();
    ds = tcg_temp_new();
    tcg_gen_andi_i32(ds, cpu_flags, DELAY_SLOT_TRUE);
    tcg_gen_brcondi_i32(TCG_COND_EQ, ds, DELAY_SLOT_TRUE, l1);
    gen_goto_tb(ctx, 1, ctx->pc + 2);
    gen_set_label(l1);
    tcg_gen_andi_i32(cpu_flags, cpu_flags, ~DELAY_SLOT_TRUE);
    gen_jump(ctx);
}

static inline void gen_set_t(void)
{
    tcg_gen_ori_i32(cpu_sr, cpu_sr, SR_T);
}

static inline void gen_clr_t(void)
{
    tcg_gen_andi_i32(cpu_sr, cpu_sr, ~SR_T);
}

static inline void gen_cmp(int cond, TCGv t0, TCGv t1)
{
    int label1 = gen_new_label();
    int label2 = gen_new_label();
    tcg_gen_brcond_i32(cond, t1, t0, label1);
    gen_clr_t();
    tcg_gen_br(label2);
    gen_set_label(label1);
    gen_set_t();
    gen_set_label(label2);
}

static inline void gen_cmp_imm(int cond, TCGv t0, int32_t imm)
{
    int label1 = gen_new_label();
    int label2 = gen_new_label();
    tcg_gen_brcondi_i32(cond, t0, imm, label1);
    gen_clr_t();
    tcg_gen_br(label2);
    gen_set_label(label1);
    gen_set_t();
    gen_set_label(label2);
}

static inline void gen_store_flags(uint32_t flags)
{
    tcg_gen_andi_i32(cpu_flags, cpu_flags, DELAY_SLOT_TRUE);
    tcg_gen_ori_i32(cpu_flags, cpu_flags, flags);
}

static inline void gen_copy_bit_i32(TCGv t0, int p0, TCGv t1, int p1)
{
    TCGv tmp = tcg_temp_new();

    p0 &= 0x1f;
    p1 &= 0x1f;

    tcg_gen_andi_i32(tmp, t1, (1 << p1));
    tcg_gen_andi_i32(t0, t0, ~(1 << p0));
    if (p0 < p1)
        tcg_gen_shri_i32(tmp, tmp, p1 - p0);
    else if (p0 > p1)
        tcg_gen_shli_i32(tmp, tmp, p0 - p1);
    tcg_gen_or_i32(t0, t0, tmp);

    tcg_temp_free(tmp);
}

static inline void gen_load_fpr64(TCGv_i64 t, int reg)
{
    tcg_gen_concat_i32_i64(t, cpu_fregs[reg + 1], cpu_fregs[reg]);
}

static inline void gen_store_fpr64 (TCGv_i64 t, int reg)
{
    TCGv_i32 tmp = tcg_temp_new_i32();
    tcg_gen_trunc_i64_i32(tmp, t);
    tcg_gen_mov_i32(cpu_fregs[reg + 1], tmp);
    tcg_gen_shri_i64(t, t, 32);
    tcg_gen_trunc_i64_i32(tmp, t);
    tcg_gen_mov_i32(cpu_fregs[reg], tmp);
    tcg_temp_free_i32(tmp);
}

#define B3_0 (ctx->opcode & 0xf)
#define B6_4 ((ctx->opcode >> 4) & 0x7)
#define B7_4 ((ctx->opcode >> 4) & 0xf)
#define B7_0 (ctx->opcode & 0xff)
#define B7_0s ((int32_t) (int8_t) (ctx->opcode & 0xff))
#define B11_0s (ctx->opcode & 0x800 ? 0xfffff000 | (ctx->opcode & 0xfff) : \
  (ctx->opcode & 0xfff))
#define B11_8 ((ctx->opcode >> 8) & 0xf)
#define B15_12 ((ctx->opcode >> 12) & 0xf)

#define REG(x) ((x) < 8 && (ctx->sr & (SR_MD | SR_RB)) == (SR_MD | SR_RB) ? \
		(cpu_gregs[x + 16]) : (cpu_gregs[x]))

#define ALTREG(x) ((x) < 8 && (ctx->sr & (SR_MD | SR_RB)) != (SR_MD | SR_RB) \
		? (cpu_gregs[x + 16]) : (cpu_gregs[x]))

#define FREG(x) (ctx->fpscr & FPSCR_FR ? (x) ^ 0x10 : (x))
#define XHACK(x) ((((x) & 1 ) << 4) | ((x) & 0xe))
#define XREG(x) (ctx->fpscr & FPSCR_FR ? XHACK(x) ^ 0x10 : XHACK(x))
#define DREG(x) FREG(x) /* Assumes lsb of (x) is always 0 */

#define CHECK_NOT_DELAY_SLOT \
  if (ctx->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL))     \
  {                                                           \
      tcg_gen_movi_i32(cpu_pc, ctx->pc-2);                    \
      gen_helper_raise_slot_illegal_instruction();            \
      ctx->bstate = BS_EXCP;                                  \
      return;                                                 \
  }

#define CHECK_PRIVILEGED                                      \
  if (IS_USER(ctx)) {                                         \
      tcg_gen_movi_i32(cpu_pc, ctx->pc);                      \
      gen_helper_raise_illegal_instruction();                 \
      ctx->bstate = BS_EXCP;                                  \
      return;                                                 \
  }

#define CHECK_FPU_ENABLED                                       \
  if (ctx->flags & SR_FD) {                                     \
      if (ctx->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) { \
          tcg_gen_movi_i32(cpu_pc, ctx->pc-2);                  \
          gen_helper_raise_slot_fpu_disable();                  \
      } else {                                                  \
          tcg_gen_movi_i32(cpu_pc, ctx->pc);                    \
          gen_helper_raise_fpu_disable();                       \
      }                                                         \
      ctx->bstate = BS_EXCP;                                    \
      return;                                                   \
  }

static void _decode_opc(DisasContext * ctx)
{
#if 0
    fprintf(stderr, "Translating opcode 0x%04x\n", ctx->opcode);
#endif

    switch (ctx->opcode) {
    case 0x0019:		/* div0u */
	tcg_gen_andi_i32(cpu_sr, cpu_sr, ~(SR_M | SR_Q | SR_T));
	return;
    case 0x000b:		/* rts */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_mov_i32(cpu_delayed_pc, cpu_pr);
	ctx->flags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x0028:		/* clrmac */
	tcg_gen_movi_i32(cpu_mach, 0);
	tcg_gen_movi_i32(cpu_macl, 0);
	return;
    case 0x0048:		/* clrs */
	tcg_gen_andi_i32(cpu_sr, cpu_sr, ~SR_S);
	return;
    case 0x0008:		/* clrt */
	gen_clr_t();
	return;
    case 0x0038:		/* ldtlb */
	CHECK_PRIVILEGED
	gen_helper_ldtlb();
	return;
    case 0x002b:		/* rte */
	CHECK_PRIVILEGED
	CHECK_NOT_DELAY_SLOT
	tcg_gen_mov_i32(cpu_sr, cpu_ssr);
	tcg_gen_mov_i32(cpu_delayed_pc, cpu_spc);
	ctx->flags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x0058:		/* sets */
	tcg_gen_ori_i32(cpu_sr, cpu_sr, SR_S);
	return;
    case 0x0018:		/* sett */
	gen_set_t();
	return;
    case 0xfbfd:		/* frchg */
	tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_FR);
	ctx->bstate = BS_STOP;
	return;
    case 0xf3fd:		/* fschg */
	tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_SZ);
	ctx->bstate = BS_STOP;
	return;
    case 0x0009:		/* nop */
	return;
    case 0x001b:		/* sleep */
	CHECK_PRIVILEGED
	gen_helper_sleep(tcg_const_i32(ctx->pc + 2));
	return;
    }

    switch (ctx->opcode & 0xf000) {
    case 0x1000:		/* mov.l Rm,@(disp,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B11_8), B3_0 * 4);
	    tcg_gen_qemu_st32(REG(B7_4), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x5000:		/* mov.l @(disp,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0 * 4);
	    tcg_gen_qemu_ld32s(REG(B11_8), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xe000:		/* mov #imm,Rn */
	tcg_gen_movi_i32(REG(B11_8), B7_0s);
	return;
    case 0x9000:		/* mov.w @(disp,PC),Rn */
	{
	    TCGv addr = tcg_const_i32(ctx->pc + 4 + B7_0 * 2);
	    tcg_gen_qemu_ld16s(REG(B11_8), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xd000:		/* mov.l @(disp,PC),Rn */
	{
	    TCGv addr = tcg_const_i32((ctx->pc + 4 + B7_0 * 4) & ~3);
	    tcg_gen_qemu_ld32s(REG(B11_8), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x7000:		/* add #imm,Rn */
	tcg_gen_addi_i32(REG(B11_8), REG(B11_8), B7_0s);
	return;
    case 0xa000:		/* bra disp */
	CHECK_NOT_DELAY_SLOT
	ctx->delayed_pc = ctx->pc + 4 + B11_0s * 2;
	tcg_gen_movi_i32(cpu_delayed_pc, ctx->delayed_pc);
	ctx->flags |= DELAY_SLOT;
	return;
    case 0xb000:		/* bsr disp */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_movi_i32(cpu_pr, ctx->pc + 4);
	ctx->delayed_pc = ctx->pc + 4 + B11_0s * 2;
	tcg_gen_movi_i32(cpu_delayed_pc, ctx->delayed_pc);
	ctx->flags |= DELAY_SLOT;
	return;
    }

    switch (ctx->opcode & 0xf00f) {
    case 0x6003:		/* mov Rm,Rn */
	tcg_gen_mov_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x2000:		/* mov.b Rm,@Rn */
	tcg_gen_qemu_st8(REG(B7_4), REG(B11_8), ctx->memidx);
	return;
    case 0x2001:		/* mov.w Rm,@Rn */
	tcg_gen_qemu_st16(REG(B7_4), REG(B11_8), ctx->memidx);
	return;
    case 0x2002:		/* mov.l Rm,@Rn */
	tcg_gen_qemu_st32(REG(B7_4), REG(B11_8), ctx->memidx);
	return;
    case 0x6000:		/* mov.b @Rm,Rn */
	tcg_gen_qemu_ld8s(REG(B11_8), REG(B7_4), ctx->memidx);
	return;
    case 0x6001:		/* mov.w @Rm,Rn */
	tcg_gen_qemu_ld16s(REG(B11_8), REG(B7_4), ctx->memidx);
	return;
    case 0x6002:		/* mov.l @Rm,Rn */
	tcg_gen_qemu_ld32s(REG(B11_8), REG(B7_4), ctx->memidx);
	return;
    case 0x2004:		/* mov.b Rm,@-Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 1);
	    tcg_gen_qemu_st8(REG(B7_4), addr, ctx->memidx);	/* might cause re-execution */
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 1);	/* modify register status */
	    tcg_temp_free(addr);
	}
	return;
    case 0x2005:		/* mov.w Rm,@-Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 2);
	    tcg_gen_qemu_st16(REG(B7_4), addr, ctx->memidx);
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 2);
	    tcg_temp_free(addr);
	}
	return;
    case 0x2006:		/* mov.l Rm,@-Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
	    tcg_gen_qemu_st32(REG(B7_4), addr, ctx->memidx);
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
    case 0x6004:		/* mov.b @Rm+,Rn */
	tcg_gen_qemu_ld8s(REG(B11_8), REG(B7_4), ctx->memidx);
	if ( B11_8 != B7_4 )
		tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 1);
	return;
    case 0x6005:		/* mov.w @Rm+,Rn */
	tcg_gen_qemu_ld16s(REG(B11_8), REG(B7_4), ctx->memidx);
	if ( B11_8 != B7_4 )
		tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 2);
	return;
    case 0x6006:		/* mov.l @Rm+,Rn */
	tcg_gen_qemu_ld32s(REG(B11_8), REG(B7_4), ctx->memidx);
	if ( B11_8 != B7_4 )
		tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 4);
	return;
    case 0x0004:		/* mov.b Rm,@(R0,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
	    tcg_gen_qemu_st8(REG(B7_4), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x0005:		/* mov.w Rm,@(R0,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
	    tcg_gen_qemu_st16(REG(B7_4), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x0006:		/* mov.l Rm,@(R0,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
	    tcg_gen_qemu_st32(REG(B7_4), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x000c:		/* mov.b @(R0,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
	    tcg_gen_qemu_ld8s(REG(B11_8), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x000d:		/* mov.w @(R0,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
	    tcg_gen_qemu_ld16s(REG(B11_8), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x000e:		/* mov.l @(R0,Rm),Rn */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
	    tcg_gen_qemu_ld32s(REG(B11_8), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x6008:		/* swap.b Rm,Rn */
	{
	    TCGv highw, high, low;
	    highw = tcg_temp_new();
	    tcg_gen_andi_i32(highw, REG(B7_4), 0xffff0000);
	    high = tcg_temp_new();
	    tcg_gen_ext8u_i32(high, REG(B7_4));
	    tcg_gen_shli_i32(high, high, 8);
	    low = tcg_temp_new();
	    tcg_gen_shri_i32(low, REG(B7_4), 8);
	    tcg_gen_ext8u_i32(low, low);
	    tcg_gen_or_i32(REG(B11_8), high, low);
	    tcg_gen_or_i32(REG(B11_8), REG(B11_8), highw);
	    tcg_temp_free(low);
	    tcg_temp_free(high);
	}
	return;
    case 0x6009:		/* swap.w Rm,Rn */
	{
	    TCGv high, low;
	    high = tcg_temp_new();
	    tcg_gen_ext16u_i32(high, REG(B7_4));
	    tcg_gen_shli_i32(high, high, 16);
	    low = tcg_temp_new();
	    tcg_gen_shri_i32(low, REG(B7_4), 16);
	    tcg_gen_ext16u_i32(low, low);
	    tcg_gen_or_i32(REG(B11_8), high, low);
	    tcg_temp_free(low);
	    tcg_temp_free(high);
	}
	return;
    case 0x200d:		/* xtrct Rm,Rn */
	{
	    TCGv high, low;
	    high = tcg_temp_new();
	    tcg_gen_ext16u_i32(high, REG(B7_4));
	    tcg_gen_shli_i32(high, high, 16);
	    low = tcg_temp_new();
	    tcg_gen_shri_i32(low, REG(B11_8), 16);
	    tcg_gen_ext16u_i32(low, low);
	    tcg_gen_or_i32(REG(B11_8), high, low);
	    tcg_temp_free(low);
	    tcg_temp_free(high);
	}
	return;
    case 0x300c:		/* add Rm,Rn */
	tcg_gen_add_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x300e:		/* addc Rm,Rn */
	gen_helper_addc(REG(B11_8), REG(B7_4), REG(B11_8));
	return;
    case 0x300f:		/* addv Rm,Rn */
	gen_helper_addv(REG(B11_8), REG(B7_4), REG(B11_8));
	return;
    case 0x2009:		/* and Rm,Rn */
	tcg_gen_and_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x3000:		/* cmp/eq Rm,Rn */
	gen_cmp(TCG_COND_EQ, REG(B7_4), REG(B11_8));
	return;
    case 0x3003:		/* cmp/ge Rm,Rn */
	gen_cmp(TCG_COND_GE, REG(B7_4), REG(B11_8));
	return;
    case 0x3007:		/* cmp/gt Rm,Rn */
	gen_cmp(TCG_COND_GT, REG(B7_4), REG(B11_8));
	return;
    case 0x3006:		/* cmp/hi Rm,Rn */
	gen_cmp(TCG_COND_GTU, REG(B7_4), REG(B11_8));
	return;
    case 0x3002:		/* cmp/hs Rm,Rn */
	gen_cmp(TCG_COND_GEU, REG(B7_4), REG(B11_8));
	return;
    case 0x200c:		/* cmp/str Rm,Rn */
	{
	    int label1 = gen_new_label();
	    int label2 = gen_new_label();
	    TCGv cmp1 = tcg_temp_local_new(TCG_TYPE_I32);
	    TCGv cmp2 = tcg_temp_local_new(TCG_TYPE_I32);
	    tcg_gen_xor_i32(cmp1, REG(B7_4), REG(B11_8));
	    tcg_gen_andi_i32(cmp2, cmp1, 0xff000000);
	    tcg_gen_brcondi_i32(TCG_COND_EQ, cmp2, 0, label1);
	    tcg_gen_andi_i32(cmp2, cmp1, 0x00ff0000);
	    tcg_gen_brcondi_i32(TCG_COND_EQ, cmp2, 0, label1);
	    tcg_gen_andi_i32(cmp2, cmp1, 0x0000ff00);
	    tcg_gen_brcondi_i32(TCG_COND_EQ, cmp2, 0, label1);
	    tcg_gen_andi_i32(cmp2, cmp1, 0x000000ff);
	    tcg_gen_brcondi_i32(TCG_COND_EQ, cmp2, 0, label1);
	    tcg_gen_andi_i32(cpu_sr, cpu_sr, ~SR_T);
	    tcg_gen_br(label2);
	    gen_set_label(label1);
	    tcg_gen_ori_i32(cpu_sr, cpu_sr, SR_T);
	    gen_set_label(label2);
	    tcg_temp_free(cmp2);
	    tcg_temp_free(cmp1);
	}
	return;
    case 0x2007:		/* div0s Rm,Rn */
	{
	    gen_copy_bit_i32(cpu_sr, 8, REG(B11_8), 31);	/* SR_Q */
	    gen_copy_bit_i32(cpu_sr, 9, REG(B7_4), 31);		/* SR_M */
	    TCGv val = tcg_temp_new();
	    tcg_gen_xor_i32(val, REG(B7_4), REG(B11_8));
	    gen_copy_bit_i32(cpu_sr, 0, val, 31);		/* SR_T */
	    tcg_temp_free(val);
	}
	return;
    case 0x3004:		/* div1 Rm,Rn */
	gen_helper_div1(REG(B11_8), REG(B7_4), REG(B11_8));
	return;
    case 0x300d:		/* dmuls.l Rm,Rn */
	{
	    TCGv_i64 tmp1 = tcg_temp_new_i64();
	    TCGv_i64 tmp2 = tcg_temp_new_i64();

	    tcg_gen_ext_i32_i64(tmp1, REG(B7_4));
	    tcg_gen_ext_i32_i64(tmp2, REG(B11_8));
	    tcg_gen_mul_i64(tmp1, tmp1, tmp2);
	    tcg_gen_trunc_i64_i32(cpu_macl, tmp1);
	    tcg_gen_shri_i64(tmp1, tmp1, 32);
	    tcg_gen_trunc_i64_i32(cpu_mach, tmp1);

	    tcg_temp_free_i64(tmp2);
	    tcg_temp_free_i64(tmp1);
	}
	return;
    case 0x3005:		/* dmulu.l Rm,Rn */
	{
	    TCGv_i64 tmp1 = tcg_temp_new_i64();
	    TCGv_i64 tmp2 = tcg_temp_new_i64();

	    tcg_gen_extu_i32_i64(tmp1, REG(B7_4));
	    tcg_gen_extu_i32_i64(tmp2, REG(B11_8));
	    tcg_gen_mul_i64(tmp1, tmp1, tmp2);
	    tcg_gen_trunc_i64_i32(cpu_macl, tmp1);
	    tcg_gen_shri_i64(tmp1, tmp1, 32);
	    tcg_gen_trunc_i64_i32(cpu_mach, tmp1);

	    tcg_temp_free_i64(tmp2);
	    tcg_temp_free_i64(tmp1);
	}
	return;
    case 0x600e:		/* exts.b Rm,Rn */
	tcg_gen_ext8s_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600f:		/* exts.w Rm,Rn */
	tcg_gen_ext16s_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600c:		/* extu.b Rm,Rn */
	tcg_gen_ext8u_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600d:		/* extu.w Rm,Rn */
	tcg_gen_ext16u_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x000f:		/* mac.l @Rm+,@Rn+ */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
	    tcg_gen_qemu_ld32s(arg0, REG(B7_4), ctx->memidx);
	    arg1 = tcg_temp_new();
	    tcg_gen_qemu_ld32s(arg1, REG(B11_8), ctx->memidx);
	    gen_helper_macl(arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 4);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
    case 0x400f:		/* mac.w @Rm+,@Rn+ */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
	    tcg_gen_qemu_ld32s(arg0, REG(B7_4), ctx->memidx);
	    arg1 = tcg_temp_new();
	    tcg_gen_qemu_ld32s(arg1, REG(B11_8), ctx->memidx);
	    gen_helper_macw(arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 2);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 2);
	}
	return;
    case 0x0007:		/* mul.l Rm,Rn */
	tcg_gen_mul_i32(cpu_macl, REG(B7_4), REG(B11_8));
	return;
    case 0x200f:		/* muls.w Rm,Rn */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
	    tcg_gen_ext16s_i32(arg0, REG(B7_4));
	    arg1 = tcg_temp_new();
	    tcg_gen_ext16s_i32(arg1, REG(B11_8));
	    tcg_gen_mul_i32(cpu_macl, arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	}
	return;
    case 0x200e:		/* mulu.w Rm,Rn */
	{
	    TCGv arg0, arg1;
	    arg0 = tcg_temp_new();
	    tcg_gen_ext16u_i32(arg0, REG(B7_4));
	    arg1 = tcg_temp_new();
	    tcg_gen_ext16u_i32(arg1, REG(B11_8));
	    tcg_gen_mul_i32(cpu_macl, arg0, arg1);
	    tcg_temp_free(arg1);
	    tcg_temp_free(arg0);
	}
	return;
    case 0x600b:		/* neg Rm,Rn */
	tcg_gen_neg_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x600a:		/* negc Rm,Rn */
	gen_helper_negc(REG(B11_8), REG(B7_4));
	return;
    case 0x6007:		/* not Rm,Rn */
	tcg_gen_not_i32(REG(B11_8), REG(B7_4));
	return;
    case 0x200b:		/* or Rm,Rn */
	tcg_gen_or_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x400c:		/* shad Rm,Rn */
	{
	    int label1 = gen_new_label();
	    int label2 = gen_new_label();
	    int label3 = gen_new_label();
	    int label4 = gen_new_label();
	    TCGv shift = tcg_temp_local_new(TCG_TYPE_I32);
	    tcg_gen_brcondi_i32(TCG_COND_LT, REG(B7_4), 0, label1);
	    /* Rm positive, shift to the left */
	    tcg_gen_andi_i32(shift, REG(B7_4), 0x1f);
	    tcg_gen_shl_i32(REG(B11_8), REG(B11_8), shift);
	    tcg_gen_br(label4);
	    /* Rm negative, shift to the right */
	    gen_set_label(label1);
	    tcg_gen_andi_i32(shift, REG(B7_4), 0x1f);
	    tcg_gen_brcondi_i32(TCG_COND_EQ, shift, 0, label2);
	    tcg_gen_not_i32(shift, REG(B7_4));
	    tcg_gen_andi_i32(shift, shift, 0x1f);
	    tcg_gen_addi_i32(shift, shift, 1);
	    tcg_gen_sar_i32(REG(B11_8), REG(B11_8), shift);
	    tcg_gen_br(label4);
	    /* Rm = -32 */
	    gen_set_label(label2);
	    tcg_gen_brcondi_i32(TCG_COND_LT, REG(B11_8), 0, label3);
	    tcg_gen_movi_i32(REG(B11_8), 0);
	    tcg_gen_br(label4);
	    gen_set_label(label3);
	    tcg_gen_movi_i32(REG(B11_8), 0xffffffff);
	    gen_set_label(label4);
	    tcg_temp_free(shift);
	}
	return;
    case 0x400d:		/* shld Rm,Rn */
	{
	    int label1 = gen_new_label();
	    int label2 = gen_new_label();
	    int label3 = gen_new_label();
	    TCGv shift = tcg_temp_local_new(TCG_TYPE_I32);
	    tcg_gen_brcondi_i32(TCG_COND_LT, REG(B7_4), 0, label1);
	    /* Rm positive, shift to the left */
	    tcg_gen_andi_i32(shift, REG(B7_4), 0x1f);
	    tcg_gen_shl_i32(REG(B11_8), REG(B11_8), shift);
	    tcg_gen_br(label3);
	    /* Rm negative, shift to the right */
	    gen_set_label(label1);
	    tcg_gen_andi_i32(shift, REG(B7_4), 0x1f);
	    tcg_gen_brcondi_i32(TCG_COND_EQ, shift, 0, label2);
	    tcg_gen_not_i32(shift, REG(B7_4));
	    tcg_gen_andi_i32(shift, shift, 0x1f);
	    tcg_gen_addi_i32(shift, shift, 1);
	    tcg_gen_shr_i32(REG(B11_8), REG(B11_8), shift);
	    tcg_gen_br(label3);
	    /* Rm = -32 */
	    gen_set_label(label2);
	    tcg_gen_movi_i32(REG(B11_8), 0);
	    gen_set_label(label3);
	    tcg_temp_free(shift);
	}
	return;
    case 0x3008:		/* sub Rm,Rn */
	tcg_gen_sub_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0x300a:		/* subc Rm,Rn */
	gen_helper_subc(REG(B11_8), REG(B7_4), REG(B11_8));
	return;
    case 0x300b:		/* subv Rm,Rn */
	gen_helper_subv(REG(B11_8), REG(B7_4), REG(B11_8));
	return;
    case 0x2008:		/* tst Rm,Rn */
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_and_i32(val, REG(B7_4), REG(B11_8));
	    gen_cmp_imm(TCG_COND_EQ, val, 0);
	    tcg_temp_free(val);
	}
	return;
    case 0x200a:		/* xor Rm,Rn */
	tcg_gen_xor_i32(REG(B11_8), REG(B11_8), REG(B7_4));
	return;
    case 0xf00c: /* fmov {F,D,X}Rm,{F,D,X}Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_SZ) {
	    TCGv_i64 fp = tcg_temp_new_i64();
	    gen_load_fpr64(fp, XREG(B7_4));
	    gen_store_fpr64(fp, XREG(B11_8));
	    tcg_temp_free_i64(fp);
	} else {
	    tcg_gen_mov_i32(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
	}
	return;
    case 0xf00a: /* fmov {F,D,X}Rm,@Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_SZ) {
	    TCGv addr_hi = tcg_temp_new();
	    int fr = XREG(B7_4);
	    tcg_gen_addi_i32(addr_hi, REG(B11_8), 4);
	    tcg_gen_qemu_st32(cpu_fregs[fr  ], REG(B11_8), ctx->memidx);
	    tcg_gen_qemu_st32(cpu_fregs[fr+1], addr_hi,	   ctx->memidx);
	    tcg_temp_free(addr_hi);
	} else {
	    tcg_gen_qemu_st32(cpu_fregs[FREG(B7_4)], REG(B11_8), ctx->memidx);
	}
	return;
    case 0xf008: /* fmov @Rm,{F,D,X}Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_SZ) {
	    TCGv addr_hi = tcg_temp_new();
	    int fr = XREG(B11_8);
	    tcg_gen_addi_i32(addr_hi, REG(B7_4), 4);
	    tcg_gen_qemu_ld32u(cpu_fregs[fr  ], REG(B7_4), ctx->memidx);
	    tcg_gen_qemu_ld32u(cpu_fregs[fr+1], addr_hi,   ctx->memidx);
	    tcg_temp_free(addr_hi);
	} else {
	    tcg_gen_qemu_ld32u(cpu_fregs[FREG(B11_8)], REG(B7_4), ctx->memidx);
	}
	return;
    case 0xf009: /* fmov @Rm+,{F,D,X}Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_SZ) {
	    TCGv addr_hi = tcg_temp_new();
	    int fr = XREG(B11_8);
	    tcg_gen_addi_i32(addr_hi, REG(B7_4), 4);
	    tcg_gen_qemu_ld32u(cpu_fregs[fr  ], REG(B7_4), ctx->memidx);
	    tcg_gen_qemu_ld32u(cpu_fregs[fr+1], addr_hi,   ctx->memidx);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 8);
	    tcg_temp_free(addr_hi);
	} else {
	    tcg_gen_qemu_ld32u(cpu_fregs[FREG(B11_8)], REG(B7_4), ctx->memidx);
	    tcg_gen_addi_i32(REG(B7_4), REG(B7_4), 4);
	}
	return;
    case 0xf00b: /* fmov {F,D,X}Rm,@-Rn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_SZ) {
	    TCGv addr = tcg_temp_new_i32();
	    int fr = XREG(B7_4);
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
	    tcg_gen_qemu_st32(cpu_fregs[fr+1], addr, ctx->memidx);
	    tcg_gen_subi_i32(addr, REG(B11_8), 8);
	    tcg_gen_qemu_st32(cpu_fregs[fr  ], addr, ctx->memidx);
	    tcg_gen_mov_i32(REG(B11_8), addr);
	    tcg_temp_free(addr);
	} else {
	    TCGv addr;
	    addr = tcg_temp_new_i32();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
	    tcg_gen_qemu_st32(cpu_fregs[FREG(B7_4)], addr, ctx->memidx);
	    tcg_temp_free(addr);
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
    case 0xf006: /* fmov @(R0,Rm),{F,D,X}Rm - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	{
	    TCGv addr = tcg_temp_new_i32();
	    tcg_gen_add_i32(addr, REG(B7_4), REG(0));
	    if (ctx->fpscr & FPSCR_SZ) {
		int fr = XREG(B11_8);
		tcg_gen_qemu_ld32u(cpu_fregs[fr	 ], addr, ctx->memidx);
		tcg_gen_addi_i32(addr, addr, 4);
		tcg_gen_qemu_ld32u(cpu_fregs[fr+1], addr, ctx->memidx);
	    } else {
		tcg_gen_qemu_ld32u(cpu_fregs[FREG(B11_8)], addr, ctx->memidx);
	    }
	    tcg_temp_free(addr);
	}
	return;
    case 0xf007: /* fmov {F,D,X}Rn,@(R0,Rn) - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(B11_8), REG(0));
	    if (ctx->fpscr & FPSCR_SZ) {
		int fr = XREG(B7_4);
		tcg_gen_qemu_ld32u(cpu_fregs[fr	 ], addr, ctx->memidx);
		tcg_gen_addi_i32(addr, addr, 4);
		tcg_gen_qemu_ld32u(cpu_fregs[fr+1], addr, ctx->memidx);
	    } else {
		tcg_gen_qemu_st32(cpu_fregs[FREG(B7_4)], addr, ctx->memidx);
	    }
	    tcg_temp_free(addr);
	}
	return;
    case 0xf000: /* fadd Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf001: /* fsub Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf002: /* fmul Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf003: /* fdiv Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
    case 0xf004: /* fcmp/eq Rm,Rn - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
    case 0xf005: /* fcmp/gt Rm,Rn - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
	{
	    CHECK_FPU_ENABLED
	    if (ctx->fpscr & FPSCR_PR) {
                TCGv_i64 fp0, fp1;

		if (ctx->opcode & 0x0110)
		    break; /* illegal instruction */
		fp0 = tcg_temp_new_i64();
		fp1 = tcg_temp_new_i64();
		gen_load_fpr64(fp0, DREG(B11_8));
		gen_load_fpr64(fp1, DREG(B7_4));
                switch (ctx->opcode & 0xf00f) {
                case 0xf000:		/* fadd Rm,Rn */
                    gen_helper_fadd_DT(fp0, fp0, fp1);
                    break;
                case 0xf001:		/* fsub Rm,Rn */
                    gen_helper_fsub_DT(fp0, fp0, fp1);
                    break;
                case 0xf002:		/* fmul Rm,Rn */
                    gen_helper_fmul_DT(fp0, fp0, fp1);
                    break;
                case 0xf003:		/* fdiv Rm,Rn */
                    gen_helper_fdiv_DT(fp0, fp0, fp1);
                    break;
                case 0xf004:		/* fcmp/eq Rm,Rn */
                    gen_helper_fcmp_eq_DT(fp0, fp1);
                    return;
                case 0xf005:		/* fcmp/gt Rm,Rn */
                    gen_helper_fcmp_gt_DT(fp0, fp1);
                    return;
                }
		gen_store_fpr64(fp0, DREG(B11_8));
                tcg_temp_free_i64(fp0);
                tcg_temp_free_i64(fp1);
	    } else {
                switch (ctx->opcode & 0xf00f) {
                case 0xf000:		/* fadd Rm,Rn */
                    gen_helper_fadd_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
                    break;
                case 0xf001:		/* fsub Rm,Rn */
                    gen_helper_fsub_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
                    break;
                case 0xf002:		/* fmul Rm,Rn */
                    gen_helper_fmul_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
                    break;
                case 0xf003:		/* fdiv Rm,Rn */
                    gen_helper_fdiv_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
                    break;
                case 0xf004:		/* fcmp/eq Rm,Rn */
                    gen_helper_fcmp_eq_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
                    return;
                case 0xf005:		/* fcmp/gt Rm,Rn */
                    gen_helper_fcmp_gt_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B7_4)]);
                    return;
                }
	    }
	}
	return;
    }

    switch (ctx->opcode & 0xff00) {
    case 0xc900:		/* and #imm,R0 */
	tcg_gen_andi_i32(REG(0), REG(0), B7_0);
	return;
    case 0xcd00:		/* and.b #imm,@(R0,GBR) */
	{
	    TCGv addr, val;
	    addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(0), cpu_gbr);
	    val = tcg_temp_new();
	    tcg_gen_qemu_ld8u(val, addr, ctx->memidx);
	    tcg_gen_andi_i32(val, val, B7_0);
	    tcg_gen_qemu_st8(val, addr, ctx->memidx);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8b00:		/* bf label */
	CHECK_NOT_DELAY_SLOT
	    gen_conditional_jump(ctx, ctx->pc + 2,
				 ctx->pc + 4 + B7_0s * 2);
	ctx->bstate = BS_BRANCH;
	return;
    case 0x8f00:		/* bf/s label */
	CHECK_NOT_DELAY_SLOT
	gen_branch_slot(ctx->delayed_pc = ctx->pc + 4 + B7_0s * 2, 0);
	ctx->flags |= DELAY_SLOT_CONDITIONAL;
	return;
    case 0x8900:		/* bt label */
	CHECK_NOT_DELAY_SLOT
	    gen_conditional_jump(ctx, ctx->pc + 4 + B7_0s * 2,
				 ctx->pc + 2);
	ctx->bstate = BS_BRANCH;
	return;
    case 0x8d00:		/* bt/s label */
	CHECK_NOT_DELAY_SLOT
	gen_branch_slot(ctx->delayed_pc = ctx->pc + 4 + B7_0s * 2, 1);
	ctx->flags |= DELAY_SLOT_CONDITIONAL;
	return;
    case 0x8800:		/* cmp/eq #imm,R0 */
	gen_cmp_imm(TCG_COND_EQ, REG(0), B7_0s);
	return;
    case 0xc400:		/* mov.b @(disp,GBR),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0);
	    tcg_gen_qemu_ld8s(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc500:		/* mov.w @(disp,GBR),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 2);
	    tcg_gen_qemu_ld16s(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc600:		/* mov.l @(disp,GBR),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 4);
	    tcg_gen_qemu_ld32s(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc000:		/* mov.b R0,@(disp,GBR) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0);
	    tcg_gen_qemu_st8(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc100:		/* mov.w R0,@(disp,GBR) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 2);
	    tcg_gen_qemu_st16(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc200:		/* mov.l R0,@(disp,GBR) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, cpu_gbr, B7_0 * 4);
	    tcg_gen_qemu_st32(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8000:		/* mov.b R0,@(disp,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0);
	    tcg_gen_qemu_st8(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8100:		/* mov.w R0,@(disp,Rn) */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0 * 2);
	    tcg_gen_qemu_st16(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8400:		/* mov.b @(disp,Rn),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0);
	    tcg_gen_qemu_ld8s(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0x8500:		/* mov.w @(disp,Rn),R0 */
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_addi_i32(addr, REG(B7_4), B3_0 * 2);
	    tcg_gen_qemu_ld16s(REG(0), addr, ctx->memidx);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc700:		/* mova @(disp,PC),R0 */
	tcg_gen_movi_i32(REG(0), ((ctx->pc & 0xfffffffc) + 4 + B7_0 * 4) & ~3);
	return;
    case 0xcb00:		/* or #imm,R0 */
	tcg_gen_ori_i32(REG(0), REG(0), B7_0);
	return;
    case 0xcf00:		/* or.b #imm,@(R0,GBR) */
	{
	    TCGv addr, val;
	    addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(0), cpu_gbr);
	    val = tcg_temp_new();
	    tcg_gen_qemu_ld8u(val, addr, ctx->memidx);
	    tcg_gen_ori_i32(val, val, B7_0);
	    tcg_gen_qemu_st8(val, addr, ctx->memidx);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    case 0xc300:		/* trapa #imm */
	{
	    TCGv imm;
	    CHECK_NOT_DELAY_SLOT
	    tcg_gen_movi_i32(cpu_pc, ctx->pc);
	    imm = tcg_const_i32(B7_0);
	    gen_helper_trapa(imm);
	    tcg_temp_free(imm);
	    ctx->bstate = BS_BRANCH;
	}
	return;
    case 0xc800:		/* tst #imm,R0 */
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_andi_i32(val, REG(0), B7_0);
	    gen_cmp_imm(TCG_COND_EQ, val, 0);
	    tcg_temp_free(val);
	}
	return;
    case 0xcc00:		/* tst.b #imm,@(R0,GBR) */
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_add_i32(val, REG(0), cpu_gbr);
	    tcg_gen_qemu_ld8u(val, val, ctx->memidx);
	    tcg_gen_andi_i32(val, val, B7_0);
	    gen_cmp_imm(TCG_COND_EQ, val, 0);
	    tcg_temp_free(val);
	}
	return;
    case 0xca00:		/* xor #imm,R0 */
	tcg_gen_xori_i32(REG(0), REG(0), B7_0);
	return;
    case 0xce00:		/* xor.b #imm,@(R0,GBR) */
	{
	    TCGv addr, val;
	    addr = tcg_temp_new();
	    tcg_gen_add_i32(addr, REG(0), cpu_gbr);
	    val = tcg_temp_new();
	    tcg_gen_qemu_ld8u(val, addr, ctx->memidx);
	    tcg_gen_xori_i32(val, val, B7_0);
	    tcg_gen_qemu_st8(val, addr, ctx->memidx);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    }

    switch (ctx->opcode & 0xf08f) {
    case 0x408e:		/* ldc Rm,Rn_BANK */
	CHECK_PRIVILEGED
	tcg_gen_mov_i32(ALTREG(B6_4), REG(B11_8));
	return;
    case 0x4087:		/* ldc.l @Rm+,Rn_BANK */
	CHECK_PRIVILEGED
	tcg_gen_qemu_ld32s(ALTREG(B6_4), REG(B11_8), ctx->memidx);
	tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	return;
    case 0x0082:		/* stc Rm_BANK,Rn */
	CHECK_PRIVILEGED
	tcg_gen_mov_i32(REG(B11_8), ALTREG(B6_4));
	return;
    case 0x4083:		/* stc.l Rm_BANK,@-Rn */
	CHECK_PRIVILEGED
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
	    tcg_gen_qemu_st32(ALTREG(B6_4), addr, ctx->memidx);
	    tcg_temp_free(addr);
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
    }

    switch (ctx->opcode & 0xf0ff) {
    case 0x0023:		/* braf Rn */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_addi_i32(cpu_delayed_pc, REG(B11_8), ctx->pc + 4);
	ctx->flags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x0003:		/* bsrf Rn */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_movi_i32(cpu_pr, ctx->pc + 4);
	tcg_gen_add_i32(cpu_delayed_pc, REG(B11_8), cpu_pr);
	ctx->flags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x4015:		/* cmp/pl Rn */
	gen_cmp_imm(TCG_COND_GT, REG(B11_8), 0);
	return;
    case 0x4011:		/* cmp/pz Rn */
	gen_cmp_imm(TCG_COND_GE, REG(B11_8), 0);
	return;
    case 0x4010:		/* dt Rn */
	tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 1);
	gen_cmp_imm(TCG_COND_EQ, REG(B11_8), 0);
	return;
    case 0x402b:		/* jmp @Rn */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_mov_i32(cpu_delayed_pc, REG(B11_8));
	ctx->flags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x400b:		/* jsr @Rn */
	CHECK_NOT_DELAY_SLOT
	tcg_gen_movi_i32(cpu_pr, ctx->pc + 4);
	tcg_gen_mov_i32(cpu_delayed_pc, REG(B11_8));
	ctx->flags |= DELAY_SLOT;
	ctx->delayed_pc = (uint32_t) - 1;
	return;
    case 0x400e:		/* ldc Rm,SR */
	CHECK_PRIVILEGED
	tcg_gen_andi_i32(cpu_sr, REG(B11_8), 0x700083f3);
	ctx->bstate = BS_STOP;
	return;
    case 0x4007:		/* ldc.l @Rm+,SR */
	CHECK_PRIVILEGED
	{
	    TCGv val = tcg_temp_new();
	    tcg_gen_qemu_ld32s(val, REG(B11_8), ctx->memidx);
	    tcg_gen_andi_i32(cpu_sr, val, 0x700083f3);
	    tcg_temp_free(val);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	    ctx->bstate = BS_STOP;
	}
	return;
    case 0x0002:		/* stc SR,Rn */
	CHECK_PRIVILEGED
	tcg_gen_mov_i32(REG(B11_8), cpu_sr);
	return;
    case 0x4003:		/* stc SR,@-Rn */
	CHECK_PRIVILEGED
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
	    tcg_gen_qemu_st32(cpu_sr, addr, ctx->memidx);
	    tcg_temp_free(addr);
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
#define LDST(reg,ldnum,ldpnum,stnum,stpnum,prechk)		\
  case ldnum:							\
    prechk    							\
    tcg_gen_mov_i32 (cpu_##reg, REG(B11_8));			\
    return;							\
  case ldpnum:							\
    prechk    							\
    tcg_gen_qemu_ld32s (cpu_##reg, REG(B11_8), ctx->memidx);	\
    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);		\
    return;							\
  case stnum:							\
    prechk    							\
    tcg_gen_mov_i32 (REG(B11_8), cpu_##reg);			\
    return;							\
  case stpnum:							\
    prechk    							\
    {								\
	TCGv addr = tcg_temp_new();			\
	tcg_gen_subi_i32(addr, REG(B11_8), 4);			\
	tcg_gen_qemu_st32 (cpu_##reg, addr, ctx->memidx);	\
	tcg_temp_free(addr);					\
	tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 4);		\
    }								\
    return;
	LDST(gbr,  0x401e, 0x4017, 0x0012, 0x4013, {})
	LDST(vbr,  0x402e, 0x4027, 0x0022, 0x4023, CHECK_PRIVILEGED)
	LDST(ssr,  0x403e, 0x4037, 0x0032, 0x4033, CHECK_PRIVILEGED)
	LDST(spc,  0x404e, 0x4047, 0x0042, 0x4043, CHECK_PRIVILEGED)
	LDST(dbr,  0x40fa, 0x40f6, 0x00fa, 0x40f2, CHECK_PRIVILEGED)
	LDST(mach, 0x400a, 0x4006, 0x000a, 0x4002, {})
	LDST(macl, 0x401a, 0x4016, 0x001a, 0x4012, {})
	LDST(pr,   0x402a, 0x4026, 0x002a, 0x4022, {})
	LDST(fpul, 0x405a, 0x4056, 0x005a, 0x4052, {CHECK_FPU_ENABLED})
    case 0x406a:		/* lds Rm,FPSCR */
	CHECK_FPU_ENABLED
	gen_helper_ld_fpscr(REG(B11_8));
	ctx->bstate = BS_STOP;
	return;
    case 0x4066:		/* lds.l @Rm+,FPSCR */
	CHECK_FPU_ENABLED
	{
	    TCGv addr = tcg_temp_new();
	    tcg_gen_qemu_ld32s(addr, REG(B11_8), ctx->memidx);
	    tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	    gen_helper_ld_fpscr(addr);
	    tcg_temp_free(addr);
	    ctx->bstate = BS_STOP;
	}
	return;
    case 0x006a:		/* sts FPSCR,Rn */
	CHECK_FPU_ENABLED
	tcg_gen_andi_i32(REG(B11_8), cpu_fpscr, 0x003fffff);
	return;
    case 0x4062:		/* sts FPSCR,@-Rn */
	CHECK_FPU_ENABLED
	{
	    TCGv addr, val;
	    val = tcg_temp_new();
	    tcg_gen_andi_i32(val, cpu_fpscr, 0x003fffff);
	    addr = tcg_temp_new();
	    tcg_gen_subi_i32(addr, REG(B11_8), 4);
	    tcg_gen_qemu_st32(val, addr, ctx->memidx);
	    tcg_temp_free(addr);
	    tcg_temp_free(val);
	    tcg_gen_subi_i32(REG(B11_8), REG(B11_8), 4);
	}
	return;
    case 0x00c3:		/* movca.l R0,@Rm */
	tcg_gen_qemu_st32(REG(0), REG(B11_8), ctx->memidx);
	return;
    case 0x40a9:
	/* MOVUA.L @Rm,R0 (Rm) -> R0
	   Load non-boundary-aligned data */
	tcg_gen_qemu_ld32u(REG(0), REG(B11_8), ctx->memidx);
	return;
    case 0x40e9:
	/* MOVUA.L @Rm+,R0   (Rm) -> R0, Rm + 4 -> Rm
	   Load non-boundary-aligned data */
	tcg_gen_qemu_ld32u(REG(0), REG(B11_8), ctx->memidx);
	tcg_gen_addi_i32(REG(B11_8), REG(B11_8), 4);
	return;
    case 0x0029:		/* movt Rn */
	tcg_gen_andi_i32(REG(B11_8), cpu_sr, SR_T);
	return;
    case 0x0093:		/* ocbi @Rn */
	{
	    TCGv dummy = tcg_temp_new();
	    tcg_gen_qemu_ld32s(dummy, REG(B11_8), ctx->memidx);
	    tcg_temp_free(dummy);
	}
	return;
    case 0x00a3:		/* ocbp @Rn */
	{
	    TCGv dummy = tcg_temp_new();
	    tcg_gen_qemu_ld32s(dummy, REG(B11_8), ctx->memidx);
	    tcg_temp_free(dummy);
	}
	return;
    case 0x00b3:		/* ocbwb @Rn */
	{
	    TCGv dummy = tcg_temp_new();
	    tcg_gen_qemu_ld32s(dummy, REG(B11_8), ctx->memidx);
	    tcg_temp_free(dummy);
	}
	return;
    case 0x0083:		/* pref @Rn */
	return;
    case 0x4024:		/* rotcl Rn */
	{
	    TCGv tmp = tcg_temp_new();
	    tcg_gen_mov_i32(tmp, cpu_sr);
	    gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 31);
	    tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 1);
	    gen_copy_bit_i32(REG(B11_8), 0, tmp, 0);
	    tcg_temp_free(tmp);
	}
	return;
    case 0x4025:		/* rotcr Rn */
	{
	    TCGv tmp = tcg_temp_new();
	    tcg_gen_mov_i32(tmp, cpu_sr);
	    gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 0);
	    tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 1);
	    gen_copy_bit_i32(REG(B11_8), 31, tmp, 0);
	    tcg_temp_free(tmp);
	}
	return;
    case 0x4004:		/* rotl Rn */
	gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 31);
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 1);
	gen_copy_bit_i32(REG(B11_8), 0, cpu_sr, 0);
	return;
    case 0x4005:		/* rotr Rn */
	gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 0);
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 1);
	gen_copy_bit_i32(REG(B11_8), 31, cpu_sr, 0);
	return;
    case 0x4000:		/* shll Rn */
    case 0x4020:		/* shal Rn */
	gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 31);
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4021:		/* shar Rn */
	gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 0);
	tcg_gen_sari_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4001:		/* shlr Rn */
	gen_copy_bit_i32(cpu_sr, 0, REG(B11_8), 0);
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 1);
	return;
    case 0x4008:		/* shll2 Rn */
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 2);
	return;
    case 0x4018:		/* shll8 Rn */
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 8);
	return;
    case 0x4028:		/* shll16 Rn */
	tcg_gen_shli_i32(REG(B11_8), REG(B11_8), 16);
	return;
    case 0x4009:		/* shlr2 Rn */
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 2);
	return;
    case 0x4019:		/* shlr8 Rn */
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 8);
	return;
    case 0x4029:		/* shlr16 Rn */
	tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 16);
	return;
    case 0x401b:		/* tas.b @Rn */
	{
	    TCGv addr, val;
	    addr = tcg_temp_local_new(TCG_TYPE_I32);
	    tcg_gen_mov_i32(addr, REG(B11_8));
	    val = tcg_temp_local_new(TCG_TYPE_I32);
	    tcg_gen_qemu_ld8u(val, addr, ctx->memidx);
	    gen_cmp_imm(TCG_COND_EQ, val, 0);
	    tcg_gen_ori_i32(val, val, 0x80);
	    tcg_gen_qemu_st8(val, addr, ctx->memidx);
	    tcg_temp_free(val);
	    tcg_temp_free(addr);
	}
	return;
    case 0xf00d: /* fsts FPUL,FRn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	tcg_gen_mov_i32(cpu_fregs[FREG(B11_8)], cpu_fpul);
	return;
    case 0xf01d: /* flds FRm,FPUL - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	tcg_gen_mov_i32(cpu_fpul, cpu_fregs[FREG(B11_8)]);
	return;
    case 0xf02d: /* float FPUL,FRn/DRn - FPSCR: R[PR,Enable.I]/W[Cause,Flag] */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_PR) {
	    TCGv_i64 fp;
	    if (ctx->opcode & 0x0100)
		break; /* illegal instruction */
	    fp = tcg_temp_new_i64();
	    gen_helper_float_DT(fp, cpu_fpul);
	    gen_store_fpr64(fp, DREG(B11_8));
	    tcg_temp_free_i64(fp);
	}
	else {
	    gen_helper_float_FT(cpu_fregs[FREG(B11_8)], cpu_fpul);
	}
	return;
    case 0xf03d: /* ftrc FRm/DRm,FPUL - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_PR) {
	    TCGv_i64 fp;
	    if (ctx->opcode & 0x0100)
		break; /* illegal instruction */
	    fp = tcg_temp_new_i64();
	    gen_load_fpr64(fp, DREG(B11_8));
	    gen_helper_ftrc_DT(cpu_fpul, fp);
	    tcg_temp_free_i64(fp);
	}
	else {
	    gen_helper_ftrc_FT(cpu_fpul, cpu_fregs[FREG(B11_8)]);
	}
	return;
    case 0xf04d: /* fneg FRn/DRn - FPSCR: Nothing */
	CHECK_FPU_ENABLED
	{
	    gen_helper_fneg_T(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)]);
	}
	return;
    case 0xf05d: /* fabs FRn/DRn */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_PR) {
	    if (ctx->opcode & 0x0100)
		break; /* illegal instruction */
	    TCGv_i64 fp = tcg_temp_new_i64();
	    gen_load_fpr64(fp, DREG(B11_8));
	    gen_helper_fabs_DT(fp, fp);
	    gen_store_fpr64(fp, DREG(B11_8));
	    tcg_temp_free_i64(fp);
	} else {
	    gen_helper_fabs_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)]);
	}
	return;
    case 0xf06d: /* fsqrt FRn */
	CHECK_FPU_ENABLED
	if (ctx->fpscr & FPSCR_PR) {
	    if (ctx->opcode & 0x0100)
		break; /* illegal instruction */
	    TCGv_i64 fp = tcg_temp_new_i64();
	    gen_load_fpr64(fp, DREG(B11_8));
	    gen_helper_fsqrt_DT(fp, fp);
	    gen_store_fpr64(fp, DREG(B11_8));
	    tcg_temp_free_i64(fp);
	} else {
	    gen_helper_fsqrt_FT(cpu_fregs[FREG(B11_8)], cpu_fregs[FREG(B11_8)]);
	}
	return;
    case 0xf07d: /* fsrra FRn */
	CHECK_FPU_ENABLED
	break;
    case 0xf08d: /* fldi0 FRn - FPSCR: R[PR] */
	CHECK_FPU_ENABLED
	if (!(ctx->fpscr & FPSCR_PR)) {
	    tcg_gen_movi_i32(cpu_fregs[FREG(B11_8)], 0);
	}
	return;
    case 0xf09d: /* fldi1 FRn - FPSCR: R[PR] */
	CHECK_FPU_ENABLED
	if (!(ctx->fpscr & FPSCR_PR)) {
	    tcg_gen_movi_i32(cpu_fregs[FREG(B11_8)], 0x3f800000);
	}
	return;
    case 0xf0ad: /* fcnvsd FPUL,DRn */
	CHECK_FPU_ENABLED
	{
	    TCGv_i64 fp = tcg_temp_new_i64();
	    gen_helper_fcnvsd_FT_DT(fp, cpu_fpul);
	    gen_store_fpr64(fp, DREG(B11_8));
	    tcg_temp_free_i64(fp);
	}
	return;
    case 0xf0bd: /* fcnvds DRn,FPUL */
	CHECK_FPU_ENABLED
	{
	    TCGv_i64 fp = tcg_temp_new_i64();
	    gen_load_fpr64(fp, DREG(B11_8));
	    gen_helper_fcnvds_DT_FT(cpu_fpul, fp);
	    tcg_temp_free_i64(fp);
	}
	return;
    }

    fprintf(stderr, "unknown instruction 0x%04x at pc 0x%08x\n",
	    ctx->opcode, ctx->pc);
    gen_helper_raise_illegal_instruction();
    ctx->bstate = BS_EXCP;
}

static void decode_opc(DisasContext * ctx)
{
    uint32_t old_flags = ctx->flags;

    _decode_opc(ctx);

    if (old_flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
        if (ctx->flags & DELAY_SLOT_CLEARME) {
            gen_store_flags(0);
        } else {
	    /* go out of the delay slot */
	    uint32_t new_flags = ctx->flags;
	    new_flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL);
	    gen_store_flags(new_flags);
        }
        ctx->flags = 0;
        ctx->bstate = BS_BRANCH;
        if (old_flags & DELAY_SLOT_CONDITIONAL) {
	    gen_delayed_conditional_jump(ctx);
        } else if (old_flags & DELAY_SLOT) {
            gen_jump(ctx);
	}

    }

    /* go into a delay slot */
    if (ctx->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL))
        gen_store_flags(ctx->flags);
}

static inline void
gen_intermediate_code_internal(CPUState * env, TranslationBlock * tb,
                               int search_pc)
{
    DisasContext ctx;
    target_ulong pc_start;
    static uint16_t *gen_opc_end;
    CPUBreakpoint *bp;
    int i, ii;
    int num_insns;
    int max_insns;

    pc_start = tb->pc;
    gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
    ctx.pc = pc_start;
    ctx.flags = (uint32_t)tb->flags;
    ctx.bstate = BS_NONE;
    ctx.sr = env->sr;
    ctx.fpscr = env->fpscr;
    ctx.memidx = (env->sr & SR_MD) ? 1 : 0;
    /* We don't know if the delayed pc came from a dynamic or static branch,
       so assume it is a dynamic branch.  */
    ctx.delayed_pc = -1; /* use delayed pc from env pointer */
    ctx.tb = tb;
    ctx.singlestep_enabled = env->singlestep_enabled;

#ifdef DEBUG_DISAS
    if (loglevel & CPU_LOG_TB_CPU) {
	fprintf(logfile,
		"------------------------------------------------\n");
	cpu_dump_state(env, logfile, fprintf, 0);
    }
#endif

    ii = -1;
    num_insns = 0;
    max_insns = tb->cflags & CF_COUNT_MASK;
    if (max_insns == 0)
        max_insns = CF_COUNT_MASK;
    gen_icount_start();
    while (ctx.bstate == BS_NONE && gen_opc_ptr < gen_opc_end) {
        if (unlikely(!TAILQ_EMPTY(&env->breakpoints))) {
            TAILQ_FOREACH(bp, &env->breakpoints, entry) {
                if (ctx.pc == bp->pc) {
		    /* We have hit a breakpoint - make sure PC is up-to-date */
		    tcg_gen_movi_i32(cpu_pc, ctx.pc);
		    gen_helper_debug();
		    ctx.bstate = BS_EXCP;
		    break;
		}
	    }
	}
        if (search_pc) {
            i = gen_opc_ptr - gen_opc_buf;
            if (ii < i) {
                ii++;
                while (ii < i)
                    gen_opc_instr_start[ii++] = 0;
            }
            gen_opc_pc[ii] = ctx.pc;
            gen_opc_hflags[ii] = ctx.flags;
            gen_opc_instr_start[ii] = 1;
            gen_opc_icount[ii] = num_insns;
        }
        if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO))
            gen_io_start();
#if 0
	fprintf(stderr, "Loading opcode at address 0x%08x\n", ctx.pc);
	fflush(stderr);
#endif
	ctx.opcode = lduw_code(ctx.pc);
	decode_opc(&ctx);
        num_insns++;
	ctx.pc += 2;
	if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0)
	    break;
	if (env->singlestep_enabled)
	    break;
        if (num_insns >= max_insns)
            break;
#ifdef SH4_SINGLE_STEP
	break;
#endif
    }
    if (tb->cflags & CF_LAST_IO)
        gen_io_end();
    if (env->singlestep_enabled) {
        tcg_gen_movi_i32(cpu_pc, ctx.pc);
        gen_helper_debug();
    } else {
	switch (ctx.bstate) {
        case BS_STOP:
            /* gen_op_interrupt_restart(); */
            /* fall through */
        case BS_NONE:
            if (ctx.flags) {
                gen_store_flags(ctx.flags | DELAY_SLOT_CLEARME);
	    }
            gen_goto_tb(&ctx, 0, ctx.pc);
            break;
        case BS_EXCP:
            /* gen_op_interrupt_restart(); */
            tcg_gen_exit_tb(0);
            break;
        case BS_BRANCH:
        default:
            break;
	}
    }

    gen_icount_end(tb, num_insns);
    *gen_opc_ptr = INDEX_op_end;
    if (search_pc) {
        i = gen_opc_ptr - gen_opc_buf;
        ii++;
        while (ii <= i)
            gen_opc_instr_start[ii++] = 0;
    } else {
        tb->size = ctx.pc - pc_start;
        tb->icount = num_insns;
    }

#ifdef DEBUG_DISAS
#ifdef SH4_DEBUG_DISAS
    if (loglevel & CPU_LOG_TB_IN_ASM)
	fprintf(logfile, "\n");
#endif
    if (loglevel & CPU_LOG_TB_IN_ASM) {
	fprintf(logfile, "IN:\n");	/* , lookup_symbol(pc_start)); */
	target_disas(logfile, pc_start, ctx.pc - pc_start, 0);
	fprintf(logfile, "\n");
    }
#endif
}

void gen_intermediate_code(CPUState * env, struct TranslationBlock *tb)
{
    gen_intermediate_code_internal(env, tb, 0);
}

void gen_intermediate_code_pc(CPUState * env, struct TranslationBlock *tb)
{
    gen_intermediate_code_internal(env, tb, 1);
}

void gen_pc_load(CPUState *env, TranslationBlock *tb,
                unsigned long searched_pc, int pc_pos, void *puc)
{
    env->pc = gen_opc_pc[pc_pos];
    env->flags = gen_opc_hflags[pc_pos];
}