/*
 *  CRIS emulation for qemu: main translation routines.
 *
 *  Copyright (c) 2008 AXIS Communications AB
 *  Written by Edgar E. Iglesias.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

/*
 * FIXME:
 * The condition code translation is in need of attention.
 */

#include "cpu.h"
#include "disas.h"
#include "tcg-op.h"
#include "helper.h"
#include "mmu.h"
#include "crisv32-decode.h"

#define GEN_HELPER 1
#include "helper.h"

#define DISAS_CRIS 0
#if DISAS_CRIS
#  define LOG_DIS(...) qemu_log_mask(CPU_LOG_TB_IN_ASM, ## __VA_ARGS__)
#else
#  define LOG_DIS(...) do { } while (0)
#endif

#define D(x)
#define BUG() (gen_BUG(dc, __FILE__, __LINE__))
#define BUG_ON(x) ({if (x) BUG();})

#define DISAS_SWI 5

/* Used by the decoder.  */
#define EXTRACT_FIELD(src, start, end) \
            (((src) >> start) & ((1 << (end - start + 1)) - 1))

#define CC_MASK_NZ 0xc
#define CC_MASK_NZV 0xe
#define CC_MASK_NZVC 0xf
#define CC_MASK_RNZV 0x10e

static TCGv_ptr cpu_env;
static TCGv cpu_R[16];
static TCGv cpu_PR[16];
static TCGv cc_x;
static TCGv cc_src;
static TCGv cc_dest;
static TCGv cc_result;
static TCGv cc_op;
static TCGv cc_size;
static TCGv cc_mask;

static TCGv env_btaken;
static TCGv env_btarget;
static TCGv env_pc;

#include "gen-icount.h"

/* This is the state at translation time.  */
typedef struct DisasContext {
        CPUCRISState *env;
        target_ulong pc, ppc;

        /* Decoder.  */
        unsigned int (*decoder)(struct DisasContext *dc);
        uint32_t ir;
        uint32_t opcode;
        unsigned int op1;
        unsigned int op2;
        unsigned int zsize, zzsize;
        unsigned int mode;
        unsigned int postinc;

        unsigned int size;
        unsigned int src;
        unsigned int dst;
        unsigned int cond;

        int update_cc;
        int cc_op;
        int cc_size;
        uint32_t cc_mask;

        int cc_size_uptodate; /* -1 invalid or last written value.  */

        int cc_x_uptodate;  /* 1 - ccs, 2 - known | X_FLAG. 0 not uptodate.  */
        int flags_uptodate; /* Wether or not $ccs is uptodate.  */
        int flagx_known; /* Wether or not flags_x has the x flag known at
                            translation time.  */
        int flags_x;

        int clear_x; /* Clear x after this insn?  */
        int clear_prefix; /* Clear prefix after this insn?  */
        int clear_locked_irq; /* Clear the irq lockout.  */
        int cpustate_changed;
        unsigned int tb_flags; /* tb dependent flags.  */
        int is_jmp;

#define JMP_NOJMP     0
#define JMP_DIRECT    1
#define JMP_DIRECT_CC 2
#define JMP_INDIRECT  3
        int jmp; /* 0=nojmp, 1=direct, 2=indirect.  */ 
        uint32_t jmp_pc;

        int delayed_branch;

        struct TranslationBlock *tb;
        int singlestep_enabled;
} DisasContext;

static void gen_BUG(DisasContext *dc, const char *file, int line)
{
        printf ("BUG: pc=%x %s %d\n", dc->pc, file, line);
        qemu_log("BUG: pc=%x %s %d\n", dc->pc, file, line);
        cpu_abort(dc->env, "%s:%d\n", file, line);
}

static const char *regnames[] =
{
        "$r0", "$r1", "$r2", "$r3",
        "$r4", "$r5", "$r6", "$r7",
        "$r8", "$r9", "$r10", "$r11",
        "$r12", "$r13", "$sp", "$acr",
};
static const char *pregnames[] =
{
        "$bz", "$vr", "$pid", "$srs",
        "$wz", "$exs", "$eda", "$mof",
        "$dz", "$ebp", "$erp", "$srp",
        "$nrp", "$ccs", "$usp", "$spc",
};

/* We need this table to handle preg-moves with implicit width.  */
static int preg_sizes[] = {
        1, /* bz.  */
        1, /* vr.  */
        4, /* pid.  */
        1, /* srs.  */
        2, /* wz.  */
        4, 4, 4,
        4, 4, 4, 4,
        4, 4, 4, 4,
};

#define t_gen_mov_TN_env(tn, member) \
 _t_gen_mov_TN_env((tn), offsetof(CPUCRISState, member))
#define t_gen_mov_env_TN(member, tn) \
 _t_gen_mov_env_TN(offsetof(CPUCRISState, member), (tn))

static inline void t_gen_mov_TN_reg(TCGv tn, int r)
{
        if (r < 0 || r > 15)
                fprintf(stderr, "wrong register read $r%d\n", r);
        tcg_gen_mov_tl(tn, cpu_R[r]);
}
static inline void t_gen_mov_reg_TN(int r, TCGv tn)
{
        if (r < 0 || r > 15)
                fprintf(stderr, "wrong register write $r%d\n", r);
        tcg_gen_mov_tl(cpu_R[r], tn);
}

static inline void _t_gen_mov_TN_env(TCGv tn, int offset)
{
        if (offset > sizeof (CPUCRISState))
                fprintf(stderr, "wrong load from env from off=%d\n", offset);
        tcg_gen_ld_tl(tn, cpu_env, offset);
}
static inline void _t_gen_mov_env_TN(int offset, TCGv tn)
{
        if (offset > sizeof (CPUCRISState))
                fprintf(stderr, "wrong store to env at off=%d\n", offset);
        tcg_gen_st_tl(tn, cpu_env, offset);
}

static inline void t_gen_mov_TN_preg(TCGv tn, int r)
{
        if (r < 0 || r > 15)
                fprintf(stderr, "wrong register read $p%d\n", r);
        if (r == PR_BZ || r == PR_WZ || r == PR_DZ)
                tcg_gen_mov_tl(tn, tcg_const_tl(0));
        else if (r == PR_VR)
                tcg_gen_mov_tl(tn, tcg_const_tl(32));
        else
                tcg_gen_mov_tl(tn, cpu_PR[r]);
}
static inline void t_gen_mov_preg_TN(DisasContext *dc, int r, TCGv tn)
{
        if (r < 0 || r > 15)
                fprintf(stderr, "wrong register write $p%d\n", r);
        if (r == PR_BZ || r == PR_WZ || r == PR_DZ)
                return;
        else if (r == PR_SRS)
                tcg_gen_andi_tl(cpu_PR[r], tn, 3);
        else {
                if (r == PR_PID) 
                        gen_helper_tlb_flush_pid(tn);
                if (dc->tb_flags & S_FLAG && r == PR_SPC) 
                        gen_helper_spc_write(tn);
                else if (r == PR_CCS)
                        dc->cpustate_changed = 1;
                tcg_gen_mov_tl(cpu_PR[r], tn);
        }
}

/* Sign extend at translation time.  */
static int sign_extend(unsigned int val, unsigned int width)
{
        int sval;

        /* LSL.  */
        val <<= 31 - width;
        sval = val;
        /* ASR.  */
        sval >>= 31 - width;
        return sval;
}

static int cris_fetch(DisasContext *dc, uint32_t addr,
                      unsigned int size, unsigned int sign)
{
        int r;

        switch (size) {
                case 4:
                {
                        r = ldl_code(addr);
                        break;
                }
                case 2:
                {
                        if (sign) {
                                r = ldsw_code(addr);
                        } else {
                                r = lduw_code(addr);
                        }
                        break;
                }
                case 1:
                {
                        if (sign) {
                                r = ldsb_code(addr);
                        } else {
                                r = ldub_code(addr);
                        }
                        break;
                }
                default:
                        cpu_abort(dc->env, "Invalid fetch size %d\n", size);
                        break;
        }
        return r;
}

static void cris_lock_irq(DisasContext *dc)
{
        dc->clear_locked_irq = 0;
        t_gen_mov_env_TN(locked_irq, tcg_const_tl(1));
}

static inline void t_gen_raise_exception(uint32_t index)
{
        TCGv_i32 tmp = tcg_const_i32(index);
        gen_helper_raise_exception(tmp);
        tcg_temp_free_i32(tmp);
}

static void t_gen_lsl(TCGv d, TCGv a, TCGv b)
{
        TCGv t0, t_31;

        t0 = tcg_temp_new();
        t_31 = tcg_const_tl(31);
        tcg_gen_shl_tl(d, a, b);

        tcg_gen_sub_tl(t0, t_31, b);
        tcg_gen_sar_tl(t0, t0, t_31);
        tcg_gen_and_tl(t0, t0, d);
        tcg_gen_xor_tl(d, d, t0);
        tcg_temp_free(t0);
        tcg_temp_free(t_31);
}

static void t_gen_lsr(TCGv d, TCGv a, TCGv b)
{
        TCGv t0, t_31;

        t0 = tcg_temp_new();
        t_31 = tcg_temp_new();
        tcg_gen_shr_tl(d, a, b);

        tcg_gen_movi_tl(t_31, 31);
        tcg_gen_sub_tl(t0, t_31, b);
        tcg_gen_sar_tl(t0, t0, t_31);
        tcg_gen_and_tl(t0, t0, d);
        tcg_gen_xor_tl(d, d, t0);
        tcg_temp_free(t0);
        tcg_temp_free(t_31);
}

static void t_gen_asr(TCGv d, TCGv a, TCGv b)
{
        TCGv t0, t_31;

        t0 = tcg_temp_new();
        t_31 = tcg_temp_new();
        tcg_gen_sar_tl(d, a, b);

        tcg_gen_movi_tl(t_31, 31);
        tcg_gen_sub_tl(t0, t_31, b);
        tcg_gen_sar_tl(t0, t0, t_31);
        tcg_gen_or_tl(d, d, t0);
        tcg_temp_free(t0);
        tcg_temp_free(t_31);
}

/* 64-bit signed mul, lower result in d and upper in d2.  */
static void t_gen_muls(TCGv d, TCGv d2, TCGv a, TCGv b)
{
        TCGv_i64 t0, t1;

        t0 = tcg_temp_new_i64();
        t1 = tcg_temp_new_i64();

        tcg_gen_ext_i32_i64(t0, a);
        tcg_gen_ext_i32_i64(t1, b);
        tcg_gen_mul_i64(t0, t0, t1);

        tcg_gen_trunc_i64_i32(d, t0);
        tcg_gen_shri_i64(t0, t0, 32);
        tcg_gen_trunc_i64_i32(d2, t0);

        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
}

/* 64-bit unsigned muls, lower result in d and upper in d2.  */
static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b)
{
        TCGv_i64 t0, t1;

        t0 = tcg_temp_new_i64();
        t1 = tcg_temp_new_i64();

        tcg_gen_extu_i32_i64(t0, a);
        tcg_gen_extu_i32_i64(t1, b);
        tcg_gen_mul_i64(t0, t0, t1);

        tcg_gen_trunc_i64_i32(d, t0);
        tcg_gen_shri_i64(t0, t0, 32);
        tcg_gen_trunc_i64_i32(d2, t0);

        tcg_temp_free_i64(t0);
        tcg_temp_free_i64(t1);
}

static void t_gen_cris_dstep(TCGv d, TCGv a, TCGv b)
{
        int l1;

        l1 = gen_new_label();

        /* 
         * d <<= 1
         * if (d >= s)
         *    d -= s;
         */
        tcg_gen_shli_tl(d, a, 1);
        tcg_gen_brcond_tl(TCG_COND_LTU, d, b, l1);
        tcg_gen_sub_tl(d, d, b);
        gen_set_label(l1);
}

static void t_gen_cris_mstep(TCGv d, TCGv a, TCGv b, TCGv ccs)
{
        TCGv t;

        /* 
         * d <<= 1
         * if (n)
         *    d += s;
         */
        t = tcg_temp_new();
        tcg_gen_shli_tl(d, a, 1);
        tcg_gen_shli_tl(t, ccs, 31 - 3);
        tcg_gen_sari_tl(t, t, 31);
        tcg_gen_and_tl(t, t, b);
        tcg_gen_add_tl(d, d, t);
        tcg_temp_free(t);
}

/* Extended arithmetics on CRIS.  */
static inline void t_gen_add_flag(TCGv d, int flag)
{
        TCGv c;

        c = tcg_temp_new();
        t_gen_mov_TN_preg(c, PR_CCS);
        /* Propagate carry into d.  */
        tcg_gen_andi_tl(c, c, 1 << flag);
        if (flag)
                tcg_gen_shri_tl(c, c, flag);
        tcg_gen_add_tl(d, d, c);
        tcg_temp_free(c);
}

static inline void t_gen_addx_carry(DisasContext *dc, TCGv d)
{
        if (dc->flagx_known) {
                if (dc->flags_x) {
                        TCGv c;
            
                        c = tcg_temp_new();
                        t_gen_mov_TN_preg(c, PR_CCS);
                        /* C flag is already at bit 0.  */
                        tcg_gen_andi_tl(c, c, C_FLAG);
                        tcg_gen_add_tl(d, d, c);
                        tcg_temp_free(c);
                }
        } else {
                TCGv x, c;

                x = tcg_temp_new();
                c = tcg_temp_new();
                t_gen_mov_TN_preg(x, PR_CCS);
                tcg_gen_mov_tl(c, x);

                /* Propagate carry into d if X is set. Branch free.  */
                tcg_gen_andi_tl(c, c, C_FLAG);
                tcg_gen_andi_tl(x, x, X_FLAG);
                tcg_gen_shri_tl(x, x, 4);

                tcg_gen_and_tl(x, x, c);
                tcg_gen_add_tl(d, d, x);        
                tcg_temp_free(x);
                tcg_temp_free(c);
        }
}

static inline void t_gen_subx_carry(DisasContext *dc, TCGv d)
{
        if (dc->flagx_known) {
                if (dc->flags_x) {
                        TCGv c;
            
                        c = tcg_temp_new();
                        t_gen_mov_TN_preg(c, PR_CCS);
                        /* C flag is already at bit 0.  */
                        tcg_gen_andi_tl(c, c, C_FLAG);
                        tcg_gen_sub_tl(d, d, c);
                        tcg_temp_free(c);
                }
        } else {
                TCGv x, c;

                x = tcg_temp_new();
                c = tcg_temp_new();
                t_gen_mov_TN_preg(x, PR_CCS);
                tcg_gen_mov_tl(c, x);

                /* Propagate carry into d if X is set. Branch free.  */
                tcg_gen_andi_tl(c, c, C_FLAG);
                tcg_gen_andi_tl(x, x, X_FLAG);
                tcg_gen_shri_tl(x, x, 4);

                tcg_gen_and_tl(x, x, c);
                tcg_gen_sub_tl(d, d, x);
                tcg_temp_free(x);
                tcg_temp_free(c);
        }
}

/* Swap the two bytes within each half word of the s operand.
   T0 = ((T0 << 8) & 0xff00ff00) | ((T0 >> 8) & 0x00ff00ff)  */
static inline void t_gen_swapb(TCGv d, TCGv s)
{
        TCGv t, org_s;

        t = tcg_temp_new();
        org_s = tcg_temp_new();

        /* d and s may refer to the same object.  */
        tcg_gen_mov_tl(org_s, s);
        tcg_gen_shli_tl(t, org_s, 8);
        tcg_gen_andi_tl(d, t, 0xff00ff00);
        tcg_gen_shri_tl(t, org_s, 8);
        tcg_gen_andi_tl(t, t, 0x00ff00ff);
        tcg_gen_or_tl(d, d, t);
        tcg_temp_free(t);
        tcg_temp_free(org_s);
}

/* Swap the halfwords of the s operand.  */
static inline void t_gen_swapw(TCGv d, TCGv s)
{
        TCGv t;
        /* d and s refer the same object.  */
        t = tcg_temp_new();
        tcg_gen_mov_tl(t, s);
        tcg_gen_shli_tl(d, t, 16);
        tcg_gen_shri_tl(t, t, 16);
        tcg_gen_or_tl(d, d, t);
        tcg_temp_free(t);
}

/* Reverse the within each byte.
   T0 = (((T0 << 7) & 0x80808080) |
   ((T0 << 5) & 0x40404040) |
   ((T0 << 3) & 0x20202020) |
   ((T0 << 1) & 0x10101010) |
   ((T0 >> 1) & 0x08080808) |
   ((T0 >> 3) & 0x04040404) |
   ((T0 >> 5) & 0x02020202) |
   ((T0 >> 7) & 0x01010101));
 */
static inline void t_gen_swapr(TCGv d, TCGv s)
{
        struct {
                int shift; /* LSL when positive, LSR when negative.  */
                uint32_t mask;
        } bitrev [] = {
                {7, 0x80808080},
                {5, 0x40404040},
                {3, 0x20202020},
                {1, 0x10101010},
                {-1, 0x08080808},
                {-3, 0x04040404},
                {-5, 0x02020202},
                {-7, 0x01010101}
        };
        int i;
        TCGv t, org_s;

        /* d and s refer the same object.  */
        t = tcg_temp_new();
        org_s = tcg_temp_new();
        tcg_gen_mov_tl(org_s, s);

        tcg_gen_shli_tl(t, org_s,  bitrev[0].shift);
        tcg_gen_andi_tl(d, t,  bitrev[0].mask);
        for (i = 1; i < ARRAY_SIZE(bitrev); i++) {
                if (bitrev[i].shift >= 0) {
                        tcg_gen_shli_tl(t, org_s,  bitrev[i].shift);
                } else {
                        tcg_gen_shri_tl(t, org_s,  -bitrev[i].shift);
                }
                tcg_gen_andi_tl(t, t,  bitrev[i].mask);
                tcg_gen_or_tl(d, d, t);
        }
        tcg_temp_free(t);
        tcg_temp_free(org_s);
}

static void t_gen_cc_jmp(TCGv pc_true, TCGv pc_false)
{
        int l1;

        l1 = gen_new_label();

        /* Conditional jmp.  */
        tcg_gen_mov_tl(env_pc, pc_false);
        tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1);
        tcg_gen_mov_tl(env_pc, pc_true);
        gen_set_label(l1);
}

static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
{
        TranslationBlock *tb;
        tb = dc->tb;
        if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
                tcg_gen_goto_tb(n);
                tcg_gen_movi_tl(env_pc, dest);
                tcg_gen_exit_tb((tcg_target_long)tb + n);
        } else {
                tcg_gen_movi_tl(env_pc, dest);
                tcg_gen_exit_tb(0);
        }
}

static inline void cris_clear_x_flag(DisasContext *dc)
{
        if (dc->flagx_known && dc->flags_x)
                dc->flags_uptodate = 0;

        dc->flagx_known = 1;
        dc->flags_x = 0;
}

static void cris_flush_cc_state(DisasContext *dc)
{
        if (dc->cc_size_uptodate != dc->cc_size) {
                tcg_gen_movi_tl(cc_size, dc->cc_size);
                dc->cc_size_uptodate = dc->cc_size;
        }
        tcg_gen_movi_tl(cc_op, dc->cc_op);
        tcg_gen_movi_tl(cc_mask, dc->cc_mask);
}

static void cris_evaluate_flags(DisasContext *dc)
{
        if (dc->flags_uptodate)
                return;

        cris_flush_cc_state(dc);

        switch (dc->cc_op)
        {
        case CC_OP_MCP:
                gen_helper_evaluate_flags_mcp(cpu_PR[PR_CCS],
                                        cpu_PR[PR_CCS], cc_src,
                                        cc_dest, cc_result);
                break;
        case CC_OP_MULS:
                gen_helper_evaluate_flags_muls(cpu_PR[PR_CCS],
                                        cpu_PR[PR_CCS], cc_result,
                                        cpu_PR[PR_MOF]);
                break;
        case CC_OP_MULU:
                gen_helper_evaluate_flags_mulu(cpu_PR[PR_CCS],
                                        cpu_PR[PR_CCS], cc_result,
                                        cpu_PR[PR_MOF]);
                break;
        case CC_OP_MOVE:
        case CC_OP_AND:
        case CC_OP_OR:
        case CC_OP_XOR:
        case CC_OP_ASR:
        case CC_OP_LSR:
        case CC_OP_LSL:
                switch (dc->cc_size)
                {
                case 4:
                        gen_helper_evaluate_flags_move_4(cpu_PR[PR_CCS],
                                                cpu_PR[PR_CCS], cc_result);
                        break;
                case 2:
                        gen_helper_evaluate_flags_move_2(cpu_PR[PR_CCS],
                                                cpu_PR[PR_CCS], cc_result);
                        break;
                default:
                        gen_helper_evaluate_flags();
                        break;
                }
                break;
        case CC_OP_FLAGS:
                /* live.  */
                break;
        case CC_OP_SUB:
        case CC_OP_CMP:
                if (dc->cc_size == 4)
                        gen_helper_evaluate_flags_sub_4(cpu_PR[PR_CCS],
                                cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
                else
                        gen_helper_evaluate_flags();

                break;
        default:
                switch (dc->cc_size)
                {
                        case 4:
                        gen_helper_evaluate_flags_alu_4(cpu_PR[PR_CCS],
                                cpu_PR[PR_CCS], cc_src, cc_dest, cc_result);
                                break;
                        default:
                                gen_helper_evaluate_flags();
                                break;
                }
                break;
        }

        if (dc->flagx_known) {
                if (dc->flags_x)
                        tcg_gen_ori_tl(cpu_PR[PR_CCS], 
                                       cpu_PR[PR_CCS], X_FLAG);
                else if (dc->cc_op == CC_OP_FLAGS)
                        tcg_gen_andi_tl(cpu_PR[PR_CCS], 
                                        cpu_PR[PR_CCS], ~X_FLAG);
        }
        dc->flags_uptodate = 1;
}

static void cris_cc_mask(DisasContext *dc, unsigned int mask)
{
        uint32_t ovl;

        if (!mask) {
                dc->update_cc = 0;
                return;
        }       

        /* Check if we need to evaluate the condition codes due to 
           CC overlaying.  */
        ovl = (dc->cc_mask ^ mask) & ~mask;
        if (ovl) {
                /* TODO: optimize this case. It trigs all the time.  */
                cris_evaluate_flags (dc);
        }
        dc->cc_mask = mask;
        dc->update_cc = 1;
}

static void cris_update_cc_op(DisasContext *dc, int op, int size)
{
        dc->cc_op = op;
        dc->cc_size = size;
        dc->flags_uptodate = 0;
}

static inline void cris_update_cc_x(DisasContext *dc)
{
        /* Save the x flag state at the time of the cc snapshot.  */
        if (dc->flagx_known) {
                if (dc->cc_x_uptodate == (2 | dc->flags_x))
                        return;
                tcg_gen_movi_tl(cc_x, dc->flags_x);
                dc->cc_x_uptodate = 2 | dc->flags_x;
        }
        else {
                tcg_gen_andi_tl(cc_x, cpu_PR[PR_CCS], X_FLAG);
                dc->cc_x_uptodate = 1;
        }
}

/* Update cc prior to executing ALU op. Needs source operands untouched.  */
static void cris_pre_alu_update_cc(DisasContext *dc, int op, 
                                   TCGv dst, TCGv src, int size)
{
        if (dc->update_cc) {
                cris_update_cc_op(dc, op, size);
                tcg_gen_mov_tl(cc_src, src);

                if (op != CC_OP_MOVE
                    && op != CC_OP_AND
                    && op != CC_OP_OR
                    && op != CC_OP_XOR
                    && op != CC_OP_ASR
                    && op != CC_OP_LSR
                    && op != CC_OP_LSL)
                        tcg_gen_mov_tl(cc_dest, dst);

                cris_update_cc_x(dc);
        }
}

/* Update cc after executing ALU op. needs the result.  */
static inline void cris_update_result(DisasContext *dc, TCGv res)
{
        if (dc->update_cc)
                tcg_gen_mov_tl(cc_result, res);
}

/* Returns one if the write back stage should execute.  */
static void cris_alu_op_exec(DisasContext *dc, int op, 
                               TCGv dst, TCGv a, TCGv b, int size)
{
        /* Emit the ALU insns.  */
        switch (op)
        {
                case CC_OP_ADD:
                        tcg_gen_add_tl(dst, a, b);
                        /* Extended arithmetics.  */
                        t_gen_addx_carry(dc, dst);
                        break;
                case CC_OP_ADDC:
                        tcg_gen_add_tl(dst, a, b);
                        t_gen_add_flag(dst, 0); /* C_FLAG.  */
                        break;
                case CC_OP_MCP:
                        tcg_gen_add_tl(dst, a, b);
                        t_gen_add_flag(dst, 8); /* R_FLAG.  */
                        break;
                case CC_OP_SUB:
                        tcg_gen_sub_tl(dst, a, b);
                        /* Extended arithmetics.  */
                        t_gen_subx_carry(dc, dst);
                        break;
                case CC_OP_MOVE:
                        tcg_gen_mov_tl(dst, b);
                        break;
                case CC_OP_OR:
                        tcg_gen_or_tl(dst, a, b);
                        break;
                case CC_OP_AND:
                        tcg_gen_and_tl(dst, a, b);
                        break;
                case CC_OP_XOR:
                        tcg_gen_xor_tl(dst, a, b);
                        break;
                case CC_OP_LSL:
                        t_gen_lsl(dst, a, b);
                        break;
                case CC_OP_LSR:
                        t_gen_lsr(dst, a, b);
                        break;
                case CC_OP_ASR:
                        t_gen_asr(dst, a, b);
                        break;
                case CC_OP_NEG:
                        tcg_gen_neg_tl(dst, b);
                        /* Extended arithmetics.  */
                        t_gen_subx_carry(dc, dst);
                        break;
                case CC_OP_LZ:
                        gen_helper_lz(dst, b);
                        break;
                case CC_OP_MULS:
                        t_gen_muls(dst, cpu_PR[PR_MOF], a, b);
                        break;
                case CC_OP_MULU:
                        t_gen_mulu(dst, cpu_PR[PR_MOF], a, b);
                        break;
                case CC_OP_DSTEP:
                        t_gen_cris_dstep(dst, a, b);
                        break;
                case CC_OP_MSTEP:
                        t_gen_cris_mstep(dst, a, b, cpu_PR[PR_CCS]);
                        break;
                case CC_OP_BOUND:
                {
                        int l1;
                        l1 = gen_new_label();
                        tcg_gen_mov_tl(dst, a);
                        tcg_gen_brcond_tl(TCG_COND_LEU, a, b, l1);
                        tcg_gen_mov_tl(dst, b);
                        gen_set_label(l1);
                }
                break;
                case CC_OP_CMP:
                        tcg_gen_sub_tl(dst, a, b);
                        /* Extended arithmetics.  */
                        t_gen_subx_carry(dc, dst);
                        break;
                default:
                        qemu_log("illegal ALU op.\n");
                        BUG();
                        break;
        }

        if (size == 1)
                tcg_gen_andi_tl(dst, dst, 0xff);
        else if (size == 2)
                tcg_gen_andi_tl(dst, dst, 0xffff);
}

static void cris_alu(DisasContext *dc, int op,
                               TCGv d, TCGv op_a, TCGv op_b, int size)
{
        TCGv tmp;
        int writeback;

        writeback = 1;

        if (op == CC_OP_CMP) {
                tmp = tcg_temp_new();
                writeback = 0;
        } else if (size == 4) {
                tmp = d;
                writeback = 0;
        } else
                tmp = tcg_temp_new();


        cris_pre_alu_update_cc(dc, op, op_a, op_b, size);
        cris_alu_op_exec(dc, op, tmp, op_a, op_b, size);
        cris_update_result(dc, tmp);

        /* Writeback.  */
        if (writeback) {
                if (size == 1)
                        tcg_gen_andi_tl(d, d, ~0xff);
                else
                        tcg_gen_andi_tl(d, d, ~0xffff);
                tcg_gen_or_tl(d, d, tmp);
        }
        if (!TCGV_EQUAL(tmp, d))
                tcg_temp_free(tmp);
}

static int arith_cc(DisasContext *dc)
{
        if (dc->update_cc) {
                switch (dc->cc_op) {
                        case CC_OP_ADDC: return 1;
                        case CC_OP_ADD: return 1;
                        case CC_OP_SUB: return 1;
                        case CC_OP_DSTEP: return 1;
                        case CC_OP_LSL: return 1;
                        case CC_OP_LSR: return 1;
                        case CC_OP_ASR: return 1;
                        case CC_OP_CMP: return 1;
                        case CC_OP_NEG: return 1;
                        case CC_OP_OR: return 1;
                        case CC_OP_AND: return 1;
                        case CC_OP_XOR: return 1;
                        case CC_OP_MULU: return 1;
                        case CC_OP_MULS: return 1;
                        default:
                                return 0;
                }
        }
        return 0;
}

static void gen_tst_cc (DisasContext *dc, TCGv cc, int cond)
{
        int arith_opt, move_opt;

        /* TODO: optimize more condition codes.  */

        /*
         * If the flags are live, we've gotta look into the bits of CCS.
         * Otherwise, if we just did an arithmetic operation we try to
         * evaluate the condition code faster.
         *
         * When this function is done, T0 should be non-zero if the condition
         * code is true.
         */
        arith_opt = arith_cc(dc) && !dc->flags_uptodate;
        move_opt = (dc->cc_op == CC_OP_MOVE);
        switch (cond) {
                case CC_EQ:
                        if ((arith_opt || move_opt)
                            && dc->cc_x_uptodate != (2 | X_FLAG)) {
                                tcg_gen_setcond_tl(TCG_COND_EQ, cc,
                                                   cc_result, tcg_const_tl(0));
                        }
                        else {
                                cris_evaluate_flags(dc);
                                tcg_gen_andi_tl(cc, 
                                                cpu_PR[PR_CCS], Z_FLAG);
                        }
                        break;
                case CC_NE:
                        if ((arith_opt || move_opt)
                            && dc->cc_x_uptodate != (2 | X_FLAG)) {
                                tcg_gen_mov_tl(cc, cc_result);
                        } else {
                                cris_evaluate_flags(dc);
                                tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
                                                Z_FLAG);
                                tcg_gen_andi_tl(cc, cc, Z_FLAG);
                        }
                        break;
                case CC_CS:
                        cris_evaluate_flags(dc);
                        tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], C_FLAG);
                        break;
                case CC_CC:
                        cris_evaluate_flags(dc);
                        tcg_gen_xori_tl(cc, cpu_PR[PR_CCS], C_FLAG);
                        tcg_gen_andi_tl(cc, cc, C_FLAG);
                        break;
                case CC_VS:
                        cris_evaluate_flags(dc);
                        tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], V_FLAG);
                        break;
                case CC_VC:
                        cris_evaluate_flags(dc);
                        tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
                                        V_FLAG);
                        tcg_gen_andi_tl(cc, cc, V_FLAG);
                        break;
                case CC_PL:
                        if (arith_opt || move_opt) {
                                int bits = 31;

                                if (dc->cc_size == 1)
                                        bits = 7;
                                else if (dc->cc_size == 2)
                                        bits = 15;      

                                tcg_gen_shri_tl(cc, cc_result, bits);
                                tcg_gen_xori_tl(cc, cc, 1);
                        } else {
                                cris_evaluate_flags(dc);
                                tcg_gen_xori_tl(cc, cpu_PR[PR_CCS],
                                                N_FLAG);
                                tcg_gen_andi_tl(cc, cc, N_FLAG);
                        }
                        break;
                case CC_MI:
                        if (arith_opt || move_opt) {

                                int bits = 31;

                                if (dc->cc_size == 1)
                                        bits = 7;
                                else if (dc->cc_size == 2)
                                        bits = 15;      

                                tcg_gen_shri_tl(cc, cc_result, bits);
                                tcg_gen_andi_tl(cc, cc, 1);
                        }
                        else {
                                cris_evaluate_flags(dc);
                                tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
                                                N_FLAG);
                        }
                        break;
                case CC_LS:
                        cris_evaluate_flags(dc);
                        tcg_gen_andi_tl(cc, cpu_PR[PR_CCS],
                                        C_FLAG | Z_FLAG);
                        break;
                case CC_HI:
                        cris_evaluate_flags(dc);
                        {
                                TCGv tmp;

                                tmp = tcg_temp_new();
                                tcg_gen_xori_tl(tmp, cpu_PR[PR_CCS],
                                                C_FLAG | Z_FLAG);
                                /* Overlay the C flag on top of the Z.  */
                                tcg_gen_shli_tl(cc, tmp, 2);
                                tcg_gen_and_tl(cc, tmp, cc);
                                tcg_gen_andi_tl(cc, cc, Z_FLAG);

                                tcg_temp_free(tmp);
                        }
                        break;
                case CC_GE:
                        cris_evaluate_flags(dc);
                        /* Overlay the V flag on top of the N.  */
                        tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
                        tcg_gen_xor_tl(cc,
                                       cpu_PR[PR_CCS], cc);
                        tcg_gen_andi_tl(cc, cc, N_FLAG);
                        tcg_gen_xori_tl(cc, cc, N_FLAG);
                        break;
                case CC_LT:
                        cris_evaluate_flags(dc);
                        /* Overlay the V flag on top of the N.  */
                        tcg_gen_shli_tl(cc, cpu_PR[PR_CCS], 2);
                        tcg_gen_xor_tl(cc,
                                       cpu_PR[PR_CCS], cc);
                        tcg_gen_andi_tl(cc, cc, N_FLAG);
                        break;
                case CC_GT:
                        cris_evaluate_flags(dc);
                        {
                                TCGv n, z;

                                n = tcg_temp_new();
                                z = tcg_temp_new();

                                /* To avoid a shift we overlay everything on
                                   the V flag.  */
                                tcg_gen_shri_tl(n, cpu_PR[PR_CCS], 2);
                                tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);
                                /* invert Z.  */
                                tcg_gen_xori_tl(z, z, 2);

                                tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
                                tcg_gen_xori_tl(n, n, 2);
                                tcg_gen_and_tl(cc, z, n);
                                tcg_gen_andi_tl(cc, cc, 2);

                                tcg_temp_free(n);
                                tcg_temp_free(z);
                        }
                        break;
                case CC_LE:
                        cris_evaluate_flags(dc);
                        {
                                TCGv n, z;

                                n = tcg_temp_new();
                                z = tcg_temp_new();

                                /* To avoid a shift we overlay everything on
                                   the V flag.  */
                                tcg_gen_shri_tl(n, cpu_PR[PR_CCS], 2);
                                tcg_gen_shri_tl(z, cpu_PR[PR_CCS], 1);

                                tcg_gen_xor_tl(n, n, cpu_PR[PR_CCS]);
                                tcg_gen_or_tl(cc, z, n);
                                tcg_gen_andi_tl(cc, cc, 2);

                                tcg_temp_free(n);
                                tcg_temp_free(z);
                        }
                        break;
                case CC_P:
                        cris_evaluate_flags(dc);
                        tcg_gen_andi_tl(cc, cpu_PR[PR_CCS], P_FLAG);
                        break;
                case CC_A:
                        tcg_gen_movi_tl(cc, 1);
                        break;
                default:
                        BUG();
                        break;
        };
}

static void cris_store_direct_jmp(DisasContext *dc)
{
        /* Store the direct jmp state into the cpu-state.  */
        if (dc->jmp == JMP_DIRECT || dc->jmp == JMP_DIRECT_CC) {
                if (dc->jmp == JMP_DIRECT) {
                        tcg_gen_movi_tl(env_btaken, 1);
                }
                tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
                dc->jmp = JMP_INDIRECT;
        }
}

static void cris_prepare_cc_branch (DisasContext *dc, 
                                    int offset, int cond)
{
        /* This helps us re-schedule the micro-code to insns in delay-slots
           before the actual jump.  */
        dc->delayed_branch = 2;
        dc->jmp = JMP_DIRECT_CC;
        dc->jmp_pc = dc->pc + offset;

        gen_tst_cc (dc, env_btaken, cond);
        tcg_gen_movi_tl(env_btarget, dc->jmp_pc);
}


/* jumps, when the dest is in a live reg for example. Direct should be set
   when the dest addr is constant to allow tb chaining.  */
static inline void cris_prepare_jmp (DisasContext *dc, unsigned int type)
{
        /* This helps us re-schedule the micro-code to insns in delay-slots
           before the actual jump.  */
        dc->delayed_branch = 2;
        dc->jmp = type;
        if (type == JMP_INDIRECT) {
                tcg_gen_movi_tl(env_btaken, 1);
        }
}

static void gen_load64(DisasContext *dc, TCGv_i64 dst, TCGv addr)
{
        int mem_index = cpu_mmu_index(dc->env);

        /* If we get a fault on a delayslot we must keep the jmp state in
           the cpu-state to be able to re-execute the jmp.  */
        if (dc->delayed_branch == 1)
                cris_store_direct_jmp(dc);

        tcg_gen_qemu_ld64(dst, addr, mem_index);
}

static void gen_load(DisasContext *dc, TCGv dst, TCGv addr, 
                     unsigned int size, int sign)
{
        int mem_index = cpu_mmu_index(dc->env);

        /* If we get a fault on a delayslot we must keep the jmp state in
           the cpu-state to be able to re-execute the jmp.  */
        if (dc->delayed_branch == 1)
                cris_store_direct_jmp(dc);

        if (size == 1) {
                if (sign)
                        tcg_gen_qemu_ld8s(dst, addr, mem_index);
                else
                        tcg_gen_qemu_ld8u(dst, addr, mem_index);
        }
        else if (size == 2) {
                if (sign)
                        tcg_gen_qemu_ld16s(dst, addr, mem_index);
                else
                        tcg_gen_qemu_ld16u(dst, addr, mem_index);
        }
        else if (size == 4) {
                tcg_gen_qemu_ld32u(dst, addr, mem_index);
        }
        else {
                abort();
        }
}

static void gen_store (DisasContext *dc, TCGv addr, TCGv val,
                       unsigned int size)
{
        int mem_index = cpu_mmu_index(dc->env);

        /* If we get a fault on a delayslot we must keep the jmp state in
           the cpu-state to be able to re-execute the jmp.  */
        if (dc->delayed_branch == 1)
                cris_store_direct_jmp(dc);


        /* Conditional writes. We only support the kind were X and P are known
           at translation time.  */
        if (dc->flagx_known && dc->flags_x && (dc->tb_flags & P_FLAG)) {
                dc->postinc = 0;
                cris_evaluate_flags(dc);
                tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], C_FLAG);
                return;
        }

        if (size == 1)
                tcg_gen_qemu_st8(val, addr, mem_index);
        else if (size == 2)
                tcg_gen_qemu_st16(val, addr, mem_index);
        else
                tcg_gen_qemu_st32(val, addr, mem_index);

        if (dc->flagx_known && dc->flags_x) {
                cris_evaluate_flags(dc);
                tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~C_FLAG);
        }
}

static inline void t_gen_sext(TCGv d, TCGv s, int size)
{
        if (size == 1)
                tcg_gen_ext8s_i32(d, s);
        else if (size == 2)
                tcg_gen_ext16s_i32(d, s);
        else if(!TCGV_EQUAL(d, s))
                tcg_gen_mov_tl(d, s);
}

static inline void t_gen_zext(TCGv d, TCGv s, int size)
{
        if (size == 1)
                tcg_gen_ext8u_i32(d, s);
        else if (size == 2)
                tcg_gen_ext16u_i32(d, s);
        else if (!TCGV_EQUAL(d, s))
                tcg_gen_mov_tl(d, s);
}

#if DISAS_CRIS
static char memsize_char(int size)
{
        switch (size)
        {
                case 1: return 'b';  break;
                case 2: return 'w';  break;
                case 4: return 'd';  break;
                default:
                        return 'x';
                        break;
        }
}
#endif

static inline unsigned int memsize_z(DisasContext *dc)
{
        return dc->zsize + 1;
}

static inline unsigned int memsize_zz(DisasContext *dc)
{
        switch (dc->zzsize)
        {
                case 0: return 1;
                case 1: return 2;
                default:
                        return 4;
        }
}

static inline void do_postinc (DisasContext *dc, int size)
{
        if (dc->postinc)
                tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], size);
}

static inline void dec_prep_move_r(DisasContext *dc, int rs, int rd,
                                   int size, int s_ext, TCGv dst)
{
        if (s_ext)
                t_gen_sext(dst, cpu_R[rs], size);
        else
                t_gen_zext(dst, cpu_R[rs], size);
}

/* Prepare T0 and T1 for a register alu operation.
   s_ext decides if the operand1 should be sign-extended or zero-extended when
   needed.  */
static void dec_prep_alu_r(DisasContext *dc, int rs, int rd,
                          int size, int s_ext, TCGv dst, TCGv src)
{
        dec_prep_move_r(dc, rs, rd, size, s_ext, src);

        if (s_ext)
                t_gen_sext(dst, cpu_R[rd], size);
        else
                t_gen_zext(dst, cpu_R[rd], size);
}

static int dec_prep_move_m(DisasContext *dc, int s_ext, int memsize,
                           TCGv dst)
{
        unsigned int rs;
        uint32_t imm;
        int is_imm;
        int insn_len = 2;

        rs = dc->op1;
        is_imm = rs == 15 && dc->postinc;

        /* Load [$rs] onto T1.  */
        if (is_imm) {
                insn_len = 2 + memsize;
                if (memsize == 1)
                        insn_len++;

                imm = cris_fetch(dc, dc->pc + 2, memsize, s_ext);
                tcg_gen_movi_tl(dst, imm);
                dc->postinc = 0;
        } else {
                cris_flush_cc_state(dc);
                gen_load(dc, dst, cpu_R[rs], memsize, 0);
                if (s_ext)
                        t_gen_sext(dst, dst, memsize);
                else
                        t_gen_zext(dst, dst, memsize);
        }
        return insn_len;
}

/* Prepare T0 and T1 for a memory + alu operation.
   s_ext decides if the operand1 should be sign-extended or zero-extended when
   needed.  */
static int dec_prep_alu_m(DisasContext *dc, int s_ext, int memsize,
                          TCGv dst, TCGv src)
{
        int insn_len;

        insn_len = dec_prep_move_m(dc, s_ext, memsize, src);
        tcg_gen_mov_tl(dst, cpu_R[dc->op2]);
        return insn_len;
}

#if DISAS_CRIS
static const char *cc_name(int cc)
{
        static const char *cc_names[16] = {
                "cc", "cs", "ne", "eq", "vc", "vs", "pl", "mi",
                "ls", "hi", "ge", "lt", "gt", "le", "a", "p"
        };
        assert(cc < 16);
        return cc_names[cc];
}
#endif

/* Start of insn decoders.  */

static int dec_bccq(DisasContext *dc)
{
        int32_t offset;
        int sign;
        uint32_t cond = dc->op2;

        offset = EXTRACT_FIELD (dc->ir, 1, 7);
        sign = EXTRACT_FIELD(dc->ir, 0, 0);

        offset *= 2;
        offset |= sign << 8;
        offset = sign_extend(offset, 8);

        LOG_DIS("b%s %x\n", cc_name(cond), dc->pc + offset);

        /* op2 holds the condition-code.  */
        cris_cc_mask(dc, 0);
        cris_prepare_cc_branch (dc, offset, cond);
        return 2;
}
static int dec_addoq(DisasContext *dc)
{
        int32_t imm;

        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 7);
        imm = sign_extend(dc->op1, 7);

        LOG_DIS("addoq %d, $r%u\n", imm, dc->op2);
        cris_cc_mask(dc, 0);
        /* Fetch register operand,  */
        tcg_gen_addi_tl(cpu_R[R_ACR], cpu_R[dc->op2], imm);

        return 2;
}
static int dec_addq(DisasContext *dc)
{
        LOG_DIS("addq %u, $r%u\n", dc->op1, dc->op2);

        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);

        cris_cc_mask(dc, CC_MASK_NZVC);

        cris_alu(dc, CC_OP_ADD,
                    cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
        return 2;
}
static int dec_moveq(DisasContext *dc)
{
        uint32_t imm;

        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
        imm = sign_extend(dc->op1, 5);
        LOG_DIS("moveq %d, $r%u\n", imm, dc->op2);

        tcg_gen_movi_tl(cpu_R[dc->op2], imm);
        return 2;
}
static int dec_subq(DisasContext *dc)
{
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);

        LOG_DIS("subq %u, $r%u\n", dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_SUB,
                    cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(dc->op1), 4);
        return 2;
}
static int dec_cmpq(DisasContext *dc)
{
        uint32_t imm;
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
        imm = sign_extend(dc->op1, 5);

        LOG_DIS("cmpq %d, $r%d\n", imm, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZVC);

        cris_alu(dc, CC_OP_CMP,
                    cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
        return 2;
}
static int dec_andq(DisasContext *dc)
{
        uint32_t imm;
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
        imm = sign_extend(dc->op1, 5);

        LOG_DIS("andq %d, $r%d\n", imm, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);

        cris_alu(dc, CC_OP_AND,
                    cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
        return 2;
}
static int dec_orq(DisasContext *dc)
{
        uint32_t imm;
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 5);
        imm = sign_extend(dc->op1, 5);
        LOG_DIS("orq %d, $r%d\n", imm, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);

        cris_alu(dc, CC_OP_OR,
                    cpu_R[dc->op2], cpu_R[dc->op2], tcg_const_tl(imm), 4);
        return 2;
}
static int dec_btstq(DisasContext *dc)
{
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
        LOG_DIS("btstq %u, $r%d\n", dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        cris_evaluate_flags(dc);
        gen_helper_btst(cpu_PR[PR_CCS], cpu_R[dc->op2],
                        tcg_const_tl(dc->op1), cpu_PR[PR_CCS]);
        cris_alu(dc, CC_OP_MOVE,
                 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op2], 4);
        cris_update_cc_op(dc, CC_OP_FLAGS, 4);
        dc->flags_uptodate = 1;
        return 2;
}
static int dec_asrq(DisasContext *dc)
{
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
        LOG_DIS("asrq %u, $r%d\n", dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);

        tcg_gen_sari_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op2],
                    cpu_R[dc->op2], cpu_R[dc->op2], 4);
        return 2;
}
static int dec_lslq(DisasContext *dc)
{
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
        LOG_DIS("lslq %u, $r%d\n", dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);

        tcg_gen_shli_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);

        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op2],
                    cpu_R[dc->op2], cpu_R[dc->op2], 4);
        return 2;
}
static int dec_lsrq(DisasContext *dc)
{
        dc->op1 = EXTRACT_FIELD(dc->ir, 0, 4);
        LOG_DIS("lsrq %u, $r%d\n", dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);

        tcg_gen_shri_tl(cpu_R[dc->op2], cpu_R[dc->op2], dc->op1);
        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op2],
                    cpu_R[dc->op2], cpu_R[dc->op2], 4);
        return 2;
}

static int dec_move_r(DisasContext *dc)
{
        int size = memsize_zz(dc);

        LOG_DIS("move.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        if (size == 4) {
                dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, cpu_R[dc->op2]);
                cris_cc_mask(dc, CC_MASK_NZ);
                cris_update_cc_op(dc, CC_OP_MOVE, 4);
                cris_update_cc_x(dc);
                cris_update_result(dc, cpu_R[dc->op2]);
        }
        else {
                TCGv t0;

                t0 = tcg_temp_new();
                dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, t0);
                cris_alu(dc, CC_OP_MOVE,
                         cpu_R[dc->op2],
                         cpu_R[dc->op2], t0, size);
                tcg_temp_free(t0);
        }
        return 2;
}

static int dec_scc_r(DisasContext *dc)
{
        int cond = dc->op2;

        LOG_DIS("s%s $r%u\n",
                    cc_name(cond), dc->op1);

        if (cond != CC_A)
        {
                int l1;

                gen_tst_cc (dc, cpu_R[dc->op1], cond);
                l1 = gen_new_label();
                tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_R[dc->op1], 0, l1);
                tcg_gen_movi_tl(cpu_R[dc->op1], 1);
                gen_set_label(l1);
        }
        else
                tcg_gen_movi_tl(cpu_R[dc->op1], 1);

        cris_cc_mask(dc, 0);
        return 2;
}

static inline void cris_alu_alloc_temps(DisasContext *dc, int size, TCGv *t)
{
        if (size == 4) {
                t[0] = cpu_R[dc->op2];
                t[1] = cpu_R[dc->op1];
        } else {
                t[0] = tcg_temp_new();
                t[1] = tcg_temp_new();
        }
}

static inline void cris_alu_free_temps(DisasContext *dc, int size, TCGv *t)
{
        if (size != 4) {
                tcg_temp_free(t[0]);
                tcg_temp_free(t[1]);
        }
}

static int dec_and_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);

        LOG_DIS("and.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);

        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
        cris_alu(dc, CC_OP_AND, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_lz_r(DisasContext *dc)
{
        TCGv t0;
        LOG_DIS("lz $r%u, $r%u\n",
                    dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);
        t0 = tcg_temp_new();
        dec_prep_alu_r(dc, dc->op1, dc->op2, 4, 0, cpu_R[dc->op2], t0);
        cris_alu(dc, CC_OP_LZ, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

static int dec_lsl_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);

        LOG_DIS("lsl.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
        tcg_gen_andi_tl(t[1], t[1], 63);
        cris_alu(dc, CC_OP_LSL, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_alloc_temps(dc, size, t);
        return 2;
}

static int dec_lsr_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);

        LOG_DIS("lsr.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
        tcg_gen_andi_tl(t[1], t[1], 63);
        cris_alu(dc, CC_OP_LSR, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_asr_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);

        LOG_DIS("asr.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1, t[0], t[1]);
        tcg_gen_andi_tl(t[1], t[1], 63);
        cris_alu(dc, CC_OP_ASR, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_muls_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);

        LOG_DIS("muls.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZV);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 1, t[0], t[1]);

        cris_alu(dc, CC_OP_MULS, cpu_R[dc->op2], t[0], t[1], 4);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_mulu_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);

        LOG_DIS("mulu.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZV);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);

        cris_alu(dc, CC_OP_MULU, cpu_R[dc->op2], t[0], t[1], 4);
        cris_alu_alloc_temps(dc, size, t);
        return 2;
}


static int dec_dstep_r(DisasContext *dc)
{
        LOG_DIS("dstep $r%u, $r%u\n", dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu(dc, CC_OP_DSTEP,
                    cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op1], 4);
        return 2;
}

static int dec_xor_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);
        LOG_DIS("xor.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        BUG_ON(size != 4); /* xor is dword.  */
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);

        cris_alu(dc, CC_OP_XOR, cpu_R[dc->op2], t[0], t[1], 4);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_bound_r(DisasContext *dc)
{
        TCGv l0;
        int size = memsize_zz(dc);
        LOG_DIS("bound.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);
        l0 = tcg_temp_local_new();
        dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, l0);
        cris_alu(dc, CC_OP_BOUND, cpu_R[dc->op2], cpu_R[dc->op2], l0, 4);
        tcg_temp_free(l0);
        return 2;
}

static int dec_cmp_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);
        LOG_DIS("cmp.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);

        cris_alu(dc, CC_OP_CMP, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_abs_r(DisasContext *dc)
{
        TCGv t0;

        LOG_DIS("abs $r%u, $r%u\n",
                    dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);

        t0 = tcg_temp_new();
        tcg_gen_sari_tl(t0, cpu_R[dc->op1], 31);
        tcg_gen_xor_tl(cpu_R[dc->op2], cpu_R[dc->op1], t0);
        tcg_gen_sub_tl(cpu_R[dc->op2], cpu_R[dc->op2], t0);
        tcg_temp_free(t0);

        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op2], 4);
        return 2;
}

static int dec_add_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);
        LOG_DIS("add.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);

        cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_addc_r(DisasContext *dc)
{
        LOG_DIS("addc $r%u, $r%u\n",
                    dc->op1, dc->op2);
        cris_evaluate_flags(dc);
        /* Set for this insn.  */
        dc->flagx_known = 1;
        dc->flags_x = X_FLAG;

        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_ADDC,
                 cpu_R[dc->op2], cpu_R[dc->op2], cpu_R[dc->op1], 4);
        return 2;
}

static int dec_mcp_r(DisasContext *dc)
{
        LOG_DIS("mcp $p%u, $r%u\n",
                     dc->op2, dc->op1);
        cris_evaluate_flags(dc);
        cris_cc_mask(dc, CC_MASK_RNZV);
        cris_alu(dc, CC_OP_MCP,
                    cpu_R[dc->op1], cpu_R[dc->op1], cpu_PR[dc->op2], 4);
        return 2;
}

#if DISAS_CRIS
static char * swapmode_name(int mode, char *modename) {
        int i = 0;
        if (mode & 8)
                modename[i++] = 'n';
        if (mode & 4)
                modename[i++] = 'w';
        if (mode & 2)
                modename[i++] = 'b';
        if (mode & 1)
                modename[i++] = 'r';
        modename[i++] = 0;
        return modename;
}
#endif

static int dec_swap_r(DisasContext *dc)
{
        TCGv t0;
#if DISAS_CRIS
        char modename[4];
#endif
        LOG_DIS("swap%s $r%u\n",
                     swapmode_name(dc->op2, modename), dc->op1);

        cris_cc_mask(dc, CC_MASK_NZ);
        t0 = tcg_temp_new();
        t_gen_mov_TN_reg(t0, dc->op1);
        if (dc->op2 & 8)
                tcg_gen_not_tl(t0, t0);
        if (dc->op2 & 4)
                t_gen_swapw(t0, t0);
        if (dc->op2 & 2)
                t_gen_swapb(t0, t0);
        if (dc->op2 & 1)
                t_gen_swapr(t0, t0);
        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op1], cpu_R[dc->op1], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

static int dec_or_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);
        LOG_DIS("or.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
        cris_alu(dc, CC_OP_OR, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_addi_r(DisasContext *dc)
{
        TCGv t0;
        LOG_DIS("addi.%c $r%u, $r%u\n",
                    memsize_char(memsize_zz(dc)), dc->op2, dc->op1);
        cris_cc_mask(dc, 0);
        t0 = tcg_temp_new();
        tcg_gen_shl_tl(t0, cpu_R[dc->op2], tcg_const_tl(dc->zzsize));
        tcg_gen_add_tl(cpu_R[dc->op1], cpu_R[dc->op1], t0);
        tcg_temp_free(t0);
        return 2;
}

static int dec_addi_acr(DisasContext *dc)
{
        TCGv t0;
        LOG_DIS("addi.%c $r%u, $r%u, $acr\n",
                  memsize_char(memsize_zz(dc)), dc->op2, dc->op1);
        cris_cc_mask(dc, 0);
        t0 = tcg_temp_new();
        tcg_gen_shl_tl(t0, cpu_R[dc->op2], tcg_const_tl(dc->zzsize));
        tcg_gen_add_tl(cpu_R[R_ACR], cpu_R[dc->op1], t0);
        tcg_temp_free(t0);
        return 2;
}

static int dec_neg_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);
        LOG_DIS("neg.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);

        cris_alu(dc, CC_OP_NEG, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

static int dec_btst_r(DisasContext *dc)
{
        LOG_DIS("btst $r%u, $r%u\n",
                    dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_evaluate_flags(dc);
        gen_helper_btst(cpu_PR[PR_CCS], cpu_R[dc->op2],
                        cpu_R[dc->op1], cpu_PR[PR_CCS]);
        cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2],
                 cpu_R[dc->op2], cpu_R[dc->op2], 4);
        cris_update_cc_op(dc, CC_OP_FLAGS, 4);
        dc->flags_uptodate = 1;
        return 2;
}

static int dec_sub_r(DisasContext *dc)
{
        TCGv t[2];
        int size = memsize_zz(dc);
        LOG_DIS("sub.%c $r%u, $r%u\n",
                    memsize_char(size), dc->op1, dc->op2);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu_alloc_temps(dc, size, t);
        dec_prep_alu_r(dc, dc->op1, dc->op2, size, 0, t[0], t[1]);
        cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], t[0], t[1], size);
        cris_alu_free_temps(dc, size, t);
        return 2;
}

/* Zero extension. From size to dword.  */
static int dec_movu_r(DisasContext *dc)
{
        TCGv t0;
        int size = memsize_z(dc);
        LOG_DIS("movu.%c $r%u, $r%u\n",
                    memsize_char(size),
                    dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        t0 = tcg_temp_new();
        dec_prep_move_r(dc, dc->op1, dc->op2, size, 0, t0);
        cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

/* Sign extension. From size to dword.  */
static int dec_movs_r(DisasContext *dc)
{
        TCGv t0;
        int size = memsize_z(dc);
        LOG_DIS("movs.%c $r%u, $r%u\n",
                    memsize_char(size),
                    dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZ);
        t0 = tcg_temp_new();
        /* Size can only be qi or hi.  */
        t_gen_sext(t0, cpu_R[dc->op1], size);
        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op2], cpu_R[dc->op1], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

/* zero extension. From size to dword.  */
static int dec_addu_r(DisasContext *dc)
{
        TCGv t0;
        int size = memsize_z(dc);
        LOG_DIS("addu.%c $r%u, $r%u\n",
                    memsize_char(size),
                    dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZVC);
        t0 = tcg_temp_new();
        /* Size can only be qi or hi.  */
        t_gen_zext(t0, cpu_R[dc->op1], size);
        cris_alu(dc, CC_OP_ADD,

                    cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

/* Sign extension. From size to dword.  */
static int dec_adds_r(DisasContext *dc)
{
        TCGv t0;
        int size = memsize_z(dc);
        LOG_DIS("adds.%c $r%u, $r%u\n",
                    memsize_char(size),
                    dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZVC);
        t0 = tcg_temp_new();
        /* Size can only be qi or hi.  */
        t_gen_sext(t0, cpu_R[dc->op1], size);
        cris_alu(dc, CC_OP_ADD,
                    cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

/* Zero extension. From size to dword.  */
static int dec_subu_r(DisasContext *dc)
{
        TCGv t0;
        int size = memsize_z(dc);
        LOG_DIS("subu.%c $r%u, $r%u\n",
                    memsize_char(size),
                    dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZVC);
        t0 = tcg_temp_new();
        /* Size can only be qi or hi.  */
        t_gen_zext(t0, cpu_R[dc->op1], size);
        cris_alu(dc, CC_OP_SUB,
                    cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

/* Sign extension. From size to dword.  */
static int dec_subs_r(DisasContext *dc)
{
        TCGv t0;
        int size = memsize_z(dc);
        LOG_DIS("subs.%c $r%u, $r%u\n",
                    memsize_char(size),
                    dc->op1, dc->op2);

        cris_cc_mask(dc, CC_MASK_NZVC);
        t0 = tcg_temp_new();
        /* Size can only be qi or hi.  */
        t_gen_sext(t0, cpu_R[dc->op1], size);
        cris_alu(dc, CC_OP_SUB,
                    cpu_R[dc->op2], cpu_R[dc->op2], t0, 4);
        tcg_temp_free(t0);
        return 2;
}

static int dec_setclrf(DisasContext *dc)
{
        uint32_t flags;
        int set = (~dc->opcode >> 2) & 1;


        flags = (EXTRACT_FIELD(dc->ir, 12, 15) << 4)
                | EXTRACT_FIELD(dc->ir, 0, 3);
        if (set && flags == 0) {
                LOG_DIS("nop\n");
                return 2;
        } else if (!set && (flags & 0x20)) {
                LOG_DIS("di\n");
        }
        else {
                LOG_DIS("%sf %x\n",
                             set ? "set" : "clr",
                            flags);
        }

        /* User space is not allowed to touch these. Silently ignore.  */
        if (dc->tb_flags & U_FLAG) {
                flags &= ~(S_FLAG | I_FLAG | U_FLAG);
        }

        if (flags & X_FLAG) {
                dc->flagx_known = 1;
                if (set)
                        dc->flags_x = X_FLAG;
                else
                        dc->flags_x = 0;
        }

        /* Break the TB if any of the SPI flag changes.  */
        if (flags & (P_FLAG | S_FLAG)) {
                tcg_gen_movi_tl(env_pc, dc->pc + 2);
                dc->is_jmp = DISAS_UPDATE;
                dc->cpustate_changed = 1;
        }

        /* For the I flag, only act on posedge.  */
        if ((flags & I_FLAG)) {
                tcg_gen_movi_tl(env_pc, dc->pc + 2);
                dc->is_jmp = DISAS_UPDATE;
                dc->cpustate_changed = 1;
        }


        /* Simply decode the flags.  */
        cris_evaluate_flags (dc);
        cris_update_cc_op(dc, CC_OP_FLAGS, 4);
        cris_update_cc_x(dc);
        tcg_gen_movi_tl(cc_op, dc->cc_op);

        if (set) {
                if (!(dc->tb_flags & U_FLAG) && (flags & U_FLAG)) {
                        /* Enter user mode.  */
                        t_gen_mov_env_TN(ksp, cpu_R[R_SP]);
                        tcg_gen_mov_tl(cpu_R[R_SP], cpu_PR[PR_USP]);
                        dc->cpustate_changed = 1;
                }
                tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], flags);
        }
        else
                tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~flags);

        dc->flags_uptodate = 1;
        dc->clear_x = 0;
        return 2;
}

static int dec_move_rs(DisasContext *dc)
{
        LOG_DIS("move $r%u, $s%u\n", dc->op1, dc->op2);
        cris_cc_mask(dc, 0);
        gen_helper_movl_sreg_reg(tcg_const_tl(dc->op2), tcg_const_tl(dc->op1));
        return 2;
}
static int dec_move_sr(DisasContext *dc)
{
        LOG_DIS("move $s%u, $r%u\n", dc->op2, dc->op1);
        cris_cc_mask(dc, 0);
        gen_helper_movl_reg_sreg(tcg_const_tl(dc->op1), tcg_const_tl(dc->op2));
        return 2;
}

static int dec_move_rp(DisasContext *dc)
{
        TCGv t[2];
        LOG_DIS("move $r%u, $p%u\n", dc->op1, dc->op2);
        cris_cc_mask(dc, 0);

        t[0] = tcg_temp_new();
        if (dc->op2 == PR_CCS) {
                cris_evaluate_flags(dc);
                t_gen_mov_TN_reg(t[0], dc->op1);
                if (dc->tb_flags & U_FLAG) {
                        t[1] = tcg_temp_new();
                        /* User space is not allowed to touch all flags.  */
                        tcg_gen_andi_tl(t[0], t[0], 0x39f);
                        tcg_gen_andi_tl(t[1], cpu_PR[PR_CCS], ~0x39f);
                        tcg_gen_or_tl(t[0], t[1], t[0]);
                        tcg_temp_free(t[1]);
                }
        }
        else
                t_gen_mov_TN_reg(t[0], dc->op1);

        t_gen_mov_preg_TN(dc, dc->op2, t[0]);
        if (dc->op2 == PR_CCS) {
                cris_update_cc_op(dc, CC_OP_FLAGS, 4);
                dc->flags_uptodate = 1;
        }
        tcg_temp_free(t[0]);
        return 2;
}
static int dec_move_pr(DisasContext *dc)
{
        TCGv t0;
        LOG_DIS("move $p%u, $r%u\n", dc->op2, dc->op1);
        cris_cc_mask(dc, 0);

        if (dc->op2 == PR_CCS)
                cris_evaluate_flags(dc);

        if (dc->op2 == PR_DZ) {
                tcg_gen_movi_tl(cpu_R[dc->op1], 0);
        } else {
                t0 = tcg_temp_new();
                t_gen_mov_TN_preg(t0, dc->op2);
                cris_alu(dc, CC_OP_MOVE,
                         cpu_R[dc->op1], cpu_R[dc->op1], t0,
                         preg_sizes[dc->op2]);
                tcg_temp_free(t0);
        }
        return 2;
}

static int dec_move_mr(DisasContext *dc)
{
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("move.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        if (memsize == 4) {
                insn_len = dec_prep_move_m(dc, 0, 4, cpu_R[dc->op2]);
                cris_cc_mask(dc, CC_MASK_NZ);
                cris_update_cc_op(dc, CC_OP_MOVE, 4);
                cris_update_cc_x(dc);
                cris_update_result(dc, cpu_R[dc->op2]);
        }
        else {
                TCGv t0;

                t0 = tcg_temp_new();
                insn_len = dec_prep_move_m(dc, 0, memsize, t0);
                cris_cc_mask(dc, CC_MASK_NZ);
                cris_alu(dc, CC_OP_MOVE,
                            cpu_R[dc->op2], cpu_R[dc->op2], t0, memsize);
                tcg_temp_free(t0);
        }
        do_postinc(dc, memsize);
        return insn_len;
}

static inline void cris_alu_m_alloc_temps(TCGv *t)
{
        t[0] = tcg_temp_new();
        t[1] = tcg_temp_new();
}

static inline void cris_alu_m_free_temps(TCGv *t)
{
        tcg_temp_free(t[0]);
        tcg_temp_free(t[1]);
}

static int dec_movs_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("movs.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        /* sign extend.  */
        insn_len = dec_prep_alu_m(dc, 1, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu(dc, CC_OP_MOVE,
                    cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_addu_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("addu.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        /* sign extend.  */
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_ADD,
                    cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_adds_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("adds.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        /* sign extend.  */
        insn_len = dec_prep_alu_m(dc, 1, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_ADD, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_subu_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("subu.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        /* sign extend.  */
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_subs_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("subs.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        /* sign extend.  */
        insn_len = dec_prep_alu_m(dc, 1, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_movu_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;

        LOG_DIS("movu.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu(dc, CC_OP_MOVE, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_cmpu_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("cmpu.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_CMP, cpu_R[dc->op2], cpu_R[dc->op2], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_cmps_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_z(dc);
        int insn_len;
        LOG_DIS("cmps.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 1, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_CMP,
                    cpu_R[dc->op2], cpu_R[dc->op2], t[1],
                    memsize_zz(dc));
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_cmp_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("cmp.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_CMP,
                    cpu_R[dc->op2], cpu_R[dc->op2], t[1],
                    memsize_zz(dc));
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_test_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("test.%c [$r%u%s] op2=%x\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_evaluate_flags(dc);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZ);
        tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~3);

        cris_alu(dc, CC_OP_CMP,
                 cpu_R[dc->op2], t[1], tcg_const_tl(0), memsize_zz(dc));
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_and_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("and.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu(dc, CC_OP_AND, cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_add_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("add.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_ADD,
                 cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_addo_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("add.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 1, memsize, t[0], t[1]);
        cris_cc_mask(dc, 0);
        cris_alu(dc, CC_OP_ADD, cpu_R[R_ACR], t[0], t[1], 4);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_bound_m(DisasContext *dc)
{
        TCGv l[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("bound.%c [$r%u%s, $r%u\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        l[0] = tcg_temp_local_new();
        l[1] = tcg_temp_local_new();
        insn_len = dec_prep_alu_m(dc, 0, memsize, l[0], l[1]);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu(dc, CC_OP_BOUND, cpu_R[dc->op2], l[0], l[1], 4);
        do_postinc(dc, memsize);
        tcg_temp_free(l[0]);
        tcg_temp_free(l[1]);
        return insn_len;
}

static int dec_addc_mr(DisasContext *dc)
{
        TCGv t[2];
        int insn_len = 2;
        LOG_DIS("addc [$r%u%s, $r%u\n",
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_evaluate_flags(dc);

        /* Set for this insn.  */
        dc->flagx_known = 1;
        dc->flags_x = X_FLAG;

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, 4, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_ADDC, cpu_R[dc->op2], t[0], t[1], 4);
        do_postinc(dc, 4);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_sub_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("sub.%c [$r%u%s, $r%u ir=%x zz=%x\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2, dc->ir, dc->zzsize);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZVC);
        cris_alu(dc, CC_OP_SUB, cpu_R[dc->op2], t[0], t[1], memsize);
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_or_m(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len;
        LOG_DIS("or.%c [$r%u%s, $r%u pc=%x\n",
                    memsize_char(memsize),
                    dc->op1, dc->postinc ? "+]" : "]",
                    dc->op2, dc->pc);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, CC_MASK_NZ);
        cris_alu(dc, CC_OP_OR,
                    cpu_R[dc->op2], t[0], t[1], memsize_zz(dc));
        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_move_mp(DisasContext *dc)
{
        TCGv t[2];
        int memsize = memsize_zz(dc);
        int insn_len = 2;

        LOG_DIS("move.%c [$r%u%s, $p%u\n",
                    memsize_char(memsize),
                    dc->op1,
                    dc->postinc ? "+]" : "]",
                    dc->op2);

        cris_alu_m_alloc_temps(t);
        insn_len = dec_prep_alu_m(dc, 0, memsize, t[0], t[1]);
        cris_cc_mask(dc, 0);
        if (dc->op2 == PR_CCS) {
                cris_evaluate_flags(dc);
                if (dc->tb_flags & U_FLAG) {
                        /* User space is not allowed to touch all flags.  */
                        tcg_gen_andi_tl(t[1], t[1], 0x39f);
                        tcg_gen_andi_tl(t[0], cpu_PR[PR_CCS], ~0x39f);
                        tcg_gen_or_tl(t[1], t[0], t[1]);
                }
        }

        t_gen_mov_preg_TN(dc, dc->op2, t[1]);

        do_postinc(dc, memsize);
        cris_alu_m_free_temps(t);
        return insn_len;
}

static int dec_move_pm(DisasContext *dc)
{
        TCGv t0;
        int memsize;

        memsize = preg_sizes[dc->op2];

        LOG_DIS("move.%c $p%u, [$r%u%s\n",
                     memsize_char(memsize), 
                     dc->op2, dc->op1, dc->postinc ? "+]" : "]");

        /* prepare store. Address in T0, value in T1.  */
        if (dc->op2 == PR_CCS)
                cris_evaluate_flags(dc);
        t0 = tcg_temp_new();
        t_gen_mov_TN_preg(t0, dc->op2);
        cris_flush_cc_state(dc);
        gen_store(dc, cpu_R[dc->op1], t0, memsize);
        tcg_temp_free(t0);

        cris_cc_mask(dc, 0);
        if (dc->postinc)
                tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], memsize);
        return 2;
}

static int dec_movem_mr(DisasContext *dc)
{
        TCGv_i64 tmp[16];
        TCGv tmp32;
        TCGv addr;
        int i;
        int nr = dc->op2 + 1;

        LOG_DIS("movem [$r%u%s, $r%u\n", dc->op1,
                    dc->postinc ? "+]" : "]", dc->op2);

        addr = tcg_temp_new();
        /* There are probably better ways of doing this.  */
        cris_flush_cc_state(dc);
        for (i = 0; i < (nr >> 1); i++) {
                tmp[i] = tcg_temp_new_i64();
                tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
                gen_load64(dc, tmp[i], addr);
        }
        if (nr & 1) {
                tmp32 = tcg_temp_new_i32();
                tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
                gen_load(dc, tmp32, addr, 4, 0);
        } else
                TCGV_UNUSED(tmp32);
        tcg_temp_free(addr);

        for (i = 0; i < (nr >> 1); i++) {
                tcg_gen_trunc_i64_i32(cpu_R[i * 2], tmp[i]);
                tcg_gen_shri_i64(tmp[i], tmp[i], 32);
                tcg_gen_trunc_i64_i32(cpu_R[i * 2 + 1], tmp[i]);
                tcg_temp_free_i64(tmp[i]);
        }
        if (nr & 1) {
                tcg_gen_mov_tl(cpu_R[dc->op2], tmp32);
                tcg_temp_free(tmp32);
        }

        /* writeback the updated pointer value.  */
        if (dc->postinc)
                tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], nr * 4);

        /* gen_load might want to evaluate the previous insns flags.  */
        cris_cc_mask(dc, 0);
        return 2;
}

static int dec_movem_rm(DisasContext *dc)
{
        TCGv tmp;
        TCGv addr;
        int i;

        LOG_DIS("movem $r%u, [$r%u%s\n", dc->op2, dc->op1,
                     dc->postinc ? "+]" : "]");

        cris_flush_cc_state(dc);

        tmp = tcg_temp_new();
        addr = tcg_temp_new();
        tcg_gen_movi_tl(tmp, 4);
        tcg_gen_mov_tl(addr, cpu_R[dc->op1]);
        for (i = 0; i <= dc->op2; i++) {
                /* Displace addr.  */
                /* Perform the store.  */
                gen_store(dc, addr, cpu_R[i], 4);
                tcg_gen_add_tl(addr, addr, tmp);
        }
        if (dc->postinc)
                tcg_gen_mov_tl(cpu_R[dc->op1], addr);
        cris_cc_mask(dc, 0);
        tcg_temp_free(tmp);
        tcg_temp_free(addr);
        return 2;
}

static int dec_move_rm(DisasContext *dc)
{
        int memsize;

        memsize = memsize_zz(dc);

        LOG_DIS("move.%c $r%u, [$r%u]\n",
                     memsize_char(memsize), dc->op2, dc->op1);

        /* prepare store.  */
        cris_flush_cc_state(dc);
        gen_store(dc, cpu_R[dc->op1], cpu_R[dc->op2], memsize);

        if (dc->postinc)
                tcg_gen_addi_tl(cpu_R[dc->op1], cpu_R[dc->op1], memsize);
        cris_cc_mask(dc, 0);
        return 2;
}

static int dec_lapcq(DisasContext *dc)
{
        LOG_DIS("lapcq %x, $r%u\n",
                    dc->pc + dc->op1*2, dc->op2);
        cris_cc_mask(dc, 0);
        tcg_gen_movi_tl(cpu_R[dc->op2], dc->pc + dc->op1 * 2);
        return 2;
}

static int dec_lapc_im(DisasContext *dc)
{
        unsigned int rd;
        int32_t imm;
        int32_t pc;

        rd = dc->op2;

        cris_cc_mask(dc, 0);
        imm = cris_fetch(dc, dc->pc + 2, 4, 0);
        LOG_DIS("lapc 0x%x, $r%u\n", imm + dc->pc, dc->op2);

        pc = dc->pc;
        pc += imm;
        tcg_gen_movi_tl(cpu_R[rd], pc);
        return 6;
}

/* Jump to special reg.  */
static int dec_jump_p(DisasContext *dc)
{
        LOG_DIS("jump $p%u\n", dc->op2);

        if (dc->op2 == PR_CCS)
                cris_evaluate_flags(dc);
        t_gen_mov_TN_preg(env_btarget, dc->op2);
        /* rete will often have low bit set to indicate delayslot.  */
        tcg_gen_andi_tl(env_btarget, env_btarget, ~1);
        cris_cc_mask(dc, 0);
        cris_prepare_jmp(dc, JMP_INDIRECT);
        return 2;
}

/* Jump and save.  */
static int dec_jas_r(DisasContext *dc)
{
        LOG_DIS("jas $r%u, $p%u\n", dc->op1, dc->op2);
        cris_cc_mask(dc, 0);
        /* Store the return address in Pd.  */
        tcg_gen_mov_tl(env_btarget, cpu_R[dc->op1]);
        if (dc->op2 > 15)
                abort();
        t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 4));

        cris_prepare_jmp(dc, JMP_INDIRECT);
        return 2;
}

static int dec_jas_im(DisasContext *dc)
{
        uint32_t imm;

        imm = cris_fetch(dc, dc->pc + 2, 4, 0);

        LOG_DIS("jas 0x%x\n", imm);
        cris_cc_mask(dc, 0);
        /* Store the return address in Pd.  */
        t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8));

        dc->jmp_pc = imm;
        cris_prepare_jmp(dc, JMP_DIRECT);
        return 6;
}

static int dec_jasc_im(DisasContext *dc)
{
        uint32_t imm;

        imm = cris_fetch(dc, dc->pc + 2, 4, 0);

        LOG_DIS("jasc 0x%x\n", imm);
        cris_cc_mask(dc, 0);
        /* Store the return address in Pd.  */
        t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8 + 4));

        dc->jmp_pc = imm;
        cris_prepare_jmp(dc, JMP_DIRECT);
        return 6;
}

static int dec_jasc_r(DisasContext *dc)
{
        LOG_DIS("jasc_r $r%u, $p%u\n", dc->op1, dc->op2);
        cris_cc_mask(dc, 0);
        /* Store the return address in Pd.  */
        tcg_gen_mov_tl(env_btarget, cpu_R[dc->op1]);
        t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 4 + 4));
        cris_prepare_jmp(dc, JMP_INDIRECT);
        return 2;
}

static int dec_bcc_im(DisasContext *dc)
{
        int32_t offset;
        uint32_t cond = dc->op2;

        offset = cris_fetch(dc, dc->pc + 2, 2, 1);

        LOG_DIS("b%s %d pc=%x dst=%x\n",
                    cc_name(cond), offset,
                    dc->pc, dc->pc + offset);

        cris_cc_mask(dc, 0);
        /* op2 holds the condition-code.  */
        cris_prepare_cc_branch (dc, offset, cond);
        return 4;
}

static int dec_bas_im(DisasContext *dc)
{
        int32_t simm;


        simm = cris_fetch(dc, dc->pc + 2, 4, 0);

        LOG_DIS("bas 0x%x, $p%u\n", dc->pc + simm, dc->op2);
        cris_cc_mask(dc, 0);
        /* Store the return address in Pd.  */
        t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 8));

        dc->jmp_pc = dc->pc + simm;
        cris_prepare_jmp(dc, JMP_DIRECT);
        return 6;
}

static int dec_basc_im(DisasContext *dc)
{
        int32_t simm;
        simm = cris_fetch(dc, dc->pc + 2, 4, 0);

        LOG_DIS("basc 0x%x, $p%u\n", dc->pc + simm, dc->op2);
        cris_cc_mask(dc, 0);
        /* Store the return address in Pd.  */
        t_gen_mov_preg_TN(dc, dc->op2, tcg_const_tl(dc->pc + 12));

        dc->jmp_pc = dc->pc + simm;
        cris_prepare_jmp(dc, JMP_DIRECT);
        return 6;
}

static int dec_rfe_etc(DisasContext *dc)
{
        cris_cc_mask(dc, 0);

        if (dc->op2 == 15) {
                t_gen_mov_env_TN(halted, tcg_const_tl(1));
                tcg_gen_movi_tl(env_pc, dc->pc + 2);
                t_gen_raise_exception(EXCP_HLT);
                return 2;
        }

        switch (dc->op2 & 7) {
                case 2:
                        /* rfe.  */
                        LOG_DIS("rfe\n");
                        cris_evaluate_flags(dc);
                        gen_helper_rfe();
                        dc->is_jmp = DISAS_UPDATE;
                        break;
                case 5:
                        /* rfn.  */
                        LOG_DIS("rfn\n");
                        cris_evaluate_flags(dc);
                        gen_helper_rfn();
                        dc->is_jmp = DISAS_UPDATE;
                        break;
                case 6:
                        LOG_DIS("break %d\n", dc->op1);
                        cris_evaluate_flags (dc);
                        /* break.  */
                        tcg_gen_movi_tl(env_pc, dc->pc + 2);

                        /* Breaks start at 16 in the exception vector.  */
                        t_gen_mov_env_TN(trap_vector, 
                                         tcg_const_tl(dc->op1 + 16));
                        t_gen_raise_exception(EXCP_BREAK);
                        dc->is_jmp = DISAS_UPDATE;
                        break;
                default:
                        printf ("op2=%x\n", dc->op2);
                        BUG();
                        break;

        }
        return 2;
}

static int dec_ftag_fidx_d_m(DisasContext *dc)
{
        return 2;
}

static int dec_ftag_fidx_i_m(DisasContext *dc)
{
        return 2;
}

static int dec_null(DisasContext *dc)
{
        printf ("unknown insn pc=%x opc=%x op1=%x op2=%x\n",
                dc->pc, dc->opcode, dc->op1, dc->op2);
        fflush(NULL);
        BUG();
        return 2;
}

static struct decoder_info {
        struct {
                uint32_t bits;
                uint32_t mask;
        };
        int (*dec)(DisasContext *dc);
} decinfo[] = {
        /* Order matters here.  */
        {DEC_MOVEQ, dec_moveq},
        {DEC_BTSTQ, dec_btstq},
        {DEC_CMPQ, dec_cmpq},
        {DEC_ADDOQ, dec_addoq},
        {DEC_ADDQ, dec_addq},
        {DEC_SUBQ, dec_subq},
        {DEC_ANDQ, dec_andq},
        {DEC_ORQ, dec_orq},
        {DEC_ASRQ, dec_asrq},
        {DEC_LSLQ, dec_lslq},
        {DEC_LSRQ, dec_lsrq},
        {DEC_BCCQ, dec_bccq},

        {DEC_BCC_IM, dec_bcc_im},
        {DEC_JAS_IM, dec_jas_im},
        {DEC_JAS_R, dec_jas_r},
        {DEC_JASC_IM, dec_jasc_im},
        {DEC_JASC_R, dec_jasc_r},
        {DEC_BAS_IM, dec_bas_im},
        {DEC_BASC_IM, dec_basc_im},
        {DEC_JUMP_P, dec_jump_p},
        {DEC_LAPC_IM, dec_lapc_im},
        {DEC_LAPCQ, dec_lapcq},

        {DEC_RFE_ETC, dec_rfe_etc},
        {DEC_ADDC_MR, dec_addc_mr},

        {DEC_MOVE_MP, dec_move_mp},
        {DEC_MOVE_PM, dec_move_pm},
        {DEC_MOVEM_MR, dec_movem_mr},
        {DEC_MOVEM_RM, dec_movem_rm},
        {DEC_MOVE_PR, dec_move_pr},
        {DEC_SCC_R, dec_scc_r},
        {DEC_SETF, dec_setclrf},