target/rx/translate.c

/*
 *  RX translation
 *
 *  Copyright (c) 2019 Yoshinori Sato
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2 or later, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu/osdep.h"
#include "qemu/bswap.h"
#include "qemu/qemu-print.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "tcg/tcg-op.h"
#include "exec/helper-proto.h"
#include "exec/helper-gen.h"
#include "exec/translator.h"
#include "exec/log.h"

#define HELPER_H "helper.h"
#include "exec/helper-info.c.inc"
#undef  HELPER_H


typedef struct DisasContext {
    DisasContextBase base;
    CPURXState *env;
    uint32_t pc;
    uint32_t tb_flags;
} DisasContext;

typedef struct DisasCompare {
    TCGv value;
    TCGv temp;
    TCGCond cond;
} DisasCompare;

const char *rx_crname(uint8_t cr)
{
    static const char *cr_names[] = {
        "psw", "pc", "usp", "fpsw", "", "", "", "",
        "bpsw", "bpc", "isp", "fintv", "intb", "", "", ""
    };
    if (cr >= ARRAY_SIZE(cr_names)) {
        return "illegal";
    }
    return cr_names[cr];
}

/* Target-specific values for dc->base.is_jmp.  */
#define DISAS_JUMP    DISAS_TARGET_0
#define DISAS_UPDATE  DISAS_TARGET_1
#define DISAS_EXIT    DISAS_TARGET_2

/* global register indexes */
static TCGv cpu_regs[16];
static TCGv cpu_psw_o, cpu_psw_s, cpu_psw_z, cpu_psw_c;
static TCGv cpu_psw_i, cpu_psw_pm, cpu_psw_u, cpu_psw_ipl;
static TCGv cpu_usp, cpu_fpsw, cpu_bpsw, cpu_bpc, cpu_isp;
static TCGv cpu_fintv, cpu_intb, cpu_pc;
static TCGv_i64 cpu_acc;

#define cpu_sp cpu_regs[0]

/* decoder helper */
static uint32_t decode_load_bytes(DisasContext *ctx, uint32_t insn,
                                  int i, int n)
{
    while (++i <= n) {
        uint8_t b = translator_ldub(ctx->env, &ctx->base, ctx->base.pc_next++);
        insn |= b << (32 - i * 8);
    }
    return insn;
}

static uint32_t li(DisasContext *ctx, int sz)
{
    target_ulong addr;
    uint32_t tmp;
    CPURXState *env = ctx->env;
    addr = ctx->base.pc_next;

    switch (sz) {
    case 1:
        ctx->base.pc_next += 1;
        return (int8_t)translator_ldub(env, &ctx->base, addr);
    case 2:
        ctx->base.pc_next += 2;
        return (int16_t)translator_lduw(env, &ctx->base, addr);
    case 3:
        ctx->base.pc_next += 3;
        tmp = (int8_t)translator_ldub(env, &ctx->base, addr + 2);
        tmp <<= 16;
        tmp |= translator_lduw(env, &ctx->base, addr);
        return tmp;
    case 0:
        ctx->base.pc_next += 4;
        return translator_ldl(env, &ctx->base, addr);
    default:
        g_assert_not_reached();
    }
    return 0;
}

static int bdsp_s(DisasContext *ctx, int d)
{
    /*
     * 0 -> 8
     * 1 -> 9
     * 2 -> 10
     * 3 -> 3
     * :
     * 7 -> 7
     */
    if (d < 3) {
        d += 8;
    }
    return d;
}

/* Include the auto-generated decoder. */
#include "decode-insns.c.inc"

void rx_cpu_dump_state(CPUState *cs, FILE *f, int flags)
{
    CPURXState *env = cpu_env(cs);
    int i;
    uint32_t psw;

    psw = rx_cpu_pack_psw(env);
    qemu_fprintf(f, "pc=0x%08x psw=0x%08x\n",
                 env->pc, psw);
    for (i = 0; i < 16; i += 4) {
        qemu_fprintf(f, "r%d=0x%08x r%d=0x%08x r%d=0x%08x r%d=0x%08x\n",
                     i, env->regs[i], i + 1, env->regs[i + 1],
                     i + 2, env->regs[i + 2], i + 3, env->regs[i + 3]);
    }
}

static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
{
    if (translator_use_goto_tb(&dc->base, dest)) {
        tcg_gen_goto_tb(n);
        tcg_gen_movi_i32(cpu_pc, dest);
        tcg_gen_exit_tb(dc->base.tb, n);
    } else {
        tcg_gen_movi_i32(cpu_pc, dest);
        tcg_gen_lookup_and_goto_ptr();
    }
    dc->base.is_jmp = DISAS_NORETURN;
}

/* generic load wrapper */
static inline void rx_gen_ld(unsigned int size, TCGv reg, TCGv mem)
{
    tcg_gen_qemu_ld_i32(reg, mem, 0, size | MO_SIGN | MO_TE);
}

/* unsigned load wrapper */
static inline void rx_gen_ldu(unsigned int size, TCGv reg, TCGv mem)
{
    tcg_gen_qemu_ld_i32(reg, mem, 0, size | MO_TE);
}

/* generic store wrapper */
static inline void rx_gen_st(unsigned int size, TCGv reg, TCGv mem)
{
    tcg_gen_qemu_st_i32(reg, mem, 0, size | MO_TE);
}

/* [ri, rb] */
static inline void rx_gen_regindex(DisasContext *ctx, TCGv mem,
                                   int size, int ri, int rb)
{
    tcg_gen_shli_i32(mem, cpu_regs[ri], size);
    tcg_gen_add_i32(mem, mem, cpu_regs[rb]);
}

/* dsp[reg] */
static inline TCGv rx_index_addr(DisasContext *ctx, TCGv mem,
                                 int ld, int size, int reg)
{
    uint32_t dsp;

    switch (ld) {
    case 0:
        return cpu_regs[reg];
    case 1:
        dsp = translator_ldub(ctx->env, &ctx->base, ctx->base.pc_next) << size;
        tcg_gen_addi_i32(mem, cpu_regs[reg], dsp);
        ctx->base.pc_next += 1;
        return mem;
    case 2:
        dsp = translator_lduw(ctx->env, &ctx->base, ctx->base.pc_next) << size;
        tcg_gen_addi_i32(mem, cpu_regs[reg], dsp);
        ctx->base.pc_next += 2;
        return mem;
    default:
        g_assert_not_reached();
    }
}

static inline MemOp mi_to_mop(unsigned mi)
{
    static const MemOp mop[5] = { MO_SB, MO_SW, MO_UL, MO_UW, MO_UB };
    tcg_debug_assert(mi < 5);
    return mop[mi];
}

/* load source operand */
static inline TCGv rx_load_source(DisasContext *ctx, TCGv mem,
                                  int ld, int mi, int rs)
{
    TCGv addr;
    MemOp mop;
    if (ld < 3) {
        mop = mi_to_mop(mi);
        addr = rx_index_addr(ctx, mem, ld, mop & MO_SIZE, rs);
        tcg_gen_qemu_ld_i32(mem, addr, 0, mop | MO_TE);
        return mem;
    } else {
        return cpu_regs[rs];
    }
}

/* Processor mode check */
static int is_privileged(DisasContext *ctx, int is_exception)
{
    if (FIELD_EX32(ctx->tb_flags, PSW, PM)) {
        if (is_exception) {
            gen_helper_raise_privilege_violation(tcg_env);
        }
        return 0;
    } else {
        return 1;
    }
}

/* generate QEMU condition */
static void psw_cond(DisasCompare *dc, uint32_t cond)
{
    tcg_debug_assert(cond < 16);
    switch (cond) {
    case 0: /* z */
        dc->cond = TCG_COND_EQ;
        dc->value = cpu_psw_z;
        break;
    case 1: /* nz */
        dc->cond = TCG_COND_NE;
        dc->value = cpu_psw_z;
        break;
    case 2: /* c */
        dc->cond = TCG_COND_NE;
        dc->value = cpu_psw_c;
        break;
    case 3: /* nc */
        dc->cond = TCG_COND_EQ;
        dc->value = cpu_psw_c;
        break;
    case 4: /* gtu (C& ~Z) == 1 */
    case 5: /* leu (C& ~Z) == 0 */
        tcg_gen_setcondi_i32(TCG_COND_NE, dc->temp, cpu_psw_z, 0);
        tcg_gen_and_i32(dc->temp, dc->temp, cpu_psw_c);
        dc->cond = (cond == 4) ? TCG_COND_NE : TCG_COND_EQ;
        dc->value = dc->temp;
        break;
    case 6: /* pz (S == 0) */
        dc->cond = TCG_COND_GE;
        dc->value = cpu_psw_s;
        break;
    case 7: /* n (S == 1) */
        dc->cond = TCG_COND_LT;
        dc->value = cpu_psw_s;
        break;
    case 8: /* ge (S^O)==0 */
    case 9: /* lt (S^O)==1 */
        tcg_gen_xor_i32(dc->temp, cpu_psw_o, cpu_psw_s);
        dc->cond = (cond == 8) ? TCG_COND_GE : TCG_COND_LT;
        dc->value = dc->temp;
        break;
    case 10: /* gt ((S^O)|Z)==0 */
    case 11: /* le ((S^O)|Z)==1 */
        tcg_gen_xor_i32(dc->temp, cpu_psw_o, cpu_psw_s);
        tcg_gen_sari_i32(dc->temp, dc->temp, 31);
        tcg_gen_andc_i32(dc->temp, cpu_psw_z, dc->temp);
        dc->cond = (cond == 10) ? TCG_COND_NE : TCG_COND_EQ;
        dc->value = dc->temp;
        break;
    case 12: /* o */
        dc->cond = TCG_COND_LT;
        dc->value = cpu_psw_o;
        break;
    case 13: /* no */
        dc->cond = TCG_COND_GE;
        dc->value = cpu_psw_o;
        break;
    case 14: /* always true */
        dc->cond = TCG_COND_ALWAYS;
        dc->value = dc->temp;
        break;
    case 15: /* always false */
        dc->cond = TCG_COND_NEVER;
        dc->value = dc->temp;
        break;
    }
}

static void move_from_cr(DisasContext *ctx, TCGv ret, int cr, uint32_t pc)
{
    switch (cr) {
    case 0:     /* PSW */
        gen_helper_pack_psw(ret, tcg_env);
        break;
    case 1:     /* PC */
        tcg_gen_movi_i32(ret, pc);
        break;
    case 2:     /* USP */
        if (FIELD_EX32(ctx->tb_flags, PSW, U)) {
            tcg_gen_mov_i32(ret, cpu_sp);
        } else {
            tcg_gen_mov_i32(ret, cpu_usp);
        }
        break;
    case 3:     /* FPSW */
        tcg_gen_mov_i32(ret, cpu_fpsw);
        break;
    case 8:     /* BPSW */
        tcg_gen_mov_i32(ret, cpu_bpsw);
        break;
    case 9:     /* BPC */
        tcg_gen_mov_i32(ret, cpu_bpc);
        break;
    case 10:    /* ISP */
        if (FIELD_EX32(ctx->tb_flags, PSW, U)) {
            tcg_gen_mov_i32(ret, cpu_isp);
        } else {
            tcg_gen_mov_i32(ret, cpu_sp);
        }
        break;
    case 11:    /* FINTV */
        tcg_gen_mov_i32(ret, cpu_fintv);
        break;
    case 12:    /* INTB */
        tcg_gen_mov_i32(ret, cpu_intb);
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR, "Unimplement control register %d", cr);
        /* Unimplement registers return 0 */
        tcg_gen_movi_i32(ret, 0);
        break;
    }
}

static void move_to_cr(DisasContext *ctx, TCGv val, int cr)
{
    if (cr >= 8 && !is_privileged(ctx, 0)) {
        /* Some control registers can only be written in privileged mode. */
        qemu_log_mask(LOG_GUEST_ERROR,
                      "disallow control register write %s", rx_crname(cr));
        return;
    }
    switch (cr) {
    case 0:     /* PSW */
        gen_helper_set_psw(tcg_env, val);
        if (is_privileged(ctx, 0)) {
            /* PSW.{I,U} may be updated here. exit TB. */
            ctx->base.is_jmp = DISAS_UPDATE;
        }
        break;
    /* case 1: to PC not supported */
    case 2:     /* USP */
        if (FIELD_EX32(ctx->tb_flags, PSW, U)) {
            tcg_gen_mov_i32(cpu_sp, val);
        } else {
            tcg_gen_mov_i32(cpu_usp, val);
        }
        break;
    case 3:     /* FPSW */
        gen_helper_set_fpsw(tcg_env, val);
        break;
    case 8:     /* BPSW */
        tcg_gen_mov_i32(cpu_bpsw, val);
        break;
    case 9:     /* BPC */
        tcg_gen_mov_i32(cpu_bpc, val);
        break;
    case 10:    /* ISP */
        if (FIELD_EX32(ctx->tb_flags, PSW, U)) {
            tcg_gen_mov_i32(cpu_isp, val);
        } else {
            tcg_gen_mov_i32(cpu_sp, val);
        }
        break;
    case 11:    /* FINTV */
        tcg_gen_mov_i32(cpu_fintv, val);
        break;
    case 12:    /* INTB */
        tcg_gen_mov_i32(cpu_intb, val);
        break;
    default:
        qemu_log_mask(LOG_GUEST_ERROR,
                      "Unimplement control register %d", cr);
        break;
    }
}

static void push(TCGv val)
{
    tcg_gen_subi_i32(cpu_sp, cpu_sp, 4);
    rx_gen_st(MO_32, val, cpu_sp);
}

static void pop(TCGv ret)
{
    rx_gen_ld(MO_32, ret, cpu_sp);
    tcg_gen_addi_i32(cpu_sp, cpu_sp, 4);
}

/* mov.<bwl> rs,dsp5[rd] */
static bool trans_MOV_rm(DisasContext *ctx, arg_MOV_rm *a)
{
    TCGv mem;
    mem = tcg_temp_new();
    tcg_gen_addi_i32(mem, cpu_regs[a->rd], a->dsp << a->sz);
    rx_gen_st(a->sz, cpu_regs[a->rs], mem);
    return true;
}

/* mov.<bwl> dsp5[rs],rd */
static bool trans_MOV_mr(DisasContext *ctx, arg_MOV_mr *a)
{
    TCGv mem;
    mem = tcg_temp_new();
    tcg_gen_addi_i32(mem, cpu_regs[a->rs], a->dsp << a->sz);
    rx_gen_ld(a->sz, cpu_regs[a->rd], mem);
    return true;
}

/* mov.l #uimm4,rd */
/* mov.l #uimm8,rd */
/* mov.l #imm,rd */
static bool trans_MOV_ir(DisasContext *ctx, arg_MOV_ir *a)
{
    tcg_gen_movi_i32(cpu_regs[a->rd], a->imm);
    return true;
}

/* mov.<bwl> #uimm8,dsp[rd] */
/* mov.<bwl> #imm, dsp[rd] */
static bool trans_MOV_im(DisasContext *ctx, arg_MOV_im *a)
{
    TCGv imm, mem;
    imm = tcg_constant_i32(a->imm);
    mem = tcg_temp_new();
    tcg_gen_addi_i32(mem, cpu_regs[a->rd], a->dsp << a->sz);
    rx_gen_st(a->sz, imm, mem);
    return true;
}

/* mov.<bwl> [ri,rb],rd */
static bool trans_MOV_ar(DisasContext *ctx, arg_MOV_ar *a)
{
    TCGv mem;
    mem = tcg_temp_new();
    rx_gen_regindex(ctx, mem, a->sz, a->ri, a->rb);
    rx_gen_ld(a->sz, cpu_regs[a->rd], mem);
    return true;
}

/* mov.<bwl> rd,[ri,rb] */
static bool trans_MOV_ra(DisasContext *ctx, arg_MOV_ra *a)
{
    TCGv mem;
    mem = tcg_temp_new();
    rx_gen_regindex(ctx, mem, a->sz, a->ri, a->rb);
    rx_gen_st(a->sz, cpu_regs[a->rs], mem);
    return true;
}

/* mov.<bwl> dsp[rs],dsp[rd] */
/* mov.<bwl> rs,dsp[rd] */
/* mov.<bwl> dsp[rs],rd */
/* mov.<bwl> rs,rd */
static bool trans_MOV_mm(DisasContext *ctx, arg_MOV_mm *a)
{
    TCGv tmp, mem, addr;

    if (a->lds == 3 && a->ldd == 3) {
        /* mov.<bwl> rs,rd */
        tcg_gen_ext_i32(cpu_regs[a->rd], cpu_regs[a->rs], a->sz | MO_SIGN);
        return true;
    }

    mem = tcg_temp_new();
    if (a->lds == 3) {
        /* mov.<bwl> rs,dsp[rd] */
        addr = rx_index_addr(ctx, mem, a->ldd, a->sz, a->rs);
        rx_gen_st(a->sz, cpu_regs[a->rd], addr);
    } else if (a->ldd == 3) {
        /* mov.<bwl> dsp[rs],rd */
        addr = rx_index_addr(ctx, mem, a->lds, a->sz, a->rs);
        rx_gen_ld(a->sz, cpu_regs[a->rd], addr);
    } else {
        /* mov.<bwl> dsp[rs],dsp[rd] */
        tmp = tcg_temp_new();
        addr = rx_index_addr(ctx, mem, a->lds, a->sz, a->rs);
        rx_gen_ld(a->sz, tmp, addr);
        addr = rx_index_addr(ctx, mem, a->ldd, a->sz, a->rd);
        rx_gen_st(a->sz, tmp, addr);
    }
    return true;
}

/* mov.<bwl> rs,[rd+] */
/* mov.<bwl> rs,[-rd] */
static bool trans_MOV_rp(DisasContext *ctx, arg_MOV_rp *a)
{
    TCGv val;
    val = tcg_temp_new();
    tcg_gen_mov_i32(val, cpu_regs[a->rs]);
    if (a->ad == 1) {
        tcg_gen_subi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1 << a->sz);
    }
    rx_gen_st(a->sz, val, cpu_regs[a->rd]);
    if (a->ad == 0) {
        tcg_gen_addi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1 << a->sz);
    }
    return true;
}

/* mov.<bwl> [rd+],rs */
/* mov.<bwl> [-rd],rs */
static bool trans_MOV_pr(DisasContext *ctx, arg_MOV_pr *a)
{
    TCGv val;
    val = tcg_temp_new();
    if (a->ad == 1) {
        tcg_gen_subi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1 << a->sz);
    }
    rx_gen_ld(a->sz, val, cpu_regs[a->rd]);
    if (a->ad == 0) {
        tcg_gen_addi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1 << a->sz);
    }
    tcg_gen_mov_i32(cpu_regs[a->rs], val);
    return true;
}

/* movu.<bw> dsp5[rs],rd */
/* movu.<bw> dsp[rs],rd */
static bool trans_MOVU_mr(DisasContext *ctx, arg_MOVU_mr *a)
{
    TCGv mem;
    mem = tcg_temp_new();
    tcg_gen_addi_i32(mem, cpu_regs[a->rs], a->dsp << a->sz);
    rx_gen_ldu(a->sz, cpu_regs[a->rd], mem);
    return true;
}

/* movu.<bw> rs,rd */
static bool trans_MOVU_rr(DisasContext *ctx, arg_MOVU_rr *a)
{
    tcg_gen_ext_i32(cpu_regs[a->rd], cpu_regs[a->rs], a->sz);
    return true;
}

/* movu.<bw> [ri,rb],rd */
static bool trans_MOVU_ar(DisasContext *ctx, arg_MOVU_ar *a)
{
    TCGv mem;
    mem = tcg_temp_new();
    rx_gen_regindex(ctx, mem, a->sz, a->ri, a->rb);
    rx_gen_ldu(a->sz, cpu_regs[a->rd], mem);
    return true;
}

/* movu.<bw> [rd+],rs */
/* mov.<bw> [-rd],rs */
static bool trans_MOVU_pr(DisasContext *ctx, arg_MOVU_pr *a)
{
    TCGv val;
    val = tcg_temp_new();
    if (a->ad == 1) {
        tcg_gen_subi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1 << a->sz);
    }
    rx_gen_ldu(a->sz, val, cpu_regs[a->rd]);
    if (a->ad == 0) {
        tcg_gen_addi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1 << a->sz);
    }
    tcg_gen_mov_i32(cpu_regs[a->rs], val);
    return true;
}


/* pop rd */
static bool trans_POP(DisasContext *ctx, arg_POP *a)
{
    /* mov.l [r0+], rd */
    arg_MOV_rp mov_a;
    mov_a.rd = 0;
    mov_a.rs = a->rd;
    mov_a.ad = 0;
    mov_a.sz = MO_32;
    trans_MOV_pr(ctx, &mov_a);
    return true;
}

/* popc cr */
static bool trans_POPC(DisasContext *ctx, arg_POPC *a)
{
    TCGv val;
    val = tcg_temp_new();
    pop(val);
    move_to_cr(ctx, val, a->cr);
    return true;
}

/* popm rd-rd2 */
static bool trans_POPM(DisasContext *ctx, arg_POPM *a)
{
    int r;
    if (a->rd == 0 || a->rd >= a->rd2) {
        qemu_log_mask(LOG_GUEST_ERROR,
                      "Invalid  register ranges r%d-r%d", a->rd, a->rd2);
    }
    r = a->rd;
    while (r <= a->rd2 && r < 16) {
        pop(cpu_regs[r++]);
    }
    return true;
}


/* push.<bwl> rs */
static bool trans_PUSH_r(DisasContext *ctx, arg_PUSH_r *a)
{
    TCGv val;
    val = tcg_temp_new();
    tcg_gen_mov_i32(val, cpu_regs[a->rs]);
    tcg_gen_subi_i32(cpu_sp, cpu_sp, 4);
    rx_gen_st(a->sz, val, cpu_sp);
    return true;
}

/* push.<bwl> dsp[rs] */
static bool trans_PUSH_m(DisasContext *ctx, arg_PUSH_m *a)
{
    TCGv mem, val, addr;
    mem = tcg_temp_new();
    val = tcg_temp_new();
    addr = rx_index_addr(ctx, mem, a->ld, a->sz, a->rs);
    rx_gen_ld(a->sz, val, addr);
    tcg_gen_subi_i32(cpu_sp, cpu_sp, 4);
    rx_gen_st(a->sz, val, cpu_sp);
    return true;
}

/* pushc rx */
static bool trans_PUSHC(DisasContext *ctx, arg_PUSHC *a)
{
    TCGv val;
    val = tcg_temp_new();
    move_from_cr(ctx, val, a->cr, ctx->pc);
    push(val);
    return true;
}

/* pushm rs-rs2 */
static bool trans_PUSHM(DisasContext *ctx, arg_PUSHM *a)
{
    int r;

    if (a->rs == 0 || a->rs >= a->rs2) {
        qemu_log_mask(LOG_GUEST_ERROR,
                      "Invalid  register ranges r%d-r%d", a->rs, a->rs2);
    }
    r = a->rs2;
    while (r >= a->rs && r >= 0) {
        push(cpu_regs[r--]);
    }
    return true;
}

/* xchg rs,rd */
static bool trans_XCHG_rr(DisasContext *ctx, arg_XCHG_rr *a)
{
    TCGv tmp;
    tmp = tcg_temp_new();
    tcg_gen_mov_i32(tmp, cpu_regs[a->rs]);
    tcg_gen_mov_i32(cpu_regs[a->rs], cpu_regs[a->rd]);
    tcg_gen_mov_i32(cpu_regs[a->rd], tmp);
    return true;
}

/* xchg dsp[rs].<mi>,rd */
static bool trans_XCHG_mr(DisasContext *ctx, arg_XCHG_mr *a)
{
    TCGv mem, addr;
    mem = tcg_temp_new();
    switch (a->mi) {
    case 0: /* dsp[rs].b */
    case 1: /* dsp[rs].w */
    case 2: /* dsp[rs].l */
        addr = rx_index_addr(ctx, mem, a->ld, a->mi, a->rs);
        break;
    case 3: /* dsp[rs].uw */
    case 4: /* dsp[rs].ub */
        addr = rx_index_addr(ctx, mem, a->ld, 4 - a->mi, a->rs);
        break;
    default:
        g_assert_not_reached();
    }
    tcg_gen_atomic_xchg_i32(cpu_regs[a->rd], addr, cpu_regs[a->rd],
                            0, mi_to_mop(a->mi));
    return true;
}

static inline void stcond(TCGCond cond, int rd, int imm)
{
    TCGv z;
    TCGv _imm;
    z = tcg_constant_i32(0);
    _imm = tcg_constant_i32(imm);
    tcg_gen_movcond_i32(cond, cpu_regs[rd], cpu_psw_z, z,
                        _imm, cpu_regs[rd]);
}

/* stz #imm,rd */
static bool trans_STZ(DisasContext *ctx, arg_STZ *a)
{
    stcond(TCG_COND_EQ, a->rd, a->imm);
    return true;
}

/* stnz #imm,rd */
static bool trans_STNZ(DisasContext *ctx, arg_STNZ *a)
{
    stcond(TCG_COND_NE, a->rd, a->imm);
    return true;
}

/* sccnd.<bwl> rd */
/* sccnd.<bwl> dsp:[rd] */
static bool trans_SCCnd(DisasContext *ctx, arg_SCCnd *a)
{
    DisasCompare dc;
    TCGv val, mem, addr;
    dc.temp = tcg_temp_new();
    psw_cond(&dc, a->cd);
    if (a->ld < 3) {
        val = tcg_temp_new();
        mem = tcg_temp_new();
        tcg_gen_setcondi_i32(dc.cond, val, dc.value, 0);
        addr = rx_index_addr(ctx, mem, a->sz, a->ld, a->rd);
        rx_gen_st(a->sz, val, addr);
    } else {
        tcg_gen_setcondi_i32(dc.cond, cpu_regs[a->rd], dc.value, 0);
    }
    return true;
}

/* rtsd #imm */
static bool trans_RTSD_i(DisasContext *ctx, arg_RTSD_i *a)
{
    tcg_gen_addi_i32(cpu_sp, cpu_sp, a->imm  << 2);
    pop(cpu_pc);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

/* rtsd #imm, rd-rd2 */
static bool trans_RTSD_irr(DisasContext *ctx, arg_RTSD_irr *a)
{
    int dst;
    int adj;

    if (a->rd2 >= a->rd) {
        adj = a->imm - (a->rd2 - a->rd + 1);
    } else {
        adj = a->imm - (15 - a->rd + 1);
    }

    tcg_gen_addi_i32(cpu_sp, cpu_sp, adj << 2);
    dst = a->rd;
    while (dst <= a->rd2 && dst < 16) {
        pop(cpu_regs[dst++]);
    }
    pop(cpu_pc);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

typedef void (*op2fn)(TCGv ret, TCGv arg1);
typedef void (*op3fn)(TCGv ret, TCGv arg1, TCGv arg2);

static inline void rx_gen_op_rr(op2fn opr, int dst, int src)
{
    opr(cpu_regs[dst], cpu_regs[src]);
}

static inline void rx_gen_op_rrr(op3fn opr, int dst, int src, int src2)
{
    opr(cpu_regs[dst], cpu_regs[src], cpu_regs[src2]);
}

static inline void rx_gen_op_irr(op3fn opr, int dst, int src, uint32_t src2)
{
    TCGv imm = tcg_constant_i32(src2);
    opr(cpu_regs[dst], cpu_regs[src], imm);
}

static inline void rx_gen_op_mr(op3fn opr, DisasContext *ctx,
                                int dst, int src, int ld, int mi)
{
    TCGv val, mem;
    mem = tcg_temp_new();
    val = rx_load_source(ctx, mem, ld, mi, src);
    opr(cpu_regs[dst], cpu_regs[dst], val);
}

static void rx_and(TCGv ret, TCGv arg1, TCGv arg2)
{
    tcg_gen_and_i32(cpu_psw_s, arg1, arg2);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
    tcg_gen_mov_i32(ret, cpu_psw_s);
}

/* and #uimm:4, rd */
/* and #imm, rd */
static bool trans_AND_ir(DisasContext *ctx, arg_AND_ir *a)
{
    rx_gen_op_irr(rx_and, a->rd, a->rd, a->imm);
    return true;
}

/* and dsp[rs], rd */
/* and rs,rd */
static bool trans_AND_mr(DisasContext *ctx, arg_AND_mr *a)
{
    rx_gen_op_mr(rx_and, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* and rs,rs2,rd */
static bool trans_AND_rrr(DisasContext *ctx, arg_AND_rrr *a)
{
    rx_gen_op_rrr(rx_and, a->rd, a->rs, a->rs2);
    return true;
}

static void rx_or(TCGv ret, TCGv arg1, TCGv arg2)
{
    tcg_gen_or_i32(cpu_psw_s, arg1, arg2);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
    tcg_gen_mov_i32(ret, cpu_psw_s);
}

/* or #uimm:4, rd */
/* or #imm, rd */
static bool trans_OR_ir(DisasContext *ctx, arg_OR_ir *a)
{
    rx_gen_op_irr(rx_or, a->rd, a->rd, a->imm);
    return true;
}

/* or dsp[rs], rd */
/* or rs,rd */
static bool trans_OR_mr(DisasContext *ctx, arg_OR_mr *a)
{
    rx_gen_op_mr(rx_or, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* or rs,rs2,rd */
static bool trans_OR_rrr(DisasContext *ctx, arg_OR_rrr *a)
{
    rx_gen_op_rrr(rx_or, a->rd, a->rs, a->rs2);
    return true;
}

static void rx_xor(TCGv ret, TCGv arg1, TCGv arg2)
{
    tcg_gen_xor_i32(cpu_psw_s, arg1, arg2);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
    tcg_gen_mov_i32(ret, cpu_psw_s);
}

/* xor #imm, rd */
static bool trans_XOR_ir(DisasContext *ctx, arg_XOR_ir *a)
{
    rx_gen_op_irr(rx_xor, a->rd, a->rd, a->imm);
    return true;
}

/* xor dsp[rs], rd */
/* xor rs,rd */
static bool trans_XOR_mr(DisasContext *ctx, arg_XOR_mr *a)
{
    rx_gen_op_mr(rx_xor, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

static void rx_tst(TCGv ret, TCGv arg1, TCGv arg2)
{
    tcg_gen_and_i32(cpu_psw_s, arg1, arg2);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
}

/* tst #imm, rd */
static bool trans_TST_ir(DisasContext *ctx, arg_TST_ir *a)
{
    rx_gen_op_irr(rx_tst, a->rd, a->rd, a->imm);
    return true;
}

/* tst dsp[rs], rd */
/* tst rs, rd */
static bool trans_TST_mr(DisasContext *ctx, arg_TST_mr *a)
{
    rx_gen_op_mr(rx_tst, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

static void rx_not(TCGv ret, TCGv arg1)
{
    tcg_gen_not_i32(ret, arg1);
    tcg_gen_mov_i32(cpu_psw_z, ret);
    tcg_gen_mov_i32(cpu_psw_s, ret);
}

/* not rd */
/* not rs, rd */
static bool trans_NOT_rr(DisasContext *ctx, arg_NOT_rr *a)
{
    rx_gen_op_rr(rx_not, a->rd, a->rs);
    return true;
}

static void rx_neg(TCGv ret, TCGv arg1)
{
    tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_psw_o, arg1, 0x80000000);
    tcg_gen_neg_i32(ret, arg1);
    tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_psw_c, ret, 0);
    tcg_gen_mov_i32(cpu_psw_z, ret);
    tcg_gen_mov_i32(cpu_psw_s, ret);
}


/* neg rd */
/* neg rs, rd */
static bool trans_NEG_rr(DisasContext *ctx, arg_NEG_rr *a)
{
    rx_gen_op_rr(rx_neg, a->rd, a->rs);
    return true;
}

/* ret = arg1 + arg2 + psw_c */
static void rx_adc(TCGv ret, TCGv arg1, TCGv arg2)
{
    TCGv z = tcg_constant_i32(0);
    tcg_gen_add2_i32(cpu_psw_s, cpu_psw_c, arg1, z, cpu_psw_c, z);
    tcg_gen_add2_i32(cpu_psw_s, cpu_psw_c, cpu_psw_s, cpu_psw_c, arg2, z);
    tcg_gen_xor_i32(cpu_psw_o, cpu_psw_s, arg1);
    tcg_gen_xor_i32(cpu_psw_z, arg1, arg2);
    tcg_gen_andc_i32(cpu_psw_o, cpu_psw_o, cpu_psw_z);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
    tcg_gen_mov_i32(ret, cpu_psw_s);
}

/* adc #imm, rd */
static bool trans_ADC_ir(DisasContext *ctx, arg_ADC_ir *a)
{
    rx_gen_op_irr(rx_adc, a->rd, a->rd, a->imm);
    return true;
}

/* adc rs, rd */
static bool trans_ADC_rr(DisasContext *ctx, arg_ADC_rr *a)
{
    rx_gen_op_rrr(rx_adc, a->rd, a->rd, a->rs);
    return true;
}

/* adc dsp[rs], rd */
static bool trans_ADC_mr(DisasContext *ctx, arg_ADC_mr *a)
{
    /* mi only 2 */
    if (a->mi != 2) {
        return false;
    }
    rx_gen_op_mr(rx_adc, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* ret = arg1 + arg2 */
static void rx_add(TCGv ret, TCGv arg1, TCGv arg2)
{
    TCGv z = tcg_constant_i32(0);
    tcg_gen_add2_i32(cpu_psw_s, cpu_psw_c, arg1, z, arg2, z);
    tcg_gen_xor_i32(cpu_psw_o, cpu_psw_s, arg1);
    tcg_gen_xor_i32(cpu_psw_z, arg1, arg2);
    tcg_gen_andc_i32(cpu_psw_o, cpu_psw_o, cpu_psw_z);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
    tcg_gen_mov_i32(ret, cpu_psw_s);
}

/* add #uimm4, rd */
/* add #imm, rs, rd */
static bool trans_ADD_irr(DisasContext *ctx, arg_ADD_irr *a)
{
    rx_gen_op_irr(rx_add, a->rd, a->rs2, a->imm);
    return true;
}

/* add rs, rd */
/* add dsp[rs], rd */
static bool trans_ADD_mr(DisasContext *ctx, arg_ADD_mr *a)
{
    rx_gen_op_mr(rx_add, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* add rs, rs2, rd */
static bool trans_ADD_rrr(DisasContext *ctx, arg_ADD_rrr *a)
{
    rx_gen_op_rrr(rx_add, a->rd, a->rs, a->rs2);
    return true;
}

/* ret = arg1 - arg2 */
static void rx_sub(TCGv ret, TCGv arg1, TCGv arg2)
{
    tcg_gen_sub_i32(cpu_psw_s, arg1, arg2);
    tcg_gen_setcond_i32(TCG_COND_GEU, cpu_psw_c, arg1, arg2);
    tcg_gen_xor_i32(cpu_psw_o, cpu_psw_s, arg1);
    tcg_gen_xor_i32(cpu_psw_z, arg1, arg2);
    tcg_gen_and_i32(cpu_psw_o, cpu_psw_o, cpu_psw_z);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_s);
    /* CMP not required return */
    if (ret) {
        tcg_gen_mov_i32(ret, cpu_psw_s);
    }
}

static void rx_cmp(TCGv dummy, TCGv arg1, TCGv arg2)
{
    rx_sub(NULL, arg1, arg2);
}

/* ret = arg1 - arg2 - !psw_c */
/* -> ret = arg1 + ~arg2 + psw_c */
static void rx_sbb(TCGv ret, TCGv arg1, TCGv arg2)
{
    TCGv temp;
    temp = tcg_temp_new();
    tcg_gen_not_i32(temp, arg2);
    rx_adc(ret, arg1, temp);
}

/* cmp #imm4, rs2 */
/* cmp #imm8, rs2 */
/* cmp #imm, rs2 */
static bool trans_CMP_ir(DisasContext *ctx, arg_CMP_ir *a)
{
    rx_gen_op_irr(rx_cmp, 0, a->rs2, a->imm);
    return true;
}

/* cmp rs, rs2 */
/* cmp dsp[rs], rs2 */
static bool trans_CMP_mr(DisasContext *ctx, arg_CMP_mr *a)
{
    rx_gen_op_mr(rx_cmp, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* sub #imm4, rd */
static bool trans_SUB_ir(DisasContext *ctx, arg_SUB_ir *a)
{
    rx_gen_op_irr(rx_sub, a->rd, a->rd, a->imm);
    return true;
}

/* sub rs, rd */
/* sub dsp[rs], rd */
static bool trans_SUB_mr(DisasContext *ctx, arg_SUB_mr *a)
{
    rx_gen_op_mr(rx_sub, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* sub rs2, rs, rd */
static bool trans_SUB_rrr(DisasContext *ctx, arg_SUB_rrr *a)
{
    rx_gen_op_rrr(rx_sub, a->rd, a->rs2, a->rs);
    return true;
}

/* sbb rs, rd */
static bool trans_SBB_rr(DisasContext *ctx, arg_SBB_rr *a)
{
    rx_gen_op_rrr(rx_sbb, a->rd, a->rd, a->rs);
    return true;
}

/* sbb dsp[rs], rd */
static bool trans_SBB_mr(DisasContext *ctx, arg_SBB_mr *a)
{
    /* mi only 2 */
    if (a->mi != 2) {
        return false;
    }
    rx_gen_op_mr(rx_sbb, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* abs rd */
/* abs rs, rd */
static bool trans_ABS_rr(DisasContext *ctx, arg_ABS_rr *a)
{
    rx_gen_op_rr(tcg_gen_abs_i32, a->rd, a->rs);
    return true;
}

/* max #imm, rd */
static bool trans_MAX_ir(DisasContext *ctx, arg_MAX_ir *a)
{
    rx_gen_op_irr(tcg_gen_smax_i32, a->rd, a->rd, a->imm);
    return true;
}

/* max rs, rd */
/* max dsp[rs], rd */
static bool trans_MAX_mr(DisasContext *ctx, arg_MAX_mr *a)
{
    rx_gen_op_mr(tcg_gen_smax_i32, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* min #imm, rd */
static bool trans_MIN_ir(DisasContext *ctx, arg_MIN_ir *a)
{
    rx_gen_op_irr(tcg_gen_smin_i32, a->rd, a->rd, a->imm);
    return true;
}

/* min rs, rd */
/* min dsp[rs], rd */
static bool trans_MIN_mr(DisasContext *ctx, arg_MIN_mr *a)
{
    rx_gen_op_mr(tcg_gen_smin_i32, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* mul #uimm4, rd */
/* mul #imm, rd */
static bool trans_MUL_ir(DisasContext *ctx, arg_MUL_ir *a)
{
    rx_gen_op_irr(tcg_gen_mul_i32, a->rd, a->rd, a->imm);
    return true;
}

/* mul rs, rd */
/* mul dsp[rs], rd */
static bool trans_MUL_mr(DisasContext *ctx, arg_MUL_mr *a)
{
    rx_gen_op_mr(tcg_gen_mul_i32, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* mul rs, rs2, rd */
static bool trans_MUL_rrr(DisasContext *ctx, arg_MUL_rrr *a)
{
    rx_gen_op_rrr(tcg_gen_mul_i32, a->rd, a->rs, a->rs2);
    return true;
}

/* emul #imm, rd */
static bool trans_EMUL_ir(DisasContext *ctx, arg_EMUL_ir *a)
{
    TCGv imm = tcg_constant_i32(a->imm);
    if (a->rd > 14) {
        qemu_log_mask(LOG_GUEST_ERROR, "rd too large %d", a->rd);
    }
    tcg_gen_muls2_i32(cpu_regs[a->rd], cpu_regs[(a->rd + 1) & 15],
                      cpu_regs[a->rd], imm);
    return true;
}

/* emul rs, rd */
/* emul dsp[rs], rd */
static bool trans_EMUL_mr(DisasContext *ctx, arg_EMUL_mr *a)
{
    TCGv val, mem;
    if (a->rd > 14) {
        qemu_log_mask(LOG_GUEST_ERROR, "rd too large %d", a->rd);
    }
    mem = tcg_temp_new();
    val = rx_load_source(ctx, mem, a->ld, a->mi, a->rs);
    tcg_gen_muls2_i32(cpu_regs[a->rd], cpu_regs[(a->rd + 1) & 15],
                      cpu_regs[a->rd], val);
    return true;
}

/* emulu #imm, rd */
static bool trans_EMULU_ir(DisasContext *ctx, arg_EMULU_ir *a)
{
    TCGv imm = tcg_constant_i32(a->imm);
    if (a->rd > 14) {
        qemu_log_mask(LOG_GUEST_ERROR, "rd too large %d", a->rd);
    }
    tcg_gen_mulu2_i32(cpu_regs[a->rd], cpu_regs[(a->rd + 1) & 15],
                      cpu_regs[a->rd], imm);
    return true;
}

/* emulu rs, rd */
/* emulu dsp[rs], rd */
static bool trans_EMULU_mr(DisasContext *ctx, arg_EMULU_mr *a)
{
    TCGv val, mem;
    if (a->rd > 14) {
        qemu_log_mask(LOG_GUEST_ERROR, "rd too large %d", a->rd);
    }
    mem = tcg_temp_new();
    val = rx_load_source(ctx, mem, a->ld, a->mi, a->rs);
    tcg_gen_mulu2_i32(cpu_regs[a->rd], cpu_regs[(a->rd + 1) & 15],
                      cpu_regs[a->rd], val);
    return true;
}

static void rx_div(TCGv ret, TCGv arg1, TCGv arg2)
{
    gen_helper_div(ret, tcg_env, arg1, arg2);
}

static void rx_divu(TCGv ret, TCGv arg1, TCGv arg2)
{
    gen_helper_divu(ret, tcg_env, arg1, arg2);
}

/* div #imm, rd */
static bool trans_DIV_ir(DisasContext *ctx, arg_DIV_ir *a)
{
    rx_gen_op_irr(rx_div, a->rd, a->rd, a->imm);
    return true;
}

/* div rs, rd */
/* div dsp[rs], rd */
static bool trans_DIV_mr(DisasContext *ctx, arg_DIV_mr *a)
{
    rx_gen_op_mr(rx_div, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}

/* divu #imm, rd */
static bool trans_DIVU_ir(DisasContext *ctx, arg_DIVU_ir *a)
{
    rx_gen_op_irr(rx_divu, a->rd, a->rd, a->imm);
    return true;
}

/* divu rs, rd */
/* divu dsp[rs], rd */
static bool trans_DIVU_mr(DisasContext *ctx, arg_DIVU_mr *a)
{
    rx_gen_op_mr(rx_divu, ctx, a->rd, a->rs, a->ld, a->mi);
    return true;
}


/* shll #imm:5, rd */
/* shll #imm:5, rs2, rd */
static bool trans_SHLL_irr(DisasContext *ctx, arg_SHLL_irr *a)
{
    TCGv tmp;
    tmp = tcg_temp_new();
    if (a->imm) {
        tcg_gen_sari_i32(cpu_psw_c, cpu_regs[a->rs2], 32 - a->imm);
        tcg_gen_shli_i32(cpu_regs[a->rd], cpu_regs[a->rs2], a->imm);
        tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_psw_o, cpu_psw_c, 0);
        tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, cpu_psw_c, 0xffffffff);
        tcg_gen_or_i32(cpu_psw_o, cpu_psw_o, tmp);
        tcg_gen_setcondi_i32(TCG_COND_NE, cpu_psw_c, cpu_psw_c, 0);
    } else {
        tcg_gen_mov_i32(cpu_regs[a->rd], cpu_regs[a->rs2]);
        tcg_gen_movi_i32(cpu_psw_c, 0);
        tcg_gen_movi_i32(cpu_psw_o, 0);
    }
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[a->rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[a->rd]);
    return true;
}

/* shll rs, rd */
static bool trans_SHLL_rr(DisasContext *ctx, arg_SHLL_rr *a)
{
    TCGLabel *noshift, *done;
    TCGv count, tmp;

    noshift = gen_new_label();
    done = gen_new_label();
    /* if (cpu_regs[a->rs]) { */
    tcg_gen_brcondi_i32(TCG_COND_EQ, cpu_regs[a->rs], 0, noshift);
    count = tcg_temp_new();
    tmp = tcg_temp_new();
    tcg_gen_andi_i32(tmp, cpu_regs[a->rs], 31);
    tcg_gen_sub_i32(count, tcg_constant_i32(32), tmp);
    tcg_gen_sar_i32(cpu_psw_c, cpu_regs[a->rd], count);
    tcg_gen_shl_i32(cpu_regs[a->rd], cpu_regs[a->rd], tmp);
    tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_psw_o, cpu_psw_c, 0);
    tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, cpu_psw_c, 0xffffffff);
    tcg_gen_or_i32(cpu_psw_o, cpu_psw_o, tmp);
    tcg_gen_setcondi_i32(TCG_COND_NE, cpu_psw_c, cpu_psw_c, 0);
    tcg_gen_br(done);
    /* } else { */
    gen_set_label(noshift);
    tcg_gen_movi_i32(cpu_psw_c, 0);
    tcg_gen_movi_i32(cpu_psw_o, 0);
    /* } */
    gen_set_label(done);
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[a->rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[a->rd]);
    return true;
}

static inline void shiftr_imm(uint32_t rd, uint32_t rs, uint32_t imm,
                              unsigned int alith)
{
    static void (* const gen_sXri[])(TCGv ret, TCGv arg1, int arg2) = {
        tcg_gen_shri_i32, tcg_gen_sari_i32,
    };
    tcg_debug_assert(alith < 2);
    if (imm) {
        gen_sXri[alith](cpu_regs[rd], cpu_regs[rs], imm - 1);
        tcg_gen_andi_i32(cpu_psw_c, cpu_regs[rd], 0x00000001);
        gen_sXri[alith](cpu_regs[rd], cpu_regs[rd], 1);
    } else {
        tcg_gen_mov_i32(cpu_regs[rd], cpu_regs[rs]);
        tcg_gen_movi_i32(cpu_psw_c, 0);
    }
    tcg_gen_movi_i32(cpu_psw_o, 0);
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[rd]);
}

static inline void shiftr_reg(uint32_t rd, uint32_t rs, unsigned int alith)
{
    TCGLabel *noshift, *done;
    TCGv count;
    static void (* const gen_sXri[])(TCGv ret, TCGv arg1, int arg2) = {
        tcg_gen_shri_i32, tcg_gen_sari_i32,
    };
    static void (* const gen_sXr[])(TCGv ret, TCGv arg1, TCGv arg2) = {
        tcg_gen_shr_i32, tcg_gen_sar_i32,
    };
    tcg_debug_assert(alith < 2);
    noshift = gen_new_label();
    done = gen_new_label();
    count = tcg_temp_new();
    /* if (cpu_regs[rs]) { */
    tcg_gen_brcondi_i32(TCG_COND_EQ, cpu_regs[rs], 0, noshift);
    tcg_gen_andi_i32(count, cpu_regs[rs], 31);
    tcg_gen_subi_i32(count, count, 1);
    gen_sXr[alith](cpu_regs[rd], cpu_regs[rd], count);
    tcg_gen_andi_i32(cpu_psw_c, cpu_regs[rd], 0x00000001);
    gen_sXri[alith](cpu_regs[rd], cpu_regs[rd], 1);
    tcg_gen_br(done);
    /* } else { */
    gen_set_label(noshift);
    tcg_gen_movi_i32(cpu_psw_c, 0);
    /* } */
    gen_set_label(done);
    tcg_gen_movi_i32(cpu_psw_o, 0);
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[rd]);
}

/* shar #imm:5, rd */
/* shar #imm:5, rs2, rd */
static bool trans_SHAR_irr(DisasContext *ctx, arg_SHAR_irr *a)
{
    shiftr_imm(a->rd, a->rs2, a->imm, 1);
    return true;
}

/* shar rs, rd */
static bool trans_SHAR_rr(DisasContext *ctx, arg_SHAR_rr *a)
{
    shiftr_reg(a->rd, a->rs, 1);
    return true;
}

/* shlr #imm:5, rd */
/* shlr #imm:5, rs2, rd */
static bool trans_SHLR_irr(DisasContext *ctx, arg_SHLR_irr *a)
{
    shiftr_imm(a->rd, a->rs2, a->imm, 0);
    return true;
}

/* shlr rs, rd */
static bool trans_SHLR_rr(DisasContext *ctx, arg_SHLR_rr *a)
{
    shiftr_reg(a->rd, a->rs, 0);
    return true;
}

/* rolc rd */
static bool trans_ROLC(DisasContext *ctx, arg_ROLC *a)
{
    TCGv tmp;
    tmp = tcg_temp_new();
    tcg_gen_shri_i32(tmp, cpu_regs[a->rd], 31);
    tcg_gen_shli_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1);
    tcg_gen_or_i32(cpu_regs[a->rd], cpu_regs[a->rd], cpu_psw_c);
    tcg_gen_mov_i32(cpu_psw_c, tmp);
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[a->rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[a->rd]);
    return true;
}

/* rorc rd */
static bool trans_RORC(DisasContext *ctx, arg_RORC *a)
{
    TCGv tmp;
    tmp = tcg_temp_new();
    tcg_gen_andi_i32(tmp, cpu_regs[a->rd], 0x00000001);
    tcg_gen_shri_i32(cpu_regs[a->rd], cpu_regs[a->rd], 1);
    tcg_gen_shli_i32(cpu_psw_c, cpu_psw_c, 31);
    tcg_gen_or_i32(cpu_regs[a->rd], cpu_regs[a->rd], cpu_psw_c);
    tcg_gen_mov_i32(cpu_psw_c, tmp);
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[a->rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[a->rd]);
    return true;
}

enum {ROTR = 0, ROTL = 1};
enum {ROT_IMM = 0, ROT_REG = 1};
static inline void rx_rot(int ir, int dir, int rd, int src)
{
    switch (dir) {
    case ROTL:
        if (ir == ROT_IMM) {
            tcg_gen_rotli_i32(cpu_regs[rd], cpu_regs[rd], src);
        } else {
            tcg_gen_rotl_i32(cpu_regs[rd], cpu_regs[rd], cpu_regs[src]);
        }
        tcg_gen_andi_i32(cpu_psw_c, cpu_regs[rd], 0x00000001);
        break;
    case ROTR:
        if (ir == ROT_IMM) {
            tcg_gen_rotri_i32(cpu_regs[rd], cpu_regs[rd], src);
        } else {
            tcg_gen_rotr_i32(cpu_regs[rd], cpu_regs[rd], cpu_regs[src]);
        }
        tcg_gen_shri_i32(cpu_psw_c, cpu_regs[rd], 31);
        break;
    }
    tcg_gen_mov_i32(cpu_psw_z, cpu_regs[rd]);
    tcg_gen_mov_i32(cpu_psw_s, cpu_regs[rd]);
}

/* rotl #imm, rd */
static bool trans_ROTL_ir(DisasContext *ctx, arg_ROTL_ir *a)
{
    rx_rot(ROT_IMM, ROTL, a->rd, a->imm);
    return true;
}

/* rotl rs, rd */
static bool trans_ROTL_rr(DisasContext *ctx, arg_ROTL_rr *a)
{
    rx_rot(ROT_REG, ROTL, a->rd, a->rs);
    return true;
}

/* rotr #imm, rd */
static bool trans_ROTR_ir(DisasContext *ctx, arg_ROTR_ir *a)
{
    rx_rot(ROT_IMM, ROTR, a->rd, a->imm);
    return true;
}

/* rotr rs, rd */
static bool trans_ROTR_rr(DisasContext *ctx, arg_ROTR_rr *a)
{
    rx_rot(ROT_REG, ROTR, a->rd, a->rs);
    return true;
}

/* revl rs, rd */
static bool trans_REVL(DisasContext *ctx, arg_REVL *a)
{
    tcg_gen_bswap32_i32(cpu_regs[a->rd], cpu_regs[a->rs]);
    return true;
}

/* revw rs, rd */
static bool trans_REVW(DisasContext *ctx, arg_REVW *a)
{
    TCGv tmp;
    tmp = tcg_temp_new();
    tcg_gen_andi_i32(tmp, cpu_regs[a->rs], 0x00ff00ff);
    tcg_gen_shli_i32(tmp, tmp, 8);
    tcg_gen_shri_i32(cpu_regs[a->rd], cpu_regs[a->rs], 8);
    tcg_gen_andi_i32(cpu_regs[a->rd], cpu_regs[a->rd], 0x00ff00ff);
    tcg_gen_or_i32(cpu_regs[a->rd], cpu_regs[a->rd], tmp);
    return true;
}

/* conditional branch helper */
static void rx_bcnd_main(DisasContext *ctx, int cd, int dst)
{
    DisasCompare dc;
    TCGLabel *t, *done;

    switch (cd) {
    case 0 ... 13:
        dc.temp = tcg_temp_new();
        psw_cond(&dc, cd);
        t = gen_new_label();
        done = gen_new_label();
        tcg_gen_brcondi_i32(dc.cond, dc.value, 0, t);
        gen_goto_tb(ctx, 0, ctx->base.pc_next);
        tcg_gen_br(done);
        gen_set_label(t);
        gen_goto_tb(ctx, 1, ctx->pc + dst);
        gen_set_label(done);
        break;
    case 14:
        /* always true case */
        gen_goto_tb(ctx, 0, ctx->pc + dst);
        break;
    case 15:
        /* always false case */
        /* Nothing do */
        break;
    }
}

/* beq dsp:3 / bne dsp:3 */
/* beq dsp:8 / bne dsp:8 */
/* bc dsp:8 / bnc dsp:8 */
/* bgtu dsp:8 / bleu dsp:8 */
/* bpz dsp:8 / bn dsp:8 */
/* bge dsp:8 / blt dsp:8 */
/* bgt dsp:8 / ble dsp:8 */
/* bo dsp:8 / bno dsp:8 */
/* beq dsp:16 / bne dsp:16 */
static bool trans_BCnd(DisasContext *ctx, arg_BCnd *a)
{
    rx_bcnd_main(ctx, a->cd, a->dsp);
    return true;
}

/* bra dsp:3 */
/* bra dsp:8 */
/* bra dsp:16 */
/* bra dsp:24 */
static bool trans_BRA(DisasContext *ctx, arg_BRA *a)
{
    rx_bcnd_main(ctx, 14, a->dsp);
    return true;
}

/* bra rs */
static bool trans_BRA_l(DisasContext *ctx, arg_BRA_l *a)
{
    tcg_gen_addi_i32(cpu_pc, cpu_regs[a->rd], ctx->pc);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

static inline void rx_save_pc(DisasContext *ctx)
{
    TCGv pc = tcg_constant_i32(ctx->base.pc_next);
    push(pc);
}

/* jmp rs */
static bool trans_JMP(DisasContext *ctx, arg_JMP *a)
{
    tcg_gen_mov_i32(cpu_pc, cpu_regs[a->rs]);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

/* jsr rs */
static bool trans_JSR(DisasContext *ctx, arg_JSR *a)
{
    rx_save_pc(ctx);
    tcg_gen_mov_i32(cpu_pc, cpu_regs[a->rs]);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

/* bsr dsp:16 */
/* bsr dsp:24 */
static bool trans_BSR(DisasContext *ctx, arg_BSR *a)
{
    rx_save_pc(ctx);
    rx_bcnd_main(ctx, 14, a->dsp);
    return true;
}

/* bsr rs */
static bool trans_BSR_l(DisasContext *ctx, arg_BSR_l *a)
{
    rx_save_pc(ctx);
    tcg_gen_addi_i32(cpu_pc, cpu_regs[a->rd], ctx->pc);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

/* rts */
static bool trans_RTS(DisasContext *ctx, arg_RTS *a)
{
    pop(cpu_pc);
    ctx->base.is_jmp = DISAS_JUMP;
    return true;
}

/* nop */
static bool trans_NOP(DisasContext *ctx, arg_NOP *a)
{
    return true;
}

/* scmpu */
static bool trans_SCMPU(DisasContext *ctx, arg_SCMPU *a)
{
    gen_helper_scmpu(tcg_env);
    return true;
}

/* smovu */
static bool trans_SMOVU(DisasContext *ctx, arg_SMOVU *a)
{
    gen_helper_smovu(tcg_env);
    return true;
}

/* smovf */
static bool trans_SMOVF(DisasContext *ctx, arg_SMOVF *a)
{
    gen_helper_smovf(tcg_env);
    return true;
}

/* smovb */
static bool trans_SMOVB(DisasContext *ctx, arg_SMOVB *a)
{
    gen_helper_smovb(tcg_env);
    return true;
}

#define STRING(op)                              \
    do {                                        \
        TCGv size = tcg_constant_i32(a->sz);    \
        gen_helper_##op(tcg_env, size);         \
    } while (0)

/* suntile.<bwl> */
static bool trans_SUNTIL(DisasContext *ctx, arg_SUNTIL *a)
{
    STRING(suntil);
    return true;
}

/* swhile.<bwl> */
static bool trans_SWHILE(DisasContext *ctx, arg_SWHILE *a)
{
    STRING(swhile);
    return true;
}
/* sstr.<bwl> */
static bool trans_SSTR(DisasContext *ctx, arg_SSTR *a)
{
    STRING(sstr);
    return true;
}

/* rmpa.<bwl> */
static bool trans_RMPA(DisasContext *ctx, arg_RMPA *a)
{
    STRING(rmpa);
    return true;
}

static void rx_mul64hi(TCGv_i64 ret, int rs, int rs2)
{
    TCGv_i64 tmp0, tmp1;
    tmp0 = tcg_temp_new_i64();
    tmp1 = tcg_temp_new_i64();
    tcg_gen_ext_i32_i64(tmp0, cpu_regs[rs]);
    tcg_gen_sari_i64(tmp0, tmp0, 16);
    tcg_gen_ext_i32_i64(tmp1, cpu_regs[rs2]);
    tcg_gen_sari_i64(tmp1, tmp1, 16);
    tcg_gen_mul_i64(ret, tmp0, tmp1);
    tcg_gen_shli_i64(ret, ret, 16);
}

static void rx_mul64lo(TCGv_i64 ret, int rs, int rs2)
{
    TCGv_i64 tmp0, tmp1;
    tmp0 = tcg_temp_new_i64();
    tmp1 = tcg_temp_new_i64();
    tcg_gen_ext_i32_i64(tmp0, cpu_regs[rs]);
    tcg_gen_ext16s_i64(tmp0, tmp0);
    tcg_gen_ext_i32_i64(tmp1, cpu_regs[rs2]);
    tcg_gen_ext16s_i64(tmp1, tmp1);
    tcg_gen_mul_i64(ret, tmp0, tmp1);
    tcg_gen_shli_i64(ret, ret, 16);
}

/* mulhi rs,rs2 */
static bool trans_MULHI(DisasContext *ctx, arg_MULHI *a)
{
    rx_mul64hi(cpu_acc, a->rs, a->rs2);
    return true;
}

/* mullo rs,rs2 */
static bool trans_MULLO(DisasContext *ctx, arg_MULLO *a)
{
    rx_mul64lo(cpu_acc, a->rs, a->rs2);
    return true;
}

/* machi rs,rs2 */
static bool trans_MACHI(DisasContext *ctx, arg_MACHI *a)
{
    TCGv_i64 tmp;
    tmp = tcg_temp_new_i64();
    rx_mul64hi(tmp, a->rs, a->rs2);
    tcg_gen_add_i64(cpu_acc, cpu_acc, tmp);
    return true;
}

/* maclo rs,rs2 */
static bool trans_MACLO(DisasContext *ctx, arg_MACLO *a)
{
    TCGv_i64 tmp;
    tmp = tcg_temp_new_i64();
    rx_mul64lo(tmp, a->rs, a->rs2);
    tcg_gen_add_i64(cpu_acc, cpu_acc, tmp);
    return true;
}

/* mvfachi rd */
static bool trans_MVFACHI(DisasContext *ctx, arg_MVFACHI *a)
{
    tcg_gen_extrh_i64_i32(cpu_regs[a->rd], cpu_acc);
    return true;
}

/* mvfacmi rd */
static bool trans_MVFACMI(DisasContext *ctx, arg_MVFACMI *a)
{
    TCGv_i64 rd64;
    rd64 = tcg_temp_new_i64();
    tcg_gen_extract_i64(rd64, cpu_acc, 16, 32);
    tcg_gen_extrl_i64_i32(cpu_regs[a->rd], rd64);
    return true;
}

/* mvtachi rs */
static bool trans_MVTACHI(DisasContext *ctx, arg_MVTACHI *a)
{
    TCGv_i64 rs64;
    rs64 = tcg_temp_new_i64();
    tcg_gen_extu_i32_i64(rs64, cpu_regs[a->rs]);
    tcg_gen_deposit_i64(cpu_acc, cpu_acc, rs64, 32, 32);
    return true;
}

/* mvtaclo rs */
static bool trans_MVTACLO(DisasContext *ctx, arg_MVTACLO *a)
{
    TCGv_i64 rs64;
    rs64 = tcg_temp_new_i64();
    tcg_gen_extu_i32_i64(rs64, cpu_regs[a->rs]);
    tcg_gen_deposit_i64(cpu_acc, cpu_acc, rs64, 0, 32);
    return true;
}

/* racw #imm */
static bool trans_RACW(DisasContext *ctx, arg_RACW *a)
{
    TCGv imm = tcg_constant_i32(a->imm + 1);
    gen_helper_racw(tcg_env, imm);
    return true;
}

/* sat rd */
static bool trans_SAT(DisasContext *ctx, arg_SAT *a)
{
    TCGv tmp, z;
    tmp = tcg_temp_new();
    z = tcg_constant_i32(0);
    /* S == 1 -> 0xffffffff / S == 0 -> 0x00000000 */
    tcg_gen_sari_i32(tmp, cpu_psw_s, 31);
    /* S == 1 -> 0x7fffffff / S == 0 -> 0x80000000 */
    tcg_gen_xori_i32(tmp, tmp, 0x80000000);
    tcg_gen_movcond_i32(TCG_COND_LT, cpu_regs[a->rd],
                        cpu_psw_o, z, tmp, cpu_regs[a->rd]);
    return true;
}

/* satr */
static bool trans_SATR(DisasContext *ctx, arg_SATR *a)
{
    gen_helper_satr(tcg_env);
    return true;
}

#define cat3(a, b, c) a##b##c
#define FOP(name, op)                                                   \
    static bool cat3(trans_, name, _ir)(DisasContext *ctx,              \
                                        cat3(arg_, name, _ir) * a)      \
    {                                                                   \
        TCGv imm = tcg_constant_i32(li(ctx, 0));                        \
        gen_helper_##op(cpu_regs[a->rd], tcg_env,                       \
                        cpu_regs[a->rd], imm);                          \
        return true;                                                    \
    }                                                                   \
    static bool cat3(trans_, name, _mr)(DisasContext *ctx,              \
                                        cat3(arg_, name, _mr) * a)      \
    {                                                                   \
        TCGv val, mem;                                                  \
        mem = tcg_temp_new();                                           \
        val = rx_load_source(ctx, mem, a->ld, MO_32, a->rs);            \
        gen_helper_##op(cpu_regs[a->rd], tcg_env,                       \
                        cpu_regs[a->rd], val);                          \
        return true;                                                    \
    }

#define FCONVOP(name, op)                                       \
    static bool trans_##name(DisasContext *ctx, arg_##name * a) \
    {                                                           \
        TCGv val, mem;                                          \
        mem = tcg_temp_new();                                   \
        val = rx_load_source(ctx, mem, a->ld, MO_32, a->rs);    \
        gen_helper_##op(cpu_regs[a->rd], tcg_env, val);         \
        return true;                                            \
    }

FOP(FADD, fadd)
FOP(FSUB, fsub)
FOP(FMUL, fmul)
FOP(FDIV, fdiv)

/* fcmp #imm, rd */
static bool trans_FCMP_ir(DisasContext *ctx, arg_FCMP_ir * a)
{
    TCGv imm = tcg_constant_i32(li(ctx, 0));
    gen_helper_fcmp(tcg_env, cpu_regs[a->rd], imm);
    return true;
}

/* fcmp dsp[rs], rd */
/* fcmp rs, rd */
static bool trans_FCMP_mr(DisasContext *ctx, arg_FCMP_mr *a)
{
    TCGv val, mem;
    mem = tcg_temp_new();
    val = rx_load_source(ctx, mem, a->ld, MO_32, a->rs);
    gen_helper_fcmp(tcg_env, cpu_regs[a->rd], val);
    return true;
}

FCONVOP(FTOI, ftoi)
FCONVOP(ROUND, round)

/* itof rs, rd */
/* itof dsp[rs], rd */
static bool trans_ITOF(DisasContext *ctx, arg_ITOF * a)
{
    TCGv val, mem;
    mem = tcg_temp_new();
    val = rx_load_source(ctx, mem, a->ld, a->mi, a->rs);
    gen_helper_itof(cpu_regs[a->rd], tcg_env, val);
    return true;
}

static void rx_bsetm(TCGv mem, TCGv mask)
{
    TCGv val;
    val = tcg_temp_new();
    rx_gen_ld(MO_8, val, mem);
    tcg_gen_or_i32(val, val, mask);
    rx_gen_st(MO_8, val, mem);
}

static void rx_bclrm(TCGv mem, TCGv mask)
{
    TCGv val;
    val = tcg_temp_new();
    rx_gen_ld(MO_8, val, mem);
    tcg_gen_andc_i32(val, val, mask);
    rx_gen_st(MO_8, val, mem);
}

static void rx_btstm(TCGv mem, TCGv mask)
{
    TCGv val;
    val = tcg_temp_new();
    rx_gen_ld(MO_8, val, mem);
    tcg_gen_and_i32(val, val, mask);
    tcg_gen_setcondi_i32(TCG_COND_NE, cpu_psw_c, val, 0);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_c);
}

static void rx_bnotm(TCGv mem, TCGv mask)
{
    TCGv val;
    val = tcg_temp_new();
    rx_gen_ld(MO_8, val, mem);
    tcg_gen_xor_i32(val, val, mask);
    rx_gen_st(MO_8, val, mem);
}

static void rx_bsetr(TCGv reg, TCGv mask)
{
    tcg_gen_or_i32(reg, reg, mask);
}

static void rx_bclrr(TCGv reg, TCGv mask)
{
    tcg_gen_andc_i32(reg, reg, mask);
}

static inline void rx_btstr(TCGv reg, TCGv mask)
{
    TCGv t0;
    t0 = tcg_temp_new();
    tcg_gen_and_i32(t0, reg, mask);
    tcg_gen_setcondi_i32(TCG_COND_NE, cpu_psw_c, t0, 0);
    tcg_gen_mov_i32(cpu_psw_z, cpu_psw_c);
}

static inline void rx_bnotr(TCGv reg, TCGv mask)
{
    tcg_gen_xor_i32(reg, reg, mask);
}

#define BITOP(name, op)                                                 \
    static bool cat3(trans_, name, _im)(DisasContext *ctx,              \
                                        cat3(arg_, name, _im) * a)      \
    {                                                                   \
        TCGv mask, mem, addr;                                           \
        mem = tcg_temp_new();                                           \
        mask = tcg_constant_i32(1 << a->imm);                           \
        addr = rx_index_addr(ctx, mem, a->ld, MO_8, a->rs);             \
        cat3(rx_, op, m)(addr, mask);                                   \
        return true;                                                    \
    }                                                                   \
    static bool cat3(trans_, name, _ir)(DisasContext *ctx,              \
                                        cat3(arg_, name, _ir) * a)      \
    {                                                                   \
        TCGv mask;                                                      \
        mask = tcg_constant_i32(1 << a->imm);                           \
        cat3(rx_, op, r)(cpu_regs[a->rd], mask);                        \
        return true;                                                    \
    }                                                                   \
    static bool cat3(trans_, name, _rr)(DisasContext *ctx,              \
                                        cat3(arg_, name, _rr) * a)      \
    {                                                                   \
        TCGv mask, b;                                                   \
        mask = tcg_temp_new();                                          \
        b = tcg_temp_new();                                             \
        tcg_gen_andi_i32(b, cpu_regs[a->rs], 31);                       \
        tcg_gen_shl_i32(mask, tcg_constant_i32(1), b);                  \
        cat3(rx_, op, r)(cpu_regs[a->rd], mask);                        \
        return true;                                                    \
    }                                                                   \
    static bool cat3(trans_, name, _rm)(DisasContext *ctx,              \
                                        cat3(arg_, name, _rm) * a)      \
    {                                                                   \
        TCGv mask, mem, addr, b;                                        \
        mask = tcg_temp_new();                                          \
        b = tcg_temp_new();                                             \
        tcg_gen_andi_i32(b, cpu_regs[a->rd], 7);                        \
        tcg_gen_shl_i32(mask, tcg_constant_i32(1), b);                  \
        mem = tcg_temp_new();                                           \
        addr = rx_index_addr(ctx, mem, a->ld, MO_8, a->rs);             \
        cat3(rx_, op, m)(addr, mask);                                   \
        return true;                                                    \
    }

BITOP(BSET, bset)
BITOP(BCLR, bclr)
BITOP(BTST, btst)
BITOP(BNOT, bnot)

static inline void bmcnd_op(TCGv val, TCGCond cond, int pos)
{
    TCGv bit;
    DisasCompare dc;
    dc.temp = tcg_temp_new();
    bit = tcg_temp_new();
    psw_cond(&dc, cond);
    tcg_gen_andi_i32(val, val, ~(1 << pos));
    tcg_gen_setcondi_i32(dc.cond, bit, dc.value, 0);
    tcg_gen_deposit_i32(val, val, bit, pos, 1);
 }

/* bmcnd #imm, dsp[rd] */
static bool trans_BMCnd_im(DisasContext *ctx, arg_BMCnd_im *a)
{
    TCGv val, mem, addr;
    val = tcg_temp_new();
    mem = tcg_temp_new();
    addr = rx_index_addr(ctx, mem, a->ld, MO_8, a->rd);
    rx_gen_ld(MO_8, val, addr);
    bmcnd_op(val, a->cd, a->imm);
    rx_gen_st(MO_8, val, addr);
    return true;
}

/* bmcond #imm, rd */
static bool trans_BMCnd_ir(DisasContext *ctx, arg_BMCnd_ir *a)
{
    bmcnd_op(cpu_regs[a->rd], a->cd, a->imm);
    return true;
}

enum {
    PSW_C = 0,
    PSW_Z = 1,
    PSW_S = 2,
    PSW_O = 3,
    PSW_I = 8,
    PSW_U = 9,
};

static inline void clrsetpsw(DisasContext *ctx, int cb, int val)
{
    if (cb < 8) {
        switch (cb) {
        case PSW_C:
            tcg_gen_movi_i32(cpu_psw_c, val);
            break;
        case PSW_Z:
            tcg_gen_movi_i32(cpu_psw_z, val == 0);
            break;
        case PSW_S:
            tcg_gen_movi_i32(cpu_psw_s, val ? -1 : 0);
            break;
        case PSW_O:
            tcg_gen_movi_i32(cpu_psw_o, val << 31);
            break;
        default:
            qemu_log_mask(LOG_GUEST_ERROR, "Invalid destination %d", cb);
            break;
        }
    } else if (is_privileged(ctx, 0)) {
        switch (cb) {
        case PSW_I:
            tcg_gen_movi_i32(cpu_psw_i, val);
            ctx->base.is_jmp = DISAS_UPDATE;
            break;
        case PSW_U:
            if (FIELD_EX32(ctx->tb_flags, PSW, U) != val) {
                ctx->tb_flags = FIELD_DP32(ctx->tb_flags, PSW, U, val);
                tcg_gen_movi_i32(cpu_psw_u, val);
                tcg_gen_mov_i32(val ? cpu_isp : cpu_usp, cpu_sp);
                tcg_gen_mov_i32(cpu_sp, val ? cpu_usp : cpu_isp);
            }
            break;
        default:
            qemu_log_mask(LOG_GUEST_ERROR, "Invalid destination %d", cb);
            break;
        }
    }
}

/* clrpsw psw */
static bool trans_CLRPSW(DisasContext *ctx, arg_CLRPSW *a)
{
    clrsetpsw(ctx, a->cb, 0);
    return true;
}

/* setpsw psw */
static bool trans_SETPSW(DisasContext *ctx, arg_SETPSW *a)
{
    clrsetpsw(ctx, a->cb, 1);
    return true;
}

/* mvtipl #imm */
static bool trans_MVTIPL(DisasContext *ctx, arg_MVTIPL *a)
{
    if (is_privileged(ctx, 1)) {
        tcg_gen_movi_i32(cpu_psw_ipl, a->imm);
        ctx->base.is_jmp = DISAS_UPDATE;
    }
    return true;
}

/* mvtc #imm, rd */
static bool trans_MVTC_i(DisasContext *ctx, arg_MVTC_i *a)
{
    TCGv imm;

    imm = tcg_constant_i32(a->imm);
    move_to_cr(ctx, imm, a->cr);
    return true;
}

/* mvtc rs, rd */
static bool trans_MVTC_r(DisasContext *ctx, arg_MVTC_r *a)
{
    move_to_cr(ctx, cpu_regs[a->rs], a->cr);
    return true;
}

/* mvfc rs, rd */
static bool trans_MVFC(DisasContext *ctx, arg_MVFC *a)
{
    move_from_cr(ctx, cpu_regs[a->rd], a->cr, ctx->pc);
    return true;
}

/* rtfi */
static bool trans_RTFI(DisasContext *ctx, arg_RTFI *a)
{
    TCGv psw;
    if (is_privileged(ctx, 1)) {
        psw = tcg_temp_new();
        tcg_gen_mov_i32(cpu_pc, cpu_bpc);
        tcg_gen_mov_i32(psw, cpu_bpsw);
        gen_helper_set_psw_rte(tcg_env, psw);
        ctx->base.is_jmp = DISAS_EXIT;
    }
    return true;
}

/* rte */
static bool trans_RTE(DisasContext *ctx, arg_RTE *a)
{
    TCGv psw;
    if (is_privileged(ctx, 1)) {
        psw = tcg_temp_new();
        pop(cpu_pc);
        pop(psw);
        gen_helper_set_psw_rte(tcg_env, psw);
        ctx->base.is_jmp = DISAS_EXIT;
    }
    return true;
}

/* brk */
static bool trans_BRK(DisasContext *ctx, arg_BRK *a)
{
    tcg_gen_movi_i32(cpu_pc, ctx->base.pc_next);
    gen_helper_rxbrk(tcg_env);
    ctx->base.is_jmp = DISAS_NORETURN;
    return true;
}

/* int #imm */
static bool trans_INT(DisasContext *ctx, arg_INT *a)
{
    TCGv vec;

    tcg_debug_assert(a->imm < 0x100);
    vec = tcg_constant_i32(a->imm);
    tcg_gen_movi_i32(cpu_pc, ctx->base.pc_next);
    gen_helper_rxint(tcg_env, vec);
    ctx->base.is_jmp = DISAS_NORETURN;
    return true;
}

/* wait */
static bool trans_WAIT(DisasContext *ctx, arg_WAIT *a)
{
    if (is_privileged(ctx, 1)) {
        tcg_gen_movi_i32(cpu_pc, ctx->base.pc_next);
        gen_helper_wait(tcg_env);
    }
    return true;
}

static void rx_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);
    ctx->env = cpu_env(cs);
    ctx->tb_flags = ctx->base.tb->flags;
}

static void rx_tr_tb_start(DisasContextBase *dcbase, CPUState *cs)
{
}

static void rx_tr_insn_start(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);

    tcg_gen_insn_start(ctx->base.pc_next);
}

static void rx_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);
    uint32_t insn;

    ctx->pc = ctx->base.pc_next;
    insn = decode_load(ctx);
    if (!decode(ctx, insn)) {
        gen_helper_raise_illegal_instruction(tcg_env);
    }
}

static void rx_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
{
    DisasContext *ctx = container_of(dcbase, DisasContext, base);

    switch (ctx->base.is_jmp) {
    case DISAS_NEXT:
    case DISAS_TOO_MANY:
        gen_goto_tb(ctx, 0, dcbase->pc_next);
        break;
    case DISAS_JUMP:
        tcg_gen_lookup_and_goto_ptr();
        break;
    case DISAS_UPDATE:
        tcg_gen_movi_i32(cpu_pc, ctx->base.pc_next);
        /* fall through */
    case DISAS_EXIT:
        tcg_gen_exit_tb(NULL, 0);
        break;
    case DISAS_NORETURN:
        break;
    default:
        g_assert_not_reached();
    }
}

static const TranslatorOps rx_tr_ops = {
    .init_disas_context = rx_tr_init_disas_context,
    .tb_start           = rx_tr_tb_start,
    .insn_start         = rx_tr_insn_start,
    .translate_insn     = rx_tr_translate_insn,
    .tb_stop            = rx_tr_tb_stop,
};

void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int *max_insns,
                           vaddr pc, void *host_pc)
{
    DisasContext dc;

    translator_loop(cs, tb, max_insns, pc, host_pc, &rx_tr_ops, &dc.base);
}

#define ALLOC_REGISTER(sym, name) \
    cpu_##sym = tcg_global_mem_new_i32(tcg_env, \
                                       offsetof(CPURXState, sym), name)

void rx_translate_init(void)
{
    static const char * const regnames[NUM_REGS] = {
        "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7",
        "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"
    };
    int i;

    for (i = 0; i < NUM_REGS; i++) {
        cpu_regs[i] = tcg_global_mem_new_i32(tcg_env,
                                              offsetof(CPURXState, regs[i]),
                                              regnames[i]);
    }
    ALLOC_REGISTER(pc, "PC");
    ALLOC_REGISTER(psw_o, "PSW(O)");
    ALLOC_REGISTER(psw_s, "PSW(S)");
    ALLOC_REGISTER(psw_z, "PSW(Z)");
    ALLOC_REGISTER(psw_c, "PSW(C)");
    ALLOC_REGISTER(psw_u, "PSW(U)");
    ALLOC_REGISTER(psw_i, "PSW(I)");
    ALLOC_REGISTER(psw_pm, "PSW(PM)");
    ALLOC_REGISTER(psw_ipl, "PSW(IPL)");
    ALLOC_REGISTER(usp, "USP");
    ALLOC_REGISTER(fpsw, "FPSW");
    ALLOC_REGISTER(bpsw, "BPSW");
    ALLOC_REGISTER(bpc, "BPC");
    ALLOC_REGISTER(isp, "ISP");
    ALLOC_REGISTER(fintv, "FINTV");
    ALLOC_REGISTER(intb, "INTB");
    cpu_acc = tcg_global_mem_new_i64(tcg_env,
                                     offsetof(CPURXState, acc), "ACC");
}