path: root/tcg/tci.c

/*
 * Tiny Code Interpreter for QEMU
 *
 * Copyright (c) 2009, 2011, 2016 Stefan Weil
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu/osdep.h"

/* Enable TCI assertions only when debugging TCG (and without NDEBUG defined).
 * Without assertions, the interpreter runs much faster. */
#if defined(CONFIG_DEBUG_TCG)
# define tci_assert(cond) assert(cond)
#else
# define tci_assert(cond) ((void)(cond))
#endif

#include "qemu-common.h"
#include "tcg/tcg.h"           /* MAX_OPC_PARAM_IARGS */
#include "exec/cpu_ldst.h"
#include "tcg/tcg-op.h"
#include "qemu/compiler.h"

#if MAX_OPC_PARAM_IARGS != 6
# error Fix needed, number of supported input arguments changed!
#endif
#if TCG_TARGET_REG_BITS == 32
typedef uint64_t (*helper_function)(tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong);
#else
typedef uint64_t (*helper_function)(tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong,
                                    tcg_target_ulong, tcg_target_ulong);
#endif

__thread uintptr_t tci_tb_ptr;

static tcg_target_ulong tci_read_reg(const tcg_target_ulong *regs, TCGReg index)
{
    tci_assert(index < TCG_TARGET_NB_REGS);
    return regs[index];
}

static void
tci_write_reg(tcg_target_ulong *regs, TCGReg index, tcg_target_ulong value)
{
    tci_assert(index < TCG_TARGET_NB_REGS);
    tci_assert(index != TCG_AREG0);
    tci_assert(index != TCG_REG_CALL_STACK);
    regs[index] = value;
}

static void tci_write_reg64(tcg_target_ulong *regs, uint32_t high_index,
                            uint32_t low_index, uint64_t value)
{
    tci_write_reg(regs, low_index, value);
    tci_write_reg(regs, high_index, value >> 32);
}

/* Create a 64 bit value from two 32 bit values. */
static uint64_t tci_uint64(uint32_t high, uint32_t low)
{
    return ((uint64_t)high << 32) + low;
}

/* Read constant byte from bytecode. */
static uint8_t tci_read_b(const uint8_t **tb_ptr)
{
    return *(tb_ptr[0]++);
}

/* Read register number from bytecode. */
static TCGReg tci_read_r(const uint8_t **tb_ptr)
{
    uint8_t regno = tci_read_b(tb_ptr);
    tci_assert(regno < TCG_TARGET_NB_REGS);
    return regno;
}

/* Read constant (native size) from bytecode. */
static tcg_target_ulong tci_read_i(const uint8_t **tb_ptr)
{
    tcg_target_ulong value = *(const tcg_target_ulong *)(*tb_ptr);
    *tb_ptr += sizeof(value);
    return value;
}

/* Read unsigned constant (32 bit) from bytecode. */
static uint32_t tci_read_i32(const uint8_t **tb_ptr)
{
    uint32_t value = *(const uint32_t *)(*tb_ptr);
    *tb_ptr += sizeof(value);
    return value;
}

/* Read signed constant (32 bit) from bytecode. */
static int32_t tci_read_s32(const uint8_t **tb_ptr)
{
    int32_t value = *(const int32_t *)(*tb_ptr);
    *tb_ptr += sizeof(value);
    return value;
}

static tcg_target_ulong tci_read_label(const uint8_t **tb_ptr)
{
    return tci_read_i(tb_ptr);
}

/*
 * Load sets of arguments all at once.  The naming convention is:
 *   tci_args_<arguments>
 * where arguments is a sequence of
 *
 *   b = immediate (bit position)
 *   c = condition (TCGCond)
 *   i = immediate (uint32_t)
 *   I = immediate (tcg_target_ulong)
 *   l = label or pointer
 *   m = immediate (TCGMemOpIdx)
 *   r = register
 *   s = signed ldst offset
 */

static void check_size(const uint8_t *start, const uint8_t **tb_ptr)
{
    const uint8_t *old_code_ptr = start - 2;
    uint8_t op_size = old_code_ptr[1];
    tci_assert(*tb_ptr == old_code_ptr + op_size);
}

static void tci_args_l(const uint8_t **tb_ptr, void **l0)
{
    const uint8_t *start = *tb_ptr;

    *l0 = (void *)tci_read_label(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rr(const uint8_t **tb_ptr,
                        TCGReg *r0, TCGReg *r1)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_ri(const uint8_t **tb_ptr,
                        TCGReg *r0, tcg_target_ulong *i1)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *i1 = tci_read_i32(tb_ptr);

    check_size(start, tb_ptr);
}

#if TCG_TARGET_REG_BITS == 64
static void tci_args_rI(const uint8_t **tb_ptr,
                        TCGReg *r0, tcg_target_ulong *i1)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *i1 = tci_read_i(tb_ptr);

    check_size(start, tb_ptr);
}
#endif

static void tci_args_rrm(const uint8_t **tb_ptr,
                         TCGReg *r0, TCGReg *r1, TCGMemOpIdx *m2)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *m2 = tci_read_i32(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrr(const uint8_t **tb_ptr,
                         TCGReg *r0, TCGReg *r1, TCGReg *r2)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrs(const uint8_t **tb_ptr,
                         TCGReg *r0, TCGReg *r1, int32_t *i2)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *i2 = tci_read_s32(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrcl(const uint8_t **tb_ptr,
                          TCGReg *r0, TCGReg *r1, TCGCond *c2, void **l3)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *c2 = tci_read_b(tb_ptr);
    *l3 = (void *)tci_read_label(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrc(const uint8_t **tb_ptr,
                          TCGReg *r0, TCGReg *r1, TCGReg *r2, TCGCond *c3)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *c3 = tci_read_b(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrm(const uint8_t **tb_ptr,
                          TCGReg *r0, TCGReg *r1, TCGReg *r2, TCGMemOpIdx *m3)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *m3 = tci_read_i32(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrbb(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
                           TCGReg *r2, uint8_t *i3, uint8_t *i4)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *i3 = tci_read_b(tb_ptr);
    *i4 = tci_read_b(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrrm(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
                           TCGReg *r2, TCGReg *r3, TCGMemOpIdx *m4)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *r3 = tci_read_r(tb_ptr);
    *m4 = tci_read_i32(tb_ptr);

    check_size(start, tb_ptr);
}

#if TCG_TARGET_REG_BITS == 32
static void tci_args_rrrr(const uint8_t **tb_ptr,
                          TCGReg *r0, TCGReg *r1, TCGReg *r2, TCGReg *r3)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *r3 = tci_read_r(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrrcl(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
                            TCGReg *r2, TCGReg *r3, TCGCond *c4, void **l5)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *r3 = tci_read_r(tb_ptr);
    *c4 = tci_read_b(tb_ptr);
    *l5 = (void *)tci_read_label(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrrrc(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
                            TCGReg *r2, TCGReg *r3, TCGReg *r4, TCGCond *c5)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *r3 = tci_read_r(tb_ptr);
    *r4 = tci_read_r(tb_ptr);
    *c5 = tci_read_b(tb_ptr);

    check_size(start, tb_ptr);
}

static void tci_args_rrrrrr(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
                            TCGReg *r2, TCGReg *r3, TCGReg *r4, TCGReg *r5)
{
    const uint8_t *start = *tb_ptr;

    *r0 = tci_read_r(tb_ptr);
    *r1 = tci_read_r(tb_ptr);
    *r2 = tci_read_r(tb_ptr);
    *r3 = tci_read_r(tb_ptr);
    *r4 = tci_read_r(tb_ptr);
    *r5 = tci_read_r(tb_ptr);

    check_size(start, tb_ptr);
}
#endif

static bool tci_compare32(uint32_t u0, uint32_t u1, TCGCond condition)
{
    bool result = false;
    int32_t i0 = u0;
    int32_t i1 = u1;
    switch (condition) {
    case TCG_COND_EQ:
        result = (u0 == u1);
        break;
    case TCG_COND_NE:
        result = (u0 != u1);
        break;
    case TCG_COND_LT:
        result = (i0 < i1);
        break;
    case TCG_COND_GE:
        result = (i0 >= i1);
        break;
    case TCG_COND_LE:
        result = (i0 <= i1);
        break;
    case TCG_COND_GT:
        result = (i0 > i1);
        break;
    case TCG_COND_LTU:
        result = (u0 < u1);
        break;
    case TCG_COND_GEU:
        result = (u0 >= u1);
        break;
    case TCG_COND_LEU:
        result = (u0 <= u1);
        break;
    case TCG_COND_GTU:
        result = (u0 > u1);
        break;
    default:
        g_assert_not_reached();
    }
    return result;
}

static bool tci_compare64(uint64_t u0, uint64_t u1, TCGCond condition)
{
    bool result = false;
    int64_t i0 = u0;
    int64_t i1 = u1;
    switch (condition) {
    case TCG_COND_EQ:
        result = (u0 == u1);
        break;
    case TCG_COND_NE:
        result = (u0 != u1);
        break;
    case TCG_COND_LT:
        result = (i0 < i1);
        break;
    case TCG_COND_GE:
        result = (i0 >= i1);
        break;
    case TCG_COND_LE:
        result = (i0 <= i1);
        break;
    case TCG_COND_GT:
        result = (i0 > i1);
        break;
    case TCG_COND_LTU:
        result = (u0 < u1);
        break;
    case TCG_COND_GEU:
        result = (u0 >= u1);
        break;
    case TCG_COND_LEU:
        result = (u0 <= u1);
        break;
    case TCG_COND_GTU:
        result = (u0 > u1);
        break;
    default:
        g_assert_not_reached();
    }
    return result;
}

#define qemu_ld_ub \
    cpu_ldub_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_ld_leuw \
    cpu_lduw_le_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_ld_leul \
    cpu_ldl_le_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_ld_leq \
    cpu_ldq_le_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_ld_beuw \
    cpu_lduw_be_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_ld_beul \
    cpu_ldl_be_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_ld_beq \
    cpu_ldq_be_mmuidx_ra(env, taddr, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_b(X) \
    cpu_stb_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_lew(X) \
    cpu_stw_le_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_lel(X) \
    cpu_stl_le_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_leq(X) \
    cpu_stq_le_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_bew(X) \
    cpu_stw_be_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_bel(X) \
    cpu_stl_be_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)
#define qemu_st_beq(X) \
    cpu_stq_be_mmuidx_ra(env, taddr, X, get_mmuidx(oi), (uintptr_t)tb_ptr)

#if TCG_TARGET_REG_BITS == 64
# define CASE_32_64(x) \
        case glue(glue(INDEX_op_, x), _i64): \
        case glue(glue(INDEX_op_, x), _i32):
# define CASE_64(x) \
        case glue(glue(INDEX_op_, x), _i64):
#else
# define CASE_32_64(x) \
        case glue(glue(INDEX_op_, x), _i32):
# define CASE_64(x)
#endif

/* Interpret pseudo code in tb. */
/*
 * Disable CFI checks.
 * One possible operation in the pseudo code is a call to binary code.
 * Therefore, disable CFI checks in the interpreter function
 */
uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
                                            const void *v_tb_ptr)
{
    const uint8_t *tb_ptr = v_tb_ptr;
    tcg_target_ulong regs[TCG_TARGET_NB_REGS];
    long tcg_temps[CPU_TEMP_BUF_NLONGS];
    uintptr_t sp_value = (uintptr_t)(tcg_temps + CPU_TEMP_BUF_NLONGS);

    regs[TCG_AREG0] = (tcg_target_ulong)env;
    regs[TCG_REG_CALL_STACK] = sp_value;
    tci_assert(tb_ptr);

    for (;;) {
        TCGOpcode opc = tb_ptr[0];
        TCGReg r0, r1, r2, r3;
        tcg_target_ulong t1;
        TCGCond condition;
        target_ulong taddr;
        uint8_t pos, len;
        uint32_t tmp32;
        uint64_t tmp64;
#if TCG_TARGET_REG_BITS == 32
        TCGReg r4, r5;
        uint64_t T1, T2;
#endif
        TCGMemOpIdx oi;
        int32_t ofs;
        void *ptr;

        /* Skip opcode and size entry. */
        tb_ptr += 2;

        switch (opc) {
        case INDEX_op_call:
            tci_args_l(&tb_ptr, &ptr);
            tci_tb_ptr = (uintptr_t)tb_ptr;
#if TCG_TARGET_REG_BITS == 32
            tmp64 = ((helper_function)ptr)(tci_read_reg(regs, TCG_REG_R0),
                                           tci_read_reg(regs, TCG_REG_R1),
                                           tci_read_reg(regs, TCG_REG_R2),
                                           tci_read_reg(regs, TCG_REG_R3),
                                           tci_read_reg(regs, TCG_REG_R4),
                                           tci_read_reg(regs, TCG_REG_R5),
                                           tci_read_reg(regs, TCG_REG_R6),
                                           tci_read_reg(regs, TCG_REG_R7),
                                           tci_read_reg(regs, TCG_REG_R8),
                                           tci_read_reg(regs, TCG_REG_R9),
                                           tci_read_reg(regs, TCG_REG_R10),
                                           tci_read_reg(regs, TCG_REG_R11));
            tci_write_reg(regs, TCG_REG_R0, tmp64);
            tci_write_reg(regs, TCG_REG_R1, tmp64 >> 32);
#else
            tmp64 = ((helper_function)ptr)(tci_read_reg(regs, TCG_REG_R0),
                                           tci_read_reg(regs, TCG_REG_R1),
                                           tci_read_reg(regs, TCG_REG_R2),
                                           tci_read_reg(regs, TCG_REG_R3),
                                           tci_read_reg(regs, TCG_REG_R4),
                                           tci_read_reg(regs, TCG_REG_R5));
            tci_write_reg(regs, TCG_REG_R0, tmp64);
#endif
            break;
        case INDEX_op_br:
            tci_args_l(&tb_ptr, &ptr);
            tb_ptr = ptr;
            continue;
        case INDEX_op_setcond_i32:
            tci_args_rrrc(&tb_ptr, &r0, &r1, &r2, &condition);
            regs[r0] = tci_compare32(regs[r1], regs[r2], condition);
            break;
#if TCG_TARGET_REG_BITS == 32
        case INDEX_op_setcond2_i32:
            tci_args_rrrrrc(&tb_ptr, &r0, &r1, &r2, &r3, &r4, &condition);
            T1 = tci_uint64(regs[r2], regs[r1]);
            T2 = tci_uint64(regs[r4], regs[r3]);
            regs[r0] = tci_compare64(T1, T2, condition);
            break;
#elif TCG_TARGET_REG_BITS == 64
        case INDEX_op_setcond_i64:
            tci_args_rrrc(&tb_ptr, &r0, &r1, &r2, &condition);
            regs[r0] = tci_compare64(regs[r1], regs[r2], condition);
            break;
#endif
        CASE_32_64(mov)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = regs[r1];
            break;
        case INDEX_op_tci_movi_i32:
            tci_args_ri(&tb_ptr, &r0, &t1);
            regs[r0] = t1;
            break;

            /* Load/store operations (32 bit). */

        CASE_32_64(ld8u)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(uint8_t *)ptr;
            break;
        CASE_32_64(ld8s)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(int8_t *)ptr;
            break;
        CASE_32_64(ld16u)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(uint16_t *)ptr;
            break;
        CASE_32_64(ld16s)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(int16_t *)ptr;
            break;
        case INDEX_op_ld_i32:
        CASE_64(ld32u)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(uint32_t *)ptr;
            break;
        CASE_32_64(st8)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            *(uint8_t *)ptr = regs[r0];
            break;
        CASE_32_64(st16)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            *(uint16_t *)ptr = regs[r0];
            break;
        case INDEX_op_st_i32:
        CASE_64(st32)
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            *(uint32_t *)ptr = regs[r0];
            break;

            /* Arithmetic operations (mixed 32/64 bit). */

        CASE_32_64(add)
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] + regs[r2];
            break;
        CASE_32_64(sub)
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] - regs[r2];
            break;
        CASE_32_64(mul)
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] * regs[r2];
            break;
        CASE_32_64(and)
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] & regs[r2];
            break;
        CASE_32_64(or)
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] | regs[r2];
            break;
        CASE_32_64(xor)
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] ^ regs[r2];
            break;

            /* Arithmetic operations (32 bit). */

        case INDEX_op_div_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (int32_t)regs[r1] / (int32_t)regs[r2];
            break;
        case INDEX_op_divu_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (uint32_t)regs[r1] / (uint32_t)regs[r2];
            break;
        case INDEX_op_rem_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (int32_t)regs[r1] % (int32_t)regs[r2];
            break;
        case INDEX_op_remu_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (uint32_t)regs[r1] % (uint32_t)regs[r2];
            break;

            /* Shift/rotate operations (32 bit). */

        case INDEX_op_shl_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (uint32_t)regs[r1] << (regs[r2] & 31);
            break;
        case INDEX_op_shr_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (uint32_t)regs[r1] >> (regs[r2] & 31);
            break;
        case INDEX_op_sar_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (int32_t)regs[r1] >> (regs[r2] & 31);
            break;
#if TCG_TARGET_HAS_rot_i32
        case INDEX_op_rotl_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = rol32(regs[r1], regs[r2] & 31);
            break;
        case INDEX_op_rotr_i32:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = ror32(regs[r1], regs[r2] & 31);
            break;
#endif
#if TCG_TARGET_HAS_deposit_i32
        case INDEX_op_deposit_i32:
            tci_args_rrrbb(&tb_ptr, &r0, &r1, &r2, &pos, &len);
            regs[r0] = deposit32(regs[r1], pos, len, regs[r2]);
            break;
#endif
        case INDEX_op_brcond_i32:
            tci_args_rrcl(&tb_ptr, &r0, &r1, &condition, &ptr);
            if (tci_compare32(regs[r0], regs[r1], condition)) {
                tb_ptr = ptr;
            }
            break;
#if TCG_TARGET_REG_BITS == 32
        case INDEX_op_add2_i32:
            tci_args_rrrrrr(&tb_ptr, &r0, &r1, &r2, &r3, &r4, &r5);
            T1 = tci_uint64(regs[r3], regs[r2]);
            T2 = tci_uint64(regs[r5], regs[r4]);
            tci_write_reg64(regs, r1, r0, T1 + T2);
            break;
        case INDEX_op_sub2_i32:
            tci_args_rrrrrr(&tb_ptr, &r0, &r1, &r2, &r3, &r4, &r5);
            T1 = tci_uint64(regs[r3], regs[r2]);
            T2 = tci_uint64(regs[r5], regs[r4]);
            tci_write_reg64(regs, r1, r0, T1 - T2);
            break;
        case INDEX_op_brcond2_i32:
            tci_args_rrrrcl(&tb_ptr, &r0, &r1, &r2, &r3, &condition, &ptr);
            T1 = tci_uint64(regs[r1], regs[r0]);
            T2 = tci_uint64(regs[r3], regs[r2]);
            if (tci_compare64(T1, T2, condition)) {
                tb_ptr = ptr;
                continue;
            }
            break;
        case INDEX_op_mulu2_i32:
            tci_args_rrrr(&tb_ptr, &r0, &r1, &r2, &r3);
            tci_write_reg64(regs, r1, r0, (uint64_t)regs[r2] * regs[r3]);
            break;
#endif /* TCG_TARGET_REG_BITS == 32 */
#if TCG_TARGET_HAS_ext8s_i32 || TCG_TARGET_HAS_ext8s_i64
        CASE_32_64(ext8s)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = (int8_t)regs[r1];
            break;
#endif
#if TCG_TARGET_HAS_ext16s_i32 || TCG_TARGET_HAS_ext16s_i64
        CASE_32_64(ext16s)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = (int16_t)regs[r1];
            break;
#endif
#if TCG_TARGET_HAS_ext8u_i32 || TCG_TARGET_HAS_ext8u_i64
        CASE_32_64(ext8u)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = (uint8_t)regs[r1];
            break;
#endif
#if TCG_TARGET_HAS_ext16u_i32 || TCG_TARGET_HAS_ext16u_i64
        CASE_32_64(ext16u)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = (uint16_t)regs[r1];
            break;
#endif
#if TCG_TARGET_HAS_bswap16_i32 || TCG_TARGET_HAS_bswap16_i64
        CASE_32_64(bswap16)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = bswap16(regs[r1]);
            break;
#endif
#if TCG_TARGET_HAS_bswap32_i32 || TCG_TARGET_HAS_bswap32_i64
        CASE_32_64(bswap32)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = bswap32(regs[r1]);
            break;
#endif
#if TCG_TARGET_HAS_not_i32 || TCG_TARGET_HAS_not_i64
        CASE_32_64(not)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = ~regs[r1];
            break;
#endif
#if TCG_TARGET_HAS_neg_i32 || TCG_TARGET_HAS_neg_i64
        CASE_32_64(neg)
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = -regs[r1];
            break;
#endif
#if TCG_TARGET_REG_BITS == 64
        case INDEX_op_tci_movi_i64:
            tci_args_rI(&tb_ptr, &r0, &t1);
            regs[r0] = t1;
            break;

            /* Load/store operations (64 bit). */

        case INDEX_op_ld32s_i64:
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(int32_t *)ptr;
            break;
        case INDEX_op_ld_i64:
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            regs[r0] = *(uint64_t *)ptr;
            break;
        case INDEX_op_st_i64:
            tci_args_rrs(&tb_ptr, &r0, &r1, &ofs);
            ptr = (void *)(regs[r1] + ofs);
            *(uint64_t *)ptr = regs[r0];
            break;

            /* Arithmetic operations (64 bit). */

        case INDEX_op_div_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (int64_t)regs[r1] / (int64_t)regs[r2];
            break;
        case INDEX_op_divu_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (uint64_t)regs[r1] / (uint64_t)regs[r2];
            break;
        case INDEX_op_rem_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (int64_t)regs[r1] % (int64_t)regs[r2];
            break;
        case INDEX_op_remu_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (uint64_t)regs[r1] % (uint64_t)regs[r2];
            break;

            /* Shift/rotate operations (64 bit). */

        case INDEX_op_shl_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] << (regs[r2] & 63);
            break;
        case INDEX_op_shr_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = regs[r1] >> (regs[r2] & 63);
            break;
        case INDEX_op_sar_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = (int64_t)regs[r1] >> (regs[r2] & 63);
            break;
#if TCG_TARGET_HAS_rot_i64
        case INDEX_op_rotl_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = rol64(regs[r1], regs[r2] & 63);
            break;
        case INDEX_op_rotr_i64:
            tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
            regs[r0] = ror64(regs[r1], regs[r2] & 63);
            break;
#endif
#if TCG_TARGET_HAS_deposit_i64
        case INDEX_op_deposit_i64:
            tci_args_rrrbb(&tb_ptr, &r0, &r1, &r2, &pos, &len);
            regs[r0] = deposit64(regs[r1], pos, len, regs[r2]);
            break;
#endif
        case INDEX_op_brcond_i64:
            tci_args_rrcl(&tb_ptr, &r0, &r1, &condition, &ptr);
            if (tci_compare64(regs[r0], regs[r1], condition)) {
                tb_ptr = ptr;
            }
            break;
        case INDEX_op_ext32s_i64:
        case INDEX_op_ext_i32_i64:
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = (int32_t)regs[r1];
            break;
        case INDEX_op_ext32u_i64:
        case INDEX_op_extu_i32_i64:
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = (uint32_t)regs[r1];
            break;
#if TCG_TARGET_HAS_bswap64_i64
        case INDEX_op_bswap64_i64:
            tci_args_rr(&tb_ptr, &r0, &r1);
            regs[r0] = bswap64(regs[r1]);
            break;
#endif
#endif /* TCG_TARGET_REG_BITS == 64 */

            /* QEMU specific operations. */

        case INDEX_op_exit_tb:
            tci_args_l(&tb_ptr, &ptr);
            return (uintptr_t)ptr;

        case INDEX_op_goto_tb:
            tci_args_l(&tb_ptr, &ptr);
            tb_ptr = *(void **)ptr;
            break;

        case INDEX_op_qemu_ld_i32:
            if (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS) {
                tci_args_rrm(&tb_ptr, &r0, &r1, &oi);
                taddr = regs[r1];
            } else {
                tci_args_rrrm(&tb_ptr, &r0, &r1, &r2, &oi);
                taddr = tci_uint64(regs[r2], regs[r1]);
            }
            switch (get_memop(oi) & (MO_BSWAP | MO_SSIZE)) {
            case MO_UB:
                tmp32 = qemu_ld_ub;
                break;
            case MO_SB:
                tmp32 = (int8_t)qemu_ld_ub;
                break;
            case MO_LEUW:
                tmp32 = qemu_ld_leuw;
                break;
            case MO_LESW:
                tmp32 = (int16_t)qemu_ld_leuw;
                break;
            case MO_LEUL:
                tmp32 = qemu_ld_leul;
                break;
            case MO_BEUW:
                tmp32 = qemu_ld_beuw;
                break;
            case MO_BESW:
                tmp32 = (int16_t)qemu_ld_beuw;
                break;
            case MO_BEUL:
                tmp32 = qemu_ld_beul;
                break;
            default:
                g_assert_not_reached();
            }
            regs[r0] = tmp32;
            break;

        case INDEX_op_qemu_ld_i64:
            if (TCG_TARGET_REG_BITS == 64) {
                tci_args_rrm(&tb_ptr, &r0, &r1, &oi);
                taddr = regs[r1];
            } else if (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS) {
                tci_args_rrrm(&tb_ptr, &r0, &r1, &r2, &oi);
                taddr = regs[r2];
            } else {
                tci_args_rrrrm(&tb_ptr, &r0, &r1, &r2, &r3, &oi);
                taddr = tci_uint64(regs[r3], regs[r2]);
            }
            switch (get_memop(oi) & (MO_BSWAP | MO_SSIZE)) {
            case MO_UB:
                tmp64 = qemu_ld_ub;
                break;
            case MO_SB:
                tmp64 = (int8_t)qemu_ld_ub;
                break;
            case MO_LEUW:
                tmp64 = qemu_ld_leuw;
                break;
            case MO_LESW:
                tmp64 = (int16_t)qemu_ld_leuw;
                break;
            case MO_LEUL:
                tmp64 = qemu_ld_leul;
                break;
            case MO_LESL:
                tmp64 = (int32_t)qemu_ld_leul;
                break;
            case MO_LEQ:
                tmp64 = qemu_ld_leq;
                break;
            case MO_BEUW:
                tmp64 = qemu_ld_beuw;
                break;
            case MO_BESW:
                tmp64 = (int16_t)qemu_ld_beuw;
                break;
            case MO_BEUL:
                tmp64 = qemu_ld_beul;
                break;
            case MO_BESL:
                tmp64 = (int32_t)qemu_ld_beul;
                break;
            case MO_BEQ:
                tmp64 = qemu_ld_beq;
                break;
            default:
                g_assert_not_reached();
            }
            if (TCG_TARGET_REG_BITS == 32) {
                tci_write_reg64(regs, r1, r0, tmp64);
            } else {
                regs[r0] = tmp64;
            }
            break;

        case INDEX_op_qemu_st_i32:
            if (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS) {
                tci_args_rrm(&tb_ptr, &r0, &r1, &oi);
                taddr = regs[r1];
            } else {
                tci_args_rrrm(&tb_ptr, &r0, &r1, &r2, &oi);
                taddr = tci_uint64(regs[r2], regs[r1]);
            }
            tmp32 = regs[r0];
            switch (get_memop(oi) & (MO_BSWAP | MO_SIZE)) {
            case MO_UB:
                qemu_st_b(tmp32);
                break;
            case MO_LEUW:
                qemu_st_lew(tmp32);
                break;
            case MO_LEUL:
                qemu_st_lel(tmp32);
                break;
            case MO_BEUW:
                qemu_st_bew(tmp32);
                break;
            case MO_BEUL:
                qemu_st_bel(tmp32);
                break;
            default:
                g_assert_not_reached();
            }
            break;

        case INDEX_op_qemu_st_i64:
            if (TCG_TARGET_REG_BITS == 64) {
                tci_args_rrm(&tb_ptr, &r0, &r1, &oi);
                taddr = regs[r1];
                tmp64 = regs[r0];
            } else {
                if (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS) {
                    tci_args_rrrm(&tb_ptr, &r0, &r1, &r2, &oi);
                    taddr = regs[r2];
                } else {
                    tci_args_rrrrm(&tb_ptr, &r0, &r1, &r2, &r3, &oi);
                    taddr = tci_uint64(regs[r3], regs[r2]);
                }
                tmp64 = tci_uint64(regs[r1], regs[r0]);
            }
            switch (get_memop(oi) & (MO_BSWAP | MO_SIZE)) {
            case MO_UB:
                qemu_st_b(tmp64);
                break;
            case MO_LEUW:
                qemu_st_lew(tmp64);
                break;
            case MO_LEUL:
                qemu_st_lel(tmp64);
                break;
            case MO_LEQ:
                qemu_st_leq(tmp64);
                break;
            case MO_BEUW:
                qemu_st_bew(tmp64);
                break;
            case MO_BEUL:
                qemu_st_bel(tmp64);
                break;
            case MO_BEQ:
                qemu_st_beq(tmp64);
                break;
            default:
                g_assert_not_reached();
            }
            break;

        case INDEX_op_mb:
            /* Ensure ordering for all kinds */
            smp_mb();
            break;
        default:
            g_assert_not_reached();
        }
    }
}

/*
 * Disassembler that matches the interpreter
 */

static const char *str_r(TCGReg r)
{
    static const char regs[TCG_TARGET_NB_REGS][4] = {
        "r0", "r1", "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
        "r8", "r9", "r10", "r11", "r12", "r13", "env", "sp"
    };

    QEMU_BUILD_BUG_ON(TCG_AREG0 != TCG_REG_R14);
    QEMU_BUILD_BUG_ON(TCG_REG_CALL_STACK != TCG_REG_R15);

    assert((unsigned)r < TCG_TARGET_NB_REGS);
    return regs[r];
}

static const char *str_c(TCGCond c)
{
    static const char cond[16][8] = {
        [TCG_COND_NEVER] = "never",
        [TCG_COND_ALWAYS] = "always",
        [TCG_COND_EQ] = "eq",
        [TCG_COND_NE] = "ne",
        [TCG_COND_LT] = "lt",
        [TCG_COND_GE] = "ge",
        [TCG_COND_LE] = "le",
        [TCG_COND_GT] = "gt",
        [TCG_COND_LTU] = "ltu",
        [TCG_COND_GEU] = "geu",
        [TCG_COND_LEU] = "leu",
        [TCG_COND_GTU] = "gtu",
    };

    assert((unsigned)c < ARRAY_SIZE(cond));
    assert(cond[c][0] != 0);
    return cond[c];
}

/* Disassemble TCI bytecode. */
int print_insn_tci(bfd_vma addr, disassemble_info *info)
{
    uint8_t buf[256];
    int length, status;
    const TCGOpDef *def;
    const char *op_name;
    TCGOpcode op;
    TCGReg r0, r1, r2, r3;
#if TCG_TARGET_REG_BITS == 32
    TCGReg r4, r5;
#endif
    tcg_target_ulong i1;
    int32_t s2;
    TCGCond c;
    TCGMemOpIdx oi;
    uint8_t pos, len;
    void *ptr;
    const uint8_t *tb_ptr;

    status = info->read_memory_func(addr, buf, 2, info);
    if (status != 0) {
        info->memory_error_func(status, addr, info);
        return -1;
    }
    op = buf[0];
    length = buf[1];

    if (length < 2) {
        info->fprintf_func(info->stream, "invalid length %d", length);
        return 1;
    }

    status = info->read_memory_func(addr + 2, buf + 2, length - 2, info);
    if (status != 0) {
        info->memory_error_func(status, addr + 2, info);
        return -1;
    }

    def = &tcg_op_defs[op];
    op_name = def->name;
    tb_ptr = buf + 2;

    switch (op) {
    case INDEX_op_br:
    case INDEX_op_call:
    case INDEX_op_exit_tb:
    case INDEX_op_goto_tb:
        tci_args_l(&tb_ptr, &ptr);
        info->fprintf_func(info->stream, "%-12s  %p", op_name, ptr);
        break;

    case INDEX_op_brcond_i32:
    case INDEX_op_brcond_i64:
        tci_args_rrcl(&tb_ptr, &r0, &r1, &c, &ptr);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %p",
                           op_name, str_r(r0), str_r(r1), str_c(c), ptr);
        break;

    case INDEX_op_setcond_i32:
    case INDEX_op_setcond_i64:
        tci_args_rrrc(&tb_ptr, &r0, &r1, &r2, &c);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %s",
                           op_name, str_r(r0), str_r(r1), str_r(r2), str_c(c));
        break;

    case INDEX_op_tci_movi_i32:
        tci_args_ri(&tb_ptr, &r0, &i1);
        info->fprintf_func(info->stream, "%-12s  %s, 0x%" TCG_PRIlx,
                           op_name, str_r(r0), i1);
        break;

#if TCG_TARGET_REG_BITS == 64
    case INDEX_op_tci_movi_i64:
        tci_args_rI(&tb_ptr, &r0, &i1);
        info->fprintf_func(info->stream, "%-12s  %s, 0x%" TCG_PRIlx,
                           op_name, str_r(r0), i1);
        break;
#endif

    case INDEX_op_ld8u_i32:
    case INDEX_op_ld8u_i64:
    case INDEX_op_ld8s_i32:
    case INDEX_op_ld8s_i64:
    case INDEX_op_ld16u_i32:
    case INDEX_op_ld16u_i64:
    case INDEX_op_ld16s_i32:
    case INDEX_op_ld16s_i64:
    case INDEX_op_ld32u_i64:
    case INDEX_op_ld32s_i64:
    case INDEX_op_ld_i32:
    case INDEX_op_ld_i64:
    case INDEX_op_st8_i32:
    case INDEX_op_st8_i64:
    case INDEX_op_st16_i32:
    case INDEX_op_st16_i64:
    case INDEX_op_st32_i64:
    case INDEX_op_st_i32:
    case INDEX_op_st_i64:
        tci_args_rrs(&tb_ptr, &r0, &r1, &s2);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %d",
                           op_name, str_r(r0), str_r(r1), s2);
        break;

    case INDEX_op_mov_i32:
    case INDEX_op_mov_i64:
    case INDEX_op_ext8s_i32:
    case INDEX_op_ext8s_i64:
    case INDEX_op_ext8u_i32:
    case INDEX_op_ext8u_i64:
    case INDEX_op_ext16s_i32:
    case INDEX_op_ext16s_i64:
    case INDEX_op_ext16u_i32:
    case INDEX_op_ext32s_i64:
    case INDEX_op_ext32u_i64:
    case INDEX_op_ext_i32_i64:
    case INDEX_op_extu_i32_i64:
    case INDEX_op_bswap16_i32:
    case INDEX_op_bswap16_i64:
    case INDEX_op_bswap32_i32:
    case INDEX_op_bswap32_i64:
    case INDEX_op_bswap64_i64:
    case INDEX_op_not_i32:
    case INDEX_op_not_i64:
    case INDEX_op_neg_i32:
    case INDEX_op_neg_i64:
        tci_args_rr(&tb_ptr, &r0, &r1);
        info->fprintf_func(info->stream, "%-12s  %s, %s",
                           op_name, str_r(r0), str_r(r1));
        break;

    case INDEX_op_add_i32:
    case INDEX_op_add_i64:
    case INDEX_op_sub_i32:
    case INDEX_op_sub_i64:
    case INDEX_op_mul_i32:
    case INDEX_op_mul_i64:
    case INDEX_op_and_i32:
    case INDEX_op_and_i64:
    case INDEX_op_or_i32:
    case INDEX_op_or_i64:
    case INDEX_op_xor_i32:
    case INDEX_op_xor_i64:
    case INDEX_op_div_i32:
    case INDEX_op_div_i64:
    case INDEX_op_rem_i32:
    case INDEX_op_rem_i64:
    case INDEX_op_divu_i32:
    case INDEX_op_divu_i64:
    case INDEX_op_remu_i32:
    case INDEX_op_remu_i64:
    case INDEX_op_shl_i32:
    case INDEX_op_shl_i64:
    case INDEX_op_shr_i32:
    case INDEX_op_shr_i64:
    case INDEX_op_sar_i32:
    case INDEX_op_sar_i64:
    case INDEX_op_rotl_i32:
    case INDEX_op_rotl_i64:
    case INDEX_op_rotr_i32:
    case INDEX_op_rotr_i64:
        tci_args_rrr(&tb_ptr, &r0, &r1, &r2);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s",
                           op_name, str_r(r0), str_r(r1), str_r(r2));
        break;

    case INDEX_op_deposit_i32:
    case INDEX_op_deposit_i64:
        tci_args_rrrbb(&tb_ptr, &r0, &r1, &r2, &pos, &len);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %d, %d",
                           op_name, str_r(r0), str_r(r1), str_r(r2), pos, len);
        break;

#if TCG_TARGET_REG_BITS == 32
    case INDEX_op_setcond2_i32:
        tci_args_rrrrrc(&tb_ptr, &r0, &r1, &r2, &r3, &r4, &c);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %s, %s, %s",
                           op_name, str_r(r0), str_r(r1), str_r(r2),
                           str_r(r3), str_r(r4), str_c(c));
        break;

    case INDEX_op_brcond2_i32:
        tci_args_rrrrcl(&tb_ptr, &r0, &r1, &r2, &r3, &c, &ptr);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %s, %s, %p",
                           op_name, str_r(r0), str_r(r1),
                           str_r(r2), str_r(r3), str_c(c), ptr);
        break;

    case INDEX_op_mulu2_i32:
        tci_args_rrrr(&tb_ptr, &r0, &r1, &r2, &r3);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %s",
                           op_name, str_r(r0), str_r(r1),
                           str_r(r2), str_r(r3));
        break;

    case INDEX_op_add2_i32:
    case INDEX_op_sub2_i32:
        tci_args_rrrrrr(&tb_ptr, &r0, &r1, &r2, &r3, &r4, &r5);
        info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %s, %s, %s",
                           op_name, str_r(r0), str_r(r1), str_r(r2),
                           str_r(r3), str_r(r4), str_r(r5));
        break;
#endif

    case INDEX_op_qemu_ld_i64:
    case INDEX_op_qemu_st_i64:
        len = DIV_ROUND_UP(64, TCG_TARGET_REG_BITS);
        goto do_qemu_ldst;
    case INDEX_op_qemu_ld_i32:
    case INDEX_op_qemu_st_i32:
        len = 1;
    do_qemu_ldst:
        len += DIV_ROUND_UP(TARGET_LONG_BITS, TCG_TARGET_REG_BITS);
        switch (len) {
        case 2:
            tci_args_rrm(&tb_ptr, &r0, &r1, &oi);
            info->fprintf_func(info->stream, "%-12s  %s, %s, %x",
                               op_name, str_r(r0), str_r(r1), oi);
            break;
        case 3:
            tci_args_rrrm(&tb_ptr, &r0, &r1, &r2, &oi);
            info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %x",
                               op_name, str_r(r0), str_r(r1), str_r(r2), oi);
            break;
        case 4:
            tci_args_rrrrm(&tb_ptr, &r0, &r1, &r2, &r3, &oi);
            info->fprintf_func(info->stream, "%-12s  %s, %s, %s, %s, %x",
                               op_name, str_r(r0), str_r(r1),
                               str_r(r2), str_r(r3), oi);
            break;
        default:
            g_assert_not_reached();
        }
        break;

    default:
        info->fprintf_func(info->stream, "illegal opcode %d", op);
        break;
    }

    return length;
}