Archipelago » qemu

/*

 * Tiny Code Generator for QEMU

 *

 * Copyright (c) 2008 Fabrice Bellard

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {

    "%g0",

    "%g1",

    "%g2",

    "%g3",

    "%g4",

    "%g5",

    "%g6",

    "%g7",

    "%o0",

    "%o1",

    "%o2",

    "%o3",

    "%o4",

    "%o5",

    "%o6",

    "%o7",

    "%l0",

    "%l1",

    "%l2",

    "%l3",

    "%l4",

    "%l5",

    "%l6",

    "%l7",

    "%i0",

    "%i1",

    "%i2",

    "%i3",

    "%i4",

    "%i5",

    "%i6",

    "%i7",

};

static const int tcg_target_reg_alloc_order[] = {

    TCG_REG_L0,

    TCG_REG_L1,

    TCG_REG_L2,

    TCG_REG_L3,

    TCG_REG_L4,

    TCG_REG_L5,

    TCG_REG_L6,

    TCG_REG_L7,

    TCG_REG_I0,

    TCG_REG_I1,

    TCG_REG_I2,

    TCG_REG_I3,

    TCG_REG_I4,

};

static const int tcg_target_call_iarg_regs[6] = {

    TCG_REG_O0,

    TCG_REG_O1,

    TCG_REG_O2,

    TCG_REG_O3,

    TCG_REG_O4,

    TCG_REG_O5,

};

static const int tcg_target_call_oarg_regs[2] = {

    TCG_REG_O0,

    TCG_REG_O1,

};

static inline int check_fit_tl(tcg_target_long val, unsigned int bits)

{

    return (val << ((sizeof(tcg_target_long) * 8 - bits))

            >> (sizeof(tcg_target_long) * 8 - bits)) == val;

}

static inline int check_fit_i32(uint32_t val, unsigned int bits)

{

    return ((val << (32 - bits)) >> (32 - bits)) == val;

}

static void patch_reloc(uint8_t *code_ptr, int type,

                        tcg_target_long value, tcg_target_long addend)

{

    value += addend;

    switch (type) {

    case R_SPARC_32:

        if (value != (uint32_t)value)

            tcg_abort();

        *(uint32_t *)code_ptr = value;

        break;

    case R_SPARC_WDISP22:

        value -= (long)code_ptr;

        value >>= 2;

        if (!check_fit_tl(value, 22))

            tcg_abort();

        *(uint32_t *)code_ptr = ((*(uint32_t *)code_ptr) & ~0x3fffff) | value;

        break;

    default:

        tcg_abort();

    }

}

/* maximum number of register used for input function arguments */

static inline int tcg_target_get_call_iarg_regs_count(int flags)

{

    return 6;

}

/* parse target specific constraints */

static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str)

{

    const char *ct_str;

    ct_str = *pct_str;

    switch (ct_str[0]) {

    case 'r':

    case 'L': /* qemu_ld/st constraint */

        ct->ct |= TCG_CT_REG;

        tcg_regset_set32(ct->u.regs, 0, 0xffffffff);

        tcg_regset_reset_reg(ct->u.regs, TCG_REG_I0);

        tcg_regset_reset_reg(ct->u.regs, TCG_REG_I1);

        break;

    case 'I':

        ct->ct |= TCG_CT_CONST_S11;

        break;

    case 'J':

        ct->ct |= TCG_CT_CONST_S13;

        break;

    default:

        return -1;

    }

    ct_str++;

    *pct_str = ct_str;

    return 0;

}

/* test if a constant matches the constraint */

static inline int tcg_target_const_match(tcg_target_long val,

                                         const TCGArgConstraint *arg_ct)

{

    int ct;

    ct = arg_ct->ct;

    if (ct & TCG_CT_CONST)

        return 1;

    else if ((ct & TCG_CT_CONST_S11) && check_fit_tl(val, 11))

        return 1;

    else if ((ct & TCG_CT_CONST_S13) && check_fit_tl(val, 13))

        return 1;

    else

        return 0;

}

#define INSN_OP(x)  ((x) << 30)

#define INSN_OP2(x) ((x) << 22)

#define INSN_OP3(x) ((x) << 19)

#define INSN_OPF(x) ((x) << 5)

#define INSN_RD(x)  ((x) << 25)

#define INSN_RS1(x) ((x) << 14)

#define INSN_RS2(x) (x)

#define INSN_IMM13(x) ((1 << 13) | ((x) & 0x1fff))

#define INSN_OFF22(x) (((x) >> 2) & 0x3fffff)

#define INSN_COND(x, a) (((x) << 25) | ((a) << 29))

#define COND_N     0x0

#define COND_E     0x1

#define COND_LE    0x2

#define COND_L     0x3

#define COND_LEU   0x4

#define COND_CS    0x5

#define COND_NEG   0x6

#define COND_VS    0x7

#define COND_A     0x8

#define COND_NE    0x9

#define COND_G     0xa

#define COND_GE    0xb

#define COND_GU    0xc

#define COND_CC    0xd

#define COND_POS   0xe

#define COND_VC    0xf

#define BA         (INSN_OP(0) | INSN_COND(COND_A, 0) | INSN_OP2(0x2))

#define ARITH_ADD  (INSN_OP(2) | INSN_OP3(0x00))

#define ARITH_AND  (INSN_OP(2) | INSN_OP3(0x01))

#define ARITH_OR   (INSN_OP(2) | INSN_OP3(0x02))

#define ARITH_ORCC (INSN_OP(2) | INSN_OP3(0x12))

#define ARITH_XOR  (INSN_OP(2) | INSN_OP3(0x03))

#define ARITH_SUB  (INSN_OP(2) | INSN_OP3(0x04))

#define ARITH_SUBCC (INSN_OP(2) | INSN_OP3(0x14))

#define ARITH_ADDX (INSN_OP(2) | INSN_OP3(0x10))

#define ARITH_SUBX (INSN_OP(2) | INSN_OP3(0x0c))

#define ARITH_UMUL (INSN_OP(2) | INSN_OP3(0x0a))

#define ARITH_UDIV (INSN_OP(2) | INSN_OP3(0x0e))

#define ARITH_SDIV (INSN_OP(2) | INSN_OP3(0x0f))

#define ARITH_MULX (INSN_OP(2) | INSN_OP3(0x09))

#define ARITH_UDIVX (INSN_OP(2) | INSN_OP3(0x0d))

#define ARITH_SDIVX (INSN_OP(2) | INSN_OP3(0x2d))

#define SHIFT_SLL  (INSN_OP(2) | INSN_OP3(0x25))

#define SHIFT_SRL  (INSN_OP(2) | INSN_OP3(0x26))

#define SHIFT_SRA  (INSN_OP(2) | INSN_OP3(0x27))

#define SHIFT_SLLX (INSN_OP(2) | INSN_OP3(0x25) | (1 << 12))

#define SHIFT_SRLX (INSN_OP(2) | INSN_OP3(0x26) | (1 << 12))

#define SHIFT_SRAX (INSN_OP(2) | INSN_OP3(0x27) | (1 << 12))

#define WRY        (INSN_OP(2) | INSN_OP3(0x30))

#define JMPL       (INSN_OP(2) | INSN_OP3(0x38))

#define SAVE       (INSN_OP(2) | INSN_OP3(0x3c))

#define RESTORE    (INSN_OP(2) | INSN_OP3(0x3d))

#define SETHI      (INSN_OP(0) | INSN_OP2(0x4))

#define CALL       INSN_OP(1)

#define LDUB       (INSN_OP(3) | INSN_OP3(0x01))

#define LDSB       (INSN_OP(3) | INSN_OP3(0x09))

#define LDUH       (INSN_OP(3) | INSN_OP3(0x02))

#define LDSH       (INSN_OP(3) | INSN_OP3(0x0a))

#define LDUW       (INSN_OP(3) | INSN_OP3(0x00))

#define LDSW       (INSN_OP(3) | INSN_OP3(0x08))

#define LDX        (INSN_OP(3) | INSN_OP3(0x0b))

#define STB        (INSN_OP(3) | INSN_OP3(0x05))

#define STH        (INSN_OP(3) | INSN_OP3(0x06))

#define STW        (INSN_OP(3) | INSN_OP3(0x04))

#define STX        (INSN_OP(3) | INSN_OP3(0x0e))

static inline void tcg_out_mov(TCGContext *s, int ret, int arg)

{

    tcg_out32(s, ARITH_OR | INSN_RD(ret) | INSN_RS1(arg) |

              INSN_RS2(TCG_REG_G0));

}

static inline void tcg_out_movi(TCGContext *s, TCGType type,

                                int ret, tcg_target_long arg)

{

#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)

    if (!check_fit_tl(arg, 32) && (arg & ~0xffffffff) != 0)

        fprintf(stderr, "unimplemented %s with constant %ld\n", __func__, arg);

#endif

    if (check_fit_i32(arg, 13))

        tcg_out32(s, ARITH_OR | INSN_RD(ret) | INSN_RS1(TCG_REG_G0) |

                  INSN_IMM13(arg));

    else {

        tcg_out32(s, SETHI | INSN_RD(ret) | ((arg & 0xfffffc00) >> 10));

        if (arg & 0x3ff)

            tcg_out32(s, ARITH_OR | INSN_RD(ret) | INSN_RS1(ret) |

                      INSN_IMM13(arg & 0x3ff));

    }

}

static inline void tcg_out_ld_raw(TCGContext *s, int ret,

                                  tcg_target_long arg)

{

    tcg_out32(s, SETHI | INSN_RD(ret) | (((uint32_t)arg & 0xfffffc00) >> 10));

    tcg_out32(s, LDUW | INSN_RD(ret) | INSN_RS1(ret) |

              INSN_IMM13(arg & 0x3ff));

}

static inline void tcg_out_ld_ptr(TCGContext *s, int ret,

                                  tcg_target_long arg)

{

#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)

    if (!check_fit_tl(arg, 32) && (arg & ~0xffffffff) != 0)

        fprintf(stderr, "unimplemented %s with offset %ld\n", __func__, arg);

    if (!check_fit_i32(arg, 13))

        tcg_out32(s, SETHI | INSN_RD(ret) | (((uint32_t)arg & 0xfffffc00) >> 10));

    tcg_out32(s, LDX | INSN_RD(ret) | INSN_RS1(ret) |

              INSN_IMM13(arg & 0x3ff));

#else

    tcg_out_ld_raw(s, ret, arg);

#endif

}

static inline void tcg_out_ldst(TCGContext *s, int ret, int addr, int offset, int op)

{

    if (check_fit_tl(offset, 13))

        tcg_out32(s, op | INSN_RD(ret) | INSN_RS1(addr) |

                  INSN_IMM13(offset));

    else {

        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I5, offset);

        tcg_out32(s, op | INSN_RD(ret) | INSN_RS1(TCG_REG_I5) |

                  INSN_RS2(addr));

    }

}

static inline void tcg_out_ld(TCGContext *s, TCGType type, int ret,

                              int arg1, tcg_target_long arg2)

{

    if (type == TCG_TYPE_I32)

        tcg_out_ldst(s, ret, arg1, arg2, LDUW);

    else

        tcg_out_ldst(s, ret, arg1, arg2, LDX);

}

static inline void tcg_out_st(TCGContext *s, TCGType type, int arg,

                              int arg1, tcg_target_long arg2)

{

    if (type == TCG_TYPE_I32)

        tcg_out_ldst(s, arg, arg1, arg2, STW);

    else

        tcg_out_ldst(s, arg, arg1, arg2, STX);

}

static inline void tcg_out_arith(TCGContext *s, int rd, int rs1, int rs2,

                                 int op)

{

    tcg_out32(s, op | INSN_RD(rd) | INSN_RS1(rs1) |

              INSN_RS2(rs2));

}

static inline void tcg_out_arithi(TCGContext *s, int rd, int rs1, int offset,

                                  int op)

{

    tcg_out32(s, op | INSN_RD(rd) | INSN_RS1(rs1) |

              INSN_IMM13(offset));

}

static inline void tcg_out_sety(TCGContext *s, tcg_target_long val)

{

    if (val == 0 || val == -1)

        tcg_out32(s, WRY | INSN_IMM13(val));

    else

        fprintf(stderr, "unimplemented sety %ld\n", (long)val);

}

static inline void tcg_out_addi(TCGContext *s, int reg, tcg_target_long val)

{

    if (val != 0) {

        if (check_fit_tl(val, 13))

            tcg_out_arithi(s, reg, reg, val, ARITH_ADD);

        else {

            tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I5, val);

            tcg_out_arith(s, reg, reg, TCG_REG_I5, ARITH_ADD);

        }

    }

}

static inline void tcg_out_nop(TCGContext *s)

{

    tcg_out32(s, SETHI | INSN_RD(TCG_REG_G0) | 0);

}

static void tcg_out_branch(TCGContext *s, int opc, int label_index)

{

    int32_t val;

    TCGLabel *l = &s->labels[label_index];

    if (l->has_value) {

        val = l->u.value - (tcg_target_long)s->code_ptr;

        tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2)

                      | INSN_OFF22(l->u.value - (unsigned long)s->code_ptr)));

    } else {

        tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP22, label_index, 0);

        tcg_out32(s, (INSN_OP(0) | INSN_COND(opc, 0) | INSN_OP2(0x2) | 0));

    }

}

static const uint8_t tcg_cond_to_bcond[10] = {

    [TCG_COND_EQ] = COND_E,

    [TCG_COND_NE] = COND_NE,

    [TCG_COND_LT] = COND_L,

    [TCG_COND_GE] = COND_GE,

    [TCG_COND_LE] = COND_LE,

    [TCG_COND_GT] = COND_G,

    [TCG_COND_LTU] = COND_CS,

    [TCG_COND_GEU] = COND_CC,

    [TCG_COND_LEU] = COND_LEU,

    [TCG_COND_GTU] = COND_GU,

};

static void tcg_out_brcond(TCGContext *s, int cond,

                           TCGArg arg1, TCGArg arg2, int const_arg2,

                           int label_index)

{

    if (const_arg2 && arg2 == 0)

        /* orcc r, r, %g0 */

        tcg_out_arith(s, TCG_REG_G0, TCG_REG_G0, arg1, ARITH_ORCC);

    else

        /* subcc r1, r2, %g0 */

        tcg_out_arith(s, TCG_REG_G0, arg1, arg2, ARITH_SUBCC);

    tcg_out_branch(s, tcg_cond_to_bcond[cond], label_index);

    tcg_out_nop(s);

}

/* Generate global QEMU prologue and epilogue code */

void tcg_target_qemu_prologue(TCGContext *s)

{

    tcg_out32(s, SAVE | INSN_RD(TCG_REG_O6) | INSN_RS1(TCG_REG_O6) |

              INSN_IMM13(-TCG_TARGET_STACK_MINFRAME));

    tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_I0) |

              INSN_RS2(TCG_REG_G0));

    tcg_out_nop(s);

}

#if defined(CONFIG_SOFTMMU)

extern void __ldb_mmu(void);

extern void __ldw_mmu(void);

extern void __ldl_mmu(void);

extern void __ldq_mmu(void);

extern void __stb_mmu(void);

extern void __stw_mmu(void);

extern void __stl_mmu(void);

extern void __stq_mmu(void);

static const void * const qemu_ld_helpers[4] = {

    __ldb_mmu,

    __ldw_mmu,

    __ldl_mmu,

    __ldq_mmu,

};

static const void * const qemu_st_helpers[4] = {

    __stb_mmu,

    __stw_mmu,

    __stl_mmu,

    __stq_mmu,

};

#endif

static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args,

                            int opc)

{

    int addr_reg, data_reg, r0, r1, mem_index, s_bits, bswap, ld_op;

#if defined(CONFIG_SOFTMMU)

    uint8_t *label1_ptr, *label2_ptr;

#endif

    data_reg = *args++;

    addr_reg = *args++;

    mem_index = *args;

    s_bits = opc & 3;

    r0 = TCG_REG_I0;

    r1 = TCG_REG_I1;

#if TARGET_LONG_BITS == 32

    ld_op = LDUW;

#else

    ld_op = LDX;

#endif

#if defined(CONFIG_SOFTMMU)

    /* srl addr_reg, x, r1 */

    tcg_out_arithi(s, r1, addr_reg, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS,

                   SHIFT_SRL);

    /* and addr_reg, x, r0 */

    tcg_out_arithi(s, r0, addr_reg, TARGET_PAGE_MASK | ((1 << s_bits) - 1),

                   ARITH_AND);

    /* and r1, x, r1 */

    tcg_out_arithi(s, r1, r1, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS,

                   ARITH_AND);

    /* add r1, x, r1 */

    tcg_out_arithi(s, r1, r1, offsetof(CPUState, tlb_table[mem_index][0].addr_read),

                   ARITH_ADD);

    /* ld [env + r1], r1 */

    tcg_out_ldst(s, r1, TCG_AREG0, r1, ld_op);

    /* subcc r0, r1, %g0 */

    tcg_out_arith(s, TCG_REG_G0, r0, r1, ARITH_SUBCC);

    /* will become:

       be label1 */

    label1_ptr = s->code_ptr;

    tcg_out32(s, 0);

    /* mov (delay slot)*/

    tcg_out_mov(s, r0, addr_reg);

    /* XXX: move that code at the end of the TB */

    tcg_out32(s, CALL | ((((tcg_target_ulong)qemu_ld_helpers[s_bits]

                           - (tcg_target_ulong)s->code_ptr) >> 2)

                         & 0x3fffffff));

    /* mov (delay slot)*/

    tcg_out_movi(s, TCG_TYPE_I32, r1, mem_index);

    switch(opc) {

    case 0 | 4:

        /* sll i0, 24/56, i0 */

        tcg_out_arithi(s, TCG_REG_I0, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 8, SHIFT_SLL);

        /* sra i0, 24/56, data_reg */

        tcg_out_arithi(s, data_reg, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 8, SHIFT_SRA);

        break;

    case 1 | 4:

        /* sll i0, 16/48, i0 */

        tcg_out_arithi(s, TCG_REG_I0, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 16, SHIFT_SLL);

        /* sra i0, 16/48, data_reg */

        tcg_out_arithi(s, data_reg, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 16, SHIFT_SRA);

        break;

    case 2 | 4:

        /* sll i0, 32, i0 */

        tcg_out_arithi(s, TCG_REG_I0, TCG_REG_I0, 32, SHIFT_SLL);

        /* sra i0, 32, data_reg */

        tcg_out_arithi(s, data_reg, TCG_REG_I0, 32, SHIFT_SRA);

        break;

    case 0:

    case 1:

    case 2:

    case 3:

    default:

        /* mov */

        tcg_out_mov(s, data_reg, TCG_REG_I0);

        break;

    }

    /* will become:

       ba label2 */

    label2_ptr = s->code_ptr;

    tcg_out32(s, 0);

    /* label1: */

    *label1_ptr = (INSN_OP(0) | INSN_COND(COND_A, 0) | INSN_OP2(0x2) |

                   INSN_OFF22((unsigned long)label1_ptr -

                              (unsigned long)s->code_ptr));

    /* ld [r1 + x], r1 */

    tcg_out_ldst(s, r1, r1, offsetof(CPUTLBEntry, addend) -

                 offsetof(CPUTLBEntry, addr_read), ld_op);

    /* add x(r1), r0 */

    tcg_out_arith(s, r0, r1, r0, ARITH_ADD);

#else

    r0 = addr_reg;

#endif

#ifdef TARGET_WORDS_BIGENDIAN

    bswap = 0;

#else

    bswap = 1;

#endif

    switch(opc) {

    case 0:

        /* ldub [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDUB);

        break;

    case 0 | 4:

        /* ldsb [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDSB);

        break;

    case 1:

        /* lduh [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDUH);

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        break;

    case 1 | 4:

        /* ldsh [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDSH);

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        break;

    case 2:

        /* lduw [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDUW);

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        break;

    case 2 | 4:

        /* ldsw [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDSW);

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        break;

    case 3:

        /* ldx [r0], data_reg */

        tcg_out_ldst(s, data_reg, r0, 0, LDX);

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        break;

    default:

        tcg_abort();

    }

#if defined(CONFIG_SOFTMMU)

    /* label2: */

    *label2_ptr = (INSN_OP(0) | INSN_COND(COND_A, 0) | INSN_OP2(0x2) |

                   INSN_OFF22((unsigned long)label2_ptr -

                              (unsigned long)s->code_ptr));

#endif

}

static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args,

                            int opc)

{

    int addr_reg, data_reg, r0, r1, mem_index, s_bits, bswap, ld_op;

#if defined(CONFIG_SOFTMMU)

    uint8_t *label1_ptr, *label2_ptr;

#endif

    data_reg = *args++;

    addr_reg = *args++;

    mem_index = *args;

    s_bits = opc;

    r0 = TCG_REG_I5;

    r1 = TCG_REG_I4;

#if TARGET_LONG_BITS == 32

    ld_op = LDUW;

#else

    ld_op = LDX;

#endif

#if defined(CONFIG_SOFTMMU)

    /* srl addr_reg, x, r1 */

    tcg_out_arithi(s, r1, addr_reg, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS,

                   SHIFT_SRL);

    /* and addr_reg, x, r0 */

    tcg_out_arithi(s, r0, addr_reg, TARGET_PAGE_MASK | ((1 << s_bits) - 1),

                   ARITH_AND);

    /* and r1, x, r1 */

    tcg_out_arithi(s, r1, r1, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS,

                   ARITH_AND);

    /* add r1, x, r1 */

    tcg_out_arithi(s, r1, r1,

                   offsetof(CPUState, tlb_table[mem_index][0].addr_write),

                   ARITH_ADD);

    /* ld [env + r1], r1 */

    tcg_out_ldst(s, r1, TCG_AREG0, r1, ld_op);

    /* subcc r0, r1, %g0 */

    tcg_out_arith(s, TCG_REG_G0, r0, r1, ARITH_SUBCC);

    /* will become:

       be label1 */

    label1_ptr = s->code_ptr;

    tcg_out32(s, 0);

    /* mov (delay slot)*/

    tcg_out_mov(s, r0, addr_reg);

    switch(opc) {

    case 0 | 4:

        /* sll i0, 24/56, i0 */

        tcg_out_arithi(s, TCG_REG_I0, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 8, SHIFT_SLL);

        /* sra i0, 24/56, data_reg */

        tcg_out_arithi(s, data_reg, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 8, SHIFT_SRA);

        break;

    case 1 | 4:

        /* sll i0, 16/48, i0 */

        tcg_out_arithi(s, TCG_REG_I0, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 16, SHIFT_SLL);

        /* sra i0, 16/48, data_reg */

        tcg_out_arithi(s, data_reg, TCG_REG_I0,

                       sizeof(tcg_target_long) * 8 - 16, SHIFT_SRA);

        break;

    case 2 | 4:

        /* sll i0, 32, i0 */

        tcg_out_arithi(s, TCG_REG_I0, TCG_REG_I0, 32, SHIFT_SLL);

        /* sra i0, 32, data_reg */

        tcg_out_arithi(s, data_reg, TCG_REG_I0, 32, SHIFT_SRA);

        break;

    case 0:

    case 1:

    case 2:

    case 3:

    default:

        /* mov */

        tcg_out_mov(s, data_reg, TCG_REG_I0);

        break;

    }

    tcg_out32(s, CALL | ((((tcg_target_ulong)qemu_st_helpers[s_bits]

                           - (tcg_target_ulong)s->code_ptr) >> 2)

                         & 0x3fffffff));

    /* mov (delay slot)*/

    tcg_out_movi(s, TCG_TYPE_I32, r1, mem_index);

    /* will become:

       ba label2 */

    label2_ptr = s->code_ptr;

    tcg_out32(s, 0);

    /* label1: */

    *label1_ptr = (INSN_OP(0) | INSN_COND(COND_A, 0) | INSN_OP2(0x2) |

                   INSN_OFF22((unsigned long)label1_ptr -

                              (unsigned long)s->code_ptr));

    /* ld [r1 + x], r1 */

    tcg_out_ldst(s, r1, r1, offsetof(CPUTLBEntry, addend) -

                 offsetof(CPUTLBEntry, addr_write), ld_op);

    /* add x(r1), r0 */

    tcg_out_arith(s, r0, r1, r0, ARITH_ADD);

#else

    r0 = addr_reg;

#endif

#ifdef TARGET_WORDS_BIGENDIAN

    bswap = 0;

#else

    bswap = 1;

#endif

    switch(opc) {

    case 0:

        /* stb data_reg, [r0] */

        tcg_out_ldst(s, data_reg, r0, 0, STB);

        break;

    case 1:

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        /* sth data_reg, [r0] */

        tcg_out_ldst(s, data_reg, r0, 0, STH);

        break;

    case 2:

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        /* stw data_reg, [r0] */

        tcg_out_ldst(s, data_reg, r0, 0, STW);

        break;

    case 3:

        if (bswap) {

            fprintf(stderr, "unimplemented %s with bswap\n", __func__);

        }

        /* stx data_reg, [r0] */

        tcg_out_ldst(s, data_reg, r0, 0, STX);

        break;

    default:

        tcg_abort();

    }

#if defined(CONFIG_SOFTMMU)

    /* label2: */

    *label2_ptr = (INSN_OP(0) | INSN_COND(COND_A, 0) | INSN_OP2(0x2) |

                   INSN_OFF22((unsigned long)label2_ptr -

                              (unsigned long)s->code_ptr));

#endif

}

static inline void tcg_out_op(TCGContext *s, int opc, const TCGArg *args,

                              const int *const_args)

{

    int c;

    switch (opc) {

    case INDEX_op_exit_tb:

        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_I0, args[0]);

        tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_I7) |

                  INSN_IMM13(8));

        tcg_out32(s, RESTORE | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_G0) |

                      INSN_RS2(TCG_REG_G0));

        break;

    case INDEX_op_goto_tb:

        if (s->tb_jmp_offset) {

            /* direct jump method */

            tcg_out32(s, SETHI | INSN_RD(TCG_REG_I5) |

                      ((args[0] & 0xffffe000) >> 10));

            tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_I5) |

                      INSN_IMM13((args[0] & 0x1fff)));

            s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf;

        } else {

            /* indirect jump method */

            tcg_out_ld_ptr(s, TCG_REG_I5, (tcg_target_long)(s->tb_next + args[0]));

            tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_I5) |

                      INSN_RS2(TCG_REG_G0));

        }

        tcg_out_nop(s);

        s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;

        break;

    case INDEX_op_call:

        if (const_args[0]) {

            tcg_out32(s, CALL | ((((tcg_target_ulong)args[0]

                                  - (tcg_target_ulong)s->code_ptr) >> 2)

                                 & 0x3fffffff));

            tcg_out_nop(s);

        } else {

            tcg_out_ld_ptr(s, TCG_REG_I5, (tcg_target_long)(s->tb_next + args[0]));

            tcg_out32(s, JMPL | INSN_RD(TCG_REG_O7) | INSN_RS1(TCG_REG_I5) |

                      INSN_RS2(TCG_REG_G0));

            tcg_out_nop(s);

        }

        break;

    case INDEX_op_jmp:

    case INDEX_op_br:

        tcg_out_branch(s, COND_A, args[0]);

        tcg_out_nop(s);

        break;

    case INDEX_op_movi_i32:

        tcg_out_movi(s, TCG_TYPE_I32, args[0], (uint32_t)args[1]);

        break;

#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)

#define OP_32_64(x)                             \

        glue(glue(case INDEX_op_, x), _i32:)    \

        glue(glue(case INDEX_op_, x), _i64:)

#else

#define OP_32_64(x)                             \

        glue(glue(case INDEX_op_, x), _i32:)

#endif

        OP_32_64(ld8u);

        tcg_out_ldst(s, args[0], args[1], args[2], LDUB);

        break;

        OP_32_64(ld8s);

        tcg_out_ldst(s, args[0], args[1], args[2], LDSB);

        break;

        OP_32_64(ld16u);

        tcg_out_ldst(s, args[0], args[1], args[2], LDUH);

        break;

        OP_32_64(ld16s);

        tcg_out_ldst(s, args[0], args[1], args[2], LDSH);

        break;

    case INDEX_op_ld_i32:

#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)

    case INDEX_op_ld32u_i64:

#endif

        tcg_out_ldst(s, args[0], args[1], args[2], LDUW);

        break;

        OP_32_64(st8);

        tcg_out_ldst(s, args[0], args[1], args[2], STB);

        break;

        OP_32_64(st16);

        tcg_out_ldst(s, args[0], args[1], args[2], STH);

        break;

    case INDEX_op_st_i32:

#if defined(__sparc_v9__) && !defined(__sparc_v8plus__)

    case INDEX_op_st32_i64:

#endif

        tcg_out_ldst(s, args[0], args[1], args[2], STW);

        break;

        OP_32_64(add);

        c = ARITH_ADD;

        goto gen_arith32;

        OP_32_64(sub);

        c = ARITH_SUB;

        goto gen_arith32;