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.

 */

#include "tcg-be-null.h"

#ifndef NDEBUG

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",

};

#endif

/* Define some temporary registers.  T2 is used for constant generation.  */

#define TCG_REG_T1  TCG_REG_G1

#define TCG_REG_T2  TCG_REG_O7

#ifdef CONFIG_USE_GUEST_BASE

# define TCG_GUEST_BASE_REG TCG_REG_I5

#else

# define TCG_GUEST_BASE_REG TCG_REG_G0

#endif

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,

    TCG_REG_I5,

    TCG_REG_G2,

    TCG_REG_G3,

    TCG_REG_G4,

    TCG_REG_G5,

    TCG_REG_O0,

    TCG_REG_O1,

    TCG_REG_O2,

    TCG_REG_O3,

    TCG_REG_O4,

    TCG_REG_O5,

};

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[] = {

    TCG_REG_O0,

    TCG_REG_O1,

    TCG_REG_O2,

    TCG_REG_O3,

};

#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_ASI(x) ((x) << 5)

#define INSN_IMM10(x) ((1 << 13) | ((x) & 0x3ff))

#define INSN_IMM11(x) ((1 << 13) | ((x) & 0x7ff))

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

#define INSN_OFF16(x) ((((x) >> 2) & 0x3fff) | ((((x) >> 16) & 3) << 20))

#define INSN_OFF19(x) (((x) >> 2) & 0x07ffff)

#define INSN_COND(x) ((x) << 25)

#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) | INSN_OP2(0x2))

#define RCOND_Z    1

#define RCOND_LEZ  2

#define RCOND_LZ   3

#define RCOND_NZ   5

#define RCOND_GZ   6

#define RCOND_GEZ  7

#define MOVCC_ICC  (1 << 18)

#define MOVCC_XCC  (1 << 18 | 1 << 12)

#define BPCC_ICC   0

#define BPCC_XCC   (2 << 20)

#define BPCC_PT    (1 << 19)

#define BPCC_PN    0

#define BPCC_A     (1 << 29)

#define BPR_PT     BPCC_PT

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

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

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

#define ARITH_ANDN (INSN_OP(2) | INSN_OP3(0x05))

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

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

#define ARITH_ORN  (INSN_OP(2) | INSN_OP3(0x06))

#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(0x08))

#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 ARITH_MOVCC (INSN_OP(2) | INSN_OP3(0x2c))

#define ARITH_MOVR (INSN_OP(2) | INSN_OP3(0x2f))

#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 RDY        (INSN_OP(2) | INSN_OP3(0x28) | INSN_RS1(0))

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

#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))

#define LDUBA      (INSN_OP(3) | INSN_OP3(0x11))

#define LDSBA      (INSN_OP(3) | INSN_OP3(0x19))

#define LDUHA      (INSN_OP(3) | INSN_OP3(0x12))

#define LDSHA      (INSN_OP(3) | INSN_OP3(0x1a))

#define LDUWA      (INSN_OP(3) | INSN_OP3(0x10))

#define LDSWA      (INSN_OP(3) | INSN_OP3(0x18))

#define LDXA       (INSN_OP(3) | INSN_OP3(0x1b))

#define STBA       (INSN_OP(3) | INSN_OP3(0x15))

#define STHA       (INSN_OP(3) | INSN_OP3(0x16))

#define STWA       (INSN_OP(3) | INSN_OP3(0x14))

#define STXA       (INSN_OP(3) | INSN_OP3(0x1e))

#ifndef ASI_PRIMARY_LITTLE

#define ASI_PRIMARY_LITTLE 0x88

#endif

#define LDUH_LE    (LDUHA | INSN_ASI(ASI_PRIMARY_LITTLE))

#define LDSH_LE    (LDSHA | INSN_ASI(ASI_PRIMARY_LITTLE))

#define LDUW_LE    (LDUWA | INSN_ASI(ASI_PRIMARY_LITTLE))

#define LDSW_LE    (LDSWA | INSN_ASI(ASI_PRIMARY_LITTLE))

#define LDX_LE     (LDXA  | INSN_ASI(ASI_PRIMARY_LITTLE))

#define STH_LE     (STHA  | INSN_ASI(ASI_PRIMARY_LITTLE))

#define STW_LE     (STWA  | INSN_ASI(ASI_PRIMARY_LITTLE))

#define STX_LE     (STXA  | INSN_ASI(ASI_PRIMARY_LITTLE))

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,

                        intptr_t value, intptr_t addend)

{

    uint32_t insn;

    value += addend;

    switch (type) {

    case R_SPARC_32:

        if (value != (uint32_t)value) {

            tcg_abort();

        }

        *(uint32_t *)code_ptr = value;

        break;

    case R_SPARC_WDISP16:

        value -= (intptr_t)code_ptr;

        if (!check_fit_tl(value >> 2, 16)) {

            tcg_abort();

        }

        insn = *(uint32_t *)code_ptr;

        insn &= ~INSN_OFF16(-1);

        insn |= INSN_OFF16(value);

        *(uint32_t *)code_ptr = insn;

        break;

    case R_SPARC_WDISP19:

        value -= (intptr_t)code_ptr;

        if (!check_fit_tl(value >> 2, 19)) {

            tcg_abort();

        }

        insn = *(uint32_t *)code_ptr;

        insn &= ~INSN_OFF19(-1);

        insn |= INSN_OFF19(value);

        *(uint32_t *)code_ptr = insn;

        break;

    default:

        tcg_abort();

    }

}

/* 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':

        ct->ct |= TCG_CT_REG;

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

        break;

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

        ct->ct |= TCG_CT_REG;

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

        // Helper args

        tcg_regset_reset_reg(ct->u.regs, TCG_REG_O0);

        tcg_regset_reset_reg(ct->u.regs, TCG_REG_O1);

        tcg_regset_reset_reg(ct->u.regs, TCG_REG_O2);

        break;

    case 'I':

        ct->ct |= TCG_CT_CONST_S11;

        break;

    case 'J':

        ct->ct |= TCG_CT_CONST_S13;

        break;

    case 'Z':

        ct->ct |= TCG_CT_CONST_ZERO;

        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 = arg_ct->ct;

    if (ct & TCG_CT_CONST) {

        return 1;

    } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) {

        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;

    }

}

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,

                                  uint32_t offset, int op)

{

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

              INSN_IMM13(offset));

}

static void tcg_out_arithc(TCGContext *s, int rd, int rs1,

                           int val2, int val2const, int op)

{

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

              | (val2const ? INSN_IMM13(val2) : INSN_RS2(val2)));

}

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

                               TCGReg ret, TCGReg arg)

{

    if (ret != arg) {

        tcg_out_arith(s, ret, arg, TCG_REG_G0, ARITH_OR);

    }

}

static inline void tcg_out_sethi(TCGContext *s, int ret, uint32_t arg)

{

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

}

static inline void tcg_out_movi_imm13(TCGContext *s, int ret, uint32_t arg)

{

    tcg_out_arithi(s, ret, TCG_REG_G0, arg, ARITH_OR);

}

static inline void tcg_out_movi_imm32(TCGContext *s, int ret, uint32_t arg)

{

    if (check_fit_tl(arg, 13))

        tcg_out_movi_imm13(s, ret, arg);

    else {

        tcg_out_sethi(s, ret, arg);

        if (arg & 0x3ff)

            tcg_out_arithi(s, ret, ret, arg & 0x3ff, ARITH_OR);

    }

}

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

                                TCGReg ret, tcg_target_long arg)

{

    /* All 32-bit constants, as well as 64-bit constants with

       no high bits set go through movi_imm32.  */

    if (TCG_TARGET_REG_BITS == 32

        || type == TCG_TYPE_I32

        || (arg & ~(tcg_target_long)0xffffffff) == 0) {

        tcg_out_movi_imm32(s, ret, arg);

    } else if (check_fit_tl(arg, 13)) {

        /* A 13-bit constant sign-extended to 64-bits.  */

        tcg_out_movi_imm13(s, ret, arg);

    } else if (check_fit_tl(arg, 32)) {

        /* A 32-bit constant sign-extended to 64-bits.  */

        tcg_out_sethi(s, ret, ~arg);

        tcg_out_arithi(s, ret, ret, (arg & 0x3ff) | -0x400, ARITH_XOR);

    } else {

        tcg_out_movi_imm32(s, ret, arg >> (TCG_TARGET_REG_BITS / 2));

        tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);

        tcg_out_movi_imm32(s, TCG_REG_T2, arg);

        tcg_out_arith(s, ret, ret, TCG_REG_T2, ARITH_OR);

    }

}

static inline void tcg_out_ldst_rr(TCGContext *s, int data, int a1,

                                   int a2, int op)

{

    tcg_out32(s, op | INSN_RD(data) | INSN_RS1(a1) | INSN_RS2(a2));

}

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_T1, offset);

        tcg_out_ldst_rr(s, ret, addr, TCG_REG_T1, op);

    }

}

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

                              TCGReg arg1, intptr_t arg2)

{

    tcg_out_ldst(s, ret, arg1, arg2, (type == TCG_TYPE_I32 ? LDUW : LDX));

}

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

                              TCGReg arg1, intptr_t arg2)

{

    tcg_out_ldst(s, arg, arg1, arg2, (type == TCG_TYPE_I32 ? STW : STX));

}

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

                                  tcg_target_long arg)

{

    if (!check_fit_tl(arg, 10)) {

        tcg_out_movi(s, TCG_TYPE_PTR, ret, arg & ~0x3ff);

    }

    tcg_out_ld(s, TCG_TYPE_PTR, ret, ret, arg & 0x3ff);

}

static inline void tcg_out_sety(TCGContext *s, int rs)

{

    tcg_out32(s, WRY | INSN_RS1(TCG_REG_G0) | INSN_RS2(rs));

}

static inline void tcg_out_rdy(TCGContext *s, int rd)

{

    tcg_out32(s, RDY | INSN_RD(rd));

}

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_T1, val);

            tcg_out_arith(s, reg, reg, TCG_REG_T1, ARITH_ADD);

        }

    }

}

static inline void tcg_out_andi(TCGContext *s, int rd, int rs,

                                tcg_target_long val)

{

    if (val != 0) {

        if (check_fit_tl(val, 13))

            tcg_out_arithi(s, rd, rs, val, ARITH_AND);

        else {

            tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T1, val);

            tcg_out_arith(s, rd, rs, TCG_REG_T1, ARITH_AND);

        }

    }

}

static void tcg_out_div32(TCGContext *s, int rd, int rs1,

                          int val2, int val2const, int uns)

{

    /* Load Y with the sign/zero extension of RS1 to 64-bits.  */

    if (uns) {

        tcg_out_sety(s, TCG_REG_G0);

    } else {

        tcg_out_arithi(s, TCG_REG_T1, rs1, 31, SHIFT_SRA);

        tcg_out_sety(s, TCG_REG_T1);

    }

    tcg_out_arithc(s, rd, rs1, val2, val2const,

                   uns ? ARITH_UDIV : ARITH_SDIV);

}

static inline void tcg_out_nop(TCGContext *s)

{

    tcg_out_sethi(s, TCG_REG_G0, 0);

}

static const uint8_t tcg_cond_to_bcond[] = {

    [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 const uint8_t tcg_cond_to_rcond[] = {

    [TCG_COND_EQ] = RCOND_Z,

    [TCG_COND_NE] = RCOND_NZ,

    [TCG_COND_LT] = RCOND_LZ,

    [TCG_COND_GT] = RCOND_GZ,

    [TCG_COND_LE] = RCOND_LEZ,

    [TCG_COND_GE] = RCOND_GEZ

};

static void tcg_out_bpcc0(TCGContext *s, int scond, int flags, int off19)

{

    tcg_out32(s, INSN_OP(0) | INSN_OP2(1) | INSN_COND(scond) | flags | off19);

}

static void tcg_out_bpcc(TCGContext *s, int scond, int flags, int label)

{

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

    int off19;

    if (l->has_value) {

        off19 = INSN_OFF19(l->u.value - (unsigned long)s->code_ptr);

    } else {

        /* Make sure to preserve destinations during retranslation.  */

        off19 = *(uint32_t *)s->code_ptr & INSN_OFF19(-1);

        tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP19, label, 0);

    }

    tcg_out_bpcc0(s, scond, flags, off19);

}

static void tcg_out_cmp(TCGContext *s, TCGArg c1, TCGArg c2, int c2const)

{

    tcg_out_arithc(s, TCG_REG_G0, c1, c2, c2const, ARITH_SUBCC);

}

static void tcg_out_brcond_i32(TCGContext *s, TCGCond cond, TCGArg arg1,

                               TCGArg arg2, int const_arg2, int label)

{

    tcg_out_cmp(s, arg1, arg2, const_arg2);

    tcg_out_bpcc(s, tcg_cond_to_bcond[cond], BPCC_ICC | BPCC_PT, label);

    tcg_out_nop(s);

}

static void tcg_out_movcc(TCGContext *s, TCGCond cond, int cc, TCGArg ret,

                          TCGArg v1, int v1const)

{

    tcg_out32(s, ARITH_MOVCC | cc | INSN_RD(ret)

              | INSN_RS1(tcg_cond_to_bcond[cond])

              | (v1const ? INSN_IMM11(v1) : INSN_RS2(v1)));

}

static void tcg_out_movcond_i32(TCGContext *s, TCGCond cond, TCGArg ret,

                                TCGArg c1, TCGArg c2, int c2const,

                                TCGArg v1, int v1const)

{

    tcg_out_cmp(s, c1, c2, c2const);

    tcg_out_movcc(s, cond, MOVCC_ICC, ret, v1, v1const);

}

#if TCG_TARGET_REG_BITS == 64

static void tcg_out_brcond_i64(TCGContext *s, TCGCond cond, TCGArg arg1,

                               TCGArg arg2, int const_arg2, int label)

{

    /* For 64-bit signed comparisons vs zero, we can avoid the compare.  */

    if (arg2 == 0 && !is_unsigned_cond(cond)) {

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

        int off16;

        if (l->has_value) {

            off16 = INSN_OFF16(l->u.value - (unsigned long)s->code_ptr);

        } else {

            /* Make sure to preserve destinations during retranslation.  */

            off16 = *(uint32_t *)s->code_ptr & INSN_OFF16(-1);

            tcg_out_reloc(s, s->code_ptr, R_SPARC_WDISP16, label, 0);

        }

        tcg_out32(s, INSN_OP(0) | INSN_OP2(3) | BPR_PT | INSN_RS1(arg1)

                  | INSN_COND(tcg_cond_to_rcond[cond]) | off16);

    } else {

        tcg_out_cmp(s, arg1, arg2, const_arg2);

        tcg_out_bpcc(s, tcg_cond_to_bcond[cond], BPCC_XCC | BPCC_PT, label);

    }

    tcg_out_nop(s);

}

static void tcg_out_movr(TCGContext *s, TCGCond cond, TCGArg ret, TCGArg c1,

                         TCGArg v1, int v1const)

{

    tcg_out32(s, ARITH_MOVR | INSN_RD(ret) | INSN_RS1(c1)

              | (tcg_cond_to_rcond[cond] << 10)

              | (v1const ? INSN_IMM10(v1) : INSN_RS2(v1)));

}

static void tcg_out_movcond_i64(TCGContext *s, TCGCond cond, TCGArg ret,

                                TCGArg c1, TCGArg c2, int c2const,

                                TCGArg v1, int v1const)

{

    /* For 64-bit signed comparisons vs zero, we can avoid the compare.

       Note that the immediate range is one bit smaller, so we must check

       for that as well.  */

    if (c2 == 0 && !is_unsigned_cond(cond)

        && (!v1const || check_fit_tl(v1, 10))) {

        tcg_out_movr(s, cond, ret, c1, v1, v1const);

    } else {

        tcg_out_cmp(s, c1, c2, c2const);

        tcg_out_movcc(s, cond, MOVCC_XCC, ret, v1, v1const);

    }

}

#else

static void tcg_out_brcond2_i32(TCGContext *s, TCGCond cond,

                                TCGArg al, TCGArg ah,

                                TCGArg bl, int blconst,

                                TCGArg bh, int bhconst, int label_dest)

{

    int scond, label_next = gen_new_label();

    tcg_out_cmp(s, ah, bh, bhconst);

    /* Note that we fill one of the delay slots with the second compare.  */

    switch (cond) {

    case TCG_COND_EQ:

        tcg_out_bpcc(s, COND_NE, BPCC_ICC | BPCC_PT, label_next);

        tcg_out_cmp(s, al, bl, blconst);

        tcg_out_bpcc(s, COND_E, BPCC_ICC | BPCC_PT, label_dest);

        break;

    case TCG_COND_NE:

        tcg_out_bpcc(s, COND_NE, BPCC_ICC | BPCC_PT, label_dest);

        tcg_out_cmp(s, al, bl, blconst);

        tcg_out_bpcc(s, COND_NE, BPCC_ICC | BPCC_PT, label_dest);

        break;

    default:

        scond = tcg_cond_to_bcond[tcg_high_cond(cond)];

        tcg_out_bpcc(s, scond, BPCC_ICC | BPCC_PT, label_dest);

        tcg_out_nop(s);

        tcg_out_bpcc(s, COND_NE, BPCC_ICC | BPCC_PT, label_next);

        tcg_out_cmp(s, al, bl, blconst);

        scond = tcg_cond_to_bcond[tcg_unsigned_cond(cond)];

        tcg_out_bpcc(s, scond, BPCC_ICC | BPCC_PT, label_dest);

        break;

    }

    tcg_out_nop(s);

    tcg_out_label(s, label_next, s->code_ptr);

}

#endif

static void tcg_out_setcond_i32(TCGContext *s, TCGCond cond, TCGArg ret,

                                TCGArg c1, TCGArg c2, int c2const)

{

    /* For 32-bit comparisons, we can play games with ADDX/SUBX.  */

    switch (cond) {

    case TCG_COND_LTU:

    case TCG_COND_GEU:

        /* The result of the comparison is in the carry bit.  */

        break;

    case TCG_COND_EQ:

    case TCG_COND_NE:

        /* For equality, we can transform to inequality vs zero.  */

        if (c2 != 0) {

            tcg_out_arithc(s, ret, c1, c2, c2const, ARITH_XOR);

        }

        c1 = TCG_REG_G0, c2 = ret, c2const = 0;

        cond = (cond == TCG_COND_EQ ? TCG_COND_GEU : TCG_COND_LTU);

        break;

    case TCG_COND_GTU:

    case TCG_COND_LEU:

        /* If we don't need to load a constant into a register, we can

           swap the operands on GTU/LEU.  There's no benefit to loading

           the constant into a temporary register.  */

        if (!c2const || c2 == 0) {

            TCGArg t = c1;

            c1 = c2;

            c2 = t;

            c2const = 0;

            cond = tcg_swap_cond(cond);

            break;

        }

        /* FALLTHRU */

    default:

        tcg_out_cmp(s, c1, c2, c2const);

        tcg_out_movi_imm13(s, ret, 0);

        tcg_out_movcc(s, cond, MOVCC_ICC, ret, 1, 1);

        return;

    }

    tcg_out_cmp(s, c1, c2, c2const);

    if (cond == TCG_COND_LTU) {

        tcg_out_arithi(s, ret, TCG_REG_G0, 0, ARITH_ADDX);

    } else {

        tcg_out_arithi(s, ret, TCG_REG_G0, -1, ARITH_SUBX);

    }

}

#if TCG_TARGET_REG_BITS == 64

static void tcg_out_setcond_i64(TCGContext *s, TCGCond cond, TCGArg ret,

                                TCGArg c1, TCGArg c2, int c2const)

{

    /* For 64-bit signed comparisons vs zero, we can avoid the compare

       if the input does not overlap the output.  */

    if (c2 == 0 && !is_unsigned_cond(cond) && c1 != ret) {

        tcg_out_movi_imm13(s, ret, 0);

        tcg_out_movr(s, cond, ret, c1, 1, 1);

    } else {

        tcg_out_cmp(s, c1, c2, c2const);

        tcg_out_movi_imm13(s, ret, 0);

        tcg_out_movcc(s, cond, MOVCC_XCC, ret, 1, 1);

    }

}

#else

static void tcg_out_setcond2_i32(TCGContext *s, TCGCond cond, TCGArg ret,

                                 TCGArg al, TCGArg ah,

                                 TCGArg bl, int blconst,

                                 TCGArg bh, int bhconst)

{

    int tmp = TCG_REG_T1;

    /* Note that the low parts are fully consumed before tmp is set.  */

    if (ret != ah && (bhconst || ret != bh)) {

        tmp = ret;

    }

    switch (cond) {

    case TCG_COND_EQ:

    case TCG_COND_NE:

        if (bl == 0 && bh == 0) {

            if (cond == TCG_COND_EQ) {

                tcg_out_arith(s, TCG_REG_G0, al, ah, ARITH_ORCC);

                tcg_out_movi(s, TCG_TYPE_I32, ret, 1);

            } else {

                tcg_out_arith(s, ret, al, ah, ARITH_ORCC);

            }

        } else {

            tcg_out_setcond_i32(s, cond, tmp, al, bl, blconst);

            tcg_out_cmp(s, ah, bh, bhconst);

            tcg_out_mov(s, TCG_TYPE_I32, ret, tmp);

        }

        tcg_out_movcc(s, TCG_COND_NE, MOVCC_ICC, ret, cond == TCG_COND_NE, 1);

        break;

    default:

        /* <= : ah < bh | (ah == bh && al <= bl) */

        tcg_out_setcond_i32(s, tcg_unsigned_cond(cond), tmp, al, bl, blconst);

        tcg_out_cmp(s, ah, bh, bhconst);

        tcg_out_mov(s, TCG_TYPE_I32, ret, tmp);

        tcg_out_movcc(s, TCG_COND_NE, MOVCC_ICC, ret, 0, 1);

        tcg_out_movcc(s, tcg_high_cond(cond), MOVCC_ICC, ret, 1, 1);

        break;

    }

}

#endif

static void tcg_out_addsub2(TCGContext *s, TCGArg rl, TCGArg rh,

                            TCGArg al, TCGArg ah, TCGArg bl, int blconst,

                            TCGArg bh, int bhconst, int opl, int oph)

{

    TCGArg tmp = TCG_REG_T1;

    /* Note that the low parts are fully consumed before tmp is set.  */

    if (rl != ah && (bhconst || rl != bh)) {

        tmp = rl;

    }

    tcg_out_arithc(s, tmp, al, bl, blconst, opl);

    tcg_out_arithc(s, rh, ah, bh, bhconst, oph);

    tcg_out_mov(s, TCG_TYPE_I32, rl, tmp);

}

/* Generate global QEMU prologue and epilogue code */

static void tcg_target_qemu_prologue(TCGContext *s)

{

    int tmp_buf_size, frame_size;

    /* The TCG temp buffer is at the top of the frame, immediately

       below the frame pointer.  */

    tmp_buf_size = CPU_TEMP_BUF_NLONGS * (int)sizeof(long);

    tcg_set_frame(s, TCG_REG_I6, TCG_TARGET_STACK_BIAS - tmp_buf_size,

                  tmp_buf_size);

    /* TCG_TARGET_CALL_STACK_OFFSET includes the stack bias, but is

       otherwise the minimal frame usable by callees.  */

    frame_size = TCG_TARGET_CALL_STACK_OFFSET - TCG_TARGET_STACK_BIAS;

    frame_size += TCG_STATIC_CALL_ARGS_SIZE + tmp_buf_size;

    frame_size += TCG_TARGET_STACK_ALIGN - 1;

    frame_size &= -TCG_TARGET_STACK_ALIGN;

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

              INSN_IMM13(-frame_size));

#ifdef CONFIG_USE_GUEST_BASE

    if (GUEST_BASE != 0) {

        tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, GUEST_BASE);

        tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);

    }

#endif

    tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_I1) |

              INSN_RS2(TCG_REG_G0));

    /* delay slot */

    tcg_out_nop(s);

    /* No epilogue required.  We issue ret + restore directly in the TB.  */

}

#if defined(CONFIG_SOFTMMU)

/* helper signature: helper_ld_mmu(CPUState *env, target_ulong addr,

   int mmu_idx) */

static const void * const qemu_ld_helpers[4] = {

    helper_ldb_mmu,

    helper_ldw_mmu,

    helper_ldl_mmu,

    helper_ldq_mmu,

};

/* helper signature: helper_st_mmu(CPUState *env, target_ulong addr,

   uintxx_t val, int mmu_idx) */

static const void * const qemu_st_helpers[4] = {

    helper_stb_mmu,

    helper_stw_mmu,

    helper_stl_mmu,

    helper_stq_mmu,

};

/* Perform the TLB load and compare.

   Inputs:

   ADDRLO_IDX contains the index into ARGS of the low part of the

   address; the high part of the address is at ADDR_LOW_IDX+1.

   MEM_INDEX and S_BITS are the memory context and log2 size of the load.

   WHICH is the offset into the CPUTLBEntry structure of the slot to read.

   This should be offsetof addr_read or addr_write.

   The result of the TLB comparison is in %[ix]cc.  The sanitized address

   is in the returned register, maybe %o0.  The TLB addend is in %o1.  */

static int tcg_out_tlb_load(TCGContext *s, int addrlo_idx, int mem_index,

                            int s_bits, const TCGArg *args, int which)

{

    const int addrlo = args[addrlo_idx];

    const int r0 = TCG_REG_O0;

    const int r1 = TCG_REG_O1;

    const int r2 = TCG_REG_O2;

    int addr = addrlo;

    int tlb_ofs;

    if (TCG_TARGET_REG_BITS == 32 && TARGET_LONG_BITS == 64) {

        /* Assemble the 64-bit address in R0.  */

        tcg_out_arithi(s, r0, addrlo, 0, SHIFT_SRL);

        tcg_out_arithi(s, r1, args[addrlo_idx + 1], 32, SHIFT_SLLX);

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

    }

    /* Shift the page number down to tlb-entry.  */

    tcg_out_arithi(s, r1, addrlo,

                   TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS, SHIFT_SRL);

    /* Mask out the page offset, except for the required alignment.  */

    tcg_out_andi(s, r0, addr, TARGET_PAGE_MASK | ((1 << s_bits) - 1));

    /* Compute tlb index, modulo tlb size.  */

    tcg_out_andi(s, r1, r1, (CPU_TLB_SIZE - 1) << CPU_TLB_ENTRY_BITS);

    /* Relative to the current ENV.  */

    tcg_out_arith(s, r1, TCG_AREG0, r1, ARITH_ADD);

    /* Find a base address that can load both tlb comparator and addend.  */

    tlb_ofs = offsetof(CPUArchState, tlb_table[mem_index][0]);

    if (!check_fit_tl(tlb_ofs + sizeof(CPUTLBEntry), 13)) {

        tcg_out_addi(s, r1, tlb_ofs);

        tlb_ofs = 0;

    }

    /* Load the tlb comparator and the addend.  */

    tcg_out_ld(s, TCG_TYPE_TL, r2, r1, tlb_ofs + which);

    tcg_out_ld(s, TCG_TYPE_PTR, r1, r1, tlb_ofs+offsetof(CPUTLBEntry, addend));

    /* subcc arg0, arg2, %g0 */

    tcg_out_cmp(s, r0, r2, 0);

    /* If the guest address must be zero-extended, do so now.  */

    if (TCG_TARGET_REG_BITS == 64 && TARGET_LONG_BITS == 32) {

        tcg_out_arithi(s, r0, addrlo, 0, SHIFT_SRL);

        return r0;

    }

    return addrlo;

}

#endif /* CONFIG_SOFTMMU */

static const int qemu_ld_opc[8] = {

#ifdef TARGET_WORDS_BIGENDIAN

    LDUB, LDUH, LDUW, LDX, LDSB, LDSH, LDSW, LDX

#else

    LDUB, LDUH_LE, LDUW_LE, LDX_LE, LDSB, LDSH_LE, LDSW_LE, LDX_LE

#endif

};

static const int qemu_st_opc[4] = {

#ifdef TARGET_WORDS_BIGENDIAN

    STB, STH, STW, STX

#else

    STB, STH_LE, STW_LE, STX_LE

#endif

};

static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int sizeop)

{

    int addrlo_idx = 1, datalo, datahi, addr_reg;

#if defined(CONFIG_SOFTMMU)

    int memi_idx, memi, s_bits, n;

    uint32_t *label_ptr[2];

#endif

    datahi = datalo = args[0];

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        datahi = args[1];

        addrlo_idx = 2;

    }

#if defined(CONFIG_SOFTMMU)

    memi_idx = addrlo_idx + 1 + (TARGET_LONG_BITS > TCG_TARGET_REG_BITS);

    memi = args[memi_idx];

    s_bits = sizeop & 3;

    addr_reg = tcg_out_tlb_load(s, addrlo_idx, memi, s_bits, args,

                                offsetof(CPUTLBEntry, addr_read));

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        int reg64;

        /* bne,pn %[xi]cc, label0 */

        label_ptr[0] = (uint32_t *)s->code_ptr;

        tcg_out_bpcc0(s, COND_NE, BPCC_PN

                      | (TARGET_LONG_BITS == 64 ? BPCC_XCC : BPCC_ICC), 0);

        /* TLB Hit.  */

        /* Load all 64-bits into an O/G register.  */

        reg64 = (datalo < 16 ? datalo : TCG_REG_O0);

        tcg_out_ldst_rr(s, reg64, addr_reg, TCG_REG_O1, qemu_ld_opc[sizeop]);

        /* Move the two 32-bit pieces into the destination registers.  */

        tcg_out_arithi(s, datahi, reg64, 32, SHIFT_SRLX);

        if (reg64 != datalo) {

            tcg_out_mov(s, TCG_TYPE_I32, datalo, reg64);

        }

        /* b,a,pt label1 */

        label_ptr[1] = (uint32_t *)s->code_ptr;

        tcg_out_bpcc0(s, COND_A, BPCC_A | BPCC_PT, 0);

    } else {

        /* The fast path is exactly one insn.  Thus we can perform the

           entire TLB Hit in the (annulled) delay slot of the branch

           over the TLB Miss case.  */

        /* beq,a,pt %[xi]cc, label0 */

        label_ptr[0] = NULL;

        label_ptr[1] = (uint32_t *)s->code_ptr;

        tcg_out_bpcc0(s, COND_E, BPCC_A | BPCC_PT

                      | (TARGET_LONG_BITS == 64 ? BPCC_XCC : BPCC_ICC), 0);

        /* delay slot */

        tcg_out_ldst_rr(s, datalo, addr_reg, TCG_REG_O1, qemu_ld_opc[sizeop]);

    }

    /* TLB Miss.  */

    if (label_ptr[0]) {

        *label_ptr[0] |= INSN_OFF19((unsigned long)s->code_ptr -

                                    (unsigned long)label_ptr[0]);

    }

    n = 0;

    tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[n++], TCG_AREG0);

    if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {

        tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n++],

                    args[addrlo_idx + 1]);

    }

    tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n++],

                args[addrlo_idx]);

    /* qemu_ld_helper[s_bits](arg0, arg1) */

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

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

                         & 0x3fffffff));

    /* delay slot */

    tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[n], memi);

    n = tcg_target_call_oarg_regs[0];

    /* datalo = sign_extend(arg0) */

    switch (sizeop) {

    case 0 | 4:

        /* Recall that SRA sign extends from bit 31 through bit 63.  */

        tcg_out_arithi(s, datalo, n, 24, SHIFT_SLL);

        tcg_out_arithi(s, datalo, datalo, 24, SHIFT_SRA);

        break;

    case 1 | 4:

        tcg_out_arithi(s, datalo, n, 16, SHIFT_SLL);

        tcg_out_arithi(s, datalo, datalo, 16, SHIFT_SRA);

        break;

    case 2 | 4:

        tcg_out_arithi(s, datalo, n, 0, SHIFT_SRA);

        break;

    case 3:

        if (TCG_TARGET_REG_BITS == 32) {

            tcg_out_mov(s, TCG_TYPE_REG, datahi, n);

            tcg_out_mov(s, TCG_TYPE_REG, datalo, n + 1);

            break;

        }

        /* FALLTHRU */

    case 0:

    case 1:

    case 2:

    default:

        /* mov */

        tcg_out_mov(s, TCG_TYPE_REG, datalo, n);

        break;

    }

    *label_ptr[1] |= INSN_OFF19((unsigned long)s->code_ptr -

                                (unsigned long)label_ptr[1]);

#else

    addr_reg = args[addrlo_idx];

    if (TCG_TARGET_REG_BITS == 64 && TARGET_LONG_BITS == 32) {

        tcg_out_arithi(s, TCG_REG_T1, addr_reg, 0, SHIFT_SRL);

        addr_reg = TCG_REG_T1;

    }

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        int reg64 = (datalo < 16 ? datalo : TCG_REG_O0);

        tcg_out_ldst_rr(s, reg64, addr_reg,

                        (GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_G0),

                        qemu_ld_opc[sizeop]);

        tcg_out_arithi(s, datahi, reg64, 32, SHIFT_SRLX);

        if (reg64 != datalo) {

            tcg_out_mov(s, TCG_TYPE_I32, datalo, reg64);

        }

    } else {

        tcg_out_ldst_rr(s, datalo, addr_reg,

                        (GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_G0),

                        qemu_ld_opc[sizeop]);

    }

#endif /* CONFIG_SOFTMMU */

}

static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int sizeop)

{

    int addrlo_idx = 1, datalo, datahi, addr_reg;

#if defined(CONFIG_SOFTMMU)

    int memi_idx, memi, n, datafull;

    uint32_t *label_ptr;

#endif

    datahi = datalo = args[0];

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        datahi = args[1];

        addrlo_idx = 2;

    }

#if defined(CONFIG_SOFTMMU)

    memi_idx = addrlo_idx + 1 + (TARGET_LONG_BITS > TCG_TARGET_REG_BITS);

    memi = args[memi_idx];

    addr_reg = tcg_out_tlb_load(s, addrlo_idx, memi, sizeop, args,

                                offsetof(CPUTLBEntry, addr_write));

    datafull = datalo;

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        /* Reconstruct the full 64-bit value.  */

        tcg_out_arithi(s, TCG_REG_T1, datalo, 0, SHIFT_SRL);

        tcg_out_arithi(s, TCG_REG_O2, datahi, 32, SHIFT_SLLX);

        tcg_out_arith(s, TCG_REG_O2, TCG_REG_T1, TCG_REG_O2, ARITH_OR);

        datafull = TCG_REG_O2;

    }

    /* The fast path is exactly one insn.  Thus we can perform the entire

       TLB Hit in the (annulled) delay slot of the branch over TLB Miss.  */

    /* beq,a,pt %[xi]cc, label0 */

    label_ptr = (uint32_t *)s->code_ptr;

    tcg_out_bpcc0(s, COND_E, BPCC_A | BPCC_PT

                  | (TARGET_LONG_BITS == 64 ? BPCC_XCC : BPCC_ICC), 0);

    /* delay slot */

    tcg_out_ldst_rr(s, datafull, addr_reg, TCG_REG_O1, qemu_st_opc[sizeop]);

    /* TLB Miss.  */

    n = 0;

    tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[n++], TCG_AREG0);

    if (TARGET_LONG_BITS > TCG_TARGET_REG_BITS) {

        tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n++],

                    args[addrlo_idx + 1]);

    }

    tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n++],

                args[addrlo_idx]);

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n++], datahi);

    }

    tcg_out_mov(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n++], datalo);

    /* qemu_st_helper[s_bits](arg0, arg1, arg2) */

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

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

                         & 0x3fffffff));

    /* delay slot */

    tcg_out_movi(s, TCG_TYPE_REG, tcg_target_call_iarg_regs[n], memi);

    *label_ptr |= INSN_OFF19((unsigned long)s->code_ptr -

                             (unsigned long)label_ptr);

#else

    addr_reg = args[addrlo_idx];

    if (TCG_TARGET_REG_BITS == 64 && TARGET_LONG_BITS == 32) {

        tcg_out_arithi(s, TCG_REG_T1, addr_reg, 0, SHIFT_SRL);

        addr_reg = TCG_REG_T1;

    }

    if (TCG_TARGET_REG_BITS == 32 && sizeop == 3) {

        tcg_out_arithi(s, TCG_REG_T1, datalo, 0, SHIFT_SRL);

        tcg_out_arithi(s, TCG_REG_O2, datahi, 32, SHIFT_SLLX);

        tcg_out_arith(s, TCG_REG_O2, TCG_REG_T1, TCG_REG_O2, ARITH_OR);

        datalo = TCG_REG_O2;

    }

    tcg_out_ldst_rr(s, datalo, addr_reg,

                    (GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_G0),

                    qemu_st_opc[sizeop]);

#endif /* CONFIG_SOFTMMU */

}

static inline void tcg_out_op(TCGContext *s, TCGOpcode 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 */

            uint32_t old_insn = *(uint32_t *)s->code_ptr;

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

            /* Make sure to preserve links during retranslation.  */

            tcg_out32(s, CALL | (old_insn & ~INSN_OP(-1)));

        } else {

            /* indirect jump method */

            tcg_out_ld_ptr(s, TCG_REG_T1,

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

            tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_T1) |

                      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));

        } else {

            tcg_out_ld_ptr(s, TCG_REG_T1,

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

            tcg_out32(s, JMPL | INSN_RD(TCG_REG_O7) | INSN_RS1(TCG_REG_T1) |

                      INSN_RS2(TCG_REG_G0));

        }

        /* delay slot */

        tcg_out_nop(s);

        break;

    case INDEX_op_br:

        tcg_out_bpcc(s, COND_A, BPCC_PT, 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 TCG_TARGET_REG_BITS == 64

#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 TCG_TARGET_REG_BITS == 64

    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 TCG_TARGET_REG_BITS == 64

    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_arith;

    OP_32_64(sub):

        c = ARITH_SUB;

        goto gen_arith;

    OP_32_64(and):

        c = ARITH_AND;

        goto gen_arith;

    OP_32_64(andc):

        c = ARITH_ANDN;

        goto gen_arith;

    OP_32_64(or):

        c = ARITH_OR;

        goto gen_arith;

    OP_32_64(orc):

        c = ARITH_ORN;

        goto gen_arith;

    OP_32_64(xor):

        c = ARITH_XOR;

        goto gen_arith;

    case INDEX_op_shl_i32:

        c = SHIFT_SLL;

    do_shift32:

        /* Limit immediate shift count lest we create an illegal insn.  */

        tcg_out_arithc(s, args[0], args[1], args[2] & 31, const_args[2], c);

        break;

    case INDEX_op_shr_i32:

        c = SHIFT_SRL;

        goto do_shift32;

    case INDEX_op_sar_i32:

        c = SHIFT_SRA;

        goto do_shift32;

    case INDEX_op_mul_i32:

        c = ARITH_UMUL;

        goto gen_arith;

    OP_32_64(neg):

        c = ARITH_SUB;

        goto gen_arith1;

    OP_32_64(not):

        c = ARITH_ORN;

        goto gen_arith1;

    case INDEX_op_div_i32:

        tcg_out_div32(s, args[0], args[1], args[2], const_args[2], 0);

        break;

    case INDEX_op_divu_i32:

        tcg_out_div32(s, args[0], args[1], args[2], const_args[2], 1);

        break;

    case INDEX_op_rem_i32:

    case INDEX_op_remu_i32:

        tcg_out_div32(s, TCG_REG_T1, args[1], args[2], const_args[2],

                      opc == INDEX_op_remu_i32);

        tcg_out_arithc(s, TCG_REG_T1, TCG_REG_T1, args[2], const_args[2],

                       ARITH_UMUL);

        tcg_out_arith(s, args[0], args[1], TCG_REG_T1, ARITH_SUB);

        break;

    case INDEX_op_brcond_i32:

        tcg_out_brcond_i32(s, args[2], args[0], args[1], const_args[1],

                           args[3]);

        break;

    case INDEX_op_setcond_i32:

        tcg_out_setcond_i32(s, args[3], args[0], args[1],

                            args[2], const_args[2]);

        break;

    case INDEX_op_movcond_i32:

        tcg_out_movcond_i32(s, args[5], args[0], args[1],

                            args[2], const_args[2], args[3], const_args[3]);

        break;

#if TCG_TARGET_REG_BITS == 32