Archipelago » qemu

/*

 *  MIPS emulation micro-operations for qemu.

 * 

 *  Copyright (c) 2004-2005 Jocelyn Mayer

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#include "config.h"

#include "exec.h"

#ifndef CALL_FROM_TB0

#define CALL_FROM_TB0(func) func();

#endif

#ifndef CALL_FROM_TB1

#define CALL_FROM_TB1(func, arg0) func(arg0);

#endif

#ifndef CALL_FROM_TB1_CONST16

#define CALL_FROM_TB1_CONST16(func, arg0) CALL_FROM_TB1(func, arg0);

#endif

#ifndef CALL_FROM_TB2

#define CALL_FROM_TB2(func, arg0, arg1) func(arg0, arg1);

#endif

#ifndef CALL_FROM_TB2_CONST16

#define CALL_FROM_TB2_CONST16(func, arg0, arg1)     \

CALL_FROM_TB2(func, arg0, arg1);

#endif

#ifndef CALL_FROM_TB3

#define CALL_FROM_TB3(func, arg0, arg1, arg2) func(arg0, arg1, arg2);

#endif

#ifndef CALL_FROM_TB4

#define CALL_FROM_TB4(func, arg0, arg1, arg2, arg3) \

        func(arg0, arg1, arg2, arg3);

#endif

#define REG 1

#include "op_template.c"

#undef REG

#define REG 2

#include "op_template.c"

#undef REG

#define REG 3

#include "op_template.c"

#undef REG

#define REG 4

#include "op_template.c"

#undef REG

#define REG 5

#include "op_template.c"

#undef REG

#define REG 6

#include "op_template.c"

#undef REG

#define REG 7

#include "op_template.c"

#undef REG

#define REG 8

#include "op_template.c"

#undef REG

#define REG 9

#include "op_template.c"

#undef REG

#define REG 10

#include "op_template.c"

#undef REG

#define REG 11

#include "op_template.c"

#undef REG

#define REG 12

#include "op_template.c"

#undef REG

#define REG 13

#include "op_template.c"

#undef REG

#define REG 14

#include "op_template.c"

#undef REG

#define REG 15

#include "op_template.c"

#undef REG

#define REG 16

#include "op_template.c"

#undef REG

#define REG 17

#include "op_template.c"

#undef REG

#define REG 18

#include "op_template.c"

#undef REG

#define REG 19

#include "op_template.c"

#undef REG

#define REG 20

#include "op_template.c"

#undef REG

#define REG 21

#include "op_template.c"

#undef REG

#define REG 22

#include "op_template.c"

#undef REG

#define REG 23

#include "op_template.c"

#undef REG

#define REG 24

#include "op_template.c"

#undef REG

#define REG 25

#include "op_template.c"

#undef REG

#define REG 26

#include "op_template.c"

#undef REG

#define REG 27

#include "op_template.c"

#undef REG

#define REG 28

#include "op_template.c"

#undef REG

#define REG 29

#include "op_template.c"

#undef REG

#define REG 30

#include "op_template.c"

#undef REG

#define REG 31

#include "op_template.c"

#undef REG

#define TN T0

#include "op_template.c"

#undef TN

#define TN T1

#include "op_template.c"

#undef TN

#define TN T2

#include "op_template.c"

#undef TN

void op_dup_T0 (void)

{

    T2 = T0;

    RETURN();

}

void op_load_HI (void)

{

    T0 = env->HI;

    RETURN();

}

void op_store_HI (void)

{

    env->HI = T0;

    RETURN();

}

void op_load_LO (void)

{

    T0 = env->LO;

    RETURN();

}

void op_store_LO (void)

{

    env->LO = T0;

    RETURN();

}

/* Load and store */

#define MEMSUFFIX _raw

#include "op_mem.c"

#undef MEMSUFFIX

#if !defined(CONFIG_USER_ONLY)

#define MEMSUFFIX _user

#include "op_mem.c"

#undef MEMSUFFIX

#define MEMSUFFIX _kernel

#include "op_mem.c"

#undef MEMSUFFIX

#endif

/* Arithmetic */

void op_add (void)

{

    T0 += T1;

    RETURN();

}

void op_addo (void)

{

    target_ulong tmp;

    tmp = T0;

    T0 += T1;

    if ((T0 >> 31) ^ (T1 >> 31) ^ (tmp >> 31)) {

        CALL_FROM_TB1(do_raise_exception, EXCP_OVERFLOW);

    }

    RETURN();

}

void op_sub (void)

{

    T0 -= T1;

    RETURN();

}

void op_subo (void)

{

    target_ulong tmp;

    tmp = T0;

    T0 = (int32_t)T0 - (int32_t)T1;

    if (!((T0 >> 31) ^ (T1 >> 31) ^ (tmp >> 31))) {

        CALL_FROM_TB1(do_raise_exception, EXCP_OVERFLOW);

    }

    RETURN();

}

void op_mul (void)

{

    T0 = (int32_t)T0 * (int32_t)T1;

    RETURN();

}

void op_div (void)

{

    if (T1 != 0) {

        env->LO = (int32_t)T0 / (int32_t)T1;

        env->HI = (int32_t)T0 % (int32_t)T1;

    }

    RETURN();

}

void op_divu (void)

{

    if (T1 != 0) {

        env->LO = T0 / T1;

        env->HI = T0 % T1;

    }

    RETURN();

}

/* Logical */

void op_and (void)

{

    T0 &= T1;

    RETURN();

}

void op_nor (void)

{

    T0 = ~(T0 | T1);

    RETURN();

}

void op_or (void)

{

    T0 |= T1;

    RETURN();

}

void op_xor (void)

{

    T0 ^= T1;

    RETURN();

}

void op_sll (void)

{

    T0 = T0 << T1;

    RETURN();

}

void op_sra (void)

{

    T0 = (int32_t)T0 >> T1;

    RETURN();

}

void op_srl (void)

{

    T0 = T0 >> T1;

    RETURN();

}

void op_sllv (void)

{

    T0 = T1 << (T0 & 0x1F);

    RETURN();

}

void op_srav (void)

{

    T0 = (int32_t)T1 >> (T0 & 0x1F);

    RETURN();

}

void op_srlv (void)

{

    T0 = T1 >> (T0 & 0x1F);

    RETURN();

}

void op_clo (void)

{

    int n;

    if (T0 == (target_ulong)-1) {

        T0 = 32;

    } else {

        for (n = 0; n < 32; n++) {

            if (!(T0 & (1 << 31)))

                break;

            T0 = T0 << 1;

        }

        T0 = n;

    }

    RETURN();

}

void op_clz (void)

{

    int n;

    if (T0 == 0) {

        T0 = 32;

    } else {

        for (n = 0; n < 32; n++) {

            if (T0 & (1 << 31))

                break;

            T0 = T0 << 1;

        }

        T0 = n;

    }

    RETURN();

}

/* 64 bits arithmetic */

#if (HOST_LONG_BITS == 64)

static inline uint64_t get_HILO (void)

{

    return ((uint64_t)env->HI << 32) | (uint64_t)env->LO;

}

static inline void set_HILO (uint64_t HILO)

{

    env->LO = HILO & 0xFFFFFFFF;

    env->HI = HILO >> 32;

}

void op_mult (void)

{

    set_HILO((int64_t)T0 * (int64_t)T1);

    RETURN();

}

void op_multu (void)

{

    set_HILO((uint64_t)T0 * (uint64_t)T1);

    RETURN();

}

void op_madd (void)

{

    int64_t tmp;

    tmp = ((int64_t)T0 * (int64_t)T1);

    set_HILO((int64_t)get_HILO() + tmp);

    RETURN();

}

void op_maddu (void)

{

    uint64_t tmp;

    tmp = ((uint64_t)T0 * (uint64_t)T1);

    set_HILO(get_HILO() + tmp);

    RETURN();

}

void op_msub (void)

{

    int64_t tmp;

    tmp = ((int64_t)T0 * (int64_t)T1);

    set_HILO((int64_t)get_HILO() - tmp);

    RETURN();

}

void op_msubu (void)

{

    uint64_t tmp;

    tmp = ((uint64_t)T0 * (uint64_t)T1);

    set_HILO(get_HILO() - tmp);

    RETURN();

}

#else

void op_mult (void)

{

    CALL_FROM_TB0(do_mult);

    RETURN();

}

void op_multu (void)

{

    CALL_FROM_TB0(do_multu);

    RETURN();

}

void op_madd (void)

{

    CALL_FROM_TB0(do_madd);

    RETURN();

}

void op_maddu (void)

{

    CALL_FROM_TB0(do_maddu);

    RETURN();

}

void op_msub (void)

{

    CALL_FROM_TB0(do_msub);

    RETURN();

}

void op_msubu (void)

{

    CALL_FROM_TB0(do_msubu);

    RETURN();

}

#endif

/* Conditional moves */

void op_movn (void)

{

    if (T1 != 0)

        env->gpr[PARAM1] = T0;

    RETURN();

}

void op_movz (void)

{

    if (T1 == 0)

        env->gpr[PARAM1] = T0;

    RETURN();

}

/* Tests */

#define OP_COND(name, cond) \

void glue(op_, name) (void) \

{                           \

    if (cond) {             \

        T0 = 1;             \

    } else {                \

        T0 = 0;             \

    }                       \

    RETURN();               \

}

OP_COND(eq, T0 == T1);

OP_COND(ne, T0 != T1);

OP_COND(ge, (int32_t)T0 >= (int32_t)T1);

OP_COND(geu, T0 >= T1);

OP_COND(lt, (int32_t)T0 < (int32_t)T1);

OP_COND(ltu, T0 < T1);

OP_COND(gez, (int32_t)T0 >= 0);

OP_COND(gtz, (int32_t)T0 > 0);

OP_COND(lez, (int32_t)T0 <= 0);

OP_COND(ltz, (int32_t)T0 < 0);

/* Branchs */

//#undef USE_DIRECT_JUMP

#define EIP env->PC

/* Branch to register */

void op_save_breg_target (void)

{

    env->btarget = T2;

}

void op_restore_breg_target (void)

{

    T2 = env->btarget;

}

void op_breg (void)

{

    env->PC = T2;

    RETURN();

}

/* Unconditional branch */

void op_branch (void)

{

    JUMP_TB(branch, PARAM1, 0, PARAM2);

    RETURN();

}

void op_save_btarget (void)

{

    env->btarget = PARAM1;

    RETURN();

}

/* Conditional branch */

void op_set_bcond (void)

{

    T2 = T0;

    RETURN();

}

void op_save_bcond (void)

{

    env->bcond = T2;

    RETURN();

}

void op_restore_bcond (void)

{

    T2 = env->bcond;

    RETURN();

}

void op_bcond (void)

{

    if (T2) {

        JUMP_TB(bcond, PARAM1, 0, PARAM2);

    } else {

        JUMP_TB(bcond, PARAM1, 1, PARAM3);

    }

    RETURN();

}

/* Likely branch (used to skip the delay slot) */

void op_blikely (void)

{

    /* If the test is false, skip the delay slot */

    if (T2 == 0) {

        env->hflags = PARAM3;

        JUMP_TB(blikely, PARAM1, 1, PARAM2);

    }

    RETURN();

}

/* CP0 functions */

void op_mfc0 (void)

{

    CALL_FROM_TB2(do_mfc0, PARAM1, PARAM2);

    RETURN();

}

void op_mtc0 (void)

{

    CALL_FROM_TB2(do_mtc0, PARAM1, PARAM2);

    RETURN();

}

#if defined(MIPS_USES_R4K_TLB)

void op_tlbwi (void)

{

    CALL_FROM_TB0(do_tlbwi);

    RETURN();

}

void op_tlbwr (void)

{

    CALL_FROM_TB0(do_tlbwr);

    RETURN();

}

void op_tlbp (void)

{

    CALL_FROM_TB0(do_tlbp);

    RETURN();

}

void op_tlbr (void)

{

    CALL_FROM_TB0(do_tlbr);

    RETURN();

}

#endif

/* Specials */

void op_pmon (void)

{

    CALL_FROM_TB1(do_pmon, PARAM1);

}

void op_trap (void)

{

    if (T0) {

        CALL_FROM_TB1(do_raise_exception, EXCP_TRAP);

    }

    RETURN();

}

void op_set_lladdr (void)

{

    env->CP0_LLAddr = T2;

}

void debug_eret (void);

void op_eret (void)

{

    CALL_FROM_TB0(debug_eret);

    if (env->hflags & MIPS_HFLAG_ERL) {

        env->PC = env->CP0_ErrorEPC;

        env->hflags &= ~MIPS_HFLAG_ERL;

    } else {

        env->PC = env->CP0_EPC;

        env->hflags &= ~MIPS_HFLAG_EXL;

    }

    env->CP0_LLAddr = 1;

}

void op_deret (void)

{

    CALL_FROM_TB0(debug_eret);

    env->PC = env->CP0_DEPC;

}

void op_save_state (void)

{

    env->hflags = PARAM1;

    RETURN();

}

void op_save_pc (void)

{

    env->PC = PARAM1;

    RETURN();

}

void op_raise_exception (void)

{

    CALL_FROM_TB1(do_raise_exception, PARAM1);

    RETURN();

}

void op_raise_exception_err (void)

{

    CALL_FROM_TB2(do_raise_exception_err, PARAM1, PARAM2);

    RETURN();

}

void op_exit_tb (void)

{

    EXIT_TB();

}