Archipelago » qemu

/*

 *  Host code generation

 *

 *  Copyright (c) 2003 Fabrice Bellard

 *

 * 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 <stdarg.h>

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <inttypes.h>

#include "config.h"

#define NO_CPU_IO_DEFS

#include "cpu.h"

#include "exec-all.h"

#include "disas.h"

#include "tcg.h"

/* code generation context */

TCGContext tcg_ctx;

uint16_t gen_opc_buf[OPC_BUF_SIZE];

TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];

target_ulong gen_opc_pc[OPC_BUF_SIZE];

uint8_t gen_opc_instr_start[OPC_BUF_SIZE];

#if defined(TARGET_I386)

uint8_t gen_opc_cc_op[OPC_BUF_SIZE];

#elif defined(TARGET_SPARC)

target_ulong gen_opc_npc[OPC_BUF_SIZE];

target_ulong gen_opc_jump_pc[2];

#elif defined(TARGET_MIPS) || defined(TARGET_SH4)

uint32_t gen_opc_hflags[OPC_BUF_SIZE];

#endif

int code_copy_enabled = 1;

#ifdef CONFIG_PROFILER

int64_t dyngen_tb_count1;

int64_t dyngen_tb_count;

int64_t dyngen_op_count;

int64_t dyngen_old_op_count;

int64_t dyngen_tcg_del_op_count;

int dyngen_op_count_max;

int64_t dyngen_code_in_len;

int64_t dyngen_code_out_len;

int64_t dyngen_interm_time;

int64_t dyngen_code_time;

int64_t dyngen_restore_count;

int64_t dyngen_restore_time;

#endif

/* XXX: suppress that */

unsigned long code_gen_max_block_size(void)

{

    static unsigned long max;

    if (max == 0) {

#define DEF(s, n, copy_size) max = copy_size > max? copy_size : max;

#include "tcg-opc.h"

#undef DEF

        max *= OPC_MAX_SIZE;

    }

    return max;

}

void cpu_gen_init(void)

{

    tcg_context_init(&tcg_ctx); 

    tcg_set_frame(&tcg_ctx, TCG_AREG0, offsetof(CPUState, temp_buf),

                  128 * sizeof(long));

}

/* return non zero if the very first instruction is invalid so that

   the virtual CPU can trigger an exception.

   '*gen_code_size_ptr' contains the size of the generated code (host

   code).

*/

int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)

{

    TCGContext *s = &tcg_ctx;

    uint8_t *gen_code_buf;

    int gen_code_size;

#ifdef CONFIG_PROFILER

    int64_t ti;

#endif

#ifdef CONFIG_PROFILER

    dyngen_tb_count1++; /* includes aborted translations because of

                           exceptions */

    ti = profile_getclock();

#endif

    tcg_func_start(s);

    if (gen_intermediate_code(env, tb) < 0)

        return -1;

    /* generate machine code */

    gen_code_buf = tb->tc_ptr;

    tb->tb_next_offset[0] = 0xffff;

    tb->tb_next_offset[1] = 0xffff;

    s->tb_next_offset = tb->tb_next_offset;

#ifdef USE_DIRECT_JUMP

    s->tb_jmp_offset = tb->tb_jmp_offset;

    s->tb_next = NULL;

    /* the following two entries are optional (only used for string ops) */

    /* XXX: not used ? */

    tb->tb_jmp_offset[2] = 0xffff;

    tb->tb_jmp_offset[3] = 0xffff;

#else

    s->tb_jmp_offset = NULL;

    s->tb_next = tb->tb_next;

#endif

#ifdef CONFIG_PROFILER

    dyngen_tb_count++;

    dyngen_interm_time += profile_getclock() - ti;

    dyngen_code_time -= profile_getclock();

#endif

    gen_code_size = dyngen_code(s, gen_code_buf);

    *gen_code_size_ptr = gen_code_size;

#ifdef CONFIG_PROFILER

    dyngen_code_time += profile_getclock();

    dyngen_code_in_len += tb->size;

    dyngen_code_out_len += gen_code_size;

#endif

#ifdef DEBUG_DISAS

    if (loglevel & CPU_LOG_TB_OUT_ASM) {

        fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);

        disas(logfile, tb->tc_ptr, *gen_code_size_ptr);

        fprintf(logfile, "\n");

        fflush(logfile);

    }

#endif

    return 0;

}

/* The cpu state corresponding to 'searched_pc' is restored.

 */

int cpu_restore_state(TranslationBlock *tb,

                      CPUState *env, unsigned long searched_pc,

                      void *puc)

{

    TCGContext *s = &tcg_ctx;

    int j;

    unsigned long tc_ptr;

#ifdef CONFIG_PROFILER

    int64_t ti;

#endif

#ifdef CONFIG_PROFILER

    ti = profile_getclock();

#endif

    tcg_func_start(s);

    if (gen_intermediate_code_pc(env, tb) < 0)

        return -1;

    /* find opc index corresponding to search_pc */

    tc_ptr = (unsigned long)tb->tc_ptr;

    if (searched_pc < tc_ptr)

        return -1;

    s->tb_next_offset = tb->tb_next_offset;

#ifdef USE_DIRECT_JUMP

    s->tb_jmp_offset = tb->tb_jmp_offset;

    s->tb_next = NULL;

#else

    s->tb_jmp_offset = NULL;

    s->tb_next = tb->tb_next;

#endif

    j = dyngen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr);

    if (j < 0)

        return -1;

    /* now find start of instruction before */

    while (gen_opc_instr_start[j] == 0)

        j--;

#if defined(TARGET_I386)

    {

        int cc_op;

#ifdef DEBUG_DISAS

        if (loglevel & CPU_LOG_TB_OP) {

            int i;

            fprintf(logfile, "RESTORE:\n");

            for(i=0;i<=j; i++) {

                if (gen_opc_instr_start[i]) {

                    fprintf(logfile, "0x%04x: " TARGET_FMT_lx "\n", i, gen_opc_pc[i]);

                }

            }

            fprintf(logfile, "spc=0x%08lx j=0x%x eip=" TARGET_FMT_lx " cs_base=%x\n",

                    searched_pc, j, gen_opc_pc[j] - tb->cs_base,

                    (uint32_t)tb->cs_base);

        }

#endif

        env->eip = gen_opc_pc[j] - tb->cs_base;

        cc_op = gen_opc_cc_op[j];

        if (cc_op != CC_OP_DYNAMIC)

            env->cc_op = cc_op;

    }

#elif defined(TARGET_ARM)

    env->regs[15] = gen_opc_pc[j];

#elif defined(TARGET_SPARC)

    {

        target_ulong npc;

        env->pc = gen_opc_pc[j];

        npc = gen_opc_npc[j];

        if (npc == 1) {

            /* dynamic NPC: already stored */

        } else if (npc == 2) {

            target_ulong t2 = (target_ulong)(unsigned long)puc;

            /* jump PC: use T2 and the jump targets of the translation */

            if (t2)

                env->npc = gen_opc_jump_pc[0];

            else

                env->npc = gen_opc_jump_pc[1];

        } else {

            env->npc = npc;

        }

    }

#elif defined(TARGET_PPC)

    {

        int type, c;

        /* for PPC, we need to look at the micro operation to get the

           access type */

        env->nip = gen_opc_pc[j];

        c = gen_opc_buf[j];

        switch(c) {

#if defined(CONFIG_USER_ONLY)

#define CASE3(op)\

        case INDEX_op_ ## op ## _raw

#else

#define CASE3(op)\

        case INDEX_op_ ## op ## _user:\

        case INDEX_op_ ## op ## _kernel:\

        case INDEX_op_ ## op ## _hypv

#endif

        CASE3(stfd):

        CASE3(stfs):

        CASE3(lfd):

        CASE3(lfs):

            type = ACCESS_FLOAT;

            break;

        CASE3(lwarx):

            type = ACCESS_RES;

            break;

        CASE3(stwcx):

            type = ACCESS_RES;

            break;

        CASE3(eciwx):

        CASE3(ecowx):

            type = ACCESS_EXT;

            break;

        default:

            type = ACCESS_INT;

            break;

        }

        env->access_type = type;

    }

#elif defined(TARGET_M68K)

    env->pc = gen_opc_pc[j];

#elif defined(TARGET_MIPS)

    env->PC[env->current_tc] = gen_opc_pc[j];

    env->hflags &= ~MIPS_HFLAG_BMASK;

    env->hflags |= gen_opc_hflags[j];

#elif defined(TARGET_ALPHA)

    env->pc = gen_opc_pc[j];

#elif defined(TARGET_SH4)

    env->pc = gen_opc_pc[j];

    env->flags = gen_opc_hflags[j];

#endif

#ifdef CONFIG_PROFILER

    dyngen_restore_time += profile_getclock() - ti;

    dyngen_restore_count++;

#endif

    return 0;

}