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95b010094c
qemu/translate-all.c
pbrook a208e54a2f TCG op size estimation fix. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4154 c046a42c-6fe2-441c-8c8c-71466251a162
2008-03-31 17:07:36 +00:00

300 lines
7.9 KiB
C
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/*
* 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) {
max = TCG_MAX_OP_SIZE;
#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];
#elif defined(TARGET_CRIS)
env->pregs[PR_ERP] = gen_opc_pc[j];
#endif
#ifdef CONFIG_PROFILER
dyngen_restore_time += profile_getclock() - ti;
dyngen_restore_count++;
#endif
return 0;
}
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