196 lines
5.1 KiB
C
196 lines
5.1 KiB
C
/*
|
|
* 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];
|
|
uint16_t gen_opc_icount[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
|
|
|
|
/* 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),
|
|
CPU_TEMP_BUF_NLONGS * 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
|
|
s->tb_count1++; /* includes aborted translations because of
|
|
exceptions */
|
|
ti = profile_getclock();
|
|
#endif
|
|
tcg_func_start(s);
|
|
|
|
gen_intermediate_code(env, tb);
|
|
|
|
/* 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
|
|
s->tb_count++;
|
|
s->interm_time += profile_getclock() - ti;
|
|
s->code_time -= profile_getclock();
|
|
#endif
|
|
gen_code_size = dyngen_code(s, gen_code_buf);
|
|
*gen_code_size_ptr = gen_code_size;
|
|
#ifdef CONFIG_PROFILER
|
|
s->code_time += profile_getclock();
|
|
s->code_in_len += tb->size;
|
|
s->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);
|
|
|
|
gen_intermediate_code_pc(env, tb);
|
|
|
|
if (use_icount) {
|
|
/* Reset the cycle counter to the start of the block. */
|
|
env->icount_decr.u16.low += tb->icount;
|
|
/* Clear the IO flag. */
|
|
env->can_do_io = 0;
|
|
}
|
|
|
|
/* 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--;
|
|
env->icount_decr.u16.low -= gen_opc_icount[j];
|
|
|
|
gen_pc_load(env, tb, searched_pc, j, puc);
|
|
|
|
#ifdef CONFIG_PROFILER
|
|
s->restore_time += profile_getclock() - ti;
|
|
s->restore_count++;
|
|
#endif
|
|
return 0;
|
|
}
|