translate-all.c

   1 /*
   2  *  Host code generation
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25
  26 #include "config.h"
  27
  28 #define NO_CPU_IO_DEFS
  29 #include "cpu.h"
  30 #include "exec-all.h"
  31 #include "disas.h"
  32 #include "tcg.h"
  33
  34 /* code generation context */
  35 TCGContext tcg_ctx;
  36
  37 uint16_t gen_opc_buf[OPC_BUF_SIZE];
  38 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
  39
  40 target_ulong gen_opc_pc[OPC_BUF_SIZE];
  41 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
  42 #if defined(TARGET_I386)
  43 uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
  44 #elif defined(TARGET_SPARC)
  45 target_ulong gen_opc_npc[OPC_BUF_SIZE];
  46 target_ulong gen_opc_jump_pc[2];
  47 #elif defined(TARGET_HPPA)
  48 target_ulong gen_opc_npc[OPC_BUF_SIZE];
  49 #elif defined(TARGET_MIPS) || defined(TARGET_SH4)
  50 uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  51 #endif
  52
  53 int code_copy_enabled = 1;
  54
  55 #ifdef CONFIG_PROFILER
  56 int64_t dyngen_tb_count1;
  57 int64_t dyngen_tb_count;
  58 int64_t dyngen_op_count;
  59 int64_t dyngen_old_op_count;
  60 int64_t dyngen_tcg_del_op_count;
  61 int dyngen_op_count_max;
  62 int64_t dyngen_code_in_len;
  63 int64_t dyngen_code_out_len;
  64 int64_t dyngen_interm_time;
  65 int64_t dyngen_code_time;
  66 int64_t dyngen_restore_count;
  67 int64_t dyngen_restore_time;
  68 #endif
  69
  70 /* XXX: suppress that */
  71 unsigned long code_gen_max_block_size(void)
  72 {
  73     static unsigned long max;
  74
  75     if (max == 0) {
  76         max = TCG_MAX_OP_SIZE;
  77 #define DEF(s, n, copy_size) max = copy_size > max? copy_size : max;
  78 #include "tcg-opc.h"
  79 #undef DEF
  80         max *= OPC_MAX_SIZE;
  81     }
  82
  83     return max;
  84 }
  85
  86 void cpu_gen_init(void)
  87 {
  88     tcg_context_init(&tcg_ctx);
  89     tcg_set_frame(&tcg_ctx, TCG_AREG0, offsetof(CPUState, temp_buf),
  90                   CPU_TEMP_BUF_NLONGS * sizeof(long));
  91 }
  92
  93 /* return non zero if the very first instruction is invalid so that
  94    the virtual CPU can trigger an exception.
  95
  96    '*gen_code_size_ptr' contains the size of the generated code (host
  97    code).
  98 */
  99 int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)
 100 {
 101     TCGContext *s = &tcg_ctx;
 102     uint8_t *gen_code_buf;
 103     int gen_code_size;
 104 #ifdef CONFIG_PROFILER
 105     int64_t ti;
 106 #endif
 107
 108 #ifdef CONFIG_PROFILER
 109     dyngen_tb_count1++; /* includes aborted translations because of
 110                            exceptions */
 111     ti = profile_getclock();
 112 #endif
 113     tcg_func_start(s);
 114
 115     if (gen_intermediate_code(env, tb) < 0)
 116         return -1;
 117
 118     /* generate machine code */
 119     gen_code_buf = tb->tc_ptr;
 120     tb->tb_next_offset[0] = 0xffff;
 121     tb->tb_next_offset[1] = 0xffff;
 122     s->tb_next_offset = tb->tb_next_offset;
 123 #ifdef USE_DIRECT_JUMP
 124     s->tb_jmp_offset = tb->tb_jmp_offset;
 125     s->tb_next = NULL;
 126     /* the following two entries are optional (only used for string ops) */
 127     /* XXX: not used ? */
 128     tb->tb_jmp_offset[2] = 0xffff;
 129     tb->tb_jmp_offset[3] = 0xffff;
 130 #else
 131     s->tb_jmp_offset = NULL;
 132     s->tb_next = tb->tb_next;
 133 #endif
 134
 135 #ifdef CONFIG_PROFILER
 136     dyngen_tb_count++;
 137     dyngen_interm_time += profile_getclock() - ti;
 138     dyngen_code_time -= profile_getclock();
 139 #endif
 140     gen_code_size = dyngen_code(s, gen_code_buf);
 141     *gen_code_size_ptr = gen_code_size;
 142 #ifdef CONFIG_PROFILER
 143     dyngen_code_time += profile_getclock();
 144     dyngen_code_in_len += tb->size;
 145     dyngen_code_out_len += gen_code_size;
 146 #endif
 147
 148 #ifdef DEBUG_DISAS
 149     if (loglevel & CPU_LOG_TB_OUT_ASM) {
 150         fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
 151         disas(logfile, tb->tc_ptr, *gen_code_size_ptr);
 152         fprintf(logfile, "\n");
 153         fflush(logfile);
 154     }
 155 #endif
 156     return 0;
 157 }
 158
 159 /* The cpu state corresponding to 'searched_pc' is restored.
 160  */
 161 int cpu_restore_state(TranslationBlock *tb,
 162                       CPUState *env, unsigned long searched_pc,
 163                       void *puc)
 164 {
 165     TCGContext *s = &tcg_ctx;
 166     int j;
 167     unsigned long tc_ptr;
 168 #ifdef CONFIG_PROFILER
 169     int64_t ti;
 170 #endif
 171
 172 #ifdef CONFIG_PROFILER
 173     ti = profile_getclock();
 174 #endif
 175     tcg_func_start(s);
 176
 177     if (gen_intermediate_code_pc(env, tb) < 0)
 178         return -1;
 179
 180     /* find opc index corresponding to search_pc */
 181     tc_ptr = (unsigned long)tb->tc_ptr;
 182     if (searched_pc < tc_ptr)
 183         return -1;
 184
 185     s->tb_next_offset = tb->tb_next_offset;
 186 #ifdef USE_DIRECT_JUMP
 187     s->tb_jmp_offset = tb->tb_jmp_offset;
 188     s->tb_next = NULL;
 189 #else
 190     s->tb_jmp_offset = NULL;
 191     s->tb_next = tb->tb_next;
 192 #endif
 193     j = dyngen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr);
 194     if (j < 0)
 195         return -1;
 196     /* now find start of instruction before */
 197     while (gen_opc_instr_start[j] == 0)
 198         j--;
 199
 200     gen_pc_load(env, tb, searched_pc, j, puc);
 201
 202 #ifdef CONFIG_PROFILER
 203     dyngen_restore_time += profile_getclock() - ti;
 204     dyngen_restore_count++;
 205 #endif
 206     return 0;
 207 }