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_MIPS) || defined(TARGET_SH4)
  48 uint32_t gen_opc_hflags[OPC_BUF_SIZE];
  49 #endif
  50
  51 int code_copy_enabled = 1;
  52
  53 #ifdef CONFIG_PROFILER
  54 int64_t dyngen_tb_count1;
  55 int64_t dyngen_tb_count;
  56 int64_t dyngen_op_count;
  57 int64_t dyngen_old_op_count;
  58 int64_t dyngen_tcg_del_op_count;
  59 int dyngen_op_count_max;
  60 int64_t dyngen_code_in_len;
  61 int64_t dyngen_code_out_len;
  62 int64_t dyngen_interm_time;
  63 int64_t dyngen_code_time;
  64 int64_t dyngen_restore_count;
  65 int64_t dyngen_restore_time;
  66 #endif
  67
  68 /* XXX: suppress that */
  69 unsigned long code_gen_max_block_size(void)
  70 {
  71     static unsigned long max;
  72
  73     if (max == 0) {
  74         max = TCG_MAX_OP_SIZE;
  75 #define DEF(s, n, copy_size) max = copy_size > max? copy_size : max;
  76 #include "tcg-opc.h"
  77 #undef DEF
  78         max *= OPC_MAX_SIZE;
  79     }
  80
  81     return max;
  82 }
  83
  84 void cpu_gen_init(void)
  85 {
  86     tcg_context_init(&tcg_ctx);
  87     tcg_set_frame(&tcg_ctx, TCG_AREG0, offsetof(CPUState, temp_buf),
  88                   CPU_TEMP_BUF_NLONGS * sizeof(long));
  89 }
  90
  91 /* return non zero if the very first instruction is invalid so that
  92    the virtual CPU can trigger an exception.
  93
  94    '*gen_code_size_ptr' contains the size of the generated code (host
  95    code).
  96 */
  97 int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)
  98 {
  99     TCGContext *s = &tcg_ctx;
 100     uint8_t *gen_code_buf;
 101     int gen_code_size;
 102 #ifdef CONFIG_PROFILER
 103     int64_t ti;
 104 #endif
 105
 106 #ifdef CONFIG_PROFILER
 107     dyngen_tb_count1++; /* includes aborted translations because of
 108                            exceptions */
 109     ti = profile_getclock();
 110 #endif
 111     tcg_func_start(s);
 112
 113     if (gen_intermediate_code(env, tb) < 0)
 114         return -1;
 115
 116     /* generate machine code */
 117     gen_code_buf = tb->tc_ptr;
 118     tb->tb_next_offset[0] = 0xffff;
 119     tb->tb_next_offset[1] = 0xffff;
 120     s->tb_next_offset = tb->tb_next_offset;
 121 #ifdef USE_DIRECT_JUMP
 122     s->tb_jmp_offset = tb->tb_jmp_offset;
 123     s->tb_next = NULL;
 124     /* the following two entries are optional (only used for string ops) */
 125     /* XXX: not used ? */
 126     tb->tb_jmp_offset[2] = 0xffff;
 127     tb->tb_jmp_offset[3] = 0xffff;
 128 #else
 129     s->tb_jmp_offset = NULL;
 130     s->tb_next = tb->tb_next;
 131 #endif
 132
 133 #ifdef CONFIG_PROFILER
 134     dyngen_tb_count++;
 135     dyngen_interm_time += profile_getclock() - ti;
 136     dyngen_code_time -= profile_getclock();
 137 #endif
 138     gen_code_size = dyngen_code(s, gen_code_buf);
 139     *gen_code_size_ptr = gen_code_size;
 140 #ifdef CONFIG_PROFILER
 141     dyngen_code_time += profile_getclock();
 142     dyngen_code_in_len += tb->size;
 143     dyngen_code_out_len += gen_code_size;
 144 #endif
 145
 146 #ifdef DEBUG_DISAS
 147     if (loglevel & CPU_LOG_TB_OUT_ASM) {
 148         fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
 149         disas(logfile, tb->tc_ptr, *gen_code_size_ptr);
 150         fprintf(logfile, "\n");
 151         fflush(logfile);
 152     }
 153 #endif
 154     return 0;
 155 }
 156
 157 /* The cpu state corresponding to 'searched_pc' is restored.
 158  */
 159 int cpu_restore_state(TranslationBlock *tb,
 160                       CPUState *env, unsigned long searched_pc,
 161                       void *puc)
 162 {
 163     TCGContext *s = &tcg_ctx;
 164     int j;
 165     unsigned long tc_ptr;
 166 #ifdef CONFIG_PROFILER
 167     int64_t ti;
 168 #endif
 169
 170 #ifdef CONFIG_PROFILER
 171     ti = profile_getclock();
 172 #endif
 173     tcg_func_start(s);
 174
 175     if (gen_intermediate_code_pc(env, tb) < 0)
 176         return -1;
 177
 178     /* find opc index corresponding to search_pc */
 179     tc_ptr = (unsigned long)tb->tc_ptr;
 180     if (searched_pc < tc_ptr)
 181         return -1;
 182
 183     s->tb_next_offset = tb->tb_next_offset;
 184 #ifdef USE_DIRECT_JUMP
 185     s->tb_jmp_offset = tb->tb_jmp_offset;
 186     s->tb_next = NULL;
 187 #else
 188     s->tb_jmp_offset = NULL;
 189     s->tb_next = tb->tb_next;
 190 #endif
 191     j = dyngen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr);
 192     if (j < 0)
 193         return -1;
 194     /* now find start of instruction before */
 195     while (gen_opc_instr_start[j] == 0)
 196         j--;
 197
 198     gen_pc_load(env, tb, searched_pc, j, puc);
 199
 200 #ifdef CONFIG_PROFILER
 201     dyngen_restore_time += profile_getclock() - ti;
 202     dyngen_restore_count++;
 203 #endif
 204     return 0;
 205 }