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1 /* |
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2 * Host code generation |
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3 * |
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4 * Copyright (c) 2003 Fabrice Bellard |
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5 * |
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6 * This library is free software; you can redistribute it and/or |
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7 * modify it under the terms of the GNU Lesser General Public |
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8 * License as published by the Free Software Foundation; either |
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9 * version 2 of the License, or (at your option) any later version. |
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10 * |
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11 * This library is distributed in the hope that it will be useful, |
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 * Lesser General Public License for more details. |
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15 * |
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16 * You should have received a copy of the GNU Lesser General Public |
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17 * License along with this library; if not, write to the Free Software |
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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19 */ |
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20 #include <stdarg.h> |
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21 #include <stdlib.h> |
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22 #include <stdio.h> |
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23 #include <string.h> |
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24 #include <inttypes.h> |
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25 |
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26 #include "config.h" |
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27 |
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28 #define NO_CPU_IO_DEFS |
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29 #include "cpu.h" |
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30 #include "exec-all.h" |
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31 #include "disas.h" |
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32 #include "tcg.h" |
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33 |
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34 /* code generation context */ |
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35 TCGContext tcg_ctx; |
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36 |
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37 uint16_t gen_opc_buf[OPC_BUF_SIZE]; |
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38 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE]; |
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39 |
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40 target_ulong gen_opc_pc[OPC_BUF_SIZE]; |
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41 uint16_t gen_opc_icount[OPC_BUF_SIZE]; |
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42 uint8_t gen_opc_instr_start[OPC_BUF_SIZE]; |
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43 #if defined(TARGET_I386) |
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44 uint8_t gen_opc_cc_op[OPC_BUF_SIZE]; |
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45 #elif defined(TARGET_SPARC) |
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46 target_ulong gen_opc_npc[OPC_BUF_SIZE]; |
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47 target_ulong gen_opc_jump_pc[2]; |
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48 #elif defined(TARGET_MIPS) || defined(TARGET_SH4) |
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49 uint32_t gen_opc_hflags[OPC_BUF_SIZE]; |
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50 #endif |
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51 |
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52 /* XXX: suppress that */ |
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53 unsigned long code_gen_max_block_size(void) |
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54 { |
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55 static unsigned long max; |
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56 |
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57 if (max == 0) { |
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58 max = TCG_MAX_OP_SIZE; |
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59 #define DEF(s, n, copy_size) max = copy_size > max? copy_size : max; |
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60 #include "tcg-opc.h" |
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61 #undef DEF |
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62 max *= OPC_MAX_SIZE; |
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63 } |
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64 |
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65 return max; |
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66 } |
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67 |
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68 void cpu_gen_init(void) |
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69 { |
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70 tcg_context_init(&tcg_ctx); |
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71 tcg_set_frame(&tcg_ctx, TCG_AREG0, offsetof(CPUState, temp_buf), |
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72 CPU_TEMP_BUF_NLONGS * sizeof(long)); |
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73 } |
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74 |
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75 /* return non zero if the very first instruction is invalid so that |
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76 the virtual CPU can trigger an exception. |
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77 |
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78 '*gen_code_size_ptr' contains the size of the generated code (host |
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79 code). |
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80 */ |
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81 int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr) |
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82 { |
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83 TCGContext *s = &tcg_ctx; |
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84 uint8_t *gen_code_buf; |
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85 int gen_code_size; |
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86 #ifdef CONFIG_PROFILER |
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87 int64_t ti; |
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88 #endif |
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89 |
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90 #ifdef CONFIG_PROFILER |
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91 s->tb_count1++; /* includes aborted translations because of |
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92 exceptions */ |
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93 ti = profile_getclock(); |
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94 #endif |
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95 tcg_func_start(s); |
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96 |
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97 gen_intermediate_code(env, tb); |
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98 |
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99 /* generate machine code */ |
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100 gen_code_buf = tb->tc_ptr; |
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101 tb->tb_next_offset[0] = 0xffff; |
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102 tb->tb_next_offset[1] = 0xffff; |
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103 s->tb_next_offset = tb->tb_next_offset; |
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104 #ifdef USE_DIRECT_JUMP |
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105 s->tb_jmp_offset = tb->tb_jmp_offset; |
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106 s->tb_next = NULL; |
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107 /* the following two entries are optional (only used for string ops) */ |
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108 /* XXX: not used ? */ |
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109 tb->tb_jmp_offset[2] = 0xffff; |
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110 tb->tb_jmp_offset[3] = 0xffff; |
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111 #else |
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112 s->tb_jmp_offset = NULL; |
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113 s->tb_next = tb->tb_next; |
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114 #endif |
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115 |
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116 #ifdef CONFIG_PROFILER |
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117 s->tb_count++; |
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118 s->interm_time += profile_getclock() - ti; |
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119 s->code_time -= profile_getclock(); |
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120 #endif |
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121 gen_code_size = tcg_gen_code(s, gen_code_buf); |
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122 *gen_code_size_ptr = gen_code_size; |
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123 #ifdef CONFIG_PROFILER |
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124 s->code_time += profile_getclock(); |
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125 s->code_in_len += tb->size; |
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126 s->code_out_len += gen_code_size; |
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127 #endif |
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128 |
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129 #ifdef DEBUG_DISAS |
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130 if (loglevel & CPU_LOG_TB_OUT_ASM) { |
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131 fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr); |
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132 disas(logfile, tb->tc_ptr, *gen_code_size_ptr); |
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133 fprintf(logfile, "\n"); |
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134 fflush(logfile); |
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135 } |
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136 #endif |
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137 return 0; |
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138 } |
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139 |
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140 /* The cpu state corresponding to 'searched_pc' is restored. |
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141 */ |
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142 int cpu_restore_state(TranslationBlock *tb, |
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143 CPUState *env, unsigned long searched_pc, |
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144 void *puc) |
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145 { |
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146 TCGContext *s = &tcg_ctx; |
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147 int j; |
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148 unsigned long tc_ptr; |
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149 #ifdef CONFIG_PROFILER |
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150 int64_t ti; |
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151 #endif |
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152 |
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153 #ifdef CONFIG_PROFILER |
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154 ti = profile_getclock(); |
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155 #endif |
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156 tcg_func_start(s); |
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157 |
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158 gen_intermediate_code_pc(env, tb); |
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159 |
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160 if (use_icount) { |
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161 /* Reset the cycle counter to the start of the block. */ |
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162 env->icount_decr.u16.low += tb->icount; |
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163 /* Clear the IO flag. */ |
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164 env->can_do_io = 0; |
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165 } |
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166 |
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167 /* find opc index corresponding to search_pc */ |
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168 tc_ptr = (unsigned long)tb->tc_ptr; |
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169 if (searched_pc < tc_ptr) |
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170 return -1; |
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171 |
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172 s->tb_next_offset = tb->tb_next_offset; |
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173 #ifdef USE_DIRECT_JUMP |
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174 s->tb_jmp_offset = tb->tb_jmp_offset; |
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175 s->tb_next = NULL; |
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176 #else |
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177 s->tb_jmp_offset = NULL; |
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178 s->tb_next = tb->tb_next; |
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179 #endif |
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180 j = tcg_gen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr); |
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181 if (j < 0) |
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182 return -1; |
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183 /* now find start of instruction before */ |
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184 while (gen_opc_instr_start[j] == 0) |
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185 j--; |
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186 env->icount_decr.u16.low -= gen_opc_icount[j]; |
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187 |
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188 gen_pc_load(env, tb, searched_pc, j, puc); |
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189 |
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190 #ifdef CONFIG_PROFILER |
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191 s->restore_time += profile_getclock() - ti; |
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192 s->restore_count++; |
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193 #endif |
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194 return 0; |
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195 } |