1 /* 2 * x86 condition code helpers 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA 19 */ 20 21 #include "cpu.h" 22 #include "helper.h" 23 24 const uint8_t parity_table[256] = { 25 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 26 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 27 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 28 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 29 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 30 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 31 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 32 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 33 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 34 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 35 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 36 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 37 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 38 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 39 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 40 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 41 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 42 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 43 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 44 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 45 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 46 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 47 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 48 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 49 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 50 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 51 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 52 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 53 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 54 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 55 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, 56 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, 57 }; 58 59 #define SHIFT 0 60 #include "cc_helper_template.h" 61 #undef SHIFT 62 63 #define SHIFT 1 64 #include "cc_helper_template.h" 65 #undef SHIFT 66 67 #define SHIFT 2 68 #include "cc_helper_template.h" 69 #undef SHIFT 70 71 #ifdef TARGET_X86_64 72 #define SHIFT 3 73 #include "cc_helper_template.h" 74 #undef SHIFT 75 #endif 76 77 static int compute_all_eflags(CPUX86State *env) 78 { 79 return CC_SRC; 80 } 81 82 static int compute_c_eflags(CPUX86State *env) 83 { 84 return CC_SRC & CC_C; 85 } 86 87 uint32_t helper_cc_compute_all(CPUX86State *env, int op) 88 { 89 switch (op) { 90 default: /* should never happen */ return 0; 91 92 case CC_OP_EFLAGS: return compute_all_eflags(env); 93 94 case CC_OP_MULB: return compute_all_mulb(env); 95 case CC_OP_MULW: return compute_all_mulw(env); 96 case CC_OP_MULL: return compute_all_mull(env); 97 98 case CC_OP_ADDB: return compute_all_addb(env); 99 case CC_OP_ADDW: return compute_all_addw(env); 100 case CC_OP_ADDL: return compute_all_addl(env); 101 102 case CC_OP_ADCB: return compute_all_adcb(env); 103 case CC_OP_ADCW: return compute_all_adcw(env); 104 case CC_OP_ADCL: return compute_all_adcl(env); 105 106 case CC_OP_SUBB: return compute_all_subb(env); 107 case CC_OP_SUBW: return compute_all_subw(env); 108 case CC_OP_SUBL: return compute_all_subl(env); 109 110 case CC_OP_SBBB: return compute_all_sbbb(env); 111 case CC_OP_SBBW: return compute_all_sbbw(env); 112 case CC_OP_SBBL: return compute_all_sbbl(env); 113 114 case CC_OP_LOGICB: return compute_all_logicb(env); 115 case CC_OP_LOGICW: return compute_all_logicw(env); 116 case CC_OP_LOGICL: return compute_all_logicl(env); 117 118 case CC_OP_INCB: return compute_all_incb(env); 119 case CC_OP_INCW: return compute_all_incw(env); 120 case CC_OP_INCL: return compute_all_incl(env); 121 122 case CC_OP_DECB: return compute_all_decb(env); 123 case CC_OP_DECW: return compute_all_decw(env); 124 case CC_OP_DECL: return compute_all_decl(env); 125 126 case CC_OP_SHLB: return compute_all_shlb(env); 127 case CC_OP_SHLW: return compute_all_shlw(env); 128 case CC_OP_SHLL: return compute_all_shll(env); 129 130 case CC_OP_SARB: return compute_all_sarb(env); 131 case CC_OP_SARW: return compute_all_sarw(env); 132 case CC_OP_SARL: return compute_all_sarl(env); 133 134 #ifdef TARGET_X86_64 135 case CC_OP_MULQ: return compute_all_mulq(env); 136 137 case CC_OP_ADDQ: return compute_all_addq(env); 138 139 case CC_OP_ADCQ: return compute_all_adcq(env); 140 141 case CC_OP_SUBQ: return compute_all_subq(env); 142 143 case CC_OP_SBBQ: return compute_all_sbbq(env); 144 145 case CC_OP_LOGICQ: return compute_all_logicq(env); 146 147 case CC_OP_INCQ: return compute_all_incq(env); 148 149 case CC_OP_DECQ: return compute_all_decq(env); 150 151 case CC_OP_SHLQ: return compute_all_shlq(env); 152 153 case CC_OP_SARQ: return compute_all_sarq(env); 154 #endif 155 } 156 } 157 158 uint32_t cpu_cc_compute_all(CPUArchState *env1, int op) 159 { 160 return helper_cc_compute_all(env1, op); 161 } 162 163 uint32_t helper_cc_compute_c(CPUX86State *env, int op) 164 { 165 switch (op) { 166 default: /* should never happen */ return 0; 167 168 case CC_OP_EFLAGS: return compute_c_eflags(env); 169 170 case CC_OP_MULB: return compute_c_mull(env); 171 case CC_OP_MULW: return compute_c_mull(env); 172 case CC_OP_MULL: return compute_c_mull(env); 173 174 case CC_OP_ADDB: return compute_c_addb(env); 175 case CC_OP_ADDW: return compute_c_addw(env); 176 case CC_OP_ADDL: return compute_c_addl(env); 177 178 case CC_OP_ADCB: return compute_c_adcb(env); 179 case CC_OP_ADCW: return compute_c_adcw(env); 180 case CC_OP_ADCL: return compute_c_adcl(env); 181 182 case CC_OP_SUBB: return compute_c_subb(env); 183 case CC_OP_SUBW: return compute_c_subw(env); 184 case CC_OP_SUBL: return compute_c_subl(env); 185 186 case CC_OP_SBBB: return compute_c_sbbb(env); 187 case CC_OP_SBBW: return compute_c_sbbw(env); 188 case CC_OP_SBBL: return compute_c_sbbl(env); 189 190 case CC_OP_LOGICB: return compute_c_logicb(env); 191 case CC_OP_LOGICW: return compute_c_logicw(env); 192 case CC_OP_LOGICL: return compute_c_logicl(env); 193 194 case CC_OP_INCB: return compute_c_incl(env); 195 case CC_OP_INCW: return compute_c_incl(env); 196 case CC_OP_INCL: return compute_c_incl(env); 197 198 case CC_OP_DECB: return compute_c_incl(env); 199 case CC_OP_DECW: return compute_c_incl(env); 200 case CC_OP_DECL: return compute_c_incl(env); 201 202 case CC_OP_SHLB: return compute_c_shlb(env); 203 case CC_OP_SHLW: return compute_c_shlw(env); 204 case CC_OP_SHLL: return compute_c_shll(env); 205 206 case CC_OP_SARB: return compute_c_sarl(env); 207 case CC_OP_SARW: return compute_c_sarl(env); 208 case CC_OP_SARL: return compute_c_sarl(env); 209 210 #ifdef TARGET_X86_64 211 case CC_OP_MULQ: return compute_c_mull(env); 212 213 case CC_OP_ADDQ: return compute_c_addq(env); 214 215 case CC_OP_ADCQ: return compute_c_adcq(env); 216 217 case CC_OP_SUBQ: return compute_c_subq(env); 218 219 case CC_OP_SBBQ: return compute_c_sbbq(env); 220 221 case CC_OP_LOGICQ: return compute_c_logicq(env); 222 223 case CC_OP_INCQ: return compute_c_incl(env); 224 225 case CC_OP_DECQ: return compute_c_incl(env); 226 227 case CC_OP_SHLQ: return compute_c_shlq(env); 228 229 case CC_OP_SARQ: return compute_c_sarl(env); 230 #endif 231 } 232 } 233 234 void helper_write_eflags(CPUX86State *env, 235 target_ulong t0, uint32_t update_mask) 236 { 237 cpu_load_eflags(env, t0, update_mask); 238 } 239 240 target_ulong helper_read_eflags(CPUX86State *env) 241 { 242 uint32_t eflags; 243 eflags = helper_cc_compute_all(env, CC_OP); 244 eflags |= (DF & DF_MASK); 245 eflags |= env->eflags & ~(VM_MASK | RF_MASK); 246 return eflags; 247 } 248 249 void helper_clts(CPUX86State *env) 250 { 251 env->cr[0] &= ~CR0_TS_MASK; 252 env->hflags &= ~HF_TS_MASK; 253 } 254 255 void helper_reset_rf(CPUX86State *env) 256 { 257 env->eflags &= ~RF_MASK; 258 } 259 260 void helper_cli(CPUX86State *env) 261 { 262 env->eflags &= ~IF_MASK; 263 } 264 265 void helper_sti(CPUX86State *env) 266 { 267 env->eflags |= IF_MASK; 268 } 269 270 void helper_set_inhibit_irq(CPUX86State *env) 271 { 272 env->hflags |= HF_INHIBIT_IRQ_MASK; 273 } 274 275 void helper_reset_inhibit_irq(CPUX86State *env) 276 { 277 env->hflags &= ~HF_INHIBIT_IRQ_MASK; 278 } 279
