sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- The JITter: translate ucode back to x86 code. ---*/ |
| 4 | /*--- vg_from_ucode.c ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 6 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 7 | /* |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 8 | This file is part of Valgrind, an extensible x86 protected-mode |
| 9 | emulator for monitoring program execution on x86-Unixes. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 10 | |
njn | 0e1b514 | 2003-04-15 14:58:06 +0000 | [diff] [blame] | 11 | Copyright (C) 2000-2003 Julian Seward |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 12 | jseward@acm.org |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 13 | |
| 14 | This program is free software; you can redistribute it and/or |
| 15 | modify it under the terms of the GNU General Public License as |
| 16 | published by the Free Software Foundation; either version 2 of the |
| 17 | License, or (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 27 | 02111-1307, USA. |
| 28 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 29 | The GNU General Public License is contained in the file COPYING. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 30 | */ |
| 31 | |
| 32 | #include "vg_include.h" |
| 33 | |
| 34 | |
| 35 | /*------------------------------------------------------------*/ |
| 36 | /*--- Renamings of frequently-used global functions. ---*/ |
| 37 | /*------------------------------------------------------------*/ |
| 38 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 39 | #define dis VG_(print_codegen) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 40 | |
| 41 | /*------------------------------------------------------------*/ |
| 42 | /*--- Instruction emission -- turning final uinstrs back ---*/ |
| 43 | /*--- into x86 code. ---*/ |
| 44 | /*------------------------------------------------------------*/ |
| 45 | |
| 46 | /* [2001-07-08 This comment is now somewhat out of date.] |
| 47 | |
| 48 | This is straightforward but for one thing: to facilitate generating |
| 49 | code in a single pass, we generate position-independent code. To |
| 50 | do this, calls and jmps to fixed addresses must specify the address |
| 51 | by first loading it into a register, and jump to/call that |
| 52 | register. Fortunately, the only jump to a literal is the jump back |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 53 | to vg_dispatch, and only %eax is live then, conveniently. UCode |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 54 | call insns may only have a register as target anyway, so there's no |
| 55 | need to do anything fancy for them. |
| 56 | |
| 57 | The emit_* routines constitute the lowest level of instruction |
| 58 | emission. They simply emit the sequence of bytes corresponding to |
| 59 | the relevant instruction, with no further ado. In particular there |
| 60 | is no checking about whether uses of byte registers makes sense, |
| 61 | nor whether shift insns have their first operand in %cl, etc. |
| 62 | |
| 63 | These issues are taken care of by the level above, the synth_* |
| 64 | routines. These detect impossible operand combinations and turn |
| 65 | them into sequences of legal instructions. Finally, emitUInstr is |
| 66 | phrased in terms of the synth_* abstraction layer. */ |
| 67 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 68 | /* Static state for the current basic block */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 69 | static UChar* emitted_code; |
| 70 | static Int emitted_code_used; |
| 71 | static Int emitted_code_size; |
| 72 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 73 | /* offset (in bytes into the basic block) */ |
| 74 | static UShort jumps[VG_MAX_JUMPS]; |
| 75 | static Int jumpidx; |
| 76 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 77 | static enum _eflags_state { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 78 | UPD_Simd, /* baseblock copy is up to date */ |
| 79 | UPD_Real, /* CPU copy is up to date */ |
| 80 | UPD_Both, /* both are current */ |
| 81 | } eflags_state; |
| 82 | |
| 83 | /* single site for resetting state */ |
| 84 | static void reset_state(void) |
| 85 | { |
| 86 | emitted_code_used = 0; |
| 87 | emitted_code_size = 500; /* reasonable initial size */ |
| 88 | emitted_code = VG_(arena_malloc)(VG_AR_JITTER, emitted_code_size); |
| 89 | jumpidx = 0; |
| 90 | eflags_state = UPD_Simd; |
| 91 | } |
| 92 | |
| 93 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 94 | /* Statistics about C functions called from generated code. */ |
| 95 | static UInt ccalls = 0; |
| 96 | static UInt ccall_reg_saves = 0; |
| 97 | static UInt ccall_args = 0; |
| 98 | static UInt ccall_arg_setup_instrs = 0; |
| 99 | static UInt ccall_stack_clears = 0; |
| 100 | static UInt ccall_retvals = 0; |
| 101 | static UInt ccall_retval_movs = 0; |
| 102 | |
| 103 | /* Statistics about frequency of each UInstr */ |
| 104 | typedef |
| 105 | struct { |
| 106 | UInt counts; |
| 107 | UInt size; |
| 108 | } Histogram; |
| 109 | |
| 110 | /* Automatically zeroed because it's static. */ |
| 111 | static Histogram histogram[100]; |
| 112 | |
| 113 | void VG_(print_ccall_stats)(void) |
| 114 | { |
| 115 | VG_(message)(Vg_DebugMsg, |
| 116 | " ccalls: %u C calls, %u%% saves+restores avoided" |
| 117 | " (%d bytes)", |
| 118 | ccalls, |
| 119 | 100-(UInt)(ccall_reg_saves/(double)(ccalls*3)*100), |
| 120 | ((ccalls*3) - ccall_reg_saves)*2); |
| 121 | VG_(message)(Vg_DebugMsg, |
| 122 | " %u args, avg 0.%d setup instrs each (%d bytes)", |
| 123 | ccall_args, |
| 124 | (UInt)(ccall_arg_setup_instrs/(double)ccall_args*100), |
| 125 | (ccall_args - ccall_arg_setup_instrs)*2); |
| 126 | VG_(message)(Vg_DebugMsg, |
| 127 | " %d%% clear the stack (%d bytes)", |
| 128 | (UInt)(ccall_stack_clears/(double)ccalls*100), |
| 129 | (ccalls - ccall_stack_clears)*3); |
| 130 | VG_(message)(Vg_DebugMsg, |
| 131 | " %u retvals, %u%% of reg-reg movs avoided (%d bytes)", |
| 132 | ccall_retvals, |
| 133 | ( ccall_retvals == 0 |
| 134 | ? 100 |
| 135 | : 100-(UInt)(ccall_retval_movs / |
| 136 | (double)ccall_retvals*100)), |
| 137 | (ccall_retvals-ccall_retval_movs)*2); |
| 138 | } |
| 139 | |
| 140 | void VG_(print_UInstr_histogram)(void) |
| 141 | { |
| 142 | Int i, j; |
| 143 | UInt total_counts = 0; |
| 144 | UInt total_size = 0; |
sewardj | 6c3769f | 2002-11-29 01:02:45 +0000 | [diff] [blame] | 145 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 146 | for (i = 0; i < 100; i++) { |
| 147 | total_counts += histogram[i].counts; |
| 148 | total_size += histogram[i].size; |
| 149 | } |
| 150 | |
| 151 | VG_(printf)("-- UInstr frequencies -----------\n"); |
| 152 | for (i = 0; i < 100; i++) { |
| 153 | if (0 != histogram[i].counts) { |
| 154 | |
| 155 | UInt count_pc = |
| 156 | (UInt)(histogram[i].counts/(double)total_counts*100 + 0.5); |
| 157 | UInt size_pc = |
| 158 | (UInt)(histogram[i].size /(double)total_size *100 + 0.5); |
| 159 | UInt avg_size = |
| 160 | (UInt)(histogram[i].size / (double)histogram[i].counts + 0.5); |
| 161 | |
| 162 | VG_(printf)("%-7s:%8u (%2u%%), avg %2dB (%2u%%) |", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 163 | VG_(name_UOpcode)(True, i), |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 164 | histogram[i].counts, count_pc, |
| 165 | avg_size, size_pc); |
| 166 | |
sewardj | 05bcdcb | 2003-05-18 10:05:38 +0000 | [diff] [blame] | 167 | for (j = 0; j < (Int)size_pc; j++) VG_(printf)("O"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 168 | VG_(printf)("\n"); |
| 169 | |
| 170 | } else { |
| 171 | vg_assert(0 == histogram[i].size); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | VG_(printf)("total UInstrs %u, total size %u\n", total_counts, total_size); |
| 176 | } |
| 177 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 178 | static void expandEmittedCode ( void ) |
| 179 | { |
| 180 | Int i; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 181 | UChar *tmp = VG_(arena_malloc)(VG_AR_JITTER, 2 * emitted_code_size); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 182 | /* VG_(printf)("expand to %d\n", 2 * emitted_code_size); */ |
| 183 | for (i = 0; i < emitted_code_size; i++) |
| 184 | tmp[i] = emitted_code[i]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 185 | VG_(arena_free)(VG_AR_JITTER, emitted_code); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 186 | emitted_code = tmp; |
| 187 | emitted_code_size *= 2; |
| 188 | } |
| 189 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 190 | /* Local calls will be inlined, cross-module ones not */ |
| 191 | __inline__ void VG_(emitB) ( UInt b ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 192 | { |
| 193 | if (dis) { |
| 194 | if (b < 16) VG_(printf)("0%x ", b); else VG_(printf)("%2x ", b); |
| 195 | } |
| 196 | if (emitted_code_used == emitted_code_size) |
| 197 | expandEmittedCode(); |
| 198 | |
| 199 | emitted_code[emitted_code_used] = (UChar)b; |
| 200 | emitted_code_used++; |
| 201 | } |
| 202 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 203 | __inline__ void VG_(emitW) ( UInt l ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 204 | { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 205 | VG_(emitB) ( (l) & 0x000000FF ); |
| 206 | VG_(emitB) ( (l >> 8) & 0x000000FF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 207 | } |
| 208 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 209 | __inline__ void VG_(emitL) ( UInt l ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 210 | { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 211 | VG_(emitB) ( (l) & 0x000000FF ); |
| 212 | VG_(emitB) ( (l >> 8) & 0x000000FF ); |
| 213 | VG_(emitB) ( (l >> 16) & 0x000000FF ); |
| 214 | VG_(emitB) ( (l >> 24) & 0x000000FF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 215 | } |
| 216 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 217 | static void emit_get_eflags ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 218 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 219 | Int off = 4 * VGOFF_(m_eflags); |
| 220 | vg_assert(off >= 0 && off < 128); |
| 221 | |
| 222 | if (dis) |
| 223 | VG_(printf)("\t %4d: ", emitted_code_used ); |
| 224 | |
| 225 | VG_(emitB) ( 0xFF ); /* PUSHL off(%ebp) */ |
| 226 | VG_(emitB) ( 0x75 ); |
| 227 | VG_(emitB) ( off ); |
| 228 | VG_(emitB) ( 0x9D ); /* POPFL */ |
| 229 | if (dis) |
| 230 | VG_(printf)( "\n\t\tpushl %d(%%ebp) ; popfl\n", off ); |
| 231 | } |
| 232 | |
| 233 | static void emit_put_eflags ( void ) |
| 234 | { |
| 235 | Int off = 4 * VGOFF_(m_eflags); |
| 236 | vg_assert(off >= 0 && off < 128); |
| 237 | |
| 238 | if (dis) |
| 239 | VG_(printf)("\t %4d: ", emitted_code_used ); |
| 240 | |
| 241 | VG_(emitB) ( 0x9C ); /* PUSHFL */ |
| 242 | VG_(emitB) ( 0x8F ); /* POPL vg_m_state.m_eflags */ |
| 243 | VG_(emitB) ( 0x45 ); |
| 244 | VG_(emitB) ( off ); |
| 245 | if (dis) |
| 246 | VG_(printf)( "\n\t\tpushfl ; popl %d(%%ebp)\n", off ); |
| 247 | } |
| 248 | |
| 249 | static void maybe_emit_put_eflags( void ) |
| 250 | { |
| 251 | if (eflags_state == UPD_Real) { |
| 252 | eflags_state = UPD_Both; |
| 253 | emit_put_eflags(); |
| 254 | } |
| 255 | } |
| 256 | |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 257 | |
| 258 | /* evidently unused */ |
| 259 | #if 0 |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 260 | static void maybe_emit_get_eflags( void ) |
| 261 | { |
| 262 | if (eflags_state == UPD_Simd) { |
| 263 | eflags_state = UPD_Both; |
| 264 | emit_get_eflags(); |
| 265 | } |
| 266 | } |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 267 | #endif |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 268 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 269 | |
| 270 | #if 0 |
| 271 | /* begin UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED */ |
| 272 | /* An alternative implementation of new_emit in which the |
| 273 | state space is explicitly enumerated. */ |
| 274 | __inline__ |
| 275 | void VG_(new_emit) ( Bool upds_simd_flags, |
| 276 | FlagSet use_flags, FlagSet set_flags ) |
| 277 | { |
| 278 | Bool simd = upds_simd_flags; |
| 279 | enum _eflags_state where = eflags_state; |
| 280 | |
| 281 | enum { WNone, WSome, WAll } ww; |
| 282 | Bool rr; |
| 283 | |
| 284 | #define DIS_HEADER \ |
| 285 | if (dis) \ |
| 286 | VG_(printf)("\t %4d: ", emitted_code_used ); |
| 287 | |
| 288 | if (use_flags == FlagsEmpty) { |
| 289 | rr = False; |
| 290 | } else { |
| 291 | rr = True; |
| 292 | } |
| 293 | |
| 294 | if (set_flags == FlagsEmpty) { |
| 295 | ww = WNone; |
| 296 | } else |
| 297 | if (set_flags == FlagsOSZACP) { |
| 298 | ww = WAll; |
| 299 | } else { |
| 300 | ww = WSome; |
| 301 | } |
| 302 | |
| 303 | /* If we're not wanting to interact with simd flags, and the simd |
| 304 | flags are not in the real flags, then do nothing. */ |
| 305 | if (simd == False && where == UPD_Simd) |
| 306 | goto noaction; |
| 307 | |
| 308 | if (simd == True && where == UPD_Simd && rr == False && ww == WAll) { |
| 309 | /* We're going to generate a complete new simd flag state without |
| 310 | consulting the old one first, so just deem this insn to create |
| 311 | the state in the real flags. */ |
| 312 | eflags_state = UPD_Real; |
| 313 | DIS_HEADER; |
| 314 | return; |
| 315 | } |
| 316 | |
| 317 | if (simd == True && where == UPD_Simd && rr == False && ww == WSome) { |
| 318 | /* Want to partially update the flags state, but is in simd. So |
| 319 | fetch it first, then declare that the real state is the most |
| 320 | recent. */ |
| 321 | emit_get_eflags(); |
| 322 | eflags_state = UPD_Real; |
| 323 | DIS_HEADER; |
| 324 | return; |
| 325 | } |
| 326 | |
| 327 | if (simd == True && where == UPD_Simd && rr == True && ww == WNone) { |
| 328 | /* want to read simd flags, but not in real -> copy to real. */ |
| 329 | emit_get_eflags(); |
| 330 | eflags_state = UPD_Both; |
| 331 | DIS_HEADER; |
| 332 | return; |
| 333 | } |
| 334 | |
| 335 | if (simd == True && where == UPD_Simd && rr == True && ww == WAll) { |
| 336 | /* want to read and write simd flags, but not in real -> copy to |
| 337 | real. State is then Real since they get updated. */ |
| 338 | emit_get_eflags(); |
| 339 | eflags_state = UPD_Real; |
| 340 | DIS_HEADER; |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | if (simd == True && where == UPD_Simd && rr == False && ww == WNone) { |
| 345 | /* Doesn't really make sense. Want to interact with simd flags, |
| 346 | but insn doesn't modify them. So don't do anything. ??? */ |
| 347 | goto noaction; |
| 348 | } |
| 349 | |
| 350 | if (simd == True && where == UPD_Real && rr == False && ww == WNone) { |
| 351 | /* Doesn't really make sense. Want to interact with simd flags, |
| 352 | but insn doesn't modify them. So don't do anything. ??? */ |
| 353 | goto noaction; |
| 354 | } |
| 355 | |
| 356 | if (simd == True && where == UPD_Real && rr == True && ww == WNone) { |
| 357 | /* simd is in real. Insn reads real but does not change. --> do |
| 358 | nothing. */ |
| 359 | goto noaction; |
| 360 | } |
| 361 | |
| 362 | if (simd == True && where == UPD_Real && rr == True && ww == WAll) { |
| 363 | /* simd is in real. we want to capture changes made by it. --> |
| 364 | do nothing */ |
| 365 | goto noaction; |
| 366 | } |
| 367 | |
| 368 | if (simd == True && where == UPD_Real && rr == False && ww == WAll) { |
| 369 | /* simd is in real. Insn creates new simd state. --> leave in |
| 370 | real */ |
| 371 | goto noaction; |
| 372 | } |
| 373 | |
| 374 | if (simd == True && where == UPD_Both && rr == False && ww == WAll) { |
| 375 | /* simd is in both. Insn creates new simd state. --> change |
| 376 | state to Real. */ |
| 377 | narrow_Both_to_Real: |
| 378 | eflags_state = UPD_Real; |
| 379 | DIS_HEADER; |
| 380 | return; |
| 381 | } |
| 382 | |
| 383 | if (simd == True && where == UPD_Both && rr == False && ww == WSome) { |
| 384 | /* simd is in both. Insn creates partial new simd state. --> |
| 385 | change state to Real. No need to get, since Both holds. */ |
| 386 | goto narrow_Both_to_Real; |
| 387 | } |
| 388 | |
| 389 | if (simd == True && where == UPD_Real && rr == False && ww == WSome) { |
| 390 | /* simd is in real. Insn creates new simd state. --> leave in |
| 391 | real */ |
| 392 | goto noaction; |
| 393 | } |
| 394 | |
| 395 | if (simd == True && where == UPD_Both && rr == True && ww == WNone) |
| 396 | /* want to read the simd flags, but already have a copy in real, |
| 397 | and not planning to modify it --> do nothing. */ |
| 398 | goto noaction; |
| 399 | |
| 400 | //////////////// |
| 401 | |
| 402 | if (simd == False && where == UPD_Real && rr == False && ww == WNone) |
| 403 | /* simd state is in real, but insn doesn't touch it --> do nothing */ |
| 404 | goto noaction; |
| 405 | |
| 406 | if (simd == False && where == UPD_Both && rr == False && ww == WNone) |
| 407 | /* simd state is in both, insn doesn't touch it --> do nothing */ |
| 408 | goto noaction; |
| 409 | |
| 410 | if (simd == False && where == UPD_Both && rr == False && ww == WAll) { |
| 411 | /* simd state is in both. insn trashes real, therefore declare |
| 412 | simd state only in simd. */ |
| 413 | narrow_Both_to_Simd: |
| 414 | eflags_state = UPD_Simd; |
| 415 | DIS_HEADER; |
| 416 | return; |
| 417 | } |
| 418 | |
| 419 | if (simd == False && where == UPD_Both && rr == False && ww == WSome) { |
| 420 | /* simd state is in both. insn trashes real, therefore declare |
| 421 | simd state only in simd. */ |
| 422 | goto narrow_Both_to_Simd; |
| 423 | } |
| 424 | |
| 425 | if (simd == False && where == UPD_Real && rr == False && ww == WAll) { |
| 426 | /* simd state is in real; we don't want simd state changed, but |
| 427 | insn writes the flags. Therefore have to copy back first. */ |
| 428 | put_flags_and_continue: |
| 429 | emit_put_eflags(); |
| 430 | eflags_state = UPD_Simd; |
| 431 | DIS_HEADER; |
| 432 | return; |
| 433 | } |
| 434 | |
| 435 | if (simd == False && where == UPD_Real && rr == False && ww == WSome) { |
| 436 | /* simd state is in real; we don't want simd state changed, but |
| 437 | insn writes the flags. Therefore have to copy back first. */ |
| 438 | goto put_flags_and_continue; |
| 439 | } |
| 440 | |
| 441 | goto unhandled; |
| 442 | |
| 443 | noaction: |
| 444 | DIS_HEADER; |
| 445 | return; |
| 446 | |
| 447 | // if (simd == False && where == UPD_Simd && FL_NONE(rrr) && FL_SOME(www)) { |
| 448 | // return; |
| 449 | //} |
| 450 | |
| 451 | unhandled: |
| 452 | VG_(printf)("simd %s, where %s, read %s, write %s\n", |
| 453 | simd ? "True " : "False", |
| 454 | (eflags_state == UPD_Simd ? "Simd" : (eflags_state == UPD_Real |
| 455 | ? "Real" : "Both")), |
| 456 | rr ? "True " : "False", |
| 457 | ww == WNone ? "None" : ww == WSome ? "Some" : "All " |
| 458 | ); |
| 459 | |
| 460 | VG_(core_panic)("new_emit"); |
| 461 | } |
| 462 | /* end UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED UNUSED */ |
| 463 | #endif |
| 464 | |
| 465 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 466 | /* Call this before emitting each instruction. |
| 467 | |
| 468 | Arguments are: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 469 | interacts_with_simd_flags: |
| 470 | if true, this instruction wants to interact (read and/or write) |
| 471 | the simulated %EFLAGS state, |
| 472 | otherwise it doesn't want to. |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 473 | use_flags: set of (real) flags the instruction uses |
| 474 | set_flags: set of (real) flags the instruction sets |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 475 | */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 476 | __inline__ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 477 | void VG_(new_emit) ( Bool interacts_with_simd_flags, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 478 | FlagSet use_flags, FlagSet set_flags ) |
| 479 | { |
| 480 | Bool use, set; |
| 481 | |
| 482 | use = use_flags != FlagsEmpty |
| 483 | || (set_flags != FlagsEmpty && set_flags != FlagsOSZACP); |
| 484 | set = set_flags != FlagsEmpty; |
| 485 | |
| 486 | if (0) |
| 487 | VG_(printf)( |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 488 | "new_emit: state=%d interacts_with_simd_flags=%d " |
| 489 | "use_flags=%x set_flags=%x\n", |
| 490 | eflags_state, interacts_with_simd_flags, use_flags, set_flags); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 491 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 492 | if (interacts_with_simd_flags) { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 493 | if (use && eflags_state == UPD_Simd) { |
| 494 | /* we need the CPU flags set, but they're not already */ |
| 495 | eflags_state = UPD_Both; |
| 496 | emit_get_eflags(); |
| 497 | } |
| 498 | if (set) { |
| 499 | /* if we're setting the flags, then the CPU will have the |
| 500 | only good copy */ |
| 501 | eflags_state = UPD_Real; |
| 502 | } |
| 503 | } else { |
| 504 | /* presume that if non-simd code is using flags, it knows what |
| 505 | it's doing (ie, it just set up the flags). */ |
| 506 | if (set) { |
| 507 | /* This instruction is going to trash the flags, so we'd |
| 508 | better save them away and say that they're only in the |
| 509 | simulated state. */ |
| 510 | maybe_emit_put_eflags(); |
| 511 | eflags_state = UPD_Simd; |
| 512 | } |
| 513 | } |
| 514 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 515 | if (dis) |
| 516 | VG_(printf)("\t %4d: ", emitted_code_used ); |
| 517 | } |
| 518 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 519 | |
| 520 | /*----------------------------------------------------*/ |
| 521 | /*--- Addressing modes ---*/ |
| 522 | /*----------------------------------------------------*/ |
| 523 | |
| 524 | static __inline__ UChar mkModRegRM ( UChar mod, UChar reg, UChar regmem ) |
| 525 | { |
| 526 | return ((mod & 3) << 6) | ((reg & 7) << 3) | (regmem & 7); |
| 527 | } |
| 528 | |
| 529 | static __inline__ UChar mkSIB ( Int scale, Int regindex, Int regbase ) |
| 530 | { |
| 531 | Int shift; |
| 532 | switch (scale) { |
| 533 | case 1: shift = 0; break; |
| 534 | case 2: shift = 1; break; |
| 535 | case 4: shift = 2; break; |
| 536 | case 8: shift = 3; break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 537 | default: VG_(core_panic)( "mkSIB" ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 538 | } |
| 539 | return ((shift & 3) << 6) | ((regindex & 7) << 3) | (regbase & 7); |
| 540 | } |
| 541 | |
| 542 | static __inline__ void emit_amode_litmem_reg ( Addr addr, Int reg ) |
| 543 | { |
| 544 | /* ($ADDR), reg */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 545 | VG_(emitB) ( mkModRegRM(0, reg, 5) ); |
| 546 | VG_(emitL) ( addr ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | static __inline__ void emit_amode_regmem_reg ( Int regmem, Int reg ) |
| 550 | { |
| 551 | /* (regmem), reg */ |
| 552 | if (regmem == R_ESP) |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 553 | VG_(core_panic)("emit_amode_regmem_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 554 | if (regmem == R_EBP) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 555 | VG_(emitB) ( mkModRegRM(1, reg, 5) ); |
| 556 | VG_(emitB) ( 0x00 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 557 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 558 | VG_(emitB)( mkModRegRM(0, reg, regmem) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 559 | } |
| 560 | } |
| 561 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 562 | void VG_(emit_amode_offregmem_reg) ( Int off, Int regmem, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 563 | { |
| 564 | if (regmem == R_ESP) |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 565 | VG_(core_panic)("emit_amode_offregmem_reg(ESP)"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 566 | if (off < -128 || off > 127) { |
| 567 | /* Use a large offset */ |
| 568 | /* d32(regmem), reg */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 569 | VG_(emitB) ( mkModRegRM(2, reg, regmem) ); |
| 570 | VG_(emitL) ( off ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 571 | } else { |
| 572 | /* d8(regmem), reg */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 573 | VG_(emitB) ( mkModRegRM(1, reg, regmem) ); |
| 574 | VG_(emitB) ( off & 0xFF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 575 | } |
| 576 | } |
| 577 | |
| 578 | static __inline__ void emit_amode_sib_reg ( Int off, Int scale, Int regbase, |
| 579 | Int regindex, Int reg ) |
| 580 | { |
| 581 | if (regindex == R_ESP) |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 582 | VG_(core_panic)("emit_amode_sib_reg(ESP)"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 583 | if (off < -128 || off > 127) { |
| 584 | /* Use a 32-bit offset */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 585 | VG_(emitB) ( mkModRegRM(2, reg, 4) ); /* SIB with 32-bit displacement */ |
| 586 | VG_(emitB) ( mkSIB( scale, regindex, regbase ) ); |
| 587 | VG_(emitL) ( off ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 588 | } else { |
| 589 | /* Use an 8-bit offset */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 590 | VG_(emitB) ( mkModRegRM(1, reg, 4) ); /* SIB with 8-bit displacement */ |
| 591 | VG_(emitB) ( mkSIB( scale, regindex, regbase ) ); |
| 592 | VG_(emitB) ( off & 0xFF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 593 | } |
| 594 | } |
| 595 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 596 | void VG_(emit_amode_ereg_greg) ( Int e_reg, Int g_reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 597 | { |
| 598 | /* other_reg, reg */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 599 | VG_(emitB) ( mkModRegRM(3, g_reg, e_reg) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | static __inline__ void emit_amode_greg_ereg ( Int g_reg, Int e_reg ) |
| 603 | { |
| 604 | /* other_reg, reg */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 605 | VG_(emitB) ( mkModRegRM(3, g_reg, e_reg) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | |
| 609 | /*----------------------------------------------------*/ |
| 610 | /*--- Opcode translation ---*/ |
| 611 | /*----------------------------------------------------*/ |
| 612 | |
| 613 | static __inline__ Int mkGrp1opcode ( Opcode opc ) |
| 614 | { |
| 615 | switch (opc) { |
| 616 | case ADD: return 0; |
| 617 | case OR: return 1; |
| 618 | case ADC: return 2; |
| 619 | case SBB: return 3; |
| 620 | case AND: return 4; |
| 621 | case SUB: return 5; |
| 622 | case XOR: return 6; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 623 | default: VG_(core_panic)("mkGrp1opcode"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 624 | } |
| 625 | } |
| 626 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 627 | static __inline__ FlagSet nonshiftop_use(Opcode opc) |
| 628 | { |
| 629 | switch(opc) { |
| 630 | case ADC: |
| 631 | case SBB: |
| 632 | return FlagC; |
| 633 | |
| 634 | case ADD: |
| 635 | case OR: |
| 636 | case AND: |
| 637 | case SUB: |
| 638 | case XOR: |
| 639 | return FlagsEmpty; |
| 640 | |
| 641 | default: |
| 642 | VG_(core_panic)("nonshiftop_use"); |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | static __inline__ FlagSet nonshiftop_set(Opcode opc) |
| 647 | { |
| 648 | switch(opc) { |
| 649 | case ADC: |
| 650 | case SBB: |
| 651 | case ADD: |
| 652 | case OR: |
| 653 | case AND: |
| 654 | case SUB: |
| 655 | case XOR: |
| 656 | return FlagsOSZACP; |
| 657 | |
| 658 | default: |
| 659 | VG_(core_panic)("nonshiftop_set"); |
| 660 | } |
| 661 | } |
| 662 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 663 | static __inline__ Int mkGrp2opcode ( Opcode opc ) |
| 664 | { |
| 665 | switch (opc) { |
| 666 | case ROL: return 0; |
| 667 | case ROR: return 1; |
| 668 | case RCL: return 2; |
| 669 | case RCR: return 3; |
| 670 | case SHL: return 4; |
| 671 | case SHR: return 5; |
| 672 | case SAR: return 7; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 673 | default: VG_(core_panic)("mkGrp2opcode"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 674 | } |
| 675 | } |
| 676 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 677 | static __inline__ FlagSet shiftop_use(Opcode opc) |
| 678 | { |
| 679 | switch(opc) { |
| 680 | case ROR: |
| 681 | case ROL: |
| 682 | case SHL: |
| 683 | case SHR: |
| 684 | case SAR: |
| 685 | return FlagsEmpty; |
| 686 | |
| 687 | case RCL: |
| 688 | case RCR: |
| 689 | return FlagC; |
| 690 | |
| 691 | default: |
| 692 | VG_(core_panic)("shiftop_use"); |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | static __inline__ FlagSet shiftop_set(Opcode opc) |
| 697 | { |
| 698 | switch(opc) { |
| 699 | case ROR: |
| 700 | case ROL: |
| 701 | case RCL: |
| 702 | case RCR: |
| 703 | return FlagsOC; |
| 704 | |
| 705 | case SHL: |
| 706 | case SHR: |
| 707 | case SAR: |
| 708 | return FlagsOSZACP; |
| 709 | |
| 710 | default: |
| 711 | VG_(core_panic)("shiftop_set"); |
| 712 | } |
| 713 | } |
| 714 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 715 | static __inline__ Int mkGrp3opcode ( Opcode opc ) |
| 716 | { |
| 717 | switch (opc) { |
| 718 | case NOT: return 2; |
| 719 | case NEG: return 3; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 720 | default: VG_(core_panic)("mkGrp3opcode"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 721 | } |
| 722 | } |
| 723 | |
| 724 | static __inline__ Int mkGrp4opcode ( Opcode opc ) |
| 725 | { |
| 726 | switch (opc) { |
| 727 | case INC: return 0; |
| 728 | case DEC: return 1; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 729 | default: VG_(core_panic)("mkGrp4opcode"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | |
| 733 | static __inline__ Int mkGrp5opcode ( Opcode opc ) |
| 734 | { |
| 735 | switch (opc) { |
| 736 | case CALLM: return 2; |
| 737 | case JMP: return 4; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 738 | default: VG_(core_panic)("mkGrp5opcode"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 739 | } |
| 740 | } |
| 741 | |
| 742 | static __inline__ UChar mkPrimaryOpcode ( Opcode opc ) |
| 743 | { |
| 744 | switch (opc) { |
| 745 | case ADD: return 0x00; |
| 746 | case ADC: return 0x10; |
| 747 | case AND: return 0x20; |
| 748 | case XOR: return 0x30; |
| 749 | case OR: return 0x08; |
| 750 | case SBB: return 0x18; |
| 751 | case SUB: return 0x28; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 752 | default: VG_(core_panic)("mkPrimaryOpcode"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 753 | } |
| 754 | } |
| 755 | |
| 756 | /*----------------------------------------------------*/ |
| 757 | /*--- v-size (4, or 2 with OSO) insn emitters ---*/ |
| 758 | /*----------------------------------------------------*/ |
| 759 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 760 | void VG_(emit_movv_offregmem_reg) ( Int sz, Int off, Int areg, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 761 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 762 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 763 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 764 | VG_(emitB) ( 0x8B ); /* MOV Ev, Gv */ |
| 765 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 766 | if (dis) |
| 767 | VG_(printf)( "\n\t\tmov%c\t0x%x(%s), %s\n", |
| 768 | nameISize(sz), off, nameIReg(4,areg), nameIReg(sz,reg)); |
| 769 | } |
| 770 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 771 | void VG_(emit_movv_reg_offregmem) ( Int sz, Int reg, Int off, Int areg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 772 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 773 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 774 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 775 | VG_(emitB) ( 0x89 ); /* MOV Gv, Ev */ |
| 776 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 777 | if (dis) |
| 778 | VG_(printf)( "\n\t\tmov%c\t%s, 0x%x(%s)\n", |
| 779 | nameISize(sz), nameIReg(sz,reg), off, nameIReg(4,areg)); |
| 780 | } |
| 781 | |
| 782 | static void emit_movv_regmem_reg ( Int sz, Int reg1, Int reg2 ) |
| 783 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 784 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 785 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 786 | VG_(emitB) ( 0x8B ); /* MOV Ev, Gv */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 787 | emit_amode_regmem_reg ( reg1, reg2 ); |
| 788 | if (dis) |
| 789 | VG_(printf)( "\n\t\tmov%c\t(%s), %s\n", |
| 790 | nameISize(sz), nameIReg(4,reg1), nameIReg(sz,reg2)); |
| 791 | } |
| 792 | |
| 793 | static void emit_movv_reg_regmem ( Int sz, Int reg1, Int reg2 ) |
| 794 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 795 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 796 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 797 | VG_(emitB) ( 0x89 ); /* MOV Gv, Ev */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 798 | emit_amode_regmem_reg ( reg2, reg1 ); |
| 799 | if (dis) |
| 800 | VG_(printf)( "\n\t\tmov%c\t%s, (%s)\n", |
| 801 | nameISize(sz), nameIReg(sz,reg1), nameIReg(4,reg2)); |
| 802 | } |
| 803 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 804 | void VG_(emit_movv_reg_reg) ( Int sz, Int reg1, Int reg2 ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 805 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 806 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 807 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 808 | VG_(emitB) ( 0x89 ); /* MOV Gv, Ev */ |
| 809 | VG_(emit_amode_ereg_greg) ( reg2, reg1 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 810 | if (dis) |
| 811 | VG_(printf)( "\n\t\tmov%c\t%s, %s\n", |
| 812 | nameISize(sz), nameIReg(sz,reg1), nameIReg(sz,reg2)); |
| 813 | } |
| 814 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 815 | void VG_(emit_nonshiftopv_lit_reg) ( Bool simd_flags, |
| 816 | Int sz, Opcode opc, |
| 817 | UInt lit, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 818 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 819 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 820 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 821 | if (sz == 2) VG_(emitB) ( 0x66 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 822 | if (lit == VG_(extend_s_8to32)(lit & 0x000000FF)) { |
| 823 | /* short form OK */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 824 | VG_(emitB) ( 0x83 ); /* Grp1 Ib,Ev */ |
| 825 | VG_(emit_amode_ereg_greg) ( reg, mkGrp1opcode(opc) ); |
| 826 | VG_(emitB) ( lit & 0x000000FF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 827 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 828 | VG_(emitB) ( 0x81 ); /* Grp1 Iv,Ev */ |
| 829 | VG_(emit_amode_ereg_greg) ( reg, mkGrp1opcode(opc) ); |
| 830 | if (sz == 2) VG_(emitW) ( lit ); else VG_(emitL) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 831 | } |
| 832 | if (dis) |
| 833 | VG_(printf)( "\n\t\t%s%c\t$0x%x, %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 834 | VG_(name_UOpcode)(False,opc), nameISize(sz), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 835 | lit, nameIReg(sz,reg)); |
| 836 | } |
| 837 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 838 | void VG_(emit_nonshiftopv_lit_offregmem) ( Bool simd_flags, Int sz, |
| 839 | Opcode opc, UInt lit, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 840 | Int off, Int regmem ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 841 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 842 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 843 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 844 | if (lit == VG_(extend_s_8to32)(lit & 0x000000FF)) { |
| 845 | /* short form OK */ |
| 846 | VG_(emitB) ( 0x83 ); /* Grp1 Ib,Ev */ |
| 847 | VG_(emit_amode_offregmem_reg) ( off, regmem, mkGrp1opcode(opc) ); |
| 848 | VG_(emitB) ( lit & 0x000000FF ); |
| 849 | } else { |
| 850 | VG_(emitB) ( 0x81 ); /* Grp1 Iv,Ev */ |
| 851 | VG_(emit_amode_offregmem_reg) ( off, regmem, mkGrp1opcode(opc) ); |
| 852 | if (sz == 2) VG_(emitW) ( lit ); else VG_(emitL) ( lit ); |
| 853 | } |
| 854 | if (dis) |
| 855 | VG_(printf)( "\n\t\t%s%c\t$0x%x, 0x%x(%s)\n", |
| 856 | VG_(name_UOpcode)(False,opc), nameISize(sz), |
| 857 | lit, off, nameIReg(sz,regmem)); |
| 858 | } |
| 859 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 860 | void VG_(emit_shiftopv_lit_reg) ( Bool simd_flags, |
| 861 | Int sz, Opcode opc, |
| 862 | UInt lit, Int reg ) |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 863 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 864 | VG_(new_emit)(simd_flags, shiftop_use(opc), shiftop_set(opc)); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 865 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 866 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 867 | VG_(emitB) ( 0xC1 ); /* Grp2 Ib,Ev */ |
| 868 | VG_(emit_amode_ereg_greg) ( reg, mkGrp2opcode(opc) ); |
| 869 | VG_(emitB) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 870 | if (dis) |
| 871 | VG_(printf)( "\n\t\t%s%c\t$%d, %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 872 | VG_(name_UOpcode)(False,opc), nameISize(sz), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 873 | lit, nameIReg(sz,reg)); |
| 874 | } |
| 875 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 876 | static void emit_shiftopv_cl_stack0 ( Bool simd_flags, Int sz, Opcode opc ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 877 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 878 | VG_(new_emit)(simd_flags, shiftop_use(opc), shiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 879 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 880 | VG_(emitB) ( 0xD3 ); /* Grp2 CL,Ev */ |
| 881 | VG_(emitB) ( mkModRegRM ( 1, mkGrp2opcode(opc), 4 ) ); |
| 882 | VG_(emitB) ( 0x24 ); /* a SIB, I think `d8(%esp)' */ |
| 883 | VG_(emitB) ( 0x00 ); /* the d8 displacement */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 884 | if (dis) |
| 885 | VG_(printf)("\n\t\t%s%c %%cl, 0(%%esp)\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 886 | VG_(name_UOpcode)(False,opc), nameISize(sz) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 887 | } |
| 888 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 889 | static void emit_shiftopb_cl_stack0 ( Bool simd_flags, Opcode opc ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 890 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 891 | VG_(new_emit)(simd_flags, shiftop_use(opc), shiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 892 | VG_(emitB) ( 0xD2 ); /* Grp2 CL,Eb */ |
| 893 | VG_(emitB) ( mkModRegRM ( 1, mkGrp2opcode(opc), 4 ) ); |
| 894 | VG_(emitB) ( 0x24 ); /* a SIB, I think `d8(%esp)' */ |
| 895 | VG_(emitB) ( 0x00 ); /* the d8 displacement */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 896 | if (dis) |
| 897 | VG_(printf)("\n\t\t%s%c %%cl, 0(%%esp)\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 898 | VG_(name_UOpcode)(False,opc), nameISize(1) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 899 | } |
| 900 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 901 | static void emit_nonshiftopv_offregmem_reg ( Bool simd_flags, Int sz, |
| 902 | Opcode opc, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 903 | Int off, Int areg, Int reg ) |
| 904 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 905 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 906 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 907 | VG_(emitB) ( 3 + mkPrimaryOpcode(opc) ); /* op Ev, Gv */ |
| 908 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 909 | if (dis) |
| 910 | VG_(printf)( "\n\t\t%s%c\t0x%x(%s), %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 911 | VG_(name_UOpcode)(False,opc), nameISize(sz), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 912 | off, nameIReg(4,areg), nameIReg(sz,reg)); |
| 913 | } |
| 914 | |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 915 | #if 0 |
| 916 | /* evidently unused */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 917 | static void emit_nonshiftopv_reg_offregmem ( Bool simd_flags, Int sz, Opcode opc, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 918 | Int off, Int areg, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 919 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 920 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 921 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 922 | VG_(emitB) ( 1 + mkPrimaryOpcode(opc) ); /* op Gv, Ev */ |
| 923 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
| 924 | if (dis) |
| 925 | VG_(printf)( "\n\t\t%s%c\t0x%s, %x(%s),\n", |
| 926 | VG_(name_UOpcode)(False,opc), nameISize(sz), |
| 927 | nameIReg(sz,reg), off, nameIReg(4,areg)); |
| 928 | } |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 929 | #endif |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 930 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 931 | void VG_(emit_nonshiftopv_reg_reg) ( Bool simd_flags, Int sz, Opcode opc, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 932 | Int reg1, Int reg2 ) |
| 933 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 934 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 935 | if (sz == 2) VG_(emitB) ( 0x66 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 936 | # if 0 |
| 937 | /* Perfectly correct, but the GNU assembler uses the other form. |
| 938 | Therefore we too use the other form, to aid verification. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 939 | VG_(emitB) ( 3 + mkPrimaryOpcode(opc) ); /* op Ev, Gv */ |
| 940 | VG_(emit_amode_ereg_greg) ( reg1, reg2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 941 | # else |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 942 | VG_(emitB) ( 1 + mkPrimaryOpcode(opc) ); /* op Gv, Ev */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 943 | emit_amode_greg_ereg ( reg1, reg2 ); |
| 944 | # endif |
| 945 | if (dis) |
| 946 | VG_(printf)( "\n\t\t%s%c\t%s, %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 947 | VG_(name_UOpcode)(False,opc), nameISize(sz), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 948 | nameIReg(sz,reg1), nameIReg(sz,reg2)); |
| 949 | } |
| 950 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 951 | void VG_(emit_movv_lit_reg) ( Int sz, UInt lit, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 952 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 953 | #if 0 |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 954 | if (lit == 0 && eflags_state != UPD_Real) { |
| 955 | /* Only emit this for zeroing if it won't stomp flags */ |
| 956 | VG_(emit_nonshiftopv_reg_reg) ( False, sz, XOR, reg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 957 | return; |
| 958 | } |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 959 | #endif |
| 960 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 961 | if (sz == 2) VG_(emitB) ( 0x66 ); |
| 962 | VG_(emitB) ( 0xB8+reg ); /* MOV imm, Gv */ |
| 963 | if (sz == 2) VG_(emitW) ( lit ); else VG_(emitL) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 964 | if (dis) |
| 965 | VG_(printf)( "\n\t\tmov%c\t$0x%x, %s\n", |
| 966 | nameISize(sz), lit, nameIReg(sz,reg)); |
| 967 | } |
| 968 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 969 | void VG_(emit_unaryopv_reg) ( Bool simd_flags, Int sz, Opcode opc, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 970 | { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 971 | switch (opc) { |
| 972 | case NEG: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 973 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZACP); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 974 | if (sz == 2) VG_(emitB) ( 0x66 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 975 | VG_(emitB) ( 0xF7 ); |
| 976 | VG_(emit_amode_ereg_greg) ( reg, mkGrp3opcode(NEG) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 977 | if (dis) |
| 978 | VG_(printf)( "\n\t\tneg%c\t%s\n", |
| 979 | nameISize(sz), nameIReg(sz,reg)); |
| 980 | break; |
| 981 | case NOT: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 982 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsEmpty); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 983 | if (sz == 2) VG_(emitB) ( 0x66 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 984 | VG_(emitB) ( 0xF7 ); |
| 985 | VG_(emit_amode_ereg_greg) ( reg, mkGrp3opcode(NOT) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 986 | if (dis) |
| 987 | VG_(printf)( "\n\t\tnot%c\t%s\n", |
| 988 | nameISize(sz), nameIReg(sz,reg)); |
| 989 | break; |
| 990 | case DEC: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 991 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZAP); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 992 | if (sz == 2) VG_(emitB) ( 0x66 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 993 | VG_(emitB) ( 0x48 + reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 994 | if (dis) |
| 995 | VG_(printf)( "\n\t\tdec%c\t%s\n", |
| 996 | nameISize(sz), nameIReg(sz,reg)); |
| 997 | break; |
| 998 | case INC: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 999 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZAP); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1000 | if (sz == 2) VG_(emitB) ( 0x66 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1001 | VG_(emitB) ( 0x40 + reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1002 | if (dis) |
| 1003 | VG_(printf)( "\n\t\tinc%c\t%s\n", |
| 1004 | nameISize(sz), nameIReg(sz,reg)); |
| 1005 | break; |
| 1006 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 1007 | VG_(core_panic)("VG_(emit_unaryopv_reg)"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1008 | } |
| 1009 | } |
| 1010 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1011 | void VG_(emit_pushv_reg) ( Int sz, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1012 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1013 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1014 | if (sz == 2) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1015 | VG_(emitB) ( 0x66 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1016 | } else { |
| 1017 | vg_assert(sz == 4); |
| 1018 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1019 | VG_(emitB) ( 0x50 + reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1020 | if (dis) |
| 1021 | VG_(printf)("\n\t\tpush%c %s\n", nameISize(sz), nameIReg(sz,reg)); |
| 1022 | } |
| 1023 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1024 | void VG_(emit_popv_reg) ( Int sz, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1025 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1026 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1027 | if (sz == 2) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1028 | VG_(emitB) ( 0x66 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1029 | } else { |
| 1030 | vg_assert(sz == 4); |
| 1031 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1032 | VG_(emitB) ( 0x58 + reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1033 | if (dis) |
| 1034 | VG_(printf)("\n\t\tpop%c %s\n", nameISize(sz), nameIReg(sz,reg)); |
| 1035 | } |
| 1036 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1037 | void VG_(emit_pushl_lit32) ( UInt int32 ) |
| 1038 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1039 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1040 | VG_(emitB) ( 0x68 ); |
| 1041 | VG_(emitL) ( int32 ); |
| 1042 | if (dis) |
| 1043 | VG_(printf)("\n\t\tpushl $0x%x\n", int32 ); |
| 1044 | } |
| 1045 | |
| 1046 | void VG_(emit_pushl_lit8) ( Int lit8 ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1047 | { |
| 1048 | vg_assert(lit8 >= -128 && lit8 < 128); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1049 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1050 | VG_(emitB) ( 0x6A ); |
| 1051 | VG_(emitB) ( (UChar)((UInt)lit8) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1052 | if (dis) |
| 1053 | VG_(printf)("\n\t\tpushl $%d\n", lit8 ); |
| 1054 | } |
| 1055 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1056 | void VG_(emit_cmpl_zero_reg) ( Bool simd_flags, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1057 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1058 | VG_(new_emit)(simd_flags, False, FlagsOSZACP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1059 | VG_(emitB) ( 0x83 ); |
| 1060 | VG_(emit_amode_ereg_greg) ( reg, 7 /* Grp 3 opcode for CMP */ ); |
| 1061 | VG_(emitB) ( 0x00 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1062 | if (dis) |
| 1063 | VG_(printf)("\n\t\tcmpl $0, %s\n", nameIReg(4,reg)); |
| 1064 | } |
| 1065 | |
| 1066 | static void emit_swapl_reg_ECX ( Int reg ) |
| 1067 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1068 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1069 | VG_(emitB) ( 0x87 ); /* XCHG Gv,Ev */ |
| 1070 | VG_(emit_amode_ereg_greg) ( reg, R_ECX ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1071 | if (dis) |
| 1072 | VG_(printf)("\n\t\txchgl %%ecx, %s\n", nameIReg(4,reg)); |
| 1073 | } |
| 1074 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1075 | void VG_(emit_swapl_reg_EAX) ( Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1076 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1077 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1078 | VG_(emitB) ( 0x90 + reg ); /* XCHG Gv,eAX */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1079 | if (dis) |
| 1080 | VG_(printf)("\n\t\txchgl %%eax, %s\n", nameIReg(4,reg)); |
| 1081 | } |
| 1082 | |
| 1083 | static void emit_swapl_reg_reg ( Int reg1, Int reg2 ) |
| 1084 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1085 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1086 | VG_(emitB) ( 0x87 ); /* XCHG Gv,Ev */ |
| 1087 | VG_(emit_amode_ereg_greg) ( reg1, reg2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1088 | if (dis) |
| 1089 | VG_(printf)("\n\t\txchgl %s, %s\n", nameIReg(4,reg1), |
| 1090 | nameIReg(4,reg2)); |
| 1091 | } |
| 1092 | |
| 1093 | static void emit_bswapl_reg ( Int reg ) |
| 1094 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1095 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1096 | VG_(emitB) ( 0x0F ); |
| 1097 | VG_(emitB) ( 0xC8 + reg ); /* BSWAP r32 */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1098 | if (dis) |
| 1099 | VG_(printf)("\n\t\tbswapl %s\n", nameIReg(4,reg)); |
| 1100 | } |
| 1101 | |
| 1102 | static void emit_movl_reg_reg ( Int regs, Int regd ) |
| 1103 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1104 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1105 | VG_(emitB) ( 0x89 ); /* MOV Gv,Ev */ |
| 1106 | VG_(emit_amode_ereg_greg) ( regd, regs ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1107 | if (dis) |
| 1108 | VG_(printf)("\n\t\tmovl %s, %s\n", nameIReg(4,regs), nameIReg(4,regd)); |
| 1109 | } |
| 1110 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1111 | void VG_(emit_movv_lit_offregmem) ( Int sz, UInt lit, Int off, Int memreg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1112 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1113 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1114 | if (sz == 2) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1115 | VG_(emitB) ( 0x66 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1116 | } else { |
| 1117 | vg_assert(sz == 4); |
| 1118 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1119 | VG_(emitB) ( 0xC7 ); /* Grp11 Ev */ |
| 1120 | VG_(emit_amode_offregmem_reg) ( off, memreg, 0 /* Grp11 subopcode for MOV */ ); |
| 1121 | if (sz == 2) VG_(emitW) ( lit ); else VG_(emitL) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1122 | if (dis) |
| 1123 | VG_(printf)( "\n\t\tmov%c\t$0x%x, 0x%x(%s)\n", |
| 1124 | nameISize(sz), lit, off, nameIReg(4,memreg) ); |
| 1125 | } |
| 1126 | |
| 1127 | |
| 1128 | /*----------------------------------------------------*/ |
| 1129 | /*--- b-size (1 byte) instruction emitters ---*/ |
| 1130 | /*----------------------------------------------------*/ |
| 1131 | |
| 1132 | /* There is some doubt as to whether C6 (Grp 11) is in the |
| 1133 | 486 insn set. ToDo: investigate. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1134 | void VG_(emit_movb_lit_offregmem) ( UInt lit, Int off, Int memreg ) |
| 1135 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1136 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1137 | VG_(emitB) ( 0xC6 ); /* Grp11 Eb */ |
| 1138 | VG_(emit_amode_offregmem_reg) ( off, memreg, 0 /* Grp11 subopcode for MOV */ ); |
| 1139 | VG_(emitB) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1140 | if (dis) |
| 1141 | VG_(printf)( "\n\t\tmovb\t$0x%x, 0x%x(%s)\n", |
| 1142 | lit, off, nameIReg(4,memreg) ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1143 | } |
| 1144 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1145 | static void emit_nonshiftopb_offregmem_reg ( Bool simd_flags, Opcode opc, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1146 | Int off, Int areg, Int reg ) |
| 1147 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1148 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1149 | VG_(emitB) ( 2 + mkPrimaryOpcode(opc) ); /* op Eb, Gb */ |
| 1150 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1151 | if (dis) |
| 1152 | VG_(printf)( "\n\t\t%sb\t0x%x(%s), %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 1153 | VG_(name_UOpcode)(False,opc), off, nameIReg(4,areg), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1154 | nameIReg(1,reg)); |
| 1155 | } |
| 1156 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1157 | static void emit_nonshiftopb_lit_offregmem ( Bool simd_flags, Opcode opc, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1158 | UInt lit, Int off, Int areg ) |
| 1159 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1160 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1161 | VG_(emitB) ( 0x80 ); |
| 1162 | VG_(emit_amode_offregmem_reg) ( off, areg, mkGrp1opcode(opc) ); |
| 1163 | VG_(emitB) ( lit ); |
| 1164 | if (dis) |
| 1165 | VG_(printf)( "\n\t\t%sb\t$0x%x, 0x%x(%s)\n", |
| 1166 | VG_(name_UOpcode)(False,opc), lit, off, nameIReg(4,areg)); |
| 1167 | } |
| 1168 | |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 1169 | #if 0 |
| 1170 | /* evidently unused */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1171 | static void emit_nonshiftopb_reg_offregmem ( Bool simd_flags, Opcode opc, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1172 | Int off, Int areg, Int reg ) |
| 1173 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1174 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1175 | VG_(emitB) ( 0 + mkPrimaryOpcode(opc) ); /* op Gb, Eb */ |
| 1176 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
| 1177 | if (dis) |
| 1178 | VG_(printf)( "\n\t\t%sb\t0x%s , %x(%s)\n", |
| 1179 | VG_(name_UOpcode)(False,opc), |
| 1180 | nameIReg(1,reg), |
| 1181 | off, nameIReg(4,areg)); |
| 1182 | } |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 1183 | #endif |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1184 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1185 | void VG_(emit_movb_reg_offregmem) ( Int reg, Int off, Int areg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1186 | { |
| 1187 | /* Could do better when reg == %al. */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1188 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1189 | VG_(emitB) ( 0x88 ); /* MOV G1, E1 */ |
| 1190 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1191 | if (dis) |
| 1192 | VG_(printf)( "\n\t\tmovb\t%s, 0x%x(%s)\n", |
| 1193 | nameIReg(1,reg), off, nameIReg(4,areg)); |
| 1194 | } |
| 1195 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1196 | static void emit_nonshiftopb_reg_reg ( Bool simd_flags, Opcode opc, |
| 1197 | Int reg1, Int reg2 ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1198 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1199 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1200 | VG_(emitB) ( 2 + mkPrimaryOpcode(opc) ); /* op Eb, Gb */ |
| 1201 | VG_(emit_amode_ereg_greg) ( reg1, reg2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1202 | if (dis) |
| 1203 | VG_(printf)( "\n\t\t%sb\t%s, %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 1204 | VG_(name_UOpcode)(False,opc), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1205 | nameIReg(1,reg1), nameIReg(1,reg2)); |
| 1206 | } |
| 1207 | |
| 1208 | static void emit_movb_reg_regmem ( Int reg1, Int reg2 ) |
| 1209 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1210 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1211 | VG_(emitB) ( 0x88 ); /* MOV G1, E1 */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1212 | emit_amode_regmem_reg ( reg2, reg1 ); |
| 1213 | if (dis) |
| 1214 | VG_(printf)( "\n\t\tmovb\t%s, (%s)\n", nameIReg(1,reg1), |
| 1215 | nameIReg(4,reg2)); |
| 1216 | } |
| 1217 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1218 | static void emit_nonshiftopb_lit_reg ( Bool simd_flags, Opcode opc, |
| 1219 | UInt lit, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1220 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1221 | VG_(new_emit)(simd_flags, nonshiftop_use(opc), nonshiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1222 | VG_(emitB) ( 0x80 ); /* Grp1 Ib,Eb */ |
| 1223 | VG_(emit_amode_ereg_greg) ( reg, mkGrp1opcode(opc) ); |
| 1224 | VG_(emitB) ( lit & 0x000000FF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1225 | if (dis) |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 1226 | VG_(printf)( "\n\t\t%sb\t$0x%x, %s\n", VG_(name_UOpcode)(False,opc), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1227 | lit, nameIReg(1,reg)); |
| 1228 | } |
| 1229 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1230 | static void emit_shiftopb_lit_reg ( Bool simd_flags, Opcode opc, |
| 1231 | UInt lit, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1232 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1233 | VG_(new_emit)(simd_flags, shiftop_use(opc), shiftop_set(opc)); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1234 | VG_(emitB) ( 0xC0 ); /* Grp2 Ib,Eb */ |
| 1235 | VG_(emit_amode_ereg_greg) ( reg, mkGrp2opcode(opc) ); |
| 1236 | VG_(emitB) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1237 | if (dis) |
| 1238 | VG_(printf)( "\n\t\t%sb\t$%d, %s\n", |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 1239 | VG_(name_UOpcode)(False,opc), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1240 | lit, nameIReg(1,reg)); |
| 1241 | } |
| 1242 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1243 | void VG_(emit_unaryopb_reg) ( Bool simd_flags, Opcode opc, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1244 | { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1245 | switch (opc) { |
| 1246 | case INC: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1247 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZAP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1248 | VG_(emitB) ( 0xFE ); |
| 1249 | VG_(emit_amode_ereg_greg) ( reg, mkGrp4opcode(INC) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1250 | if (dis) |
| 1251 | VG_(printf)( "\n\t\tincb\t%s\n", nameIReg(1,reg)); |
| 1252 | break; |
| 1253 | case DEC: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1254 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZAP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1255 | VG_(emitB) ( 0xFE ); |
| 1256 | VG_(emit_amode_ereg_greg) ( reg, mkGrp4opcode(DEC) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1257 | if (dis) |
| 1258 | VG_(printf)( "\n\t\tdecb\t%s\n", nameIReg(1,reg)); |
| 1259 | break; |
| 1260 | case NOT: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1261 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1262 | VG_(emitB) ( 0xF6 ); |
| 1263 | VG_(emit_amode_ereg_greg) ( reg, mkGrp3opcode(NOT) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1264 | if (dis) |
| 1265 | VG_(printf)( "\n\t\tnotb\t%s\n", nameIReg(1,reg)); |
| 1266 | break; |
| 1267 | case NEG: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1268 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZACP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1269 | VG_(emitB) ( 0xF6 ); |
| 1270 | VG_(emit_amode_ereg_greg) ( reg, mkGrp3opcode(NEG) ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1271 | if (dis) |
| 1272 | VG_(printf)( "\n\t\tnegb\t%s\n", nameIReg(1,reg)); |
| 1273 | break; |
| 1274 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 1275 | VG_(core_panic)("VG_(emit_unaryopb_reg)"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1276 | } |
| 1277 | } |
| 1278 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1279 | void VG_(emit_testb_lit_reg) ( Bool simd_flags, UInt lit, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1280 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1281 | VG_(new_emit)(simd_flags, FlagsEmpty, FlagsOSZACP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1282 | VG_(emitB) ( 0xF6 ); /* Grp3 Eb */ |
| 1283 | VG_(emit_amode_ereg_greg) ( reg, 0 /* Grp3 subopcode for TEST */ ); |
| 1284 | VG_(emitB) ( lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1285 | if (dis) |
| 1286 | VG_(printf)("\n\t\ttestb $0x%x, %s\n", lit, nameIReg(1,reg)); |
| 1287 | } |
| 1288 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1289 | /*----------------------------------------------------*/ |
| 1290 | /*--- zero-extended load emitters ---*/ |
| 1291 | /*----------------------------------------------------*/ |
| 1292 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1293 | void VG_(emit_movzbl_offregmem_reg) ( Int off, Int regmem, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1294 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1295 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1296 | VG_(emitB) ( 0x0F ); VG_(emitB) ( 0xB6 ); /* MOVZBL */ |
| 1297 | VG_(emit_amode_offregmem_reg) ( off, regmem, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1298 | if (dis) |
| 1299 | VG_(printf)( "\n\t\tmovzbl\t0x%x(%s), %s\n", |
| 1300 | off, nameIReg(4,regmem), nameIReg(4,reg)); |
| 1301 | } |
| 1302 | |
| 1303 | static void emit_movzbl_regmem_reg ( Int reg1, Int reg2 ) |
| 1304 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1305 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1306 | VG_(emitB) ( 0x0F ); VG_(emitB) ( 0xB6 ); /* MOVZBL */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1307 | emit_amode_regmem_reg ( reg1, reg2 ); |
| 1308 | if (dis) |
| 1309 | VG_(printf)( "\n\t\tmovzbl\t(%s), %s\n", nameIReg(4,reg1), |
| 1310 | nameIReg(4,reg2)); |
| 1311 | } |
| 1312 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1313 | void VG_(emit_movzwl_offregmem_reg) ( Int off, Int areg, Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1314 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1315 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1316 | VG_(emitB) ( 0x0F ); VG_(emitB) ( 0xB7 ); /* MOVZWL */ |
| 1317 | VG_(emit_amode_offregmem_reg) ( off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1318 | if (dis) |
| 1319 | VG_(printf)( "\n\t\tmovzwl\t0x%x(%s), %s\n", |
| 1320 | off, nameIReg(4,areg), nameIReg(4,reg)); |
| 1321 | } |
| 1322 | |
| 1323 | static void emit_movzwl_regmem_reg ( Int reg1, Int reg2 ) |
| 1324 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1325 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1326 | VG_(emitB) ( 0x0F ); VG_(emitB) ( 0xB7 ); /* MOVZWL */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1327 | emit_amode_regmem_reg ( reg1, reg2 ); |
| 1328 | if (dis) |
| 1329 | VG_(printf)( "\n\t\tmovzwl\t(%s), %s\n", nameIReg(4,reg1), |
| 1330 | nameIReg(4,reg2)); |
| 1331 | } |
| 1332 | |
| 1333 | /*----------------------------------------------------*/ |
| 1334 | /*--- FPU instruction emitters ---*/ |
| 1335 | /*----------------------------------------------------*/ |
| 1336 | |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 1337 | static void emit_get_sse_state ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1338 | { |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 1339 | Int off = 4 * VGOFF_(m_ssestate); |
| 1340 | if (VG_(have_ssestate)) { |
| 1341 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
| 1342 | VG_(emitB) ( 0x0F ); |
| 1343 | VG_(emitB) ( 0xAE ); VG_(emitB) ( 0x8D ); /* fxrstor d32(%ebp) */ |
| 1344 | VG_(emitL) ( off ); |
| 1345 | if (dis) |
| 1346 | VG_(printf)("\n\t\tfxrstor\t%d(%%ebp)\n", off ); |
| 1347 | } else { |
| 1348 | /* Not a SSE-capable CPU. Just do frstor. */ |
| 1349 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
| 1350 | VG_(emitB) ( 0xDD ); VG_(emitB) ( 0xA5 ); /* frstor d32(%ebp) */ |
| 1351 | VG_(emitL) ( off ); |
| 1352 | if (dis) |
| 1353 | VG_(printf)("\n\t\tfrstor\t%d(%%ebp)\n", off ); |
| 1354 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1355 | } |
| 1356 | |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 1357 | static void emit_put_sse_state ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1358 | { |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 1359 | Int off = 4 * VGOFF_(m_ssestate); |
| 1360 | if (VG_(have_ssestate)) { |
| 1361 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
| 1362 | VG_(emitB) ( 0x0F ); |
| 1363 | VG_(emitB) ( 0xAE ); VG_(emitB) ( 0x85 ); /* fxsave d32(%ebp) */ |
| 1364 | VG_(emitL) ( off ); |
| 1365 | if (dis) |
| 1366 | VG_(printf)("\n\t\tfxsave\t%d(%%ebp)\n", off ); |
| 1367 | } else { |
| 1368 | /* Not a SSE-capable CPU. Just do fnsave. */ |
| 1369 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
| 1370 | VG_(emitB) ( 0xDD ); VG_(emitB) ( 0xB5 ); /* fnsave d32(%ebp) */ |
| 1371 | VG_(emitL) ( off ); |
| 1372 | if (dis) |
| 1373 | VG_(printf)("\n\t\tfnsave\t%d(%%ebp)\n", off ); |
| 1374 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1375 | } |
| 1376 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1377 | static void emit_fpu_no_mem ( FlagSet uses_sflags, |
| 1378 | FlagSet sets_sflags, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1379 | UChar first_byte, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1380 | UChar second_byte ) |
| 1381 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1382 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1383 | VG_(emitB) ( first_byte ); |
| 1384 | VG_(emitB) ( second_byte ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1385 | if (dis) |
| 1386 | VG_(printf)("\n\t\tfpu-0x%x:0x%x\n", |
| 1387 | (UInt)first_byte, (UInt)second_byte ); |
| 1388 | } |
| 1389 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1390 | static void emit_fpu_regmem ( FlagSet uses_sflags, |
| 1391 | FlagSet sets_sflags, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1392 | UChar first_byte, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1393 | UChar second_byte_masked, |
| 1394 | Int reg ) |
| 1395 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1396 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1397 | VG_(emitB) ( first_byte ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1398 | emit_amode_regmem_reg ( reg, second_byte_masked >> 3 ); |
| 1399 | if (dis) |
| 1400 | VG_(printf)("\n\t\tfpu-0x%x:0x%x-(%s)\n", |
| 1401 | (UInt)first_byte, (UInt)second_byte_masked, |
| 1402 | nameIReg(4,reg) ); |
| 1403 | } |
| 1404 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 1405 | static void emit_MMX2_regmem ( FlagSet uses_sflags, |
| 1406 | FlagSet sets_sflags, |
| 1407 | UChar first_byte, |
| 1408 | UChar second_byte, |
| 1409 | Int ireg ) |
| 1410 | { |
| 1411 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
| 1412 | VG_(emitB) ( 0x0F ); |
| 1413 | VG_(emitB) ( first_byte ); |
| 1414 | second_byte &= 0x38; /* mask out mod and rm fields */ |
| 1415 | emit_amode_regmem_reg ( ireg, second_byte >> 3 ); |
| 1416 | if (dis) |
| 1417 | VG_(printf)("\n\t\tmmx2-0x%x:0x%x-(%s)\n", |
| 1418 | (UInt)first_byte, (UInt)second_byte, |
| 1419 | nameIReg(4,ireg) ); |
| 1420 | } |
| 1421 | |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 1422 | static void emit_MMX2_reg_to_mmxreg ( FlagSet uses_sflags, |
| 1423 | FlagSet sets_sflags, |
| 1424 | UChar first_byte, |
| 1425 | UChar second_byte, |
| 1426 | Int ireg ) |
| 1427 | { |
| 1428 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
| 1429 | VG_(emitB) ( 0x0F ); |
| 1430 | VG_(emitB) ( first_byte ); |
| 1431 | second_byte &= 0x38; /* mask out mod and rm fields */ |
| 1432 | second_byte |= 0xC0; /* set top two bits: mod = 11b */ |
| 1433 | second_byte |= (ireg & 7); /* patch in our ireg */ |
| 1434 | VG_(emitB) ( second_byte ); |
| 1435 | if (dis) |
sewardj | d1c9e43 | 2003-04-04 20:40:34 +0000 | [diff] [blame] | 1436 | VG_(printf)("\n\t\tmmx2:reg-to-mmxreg--0x%x:0x%x-(%s)\n", |
| 1437 | (UInt)first_byte, (UInt)second_byte, |
| 1438 | nameIReg(4,ireg) ); |
| 1439 | } |
| 1440 | |
| 1441 | static void emit_MMX2_mmxreg_to_reg ( FlagSet uses_sflags, |
| 1442 | FlagSet sets_sflags, |
| 1443 | UChar first_byte, |
| 1444 | UChar second_byte, |
| 1445 | Int ireg ) |
| 1446 | { |
| 1447 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
| 1448 | VG_(emitB) ( 0x0F ); |
| 1449 | VG_(emitB) ( first_byte ); |
| 1450 | second_byte &= 0x38; /* mask out mod and rm fields */ |
| 1451 | second_byte |= 0xC0; /* set top two bits: mod = 11b */ |
| 1452 | second_byte |= (ireg & 7); /* patch in our ireg */ |
| 1453 | VG_(emitB) ( second_byte ); |
| 1454 | if (dis) |
| 1455 | VG_(printf)("\n\t\tmmx2:mmxreg-to-reg--0x%x:0x%x-(%s)\n", |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 1456 | (UInt)first_byte, (UInt)second_byte, |
| 1457 | nameIReg(4,ireg) ); |
| 1458 | } |
| 1459 | |
| 1460 | static void emit_MMX3_no_mem ( FlagSet uses_sflags, |
| 1461 | FlagSet sets_sflags, |
| 1462 | UChar first_byte, |
| 1463 | UChar second_byte, |
| 1464 | UChar third_byte ) |
| 1465 | { |
| 1466 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
| 1467 | VG_(emitB) ( 0x0F ); |
| 1468 | VG_(emitB) ( first_byte ); |
| 1469 | VG_(emitB) ( second_byte ); |
| 1470 | VG_(emitB) ( third_byte ); |
| 1471 | if (dis) |
| 1472 | VG_(printf)("\n\t\tmmx3-0x%x:0x%x:0x%x\n", |
| 1473 | (UInt)first_byte, (UInt)second_byte, (UInt)third_byte ); |
| 1474 | } |
| 1475 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 1476 | static void emit_MMX2_no_mem ( FlagSet uses_sflags, |
| 1477 | FlagSet sets_sflags, |
| 1478 | UChar first_byte, |
| 1479 | UChar second_byte ) |
| 1480 | { |
| 1481 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
| 1482 | VG_(emitB) ( 0x0F ); |
| 1483 | VG_(emitB) ( first_byte ); |
| 1484 | VG_(emitB) ( second_byte ); |
| 1485 | if (dis) |
| 1486 | VG_(printf)("\n\t\tmmx2-0x%x:0x%x\n", |
| 1487 | (UInt)first_byte, (UInt)second_byte ); |
| 1488 | } |
| 1489 | |
| 1490 | static void emit_MMX1_no_mem ( FlagSet uses_sflags, |
| 1491 | FlagSet sets_sflags, |
| 1492 | UChar first_byte ) |
| 1493 | { |
| 1494 | VG_(new_emit)(True, uses_sflags, sets_sflags); |
| 1495 | VG_(emitB) ( 0x0F ); |
| 1496 | VG_(emitB) ( first_byte ); |
| 1497 | if (dis) |
| 1498 | VG_(printf)("\n\t\tmmx1-0x%x\n", |
| 1499 | (UInt)first_byte ); |
| 1500 | } |
| 1501 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1502 | |
| 1503 | /*----------------------------------------------------*/ |
| 1504 | /*--- misc instruction emitters ---*/ |
| 1505 | /*----------------------------------------------------*/ |
| 1506 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1507 | void VG_(emit_call_reg) ( Int reg ) |
| 1508 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1509 | VG_(new_emit)(False, FlagsEmpty, FlagsOSZACP); /* XXX */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1510 | VG_(emitB) ( 0xFF ); /* Grp5 */ |
| 1511 | VG_(emit_amode_ereg_greg) ( reg, mkGrp5opcode(CALLM) ); |
| 1512 | if (dis) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1513 | VG_(printf)( "\n\t\tcall\t*%s\n", nameIReg(4,reg) ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1514 | } |
| 1515 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1516 | static |
| 1517 | void emit_call_star_EBP_off ( Bool simd_flags, Int byte_off, |
| 1518 | FlagSet use_flag, FlagSet set_flag ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1519 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1520 | /* Used for helpers which expect to see Simd flags in Real flags */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1521 | VG_(new_emit)(simd_flags, use_flag, set_flag); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1522 | |
| 1523 | if (byte_off < -128 || byte_off > 127) { |
| 1524 | VG_(emitB) ( 0xFF ); |
| 1525 | VG_(emitB) ( 0x95 ); |
| 1526 | VG_(emitL) ( byte_off ); |
| 1527 | } else { |
| 1528 | VG_(emitB) ( 0xFF ); |
| 1529 | VG_(emitB) ( 0x55 ); |
| 1530 | VG_(emitB) ( byte_off ); |
| 1531 | } |
| 1532 | if (dis) |
| 1533 | VG_(printf)( "\n\t\tcall * %d(%%ebp)\n", byte_off ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1534 | } |
| 1535 | |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 1536 | #if 0 |
| 1537 | /* evidently unused */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1538 | static void emit_addlit8_offregmem ( Int lit8, Int regmem, Int off ) |
| 1539 | { |
| 1540 | vg_assert(lit8 >= -128 && lit8 < 128); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1541 | VG_(new_emit)(True, FlagsEmpty, FlagsOSZACP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1542 | VG_(emitB) ( 0x83 ); /* Grp1 Ib,Ev */ |
| 1543 | VG_(emit_amode_offregmem_reg) ( off, regmem, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1544 | 0 /* Grp1 subopcode for ADD */ ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1545 | VG_(emitB) ( lit8 & 0xFF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1546 | if (dis) |
| 1547 | VG_(printf)( "\n\t\taddl $%d, %d(%s)\n", lit8, off, |
| 1548 | nameIReg(4,regmem)); |
| 1549 | } |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 1550 | #endif |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1551 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1552 | void VG_(emit_add_lit_to_esp) ( Int lit ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1553 | { |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 1554 | if (lit < -128 || lit > 127) VG_(core_panic)("VG_(emit_add_lit_to_esp)"); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1555 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
| 1556 | VG_(emitB) ( 0x8D ); |
| 1557 | VG_(emitB) ( 0x64 ); |
| 1558 | VG_(emitB) ( 0x24 ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1559 | VG_(emitB) ( lit & 0xFF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1560 | if (dis) |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1561 | VG_(printf)( "\n\t\tlea\t%d(%%esp), %%esp\n", lit ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1562 | } |
| 1563 | |
| 1564 | |
| 1565 | static void emit_movb_AL_zeroESPmem ( void ) |
| 1566 | { |
| 1567 | /* movb %al, 0(%esp) */ |
| 1568 | /* 88442400 movb %al, 0(%esp) */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1569 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1570 | VG_(emitB) ( 0x88 ); |
| 1571 | VG_(emitB) ( 0x44 ); |
| 1572 | VG_(emitB) ( 0x24 ); |
| 1573 | VG_(emitB) ( 0x00 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1574 | if (dis) |
| 1575 | VG_(printf)( "\n\t\tmovb %%al, 0(%%esp)\n" ); |
| 1576 | } |
| 1577 | |
| 1578 | static void emit_movb_zeroESPmem_AL ( void ) |
| 1579 | { |
| 1580 | /* movb 0(%esp), %al */ |
| 1581 | /* 8A442400 movb 0(%esp), %al */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1582 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1583 | VG_(emitB) ( 0x8A ); |
| 1584 | VG_(emitB) ( 0x44 ); |
| 1585 | VG_(emitB) ( 0x24 ); |
| 1586 | VG_(emitB) ( 0x00 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1587 | if (dis) |
| 1588 | VG_(printf)( "\n\t\tmovb 0(%%esp), %%al\n" ); |
| 1589 | } |
| 1590 | |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 1591 | /* Jump target states */ |
| 1592 | #define TGT_UNDEF (1 << 16) |
| 1593 | #define TGT_FORWARD (2 << 16) |
| 1594 | #define TGT_BACKWARD (3 << 16) |
| 1595 | |
| 1596 | static inline Int tgt_state(Int tgt) |
| 1597 | { |
| 1598 | return tgt & 0xffff0000; |
| 1599 | } |
| 1600 | |
| 1601 | static inline Int tgt_addr(Int tgt) |
| 1602 | { |
| 1603 | return tgt & 0x0000ffff; |
| 1604 | } |
| 1605 | |
| 1606 | static inline Int mk_tgt(Int state, Int addr) |
| 1607 | { |
| 1608 | vg_assert(state == TGT_UNDEF |
| 1609 | || state == TGT_FORWARD || state == TGT_BACKWARD); |
| 1610 | vg_assert((addr & 0xffff0000) == 0); |
| 1611 | |
| 1612 | return state | addr; |
| 1613 | } |
| 1614 | |
| 1615 | void VG_(init_target) ( Int *tgt ) |
| 1616 | { |
| 1617 | *tgt = TGT_UNDEF; |
| 1618 | } |
| 1619 | |
| 1620 | void VG_(target_back) ( Int *tgt ) |
| 1621 | { |
| 1622 | vg_assert(tgt_state(*tgt) == TGT_UNDEF); |
| 1623 | |
| 1624 | *tgt = mk_tgt(TGT_BACKWARD, emitted_code_used); |
| 1625 | } |
| 1626 | |
| 1627 | void VG_(target_forward) ( Int *tgt ) |
| 1628 | { |
| 1629 | Int delta; |
| 1630 | |
| 1631 | vg_assert(tgt_state(*tgt) == TGT_FORWARD || |
| 1632 | tgt_state(*tgt) == TGT_UNDEF); |
| 1633 | |
| 1634 | if (tgt_state(*tgt) == TGT_UNDEF) |
| 1635 | return; /* target not used */ |
| 1636 | |
| 1637 | delta = emitted_code_used - (tgt_addr(*tgt) + 1); |
| 1638 | vg_assert(delta >= -128 && delta <= 127); |
| 1639 | vg_assert(tgt_addr(*tgt) >= 0); |
sewardj | bd6473c | 2002-12-12 23:50:22 +0000 | [diff] [blame] | 1640 | vg_assert(tgt_addr(*tgt) < emitted_code_used); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 1641 | emitted_code[tgt_addr(*tgt)] = delta; |
| 1642 | if (dis) |
| 1643 | VG_(printf)("(target to jump site %d; delta: %d)\n", |
| 1644 | tgt_addr(*tgt), delta); |
| 1645 | } |
| 1646 | |
| 1647 | void VG_(emit_target_delta) ( Int *tgt ) |
| 1648 | { |
| 1649 | vg_assert(tgt_state(*tgt) == TGT_UNDEF || |
| 1650 | tgt_state(*tgt) == TGT_BACKWARD); |
| 1651 | |
| 1652 | if (tgt_state(*tgt) == TGT_UNDEF) { |
| 1653 | /* forward jump */ |
| 1654 | *tgt = mk_tgt(TGT_FORWARD, emitted_code_used); |
| 1655 | VG_(emitB) (0x00); |
| 1656 | } else { |
| 1657 | /* backward jump */ |
| 1658 | Int delta = emitted_code_used - (tgt_addr(*tgt) + 1); |
| 1659 | vg_assert(delta >= -128 && delta <= 127); |
| 1660 | VG_(emitB) (delta); |
| 1661 | } |
| 1662 | } |
| 1663 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1664 | |
| 1665 | /* Emit a jump short with an 8-bit signed offset. Note that the |
| 1666 | offset is that which should be added to %eip once %eip has been |
| 1667 | advanced over this insn. */ |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1668 | void VG_(emit_jcondshort_delta) ( Bool simd_flags, Condcode cond, Int delta ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1669 | { |
| 1670 | vg_assert(delta >= -128 && delta <= 127); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1671 | VG_(new_emit)(simd_flags, FlagsOSZCP, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1672 | VG_(emitB) ( 0x70 + (UInt)cond ); |
| 1673 | VG_(emitB) ( (UChar)delta ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1674 | if (dis) |
| 1675 | VG_(printf)( "\n\t\tj%s-8\t%%eip+%d\n", |
njn | 563f96f | 2003-02-03 11:17:46 +0000 | [diff] [blame] | 1676 | VG_(name_UCondcode)(cond), delta ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1677 | } |
| 1678 | |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 1679 | /* Same as above, but defers emitting the delta */ |
| 1680 | void VG_(emit_jcondshort_target) ( Bool simd, Condcode cond, Int *tgt ) |
| 1681 | { |
sewardj | 706240d | 2002-12-26 17:10:12 +0000 | [diff] [blame] | 1682 | VG_(new_emit)(simd, FlagsOSZCP, FlagsEmpty); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 1683 | VG_(emitB) ( 0x70 + (UInt)cond ); |
| 1684 | VG_(emit_target_delta) (tgt); |
| 1685 | if (dis) |
| 1686 | VG_(printf)( "\n\t\tj%s-8\t%%eip+(%d)\n", |
njn | 563f96f | 2003-02-03 11:17:46 +0000 | [diff] [blame] | 1687 | VG_(name_UCondcode)(cond), tgt_addr(*tgt) ); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 1688 | } |
| 1689 | |
| 1690 | |
| 1691 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1692 | static void emit_setb_reg ( Bool simd, Int reg, Condcode cond ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1693 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1694 | VG_(new_emit)(simd, FlagsOSZCP, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1695 | VG_(emitB) ( 0x0F ); VG_(emitB) ( 0x90 + (UChar)cond ); |
| 1696 | VG_(emit_amode_ereg_greg) ( reg, 0 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1697 | if (dis) |
| 1698 | VG_(printf)("\n\t\tset%s %s\n", |
njn | 563f96f | 2003-02-03 11:17:46 +0000 | [diff] [blame] | 1699 | VG_(name_UCondcode)(cond), nameIReg(1,reg)); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1700 | } |
| 1701 | |
| 1702 | static void emit_ret ( void ) |
| 1703 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1704 | maybe_emit_put_eflags(); /* make sure flags are stored */ |
sewardj | 706240d | 2002-12-26 17:10:12 +0000 | [diff] [blame] | 1705 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1706 | VG_(emitB) ( 0xC3 ); /* RET */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1707 | if (dis) |
| 1708 | VG_(printf)("\n\t\tret\n"); |
| 1709 | } |
| 1710 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 1711 | /* Predicate used in sanity checks elsewhere - returns true if any |
| 1712 | jump-site is an actual chained jump */ |
| 1713 | Bool VG_(is_chained_jumpsite)(Addr a) |
| 1714 | { |
| 1715 | UChar *cp = (UChar *)a; |
| 1716 | |
| 1717 | return (*cp == 0xE9); /* 0xE9 -- jmp */ |
| 1718 | } |
| 1719 | |
sewardj | 83f1186 | 2002-12-01 02:07:08 +0000 | [diff] [blame] | 1720 | static |
| 1721 | Bool is_fresh_jumpsite(UChar *cp) |
| 1722 | { |
| 1723 | return |
| 1724 | cp[0] == 0x0F && /* UD2 */ |
| 1725 | cp[1] == 0x0B && |
| 1726 | cp[2] == 0x0F && /* UD2 */ |
| 1727 | cp[3] == 0x0B && |
| 1728 | cp[4] == 0x90; /* NOP */ |
| 1729 | } |
| 1730 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 1731 | /* Predicate used in sanity checks elsewhere - returns true if all |
| 1732 | jump-sites are calls to VG_(patch_me) */ |
| 1733 | Bool VG_(is_unchained_jumpsite)(Addr a) |
| 1734 | { |
| 1735 | UChar *cp = (UChar *)a; |
| 1736 | Int delta = ((Addr)&VG_(patch_me)) - (a + VG_PATCHME_CALLSZ); |
| 1737 | Int idelta; |
| 1738 | |
| 1739 | if (*cp++ != 0xE8) /* 0xE8 == call */ |
| 1740 | return False; |
| 1741 | |
| 1742 | idelta = (*cp++) << 0; |
| 1743 | idelta |= (*cp++) << 8; |
| 1744 | idelta |= (*cp++) << 16; |
| 1745 | idelta |= (*cp++) << 24; |
| 1746 | |
| 1747 | return idelta == delta; |
| 1748 | } |
| 1749 | |
| 1750 | /* Return target address for a direct jmp */ |
| 1751 | Addr VG_(get_jmp_dest)(Addr a) |
| 1752 | { |
| 1753 | Int delta; |
| 1754 | UChar *cp = (UChar *)a; |
| 1755 | |
| 1756 | if (*cp++ != 0xE9) /* 0xE9 == jmp */ |
| 1757 | return 0; |
| 1758 | |
| 1759 | delta = (*cp++) << 0; |
| 1760 | delta |= (*cp++) << 8; |
| 1761 | delta |= (*cp++) << 16; |
| 1762 | delta |= (*cp++) << 24; |
| 1763 | |
| 1764 | return a + VG_PATCHME_JMPSZ + delta; |
| 1765 | } |
| 1766 | |
| 1767 | /* unchain a BB by generating a call to VG_(patch_me) */ |
| 1768 | void VG_(unchain_jumpsite)(Addr a) |
| 1769 | { |
| 1770 | Int delta = ((Addr)&VG_(patch_me)) - (a + VG_PATCHME_CALLSZ); |
| 1771 | UChar *cp = (UChar *)a; |
| 1772 | |
| 1773 | if (VG_(is_unchained_jumpsite)(a)) |
| 1774 | return; /* don't write unnecessarily */ |
| 1775 | |
sewardj | 83f1186 | 2002-12-01 02:07:08 +0000 | [diff] [blame] | 1776 | if (!is_fresh_jumpsite(cp)) |
| 1777 | VG_(bb_dechain_count)++; /* update stats */ |
| 1778 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 1779 | *cp++ = 0xE8; /* call */ |
| 1780 | *cp++ = (delta >> 0) & 0xff; |
| 1781 | *cp++ = (delta >> 8) & 0xff; |
| 1782 | *cp++ = (delta >> 16) & 0xff; |
| 1783 | *cp++ = (delta >> 24) & 0xff; |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 1784 | } |
| 1785 | |
| 1786 | /* This doesn't actually generate a call to VG_(patch_me), but |
| 1787 | reserves enough space in the instruction stream for it to happen |
| 1788 | and records the offset into the jump table. This is because call |
| 1789 | is a relative jump, and so will be affected when this code gets |
| 1790 | moved about. The translation table will "unchain" this basic block |
| 1791 | on insertion (with VG_(unchain_BB)()), and thereby generate a |
| 1792 | proper call instruction. */ |
| 1793 | static void emit_call_patchme( void ) |
| 1794 | { |
| 1795 | vg_assert(VG_PATCHME_CALLSZ == 5); |
| 1796 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1797 | maybe_emit_put_eflags(); /* save flags before end of BB */ |
sewardj | 706240d | 2002-12-26 17:10:12 +0000 | [diff] [blame] | 1798 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 1799 | |
| 1800 | if (jumpidx >= VG_MAX_JUMPS) { |
| 1801 | /* If there too many jumps in this basic block, fall back to |
| 1802 | dispatch loop. We still need to keep it the same size as the |
| 1803 | call sequence. */ |
| 1804 | VG_(emitB) ( 0xC3 ); /* ret */ |
| 1805 | VG_(emitB) ( 0x90 ); /* nop */ |
| 1806 | VG_(emitB) ( 0x90 ); /* nop */ |
| 1807 | VG_(emitB) ( 0x90 ); /* nop */ |
| 1808 | VG_(emitB) ( 0x90 ); /* nop */ |
| 1809 | |
| 1810 | if (dis) |
| 1811 | VG_(printf)("\n\t\tret; nop; nop; nop; nop\n"); |
| 1812 | |
| 1813 | if (0 && VG_(clo_verbosity)) |
| 1814 | VG_(message)(Vg_DebugMsg, "too many chained jumps in basic-block"); |
| 1815 | } else { |
| 1816 | jumps[jumpidx++] = emitted_code_used; |
| 1817 | |
| 1818 | VG_(emitB) ( 0x0F ); /* UD2 - undefined instruction */ |
| 1819 | VG_(emitB) ( 0x0B ); |
| 1820 | VG_(emitB) ( 0x0F ); /* UD2 - undefined instruction */ |
| 1821 | VG_(emitB) ( 0x0B ); |
| 1822 | VG_(emitB) ( 0x90 ); /* NOP */ |
| 1823 | |
| 1824 | if (dis) |
| 1825 | VG_(printf)("\n\t\tud2; ud2; nop\n"); |
| 1826 | } |
| 1827 | } |
| 1828 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1829 | void VG_(emit_pushal) ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1830 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1831 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1832 | VG_(emitB) ( 0x60 ); /* PUSHAL */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1833 | if (dis) |
| 1834 | VG_(printf)("\n\t\tpushal\n"); |
| 1835 | } |
| 1836 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1837 | void VG_(emit_popal) ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1838 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1839 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1840 | VG_(emitB) ( 0x61 ); /* POPAL */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1841 | if (dis) |
| 1842 | VG_(printf)("\n\t\tpopal\n"); |
| 1843 | } |
| 1844 | |
| 1845 | static void emit_lea_litreg_reg ( UInt lit, Int regmem, Int reg ) |
| 1846 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1847 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1848 | VG_(emitB) ( 0x8D ); /* LEA M,Gv */ |
| 1849 | VG_(emit_amode_offregmem_reg) ( (Int)lit, regmem, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1850 | if (dis) |
| 1851 | VG_(printf)("\n\t\tleal 0x%x(%s), %s\n", |
| 1852 | lit, nameIReg(4,regmem), nameIReg(4,reg) ); |
| 1853 | } |
| 1854 | |
| 1855 | static void emit_lea_sib_reg ( UInt lit, Int scale, |
| 1856 | Int regbase, Int regindex, Int reg ) |
| 1857 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1858 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1859 | VG_(emitB) ( 0x8D ); /* LEA M,Gv */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1860 | emit_amode_sib_reg ( (Int)lit, scale, regbase, regindex, reg ); |
| 1861 | if (dis) |
| 1862 | VG_(printf)("\n\t\tleal 0x%x(%s,%s,%d), %s\n", |
| 1863 | lit, nameIReg(4,regbase), |
| 1864 | nameIReg(4,regindex), scale, |
| 1865 | nameIReg(4,reg) ); |
| 1866 | } |
| 1867 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1868 | void VG_(emit_AMD_prefetch_reg) ( Int reg ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1869 | { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1870 | VG_(new_emit)(False, FlagsEmpty, FlagsEmpty); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1871 | VG_(emitB) ( 0x0F ); |
| 1872 | VG_(emitB) ( 0x0D ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1873 | emit_amode_regmem_reg ( reg, 1 /* 0 is prefetch; 1 is prefetchw */ ); |
| 1874 | if (dis) |
| 1875 | VG_(printf)("\n\t\tamd-prefetch (%s)\n", nameIReg(4,reg) ); |
| 1876 | } |
| 1877 | |
| 1878 | /*----------------------------------------------------*/ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1879 | /*--- Helper offset -> addr translation ---*/ |
| 1880 | /*----------------------------------------------------*/ |
| 1881 | |
| 1882 | /* Finds the baseBlock offset of a skin-specified helper. |
| 1883 | * Searches through compacts first, then non-compacts. */ |
| 1884 | Int VG_(helper_offset)(Addr a) |
| 1885 | { |
sewardj | 05bcdcb | 2003-05-18 10:05:38 +0000 | [diff] [blame] | 1886 | UInt i; |
njn | f4ce3d3 | 2003-02-10 10:17:26 +0000 | [diff] [blame] | 1887 | Char buf[100]; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1888 | |
| 1889 | for (i = 0; i < VG_(n_compact_helpers); i++) |
| 1890 | if (VG_(compact_helper_addrs)[i] == a) |
| 1891 | return VG_(compact_helper_offsets)[i]; |
| 1892 | for (i = 0; i < VG_(n_noncompact_helpers); i++) |
| 1893 | if (VG_(noncompact_helper_addrs)[i] == a) |
| 1894 | return VG_(noncompact_helper_offsets)[i]; |
| 1895 | |
| 1896 | /* Shouldn't get here */ |
njn | f4ce3d3 | 2003-02-10 10:17:26 +0000 | [diff] [blame] | 1897 | VG_(get_fnname) ( a, buf, 100 ); |
| 1898 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1899 | VG_(printf)( |
njn | f4ce3d3 | 2003-02-10 10:17:26 +0000 | [diff] [blame] | 1900 | "\nCouldn't find offset of helper from its address (%p: %s).\n" |
| 1901 | "A helper function probably used hasn't been registered?\n\n", a, buf); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1902 | |
| 1903 | VG_(printf)(" compact helpers: "); |
| 1904 | for (i = 0; i < VG_(n_compact_helpers); i++) |
| 1905 | VG_(printf)("%p ", VG_(compact_helper_addrs)[i]); |
| 1906 | |
| 1907 | VG_(printf)("\n non-compact helpers: "); |
| 1908 | for (i = 0; i < VG_(n_noncompact_helpers); i++) |
| 1909 | VG_(printf)("%p ", VG_(noncompact_helper_addrs)[i]); |
| 1910 | |
| 1911 | VG_(printf)("\n"); |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 1912 | VG_(skin_panic)("Unfound helper"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1913 | } |
| 1914 | |
| 1915 | /*----------------------------------------------------*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1916 | /*--- Instruction synthesisers ---*/ |
| 1917 | /*----------------------------------------------------*/ |
| 1918 | |
| 1919 | static Condcode invertCondition ( Condcode cond ) |
| 1920 | { |
| 1921 | return (Condcode)(1 ^ (UInt)cond); |
| 1922 | } |
| 1923 | |
| 1924 | |
| 1925 | /* Synthesise a call to *baseBlock[offset], ie, |
| 1926 | call * (4 x offset)(%ebp). |
| 1927 | */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1928 | void VG_(synth_call) ( Bool ensure_shortform, Int word_offset, |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1929 | Bool simd_flags, FlagSet use_flags, FlagSet set_flags ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1930 | { |
| 1931 | vg_assert(word_offset >= 0); |
| 1932 | vg_assert(word_offset < VG_BASEBLOCK_WORDS); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1933 | if (ensure_shortform) { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1934 | vg_assert(word_offset < 32); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 1935 | } |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 1936 | emit_call_star_EBP_off ( simd_flags, 4 * word_offset, use_flags, set_flags ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1937 | } |
| 1938 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1939 | static void maybe_emit_movl_reg_reg ( UInt src, UInt dst ) |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 1940 | { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1941 | if (src != dst) { |
| 1942 | VG_(emit_movv_reg_reg) ( 4, src, dst ); |
| 1943 | ccall_arg_setup_instrs++; |
| 1944 | } |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 1945 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1946 | |
| 1947 | /* 'maybe' because it is sometimes skipped eg. for "movl %eax,%eax" */ |
| 1948 | static void maybe_emit_movl_litOrReg_reg ( UInt litOrReg, Tag tag, UInt reg ) |
| 1949 | { |
| 1950 | if (RealReg == tag) { |
| 1951 | maybe_emit_movl_reg_reg ( litOrReg, reg ); |
| 1952 | } else if (Literal == tag) { |
| 1953 | VG_(emit_movv_lit_reg) ( 4, litOrReg, reg ); |
| 1954 | ccall_arg_setup_instrs++; |
| 1955 | } |
| 1956 | else |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 1957 | VG_(core_panic)("emit_movl_litOrReg_reg: unexpected tag"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1958 | } |
| 1959 | |
| 1960 | static |
| 1961 | void emit_swapl_arg_regs ( UInt reg1, UInt reg2 ) |
| 1962 | { |
| 1963 | if (R_EAX == reg1) { |
| 1964 | VG_(emit_swapl_reg_EAX) ( reg2 ); |
| 1965 | } else if (R_EAX == reg2) { |
| 1966 | VG_(emit_swapl_reg_EAX) ( reg1 ); |
| 1967 | } else { |
| 1968 | emit_swapl_reg_reg ( reg1, reg2 ); |
| 1969 | } |
| 1970 | ccall_arg_setup_instrs++; |
| 1971 | } |
| 1972 | |
| 1973 | static |
| 1974 | void emit_two_regs_args_setup ( UInt src1, UInt src2, UInt dst1, UInt dst2) |
| 1975 | { |
| 1976 | if (dst1 != src2) { |
| 1977 | maybe_emit_movl_reg_reg ( src1, dst1 ); |
| 1978 | maybe_emit_movl_reg_reg ( src2, dst2 ); |
| 1979 | |
| 1980 | } else if (dst2 != src1) { |
| 1981 | maybe_emit_movl_reg_reg ( src2, dst2 ); |
| 1982 | maybe_emit_movl_reg_reg ( src1, dst1 ); |
| 1983 | |
| 1984 | } else { |
| 1985 | /* swap to break cycle */ |
| 1986 | emit_swapl_arg_regs ( dst1, dst2 ); |
| 1987 | } |
| 1988 | } |
| 1989 | |
| 1990 | static |
| 1991 | void emit_three_regs_args_setup ( UInt src1, UInt src2, UInt src3, |
| 1992 | UInt dst1, UInt dst2, UInt dst3) |
| 1993 | { |
| 1994 | if (dst1 != src2 && dst1 != src3) { |
| 1995 | maybe_emit_movl_reg_reg ( src1, dst1 ); |
| 1996 | emit_two_regs_args_setup ( src2, src3, dst2, dst3 ); |
| 1997 | |
| 1998 | } else if (dst2 != src1 && dst2 != src3) { |
| 1999 | maybe_emit_movl_reg_reg ( src2, dst2 ); |
| 2000 | emit_two_regs_args_setup ( src1, src3, dst1, dst3 ); |
| 2001 | |
| 2002 | } else if (dst3 != src1 && dst3 != src2) { |
| 2003 | maybe_emit_movl_reg_reg ( src3, dst3 ); |
| 2004 | emit_two_regs_args_setup ( src1, src2, dst1, dst2 ); |
| 2005 | |
| 2006 | } else { |
| 2007 | /* break cycle */ |
| 2008 | if (dst1 == src2 && dst2 == src3 && dst3 == src1) { |
| 2009 | emit_swapl_arg_regs ( dst1, dst2 ); |
| 2010 | emit_swapl_arg_regs ( dst1, dst3 ); |
| 2011 | |
| 2012 | } else if (dst1 == src3 && dst2 == src1 && dst3 == src2) { |
| 2013 | emit_swapl_arg_regs ( dst1, dst3 ); |
| 2014 | emit_swapl_arg_regs ( dst1, dst2 ); |
| 2015 | |
| 2016 | } else { |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2017 | VG_(core_panic)("impossible 3-cycle"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2018 | } |
| 2019 | } |
| 2020 | } |
| 2021 | |
| 2022 | static |
| 2023 | void emit_two_regs_or_lits_args_setup ( UInt argv[], Tag tagv[], |
| 2024 | UInt src1, UInt src2, |
| 2025 | UInt dst1, UInt dst2) |
| 2026 | { |
| 2027 | /* If either are lits, order doesn't matter */ |
| 2028 | if (Literal == tagv[src1] || Literal == tagv[src2]) { |
| 2029 | maybe_emit_movl_litOrReg_reg ( argv[src1], tagv[src1], dst1 ); |
| 2030 | maybe_emit_movl_litOrReg_reg ( argv[src2], tagv[src2], dst2 ); |
| 2031 | |
| 2032 | } else { |
| 2033 | emit_two_regs_args_setup ( argv[src1], argv[src2], dst1, dst2 ); |
| 2034 | } |
| 2035 | } |
| 2036 | |
| 2037 | static |
| 2038 | void emit_three_regs_or_lits_args_setup ( UInt argv[], Tag tagv[], |
| 2039 | UInt src1, UInt src2, UInt src3, |
| 2040 | UInt dst1, UInt dst2, UInt dst3) |
| 2041 | { |
| 2042 | // SSS: fix this eventually -- make STOREV use two RealRegs? |
| 2043 | /* Not supporting literals for 3-arg C functions -- they're only used |
| 2044 | by STOREV which has 2 args */ |
| 2045 | vg_assert(RealReg == tagv[src1] && |
| 2046 | RealReg == tagv[src2] && |
| 2047 | RealReg == tagv[src3]); |
| 2048 | emit_three_regs_args_setup ( argv[src1], argv[src2], argv[src3], |
| 2049 | dst1, dst2, dst3 ); |
| 2050 | } |
| 2051 | |
| 2052 | /* Synthesise a call to a C function `fn' (which must be registered in |
| 2053 | baseBlock) doing all the reg saving and arg handling work. |
| 2054 | |
| 2055 | WARNING: a UInstr should *not* be translated with synth_ccall followed |
| 2056 | by some other x86 assembly code; vg_liveness_analysis() doesn't expect |
| 2057 | such behaviour and everything will fall over. |
| 2058 | */ |
| 2059 | void VG_(synth_ccall) ( Addr fn, Int argc, Int regparms_n, UInt argv[], |
| 2060 | Tag tagv[], Int ret_reg, |
| 2061 | RRegSet regs_live_before, RRegSet regs_live_after ) |
| 2062 | { |
| 2063 | Int i; |
| 2064 | Int stack_used = 0; |
| 2065 | Bool preserve_eax, preserve_ecx, preserve_edx; |
| 2066 | |
| 2067 | vg_assert(0 <= regparms_n && regparms_n <= 3); |
| 2068 | |
| 2069 | ccalls++; |
| 2070 | |
| 2071 | /* If %e[acd]x is live before and after the C call, save/restore it. |
| 2072 | Unless the return values clobbers the reg; in this case we must not |
| 2073 | save/restore the reg, because the restore would clobber the return |
| 2074 | value. (Before and after the UInstr really constitute separate live |
| 2075 | ranges, but you miss this if you don't consider what happens during |
| 2076 | the UInstr.) */ |
| 2077 | # define PRESERVE_REG(realReg) \ |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 2078 | (IS_RREG_LIVE(VG_(realreg_to_rank)(realReg), regs_live_before) && \ |
| 2079 | IS_RREG_LIVE(VG_(realreg_to_rank)(realReg), regs_live_after) && \ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2080 | ret_reg != realReg) |
| 2081 | |
| 2082 | preserve_eax = PRESERVE_REG(R_EAX); |
| 2083 | preserve_ecx = PRESERVE_REG(R_ECX); |
| 2084 | preserve_edx = PRESERVE_REG(R_EDX); |
| 2085 | |
| 2086 | # undef PRESERVE_REG |
| 2087 | |
| 2088 | /* Save caller-save regs as required */ |
| 2089 | if (preserve_eax) { VG_(emit_pushv_reg) ( 4, R_EAX ); ccall_reg_saves++; } |
| 2090 | if (preserve_ecx) { VG_(emit_pushv_reg) ( 4, R_ECX ); ccall_reg_saves++; } |
| 2091 | if (preserve_edx) { VG_(emit_pushv_reg) ( 4, R_EDX ); ccall_reg_saves++; } |
| 2092 | |
| 2093 | /* Args are passed in two groups: (a) via stack (b) via regs. regparms_n |
| 2094 | is the number of args passed in regs (maximum 3 for GCC on x86). */ |
| 2095 | |
| 2096 | ccall_args += argc; |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 2097 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2098 | /* First push stack args (RealRegs or Literals) in reverse order. */ |
| 2099 | for (i = argc-1; i >= regparms_n; i--) { |
| 2100 | switch (tagv[i]) { |
| 2101 | case RealReg: |
| 2102 | VG_(emit_pushv_reg) ( 4, argv[i] ); |
| 2103 | break; |
| 2104 | case Literal: |
| 2105 | /* Use short form of pushl if possible. */ |
| 2106 | if (argv[i] == VG_(extend_s_8to32) ( argv[i] )) |
| 2107 | VG_(emit_pushl_lit8) ( VG_(extend_s_8to32)(argv[i]) ); |
| 2108 | else |
| 2109 | VG_(emit_pushl_lit32)( argv[i] ); |
| 2110 | break; |
| 2111 | default: |
| 2112 | VG_(printf)("tag=%d\n", tagv[i]); |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2113 | VG_(core_panic)("VG_(synth_ccall): bad tag"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2114 | } |
| 2115 | stack_used += 4; |
| 2116 | ccall_arg_setup_instrs++; |
| 2117 | } |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 2118 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2119 | /* Then setup args in registers (arg[123] --> %e[adc]x; note order!). |
| 2120 | If moving values between registers, be careful not to clobber any on |
| 2121 | the way. Happily we can use xchgl to swap registers. |
| 2122 | */ |
| 2123 | switch (regparms_n) { |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 2124 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2125 | /* Trickiest. Args passed in %eax, %edx, and %ecx. */ |
| 2126 | case 3: |
| 2127 | emit_three_regs_or_lits_args_setup ( argv, tagv, 0, 1, 2, |
| 2128 | R_EAX, R_EDX, R_ECX ); |
| 2129 | break; |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 2130 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2131 | /* Less-tricky. Args passed in %eax and %edx. */ |
| 2132 | case 2: |
| 2133 | emit_two_regs_or_lits_args_setup ( argv, tagv, 0, 1, R_EAX, R_EDX ); |
| 2134 | break; |
| 2135 | |
| 2136 | /* Easy. Just move arg1 into %eax (if not already in there). */ |
| 2137 | case 1: |
| 2138 | maybe_emit_movl_litOrReg_reg ( argv[0], tagv[0], R_EAX ); |
| 2139 | break; |
| 2140 | |
| 2141 | case 0: |
| 2142 | break; |
| 2143 | |
| 2144 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2145 | VG_(core_panic)("VG_(synth_call): regparms_n value not in range 0..3"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2146 | } |
| 2147 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2148 | /* Call the function - may trash all flags */ |
| 2149 | VG_(synth_call) ( False, VG_(helper_offset) ( fn ), False, FlagsEmpty, FlagsOSZACP ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2150 | |
| 2151 | /* Clear any args from stack */ |
| 2152 | if (0 != stack_used) { |
| 2153 | VG_(emit_add_lit_to_esp) ( stack_used ); |
| 2154 | ccall_stack_clears++; |
| 2155 | } |
| 2156 | |
| 2157 | /* Move return value into ret_reg if necessary and not already there */ |
| 2158 | if (INVALID_REALREG != ret_reg) { |
| 2159 | ccall_retvals++; |
| 2160 | if (R_EAX != ret_reg) { |
| 2161 | VG_(emit_movv_reg_reg) ( 4, R_EAX, ret_reg ); |
| 2162 | ccall_retval_movs++; |
| 2163 | } |
| 2164 | } |
| 2165 | |
| 2166 | /* Restore live caller-save regs as required */ |
| 2167 | if (preserve_edx) VG_(emit_popv_reg) ( 4, R_EDX ); |
| 2168 | if (preserve_ecx) VG_(emit_popv_reg) ( 4, R_ECX ); |
| 2169 | if (preserve_eax) VG_(emit_popv_reg) ( 4, R_EAX ); |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 2170 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2171 | |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2172 | static void load_ebp_from_JmpKind ( JmpKind jmpkind ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2173 | { |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2174 | switch (jmpkind) { |
| 2175 | case JmpBoring: |
| 2176 | break; |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2177 | case JmpRet: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2178 | break; |
| 2179 | case JmpCall: |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2180 | break; |
| 2181 | case JmpSyscall: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2182 | VG_(emit_movv_lit_reg) ( 4, VG_TRC_EBP_JMP_SYSCALL, R_EBP ); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2183 | break; |
| 2184 | case JmpClientReq: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2185 | VG_(emit_movv_lit_reg) ( 4, VG_TRC_EBP_JMP_CLIENTREQ, R_EBP ); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2186 | break; |
| 2187 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2188 | VG_(core_panic)("load_ebp_from_JmpKind"); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2189 | } |
| 2190 | } |
| 2191 | |
| 2192 | /* Jump to the next translation, by loading its original addr into |
| 2193 | %eax and returning to the scheduler. Signal special requirements |
| 2194 | by loading a special value into %ebp first. |
| 2195 | */ |
| 2196 | static void synth_jmp_reg ( Int reg, JmpKind jmpkind ) |
| 2197 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2198 | maybe_emit_put_eflags(); /* save flags here */ |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2199 | load_ebp_from_JmpKind ( jmpkind ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2200 | if (reg != R_EAX) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2201 | VG_(emit_movv_reg_reg) ( 4, reg, R_EAX ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2202 | emit_ret(); |
| 2203 | } |
| 2204 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 2205 | static void synth_mov_reg_offregmem ( Int size, Int reg, Int off, Int areg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2206 | |
| 2207 | /* Same deal as synth_jmp_reg. */ |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2208 | static void synth_jmp_lit ( Addr addr, JmpKind jmpkind ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2209 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2210 | maybe_emit_put_eflags(); /* save flags here */ |
| 2211 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2212 | VG_(emit_movv_lit_reg) ( 4, addr, R_EAX ); |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 2213 | |
| 2214 | if (VG_(clo_chain_bb) && (jmpkind == JmpBoring || jmpkind == JmpCall)) { |
| 2215 | synth_mov_reg_offregmem(4, R_EAX, 4*VGOFF_(m_eip), R_EBP); /* update EIP */ |
| 2216 | emit_call_patchme(); |
| 2217 | } else { |
| 2218 | load_ebp_from_JmpKind ( jmpkind ); |
| 2219 | emit_ret(); |
| 2220 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2221 | } |
| 2222 | |
| 2223 | |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2224 | static void synth_mov_offregmem_reg ( Int size, Int off, Int areg, Int reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2225 | static void synth_nonshiftop_lit_reg ( Bool simd_flags, |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2226 | Opcode opcode, Int size, |
| 2227 | UInt lit, Int reg ); |
| 2228 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2229 | static void synth_jcond_lit ( Condcode cond, |
| 2230 | Addr addr, |
| 2231 | Bool eax_trashable ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2232 | { |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2233 | UInt mask; |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2234 | Bool simd; |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2235 | Int tgt, tgt2, tgt_jump; |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2236 | |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2237 | VG_(init_target)(&tgt); |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2238 | VG_(init_target)(&tgt2); |
| 2239 | VG_(init_target)(&tgt_jump); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2240 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2241 | /* Ensure simulated %EFLAGS are up-to-date, by copying back %eflags |
| 2242 | if need be */ |
| 2243 | maybe_emit_put_eflags(); |
| 2244 | vg_assert(eflags_state == UPD_Both || eflags_state == UPD_Simd); |
| 2245 | |
| 2246 | if (eflags_state == UPD_Both) { |
| 2247 | /* The flags are already set up, so we just use them as is. */ |
| 2248 | simd = True; |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2249 | cond = invertCondition(cond); |
| 2250 | } else { |
sewardj | 75f0493 | 2002-12-12 23:13:21 +0000 | [diff] [blame] | 2251 | Bool parity = False; /* test Z or P */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2252 | |
| 2253 | /* The simd state contains the most recent version, so we emit a |
| 2254 | sequence to calculate the relevant condition directly out of |
| 2255 | the simd flags. This is much cheaper (on P3/P4/Athlon) than |
| 2256 | copying them back to the real flags via popf. Notice that |
| 2257 | some of these sequences trash %eax, but that should be free |
| 2258 | now since this is the end of a bb and therefore all regs are |
| 2259 | dead. */ |
| 2260 | simd = False; |
| 2261 | |
| 2262 | switch (cond) { |
| 2263 | |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2264 | case CondLE: /* Z || S != O -> S || !P */ |
| 2265 | case CondNLE: /* !Z && S == O -> !S && P */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2266 | vg_assert(eax_trashable); |
| 2267 | |
| 2268 | VG_(emit_movv_offregmem_reg) |
| 2269 | ( 4, VGOFF_(m_eflags) * 4, R_EBP, R_EAX ); |
| 2270 | /* eax == %EFLAGS */ |
| 2271 | |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2272 | VG_(emit_nonshiftopv_lit_reg) |
| 2273 | ( False, 4, AND, EFlagO|EFlagS|EFlagZ, R_EAX ); |
| 2274 | /* eax just contains OF, SF and ZF */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2275 | |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2276 | VG_(emit_shiftopv_lit_reg)( False, 4, ROR, 7, R_EAX ); |
| 2277 | /* eax has OF and SF in lower 8 bits, and ZF in MSB */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2278 | |
sewardj | 0973662 | 2002-12-28 00:19:00 +0000 | [diff] [blame] | 2279 | /* actually set the real cpu flags, since ROR changes |
| 2280 | neither P nor Z */ |
| 2281 | VG_(emit_nonshiftopv_reg_reg)( False, 4, OR, R_EAX, R_EAX ); |
| 2282 | |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2283 | if (cond == CondLE) { |
| 2284 | /* test Z */ |
| 2285 | VG_(emit_jcondshort_target)(False, CondS, &tgt_jump); |
| 2286 | /* test OF != SF */ |
| 2287 | cond = CondP; |
| 2288 | } else { |
| 2289 | /* test Z */ |
| 2290 | VG_(emit_jcondshort_target)(False, CondS, &tgt2); |
| 2291 | /* test OF == SF */ |
| 2292 | cond = CondNP; |
| 2293 | } |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2294 | break; |
| 2295 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2296 | case CondL: |
| 2297 | case CondNL: |
sewardj | ac3414b | 2002-12-10 23:44:17 +0000 | [diff] [blame] | 2298 | vg_assert(eax_trashable); |
| 2299 | |
| 2300 | VG_(emit_movv_offregmem_reg) |
| 2301 | ( 4, VGOFF_(m_eflags) * 4, R_EBP, R_EAX ); |
| 2302 | /* eax == %EFLAGS */ |
| 2303 | |
sewardj | 75f0493 | 2002-12-12 23:13:21 +0000 | [diff] [blame] | 2304 | VG_(emit_shiftopv_lit_reg)( False, 4, SHR, 7, R_EAX ); |
| 2305 | /* eax has OF and SF in lower byte */ |
sewardj | ac3414b | 2002-12-10 23:44:17 +0000 | [diff] [blame] | 2306 | |
sewardj | 75f0493 | 2002-12-12 23:13:21 +0000 | [diff] [blame] | 2307 | VG_(emit_testb_lit_reg) ( False, 0x11, R_EAX); |
| 2308 | /* PF = OF == SF */ |
sewardj | ac3414b | 2002-12-10 23:44:17 +0000 | [diff] [blame] | 2309 | |
sewardj | 0973662 | 2002-12-28 00:19:00 +0000 | [diff] [blame] | 2310 | /* Testing P now is OK since SHR sets it */ |
sewardj | 75f0493 | 2002-12-12 23:13:21 +0000 | [diff] [blame] | 2311 | if (cond == CondL) cond = CondP; else cond = CondNP; |
| 2312 | break; |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2313 | |
| 2314 | case CondB: |
| 2315 | case CondNB: |
| 2316 | mask = EFlagC; goto simple; /* C=1 */ |
| 2317 | |
| 2318 | case CondZ: |
| 2319 | case CondNZ: |
| 2320 | mask = EFlagZ; goto simple; /* Z=1 */ |
| 2321 | |
| 2322 | case CondBE: |
| 2323 | case CondNBE: |
| 2324 | mask = EFlagC | EFlagZ; goto simple; /* C=1 || Z=1 */ |
| 2325 | |
| 2326 | case CondS: |
| 2327 | case CondNS: |
| 2328 | mask = EFlagS; goto simple; /* S=1 */ |
| 2329 | |
| 2330 | case CondP: |
sewardj | 06d3f8c | 2002-12-08 19:50:36 +0000 | [diff] [blame] | 2331 | case CondNP: |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2332 | mask = EFlagP; goto simple; /* P=1 */ |
| 2333 | |
sewardj | 3954207 | 2002-12-09 22:44:00 +0000 | [diff] [blame] | 2334 | case CondO: |
| 2335 | case CondNO: |
| 2336 | mask = EFlagO; goto simple; /* O=1 */ |
| 2337 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2338 | default: |
| 2339 | VG_(printf)("synth_jcond_lit: unhandled simd case %d (%s)\n", |
njn | 563f96f | 2003-02-03 11:17:46 +0000 | [diff] [blame] | 2340 | (Int)cond, VG_(name_UCondcode)(cond) ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2341 | VG_(core_panic)("synth_jcond_lit: unhandled simd case"); |
| 2342 | |
| 2343 | simple: |
| 2344 | VG_(new_emit)(False, False, FlagsOSZACP); |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2345 | if ((mask & 0xff) == mask) { |
| 2346 | VG_(emitB) ( 0xF6 ); /* Grp3 */ |
| 2347 | VG_(emit_amode_offregmem_reg)( |
| 2348 | VGOFF_(m_eflags) * 4, R_EBP, 0 /* subcode for TEST */); |
| 2349 | VG_(emitB) (mask); |
| 2350 | if (dis) |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2351 | VG_(printf)("\n\t\ttestb $0x%x, %d(%%ebp)\n", |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2352 | mask, VGOFF_(m_eflags) * 4); |
| 2353 | } else { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2354 | /* all cond codes are in lower 16 bits */ |
| 2355 | vg_assert((mask & 0xffff) == mask); |
| 2356 | |
| 2357 | VG_(emitB) ( 0x66 ); |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2358 | VG_(emitB) ( 0xF7 ); |
| 2359 | VG_(emit_amode_offregmem_reg)( |
| 2360 | VGOFF_(m_eflags) * 4, R_EBP, 0 /* subcode for TEST */); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2361 | VG_(emitW) (mask); |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2362 | if (dis) |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2363 | VG_(printf)("\n\t\ttestl $0x%x, %d(%%ebp)\n", |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2364 | mask, VGOFF_(m_eflags) * 4); |
| 2365 | } |
| 2366 | |
sewardj | 75f0493 | 2002-12-12 23:13:21 +0000 | [diff] [blame] | 2367 | cond = (parity ? CondP : CondZ) | (cond & 1); |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2368 | break; |
| 2369 | } |
| 2370 | } |
| 2371 | |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2372 | VG_(emit_jcondshort_target) ( simd, cond, &tgt ); |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2373 | |
| 2374 | VG_(target_forward)(&tgt_jump); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2375 | synth_jmp_lit ( addr, JmpBoring ); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2376 | |
| 2377 | VG_(target_forward)(&tgt); |
sewardj | bb6c118 | 2002-12-12 23:54:47 +0000 | [diff] [blame] | 2378 | VG_(target_forward)(&tgt2); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2379 | } |
| 2380 | |
| 2381 | |
sewardj | 2370f3b | 2002-11-30 15:01:01 +0000 | [diff] [blame] | 2382 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2383 | static void synth_jmp_ifzero_reg_lit ( Int reg, Addr addr ) |
| 2384 | { |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2385 | Int tgt; |
| 2386 | |
| 2387 | VG_(init_target)(&tgt); |
| 2388 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2389 | VG_(emit_cmpl_zero_reg) ( False, reg ); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2390 | |
| 2391 | VG_(emit_jcondshort_target) ( False, CondNZ, &tgt ); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 2392 | synth_jmp_lit ( addr, JmpBoring ); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2393 | |
| 2394 | VG_(target_forward)(&tgt); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2395 | } |
| 2396 | |
| 2397 | |
| 2398 | static void synth_mov_lit_reg ( Int size, UInt lit, Int reg ) |
| 2399 | { |
| 2400 | /* Load the zero-extended literal into reg, at size l, |
| 2401 | regardless of the request size. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2402 | VG_(emit_movv_lit_reg) ( 4, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2403 | } |
| 2404 | |
| 2405 | |
| 2406 | static void synth_mov_regmem_reg ( Int size, Int reg1, Int reg2 ) |
| 2407 | { |
| 2408 | switch (size) { |
| 2409 | case 4: emit_movv_regmem_reg ( 4, reg1, reg2 ); break; |
| 2410 | case 2: emit_movzwl_regmem_reg ( reg1, reg2 ); break; |
| 2411 | case 1: emit_movzbl_regmem_reg ( reg1, reg2 ); break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2412 | default: VG_(core_panic)("synth_mov_regmem_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2413 | } |
| 2414 | } |
| 2415 | |
| 2416 | |
| 2417 | static void synth_mov_offregmem_reg ( Int size, Int off, Int areg, Int reg ) |
| 2418 | { |
| 2419 | switch (size) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2420 | case 4: VG_(emit_movv_offregmem_reg) ( 4, off, areg, reg ); break; |
| 2421 | case 2: VG_(emit_movzwl_offregmem_reg) ( off, areg, reg ); break; |
| 2422 | case 1: VG_(emit_movzbl_offregmem_reg) ( off, areg, reg ); break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2423 | default: VG_(core_panic)("synth_mov_offregmem_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2424 | } |
| 2425 | } |
| 2426 | |
| 2427 | |
| 2428 | static void synth_mov_reg_offregmem ( Int size, Int reg, |
| 2429 | Int off, Int areg ) |
| 2430 | { |
| 2431 | switch (size) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2432 | case 4: VG_(emit_movv_reg_offregmem) ( 4, reg, off, areg ); break; |
| 2433 | case 2: VG_(emit_movv_reg_offregmem) ( 2, reg, off, areg ); break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2434 | case 1: if (reg < 4) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2435 | VG_(emit_movb_reg_offregmem) ( reg, off, areg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2436 | } |
| 2437 | else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2438 | VG_(emit_swapl_reg_EAX) ( reg ); |
| 2439 | VG_(emit_movb_reg_offregmem) ( R_AL, off, areg ); |
| 2440 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2441 | } |
| 2442 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2443 | default: VG_(core_panic)("synth_mov_reg_offregmem"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2444 | } |
| 2445 | } |
| 2446 | |
| 2447 | |
| 2448 | static void synth_mov_reg_memreg ( Int size, Int reg1, Int reg2 ) |
| 2449 | { |
| 2450 | Int s1; |
| 2451 | switch (size) { |
| 2452 | case 4: emit_movv_reg_regmem ( 4, reg1, reg2 ); break; |
| 2453 | case 2: emit_movv_reg_regmem ( 2, reg1, reg2 ); break; |
| 2454 | case 1: if (reg1 < 4) { |
| 2455 | emit_movb_reg_regmem ( reg1, reg2 ); |
| 2456 | } |
| 2457 | else { |
| 2458 | /* Choose a swap reg which is < 4 and not reg1 or reg2. */ |
| 2459 | for (s1 = 0; s1 == reg1 || s1 == reg2; s1++) ; |
| 2460 | emit_swapl_reg_reg ( s1, reg1 ); |
| 2461 | emit_movb_reg_regmem ( s1, reg2 ); |
| 2462 | emit_swapl_reg_reg ( s1, reg1 ); |
| 2463 | } |
| 2464 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2465 | default: VG_(core_panic)("synth_mov_reg_litmem"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2466 | } |
| 2467 | } |
| 2468 | |
| 2469 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2470 | static void synth_unaryop_reg ( Bool simd_flags, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2471 | Opcode opcode, Int size, |
| 2472 | Int reg ) |
| 2473 | { |
| 2474 | /* NB! opcode is a uinstr opcode, not an x86 one! */ |
| 2475 | switch (size) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2476 | case 4: VG_(emit_unaryopv_reg) ( simd_flags, 4, opcode, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2477 | break; |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2478 | case 2: VG_(emit_unaryopv_reg) ( simd_flags, 2, opcode, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2479 | break; |
| 2480 | case 1: if (reg < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2481 | VG_(emit_unaryopb_reg) ( simd_flags, opcode, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2482 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2483 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2484 | VG_(emit_unaryopb_reg) ( simd_flags, opcode, R_AL ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2485 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2486 | } |
| 2487 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2488 | default: VG_(core_panic)("synth_unaryop_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2489 | } |
| 2490 | } |
| 2491 | |
| 2492 | |
| 2493 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2494 | static void synth_nonshiftop_reg_reg ( Bool simd_flags, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2495 | Opcode opcode, Int size, |
| 2496 | Int reg1, Int reg2 ) |
| 2497 | { |
| 2498 | /* NB! opcode is a uinstr opcode, not an x86 one! */ |
| 2499 | switch (size) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2500 | case 4: VG_(emit_nonshiftopv_reg_reg) ( simd_flags, 4, opcode, reg1, reg2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2501 | break; |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2502 | case 2: VG_(emit_nonshiftopv_reg_reg) ( simd_flags, 2, opcode, reg1, reg2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2503 | break; |
| 2504 | case 1: { /* Horrible ... */ |
| 2505 | Int s1, s2; |
| 2506 | /* Choose s1 and s2 to be x86 regs which we can talk about the |
| 2507 | lowest 8 bits, ie either %eax, %ebx, %ecx or %edx. Make |
| 2508 | sure s1 != s2 and that neither of them equal either reg1 or |
| 2509 | reg2. Then use them as temporaries to make things work. */ |
| 2510 | if (reg1 < 4 && reg2 < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2511 | emit_nonshiftopb_reg_reg(simd_flags, opcode, reg1, reg2); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2512 | break; |
| 2513 | } |
| 2514 | for (s1 = 0; s1 == reg1 || s1 == reg2; s1++) ; |
| 2515 | if (reg1 >= 4 && reg2 < 4) { |
| 2516 | emit_swapl_reg_reg ( reg1, s1 ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2517 | emit_nonshiftopb_reg_reg(simd_flags, opcode, s1, reg2); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2518 | emit_swapl_reg_reg ( reg1, s1 ); |
| 2519 | break; |
| 2520 | } |
| 2521 | for (s2 = 0; s2 == reg1 || s2 == reg2 || s2 == s1; s2++) ; |
| 2522 | if (reg1 < 4 && reg2 >= 4) { |
| 2523 | emit_swapl_reg_reg ( reg2, s2 ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2524 | emit_nonshiftopb_reg_reg(simd_flags, opcode, reg1, s2); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2525 | emit_swapl_reg_reg ( reg2, s2 ); |
| 2526 | break; |
| 2527 | } |
| 2528 | if (reg1 >= 4 && reg2 >= 4 && reg1 != reg2) { |
| 2529 | emit_swapl_reg_reg ( reg1, s1 ); |
| 2530 | emit_swapl_reg_reg ( reg2, s2 ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2531 | emit_nonshiftopb_reg_reg(simd_flags, opcode, s1, s2); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2532 | emit_swapl_reg_reg ( reg1, s1 ); |
| 2533 | emit_swapl_reg_reg ( reg2, s2 ); |
| 2534 | break; |
| 2535 | } |
| 2536 | if (reg1 >= 4 && reg2 >= 4 && reg1 == reg2) { |
| 2537 | emit_swapl_reg_reg ( reg1, s1 ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2538 | emit_nonshiftopb_reg_reg(simd_flags, opcode, s1, s1); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2539 | emit_swapl_reg_reg ( reg1, s1 ); |
| 2540 | break; |
| 2541 | } |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2542 | VG_(core_panic)("synth_nonshiftopb_reg_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2543 | } |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2544 | default: VG_(core_panic)("synth_nonshiftop_reg_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2545 | } |
| 2546 | } |
| 2547 | |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 2548 | #if 0 |
| 2549 | /* evidently unused */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2550 | static void synth_nonshiftop_reg_offregmem ( |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2551 | Bool simd_flags, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2552 | Opcode opcode, Int size, |
| 2553 | Int off, Int areg, Int reg ) |
| 2554 | { |
| 2555 | switch (size) { |
| 2556 | case 4: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2557 | emit_nonshiftopv_reg_offregmem ( simd_flags, 4, opcode, off, areg, reg ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2558 | break; |
| 2559 | case 2: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2560 | emit_nonshiftopv_reg_offregmem ( simd_flags, 2, opcode, off, areg, reg ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2561 | break; |
| 2562 | case 1: |
| 2563 | if (reg < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2564 | emit_nonshiftopb_reg_offregmem ( simd_flags, opcode, off, areg, reg ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2565 | } else { |
| 2566 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2567 | emit_nonshiftopb_reg_offregmem ( simd_flags, opcode, off, areg, R_AL ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2568 | VG_(emit_swapl_reg_EAX) ( reg ); |
| 2569 | } |
| 2570 | break; |
| 2571 | default: |
| 2572 | VG_(core_panic)("synth_nonshiftop_reg_offregmem"); |
| 2573 | } |
| 2574 | } |
sewardj | a2c5a73 | 2002-12-15 03:10:42 +0000 | [diff] [blame] | 2575 | #endif |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2576 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2577 | static void synth_nonshiftop_offregmem_reg ( |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2578 | Bool simd_flags, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2579 | Opcode opcode, Int size, |
| 2580 | Int off, Int areg, Int reg ) |
| 2581 | { |
| 2582 | switch (size) { |
| 2583 | case 4: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2584 | emit_nonshiftopv_offregmem_reg ( simd_flags, 4, opcode, off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2585 | break; |
| 2586 | case 2: |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2587 | emit_nonshiftopv_offregmem_reg ( simd_flags, 2, opcode, off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2588 | break; |
| 2589 | case 1: |
| 2590 | if (reg < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2591 | emit_nonshiftopb_offregmem_reg ( simd_flags, opcode, off, areg, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2592 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2593 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2594 | emit_nonshiftopb_offregmem_reg ( simd_flags, opcode, off, areg, R_AL ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2595 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2596 | } |
| 2597 | break; |
| 2598 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2599 | VG_(core_panic)("synth_nonshiftop_offregmem_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2600 | } |
| 2601 | } |
| 2602 | |
| 2603 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2604 | static void synth_nonshiftop_lit_reg ( Bool simd_flags, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2605 | Opcode opcode, Int size, |
| 2606 | UInt lit, Int reg ) |
| 2607 | { |
| 2608 | switch (size) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2609 | case 4: VG_(emit_nonshiftopv_lit_reg) ( simd_flags, 4, opcode, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2610 | break; |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2611 | case 2: VG_(emit_nonshiftopv_lit_reg) ( simd_flags, 2, opcode, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2612 | break; |
| 2613 | case 1: if (reg < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2614 | emit_nonshiftopb_lit_reg ( simd_flags, opcode, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2615 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2616 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2617 | emit_nonshiftopb_lit_reg ( simd_flags, opcode, lit, R_AL ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2618 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2619 | } |
| 2620 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2621 | default: VG_(core_panic)("synth_nonshiftop_lit_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2622 | } |
| 2623 | } |
| 2624 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2625 | static void synth_nonshiftop_lit_offregmem ( Bool simd_flags, |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2626 | Opcode opcode, Int size, |
| 2627 | UInt lit, Int off, Int regmem ) |
| 2628 | { |
| 2629 | switch (size) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2630 | case 4: VG_(emit_nonshiftopv_lit_offregmem) ( simd_flags, 4, opcode, lit, off, regmem ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2631 | break; |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2632 | case 2: VG_(emit_nonshiftopv_lit_offregmem) ( simd_flags, 2, opcode, lit, off, regmem ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2633 | break; |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2634 | case 1: emit_nonshiftopb_lit_offregmem ( simd_flags, opcode, lit, off, regmem ); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2635 | break; |
| 2636 | default: VG_(core_panic)("synth_nonshiftop_lit_offregmem"); |
| 2637 | } |
| 2638 | } |
| 2639 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2640 | |
| 2641 | static void synth_push_reg ( Int size, Int reg ) |
| 2642 | { |
| 2643 | switch (size) { |
| 2644 | case 4: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2645 | VG_(emit_pushv_reg) ( 4, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2646 | break; |
| 2647 | case 2: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2648 | VG_(emit_pushv_reg) ( 2, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2649 | break; |
| 2650 | /* Pray that we don't have to generate this really cruddy bit of |
| 2651 | code very often. Could do better, but can I be bothered? */ |
| 2652 | case 1: |
| 2653 | vg_assert(reg != R_ESP); /* duh */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2654 | VG_(emit_add_lit_to_esp)(-1); |
| 2655 | if (reg != R_EAX) VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2656 | emit_movb_AL_zeroESPmem(); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2657 | if (reg != R_EAX) VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2658 | break; |
| 2659 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2660 | VG_(core_panic)("synth_push_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2661 | } |
| 2662 | } |
| 2663 | |
| 2664 | |
| 2665 | static void synth_pop_reg ( Int size, Int reg ) |
| 2666 | { |
| 2667 | switch (size) { |
| 2668 | case 4: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2669 | VG_(emit_popv_reg) ( 4, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2670 | break; |
| 2671 | case 2: |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2672 | VG_(emit_popv_reg) ( 2, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2673 | break; |
| 2674 | case 1: |
| 2675 | /* Same comment as above applies. */ |
| 2676 | vg_assert(reg != R_ESP); /* duh */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2677 | if (reg != R_EAX) VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2678 | emit_movb_zeroESPmem_AL(); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2679 | if (reg != R_EAX) VG_(emit_swapl_reg_EAX) ( reg ); |
| 2680 | VG_(emit_add_lit_to_esp)(1); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2681 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2682 | default: VG_(core_panic)("synth_pop_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2683 | } |
| 2684 | } |
| 2685 | |
| 2686 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2687 | static void synth_shiftop_reg_reg ( Bool simd_flags, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2688 | Opcode opcode, Int size, |
| 2689 | Int regs, Int regd ) |
| 2690 | { |
| 2691 | synth_push_reg ( size, regd ); |
| 2692 | if (regs != R_ECX) emit_swapl_reg_ECX ( regs ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2693 | switch (size) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2694 | case 4: emit_shiftopv_cl_stack0 ( simd_flags, 4, opcode ); break; |
| 2695 | case 2: emit_shiftopv_cl_stack0 ( simd_flags, 2, opcode ); break; |
| 2696 | case 1: emit_shiftopb_cl_stack0 ( simd_flags, opcode ); break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2697 | default: VG_(core_panic)("synth_shiftop_reg_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2698 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2699 | if (regs != R_ECX) emit_swapl_reg_ECX ( regs ); |
| 2700 | synth_pop_reg ( size, regd ); |
| 2701 | } |
| 2702 | |
| 2703 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2704 | static void synth_shiftop_lit_reg ( Bool simd_flags, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2705 | Opcode opcode, Int size, |
| 2706 | UInt lit, Int reg ) |
| 2707 | { |
| 2708 | switch (size) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2709 | case 4: VG_(emit_shiftopv_lit_reg) ( simd_flags, 4, opcode, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2710 | break; |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2711 | case 2: VG_(emit_shiftopv_lit_reg) ( simd_flags, 2, opcode, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2712 | break; |
| 2713 | case 1: if (reg < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2714 | emit_shiftopb_lit_reg ( simd_flags, opcode, lit, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2715 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2716 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2717 | emit_shiftopb_lit_reg ( simd_flags, opcode, lit, R_AL ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2718 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2719 | } |
| 2720 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2721 | default: VG_(core_panic)("synth_shiftop_lit_reg"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2722 | } |
| 2723 | } |
| 2724 | |
| 2725 | |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2726 | static void synth_setb_reg ( Bool simd, Int reg, Condcode cond ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2727 | { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2728 | if (reg < 4) { |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2729 | emit_setb_reg ( simd, reg, cond ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2730 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2731 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 2732 | emit_setb_reg ( simd, R_AL, cond ); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2733 | VG_(emit_swapl_reg_EAX) ( reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2734 | } |
| 2735 | } |
| 2736 | |
| 2737 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 2738 | static void synth_MMX2_regmem ( Bool uses_flags, Bool sets_flags, |
| 2739 | UChar first_byte, |
| 2740 | UChar second_byte, |
| 2741 | Int ireg ) |
| 2742 | { |
| 2743 | emit_MMX2_regmem ( uses_flags, sets_flags, |
| 2744 | first_byte, second_byte, ireg ); |
| 2745 | } |
| 2746 | |
| 2747 | |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 2748 | static void synth_MMX2_reg_to_mmxreg ( Bool uses_flags, Bool sets_flags, |
| 2749 | UChar first_byte, |
| 2750 | UChar second_byte, |
| 2751 | Int ireg ) |
| 2752 | { |
| 2753 | emit_MMX2_reg_to_mmxreg ( uses_flags, sets_flags, |
| 2754 | first_byte, second_byte, ireg ); |
| 2755 | } |
| 2756 | |
sewardj | d1c9e43 | 2003-04-04 20:40:34 +0000 | [diff] [blame] | 2757 | static void synth_MMX2_mmxreg_to_reg ( Bool uses_flags, Bool sets_flags, |
| 2758 | UChar first_byte, |
| 2759 | UChar second_byte, |
| 2760 | Int ireg ) |
| 2761 | { |
| 2762 | emit_MMX2_mmxreg_to_reg ( uses_flags, sets_flags, |
| 2763 | first_byte, second_byte, ireg ); |
| 2764 | } |
| 2765 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 2766 | static void synth_MMX2_no_mem ( Bool uses_flags, Bool sets_flags, |
| 2767 | UChar first_byte, |
| 2768 | UChar second_byte ) |
| 2769 | { |
| 2770 | emit_MMX2_no_mem ( uses_flags, sets_flags, first_byte, second_byte ); |
| 2771 | } |
| 2772 | |
| 2773 | |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 2774 | static void synth_MMX3_no_mem ( Bool uses_flags, Bool sets_flags, |
| 2775 | UChar first_byte, |
| 2776 | UChar second_byte, |
| 2777 | UChar third_byte ) |
| 2778 | { |
| 2779 | emit_MMX3_no_mem ( uses_flags, sets_flags, |
| 2780 | first_byte, second_byte, third_byte ); |
| 2781 | } |
| 2782 | |
| 2783 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 2784 | static void synth_MMX1_no_mem ( Bool uses_flags, Bool sets_flags, |
| 2785 | UChar first_byte ) |
| 2786 | { |
| 2787 | emit_MMX1_no_mem ( uses_flags, sets_flags, first_byte ); |
| 2788 | } |
| 2789 | |
| 2790 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2791 | static void synth_fpu_regmem ( Bool uses_flags, Bool sets_flags, |
| 2792 | UChar first_byte, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2793 | UChar second_byte_masked, |
| 2794 | Int reg ) |
| 2795 | { |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 2796 | emit_fpu_regmem ( uses_flags, sets_flags, |
| 2797 | first_byte, second_byte_masked, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2798 | } |
| 2799 | |
| 2800 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2801 | static void synth_fpu_no_mem ( Bool uses_flags, Bool sets_flags, |
| 2802 | UChar first_byte, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2803 | UChar second_byte ) |
| 2804 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 2805 | emit_fpu_no_mem ( uses_flags, sets_flags, first_byte, second_byte ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2806 | } |
| 2807 | |
| 2808 | |
| 2809 | static void synth_movl_reg_reg ( Int src, Int dst ) |
| 2810 | { |
| 2811 | emit_movl_reg_reg ( src, dst ); |
| 2812 | } |
| 2813 | |
| 2814 | static void synth_cmovl_reg_reg ( Condcode cond, Int src, Int dst ) |
| 2815 | { |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2816 | Int tgt; |
| 2817 | |
| 2818 | VG_(init_target)(&tgt); |
| 2819 | |
| 2820 | VG_(emit_jcondshort_target) ( True, invertCondition(cond), &tgt); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2821 | emit_movl_reg_reg ( src, dst ); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 2822 | |
| 2823 | VG_(target_forward)(&tgt); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2824 | } |
| 2825 | |
| 2826 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2827 | /*----------------------------------------------------*/ |
| 2828 | /*--- Top level of the uinstr -> x86 translation. ---*/ |
| 2829 | /*----------------------------------------------------*/ |
| 2830 | |
| 2831 | /* Return the byte offset from %ebp (ie, into baseBlock) |
| 2832 | for the specified ArchReg or SpillNo. */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2833 | static Int spillOrArchOffset ( Int size, Tag tag, UInt value ) |
| 2834 | { |
| 2835 | if (tag == SpillNo) { |
| 2836 | vg_assert(size == 4); |
| 2837 | vg_assert(value >= 0 && value < VG_MAX_SPILLSLOTS); |
| 2838 | return 4 * (value + VGOFF_(spillslots)); |
| 2839 | } |
| 2840 | if (tag == ArchReg) { |
| 2841 | switch (value) { |
| 2842 | case R_EAX: return 4 * VGOFF_(m_eax); |
| 2843 | case R_ECX: return 4 * VGOFF_(m_ecx); |
| 2844 | case R_EDX: return 4 * VGOFF_(m_edx); |
| 2845 | case R_EBX: return 4 * VGOFF_(m_ebx); |
| 2846 | case R_ESP: |
| 2847 | if (size == 1) return 4 * VGOFF_(m_eax) + 1; |
| 2848 | else return 4 * VGOFF_(m_esp); |
| 2849 | case R_EBP: |
| 2850 | if (size == 1) return 4 * VGOFF_(m_ecx) + 1; |
| 2851 | else return 4 * VGOFF_(m_ebp); |
| 2852 | case R_ESI: |
| 2853 | if (size == 1) return 4 * VGOFF_(m_edx) + 1; |
| 2854 | else return 4 * VGOFF_(m_esi); |
| 2855 | case R_EDI: |
| 2856 | if (size == 1) return 4 * VGOFF_(m_ebx) + 1; |
| 2857 | else return 4 * VGOFF_(m_edi); |
| 2858 | } |
| 2859 | } |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2860 | VG_(core_panic)("spillOrArchOffset"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2861 | } |
| 2862 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2863 | static Int eflagsOffset ( void ) |
| 2864 | { |
| 2865 | return 4 * VGOFF_(m_eflags); |
| 2866 | } |
| 2867 | |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 2868 | static Int segRegOffset ( UInt archregs ) |
| 2869 | { |
| 2870 | switch (archregs) { |
| 2871 | case R_CS: return 4 * VGOFF_(m_cs); |
| 2872 | case R_SS: return 4 * VGOFF_(m_ss); |
| 2873 | case R_DS: return 4 * VGOFF_(m_ds); |
| 2874 | case R_ES: return 4 * VGOFF_(m_es); |
| 2875 | case R_FS: return 4 * VGOFF_(m_fs); |
| 2876 | case R_GS: return 4 * VGOFF_(m_gs); |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 2877 | default: VG_(core_panic)("segRegOffset"); |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 2878 | } |
| 2879 | } |
| 2880 | |
njn | f4ce3d3 | 2003-02-10 10:17:26 +0000 | [diff] [blame] | 2881 | UInt VG_(get_archreg) ( UInt arch ) |
| 2882 | { |
| 2883 | switch (arch) { |
| 2884 | case R_EAX: return VG_(baseBlock)[ VGOFF_(m_eax) ]; |
| 2885 | case R_ECX: return VG_(baseBlock)[ VGOFF_(m_ecx) ]; |
| 2886 | case R_EDX: return VG_(baseBlock)[ VGOFF_(m_edx) ]; |
| 2887 | case R_EBX: return VG_(baseBlock)[ VGOFF_(m_ebx) ]; |
| 2888 | case R_ESP: return VG_(baseBlock)[ VGOFF_(m_esp) ]; |
| 2889 | case R_EBP: return VG_(baseBlock)[ VGOFF_(m_ebp) ]; |
| 2890 | case R_ESI: return VG_(baseBlock)[ VGOFF_(m_esi) ]; |
| 2891 | case R_EDI: return VG_(baseBlock)[ VGOFF_(m_edi) ]; |
| 2892 | default: VG_(core_panic)( "get_thread_archreg"); |
| 2893 | } |
| 2894 | } |
| 2895 | |
| 2896 | UInt VG_(get_thread_archreg) ( ThreadId tid, UInt arch ) |
| 2897 | { |
| 2898 | ThreadState* tst; |
| 2899 | |
| 2900 | vg_assert(VG_(is_valid_tid)(tid)); |
| 2901 | tst = & VG_(threads)[tid]; |
| 2902 | |
| 2903 | switch (arch) { |
| 2904 | case R_EAX: return tst->m_eax; |
| 2905 | case R_ECX: return tst->m_ecx; |
| 2906 | case R_EDX: return tst->m_edx; |
| 2907 | case R_EBX: return tst->m_ebx; |
| 2908 | case R_ESP: return tst->m_esp; |
| 2909 | case R_EBP: return tst->m_ebp; |
| 2910 | case R_ESI: return tst->m_esi; |
| 2911 | case R_EDI: return tst->m_edi; |
| 2912 | default: VG_(core_panic)( "get_thread_archreg"); |
| 2913 | } |
| 2914 | } |
| 2915 | |
njn | b93d178 | 2003-02-03 12:03:22 +0000 | [diff] [blame] | 2916 | /* Return the baseBlock index for the specified shadow register */ |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 2917 | static Int shadow_reg_index ( Int arch ) |
njn | b93d178 | 2003-02-03 12:03:22 +0000 | [diff] [blame] | 2918 | { |
| 2919 | switch (arch) { |
| 2920 | case R_EAX: return VGOFF_(sh_eax); |
| 2921 | case R_ECX: return VGOFF_(sh_ecx); |
| 2922 | case R_EDX: return VGOFF_(sh_edx); |
| 2923 | case R_EBX: return VGOFF_(sh_ebx); |
| 2924 | case R_ESP: return VGOFF_(sh_esp); |
| 2925 | case R_EBP: return VGOFF_(sh_ebp); |
| 2926 | case R_ESI: return VGOFF_(sh_esi); |
| 2927 | case R_EDI: return VGOFF_(sh_edi); |
| 2928 | default: VG_(core_panic)( "shadow_reg_index"); |
| 2929 | } |
| 2930 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2931 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2932 | /* Return the byte offset from %ebp (ie, into baseBlock) |
| 2933 | for the specified shadow register */ |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 2934 | Int VG_(shadow_reg_offset) ( Int arch ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2935 | { |
njn | b93d178 | 2003-02-03 12:03:22 +0000 | [diff] [blame] | 2936 | return 4 * shadow_reg_index ( arch ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2937 | } |
| 2938 | |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 2939 | Int VG_(shadow_flags_offset) ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 2940 | { |
| 2941 | return 4 * VGOFF_(sh_eflags); |
| 2942 | } |
| 2943 | |
njn | b93d178 | 2003-02-03 12:03:22 +0000 | [diff] [blame] | 2944 | /* Accessing shadow arch. registers */ |
| 2945 | UInt VG_(get_shadow_archreg) ( UInt archreg ) |
| 2946 | { |
| 2947 | return VG_(baseBlock)[ shadow_reg_index(archreg) ]; |
| 2948 | } |
| 2949 | |
| 2950 | void VG_(set_shadow_archreg) ( UInt archreg, UInt val ) |
| 2951 | { |
| 2952 | VG_(baseBlock)[ shadow_reg_index(archreg) ] = val; |
| 2953 | } |
| 2954 | |
njn | d304045 | 2003-05-19 15:04:06 +0000 | [diff] [blame^] | 2955 | void VG_(set_shadow_eflags) ( UInt val ) |
| 2956 | { |
| 2957 | VG_(baseBlock)[ VGOFF_(sh_eflags) ] = val; |
| 2958 | } |
| 2959 | |
njn | f4ce3d3 | 2003-02-10 10:17:26 +0000 | [diff] [blame] | 2960 | UInt VG_(get_thread_shadow_archreg) ( ThreadId tid, UInt archreg ) |
| 2961 | { |
| 2962 | ThreadState* tst; |
| 2963 | |
| 2964 | vg_assert(VG_(is_valid_tid)(tid)); |
| 2965 | tst = & VG_(threads)[tid]; |
| 2966 | |
| 2967 | switch (archreg) { |
| 2968 | case R_EAX: return tst->sh_eax; |
| 2969 | case R_ECX: return tst->sh_ecx; |
| 2970 | case R_EDX: return tst->sh_edx; |
| 2971 | case R_EBX: return tst->sh_ebx; |
| 2972 | case R_ESP: return tst->sh_esp; |
| 2973 | case R_EBP: return tst->sh_ebp; |
| 2974 | case R_ESI: return tst->sh_esi; |
| 2975 | case R_EDI: return tst->sh_edi; |
| 2976 | default: VG_(core_panic)( "get_thread_shadow_archreg"); |
| 2977 | } |
| 2978 | } |
| 2979 | |
| 2980 | void VG_(set_thread_shadow_archreg) ( ThreadId tid, UInt archreg, UInt val ) |
| 2981 | { |
| 2982 | ThreadState* tst; |
| 2983 | |
| 2984 | vg_assert(VG_(is_valid_tid)(tid)); |
| 2985 | tst = & VG_(threads)[tid]; |
| 2986 | |
| 2987 | switch (archreg) { |
| 2988 | case R_EAX: tst->sh_eax = val; break; |
| 2989 | case R_ECX: tst->sh_ecx = val; break; |
| 2990 | case R_EDX: tst->sh_edx = val; break; |
| 2991 | case R_EBX: tst->sh_ebx = val; break; |
| 2992 | case R_ESP: tst->sh_esp = val; break; |
| 2993 | case R_EBP: tst->sh_ebp = val; break; |
| 2994 | case R_ESI: tst->sh_esi = val; break; |
| 2995 | case R_EDI: tst->sh_edi = val; break; |
| 2996 | default: VG_(core_panic)( "set_thread_shadow_archreg"); |
| 2997 | } |
| 2998 | } |
| 2999 | |
njn | b93d178 | 2003-02-03 12:03:22 +0000 | [diff] [blame] | 3000 | Addr VG_(shadow_archreg_address) ( UInt archreg ) |
| 3001 | { |
| 3002 | return (Addr) & VG_(baseBlock)[ shadow_reg_index(archreg) ]; |
| 3003 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3004 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3005 | static void synth_WIDEN_signed ( Int sz_src, Int sz_dst, Int reg ) |
| 3006 | { |
| 3007 | if (sz_src == 1 && sz_dst == 4) { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3008 | VG_(emit_shiftopv_lit_reg) ( False, 4, SHL, 24, reg ); |
| 3009 | VG_(emit_shiftopv_lit_reg) ( False, 4, SAR, 24, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3010 | } |
| 3011 | else if (sz_src == 2 && sz_dst == 4) { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3012 | VG_(emit_shiftopv_lit_reg) ( False, 4, SHL, 16, reg ); |
| 3013 | VG_(emit_shiftopv_lit_reg) ( False, 4, SAR, 16, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3014 | } |
| 3015 | else if (sz_src == 1 && sz_dst == 2) { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3016 | VG_(emit_shiftopv_lit_reg) ( False, 2, SHL, 8, reg ); |
| 3017 | VG_(emit_shiftopv_lit_reg) ( False, 2, SAR, 8, reg ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3018 | } |
| 3019 | else |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3020 | VG_(core_panic)("synth_WIDEN"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3021 | } |
| 3022 | |
| 3023 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3024 | /*----------------------------------------------------*/ |
| 3025 | /*--- Generate code for a single UInstr. ---*/ |
| 3026 | /*----------------------------------------------------*/ |
| 3027 | |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3028 | static __inline__ |
| 3029 | Bool writeFlagUse ( UInstr* u ) |
njn | 5a74eb8 | 2002-08-06 20:56:40 +0000 | [diff] [blame] | 3030 | { |
| 3031 | return (u->flags_w != FlagsEmpty); |
| 3032 | } |
| 3033 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3034 | static __inline__ |
| 3035 | Bool readFlagUse ( UInstr* u ) |
| 3036 | { |
| 3037 | /* If the UInstr writes some flags but not all, then we still need |
| 3038 | to consider it as reading flags so that the unchanged values are |
| 3039 | passed through properly. (D is special) */ |
| 3040 | return |
| 3041 | (u->flags_r != FlagsEmpty) || |
| 3042 | (u->flags_w != FlagsEmpty && u->flags_w != FlagsOSZACP) ; |
| 3043 | } |
| 3044 | |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3045 | static __inline__ |
| 3046 | Bool anyFlagUse ( UInstr* u ) |
| 3047 | { |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3048 | return readFlagUse(u) || writeFlagUse(u); |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3049 | } |
| 3050 | |
| 3051 | |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3052 | /* *fplive==True indicates that the simulated machine's FPU/SSE state is in |
| 3053 | the real machine's cpu. If so we need to be very careful not to trash it. |
| 3054 | If FPU/SSE state is live and we deem it necessary to copy it back to |
| 3055 | the simulated machine's FPU/SSE state, we do so. The final state of |
| 3056 | fpliveness is returned. In short we _must_ do put_sse_state if |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3057 | there is any chance at all that the code generated for a UInstr |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3058 | will change the real FPU/MMX/SSE/SSE2 state. |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3059 | */ |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3060 | static void emitUInstr ( UCodeBlock* cb, Int i, |
| 3061 | RRegSet regs_live_before, |
| 3062 | /* Running state, which we update. */ |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3063 | Bool* sselive, /* True<==>FPU/SSE |
| 3064 | state in real FPU */ |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3065 | Addr* orig_eip, /* previous curr_eip, or zero */ |
| 3066 | Addr* curr_eip ) /* current eip */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3067 | { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3068 | Int old_emitted_code_used; |
| 3069 | UInstr* u = &cb->instrs[i]; |
| 3070 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3071 | if (dis) |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 3072 | VG_(pp_UInstr_regs)(i, u); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3073 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3074 | old_emitted_code_used = emitted_code_used; |
| 3075 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3076 | switch (u->opcode) { |
sewardj | 7a5ebcf | 2002-11-13 22:42:13 +0000 | [diff] [blame] | 3077 | case NOP: case LOCK: case CALLM_S: case CALLM_E: break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3078 | |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3079 | case INCEIP: |
| 3080 | /* Advance %EIP some small amount. */ |
| 3081 | *curr_eip += (UInt)(u->val1); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3082 | |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3083 | if (*orig_eip == 0 /* we don't know what the old value was */ |
| 3084 | || ((*orig_eip & ~0xFF) != (*curr_eip & ~0xFF))) { |
| 3085 | /* We have to update all 32 bits of the value. */ |
| 3086 | VG_(emit_movv_lit_offregmem)( |
| 3087 | 4, *curr_eip, 4*VGOFF_(m_eip), R_EBP); |
| 3088 | } else { |
| 3089 | /* Cool! we only need to update lowest 8 bits */ |
| 3090 | VG_(emit_movb_lit_offregmem)( |
| 3091 | *curr_eip & 0xFF, 4*VGOFF_(m_eip)+0, R_EBP); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3092 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3093 | |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3094 | *orig_eip = *curr_eip; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3095 | break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3096 | |
| 3097 | case LEA1: { |
| 3098 | vg_assert(u->tag1 == RealReg); |
| 3099 | vg_assert(u->tag2 == RealReg); |
| 3100 | emit_lea_litreg_reg ( u->lit32, u->val1, u->val2 ); |
| 3101 | break; |
| 3102 | } |
| 3103 | |
| 3104 | case LEA2: { |
| 3105 | vg_assert(u->tag1 == RealReg); |
| 3106 | vg_assert(u->tag2 == RealReg); |
| 3107 | vg_assert(u->tag3 == RealReg); |
| 3108 | emit_lea_sib_reg ( u->lit32, u->extra4b, |
| 3109 | u->val1, u->val2, u->val3 ); |
| 3110 | break; |
| 3111 | } |
| 3112 | |
| 3113 | case WIDEN: { |
| 3114 | vg_assert(u->tag1 == RealReg); |
| 3115 | if (u->signed_widen) { |
| 3116 | synth_WIDEN_signed ( u->extra4b, u->size, u->val1 ); |
| 3117 | } else { |
| 3118 | /* no need to generate any code. */ |
| 3119 | } |
| 3120 | break; |
| 3121 | } |
| 3122 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3123 | case STORE: { |
| 3124 | vg_assert(u->tag1 == RealReg); |
| 3125 | vg_assert(u->tag2 == RealReg); |
| 3126 | synth_mov_reg_memreg ( u->size, u->val1, u->val2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3127 | break; |
| 3128 | } |
| 3129 | |
| 3130 | case LOAD: { |
| 3131 | vg_assert(u->tag1 == RealReg); |
| 3132 | vg_assert(u->tag2 == RealReg); |
| 3133 | synth_mov_regmem_reg ( u->size, u->val1, u->val2 ); |
| 3134 | break; |
| 3135 | } |
| 3136 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3137 | case GET: { |
| 3138 | vg_assert(u->tag1 == ArchReg || u->tag1 == SpillNo); |
| 3139 | vg_assert(u->tag2 == RealReg); |
| 3140 | synth_mov_offregmem_reg ( |
| 3141 | u->size, |
| 3142 | spillOrArchOffset( u->size, u->tag1, u->val1 ), |
| 3143 | R_EBP, |
| 3144 | u->val2 |
| 3145 | ); |
| 3146 | break; |
| 3147 | } |
| 3148 | |
| 3149 | case PUT: { |
| 3150 | vg_assert(u->tag2 == ArchReg || u->tag2 == SpillNo); |
| 3151 | vg_assert(u->tag1 == RealReg); |
njn | 9b007f6 | 2003-04-07 14:40:25 +0000 | [diff] [blame] | 3152 | synth_mov_reg_offregmem ( |
| 3153 | u->size, |
| 3154 | u->val1, |
| 3155 | spillOrArchOffset( u->size, u->tag2, u->val2 ), |
| 3156 | R_EBP |
| 3157 | ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3158 | break; |
| 3159 | } |
| 3160 | |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 3161 | case GETSEG: { |
| 3162 | vg_assert(u->tag1 == ArchRegS); |
| 3163 | vg_assert(u->tag2 == RealReg); |
| 3164 | vg_assert(u->size == 2); |
| 3165 | synth_mov_offregmem_reg ( |
| 3166 | 4, |
| 3167 | segRegOffset( u->val1 ), |
| 3168 | R_EBP, |
| 3169 | u->val2 |
| 3170 | ); |
| 3171 | break; |
| 3172 | } |
| 3173 | |
| 3174 | case PUTSEG: { |
| 3175 | vg_assert(u->tag1 == RealReg); |
| 3176 | vg_assert(u->tag2 == ArchRegS); |
| 3177 | vg_assert(u->size == 2); |
| 3178 | synth_mov_reg_offregmem ( |
| 3179 | 4, |
| 3180 | u->val1, |
| 3181 | segRegOffset( u->val2 ), |
| 3182 | R_EBP |
| 3183 | ); |
| 3184 | break; |
| 3185 | } |
| 3186 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3187 | case GETF: { |
| 3188 | vg_assert(u->size == 2 || u->size == 4); |
| 3189 | vg_assert(u->tag1 == RealReg); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3190 | |
| 3191 | /* This complexity is because the D(irection) flag is stored |
| 3192 | separately from the rest of EFLAGS. */ |
| 3193 | |
| 3194 | /* We're only fetching from the Simd state, so make sure it's |
| 3195 | up to date. */ |
| 3196 | maybe_emit_put_eflags(); |
| 3197 | |
| 3198 | /* get D in u->val1 (== 1 or -1) */ |
| 3199 | synth_mov_offregmem_reg (u->size, 4*VGOFF_(m_dflag), R_EBP, u->val1); |
| 3200 | |
| 3201 | /* u->val1 &= EFlagD (== 0 or EFlagD) */ |
| 3202 | synth_nonshiftop_lit_reg(False, AND, u->size, EFlagD, u->val1); |
| 3203 | |
| 3204 | /* EFLAGS &= ~EFlagD (make sure there's no surprises) */ |
| 3205 | synth_nonshiftop_lit_offregmem(False, AND, u->size, ~EFlagD, |
| 3206 | eflagsOffset(), R_EBP); |
| 3207 | |
| 3208 | /* EFLAGS &= ~EFlagD (make sure there's no surprises) */ |
| 3209 | synth_nonshiftop_lit_offregmem(False, AND, u->size, ~EFlagD, |
| 3210 | eflagsOffset(), R_EBP); |
| 3211 | |
| 3212 | /* u->val1 |= EFLAGS (EFLAGS & EflagD == 0) */ |
| 3213 | synth_nonshiftop_offregmem_reg(False, OR, u->size, |
| 3214 | eflagsOffset(), R_EBP, u->val1); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3215 | break; |
| 3216 | } |
| 3217 | |
| 3218 | case PUTF: { |
| 3219 | vg_assert(u->size == 2 || u->size == 4); |
| 3220 | vg_assert(u->tag1 == RealReg); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3221 | |
| 3222 | /* When putting a value into EFLAGS, this generates the |
| 3223 | correct value for m_dflag (-1 or 1), and clears the D bit |
| 3224 | in EFLAGS. */ |
| 3225 | |
| 3226 | /* We're updating the whole flag state, so the old state |
| 3227 | doesn't matter; make sure that the new simulated state |
| 3228 | will be fetched when needed. */ |
| 3229 | eflags_state = UPD_Simd; |
| 3230 | |
| 3231 | /* store EFLAGS (with D) */ |
| 3232 | synth_mov_reg_offregmem (u->size, u->val1, eflagsOffset(), R_EBP); |
| 3233 | |
| 3234 | /* u->val1 &= EFlagD */ |
| 3235 | synth_nonshiftop_lit_reg(False, AND, u->size, EFlagD, u->val1); |
| 3236 | |
| 3237 | /* computes: u->val1 = (u->val1 == 0) ? 1 : -1 */ |
| 3238 | synth_unaryop_reg(False, NEG, u->size, u->val1); |
| 3239 | synth_nonshiftop_reg_reg(False, SBB, u->size, u->val1, u->val1); |
| 3240 | synth_nonshiftop_lit_reg(False, SBB, u->size, -1, u->val1); |
| 3241 | |
| 3242 | /* save D */ |
| 3243 | synth_mov_reg_offregmem(u->size, u->val1, 4*VGOFF_(m_dflag), R_EBP); |
| 3244 | |
| 3245 | /* EFLAGS &= ~EFlagD */ |
| 3246 | synth_nonshiftop_lit_offregmem(False, AND, u->size, ~EFlagD, |
| 3247 | eflagsOffset(), R_EBP); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3248 | break; |
| 3249 | } |
| 3250 | |
| 3251 | case MOV: { |
| 3252 | vg_assert(u->tag1 == RealReg || u->tag1 == Literal); |
| 3253 | vg_assert(u->tag2 == RealReg); |
| 3254 | switch (u->tag1) { |
| 3255 | case RealReg: vg_assert(u->size == 4); |
| 3256 | if (u->val1 != u->val2) |
| 3257 | synth_movl_reg_reg ( u->val1, u->val2 ); |
| 3258 | break; |
| 3259 | case Literal: synth_mov_lit_reg ( u->size, u->lit32, u->val2 ); |
| 3260 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3261 | default: VG_(core_panic)("emitUInstr:mov"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3262 | } |
| 3263 | break; |
| 3264 | } |
| 3265 | |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 3266 | case USESEG: { |
| 3267 | /* Lazy: copy all three vals; synth_ccall ignores any unnecessary |
| 3268 | ones. */ |
sewardj | d077f53 | 2002-09-30 21:52:50 +0000 | [diff] [blame] | 3269 | UInt argv[] = { u->val1, u->val2 }; |
| 3270 | UInt tagv[] = { RealReg, RealReg }; |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 3271 | UInt ret_reg = u->val2; |
| 3272 | |
| 3273 | vg_assert(u->tag1 == RealReg); |
| 3274 | vg_assert(u->tag2 == RealReg); |
| 3275 | vg_assert(u->size == 0); |
| 3276 | |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3277 | if (*sselive) { |
| 3278 | emit_put_sse_state(); |
| 3279 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3280 | } |
| 3281 | |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 3282 | VG_(synth_ccall) ( (Addr) & VG_(do_useseg), |
| 3283 | 2, /* args */ |
| 3284 | 0, /* regparms_n */ |
| 3285 | argv, tagv, |
| 3286 | ret_reg, regs_live_before, u->regs_live_after ); |
| 3287 | break; |
| 3288 | } |
| 3289 | |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3290 | case SBB: |
| 3291 | case ADC: |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3292 | case XOR: |
| 3293 | case OR: |
| 3294 | case AND: |
| 3295 | case SUB: |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3296 | case ADD: { |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3297 | vg_assert(u->tag2 == RealReg); |
| 3298 | switch (u->tag1) { |
| 3299 | case Literal: synth_nonshiftop_lit_reg ( |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3300 | anyFlagUse(u), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3301 | u->opcode, u->size, u->lit32, u->val2 ); |
| 3302 | break; |
| 3303 | case RealReg: synth_nonshiftop_reg_reg ( |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3304 | anyFlagUse(u), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3305 | u->opcode, u->size, u->val1, u->val2 ); |
| 3306 | break; |
| 3307 | case ArchReg: synth_nonshiftop_offregmem_reg ( |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3308 | anyFlagUse(u), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3309 | u->opcode, u->size, |
| 3310 | spillOrArchOffset( u->size, u->tag1, u->val1 ), |
| 3311 | R_EBP, |
| 3312 | u->val2 ); |
| 3313 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3314 | default: VG_(core_panic)("emitUInstr:non-shift-op"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3315 | } |
| 3316 | break; |
| 3317 | } |
| 3318 | |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3319 | case RCR: |
| 3320 | case RCL: |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3321 | case ROR: |
| 3322 | case ROL: |
| 3323 | case SAR: |
| 3324 | case SHR: |
| 3325 | case SHL: { |
| 3326 | vg_assert(u->tag2 == RealReg); |
| 3327 | switch (u->tag1) { |
| 3328 | case Literal: synth_shiftop_lit_reg ( |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3329 | anyFlagUse(u), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3330 | u->opcode, u->size, u->lit32, u->val2 ); |
| 3331 | break; |
| 3332 | case RealReg: synth_shiftop_reg_reg ( |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3333 | anyFlagUse(u), |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3334 | u->opcode, u->size, u->val1, u->val2 ); |
| 3335 | break; |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3336 | default: VG_(core_panic)("emitUInstr:non-shift-op"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3337 | } |
| 3338 | break; |
| 3339 | } |
| 3340 | |
| 3341 | case INC: |
| 3342 | case DEC: |
| 3343 | case NEG: |
| 3344 | case NOT: |
| 3345 | vg_assert(u->tag1 == RealReg); |
| 3346 | synth_unaryop_reg ( |
sewardj | 478335c | 2002-10-05 02:44:47 +0000 | [diff] [blame] | 3347 | anyFlagUse(u), u->opcode, u->size, u->val1 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3348 | break; |
| 3349 | |
| 3350 | case BSWAP: |
| 3351 | vg_assert(u->tag1 == RealReg); |
| 3352 | vg_assert(u->size == 4); |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 3353 | vg_assert(!VG_(any_flag_use)(u)); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3354 | emit_bswapl_reg ( u->val1 ); |
| 3355 | break; |
| 3356 | |
| 3357 | case CMOV: |
| 3358 | vg_assert(u->tag1 == RealReg); |
| 3359 | vg_assert(u->tag2 == RealReg); |
| 3360 | vg_assert(u->cond != CondAlways); |
| 3361 | vg_assert(u->size == 4); |
| 3362 | synth_cmovl_reg_reg ( u->cond, u->val1, u->val2 ); |
| 3363 | break; |
| 3364 | |
| 3365 | case JMP: { |
| 3366 | vg_assert(u->tag2 == NoValue); |
| 3367 | vg_assert(u->tag1 == RealReg || u->tag1 == Literal); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3368 | if (*sselive) { |
| 3369 | emit_put_sse_state(); |
| 3370 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3371 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3372 | if (u->cond == CondAlways) { |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 3373 | switch (u->tag1) { |
| 3374 | case RealReg: |
| 3375 | synth_jmp_reg ( u->val1, u->jmpkind ); |
| 3376 | break; |
| 3377 | case Literal: |
| 3378 | synth_jmp_lit ( u->lit32, u->jmpkind ); |
| 3379 | break; |
| 3380 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3381 | VG_(core_panic)("emitUInstr(JMP, unconditional, default)"); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 3382 | break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3383 | } |
| 3384 | } else { |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 3385 | switch (u->tag1) { |
| 3386 | case RealReg: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3387 | VG_(core_panic)("emitUInstr(JMP, conditional, RealReg)"); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 3388 | break; |
| 3389 | case Literal: |
| 3390 | vg_assert(u->jmpkind == JmpBoring); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3391 | /* %eax had better not be live since synth_jcond_lit |
| 3392 | trashes it in some circumstances. If that turns |
| 3393 | out to be a problem we can get synth_jcond_lit to |
| 3394 | push/pop it when it is live. */ |
| 3395 | vg_assert(! IS_RREG_LIVE(VG_(realreg_to_rank)(R_EAX), |
| 3396 | u->regs_live_after)); |
| 3397 | synth_jcond_lit ( u->cond, u->lit32, True ); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 3398 | break; |
| 3399 | default: |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3400 | VG_(core_panic)("emitUInstr(JMP, conditional, default)"); |
sewardj | 2e93c50 | 2002-04-12 11:12:52 +0000 | [diff] [blame] | 3401 | break; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3402 | } |
| 3403 | } |
| 3404 | break; |
| 3405 | } |
| 3406 | |
| 3407 | case JIFZ: |
| 3408 | vg_assert(u->tag1 == RealReg); |
| 3409 | vg_assert(u->tag2 == Literal); |
| 3410 | vg_assert(u->size == 4); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3411 | if (*sselive) { |
| 3412 | emit_put_sse_state(); |
| 3413 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3414 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3415 | synth_jmp_ifzero_reg_lit ( u->val1, u->lit32 ); |
| 3416 | break; |
| 3417 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3418 | case PUSH: |
| 3419 | vg_assert(u->tag1 == RealReg); |
| 3420 | vg_assert(u->tag2 == NoValue); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3421 | VG_(emit_pushv_reg) ( 4, u->val1 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3422 | break; |
| 3423 | |
| 3424 | case POP: |
| 3425 | vg_assert(u->tag1 == RealReg); |
| 3426 | vg_assert(u->tag2 == NoValue); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3427 | VG_(emit_popv_reg) ( 4, u->val1 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3428 | break; |
| 3429 | |
| 3430 | case CALLM: |
| 3431 | vg_assert(u->tag1 == Lit16); |
| 3432 | vg_assert(u->tag2 == NoValue); |
| 3433 | vg_assert(u->size == 0); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3434 | if (*sselive) { |
| 3435 | emit_put_sse_state(); |
| 3436 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3437 | } |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3438 | /* Call to a helper which is pretending to be a real CPU |
| 3439 | instruction (and therefore operates on Real flags and |
| 3440 | registers) */ |
| 3441 | VG_(synth_call) ( False, u->val1, |
| 3442 | True, u->flags_r, u->flags_w ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3443 | break; |
| 3444 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3445 | case CCALL: { |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 3446 | /* If you change this, remember to change USESEG above, since |
| 3447 | that's just a copy of this, slightly simplified. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3448 | /* Lazy: copy all three vals; synth_ccall ignores any unnecessary |
| 3449 | ones. */ |
| 3450 | UInt argv[] = { u->val1, u->val2, u->val3 }; |
| 3451 | UInt tagv[] = { RealReg, RealReg, RealReg }; |
| 3452 | UInt ret_reg = ( u->has_ret_val ? u->val3 : INVALID_REALREG ); |
| 3453 | |
| 3454 | if (u->argc >= 1) vg_assert(u->tag1 == RealReg); |
| 3455 | else vg_assert(u->tag1 == NoValue); |
| 3456 | if (u->argc >= 2) vg_assert(u->tag2 == RealReg); |
| 3457 | else vg_assert(u->tag2 == NoValue); |
| 3458 | if (u->argc == 3 || u->has_ret_val) vg_assert(u->tag3 == RealReg); |
| 3459 | else vg_assert(u->tag3 == NoValue); |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 3460 | vg_assert(u->size == 0); |
| 3461 | |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3462 | if (*sselive) { |
| 3463 | emit_put_sse_state(); |
| 3464 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3465 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3466 | VG_(synth_ccall) ( u->lit32, u->argc, u->regparms_n, argv, tagv, |
| 3467 | ret_reg, regs_live_before, u->regs_live_after ); |
njn | 6431be7 | 2002-07-28 09:53:34 +0000 | [diff] [blame] | 3468 | break; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3469 | } |
sewardj | e104247 | 2002-09-30 12:33:11 +0000 | [diff] [blame] | 3470 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3471 | case CLEAR: |
| 3472 | vg_assert(u->tag1 == Lit16); |
| 3473 | vg_assert(u->tag2 == NoValue); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3474 | VG_(emit_add_lit_to_esp) ( u->val1 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3475 | break; |
| 3476 | |
| 3477 | case CC2VAL: |
| 3478 | vg_assert(u->tag1 == RealReg); |
| 3479 | vg_assert(u->tag2 == NoValue); |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 3480 | vg_assert(VG_(any_flag_use)(u)); |
sewardj | f0f12aa | 2002-12-28 00:04:08 +0000 | [diff] [blame] | 3481 | synth_setb_reg ( True, u->val1, u->cond ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3482 | break; |
| 3483 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3484 | case FPU_R: |
| 3485 | case FPU_W: |
| 3486 | vg_assert(u->tag1 == Lit16); |
| 3487 | vg_assert(u->tag2 == RealReg); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3488 | if (!(*sselive)) { |
| 3489 | emit_get_sse_state(); |
| 3490 | *sselive = True; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3491 | } |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3492 | synth_fpu_regmem ( u->flags_r, u->flags_w, |
| 3493 | (u->val1 >> 8) & 0xFF, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3494 | u->val1 & 0xFF, |
| 3495 | u->val2 ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3496 | break; |
| 3497 | |
| 3498 | case FPU: |
| 3499 | vg_assert(u->tag1 == Lit16); |
| 3500 | vg_assert(u->tag2 == NoValue); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3501 | if (!(*sselive)) { |
| 3502 | emit_get_sse_state(); |
| 3503 | *sselive = True; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3504 | } |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3505 | synth_fpu_no_mem ( u->flags_r, u->flags_w, |
| 3506 | (u->val1 >> 8) & 0xFF, |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3507 | u->val1 & 0xFF ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3508 | break; |
| 3509 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3510 | case MMX2_MemWr: |
| 3511 | case MMX2_MemRd: |
sewardj | d1c9e43 | 2003-04-04 20:40:34 +0000 | [diff] [blame] | 3512 | vg_assert(u->size == 4 || u->size == 8); |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3513 | vg_assert(u->tag1 == Lit16); |
| 3514 | vg_assert(u->tag2 == RealReg); |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3515 | vg_assert(u->tag3 == NoValue); |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3516 | vg_assert(!anyFlagUse(u)); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3517 | if (!(*sselive)) { |
| 3518 | emit_get_sse_state(); |
| 3519 | *sselive = True; |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3520 | } |
| 3521 | synth_MMX2_regmem ( u->flags_r, u->flags_w, |
| 3522 | (u->val1 >> 8) & 0xFF, |
| 3523 | u->val1 & 0xFF, |
| 3524 | u->val2 ); |
| 3525 | break; |
| 3526 | |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3527 | case MMX2_RegRd: |
| 3528 | vg_assert(u->tag1 == Lit16); |
| 3529 | vg_assert(u->tag2 == RealReg); |
| 3530 | vg_assert(u->tag3 == NoValue); |
| 3531 | vg_assert(!anyFlagUse(u)); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3532 | if (!(*sselive)) { |
| 3533 | emit_get_sse_state(); |
| 3534 | *sselive = True; |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3535 | } |
| 3536 | synth_MMX2_reg_to_mmxreg ( u->flags_r, u->flags_w, |
| 3537 | (u->val1 >> 8) & 0xFF, |
| 3538 | u->val1 & 0xFF, |
| 3539 | u->val2 ); |
| 3540 | break; |
| 3541 | |
sewardj | d1c9e43 | 2003-04-04 20:40:34 +0000 | [diff] [blame] | 3542 | case MMX2_RegWr: |
| 3543 | vg_assert(u->tag1 == Lit16); |
| 3544 | vg_assert(u->tag2 == RealReg); |
| 3545 | vg_assert(u->tag3 == NoValue); |
| 3546 | vg_assert(!anyFlagUse(u)); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3547 | if (!(*sselive)) { |
| 3548 | emit_get_sse_state(); |
| 3549 | *sselive = True; |
sewardj | d1c9e43 | 2003-04-04 20:40:34 +0000 | [diff] [blame] | 3550 | } |
| 3551 | synth_MMX2_mmxreg_to_reg ( u->flags_r, u->flags_w, |
| 3552 | (u->val1 >> 8) & 0xFF, |
| 3553 | u->val1 & 0xFF, |
| 3554 | u->val2 ); |
| 3555 | break; |
| 3556 | |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3557 | case MMX1: |
| 3558 | vg_assert(u->tag1 == Lit16); |
| 3559 | vg_assert(u->tag2 == NoValue); |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3560 | vg_assert(u->tag3 == NoValue); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3561 | if (!(*sselive)) { |
| 3562 | emit_get_sse_state(); |
| 3563 | *sselive = True; |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3564 | } |
| 3565 | synth_MMX1_no_mem ( u->flags_r, u->flags_w, |
| 3566 | u->val1 & 0xFF ); |
| 3567 | break; |
| 3568 | |
| 3569 | case MMX2: |
| 3570 | vg_assert(u->tag1 == Lit16); |
| 3571 | vg_assert(u->tag2 == NoValue); |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3572 | vg_assert(u->tag3 == NoValue); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3573 | if (!(*sselive)) { |
| 3574 | emit_get_sse_state(); |
| 3575 | *sselive = True; |
sewardj | 3d7c9c8 | 2003-03-26 21:08:13 +0000 | [diff] [blame] | 3576 | } |
| 3577 | synth_MMX2_no_mem ( u->flags_r, u->flags_w, |
| 3578 | (u->val1 >> 8) & 0xFF, |
| 3579 | u->val1 & 0xFF ); |
| 3580 | break; |
| 3581 | |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3582 | case MMX3: |
| 3583 | vg_assert(u->tag1 == Lit16); |
| 3584 | vg_assert(u->tag2 == Lit16); |
| 3585 | vg_assert(u->tag3 == NoValue); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3586 | if (!(*sselive)) { |
| 3587 | emit_get_sse_state(); |
| 3588 | *sselive = True; |
sewardj | ca86001 | 2003-03-27 23:52:58 +0000 | [diff] [blame] | 3589 | } |
| 3590 | synth_MMX3_no_mem ( u->flags_r, u->flags_w, |
| 3591 | (u->val1 >> 8) & 0xFF, |
| 3592 | u->val1 & 0xFF, |
| 3593 | u->val2 & 0xFF ); |
| 3594 | break; |
| 3595 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3596 | default: |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3597 | if (VG_(needs).extended_UCode) { |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3598 | if (*sselive) { |
| 3599 | emit_put_sse_state(); |
| 3600 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3601 | } |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 3602 | SK_(emit_XUInstr)(u, regs_live_before); |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3603 | } else { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3604 | VG_(printf)("\nError:\n" |
| 3605 | " unhandled opcode: %u. Perhaps " |
| 3606 | " VG_(needs).extended_UCode should be set?\n", |
| 3607 | u->opcode); |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 3608 | VG_(pp_UInstr)(0,u); |
njn | e427a66 | 2002-10-02 11:08:25 +0000 | [diff] [blame] | 3609 | VG_(core_panic)("emitUInstr: unimplemented opcode"); |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3610 | } |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3611 | } |
| 3612 | |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3613 | if (0 && (*sselive)) { |
| 3614 | emit_put_sse_state(); |
| 3615 | *sselive = False; |
sewardj | 1b7d802 | 2002-11-30 12:35:42 +0000 | [diff] [blame] | 3616 | } |
| 3617 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3618 | /* Update UInstr histogram */ |
| 3619 | vg_assert(u->opcode < 100); |
| 3620 | histogram[u->opcode].counts++; |
| 3621 | histogram[u->opcode].size += (emitted_code_used - old_emitted_code_used); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3622 | } |
| 3623 | |
| 3624 | |
| 3625 | /* Emit x86 for the ucode in cb, returning the address of the |
| 3626 | generated code and setting *nbytes to its size. */ |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3627 | UChar* VG_(emit_code) ( UCodeBlock* cb, |
| 3628 | Int* nbytes, |
| 3629 | UShort j[VG_MAX_JUMPS] ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3630 | { |
| 3631 | Int i; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3632 | UChar regs_live_before = 0; /* No regs live at BB start */ |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3633 | Bool sselive; |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3634 | Addr orig_eip, curr_eip; |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 3635 | Int tgt; |
| 3636 | |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3637 | reset_state(); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3638 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3639 | if (dis) VG_(printf)("Generated x86 code:\n"); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3640 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 3641 | /* Generate decl VG_(dispatch_ctr) and drop into dispatch if we hit |
| 3642 | zero. We have to do this regardless of whether we're t-chaining |
| 3643 | or not. */ |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 3644 | VG_(init_target)(&tgt); |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3645 | VG_(new_emit)(False, FlagsEmpty, FlagsOSZAP); |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 3646 | VG_(emitB) (0xFF); /* decl */ |
| 3647 | emit_amode_litmem_reg((Addr)&VG_(dispatch_ctr), 1); |
| 3648 | if (dis) |
| 3649 | VG_(printf)("\n\t\tdecl (%p)\n", &VG_(dispatch_ctr)); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 3650 | VG_(emit_jcondshort_target)(False, CondNZ, &tgt); |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 3651 | VG_(emit_movv_lit_reg) ( 4, VG_TRC_INNER_COUNTERZERO, R_EBP ); |
| 3652 | emit_ret(); |
sewardj | a2113f9 | 2002-12-12 23:42:48 +0000 | [diff] [blame] | 3653 | VG_(target_forward)(&tgt); |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 3654 | |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3655 | /* Set up running state. */ |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3656 | sselive = False; |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3657 | orig_eip = cb->orig_eip; /* we know EIP is up to date on BB entry */ |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3658 | curr_eip = cb->orig_eip; |
| 3659 | vg_assert(curr_eip != 0); /* otherwise the incremental updating |
| 3660 | algorithm gets messed up. */ |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3661 | /* for each uinstr ... */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3662 | for (i = 0; i < cb->used; i++) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3663 | UInstr* u = &cb->instrs[i]; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3664 | if (cb->instrs[i].opcode != NOP) { |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3665 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3666 | /* Check on the sanity of this insn. */ |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3667 | Bool sane = VG_(saneUInstr)( False, False, u ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3668 | if (!sane) { |
| 3669 | VG_(printf)("\ninsane instruction\n"); |
njn | 4ba5a79 | 2002-09-30 10:23:54 +0000 | [diff] [blame] | 3670 | VG_(up_UInstr)( i, u ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3671 | } |
| 3672 | vg_assert(sane); |
sewardj | b5ff83e | 2002-12-01 19:40:49 +0000 | [diff] [blame] | 3673 | emitUInstr( cb, i, regs_live_before, |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3674 | &sselive, &orig_eip, &curr_eip ); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3675 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3676 | regs_live_before = u->regs_live_after; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3677 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3678 | if (dis) VG_(printf)("\n"); |
sewardj | b91ae7f | 2003-04-29 23:50:00 +0000 | [diff] [blame] | 3679 | vg_assert(!sselive); /* SSE state must be saved by end of BB */ |
sewardj | fa492d4 | 2002-12-08 18:20:01 +0000 | [diff] [blame] | 3680 | vg_assert(eflags_state != UPD_Real); /* flags can't just be in CPU */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3681 | |
sewardj | 22854b9 | 2002-11-30 14:00:47 +0000 | [diff] [blame] | 3682 | if (j != NULL) { |
| 3683 | vg_assert(jumpidx <= VG_MAX_JUMPS); |
| 3684 | for(i = 0; i < jumpidx; i++) |
| 3685 | j[i] = jumps[i]; |
| 3686 | } |
| 3687 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3688 | /* Returns a pointer to the emitted code. This will have to be |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3689 | copied by the caller into the translation cache, and then freed */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3690 | *nbytes = emitted_code_used; |
| 3691 | return emitted_code; |
| 3692 | } |
| 3693 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 3694 | #undef dis |
| 3695 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 3696 | /*--------------------------------------------------------------------*/ |
| 3697 | /*--- end vg_from_ucode.c ---*/ |
| 3698 | /*--------------------------------------------------------------------*/ |