sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1 | /* -*- mode: C; c-basic-offset: 3; -*- */ |
| 2 | |
| 3 | /*---------------------------------------------------------------*/ |
| 4 | /*--- begin guest_s390_helpers.c ---*/ |
| 5 | /*---------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
| 8 | This file is part of Valgrind, a dynamic binary instrumentation |
| 9 | framework. |
| 10 | |
sewardj | 785952d | 2015-08-21 11:29:16 +0000 | [diff] [blame] | 11 | Copyright IBM Corp. 2010-2015 |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 12 | |
| 13 | This program is free software; you can redistribute it and/or |
| 14 | modify it under the terms of the GNU General Public License as |
| 15 | published by the Free Software Foundation; either version 2 of the |
| 16 | License, or (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, but |
| 19 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 26 | 02110-1301, USA. |
| 27 | |
| 28 | The GNU General Public License is contained in the file COPYING. |
| 29 | */ |
| 30 | |
| 31 | /* Contributed by Florian Krohm */ |
| 32 | |
| 33 | #include "libvex_basictypes.h" |
florian | 33b0243 | 2012-08-25 21:48:04 +0000 | [diff] [blame] | 34 | #include "libvex_emnote.h" |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 35 | #include "libvex_guest_s390x.h" |
| 36 | #include "libvex_ir.h" |
| 37 | #include "libvex.h" |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 38 | #include "libvex_s390x_common.h" |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 39 | |
| 40 | #include "main_util.h" |
philippe | 6c46bef | 2012-08-14 22:29:01 +0000 | [diff] [blame] | 41 | #include "main_globals.h" |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 42 | #include "guest_generic_bb_to_IR.h" |
| 43 | #include "guest_s390_defs.h" |
florian | b0b6710 | 2012-12-24 00:14:31 +0000 | [diff] [blame] | 44 | #include "s390_defs.h" /* S390_BFP_ROUND_xyzzy */ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 45 | |
| 46 | void |
| 47 | LibVEX_GuestS390X_initialise(VexGuestS390XState *state) |
| 48 | { |
| 49 | /*------------------------------------------------------------*/ |
| 50 | /*--- Initialise ar registers ---*/ |
| 51 | /*------------------------------------------------------------*/ |
| 52 | |
| 53 | state->guest_a0 = 0; |
| 54 | state->guest_a1 = 0; |
| 55 | state->guest_a2 = 0; |
| 56 | state->guest_a3 = 0; |
| 57 | state->guest_a4 = 0; |
| 58 | state->guest_a5 = 0; |
| 59 | state->guest_a6 = 0; |
| 60 | state->guest_a7 = 0; |
| 61 | state->guest_a8 = 0; |
| 62 | state->guest_a9 = 0; |
| 63 | state->guest_a10 = 0; |
| 64 | state->guest_a11 = 0; |
| 65 | state->guest_a12 = 0; |
| 66 | state->guest_a13 = 0; |
| 67 | state->guest_a14 = 0; |
| 68 | state->guest_a15 = 0; |
| 69 | |
| 70 | /*------------------------------------------------------------*/ |
| 71 | /*--- Initialise fpr registers ---*/ |
| 72 | /*------------------------------------------------------------*/ |
| 73 | |
| 74 | state->guest_f0 = 0; |
| 75 | state->guest_f1 = 0; |
| 76 | state->guest_f2 = 0; |
| 77 | state->guest_f3 = 0; |
| 78 | state->guest_f4 = 0; |
| 79 | state->guest_f5 = 0; |
| 80 | state->guest_f6 = 0; |
| 81 | state->guest_f7 = 0; |
| 82 | state->guest_f8 = 0; |
| 83 | state->guest_f9 = 0; |
| 84 | state->guest_f10 = 0; |
| 85 | state->guest_f11 = 0; |
| 86 | state->guest_f12 = 0; |
| 87 | state->guest_f13 = 0; |
| 88 | state->guest_f14 = 0; |
| 89 | state->guest_f15 = 0; |
| 90 | |
| 91 | /*------------------------------------------------------------*/ |
| 92 | /*--- Initialise gpr registers ---*/ |
| 93 | /*------------------------------------------------------------*/ |
| 94 | |
| 95 | state->guest_r0 = 0; |
| 96 | state->guest_r1 = 0; |
| 97 | state->guest_r2 = 0; |
| 98 | state->guest_r3 = 0; |
| 99 | state->guest_r4 = 0; |
| 100 | state->guest_r5 = 0; |
| 101 | state->guest_r6 = 0; |
| 102 | state->guest_r7 = 0; |
| 103 | state->guest_r8 = 0; |
| 104 | state->guest_r9 = 0; |
| 105 | state->guest_r10 = 0; |
| 106 | state->guest_r11 = 0; |
| 107 | state->guest_r12 = 0; |
| 108 | state->guest_r13 = 0; |
| 109 | state->guest_r14 = 0; |
| 110 | state->guest_r15 = 0; |
| 111 | |
| 112 | /*------------------------------------------------------------*/ |
| 113 | /*--- Initialise S390 miscellaneous registers ---*/ |
| 114 | /*------------------------------------------------------------*/ |
| 115 | |
| 116 | state->guest_counter = 0; |
| 117 | state->guest_fpc = 0; |
| 118 | state->guest_IA = 0; |
| 119 | |
| 120 | /*------------------------------------------------------------*/ |
| 121 | /*--- Initialise S390 pseudo registers ---*/ |
| 122 | /*------------------------------------------------------------*/ |
| 123 | |
| 124 | state->guest_SYSNO = 0; |
| 125 | |
| 126 | /*------------------------------------------------------------*/ |
| 127 | /*--- Initialise generic pseudo registers ---*/ |
| 128 | /*------------------------------------------------------------*/ |
| 129 | |
| 130 | state->guest_NRADDR = 0; |
sewardj | 05f5e01 | 2014-05-04 10:52:11 +0000 | [diff] [blame] | 131 | state->guest_CMSTART = 0; |
| 132 | state->guest_CMLEN = 0; |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 133 | state->guest_IP_AT_SYSCALL = 0; |
florian | 6ef84be | 2012-08-26 03:20:07 +0000 | [diff] [blame] | 134 | state->guest_EMNOTE = EmNote_NONE; |
florian | 8844a63 | 2012-04-13 04:04:06 +0000 | [diff] [blame] | 135 | state->host_EvC_COUNTER = 0; |
| 136 | state->host_EvC_FAILADDR = 0; |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 137 | |
| 138 | /*------------------------------------------------------------*/ |
| 139 | /*--- Initialise thunk ---*/ |
| 140 | /*------------------------------------------------------------*/ |
| 141 | |
| 142 | state->guest_CC_OP = 0; |
| 143 | state->guest_CC_DEP1 = 0; |
| 144 | state->guest_CC_DEP2 = 0; |
| 145 | state->guest_CC_NDEP = 0; |
florian | 5c328c0 | 2012-05-22 01:51:26 +0000 | [diff] [blame] | 146 | |
| 147 | __builtin_memset(state->padding, 0x0, sizeof(state->padding)); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | |
| 151 | /* Figure out if any part of the guest state contained in minoff |
| 152 | .. maxoff requires precise memory exceptions. If in doubt return |
philippe | 6c46bef | 2012-08-14 22:29:01 +0000 | [diff] [blame] | 153 | True (but this generates significantly slower code). */ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 154 | Bool |
sewardj | ca2c3c7 | 2015-02-05 12:53:20 +0000 | [diff] [blame] | 155 | guest_s390x_state_requires_precise_mem_exns ( |
| 156 | Int minoff, Int maxoff, VexRegisterUpdates pxControl |
| 157 | ) |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 158 | { |
sewardj | 6068788 | 2014-01-15 10:25:21 +0000 | [diff] [blame] | 159 | Int lr_min = S390X_GUEST_OFFSET(guest_LR); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 160 | Int lr_max = lr_min + 8 - 1; |
sewardj | 6068788 | 2014-01-15 10:25:21 +0000 | [diff] [blame] | 161 | Int sp_min = S390X_GUEST_OFFSET(guest_SP); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 162 | Int sp_max = sp_min + 8 - 1; |
sewardj | 6068788 | 2014-01-15 10:25:21 +0000 | [diff] [blame] | 163 | Int fp_min = S390X_GUEST_OFFSET(guest_FP); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 164 | Int fp_max = fp_min + 8 - 1; |
florian | e88b3c9 | 2011-07-05 02:48:39 +0000 | [diff] [blame] | 165 | Int ia_min = S390X_GUEST_OFFSET(guest_IA); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 166 | Int ia_max = ia_min + 8 - 1; |
| 167 | |
philippe | 6c46bef | 2012-08-14 22:29:01 +0000 | [diff] [blame] | 168 | if (maxoff < sp_min || minoff > sp_max) { |
| 169 | /* No overlap with SP */ |
sewardj | ca2c3c7 | 2015-02-05 12:53:20 +0000 | [diff] [blame] | 170 | if (pxControl == VexRegUpdSpAtMemAccess) |
philippe | 6c46bef | 2012-08-14 22:29:01 +0000 | [diff] [blame] | 171 | return False; // We only need to check stack pointer. |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 172 | } else { |
| 173 | return True; |
| 174 | } |
| 175 | |
philippe | 6c46bef | 2012-08-14 22:29:01 +0000 | [diff] [blame] | 176 | if (maxoff < lr_min || minoff > lr_max) { |
| 177 | /* No overlap with LR */ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 178 | } else { |
| 179 | return True; |
| 180 | } |
| 181 | |
| 182 | if (maxoff < fp_min || minoff > fp_max) { |
| 183 | /* No overlap with FP */ |
| 184 | } else { |
| 185 | return True; |
| 186 | } |
| 187 | |
| 188 | if (maxoff < ia_min || minoff > ia_max) { |
| 189 | /* No overlap with IA */ |
| 190 | } else { |
| 191 | return True; |
| 192 | } |
| 193 | |
| 194 | return False; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | #define ALWAYSDEFD(field) \ |
florian | e88b3c9 | 2011-07-05 02:48:39 +0000 | [diff] [blame] | 199 | { S390X_GUEST_OFFSET(field), \ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 200 | (sizeof ((VexGuestS390XState*)0)->field) } |
| 201 | |
| 202 | VexGuestLayout s390xGuest_layout = { |
| 203 | |
| 204 | /* Total size of the guest state, in bytes. */ |
| 205 | .total_sizeB = sizeof(VexGuestS390XState), |
| 206 | |
| 207 | /* Describe the stack pointer. */ |
sewardj | 6068788 | 2014-01-15 10:25:21 +0000 | [diff] [blame] | 208 | .offset_SP = S390X_GUEST_OFFSET(guest_SP), |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 209 | .sizeof_SP = 8, |
| 210 | |
| 211 | /* Describe the frame pointer. */ |
sewardj | 6068788 | 2014-01-15 10:25:21 +0000 | [diff] [blame] | 212 | .offset_FP = S390X_GUEST_OFFSET(guest_FP), |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 213 | .sizeof_FP = 8, |
| 214 | |
| 215 | /* Describe the instruction pointer. */ |
florian | e88b3c9 | 2011-07-05 02:48:39 +0000 | [diff] [blame] | 216 | .offset_IP = S390X_GUEST_OFFSET(guest_IA), |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 217 | .sizeof_IP = 8, |
| 218 | |
| 219 | /* Describe any sections to be regarded by Memcheck as |
| 220 | 'always-defined'. */ |
| 221 | .n_alwaysDefd = 9, |
| 222 | |
| 223 | /* Flags thunk: OP and NDEP are always defined, whereas DEP1 |
| 224 | and DEP2 have to be tracked. See detailed comment in |
| 225 | gdefs.h on meaning of thunk fields. */ |
| 226 | .alwaysDefd = { |
| 227 | /* 0 */ ALWAYSDEFD(guest_CC_OP), /* generic */ |
| 228 | /* 1 */ ALWAYSDEFD(guest_CC_NDEP), /* generic */ |
florian | 6ef84be | 2012-08-26 03:20:07 +0000 | [diff] [blame] | 229 | /* 2 */ ALWAYSDEFD(guest_EMNOTE), /* generic */ |
sewardj | 05f5e01 | 2014-05-04 10:52:11 +0000 | [diff] [blame] | 230 | /* 3 */ ALWAYSDEFD(guest_CMSTART), /* generic */ |
| 231 | /* 4 */ ALWAYSDEFD(guest_CMLEN), /* generic */ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 232 | /* 5 */ ALWAYSDEFD(guest_IP_AT_SYSCALL), /* generic */ |
| 233 | /* 6 */ ALWAYSDEFD(guest_IA), /* control reg */ |
| 234 | /* 7 */ ALWAYSDEFD(guest_fpc), /* control reg */ |
| 235 | /* 8 */ ALWAYSDEFD(guest_counter), /* internal usage register */ |
| 236 | } |
| 237 | }; |
| 238 | |
| 239 | /*------------------------------------------------------------*/ |
| 240 | /*--- Dirty helper for EXecute ---*/ |
| 241 | /*------------------------------------------------------------*/ |
| 242 | void |
| 243 | s390x_dirtyhelper_EX(ULong torun) |
| 244 | { |
| 245 | last_execute_target = torun; |
| 246 | } |
| 247 | |
sewardj | 1e5fea6 | 2011-05-17 16:18:36 +0000 | [diff] [blame] | 248 | |
| 249 | /*------------------------------------------------------------*/ |
| 250 | /*--- Dirty helper for Clock instructions ---*/ |
| 251 | /*------------------------------------------------------------*/ |
| 252 | #if defined(VGA_s390x) |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 253 | ULong |
| 254 | s390x_dirtyhelper_STCK(ULong *addr) |
sewardj | 1e5fea6 | 2011-05-17 16:18:36 +0000 | [diff] [blame] | 255 | { |
florian | ffbd84d | 2012-12-09 02:06:29 +0000 | [diff] [blame] | 256 | UInt cc; |
sewardj | 1e5fea6 | 2011-05-17 16:18:36 +0000 | [diff] [blame] | 257 | |
| 258 | asm volatile("stck %0\n" |
| 259 | "ipm %1\n" |
| 260 | "srl %1,28\n" |
| 261 | : "+Q" (*addr), "=d" (cc) : : "cc"); |
| 262 | return cc; |
| 263 | } |
| 264 | |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 265 | ULong |
| 266 | s390x_dirtyhelper_STCKE(ULong *addr) |
sewardj | 1e5fea6 | 2011-05-17 16:18:36 +0000 | [diff] [blame] | 267 | { |
florian | ffbd84d | 2012-12-09 02:06:29 +0000 | [diff] [blame] | 268 | UInt cc; |
sewardj | 1e5fea6 | 2011-05-17 16:18:36 +0000 | [diff] [blame] | 269 | |
| 270 | asm volatile("stcke %0\n" |
| 271 | "ipm %1\n" |
| 272 | "srl %1,28\n" |
| 273 | : "+Q" (*addr), "=d" (cc) : : "cc"); |
| 274 | return cc; |
| 275 | } |
| 276 | |
| 277 | ULong s390x_dirtyhelper_STCKF(ULong *addr) |
| 278 | { |
florian | ffbd84d | 2012-12-09 02:06:29 +0000 | [diff] [blame] | 279 | UInt cc; |
sewardj | 1e5fea6 | 2011-05-17 16:18:36 +0000 | [diff] [blame] | 280 | |
| 281 | asm volatile(".insn s,0xb27c0000,%0\n" |
| 282 | "ipm %1\n" |
| 283 | "srl %1,28\n" |
| 284 | : "+Q" (*addr), "=d" (cc) : : "cc"); |
| 285 | return cc; |
| 286 | } |
| 287 | #else |
| 288 | ULong s390x_dirtyhelper_STCK(ULong *addr) {return 3;} |
| 289 | ULong s390x_dirtyhelper_STCKF(ULong *addr) {return 3;} |
| 290 | ULong s390x_dirtyhelper_STCKE(ULong *addr) {return 3;} |
| 291 | #endif /* VGA_s390x */ |
| 292 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 293 | /*------------------------------------------------------------*/ |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 294 | /*--- Dirty helper for Store Facility instruction ---*/ |
| 295 | /*------------------------------------------------------------*/ |
| 296 | #if defined(VGA_s390x) |
florian | b7def22 | 2012-12-04 04:45:32 +0000 | [diff] [blame] | 297 | static void |
| 298 | s390_set_facility_bit(ULong *addr, UInt bitno, UInt value) |
| 299 | { |
| 300 | addr += bitno / 64; |
| 301 | bitno = bitno % 64; |
| 302 | |
| 303 | ULong mask = 1; |
| 304 | mask <<= (63 - bitno); |
| 305 | |
| 306 | if (value == 1) { |
| 307 | *addr |= mask; // set |
| 308 | } else { |
| 309 | *addr &= ~mask; // clear |
| 310 | } |
| 311 | } |
| 312 | |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 313 | ULong |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 314 | s390x_dirtyhelper_STFLE(VexGuestS390XState *guest_state, ULong *addr) |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 315 | { |
| 316 | ULong hoststfle[S390_NUM_FACILITY_DW], cc, num_dw, i; |
| 317 | register ULong reg0 asm("0") = guest_state->guest_r0 & 0xF; /* r0[56:63] */ |
| 318 | |
| 319 | /* We cannot store more than S390_NUM_FACILITY_DW |
| 320 | (and it makes not much sense to do so anyhow) */ |
| 321 | if (reg0 > S390_NUM_FACILITY_DW - 1) |
| 322 | reg0 = S390_NUM_FACILITY_DW - 1; |
| 323 | |
| 324 | num_dw = reg0 + 1; /* number of double words written */ |
| 325 | |
| 326 | asm volatile(" .insn s,0xb2b00000,%0\n" /* stfle */ |
| 327 | "ipm %2\n" |
| 328 | "srl %2,28\n" |
| 329 | : "=m" (hoststfle), "+d"(reg0), "=d"(cc) : : "cc", "memory"); |
| 330 | |
| 331 | /* Update guest register 0 with what STFLE set r0 to */ |
| 332 | guest_state->guest_r0 = reg0; |
| 333 | |
florian | b7def22 | 2012-12-04 04:45:32 +0000 | [diff] [blame] | 334 | /* Set default: VM facilities = host facilities */ |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 335 | for (i = 0; i < num_dw; ++i) |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 336 | addr[i] = hoststfle[i]; |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 337 | |
florian | b7def22 | 2012-12-04 04:45:32 +0000 | [diff] [blame] | 338 | /* Now adjust the VM facilities according to what the VM supports */ |
| 339 | s390_set_facility_bit(addr, S390_FAC_LDISP, 1); |
| 340 | s390_set_facility_bit(addr, S390_FAC_EIMM, 1); |
| 341 | s390_set_facility_bit(addr, S390_FAC_ETF2, 1); |
| 342 | s390_set_facility_bit(addr, S390_FAC_ETF3, 1); |
| 343 | s390_set_facility_bit(addr, S390_FAC_GIE, 1); |
| 344 | s390_set_facility_bit(addr, S390_FAC_EXEXT, 1); |
| 345 | s390_set_facility_bit(addr, S390_FAC_HIGHW, 1); |
| 346 | |
| 347 | s390_set_facility_bit(addr, S390_FAC_HFPMAS, 0); |
| 348 | s390_set_facility_bit(addr, S390_FAC_HFPUNX, 0); |
| 349 | s390_set_facility_bit(addr, S390_FAC_XCPUT, 0); |
| 350 | s390_set_facility_bit(addr, S390_FAC_MSA, 0); |
| 351 | s390_set_facility_bit(addr, S390_FAC_PENH, 0); |
| 352 | s390_set_facility_bit(addr, S390_FAC_DFP, 0); |
| 353 | s390_set_facility_bit(addr, S390_FAC_PFPO, 0); |
| 354 | s390_set_facility_bit(addr, S390_FAC_DFPZC, 0); |
| 355 | s390_set_facility_bit(addr, S390_FAC_MISC, 0); |
| 356 | s390_set_facility_bit(addr, S390_FAC_CTREXE, 0); |
| 357 | s390_set_facility_bit(addr, S390_FAC_TREXE, 0); |
| 358 | s390_set_facility_bit(addr, S390_FAC_MSA4, 0); |
| 359 | |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 360 | return cc; |
| 361 | } |
| 362 | |
| 363 | #else |
| 364 | |
| 365 | ULong |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 366 | s390x_dirtyhelper_STFLE(VexGuestS390XState *guest_state, ULong *addr) |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 367 | { |
| 368 | return 3; |
| 369 | } |
| 370 | #endif /* VGA_s390x */ |
| 371 | |
florian | a0100c9 | 2012-07-20 00:06:35 +0000 | [diff] [blame] | 372 | /*------------------------------------------------------------*/ |
| 373 | /*--- Dirty helper for the "convert unicode" insn family. ---*/ |
| 374 | /*------------------------------------------------------------*/ |
| 375 | void |
| 376 | s390x_dirtyhelper_CUxy(UChar *address, ULong data, ULong num_bytes) |
| 377 | { |
| 378 | UInt i; |
| 379 | |
| 380 | vassert(num_bytes >= 1 && num_bytes <= 4); |
| 381 | |
| 382 | /* Store the least significant NUM_BYTES bytes in DATA left to right |
| 383 | at ADDRESS. */ |
| 384 | for (i = 1; i <= num_bytes; ++i) { |
| 385 | address[num_bytes - i] = data & 0xff; |
| 386 | data >>= 8; |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | |
| 391 | /*------------------------------------------------------------*/ |
| 392 | /*--- Clean helper for CU21. ---*/ |
| 393 | /*------------------------------------------------------------*/ |
| 394 | |
| 395 | /* The function performs a CU21 operation. It returns three things |
| 396 | encoded in an ULong value: |
| 397 | - the converted bytes (at most 4) |
| 398 | - the number of converted bytes |
| 399 | - an indication whether LOW_SURROGATE, if any, is invalid |
| 400 | |
| 401 | 64 48 16 8 0 |
| 402 | +-------+-----------------+-----------+-----------------------+ |
| 403 | | 0x0 | converted bytes | num_bytes | invalid_low_surrogate | |
| 404 | +-------+-----------------+-----------+-----------------------+ |
| 405 | */ |
| 406 | ULong |
| 407 | s390_do_cu21(UInt srcval, UInt low_surrogate) |
| 408 | { |
| 409 | ULong retval = 0; // shut up gcc |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 410 | UInt b1, b2, b3, b4, num_bytes, invalid_low_surrogate = 0; |
florian | a0100c9 | 2012-07-20 00:06:35 +0000 | [diff] [blame] | 411 | |
| 412 | srcval &= 0xffff; |
| 413 | |
| 414 | /* Determine the number of bytes in the converted value */ |
| 415 | if (srcval <= 0x007f) |
| 416 | num_bytes = 1; |
| 417 | else if (srcval >= 0x0080 && srcval <= 0x07ff) |
| 418 | num_bytes = 2; |
| 419 | else if ((srcval >= 0x0800 && srcval <= 0xd7ff) || |
| 420 | (srcval >= 0xdc00 && srcval <= 0xffff)) |
| 421 | num_bytes = 3; |
| 422 | else |
| 423 | num_bytes = 4; |
| 424 | |
| 425 | /* Determine UTF-8 bytes according to calculated num_bytes */ |
| 426 | switch (num_bytes){ |
| 427 | case 1: |
| 428 | retval = srcval; |
| 429 | break; |
| 430 | |
| 431 | case 2: |
| 432 | /* order of bytes left to right: b1, b2 */ |
| 433 | b1 = 0xc0; |
| 434 | b1 |= srcval >> 6; |
| 435 | |
| 436 | b2 = 0x80; |
| 437 | b2 |= srcval & 0x3f; |
| 438 | |
| 439 | retval = (b1 << 8) | b2; |
| 440 | break; |
| 441 | |
| 442 | case 3: |
| 443 | /* order of bytes left to right: b1, b2, b3 */ |
| 444 | b1 = 0xe0; |
| 445 | b1 |= srcval >> 12; |
| 446 | |
| 447 | b2 = 0x80; |
| 448 | b2 |= (srcval >> 6) & 0x3f; |
| 449 | |
| 450 | b3 = 0x80; |
| 451 | b3 |= srcval & 0x3f; |
| 452 | |
| 453 | retval = (b1 << 16) | (b2 << 8) | b3; |
| 454 | break; |
| 455 | |
| 456 | case 4: { |
| 457 | /* order of bytes left to right: b1, b2, b3, b4 */ |
| 458 | UInt high_surrogate = srcval; |
| 459 | UInt uvwxy = ((high_surrogate >> 6) & 0xf) + 1; // abcd + 1 |
| 460 | |
| 461 | b1 = 0xf0; |
| 462 | b1 |= uvwxy >> 2; // uvw |
| 463 | |
| 464 | b2 = 0x80; |
| 465 | b2 |= (uvwxy & 0x3) << 4; // xy |
| 466 | b2 |= (high_surrogate >> 2) & 0xf; // efgh |
| 467 | |
| 468 | b3 = 0x80; |
| 469 | b3 |= (high_surrogate & 0x3) << 4; // ij |
| 470 | b3 |= (low_surrogate >> 6) & 0xf; // klmn |
| 471 | |
| 472 | b4 = 0x80; |
| 473 | b4 |= low_surrogate & 0x3f; |
| 474 | |
| 475 | retval = (b1 << 24) | (b2 << 16) | (b3 << 8) | b4; |
| 476 | |
| 477 | invalid_low_surrogate = (low_surrogate & 0xfc00) != 0xdc00; |
| 478 | break; |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | /* At this point RETVAL contains the converted bytes. |
| 483 | Build up the final return value. */ |
| 484 | return (retval << 16) | (num_bytes << 8) | invalid_low_surrogate; |
| 485 | } |
| 486 | |
florian | e711c80 | 2012-07-15 02:25:55 +0000 | [diff] [blame] | 487 | |
| 488 | /*------------------------------------------------------------*/ |
florian | 2a415a1 | 2012-07-21 17:41:36 +0000 | [diff] [blame] | 489 | /*--- Clean helper for CU24. ---*/ |
| 490 | /*------------------------------------------------------------*/ |
| 491 | |
| 492 | /* The function performs a CU24 operation. It returns two things |
| 493 | encoded in an ULong value: |
| 494 | - the 4 converted bytes |
| 495 | - an indication whether LOW_SURROGATE, if any, is invalid |
| 496 | |
| 497 | 64 40 8 0 |
| 498 | +------------------------+-----------------------+ |
| 499 | | 0x0 | converted bytes | invalid_low_surrogate | |
| 500 | +------------------------+-----------------------+ |
| 501 | */ |
| 502 | ULong |
| 503 | s390_do_cu24(UInt srcval, UInt low_surrogate) |
| 504 | { |
| 505 | ULong retval; |
| 506 | UInt invalid_low_surrogate = 0; |
| 507 | |
| 508 | srcval &= 0xffff; |
| 509 | |
| 510 | if ((srcval >= 0x0000 && srcval <= 0xd7ff) || |
| 511 | (srcval >= 0xdc00 && srcval <= 0xffff)) { |
| 512 | retval = srcval; |
| 513 | } else { |
| 514 | /* D800 - DBFF */ |
| 515 | UInt high_surrogate = srcval; |
| 516 | UInt uvwxy = ((high_surrogate >> 6) & 0xf) + 1; // abcd + 1 |
| 517 | UInt efghij = high_surrogate & 0x3f; |
| 518 | UInt klmnoprst = low_surrogate & 0x3ff; |
| 519 | |
| 520 | retval = (uvwxy << 16) | (efghij << 10) | klmnoprst; |
| 521 | |
| 522 | invalid_low_surrogate = (low_surrogate & 0xfc00) != 0xdc00; |
| 523 | } |
| 524 | |
| 525 | /* At this point RETVAL contains the converted bytes. |
| 526 | Build up the final return value. */ |
| 527 | return (retval << 8) | invalid_low_surrogate; |
| 528 | } |
| 529 | |
| 530 | |
| 531 | /*------------------------------------------------------------*/ |
florian | 956194b | 2012-07-28 22:18:32 +0000 | [diff] [blame] | 532 | /*--- Clean helper for CU42. ---*/ |
| 533 | /*------------------------------------------------------------*/ |
| 534 | |
| 535 | /* The function performs a CU42 operation. It returns three things |
| 536 | encoded in an ULong value: |
| 537 | - the converted bytes (at most 4) |
| 538 | - the number of converted bytes (2 or 4; 0 if invalid character) |
| 539 | - an indication whether the UTF-32 character is invalid |
| 540 | |
| 541 | 64 48 16 8 0 |
| 542 | +-------+-----------------+-----------+-------------------+ |
| 543 | | 0x0 | converted bytes | num_bytes | invalid_character | |
| 544 | +-------+-----------------+-----------+-------------------+ |
| 545 | */ |
| 546 | ULong |
| 547 | s390_do_cu42(UInt srcval) |
| 548 | { |
| 549 | ULong retval; |
| 550 | UInt num_bytes, invalid_character = 0; |
| 551 | |
| 552 | if ((srcval >= 0x0000 && srcval <= 0xd7ff) || |
| 553 | (srcval >= 0xdc00 && srcval <= 0xffff)) { |
| 554 | retval = srcval; |
| 555 | num_bytes = 2; |
| 556 | } else if (srcval >= 0x00010000 && srcval <= 0x0010FFFF) { |
| 557 | UInt uvwxy = srcval >> 16; |
| 558 | UInt abcd = (uvwxy - 1) & 0xf; |
| 559 | UInt efghij = (srcval >> 10) & 0x3f; |
| 560 | |
| 561 | UInt high_surrogate = (0xd8 << 8) | (abcd << 6) | efghij; |
| 562 | UInt low_surrogate = (0xdc << 8) | (srcval & 0x3ff); |
| 563 | |
| 564 | retval = (high_surrogate << 16) | low_surrogate; |
| 565 | num_bytes = 4; |
| 566 | } else { |
| 567 | /* D800 - DBFF or 00110000 - FFFFFFFF */ |
| 568 | invalid_character = 1; |
| 569 | retval = num_bytes = 0; /* does not matter; not used */ |
| 570 | } |
| 571 | |
| 572 | /* At this point RETVAL contains the converted bytes. |
| 573 | Build up the final return value. */ |
| 574 | return (retval << 16) | (num_bytes << 8) | invalid_character; |
| 575 | } |
| 576 | |
| 577 | |
| 578 | /*------------------------------------------------------------*/ |
florian | af2194f | 2012-08-06 00:07:54 +0000 | [diff] [blame] | 579 | /*--- Clean helper for CU41. ---*/ |
| 580 | /*------------------------------------------------------------*/ |
| 581 | |
| 582 | /* The function performs a CU41 operation. It returns three things |
| 583 | encoded in an ULong value: |
| 584 | - the converted bytes (at most 4) |
| 585 | - the number of converted bytes (1, 2, 3, or 4; 0 if invalid character) |
| 586 | - an indication whether the UTF-32 character is invalid |
| 587 | |
| 588 | 64 48 16 8 0 |
| 589 | +-------+-----------------+-----------+-------------------+ |
| 590 | | 0x0 | converted bytes | num_bytes | invalid_character | |
| 591 | +-------+-----------------+-----------+-------------------+ |
| 592 | */ |
| 593 | ULong |
| 594 | s390_do_cu41(UInt srcval) |
| 595 | { |
| 596 | ULong retval; |
| 597 | UInt num_bytes, invalid_character = 0; |
| 598 | |
| 599 | if (srcval <= 0x7f) { |
| 600 | retval = srcval; |
| 601 | num_bytes = 1; |
| 602 | } else if (srcval >= 0x80 && srcval <= 0x7ff) { |
| 603 | UInt fghij = srcval >> 6; |
| 604 | UInt klmnop = srcval & 0x3f; |
| 605 | UInt byte1 = (0xc0 | fghij); |
| 606 | UInt byte2 = (0x80 | klmnop); |
| 607 | |
| 608 | retval = (byte1 << 8) | byte2; |
| 609 | num_bytes = 2; |
| 610 | } else if ((srcval >= 0x800 && srcval <= 0xd7ff) || |
| 611 | (srcval >= 0xdc00 && srcval <= 0xffff)) { |
| 612 | UInt abcd = srcval >> 12; |
| 613 | UInt efghij = (srcval >> 6) & 0x3f; |
| 614 | UInt klmnop = srcval & 0x3f; |
| 615 | UInt byte1 = 0xe0 | abcd; |
| 616 | UInt byte2 = 0x80 | efghij; |
| 617 | UInt byte3 = 0x80 | klmnop; |
| 618 | |
| 619 | retval = (byte1 << 16) | (byte2 << 8) | byte3; |
| 620 | num_bytes = 3; |
| 621 | } else if (srcval >= 0x10000 && srcval <= 0x10ffff) { |
| 622 | UInt uvw = (srcval >> 18) & 0x7; |
| 623 | UInt xy = (srcval >> 16) & 0x3; |
| 624 | UInt efgh = (srcval >> 12) & 0xf; |
| 625 | UInt ijklmn = (srcval >> 6) & 0x3f; |
| 626 | UInt opqrst = srcval & 0x3f; |
| 627 | UInt byte1 = 0xf0 | uvw; |
| 628 | UInt byte2 = 0x80 | (xy << 4) | efgh; |
| 629 | UInt byte3 = 0x80 | ijklmn; |
| 630 | UInt byte4 = 0x80 | opqrst; |
| 631 | |
| 632 | retval = (byte1 << 24) | (byte2 << 16) | (byte3 << 8) | byte4; |
| 633 | num_bytes = 4; |
| 634 | } else { |
| 635 | /* d800 ... dbff or 00110000 ... ffffffff */ |
| 636 | invalid_character = 1; |
| 637 | |
| 638 | retval = 0; |
| 639 | num_bytes = 0; |
| 640 | } |
| 641 | |
| 642 | /* At this point RETVAL contains the converted bytes. |
| 643 | Build up the final return value. */ |
| 644 | return (retval << 16) | (num_bytes << 8) | invalid_character; |
| 645 | } |
| 646 | |
| 647 | |
| 648 | /*------------------------------------------------------------*/ |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 649 | /*--- Clean helpers for CU12. ---*/ |
| 650 | /*------------------------------------------------------------*/ |
| 651 | |
| 652 | /* The function looks at the first byte of an UTF-8 character and returns |
| 653 | two things encoded in an ULong value: |
| 654 | |
| 655 | - the number of bytes that need to be read |
| 656 | - an indication whether the UTF-8 character is invalid |
| 657 | |
| 658 | 64 16 8 0 |
| 659 | +-------------------+-------------------+ |
| 660 | | 0x0 | num_bytes | invalid_character | |
| 661 | +-------+-----------+-------------------+ |
| 662 | */ |
| 663 | ULong |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 664 | s390_do_cu12_cu14_helper1(UInt byte, UInt etf3_and_m3_is_1) |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 665 | { |
| 666 | vassert(byte <= 0xff); |
| 667 | |
| 668 | /* Check whether the character is invalid */ |
| 669 | if (byte >= 0x80 && byte <= 0xbf) return 1; |
| 670 | if (byte >= 0xf8) return 1; |
| 671 | |
| 672 | if (etf3_and_m3_is_1) { |
| 673 | if (byte == 0xc0 || byte == 0xc1) return 1; |
| 674 | if (byte >= 0xf5 && byte <= 0xf7) return 1; |
| 675 | } |
| 676 | |
| 677 | /* Character is valid */ |
| 678 | if (byte <= 0x7f) return 1 << 8; // 1 byte |
| 679 | if (byte <= 0xdf) return 2 << 8; // 2 bytes |
| 680 | if (byte <= 0xef) return 3 << 8; // 3 bytes |
| 681 | |
| 682 | return 4 << 8; // 4 bytes |
| 683 | } |
| 684 | |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 685 | /* The function performs a CU12 or CU14 operation. BYTE1, BYTE2, etc are the |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 686 | bytes as read from the input stream, left to right. BYTE1 is a valid |
| 687 | byte. The function returns three things encoded in an ULong value: |
| 688 | |
| 689 | - the converted bytes |
| 690 | - the number of converted bytes (2 or 4; 0 if invalid character) |
| 691 | - an indication whether the UTF-16 character is invalid |
| 692 | |
| 693 | 64 48 16 8 0 |
| 694 | +-------+-----------------+-----------+-------------------+ |
| 695 | | 0x0 | converted bytes | num_bytes | invalid_character | |
| 696 | +-------+-----------------+-----------+-------------------+ |
| 697 | */ |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 698 | static ULong |
| 699 | s390_do_cu12_cu14_helper2(UInt byte1, UInt byte2, UInt byte3, UInt byte4, |
| 700 | ULong stuff, Bool is_cu12) |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 701 | { |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 702 | UInt num_src_bytes = stuff >> 1, etf3_and_m3_is_1 = stuff & 0x1; |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 703 | UInt num_bytes = 0, invalid_character = 0; |
| 704 | ULong retval = 0; |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 705 | |
| 706 | vassert(num_src_bytes <= 4); |
| 707 | |
| 708 | switch (num_src_bytes) { |
| 709 | case 1: |
| 710 | num_bytes = 2; |
| 711 | retval = byte1; |
| 712 | break; |
| 713 | |
| 714 | case 2: { |
| 715 | /* Test validity */ |
| 716 | if (etf3_and_m3_is_1) { |
| 717 | if (byte2 < 0x80 || byte2 > 0xbf) { |
| 718 | invalid_character = 1; |
| 719 | break; |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /* OK */ |
| 724 | UInt fghij = byte1 & 0x1f; |
| 725 | UInt klmnop = byte2 & 0x3f; |
| 726 | |
| 727 | num_bytes = 2; |
| 728 | retval = (fghij << 6) | klmnop; |
| 729 | break; |
| 730 | } |
| 731 | |
| 732 | case 3: { |
| 733 | /* Test validity */ |
| 734 | if (etf3_and_m3_is_1) { |
| 735 | if (byte1 == 0xe0) { |
| 736 | if ((byte2 < 0xa0 || byte2 > 0xbf) || |
| 737 | (byte3 < 0x80 || byte3 > 0xbf)) { |
| 738 | invalid_character = 1; |
| 739 | break; |
| 740 | } |
| 741 | } |
| 742 | if ((byte1 >= 0xe1 && byte1 <= 0xec) || |
| 743 | byte1 == 0xee || byte1 == 0xef) { |
| 744 | if ((byte2 < 0x80 || byte2 > 0xbf) || |
| 745 | (byte3 < 0x80 || byte3 > 0xbf)) { |
| 746 | invalid_character = 1; |
| 747 | break; |
| 748 | } |
| 749 | } |
| 750 | if (byte1 == 0xed) { |
| 751 | if ((byte2 < 0x80 || byte2 > 0x9f) || |
| 752 | (byte3 < 0x80 || byte3 > 0xbf)) { |
| 753 | invalid_character = 1; |
| 754 | break; |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | /* OK */ |
| 760 | UInt abcd = byte1 & 0xf; |
| 761 | UInt efghij = byte2 & 0x3f; |
| 762 | UInt klmnop = byte3 & 0x3f; |
| 763 | |
| 764 | num_bytes = 2; |
| 765 | retval = (abcd << 12) | (efghij << 6) | klmnop; |
| 766 | break; |
| 767 | } |
| 768 | |
| 769 | case 4: { |
| 770 | /* Test validity */ |
| 771 | if (etf3_and_m3_is_1) { |
| 772 | if (byte1 == 0xf0) { |
| 773 | if ((byte2 < 0x90 || byte2 > 0xbf) || |
| 774 | (byte3 < 0x80 || byte3 > 0xbf) || |
| 775 | (byte4 < 0x80 || byte4 > 0xbf)) { |
| 776 | invalid_character = 1; |
| 777 | break; |
| 778 | } |
| 779 | } |
| 780 | if (byte1 == 0xf1 || byte1 == 0xf2 || byte1 == 0xf3) { |
| 781 | if ((byte2 < 0x80 || byte2 > 0xbf) || |
| 782 | (byte3 < 0x80 || byte3 > 0xbf) || |
| 783 | (byte4 < 0x80 || byte4 > 0xbf)) { |
| 784 | invalid_character = 1; |
| 785 | break; |
| 786 | } |
| 787 | } |
| 788 | if (byte1 == 0xf4) { |
| 789 | if ((byte2 < 0x80 || byte2 > 0x8f) || |
| 790 | (byte3 < 0x80 || byte3 > 0xbf) || |
| 791 | (byte4 < 0x80 || byte4 > 0xbf)) { |
| 792 | invalid_character = 1; |
| 793 | break; |
| 794 | } |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | /* OK */ |
| 799 | UInt uvw = byte1 & 0x7; |
| 800 | UInt xy = (byte2 >> 4) & 0x3; |
| 801 | UInt uvwxy = (uvw << 2) | xy; |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 802 | UInt efgh = byte2 & 0xf; |
| 803 | UInt ij = (byte3 >> 4) & 0x3; |
| 804 | UInt klmn = byte3 & 0xf; |
| 805 | UInt opqrst = byte4 & 0x3f; |
| 806 | |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 807 | if (is_cu12) { |
| 808 | UInt abcd = (uvwxy - 1) & 0xf; |
| 809 | UInt high_surrogate = (0xd8 << 8) | (abcd << 6) | (efgh << 2) | ij; |
| 810 | UInt low_surrogate = (0xdc << 8) | (klmn << 6) | opqrst; |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 811 | |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 812 | num_bytes = 4; |
| 813 | retval = (high_surrogate << 16) | low_surrogate; |
| 814 | } else { |
| 815 | num_bytes = 4; |
| 816 | retval = |
| 817 | (uvwxy << 16) | (efgh << 12) | (ij << 10) | (klmn << 6) | opqrst; |
| 818 | } |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 819 | break; |
| 820 | } |
| 821 | } |
| 822 | |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 823 | if (! is_cu12) num_bytes = 4; // for CU14, by definition |
| 824 | |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 825 | /* At this point RETVAL contains the converted bytes. |
| 826 | Build up the final return value. */ |
| 827 | return (retval << 16) | (num_bytes << 8) | invalid_character; |
| 828 | } |
| 829 | |
florian | 3f8a96a | 2012-08-05 02:59:55 +0000 | [diff] [blame] | 830 | ULong |
| 831 | s390_do_cu12_helper2(UInt byte1, UInt byte2, UInt byte3, UInt byte4, |
| 832 | ULong stuff) |
| 833 | { |
| 834 | return s390_do_cu12_cu14_helper2(byte1, byte2, byte3, byte4, stuff, |
| 835 | /* is_cu12 = */ 1); |
| 836 | } |
| 837 | |
| 838 | ULong |
| 839 | s390_do_cu14_helper2(UInt byte1, UInt byte2, UInt byte3, UInt byte4, |
| 840 | ULong stuff) |
| 841 | { |
| 842 | return s390_do_cu12_cu14_helper2(byte1, byte2, byte3, byte4, stuff, |
| 843 | /* is_cu12 = */ 0); |
| 844 | } |
| 845 | |
florian | 6d9b9b2 | 2012-08-03 18:35:39 +0000 | [diff] [blame] | 846 | |
| 847 | /*------------------------------------------------------------*/ |
florian | e711c80 | 2012-07-15 02:25:55 +0000 | [diff] [blame] | 848 | /*--- Clean helper for "convert to binary". ---*/ |
| 849 | /*------------------------------------------------------------*/ |
| 850 | #if defined(VGA_s390x) |
| 851 | UInt |
| 852 | s390_do_cvb(ULong decimal) |
| 853 | { |
| 854 | UInt binary; |
| 855 | |
| 856 | __asm__ volatile ( |
| 857 | "cvb %[result],%[input]\n\t" |
| 858 | : [result] "=d"(binary) |
| 859 | : [input] "m"(decimal) |
| 860 | ); |
| 861 | |
| 862 | return binary; |
| 863 | } |
| 864 | |
| 865 | #else |
| 866 | UInt s390_do_cvb(ULong decimal) { return 0; } |
| 867 | #endif |
| 868 | |
| 869 | |
| 870 | /*------------------------------------------------------------*/ |
| 871 | /*--- Clean helper for "convert to decimal". ---*/ |
| 872 | /*------------------------------------------------------------*/ |
| 873 | #if defined(VGA_s390x) |
| 874 | ULong |
| 875 | s390_do_cvd(ULong binary_in) |
| 876 | { |
| 877 | UInt binary = binary_in & 0xffffffffULL; |
| 878 | ULong decimal; |
| 879 | |
| 880 | __asm__ volatile ( |
| 881 | "cvd %[input],%[result]\n\t" |
| 882 | : [result] "=m"(decimal) |
| 883 | : [input] "d"(binary) |
| 884 | ); |
| 885 | |
| 886 | return decimal; |
| 887 | } |
| 888 | |
| 889 | #else |
| 890 | ULong s390_do_cvd(ULong binary) { return 0; } |
| 891 | #endif |
| 892 | |
florian | 8c88cb6 | 2012-08-26 18:58:13 +0000 | [diff] [blame] | 893 | /*------------------------------------------------------------*/ |
| 894 | /*--- Clean helper for "Extract cache attribute". ---*/ |
| 895 | /*------------------------------------------------------------*/ |
| 896 | #if defined(VGA_s390x) |
| 897 | ULong |
| 898 | s390_do_ecag(ULong op2addr) |
| 899 | { |
| 900 | ULong result; |
| 901 | |
| 902 | __asm__ volatile(".insn rsy,0xEB000000004C,%[out],0,0(%[in])\n\t" |
| 903 | : [out] "=d"(result) |
| 904 | : [in] "d"(op2addr)); |
| 905 | return result; |
| 906 | } |
| 907 | |
| 908 | #else |
| 909 | ULong s390_do_ecag(ULong op2addr) { return 0; } |
| 910 | #endif |
florian | e711c80 | 2012-07-15 02:25:55 +0000 | [diff] [blame] | 911 | |
florian | 933065d | 2011-07-11 01:48:02 +0000 | [diff] [blame] | 912 | /*------------------------------------------------------------*/ |
florian | 78d5ef7 | 2013-05-11 15:02:58 +0000 | [diff] [blame] | 913 | /*--- Clean helper for "Perform Floating Point Operation". ---*/ |
| 914 | /*------------------------------------------------------------*/ |
| 915 | #if defined(VGA_s390x) |
| 916 | UInt |
| 917 | s390_do_pfpo(UInt gpr0) |
| 918 | { |
| 919 | UChar rm; |
| 920 | UChar op1_ty, op2_ty; |
| 921 | |
| 922 | rm = gpr0 & 0xf; |
| 923 | if (rm > 1 && rm < 8) |
| 924 | return EmFail_S390X_invalid_PFPO_rounding_mode; |
| 925 | |
| 926 | op1_ty = (gpr0 >> 16) & 0xff; // gpr0[40:47] |
| 927 | op2_ty = (gpr0 >> 8) & 0xff; // gpr0[48:55] |
| 928 | /* Operand type must be BFP 32, 64, 128 or DFP 32, 64, 128 |
| 929 | which correspond to 0x5, 0x6, 0x7, 0x8, 0x9, 0xa respectively. |
| 930 | Any other operand type value is unsupported */ |
| 931 | if ((op1_ty == op2_ty) || |
| 932 | (op1_ty < 0x5 || op1_ty > 0xa) || |
| 933 | (op2_ty < 0x5 || op2_ty > 0xa)) |
| 934 | return EmFail_S390X_invalid_PFPO_function; |
| 935 | |
| 936 | return EmNote_NONE; |
| 937 | } |
| 938 | #else |
| 939 | UInt s390_do_pfpo(UInt gpr0) { return 0; } |
| 940 | #endif |
| 941 | |
| 942 | /*------------------------------------------------------------*/ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 943 | /*--- Helper for condition code. ---*/ |
| 944 | /*------------------------------------------------------------*/ |
| 945 | |
florian | 83f60b5 | 2013-01-13 02:34:28 +0000 | [diff] [blame] | 946 | /* Convert an IRRoundingMode value to s390_bfp_round_t */ |
florian | 3d80fad | 2012-09-13 15:58:01 +0000 | [diff] [blame] | 947 | #if defined(VGA_s390x) |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 948 | static s390_bfp_round_t |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 949 | decode_bfp_rounding_mode(UInt irrm) |
| 950 | { |
| 951 | switch (irrm) { |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 952 | case Irrm_NEAREST: return S390_BFP_ROUND_NEAREST_EVEN; |
| 953 | case Irrm_NegINF: return S390_BFP_ROUND_NEGINF; |
| 954 | case Irrm_PosINF: return S390_BFP_ROUND_POSINF; |
| 955 | case Irrm_ZERO: return S390_BFP_ROUND_ZERO; |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 956 | } |
| 957 | vpanic("decode_bfp_rounding_mode"); |
| 958 | } |
florian | 3d80fad | 2012-09-13 15:58:01 +0000 | [diff] [blame] | 959 | #endif |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 960 | |
| 961 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 962 | #define S390_CC_FOR_BINARY(opcode,cc_dep1,cc_dep2) \ |
| 963 | ({ \ |
| 964 | __asm__ volatile ( \ |
| 965 | opcode " %[op1],%[op2]\n\t" \ |
| 966 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [op1] "+d"(cc_dep1) \ |
| 967 | : [op2] "d"(cc_dep2) \ |
| 968 | : "cc");\ |
| 969 | psw >> 28; /* cc */ \ |
| 970 | }) |
| 971 | |
| 972 | #define S390_CC_FOR_TERNARY_SUBB(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 973 | ({ \ |
| 974 | /* Recover the original DEP2 value. See comment near s390_cc_thunk_put3 \ |
| 975 | for rationale. */ \ |
| 976 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 977 | __asm__ volatile ( \ |
| 978 | "lghi 0,1\n\t" \ |
| 979 | "sr 0,%[op3]\n\t" /* borrow to cc */ \ |
| 980 | opcode " %[op1],%[op2]\n\t" /* then redo the op */\ |
| 981 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [op1] "+&d"(cc_dep1) \ |
| 982 | : [op2] "d"(cc_dep2), [op3] "d"(cc_ndep) \ |
| 983 | : "0", "cc");\ |
| 984 | psw >> 28; /* cc */ \ |
| 985 | }) |
| 986 | |
| 987 | #define S390_CC_FOR_TERNARY_ADDC(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 988 | ({ \ |
| 989 | /* Recover the original DEP2 value. See comment near s390_cc_thunk_put3 \ |
| 990 | for rationale. */ \ |
| 991 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 992 | __asm__ volatile ( \ |
| 993 | "lgfr 0,%[op3]\n\t" /* first load cc_ndep */ \ |
| 994 | "aghi 0,0\n\t" /* and convert it into a cc */ \ |
| 995 | opcode " %[op1],%[op2]\n\t" /* then redo the op */\ |
| 996 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [op1] "+&d"(cc_dep1) \ |
| 997 | : [op2] "d"(cc_dep2), [op3] "d"(cc_ndep) \ |
| 998 | : "0", "cc");\ |
| 999 | psw >> 28; /* cc */ \ |
| 1000 | }) |
| 1001 | |
| 1002 | |
| 1003 | #define S390_CC_FOR_BFP_RESULT(opcode,cc_dep1) \ |
| 1004 | ({ \ |
| 1005 | __asm__ volatile ( \ |
| 1006 | opcode " 0,%[op]\n\t" \ |
| 1007 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1008 | : [op] "f"(cc_dep1) \ |
| 1009 | : "cc", "f0");\ |
| 1010 | psw >> 28; /* cc */ \ |
| 1011 | }) |
| 1012 | |
| 1013 | #define S390_CC_FOR_BFP128_RESULT(hi,lo) \ |
| 1014 | ({ \ |
| 1015 | __asm__ volatile ( \ |
| 1016 | "ldr 4,%[high]\n\t" \ |
| 1017 | "ldr 6,%[low]\n\t" \ |
| 1018 | "ltxbr 0,4\n\t" \ |
| 1019 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1020 | : [high] "f"(hi), [low] "f"(lo) \ |
| 1021 | : "cc", "f0", "f2", "f4", "f6");\ |
| 1022 | psw >> 28; /* cc */ \ |
| 1023 | }) |
| 1024 | |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1025 | #define S390_CC_FOR_BFP_CONVERT_AUX(opcode,cc_dep1,rounding_mode) \ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1026 | ({ \ |
| 1027 | __asm__ volatile ( \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1028 | opcode " 0," #rounding_mode ",%[op]\n\t" \ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1029 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1030 | : [op] "f"(cc_dep1) \ |
| 1031 | : "cc", "r0");\ |
| 1032 | psw >> 28; /* cc */ \ |
| 1033 | }) |
| 1034 | |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1035 | #define S390_CC_FOR_BFP_CONVERT(opcode,cc_dep1,cc_dep2) \ |
| 1036 | ({ \ |
| 1037 | UInt cc; \ |
| 1038 | switch (decode_bfp_rounding_mode(cc_dep2)) { \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1039 | case S390_BFP_ROUND_NEAREST_EVEN: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1040 | cc = S390_CC_FOR_BFP_CONVERT_AUX(opcode,cc_dep1,4); \ |
| 1041 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1042 | case S390_BFP_ROUND_ZERO: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1043 | cc = S390_CC_FOR_BFP_CONVERT_AUX(opcode,cc_dep1,5); \ |
| 1044 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1045 | case S390_BFP_ROUND_POSINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1046 | cc = S390_CC_FOR_BFP_CONVERT_AUX(opcode,cc_dep1,6); \ |
| 1047 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1048 | case S390_BFP_ROUND_NEGINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1049 | cc = S390_CC_FOR_BFP_CONVERT_AUX(opcode,cc_dep1,7); \ |
| 1050 | break; \ |
| 1051 | default: \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1052 | vpanic("unexpected bfp rounding mode"); \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1053 | } \ |
| 1054 | cc; \ |
| 1055 | }) |
| 1056 | |
| 1057 | #define S390_CC_FOR_BFP_UCONVERT_AUX(opcode,cc_dep1,rounding_mode) \ |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1058 | ({ \ |
| 1059 | __asm__ volatile ( \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1060 | opcode ",0,%[op]," #rounding_mode ",0\n\t" \ |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1061 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1062 | : [op] "f"(cc_dep1) \ |
| 1063 | : "cc", "r0");\ |
| 1064 | psw >> 28; /* cc */ \ |
| 1065 | }) |
| 1066 | |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1067 | #define S390_CC_FOR_BFP_UCONVERT(opcode,cc_dep1,cc_dep2) \ |
| 1068 | ({ \ |
| 1069 | UInt cc; \ |
| 1070 | switch (decode_bfp_rounding_mode(cc_dep2)) { \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1071 | case S390_BFP_ROUND_NEAREST_EVEN: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1072 | cc = S390_CC_FOR_BFP_UCONVERT_AUX(opcode,cc_dep1,4); \ |
| 1073 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1074 | case S390_BFP_ROUND_ZERO: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1075 | cc = S390_CC_FOR_BFP_UCONVERT_AUX(opcode,cc_dep1,5); \ |
| 1076 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1077 | case S390_BFP_ROUND_POSINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1078 | cc = S390_CC_FOR_BFP_UCONVERT_AUX(opcode,cc_dep1,6); \ |
| 1079 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1080 | case S390_BFP_ROUND_NEGINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1081 | cc = S390_CC_FOR_BFP_UCONVERT_AUX(opcode,cc_dep1,7); \ |
| 1082 | break; \ |
| 1083 | default: \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1084 | vpanic("unexpected bfp rounding mode"); \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1085 | } \ |
| 1086 | cc; \ |
| 1087 | }) |
| 1088 | |
| 1089 | #define S390_CC_FOR_BFP128_CONVERT_AUX(opcode,hi,lo,rounding_mode) \ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1090 | ({ \ |
| 1091 | __asm__ volatile ( \ |
| 1092 | "ldr 4,%[high]\n\t" \ |
| 1093 | "ldr 6,%[low]\n\t" \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1094 | opcode " 0," #rounding_mode ",4\n\t" \ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1095 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1096 | : [high] "f"(hi), [low] "f"(lo) \ |
| 1097 | : "cc", "r0", "f4", "f6");\ |
| 1098 | psw >> 28; /* cc */ \ |
| 1099 | }) |
| 1100 | |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1101 | #define S390_CC_FOR_BFP128_CONVERT(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 1102 | ({ \ |
| 1103 | UInt cc; \ |
| 1104 | /* Recover the original DEP2 value. See comment near \ |
| 1105 | s390_cc_thunk_put3 for rationale. */ \ |
| 1106 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 1107 | switch (decode_bfp_rounding_mode(cc_ndep)) { \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1108 | case S390_BFP_ROUND_NEAREST_EVEN: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1109 | cc = S390_CC_FOR_BFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,4); \ |
| 1110 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1111 | case S390_BFP_ROUND_ZERO: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1112 | cc = S390_CC_FOR_BFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,5); \ |
| 1113 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1114 | case S390_BFP_ROUND_POSINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1115 | cc = S390_CC_FOR_BFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,6); \ |
| 1116 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1117 | case S390_BFP_ROUND_NEGINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1118 | cc = S390_CC_FOR_BFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,7); \ |
| 1119 | break; \ |
| 1120 | default: \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1121 | vpanic("unexpected bfp rounding mode"); \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1122 | } \ |
| 1123 | cc; \ |
| 1124 | }) |
| 1125 | |
| 1126 | #define S390_CC_FOR_BFP128_UCONVERT_AUX(opcode,hi,lo,rounding_mode) \ |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1127 | ({ \ |
| 1128 | __asm__ volatile ( \ |
| 1129 | "ldr 4,%[high]\n\t" \ |
| 1130 | "ldr 6,%[low]\n\t" \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1131 | opcode ",0,4," #rounding_mode ",0\n\t" \ |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1132 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1133 | : [high] "f"(hi), [low] "f"(lo) \ |
| 1134 | : "cc", "r0", "f4", "f6");\ |
| 1135 | psw >> 28; /* cc */ \ |
| 1136 | }) |
| 1137 | |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1138 | #define S390_CC_FOR_BFP128_UCONVERT(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 1139 | ({ \ |
| 1140 | UInt cc; \ |
| 1141 | /* Recover the original DEP2 value. See comment near \ |
| 1142 | s390_cc_thunk_put3 for rationale. */ \ |
| 1143 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 1144 | switch (decode_bfp_rounding_mode(cc_ndep)) { \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1145 | case S390_BFP_ROUND_NEAREST_EVEN: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1146 | cc = S390_CC_FOR_BFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,4); \ |
| 1147 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1148 | case S390_BFP_ROUND_ZERO: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1149 | cc = S390_CC_FOR_BFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,5); \ |
| 1150 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1151 | case S390_BFP_ROUND_POSINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1152 | cc = S390_CC_FOR_BFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,6); \ |
| 1153 | break; \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1154 | case S390_BFP_ROUND_NEGINF: \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1155 | cc = S390_CC_FOR_BFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,7); \ |
| 1156 | break; \ |
| 1157 | default: \ |
florian | 125e20d | 2012-10-07 15:42:37 +0000 | [diff] [blame] | 1158 | vpanic("unexpected bfp rounding mode"); \ |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1159 | } \ |
| 1160 | cc; \ |
| 1161 | }) |
| 1162 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1163 | #define S390_CC_FOR_BFP_TDC(opcode,cc_dep1,cc_dep2) \ |
| 1164 | ({ \ |
| 1165 | __asm__ volatile ( \ |
| 1166 | opcode " %[value],0(%[class])\n\t" \ |
| 1167 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1168 | : [value] "f"(cc_dep1), \ |
| 1169 | [class] "a"(cc_dep2) \ |
| 1170 | : "cc");\ |
| 1171 | psw >> 28; /* cc */ \ |
| 1172 | }) |
| 1173 | |
| 1174 | #define S390_CC_FOR_BFP128_TDC(cc_dep1,cc_dep2,cc_ndep) \ |
| 1175 | ({ \ |
florian | cf1527c | 2012-12-27 20:59:43 +0000 | [diff] [blame] | 1176 | /* Recover the original DEP2 value. See comment near \ |
| 1177 | s390_cc_thunk_put1f128Z for rationale. */ \ |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1178 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 1179 | __asm__ volatile ( \ |
| 1180 | "ldr 4,%[high]\n\t" \ |
| 1181 | "ldr 6,%[low]\n\t" \ |
| 1182 | "tcxb 4,0(%[class])\n\t" \ |
| 1183 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1184 | : [high] "f"(cc_dep1), [low] "f"(cc_dep2), \ |
| 1185 | [class] "a"(cc_ndep) \ |
| 1186 | : "cc", "f4", "f6");\ |
| 1187 | psw >> 28; /* cc */ \ |
| 1188 | }) |
| 1189 | |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1190 | /* Convert an IRRoundingMode value to s390_dfp_round_t */ |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1191 | #if defined(VGA_s390x) |
| 1192 | static s390_dfp_round_t |
| 1193 | decode_dfp_rounding_mode(UInt irrm) |
| 1194 | { |
| 1195 | switch (irrm) { |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1196 | case Irrm_NEAREST: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1197 | return S390_DFP_ROUND_NEAREST_EVEN_4; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1198 | case Irrm_NegINF: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1199 | return S390_DFP_ROUND_NEGINF_7; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1200 | case Irrm_PosINF: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1201 | return S390_DFP_ROUND_POSINF_6; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1202 | case Irrm_ZERO: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1203 | return S390_DFP_ROUND_ZERO_5; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1204 | case Irrm_NEAREST_TIE_AWAY_0: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1205 | return S390_DFP_ROUND_NEAREST_TIE_AWAY_0_1; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1206 | case Irrm_PREPARE_SHORTER: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1207 | return S390_DFP_ROUND_PREPARE_SHORT_3; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1208 | case Irrm_AWAY_FROM_ZERO: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1209 | return S390_DFP_ROUND_AWAY_0; |
florian | 79e5a48 | 2013-06-06 19:12:46 +0000 | [diff] [blame] | 1210 | case Irrm_NEAREST_TIE_TOWARD_0: |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1211 | return S390_DFP_ROUND_NEAREST_TIE_TOWARD_0; |
| 1212 | } |
| 1213 | vpanic("decode_dfp_rounding_mode"); |
| 1214 | } |
| 1215 | #endif |
| 1216 | |
florian | 1239020 | 2012-11-10 22:34:14 +0000 | [diff] [blame] | 1217 | #define S390_CC_FOR_DFP_RESULT(cc_dep1) \ |
| 1218 | ({ \ |
| 1219 | __asm__ volatile ( \ |
| 1220 | ".insn rre, 0xb3d60000,0,%[op]\n\t" /* LTDTR */ \ |
| 1221 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1222 | : [op] "f"(cc_dep1) \ |
| 1223 | : "cc", "f0"); \ |
| 1224 | psw >> 28; /* cc */ \ |
| 1225 | }) |
| 1226 | |
florian | e38f641 | 2012-12-21 17:32:12 +0000 | [diff] [blame] | 1227 | #define S390_CC_FOR_DFP128_RESULT(hi,lo) \ |
| 1228 | ({ \ |
| 1229 | __asm__ volatile ( \ |
florian | cf1527c | 2012-12-27 20:59:43 +0000 | [diff] [blame] | 1230 | "ldr 4,%[high]\n\t" \ |
| 1231 | "ldr 6,%[low]\n\t" \ |
| 1232 | ".insn rre, 0xb3de0000,0,4\n\t" /* LTXTR */ \ |
| 1233 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1234 | : [high] "f"(hi), [low] "f"(lo) \ |
| 1235 | : "cc", "f0", "f2", "f4", "f6"); \ |
florian | e38f641 | 2012-12-21 17:32:12 +0000 | [diff] [blame] | 1236 | psw >> 28; /* cc */ \ |
| 1237 | }) |
| 1238 | |
florian | ce9e3db | 2012-12-27 20:14:03 +0000 | [diff] [blame] | 1239 | #define S390_CC_FOR_DFP_TD(opcode,cc_dep1,cc_dep2) \ |
| 1240 | ({ \ |
| 1241 | __asm__ volatile ( \ |
| 1242 | opcode ",%[value],0(%[class])\n\t" \ |
| 1243 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1244 | : [value] "f"(cc_dep1), \ |
| 1245 | [class] "a"(cc_dep2) \ |
| 1246 | : "cc"); \ |
| 1247 | psw >> 28; /* cc */ \ |
| 1248 | }) |
| 1249 | |
| 1250 | #define S390_CC_FOR_DFP128_TD(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 1251 | ({ \ |
| 1252 | /* Recover the original DEP2 value. See comment near \ |
| 1253 | s390_cc_thunk_put1d128Z for rationale. */ \ |
| 1254 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 1255 | __asm__ volatile ( \ |
| 1256 | "ldr 4,%[high]\n\t" \ |
| 1257 | "ldr 6,%[low]\n\t" \ |
| 1258 | opcode ",4,0(%[class])\n\t" \ |
| 1259 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1260 | : [high] "f"(cc_dep1), [low] "f"(cc_dep2), \ |
| 1261 | [class] "a"(cc_ndep) \ |
| 1262 | : "cc", "f4", "f6"); \ |
| 1263 | psw >> 28; /* cc */ \ |
| 1264 | }) |
| 1265 | |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1266 | #define S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,rounding_mode) \ |
| 1267 | ({ \ |
| 1268 | __asm__ volatile ( \ |
| 1269 | opcode ",0,%[op]," #rounding_mode ",0\n\t" \ |
| 1270 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1271 | : [op] "f"(cc_dep1) \ |
| 1272 | : "cc", "r0"); \ |
| 1273 | psw >> 28; /* cc */ \ |
| 1274 | }) |
| 1275 | |
| 1276 | #define S390_CC_FOR_DFP_CONVERT(opcode,cc_dep1,cc_dep2) \ |
| 1277 | ({ \ |
| 1278 | UInt cc; \ |
| 1279 | switch (decode_dfp_rounding_mode(cc_dep2)) { \ |
| 1280 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_1: \ |
| 1281 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_12: \ |
| 1282 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,1); \ |
| 1283 | break; \ |
| 1284 | case S390_DFP_ROUND_PREPARE_SHORT_3: \ |
| 1285 | case S390_DFP_ROUND_PREPARE_SHORT_15: \ |
| 1286 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,3); \ |
| 1287 | break; \ |
| 1288 | case S390_DFP_ROUND_NEAREST_EVEN_4: \ |
| 1289 | case S390_DFP_ROUND_NEAREST_EVEN_8: \ |
| 1290 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,4); \ |
| 1291 | break; \ |
| 1292 | case S390_DFP_ROUND_ZERO_5: \ |
| 1293 | case S390_DFP_ROUND_ZERO_9: \ |
| 1294 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,5); \ |
| 1295 | break; \ |
| 1296 | case S390_DFP_ROUND_POSINF_6: \ |
| 1297 | case S390_DFP_ROUND_POSINF_10: \ |
| 1298 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,6); \ |
| 1299 | break; \ |
| 1300 | case S390_DFP_ROUND_NEGINF_7: \ |
| 1301 | case S390_DFP_ROUND_NEGINF_11: \ |
| 1302 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,7); \ |
| 1303 | break; \ |
| 1304 | case S390_DFP_ROUND_NEAREST_TIE_TOWARD_0: \ |
| 1305 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,13); \ |
| 1306 | break; \ |
| 1307 | case S390_DFP_ROUND_AWAY_0: \ |
| 1308 | cc = S390_CC_FOR_DFP_CONVERT_AUX(opcode,cc_dep1,14); \ |
| 1309 | break; \ |
| 1310 | default: \ |
| 1311 | vpanic("unexpected dfp rounding mode"); \ |
| 1312 | } \ |
| 1313 | cc; \ |
| 1314 | }) |
| 1315 | |
| 1316 | #define S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,rounding_mode) \ |
| 1317 | ({ \ |
| 1318 | __asm__ volatile ( \ |
| 1319 | opcode ",0,%[op]," #rounding_mode ",0\n\t" \ |
| 1320 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1321 | : [op] "f"(cc_dep1) \ |
| 1322 | : "cc", "r0"); \ |
| 1323 | psw >> 28; /* cc */ \ |
| 1324 | }) |
| 1325 | |
| 1326 | #define S390_CC_FOR_DFP_UCONVERT(opcode,cc_dep1,cc_dep2) \ |
| 1327 | ({ \ |
| 1328 | UInt cc; \ |
| 1329 | switch (decode_dfp_rounding_mode(cc_dep2)) { \ |
| 1330 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_1: \ |
| 1331 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_12: \ |
| 1332 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,1); \ |
| 1333 | break; \ |
| 1334 | case S390_DFP_ROUND_PREPARE_SHORT_3: \ |
| 1335 | case S390_DFP_ROUND_PREPARE_SHORT_15: \ |
| 1336 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,3); \ |
| 1337 | break; \ |
| 1338 | case S390_DFP_ROUND_NEAREST_EVEN_4: \ |
| 1339 | case S390_DFP_ROUND_NEAREST_EVEN_8: \ |
| 1340 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,4); \ |
| 1341 | break; \ |
| 1342 | case S390_DFP_ROUND_ZERO_5: \ |
| 1343 | case S390_DFP_ROUND_ZERO_9: \ |
| 1344 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,5); \ |
| 1345 | break; \ |
| 1346 | case S390_DFP_ROUND_POSINF_6: \ |
| 1347 | case S390_DFP_ROUND_POSINF_10: \ |
| 1348 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,6); \ |
| 1349 | break; \ |
| 1350 | case S390_DFP_ROUND_NEGINF_7: \ |
| 1351 | case S390_DFP_ROUND_NEGINF_11: \ |
| 1352 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,7); \ |
| 1353 | break; \ |
| 1354 | case S390_DFP_ROUND_NEAREST_TIE_TOWARD_0: \ |
| 1355 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,13); \ |
| 1356 | break; \ |
| 1357 | case S390_DFP_ROUND_AWAY_0: \ |
| 1358 | cc = S390_CC_FOR_DFP_UCONVERT_AUX(opcode,cc_dep1,14); \ |
| 1359 | break; \ |
| 1360 | default: \ |
| 1361 | vpanic("unexpected dfp rounding mode"); \ |
| 1362 | } \ |
| 1363 | cc; \ |
| 1364 | }) |
| 1365 | |
| 1366 | #define S390_CC_FOR_DFP128_CONVERT_AUX(opcode,hi,lo,rounding_mode) \ |
| 1367 | ({ \ |
| 1368 | __asm__ volatile ( \ |
| 1369 | "ldr 4,%[high]\n\t" \ |
| 1370 | "ldr 6,%[low]\n\t" \ |
| 1371 | opcode ",0,4," #rounding_mode ",0\n\t" \ |
| 1372 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1373 | : [high] "f"(hi), [low] "f"(lo) \ |
| 1374 | : "cc", "r0", "f4", "f6"); \ |
| 1375 | psw >> 28; /* cc */ \ |
| 1376 | }) |
| 1377 | |
| 1378 | #define S390_CC_FOR_DFP128_CONVERT(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 1379 | ({ \ |
| 1380 | UInt cc; \ |
| 1381 | /* Recover the original DEP2 value. See comment near \ |
| 1382 | s390_cc_thunk_put3 for rationale. */ \ |
| 1383 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 1384 | switch (decode_dfp_rounding_mode(cc_ndep)) { \ |
| 1385 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_1: \ |
| 1386 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_12: \ |
| 1387 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,1); \ |
| 1388 | break; \ |
| 1389 | case S390_DFP_ROUND_PREPARE_SHORT_3: \ |
| 1390 | case S390_DFP_ROUND_PREPARE_SHORT_15: \ |
| 1391 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,3); \ |
| 1392 | break; \ |
| 1393 | case S390_DFP_ROUND_NEAREST_EVEN_4: \ |
| 1394 | case S390_DFP_ROUND_NEAREST_EVEN_8: \ |
| 1395 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,4); \ |
| 1396 | break; \ |
| 1397 | case S390_DFP_ROUND_ZERO_5: \ |
| 1398 | case S390_DFP_ROUND_ZERO_9: \ |
| 1399 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,5); \ |
| 1400 | break; \ |
| 1401 | case S390_DFP_ROUND_POSINF_6: \ |
| 1402 | case S390_DFP_ROUND_POSINF_10: \ |
| 1403 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,6); \ |
| 1404 | break; \ |
| 1405 | case S390_DFP_ROUND_NEGINF_7: \ |
| 1406 | case S390_DFP_ROUND_NEGINF_11: \ |
| 1407 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,7); \ |
| 1408 | break; \ |
| 1409 | case S390_DFP_ROUND_NEAREST_TIE_TOWARD_0: \ |
| 1410 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,13); \ |
| 1411 | break; \ |
| 1412 | case S390_DFP_ROUND_AWAY_0: \ |
| 1413 | cc = S390_CC_FOR_DFP128_CONVERT_AUX(opcode,cc_dep1,cc_dep2,14); \ |
| 1414 | break; \ |
| 1415 | default: \ |
| 1416 | vpanic("unexpected dfp rounding mode"); \ |
| 1417 | } \ |
| 1418 | cc; \ |
| 1419 | }) |
| 1420 | |
| 1421 | #define S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,hi,lo,rounding_mode) \ |
| 1422 | ({ \ |
| 1423 | __asm__ volatile ( \ |
| 1424 | "ldr 4,%[high]\n\t" \ |
| 1425 | "ldr 6,%[low]\n\t" \ |
| 1426 | opcode ",0,4," #rounding_mode ",0\n\t" \ |
| 1427 | "ipm %[psw]\n\t" : [psw] "=d"(psw) \ |
| 1428 | : [high] "f"(hi), [low] "f"(lo) \ |
| 1429 | : "cc", "r0", "f4", "f6"); \ |
| 1430 | psw >> 28; /* cc */ \ |
| 1431 | }) |
| 1432 | |
| 1433 | #define S390_CC_FOR_DFP128_UCONVERT(opcode,cc_dep1,cc_dep2,cc_ndep) \ |
| 1434 | ({ \ |
| 1435 | UInt cc; \ |
| 1436 | /* Recover the original DEP2 value. See comment near \ |
| 1437 | s390_cc_thunk_put3 for rationale. */ \ |
| 1438 | cc_dep2 = cc_dep2 ^ cc_ndep; \ |
| 1439 | switch (decode_dfp_rounding_mode(cc_ndep)) { \ |
| 1440 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_1: \ |
| 1441 | case S390_DFP_ROUND_NEAREST_TIE_AWAY_0_12: \ |
| 1442 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,1); \ |
| 1443 | break; \ |
| 1444 | case S390_DFP_ROUND_PREPARE_SHORT_3: \ |
| 1445 | case S390_DFP_ROUND_PREPARE_SHORT_15: \ |
| 1446 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,3); \ |
| 1447 | break; \ |
| 1448 | case S390_DFP_ROUND_NEAREST_EVEN_4: \ |
| 1449 | case S390_DFP_ROUND_NEAREST_EVEN_8: \ |
| 1450 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,4); \ |
| 1451 | break; \ |
| 1452 | case S390_DFP_ROUND_ZERO_5: \ |
| 1453 | case S390_DFP_ROUND_ZERO_9: \ |
| 1454 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,5); \ |
| 1455 | break; \ |
| 1456 | case S390_DFP_ROUND_POSINF_6: \ |
| 1457 | case S390_DFP_ROUND_POSINF_10: \ |
| 1458 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,6); \ |
| 1459 | break; \ |
| 1460 | case S390_DFP_ROUND_NEGINF_7: \ |
| 1461 | case S390_DFP_ROUND_NEGINF_11: \ |
| 1462 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,7); \ |
| 1463 | break; \ |
| 1464 | case S390_DFP_ROUND_NEAREST_TIE_TOWARD_0: \ |
| 1465 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,13); \ |
| 1466 | break; \ |
| 1467 | case S390_DFP_ROUND_AWAY_0: \ |
| 1468 | cc = S390_CC_FOR_DFP128_UCONVERT_AUX(opcode,cc_dep1,cc_dep2,14); \ |
| 1469 | break; \ |
| 1470 | default: \ |
| 1471 | vpanic("unexpected dfp rounding mode"); \ |
| 1472 | } \ |
| 1473 | cc; \ |
| 1474 | }) |
| 1475 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1476 | |
| 1477 | /* Return the value of the condition code from the supplied thunk parameters. |
| 1478 | This is not the value of the PSW. It is the value of the 2 CC bits within |
| 1479 | the PSW. The returned value is thusly in the interval [0:3]. */ |
| 1480 | UInt |
| 1481 | s390_calculate_cc(ULong cc_op, ULong cc_dep1, ULong cc_dep2, ULong cc_ndep) |
| 1482 | { |
| 1483 | #if defined(VGA_s390x) |
| 1484 | UInt psw; |
| 1485 | |
| 1486 | switch (cc_op) { |
| 1487 | |
| 1488 | case S390_CC_OP_BITWISE: |
| 1489 | return S390_CC_FOR_BINARY("ogr", cc_dep1, (ULong)0); |
| 1490 | |
| 1491 | case S390_CC_OP_SIGNED_COMPARE: |
| 1492 | return S390_CC_FOR_BINARY("cgr", cc_dep1, cc_dep2); |
| 1493 | |
| 1494 | case S390_CC_OP_UNSIGNED_COMPARE: |
| 1495 | return S390_CC_FOR_BINARY("clgr", cc_dep1, cc_dep2); |
| 1496 | |
| 1497 | case S390_CC_OP_SIGNED_ADD_64: |
| 1498 | return S390_CC_FOR_BINARY("agr", cc_dep1, cc_dep2); |
| 1499 | |
| 1500 | case S390_CC_OP_SIGNED_ADD_32: |
| 1501 | return S390_CC_FOR_BINARY("ar", cc_dep1, cc_dep2); |
| 1502 | |
| 1503 | case S390_CC_OP_SIGNED_SUB_64: |
| 1504 | return S390_CC_FOR_BINARY("sgr", cc_dep1, cc_dep2); |
| 1505 | |
| 1506 | case S390_CC_OP_SIGNED_SUB_32: |
| 1507 | return S390_CC_FOR_BINARY("sr", cc_dep1, cc_dep2); |
| 1508 | |
| 1509 | case S390_CC_OP_UNSIGNED_ADD_64: |
| 1510 | return S390_CC_FOR_BINARY("algr", cc_dep1, cc_dep2); |
| 1511 | |
| 1512 | case S390_CC_OP_UNSIGNED_ADD_32: |
| 1513 | return S390_CC_FOR_BINARY("alr", cc_dep1, cc_dep2); |
| 1514 | |
| 1515 | case S390_CC_OP_UNSIGNED_ADDC_64: |
| 1516 | return S390_CC_FOR_TERNARY_ADDC("alcgr", cc_dep1, cc_dep2, cc_ndep); |
| 1517 | |
| 1518 | case S390_CC_OP_UNSIGNED_ADDC_32: |
| 1519 | return S390_CC_FOR_TERNARY_ADDC("alcr", cc_dep1, cc_dep2, cc_ndep); |
| 1520 | |
| 1521 | case S390_CC_OP_UNSIGNED_SUB_64: |
| 1522 | return S390_CC_FOR_BINARY("slgr", cc_dep1, cc_dep2); |
| 1523 | |
| 1524 | case S390_CC_OP_UNSIGNED_SUB_32: |
| 1525 | return S390_CC_FOR_BINARY("slr", cc_dep1, cc_dep2); |
| 1526 | |
| 1527 | case S390_CC_OP_UNSIGNED_SUBB_64: |
| 1528 | return S390_CC_FOR_TERNARY_SUBB("slbgr", cc_dep1, cc_dep2, cc_ndep); |
| 1529 | |
| 1530 | case S390_CC_OP_UNSIGNED_SUBB_32: |
| 1531 | return S390_CC_FOR_TERNARY_SUBB("slbr", cc_dep1, cc_dep2, cc_ndep); |
| 1532 | |
| 1533 | case S390_CC_OP_LOAD_AND_TEST: |
| 1534 | /* Like signed comparison with 0 */ |
| 1535 | return S390_CC_FOR_BINARY("cgr", cc_dep1, (Long)0); |
| 1536 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1537 | case S390_CC_OP_LOAD_POSITIVE_32: |
| 1538 | __asm__ volatile ( |
| 1539 | "lpr %[result],%[op]\n\t" |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 1540 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [result] "=d"(cc_dep1) |
| 1541 | : [op] "d"(cc_dep1) |
| 1542 | : "cc"); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1543 | return psw >> 28; /* cc */ |
| 1544 | |
| 1545 | case S390_CC_OP_LOAD_POSITIVE_64: |
| 1546 | __asm__ volatile ( |
| 1547 | "lpgr %[result],%[op]\n\t" |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 1548 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [result] "=d"(cc_dep1) |
| 1549 | : [op] "d"(cc_dep1) |
| 1550 | : "cc"); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1551 | return psw >> 28; /* cc */ |
| 1552 | |
| 1553 | case S390_CC_OP_TEST_UNDER_MASK_8: { |
| 1554 | UChar value = cc_dep1; |
| 1555 | UChar mask = cc_dep2; |
| 1556 | |
| 1557 | __asm__ volatile ( |
| 1558 | "bras %%r2,1f\n\t" /* %r2 = address of next insn */ |
| 1559 | "tm %[value],0\n\t" /* this is skipped, then EXecuted */ |
| 1560 | "1: ex %[mask],0(%%r2)\n\t" /* EXecute TM after modifying mask */ |
| 1561 | "ipm %[psw]\n\t" : [psw] "=d"(psw) |
| 1562 | : [value] "m"(value), [mask] "a"(mask) |
| 1563 | : "r2", "cc"); |
| 1564 | return psw >> 28; /* cc */ |
| 1565 | } |
| 1566 | |
| 1567 | case S390_CC_OP_TEST_UNDER_MASK_16: { |
| 1568 | /* Create a TMLL insn with the mask as given by cc_dep2 */ |
florian | 8cf6637 | 2015-02-09 23:21:07 +0000 | [diff] [blame] | 1569 | UInt insn = (0xA701u << 16) | cc_dep2; |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1570 | UInt value = cc_dep1; |
| 1571 | |
| 1572 | __asm__ volatile ( |
| 1573 | "lr 1,%[value]\n\t" |
| 1574 | "lhi 2,0x10\n\t" |
| 1575 | "ex 2,%[insn]\n\t" |
| 1576 | "ipm %[psw]\n\t" : [psw] "=d"(psw) |
| 1577 | : [value] "d"(value), [insn] "m"(insn) |
| 1578 | : "r1", "r2", "cc"); |
| 1579 | return psw >> 28; /* cc */ |
| 1580 | } |
| 1581 | |
| 1582 | case S390_CC_OP_SHIFT_LEFT_32: |
| 1583 | __asm__ volatile ( |
| 1584 | "sla %[op],0(%[amount])\n\t" |
| 1585 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [op] "+d"(cc_dep1) |
| 1586 | : [amount] "a"(cc_dep2) |
| 1587 | : "cc"); |
| 1588 | return psw >> 28; /* cc */ |
| 1589 | |
| 1590 | case S390_CC_OP_SHIFT_LEFT_64: { |
| 1591 | Int high = (Int)(cc_dep1 >> 32); |
| 1592 | Int low = (Int)(cc_dep1 & 0xFFFFFFFF); |
| 1593 | |
| 1594 | __asm__ volatile ( |
| 1595 | "lr 2,%[high]\n\t" |
| 1596 | "lr 3,%[low]\n\t" |
| 1597 | "slda 2,0(%[amount])\n\t" |
florian | ae88411 | 2012-07-27 20:55:01 +0000 | [diff] [blame] | 1598 | "ipm %[psw]\n\t" : [psw] "=d"(psw), [high] "+d"(high), |
| 1599 | [low] "+d"(low) |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1600 | : [amount] "a"(cc_dep2) |
| 1601 | : "cc", "r2", "r3"); |
| 1602 | return psw >> 28; /* cc */ |
| 1603 | } |
| 1604 | |
| 1605 | case S390_CC_OP_INSERT_CHAR_MASK_32: { |
| 1606 | Int inserted = 0; |
| 1607 | Int msb = 0; |
| 1608 | |
| 1609 | if (cc_dep2 & 1) { |
| 1610 | inserted |= cc_dep1 & 0xff; |
| 1611 | msb = 0x80; |
| 1612 | } |
| 1613 | if (cc_dep2 & 2) { |
| 1614 | inserted |= cc_dep1 & 0xff00; |
| 1615 | msb = 0x8000; |
| 1616 | } |
| 1617 | if (cc_dep2 & 4) { |
| 1618 | inserted |= cc_dep1 & 0xff0000; |
| 1619 | msb = 0x800000; |
| 1620 | } |
| 1621 | if (cc_dep2 & 8) { |
| 1622 | inserted |= cc_dep1 & 0xff000000; |
| 1623 | msb = 0x80000000; |
| 1624 | } |
| 1625 | |
| 1626 | if (inserted & msb) // MSB is 1 |
| 1627 | return 1; |
| 1628 | if (inserted > 0) |
| 1629 | return 2; |
| 1630 | return 0; |
| 1631 | } |
| 1632 | |
| 1633 | case S390_CC_OP_BFP_RESULT_32: |
| 1634 | return S390_CC_FOR_BFP_RESULT("ltebr", cc_dep1); |
| 1635 | |
| 1636 | case S390_CC_OP_BFP_RESULT_64: |
| 1637 | return S390_CC_FOR_BFP_RESULT("ltdbr", cc_dep1); |
| 1638 | |
| 1639 | case S390_CC_OP_BFP_RESULT_128: |
| 1640 | return S390_CC_FOR_BFP128_RESULT(cc_dep1, cc_dep2); |
| 1641 | |
| 1642 | case S390_CC_OP_BFP_32_TO_INT_32: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1643 | return S390_CC_FOR_BFP_CONVERT("cfebr", cc_dep1, cc_dep2); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1644 | |
| 1645 | case S390_CC_OP_BFP_64_TO_INT_32: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1646 | return S390_CC_FOR_BFP_CONVERT("cfdbr", cc_dep1, cc_dep2); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1647 | |
| 1648 | case S390_CC_OP_BFP_128_TO_INT_32: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1649 | return S390_CC_FOR_BFP128_CONVERT("cfxbr", cc_dep1, cc_dep2, cc_ndep); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1650 | |
| 1651 | case S390_CC_OP_BFP_32_TO_INT_64: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1652 | return S390_CC_FOR_BFP_CONVERT("cgebr", cc_dep1, cc_dep2); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1653 | |
| 1654 | case S390_CC_OP_BFP_64_TO_INT_64: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1655 | return S390_CC_FOR_BFP_CONVERT("cgdbr", cc_dep1, cc_dep2); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1656 | |
| 1657 | case S390_CC_OP_BFP_128_TO_INT_64: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1658 | return S390_CC_FOR_BFP128_CONVERT("cgxbr", cc_dep1, cc_dep2, cc_ndep); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1659 | |
| 1660 | case S390_CC_OP_BFP_TDC_32: |
| 1661 | return S390_CC_FOR_BFP_TDC("tceb", cc_dep1, cc_dep2); |
| 1662 | |
| 1663 | case S390_CC_OP_BFP_TDC_64: |
| 1664 | return S390_CC_FOR_BFP_TDC("tcdb", cc_dep1, cc_dep2); |
| 1665 | |
| 1666 | case S390_CC_OP_BFP_TDC_128: |
| 1667 | return S390_CC_FOR_BFP128_TDC(cc_dep1, cc_dep2, cc_ndep); |
| 1668 | |
| 1669 | case S390_CC_OP_SET: |
| 1670 | return cc_dep1; |
| 1671 | |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1672 | case S390_CC_OP_BFP_32_TO_UINT_32: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1673 | return S390_CC_FOR_BFP_UCONVERT(".insn rrf,0xb39c0000", cc_dep1, cc_dep2); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1674 | |
| 1675 | case S390_CC_OP_BFP_64_TO_UINT_32: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1676 | return S390_CC_FOR_BFP_UCONVERT(".insn rrf,0xb39d0000", cc_dep1, cc_dep2); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1677 | |
| 1678 | case S390_CC_OP_BFP_128_TO_UINT_32: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1679 | return S390_CC_FOR_BFP128_UCONVERT(".insn rrf,0xb39e0000", cc_dep1, |
| 1680 | cc_dep2, cc_ndep); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1681 | |
| 1682 | case S390_CC_OP_BFP_32_TO_UINT_64: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1683 | return S390_CC_FOR_BFP_UCONVERT(".insn rrf,0xb3ac0000", cc_dep1, cc_dep2); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1684 | |
| 1685 | case S390_CC_OP_BFP_64_TO_UINT_64: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1686 | return S390_CC_FOR_BFP_UCONVERT(".insn rrf,0xb3ad0000", cc_dep1, cc_dep2); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1687 | |
| 1688 | case S390_CC_OP_BFP_128_TO_UINT_64: |
florian | 19e0077 | 2012-09-06 03:13:22 +0000 | [diff] [blame] | 1689 | return S390_CC_FOR_BFP128_UCONVERT(".insn rrf,0xb3ae0000", cc_dep1, |
| 1690 | cc_dep2, cc_ndep); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1691 | |
florian | 1239020 | 2012-11-10 22:34:14 +0000 | [diff] [blame] | 1692 | case S390_CC_OP_DFP_RESULT_64: |
| 1693 | return S390_CC_FOR_DFP_RESULT(cc_dep1); |
florian | 1c8f7ff | 2012-09-01 00:12:11 +0000 | [diff] [blame] | 1694 | |
florian | e38f641 | 2012-12-21 17:32:12 +0000 | [diff] [blame] | 1695 | case S390_CC_OP_DFP_RESULT_128: |
| 1696 | return S390_CC_FOR_DFP128_RESULT(cc_dep1, cc_dep2); |
| 1697 | |
florian | ce9e3db | 2012-12-27 20:14:03 +0000 | [diff] [blame] | 1698 | case S390_CC_OP_DFP_TDC_32: /* TDCET */ |
| 1699 | return S390_CC_FOR_DFP_TD(".insn rxe, 0xed0000000050", cc_dep1, cc_dep2); |
| 1700 | |
| 1701 | case S390_CC_OP_DFP_TDC_64: /* TDCDT */ |
| 1702 | return S390_CC_FOR_DFP_TD(".insn rxe, 0xed0000000054", cc_dep1, cc_dep2); |
| 1703 | |
| 1704 | case S390_CC_OP_DFP_TDC_128: /* TDCXT */ |
| 1705 | return S390_CC_FOR_DFP128_TD(".insn rxe, 0xed0000000058", cc_dep1, |
| 1706 | cc_dep2, cc_ndep); |
| 1707 | |
| 1708 | case S390_CC_OP_DFP_TDG_32: /* TDGET */ |
| 1709 | return S390_CC_FOR_DFP_TD(".insn rxe, 0xed0000000051", cc_dep1, cc_dep2); |
| 1710 | |
| 1711 | case S390_CC_OP_DFP_TDG_64: /* TDGDT */ |
| 1712 | return S390_CC_FOR_DFP_TD(".insn rxe, 0xed0000000055", cc_dep1, cc_dep2); |
| 1713 | |
| 1714 | case S390_CC_OP_DFP_TDG_128: /* TDGXT */ |
| 1715 | return S390_CC_FOR_DFP128_TD(".insn rxe, 0xed0000000059", cc_dep1, |
| 1716 | cc_dep2, cc_ndep); |
| 1717 | |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1718 | case S390_CC_OP_DFP_64_TO_INT_32: /* CFDTR */ |
| 1719 | return S390_CC_FOR_DFP_CONVERT(".insn rrf,0xb9410000", cc_dep1, cc_dep2); |
| 1720 | |
| 1721 | case S390_CC_OP_DFP_128_TO_INT_32: /* CFXTR */ |
| 1722 | return S390_CC_FOR_DFP128_CONVERT(".insn rrf,0xb9490000", cc_dep1, |
| 1723 | cc_dep2, cc_ndep); |
| 1724 | |
florian | a887acd | 2013-02-08 23:32:54 +0000 | [diff] [blame] | 1725 | case S390_CC_OP_DFP_64_TO_INT_64: /* CGDTR */ |
| 1726 | return S390_CC_FOR_DFP_CONVERT(".insn rrf,0xb3e10000", cc_dep1, cc_dep2); |
| 1727 | |
| 1728 | case S390_CC_OP_DFP_128_TO_INT_64: /* CGXTR */ |
| 1729 | return S390_CC_FOR_DFP128_CONVERT(".insn rrf,0xb3e90000", cc_dep1, |
| 1730 | cc_dep2, cc_ndep); |
| 1731 | |
florian | 5f03462 | 2013-01-13 02:29:05 +0000 | [diff] [blame] | 1732 | case S390_CC_OP_DFP_64_TO_UINT_32: /* CLFDTR */ |
| 1733 | return S390_CC_FOR_DFP_UCONVERT(".insn rrf,0xb9430000", cc_dep1, cc_dep2); |
| 1734 | |
| 1735 | case S390_CC_OP_DFP_128_TO_UINT_32: /* CLFXTR */ |
| 1736 | return S390_CC_FOR_DFP128_UCONVERT(".insn rrf,0xb94b0000", cc_dep1, |
| 1737 | cc_dep2, cc_ndep); |
| 1738 | |
| 1739 | case S390_CC_OP_DFP_64_TO_UINT_64: /* CLGDTR */ |
| 1740 | return S390_CC_FOR_DFP_UCONVERT(".insn rrf,0xb9420000", cc_dep1, cc_dep2); |
| 1741 | |
| 1742 | case S390_CC_OP_DFP_128_TO_UINT_64: /* CLGXTR */ |
| 1743 | return S390_CC_FOR_DFP128_UCONVERT(".insn rrf,0xb94a0000", cc_dep1, |
| 1744 | cc_dep2, cc_ndep); |
| 1745 | |
florian | 7ab421d | 2013-06-17 21:03:56 +0000 | [diff] [blame] | 1746 | case S390_CC_OP_PFPO_32: { |
| 1747 | __asm__ volatile( |
| 1748 | "ler 4, %[cc_dep1]\n\t" /* 32 bit FR move */ |
| 1749 | "lr 0, %[cc_dep2]\n\t" /* 32 bit GR move */ |
| 1750 | ".short 0x010a\n\t" /* PFPO */ |
| 1751 | "ipm %[psw]\n\t" : [psw] "=d"(psw) |
| 1752 | : [cc_dep1] "f"(cc_dep1), |
| 1753 | [cc_dep2] "d"(cc_dep2) |
| 1754 | : "r0", "r1", "f4"); |
| 1755 | return psw >> 28; /* cc */ |
| 1756 | } |
| 1757 | |
florian | 78d5ef7 | 2013-05-11 15:02:58 +0000 | [diff] [blame] | 1758 | case S390_CC_OP_PFPO_64: { |
| 1759 | __asm__ volatile( |
| 1760 | "ldr 4, %[cc_dep1]\n\t" |
| 1761 | "lr 0, %[cc_dep2]\n\t" /* 32 bit register move */ |
| 1762 | ".short 0x010a\n\t" /* PFPO */ |
| 1763 | "ipm %[psw]\n\t" : [psw] "=d"(psw) |
florian | c589228 | 2013-05-12 13:57:13 +0000 | [diff] [blame] | 1764 | : [cc_dep1] "f"(cc_dep1), |
| 1765 | [cc_dep2] "d"(cc_dep2) |
florian | 78d5ef7 | 2013-05-11 15:02:58 +0000 | [diff] [blame] | 1766 | : "r0", "r1", "f4"); |
| 1767 | return psw >> 28; /* cc */ |
| 1768 | } |
| 1769 | |
| 1770 | case S390_CC_OP_PFPO_128: { |
| 1771 | __asm__ volatile( |
| 1772 | "ldr 4,%[cc_dep1]\n\t" |
| 1773 | "ldr 6,%[cc_dep2]\n\t" |
| 1774 | "lr 0,%[cc_ndep]\n\t" /* 32 bit register move */ |
| 1775 | ".short 0x010a\n\t" /* PFPO */ |
| 1776 | "ipm %[psw]\n\t" : [psw] "=d"(psw) |
| 1777 | : [cc_dep1] "f"(cc_dep1), |
| 1778 | [cc_dep2] "f"(cc_dep2), |
| 1779 | [cc_ndep] "d"(cc_ndep) |
| 1780 | : "r0", "r1", "f0", "f2", "f4", "f6"); |
| 1781 | return psw >> 28; /* cc */ |
| 1782 | } |
| 1783 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1784 | default: |
| 1785 | break; |
| 1786 | } |
| 1787 | #endif |
| 1788 | vpanic("s390_calculate_cc"); |
| 1789 | } |
| 1790 | |
| 1791 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1792 | /* Note that this does *not* return a Boolean value. The result needs to be |
| 1793 | explicitly tested against zero. */ |
| 1794 | UInt |
| 1795 | s390_calculate_cond(ULong mask, ULong op, ULong dep1, ULong dep2, ULong ndep) |
| 1796 | { |
| 1797 | UInt cc = s390_calculate_cc(op, dep1, dep2, ndep); |
| 1798 | |
| 1799 | return ((mask << cc) & 0x8); |
| 1800 | } |
| 1801 | |
| 1802 | /*------------------------------------------------------------*/ |
| 1803 | /*--- spechelper for performance ---*/ |
| 1804 | /*------------------------------------------------------------*/ |
| 1805 | |
| 1806 | |
| 1807 | /* Convenience macros */ |
| 1808 | #define unop(op,a1) IRExpr_Unop((op),(a1)) |
| 1809 | #define binop(op,a1,a2) IRExpr_Binop((op),(a1),(a2)) |
| 1810 | #define mkU64(v) IRExpr_Const(IRConst_U64(v)) |
| 1811 | #define mkU32(v) IRExpr_Const(IRConst_U32(v)) |
| 1812 | #define mkU8(v) IRExpr_Const(IRConst_U8(v)) |
| 1813 | |
| 1814 | |
| 1815 | static inline Bool |
florian | 49adf86 | 2014-12-06 20:24:08 +0000 | [diff] [blame] | 1816 | isC64(const IRExpr *expr) |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1817 | { |
| 1818 | return expr->tag == Iex_Const && expr->Iex.Const.con->tag == Ico_U64; |
| 1819 | } |
| 1820 | |
| 1821 | |
| 1822 | /* The returned expression is NULL if no specialization was found. In that |
| 1823 | case the helper function will be called. Otherwise, the expression has |
| 1824 | type Ity_I32 and a Boolean value. */ |
| 1825 | IRExpr * |
florian | 1ff4756 | 2012-10-21 02:09:51 +0000 | [diff] [blame] | 1826 | guest_s390x_spechelper(const HChar *function_name, IRExpr **args, |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1827 | IRStmt **precedingStmts, Int n_precedingStmts) |
| 1828 | { |
| 1829 | UInt i, arity = 0; |
| 1830 | |
| 1831 | for (i = 0; args[i]; i++) |
| 1832 | arity++; |
| 1833 | |
| 1834 | # if 0 |
| 1835 | vex_printf("spec request:\n"); |
| 1836 | vex_printf(" %s ", function_name); |
| 1837 | for (i = 0; i < arity; i++) { |
| 1838 | vex_printf(" "); |
| 1839 | ppIRExpr(args[i]); |
| 1840 | } |
| 1841 | vex_printf("\n"); |
| 1842 | # endif |
| 1843 | |
| 1844 | /* --------- Specialising "s390_calculate_cond" --------- */ |
| 1845 | |
| 1846 | if (vex_streq(function_name, "s390_calculate_cond")) { |
| 1847 | IRExpr *cond_expr, *cc_op_expr, *cc_dep1, *cc_dep2; |
| 1848 | ULong cond, cc_op; |
| 1849 | |
| 1850 | vassert(arity == 5); |
| 1851 | |
| 1852 | cond_expr = args[0]; |
| 1853 | cc_op_expr = args[1]; |
| 1854 | |
| 1855 | /* The necessary requirement for all optimizations here is that the |
| 1856 | condition and the cc_op are constant. So check that upfront. */ |
| 1857 | if (! isC64(cond_expr)) return NULL; |
| 1858 | if (! isC64(cc_op_expr)) return NULL; |
| 1859 | |
| 1860 | cond = cond_expr->Iex.Const.con->Ico.U64; |
| 1861 | cc_op = cc_op_expr->Iex.Const.con->Ico.U64; |
| 1862 | |
| 1863 | vassert(cond <= 15); |
| 1864 | |
| 1865 | /* |
| 1866 | +------+---+---+---+---+ |
| 1867 | | cc | 0 | 1 | 2 | 3 | |
| 1868 | | cond | 8 | 4 | 2 | 1 | |
| 1869 | +------+---+---+---+---+ |
| 1870 | */ |
| 1871 | cc_dep1 = args[2]; |
| 1872 | cc_dep2 = args[3]; |
| 1873 | |
| 1874 | /* S390_CC_OP_SIGNED_COMPARE */ |
| 1875 | if (cc_op == S390_CC_OP_SIGNED_COMPARE) { |
| 1876 | /* |
| 1877 | cc == 0 --> cc_dep1 == cc_dep2 (cond == 8) |
| 1878 | cc == 1 --> cc_dep1 < cc_dep2 (cond == 4) |
| 1879 | cc == 2 --> cc_dep1 > cc_dep2 (cond == 2) |
| 1880 | |
| 1881 | Because cc == 3 cannot occur the rightmost bit of cond is |
| 1882 | a don't care. |
| 1883 | */ |
| 1884 | if (cond == 8 || cond == 8 + 1) { |
| 1885 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, cc_dep1, cc_dep2)); |
| 1886 | } |
| 1887 | if (cond == 4 + 2 || cond == 4 + 2 + 1) { |
| 1888 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, cc_dep1, cc_dep2)); |
| 1889 | } |
| 1890 | if (cond == 4 || cond == 4 + 1) { |
| 1891 | return unop(Iop_1Uto32, binop(Iop_CmpLT64S, cc_dep1, cc_dep2)); |
| 1892 | } |
| 1893 | if (cond == 8 + 4 || cond == 8 + 4 + 1) { |
| 1894 | return unop(Iop_1Uto32, binop(Iop_CmpLE64S, cc_dep1, cc_dep2)); |
| 1895 | } |
| 1896 | /* cc_dep1 > cc_dep2 ----> cc_dep2 < cc_dep1 */ |
| 1897 | if (cond == 2 || cond == 2 + 1) { |
| 1898 | return unop(Iop_1Uto32, binop(Iop_CmpLT64S, cc_dep2, cc_dep1)); |
| 1899 | } |
| 1900 | if (cond == 8 + 2 || cond == 8 + 2 + 1) { |
| 1901 | return unop(Iop_1Uto32, binop(Iop_CmpLE64S, cc_dep2, cc_dep1)); |
| 1902 | } |
| 1903 | if (cond == 8 + 4 + 2 || cond == 8 + 4 + 2 + 1) { |
| 1904 | return mkU32(1); |
| 1905 | } |
| 1906 | /* Remaining case */ |
| 1907 | return mkU32(0); |
| 1908 | } |
| 1909 | |
| 1910 | /* S390_CC_OP_UNSIGNED_COMPARE */ |
| 1911 | if (cc_op == S390_CC_OP_UNSIGNED_COMPARE) { |
| 1912 | /* |
| 1913 | cc == 0 --> cc_dep1 == cc_dep2 (cond == 8) |
| 1914 | cc == 1 --> cc_dep1 < cc_dep2 (cond == 4) |
| 1915 | cc == 2 --> cc_dep1 > cc_dep2 (cond == 2) |
| 1916 | |
| 1917 | Because cc == 3 cannot occur the rightmost bit of cond is |
| 1918 | a don't care. |
| 1919 | */ |
| 1920 | if (cond == 8 || cond == 8 + 1) { |
| 1921 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, cc_dep1, cc_dep2)); |
| 1922 | } |
| 1923 | if (cond == 4 + 2 || cond == 4 + 2 + 1) { |
| 1924 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, cc_dep1, cc_dep2)); |
| 1925 | } |
| 1926 | if (cond == 4 || cond == 4 + 1) { |
| 1927 | return unop(Iop_1Uto32, binop(Iop_CmpLT64U, cc_dep1, cc_dep2)); |
| 1928 | } |
| 1929 | if (cond == 8 + 4 || cond == 8 + 4 + 1) { |
| 1930 | return unop(Iop_1Uto32, binop(Iop_CmpLE64U, cc_dep1, cc_dep2)); |
| 1931 | } |
| 1932 | /* cc_dep1 > cc_dep2 ----> cc_dep2 < cc_dep1 */ |
| 1933 | if (cond == 2 || cond == 2 + 1) { |
| 1934 | return unop(Iop_1Uto32, binop(Iop_CmpLT64U, cc_dep2, cc_dep1)); |
| 1935 | } |
| 1936 | if (cond == 8 + 2 || cond == 8 + 2 + 1) { |
| 1937 | return unop(Iop_1Uto32, binop(Iop_CmpLE64U, cc_dep2, cc_dep1)); |
| 1938 | } |
| 1939 | if (cond == 8 + 4 + 2 || cond == 8 + 4 + 2 + 1) { |
| 1940 | return mkU32(1); |
| 1941 | } |
| 1942 | /* Remaining case */ |
| 1943 | return mkU32(0); |
| 1944 | } |
| 1945 | |
| 1946 | /* S390_CC_OP_LOAD_AND_TEST */ |
| 1947 | if (cc_op == S390_CC_OP_LOAD_AND_TEST) { |
| 1948 | /* |
| 1949 | cc == 0 --> cc_dep1 == 0 (cond == 8) |
| 1950 | cc == 1 --> cc_dep1 < 0 (cond == 4) |
| 1951 | cc == 2 --> cc_dep1 > 0 (cond == 2) |
| 1952 | |
| 1953 | Because cc == 3 cannot occur the rightmost bit of cond is |
| 1954 | a don't care. |
| 1955 | */ |
| 1956 | if (cond == 8 || cond == 8 + 1) { |
| 1957 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, cc_dep1, mkU64(0))); |
| 1958 | } |
| 1959 | if (cond == 4 + 2 || cond == 4 + 2 + 1) { |
| 1960 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, cc_dep1, mkU64(0))); |
| 1961 | } |
| 1962 | if (cond == 4 || cond == 4 + 1) { |
cborntra | 18bf154 | 2015-02-05 11:05:10 +0000 | [diff] [blame] | 1963 | /* Special case cc_dep < 0. Only check the MSB to avoid bogus |
| 1964 | memcheck complaints due to gcc magic. Fixes 343802 |
| 1965 | */ |
| 1966 | return unop(Iop_64to32, binop(Iop_Shr64, cc_dep1, mkU8(63))); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1967 | } |
| 1968 | if (cond == 8 + 4 || cond == 8 + 4 + 1) { |
| 1969 | return unop(Iop_1Uto32, binop(Iop_CmpLE64S, cc_dep1, mkU64(0))); |
| 1970 | } |
| 1971 | /* cc_dep1 > 0 ----> 0 < cc_dep1 */ |
| 1972 | if (cond == 2 || cond == 2 + 1) { |
| 1973 | return unop(Iop_1Uto32, binop(Iop_CmpLT64S, mkU64(0), cc_dep1)); |
| 1974 | } |
| 1975 | if (cond == 8 + 2 || cond == 8 + 2 + 1) { |
florian | 25e1cb2 | 2012-11-25 01:22:27 +0000 | [diff] [blame] | 1976 | /* Special case cc_dep >= 0. Only check the MSB to avoid bogus |
| 1977 | memcheck complaints due to gcc magic. Fixes 308427 |
cborntra | d7f19c0 | 2012-10-15 14:03:20 +0000 | [diff] [blame] | 1978 | */ |
florian | 25e1cb2 | 2012-11-25 01:22:27 +0000 | [diff] [blame] | 1979 | return unop(Iop_64to32, binop(Iop_Xor64, |
| 1980 | binop(Iop_Shr64, cc_dep1, mkU8(63)), |
| 1981 | mkU64(1))); |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 1982 | } |
| 1983 | if (cond == 8 + 4 + 2 || cond == 8 + 4 + 2 + 1) { |
| 1984 | return mkU32(1); |
| 1985 | } |
| 1986 | /* Remaining case */ |
| 1987 | return mkU32(0); |
| 1988 | } |
| 1989 | |
| 1990 | /* S390_CC_OP_BITWISE */ |
| 1991 | if (cc_op == S390_CC_OP_BITWISE) { |
| 1992 | /* |
| 1993 | cc_dep1 is the result of the boolean operation. |
| 1994 | |
| 1995 | cc == 0 --> cc_dep1 == 0 (cond == 8) |
| 1996 | cc == 1 --> cc_dep1 != 0 (cond == 4) |
| 1997 | |
| 1998 | Because cc == 2 and cc == 3 cannot occur the two rightmost bits of |
| 1999 | cond are don't cares. Therefore: |
| 2000 | |
| 2001 | cond == 00xx -> always false |
| 2002 | cond == 01xx -> not equal |
| 2003 | cond == 10xx -> equal |
| 2004 | cond == 11xx -> always true |
| 2005 | */ |
| 2006 | if ((cond & (8 + 4)) == 8 + 4) { |
| 2007 | return mkU32(1); |
| 2008 | } |
| 2009 | if (cond & 8) { |
| 2010 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, cc_dep1, mkU64(0))); |
| 2011 | } |
| 2012 | if (cond & 4) { |
| 2013 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, cc_dep1, mkU64(0))); |
| 2014 | } |
| 2015 | /* Remaining case */ |
| 2016 | return mkU32(0); |
| 2017 | } |
| 2018 | |
| 2019 | /* S390_CC_OP_INSERT_CHAR_MASK_32 |
| 2020 | Since the mask comes from an immediate field in the opcode, we |
| 2021 | expect the mask to be a constant here. That simplifies matters. */ |
| 2022 | if (cc_op == S390_CC_OP_INSERT_CHAR_MASK_32) { |
| 2023 | ULong mask; |
| 2024 | UInt imask = 0, shift = 0; |
| 2025 | IRExpr *word; |
| 2026 | |
| 2027 | if (! isC64(cc_dep2)) goto missed; |
| 2028 | |
| 2029 | mask = cc_dep2->Iex.Const.con->Ico.U64; |
| 2030 | |
| 2031 | /* Extract the 32-bit value from the thunk */ |
| 2032 | |
| 2033 | word = unop(Iop_64to32, cc_dep1); |
| 2034 | |
| 2035 | switch (mask) { |
| 2036 | case 0: shift = 0; imask = 0x00000000; break; |
| 2037 | case 1: shift = 24; imask = 0x000000FF; break; |
| 2038 | case 2: shift = 16; imask = 0x0000FF00; break; |
| 2039 | case 3: shift = 16; imask = 0x0000FFFF; break; |
| 2040 | case 4: shift = 8; imask = 0x00FF0000; break; |
| 2041 | case 5: shift = 8; imask = 0x00FF00FF; break; |
| 2042 | case 6: shift = 8; imask = 0x00FFFF00; break; |
| 2043 | case 7: shift = 8; imask = 0x00FFFFFF; break; |
| 2044 | case 8: shift = 0; imask = 0xFF000000; break; |
| 2045 | case 9: shift = 0; imask = 0xFF0000FF; break; |
| 2046 | case 10: shift = 0; imask = 0xFF00FF00; break; |
| 2047 | case 11: shift = 0; imask = 0xFF00FFFF; break; |
| 2048 | case 12: shift = 0; imask = 0xFFFF0000; break; |
| 2049 | case 13: shift = 0; imask = 0xFFFF00FF; break; |
| 2050 | case 14: shift = 0; imask = 0xFFFFFF00; break; |
| 2051 | case 15: shift = 0; imask = 0xFFFFFFFF; break; |
| 2052 | } |
| 2053 | |
| 2054 | /* Select the bits that were inserted */ |
| 2055 | word = binop(Iop_And32, word, mkU32(imask)); |
| 2056 | |
| 2057 | /* cc == 0 --> all inserted bits zero or mask == 0 (cond == 8) |
| 2058 | cc == 1 --> leftmost inserted bit is one (cond == 4) |
| 2059 | cc == 2 --> leftmost inserted bit is zero and not (cond == 2) |
| 2060 | all inserted bits are zero |
| 2061 | |
| 2062 | Because cc == 0,1,2 the rightmost bit of the mask is a don't care */ |
| 2063 | if (cond == 8 || cond == 8 + 1) { |
| 2064 | return unop(Iop_1Uto32, binop(Iop_CmpEQ32, word, mkU32(0))); |
| 2065 | } |
| 2066 | if (cond == 4 + 2 || cond == 4 + 2 + 1) { |
| 2067 | return unop(Iop_1Uto32, binop(Iop_CmpNE32, word, mkU32(0))); |
| 2068 | } |
| 2069 | |
| 2070 | /* Sign extend */ |
| 2071 | if (shift != 0) { |
| 2072 | word = binop(Iop_Sar32, binop(Iop_Shl32, word, mkU8(shift)), |
| 2073 | mkU8(shift)); |
| 2074 | } |
| 2075 | |
| 2076 | if (cond == 4 || cond == 4 + 1) { /* word < 0 */ |
| 2077 | return unop(Iop_1Uto32, binop(Iop_CmpLT32S, word, mkU32(0))); |
| 2078 | } |
| 2079 | if (cond == 2 || cond == 2 + 1) { /* word > 0 */ |
| 2080 | return unop(Iop_1Uto32, binop(Iop_CmpLT32S, mkU32(0), word)); |
| 2081 | } |
| 2082 | if (cond == 8 + 4 || cond == 8 + 4 + 1) { |
| 2083 | return unop(Iop_1Uto32, binop(Iop_CmpLE32S, word, mkU32(0))); |
| 2084 | } |
| 2085 | if (cond == 8 + 2 || cond == 8 + 2 + 1) { |
| 2086 | return unop(Iop_1Uto32, binop(Iop_CmpLE32S, mkU32(0), word)); |
| 2087 | } |
| 2088 | if (cond == 8 + 4 + 2 || cond == 8 + 4 + 2 + 1) { |
| 2089 | return mkU32(1); |
| 2090 | } |
| 2091 | /* Remaining case */ |
| 2092 | return mkU32(0); |
| 2093 | } |
| 2094 | |
| 2095 | /* S390_CC_OP_TEST_UNDER_MASK_8 |
| 2096 | Since the mask comes from an immediate field in the opcode, we |
| 2097 | expect the mask to be a constant here. That simplifies matters. */ |
| 2098 | if (cc_op == S390_CC_OP_TEST_UNDER_MASK_8) { |
| 2099 | ULong mask16; |
| 2100 | |
| 2101 | if (! isC64(cc_dep2)) goto missed; |
| 2102 | |
| 2103 | mask16 = cc_dep2->Iex.Const.con->Ico.U64; |
| 2104 | |
| 2105 | /* Get rid of the mask16 == 0 case first. Some of the simplifications |
| 2106 | below (e.g. for OVFL) only hold if mask16 == 0. */ |
| 2107 | if (mask16 == 0) { /* cc == 0 */ |
| 2108 | if (cond & 0x8) return mkU32(1); |
| 2109 | return mkU32(0); |
| 2110 | } |
| 2111 | |
| 2112 | /* cc == 2 is a don't care */ |
| 2113 | if (cond == 8 || cond == 8 + 2) { |
| 2114 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2115 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2116 | mkU64(0))); |
| 2117 | } |
| 2118 | if (cond == 7 || cond == 7 - 2) { |
| 2119 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2120 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2121 | mkU64(0))); |
| 2122 | } |
| 2123 | if (cond == 1 || cond == 1 + 2) { |
| 2124 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2125 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2126 | cc_dep2)); |
| 2127 | } |
| 2128 | if (cond == 14 || cond == 14 - 2) { /* ! OVFL */ |
| 2129 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2130 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2131 | cc_dep2)); |
| 2132 | } |
| 2133 | goto missed; |
| 2134 | } |
| 2135 | |
| 2136 | /* S390_CC_OP_TEST_UNDER_MASK_16 |
| 2137 | Since the mask comes from an immediate field in the opcode, we |
| 2138 | expect the mask to be a constant here. That simplifies matters. */ |
| 2139 | if (cc_op == S390_CC_OP_TEST_UNDER_MASK_16) { |
| 2140 | ULong mask16; |
| 2141 | UInt msb; |
| 2142 | |
| 2143 | if (! isC64(cc_dep2)) goto missed; |
| 2144 | |
| 2145 | mask16 = cc_dep2->Iex.Const.con->Ico.U64; |
| 2146 | |
| 2147 | /* Get rid of the mask16 == 0 case first. Some of the simplifications |
| 2148 | below (e.g. for OVFL) only hold if mask16 == 0. */ |
| 2149 | if (mask16 == 0) { /* cc == 0 */ |
| 2150 | if (cond & 0x8) return mkU32(1); |
| 2151 | return mkU32(0); |
| 2152 | } |
| 2153 | |
florian | 9ec12ea | 2015-09-08 06:25:02 +0000 | [diff] [blame] | 2154 | if (cond == 15) return mkU32(1); |
| 2155 | |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 2156 | if (cond == 8) { |
| 2157 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2158 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2159 | mkU64(0))); |
| 2160 | } |
| 2161 | if (cond == 7) { |
| 2162 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2163 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2164 | mkU64(0))); |
| 2165 | } |
| 2166 | if (cond == 1) { |
| 2167 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2168 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2169 | mkU64(mask16))); |
| 2170 | } |
| 2171 | if (cond == 14) { /* ! OVFL */ |
| 2172 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2173 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2174 | mkU64(mask16))); |
| 2175 | } |
| 2176 | |
| 2177 | /* Find MSB in mask */ |
| 2178 | msb = 0x8000; |
| 2179 | while (msb > mask16) |
| 2180 | msb >>= 1; |
| 2181 | |
| 2182 | if (cond == 2) { /* cc == 2 */ |
| 2183 | IRExpr *c1, *c2; |
| 2184 | |
| 2185 | /* (cc_dep & msb) != 0 && (cc_dep & mask16) != mask16 */ |
| 2186 | c1 = binop(Iop_CmpNE64, |
| 2187 | binop(Iop_And64, cc_dep1, mkU64(msb)), mkU64(0)); |
| 2188 | c2 = binop(Iop_CmpNE64, |
| 2189 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2190 | mkU64(mask16)); |
| 2191 | return binop(Iop_And32, unop(Iop_1Uto32, c1), |
| 2192 | unop(Iop_1Uto32, c2)); |
| 2193 | } |
| 2194 | |
| 2195 | if (cond == 4) { /* cc == 1 */ |
| 2196 | IRExpr *c1, *c2; |
| 2197 | |
| 2198 | /* (cc_dep & msb) == 0 && (cc_dep & mask16) != 0 */ |
| 2199 | c1 = binop(Iop_CmpEQ64, |
| 2200 | binop(Iop_And64, cc_dep1, mkU64(msb)), mkU64(0)); |
| 2201 | c2 = binop(Iop_CmpNE64, |
| 2202 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2203 | mkU64(0)); |
| 2204 | return binop(Iop_And32, unop(Iop_1Uto32, c1), |
| 2205 | unop(Iop_1Uto32, c2)); |
| 2206 | } |
| 2207 | |
| 2208 | if (cond == 11) { /* cc == 0,2,3 */ |
| 2209 | IRExpr *c1, *c2; |
| 2210 | |
| 2211 | c1 = binop(Iop_CmpNE64, |
| 2212 | binop(Iop_And64, cc_dep1, mkU64(msb)), mkU64(0)); |
| 2213 | c2 = binop(Iop_CmpEQ64, |
| 2214 | binop(Iop_And64, cc_dep1, cc_dep2), |
| 2215 | mkU64(0)); |
| 2216 | return binop(Iop_Or32, unop(Iop_1Uto32, c1), |
| 2217 | unop(Iop_1Uto32, c2)); |
| 2218 | } |
| 2219 | |
| 2220 | if (cond == 3) { /* cc == 2 || cc == 3 */ |
| 2221 | return unop(Iop_1Uto32, |
| 2222 | binop(Iop_CmpNE64, |
| 2223 | binop(Iop_And64, cc_dep1, mkU64(msb)), |
| 2224 | mkU64(0))); |
| 2225 | } |
| 2226 | if (cond == 12) { /* cc == 0 || cc == 1 */ |
| 2227 | return unop(Iop_1Uto32, |
| 2228 | binop(Iop_CmpEQ64, |
| 2229 | binop(Iop_And64, cc_dep1, mkU64(msb)), |
| 2230 | mkU64(0))); |
| 2231 | } |
florian | 9ec12ea | 2015-09-08 06:25:02 +0000 | [diff] [blame] | 2232 | if (cond == 13) { /* cc == 0 || cc == 1 || cc == 3 */ |
| 2233 | IRExpr *c01, *c3; |
| 2234 | |
| 2235 | c01 = binop(Iop_CmpEQ64, binop(Iop_And64, cc_dep1, mkU64(msb)), |
| 2236 | mkU64(0)); |
| 2237 | c3 = binop(Iop_CmpEQ64, binop(Iop_And64, cc_dep1, cc_dep2), |
| 2238 | mkU64(mask16)); |
| 2239 | return binop(Iop_Or32, unop(Iop_1Uto32, c01), |
| 2240 | unop(Iop_1Uto32, c3)); |
| 2241 | } |
| 2242 | // fixs390: handle cond = 5,6,9,10 (the missing cases) |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 2243 | // vex_printf("TUM mask = 0x%llx\n", mask16); |
| 2244 | goto missed; |
| 2245 | } |
| 2246 | |
| 2247 | /* S390_CC_OP_UNSIGNED_SUB_64/32 */ |
| 2248 | if (cc_op == S390_CC_OP_UNSIGNED_SUB_64 || |
| 2249 | cc_op == S390_CC_OP_UNSIGNED_SUB_32) { |
| 2250 | /* |
| 2251 | cc_dep1, cc_dep2 are the zero extended left and right operands |
| 2252 | |
| 2253 | cc == 1 --> result != 0, borrow (cond == 4) |
| 2254 | cc == 2 --> result == 0, no borrow (cond == 2) |
| 2255 | cc == 3 --> result != 0, no borrow (cond == 1) |
| 2256 | |
| 2257 | cc = (cc_dep1 == cc_dep2) ? 2 |
| 2258 | : (cc_dep1 > cc_dep2) ? 3 : 1; |
| 2259 | |
| 2260 | Because cc == 0 cannot occur the leftmost bit of cond is |
| 2261 | a don't care. |
| 2262 | */ |
| 2263 | if (cond == 1 || cond == 1 + 8) { /* cc == 3 op2 < op1 */ |
| 2264 | return unop(Iop_1Uto32, binop(Iop_CmpLT64U, cc_dep2, cc_dep1)); |
| 2265 | } |
| 2266 | if (cond == 2 || cond == 2 + 8) { /* cc == 2 */ |
| 2267 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, cc_dep1, cc_dep2)); |
| 2268 | } |
| 2269 | if (cond == 4 || cond == 4 + 8) { /* cc == 1 */ |
| 2270 | return unop(Iop_1Uto32, binop(Iop_CmpLT64U, cc_dep1, cc_dep2)); |
| 2271 | } |
| 2272 | if (cond == 3 || cond == 3 + 8) { /* cc == 2 || cc == 3 */ |
| 2273 | return unop(Iop_1Uto32, binop(Iop_CmpLE64U, cc_dep2, cc_dep1)); |
| 2274 | } |
| 2275 | if (cond == 6 || cond == 6 + 8) { /* cc == 2 || cc == 1 */ |
| 2276 | return unop(Iop_1Uto32, binop(Iop_CmpLE64U, cc_dep1, cc_dep2)); |
| 2277 | } |
| 2278 | |
| 2279 | if (cond == 5 || cond == 5 + 8) { /* cc == 3 || cc == 1 */ |
| 2280 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, cc_dep1, cc_dep2)); |
| 2281 | } |
| 2282 | if (cond == 7 || cond == 7 + 8) { |
| 2283 | return mkU32(1); |
| 2284 | } |
| 2285 | /* Remaining case */ |
| 2286 | return mkU32(0); |
| 2287 | } |
| 2288 | |
| 2289 | /* S390_CC_OP_UNSIGNED_ADD_64 */ |
| 2290 | if (cc_op == S390_CC_OP_UNSIGNED_ADD_64) { |
| 2291 | /* |
| 2292 | cc_dep1, cc_dep2 are the zero extended left and right operands |
| 2293 | |
| 2294 | cc == 0 --> result == 0, no carry (cond == 8) |
| 2295 | cc == 1 --> result != 0, no carry (cond == 4) |
| 2296 | cc == 2 --> result == 0, carry (cond == 2) |
| 2297 | cc == 3 --> result != 0, carry (cond == 1) |
| 2298 | */ |
| 2299 | if (cond == 8) { /* cc == 0 */ |
| 2300 | /* Both inputs are 0 */ |
| 2301 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2302 | binop(Iop_Or64, cc_dep1, cc_dep2), |
| 2303 | mkU64(0))); |
| 2304 | } |
| 2305 | if (cond == 7) { /* cc == 1,2,3 */ |
| 2306 | /* Not both inputs are 0 */ |
| 2307 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2308 | binop(Iop_Or64, cc_dep1, cc_dep2), |
| 2309 | mkU64(0))); |
| 2310 | } |
| 2311 | if (cond == 8 + 2) { /* cc == 0,2 -> result is zero */ |
| 2312 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2313 | binop(Iop_Add64, cc_dep1, cc_dep2), |
| 2314 | mkU64(0))); |
| 2315 | } |
| 2316 | if (cond == 4 + 1) { /* cc == 1,3 -> result is not zero */ |
| 2317 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2318 | binop(Iop_Add64, cc_dep1, cc_dep2), |
| 2319 | mkU64(0))); |
| 2320 | } |
| 2321 | goto missed; |
| 2322 | } |
| 2323 | |
| 2324 | /* S390_CC_OP_UNSIGNED_ADD_32 */ |
| 2325 | if (cc_op == S390_CC_OP_UNSIGNED_ADD_32) { |
| 2326 | /* |
| 2327 | cc_dep1, cc_dep2 are the zero extended left and right operands |
| 2328 | |
| 2329 | cc == 0 --> result == 0, no carry (cond == 8) |
| 2330 | cc == 1 --> result != 0, no carry (cond == 4) |
| 2331 | cc == 2 --> result == 0, carry (cond == 2) |
| 2332 | cc == 3 --> result != 0, carry (cond == 1) |
| 2333 | */ |
| 2334 | if (cond == 8) { /* cc == 0 */ |
| 2335 | /* Both inputs are 0 */ |
| 2336 | return unop(Iop_1Uto32, binop(Iop_CmpEQ64, |
| 2337 | binop(Iop_Or64, cc_dep1, cc_dep2), |
| 2338 | mkU64(0))); |
| 2339 | } |
| 2340 | if (cond == 7) { /* cc == 1,2,3 */ |
| 2341 | /* Not both inputs are 0 */ |
| 2342 | return unop(Iop_1Uto32, binop(Iop_CmpNE64, |
| 2343 | binop(Iop_Or64, cc_dep1, cc_dep2), |
| 2344 | mkU64(0))); |
| 2345 | } |
| 2346 | if (cond == 8 + 2) { /* cc == 0,2 -> result is zero */ |
| 2347 | return unop(Iop_1Uto32, binop(Iop_CmpEQ32, |
| 2348 | binop(Iop_Add32, |
| 2349 | unop(Iop_64to32, cc_dep1), |
| 2350 | unop(Iop_64to32, cc_dep2)), |
| 2351 | mkU32(0))); |
| 2352 | } |
| 2353 | if (cond == 4 + 1) { /* cc == 1,3 -> result is not zero */ |
| 2354 | return unop(Iop_1Uto32, binop(Iop_CmpNE32, |
| 2355 | binop(Iop_Add32, |
| 2356 | unop(Iop_64to32, cc_dep1), |
| 2357 | unop(Iop_64to32, cc_dep2)), |
| 2358 | mkU32(0))); |
| 2359 | } |
| 2360 | goto missed; |
| 2361 | } |
| 2362 | |
| 2363 | /* S390_CC_OP_SET */ |
| 2364 | if (cc_op == S390_CC_OP_SET) { |
| 2365 | /* cc_dep1 is the condition code |
| 2366 | |
| 2367 | Return 1, if ((cond << cc_dep1) & 0x8) != 0 */ |
| 2368 | |
| 2369 | return unop(Iop_1Uto32, |
| 2370 | binop(Iop_CmpNE64, |
| 2371 | binop(Iop_And64, |
| 2372 | binop(Iop_Shl64, cond_expr, |
| 2373 | unop(Iop_64to8, cc_dep1)), |
| 2374 | mkU64(8)), |
| 2375 | mkU64(0))); |
| 2376 | } |
| 2377 | |
florian | af514c0 | 2013-09-13 21:42:14 +0000 | [diff] [blame] | 2378 | goto missed; |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 2379 | } |
| 2380 | |
florian | 9ec12ea | 2015-09-08 06:25:02 +0000 | [diff] [blame] | 2381 | /* --------- Specialising "s390_calculate_cc" --------- */ |
florian | af514c0 | 2013-09-13 21:42:14 +0000 | [diff] [blame] | 2382 | |
| 2383 | if (vex_streq(function_name, "s390_calculate_cc")) { |
| 2384 | IRExpr *cc_op_expr, *cc_dep1; |
| 2385 | ULong cc_op; |
| 2386 | |
| 2387 | vassert(arity == 4); |
| 2388 | |
| 2389 | cc_op_expr = args[0]; |
| 2390 | |
| 2391 | /* The necessary requirement for all optimizations here is that |
| 2392 | cc_op is constant. So check that upfront. */ |
| 2393 | if (! isC64(cc_op_expr)) return NULL; |
| 2394 | |
| 2395 | cc_op = cc_op_expr->Iex.Const.con->Ico.U64; |
| 2396 | cc_dep1 = args[1]; |
| 2397 | |
| 2398 | if (cc_op == S390_CC_OP_BITWISE) { |
| 2399 | return unop(Iop_1Uto32, |
| 2400 | binop(Iop_CmpNE64, cc_dep1, mkU64(0))); |
| 2401 | } |
| 2402 | |
| 2403 | if (cc_op == S390_CC_OP_SET) { |
| 2404 | return unop(Iop_64to32, cc_dep1); |
| 2405 | } |
| 2406 | |
| 2407 | goto missed; |
| 2408 | } |
| 2409 | |
| 2410 | missed: |
sewardj | 2019a97 | 2011-03-07 16:04:07 +0000 | [diff] [blame] | 2411 | return NULL; |
| 2412 | } |
| 2413 | |
| 2414 | /*---------------------------------------------------------------*/ |
| 2415 | /*--- end guest_s390_helpers.c ---*/ |
| 2416 | /*---------------------------------------------------------------*/ |