gnu/dist/gcc4/gcc/config/rs6000/power4.md

   1 ;; Scheduling description for IBM Power4 and PowerPC 970 processors.
   2 ;;   Copyright (C) 2003, 2004 Free Software Foundation, Inc.
   3 ;;
   4 ;; This file is part of GCC.
   5 ;;
   6 ;; GCC is free software; you can redistribute it and/or modify it
   7 ;; under the terms of the GNU General Public License as published
   8 ;; by the Free Software Foundation; either version 2, or (at your
   9 ;; option) any later version.
  10 ;;
  11 ;; GCC is distributed in the hope that it will be useful, but WITHOUT
  12 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13 ;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14 ;; License for more details.
  15 ;;
  16 ;; You should have received a copy of the GNU General Public License
  17 ;; along with GCC; see the file COPYING.  If not, write to the
  18 ;; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
  19 ;; MA 02110-1301, USA.
  20
  21 ;; Sources: IBM Red Book and White Paper on POWER4
  22
  23 ;; The POWER4 has 2 iu, 2 fpu, 2 lsu per engine (2 engines per chip).
  24 ;; Instructions that update more than one register get broken into two
  25 ;; (split) or more internal ops.  The chip can issue up to 5
  26 ;; internal ops per cycle.
  27
  28 (define_automaton "power4iu,power4fpu,power4vec,power4misc")
  29
  30 (define_cpu_unit "iu1_power4,iu2_power4" "power4iu")
  31 (define_cpu_unit "lsu1_power4,lsu2_power4" "power4misc")
  32 (define_cpu_unit "fpu1_power4,fpu2_power4" "power4fpu")
  33 (define_cpu_unit "bpu_power4,cru_power4" "power4misc")
  34 (define_cpu_unit "vec_power4,vecperm_power4" "power4vec")
  35 (define_cpu_unit "du1_power4,du2_power4,du3_power4,du4_power4,du5_power4"
  36                  "power4misc")
  37
  38 (define_reservation "lsq_power4"
  39                     "(du1_power4,lsu1_power4)\
  40                     |(du2_power4,lsu2_power4)\
  41                     |(du3_power4,lsu2_power4)\
  42                     |(du4_power4,lsu1_power4)")
  43
  44 (define_reservation "lsuq_power4"
  45                     "(du1_power4+du2_power4,lsu1_power4+iu2_power4)\
  46                     |(du2_power4+du3_power4,lsu2_power4+iu2_power4)\
  47                     |(du3_power4+du4_power4,lsu2_power4+iu1_power4)")
  48
  49 (define_reservation "iq_power4"
  50                     "(du1_power4,iu1_power4)\
  51                     |(du2_power4,iu2_power4)\
  52                     |(du3_power4,iu2_power4)\
  53                     |(du4_power4,iu1_power4)")
  54
  55 (define_reservation "fpq_power4"
  56                     "(du1_power4,fpu1_power4)\
  57                     |(du2_power4,fpu2_power4)\
  58                     |(du3_power4,fpu2_power4)\
  59                     |(du4_power4,fpu1_power4)")
  60
  61 (define_reservation "vq_power4"
  62                     "(du1_power4,vec_power4)\
  63                     |(du2_power4,vec_power4)\
  64                     |(du3_power4,vec_power4)\
  65                     |(du4_power4,vec_power4)")
  66
  67 (define_reservation "vpq_power4"
  68                     "(du1_power4,vecperm_power4)\
  69                     |(du2_power4,vecperm_power4)\
  70                     |(du3_power4,vecperm_power4)\
  71                     |(du4_power4,vecperm_power4)")
  72
  73
  74 ; Dispatch slots are allocated in order conforming to program order.
  75 (absence_set "du1_power4" "du2_power4,du3_power4,du4_power4,du5_power4")
  76 (absence_set "du2_power4" "du3_power4,du4_power4,du5_power4")
  77 (absence_set "du3_power4" "du4_power4,du5_power4")
  78 (absence_set "du4_power4" "du5_power4")
  79
  80
  81 ; Load/store
  82 (define_insn_reservation "power4-load" 4 ; 3
  83   (and (eq_attr "type" "load")
  84        (eq_attr "cpu" "power4"))
  85   "lsq_power4")
  86
  87 (define_insn_reservation "power4-load-ext" 5
  88   (and (eq_attr "type" "load_ext")
  89        (eq_attr "cpu" "power4"))
  90   "(du1_power4+du2_power4,lsu1_power4,nothing,nothing,iu2_power4)\
  91   |(du2_power4+du3_power4,lsu2_power4,nothing,nothing,iu2_power4)\
  92   |(du3_power4+du4_power4,lsu2_power4,nothing,nothing,iu1_power4)")
  93
  94 (define_insn_reservation "power4-load-ext-update" 5
  95   (and (eq_attr "type" "load_ext_u")
  96        (eq_attr "cpu" "power4"))
  97   "du1_power4+du2_power4+du3_power4+du4_power4,\
  98    lsu1_power4+iu2_power4,nothing,nothing,iu2_power4")
  99
 100 (define_insn_reservation "power4-load-ext-update-indexed" 5
 101   (and (eq_attr "type" "load_ext_ux")
 102        (eq_attr "cpu" "power4"))
 103   "du1_power4+du2_power4+du3_power4+du4_power4,\
 104    iu1_power4,lsu2_power4+iu1_power4,nothing,nothing,iu2_power4")
 105
 106 (define_insn_reservation "power4-load-update-indexed" 3
 107   (and (eq_attr "type" "load_ux")
 108        (eq_attr "cpu" "power4"))
 109   "du1_power4+du2_power4+du3_power4+du4_power4,\
 110    iu1_power4,lsu2_power4+iu2_power4")
 111
 112 (define_insn_reservation "power4-load-update" 4 ; 3
 113   (and (eq_attr "type" "load_u")
 114        (eq_attr "cpu" "power4"))
 115   "lsuq_power4")
 116
 117 (define_insn_reservation "power4-fpload" 6 ; 5
 118   (and (eq_attr "type" "fpload")
 119        (eq_attr "cpu" "power4"))
 120   "lsq_power4")
 121
 122 (define_insn_reservation "power4-fpload-update" 6 ; 5
 123   (and (eq_attr "type" "fpload_u,fpload_ux")
 124        (eq_attr "cpu" "power4"))
 125   "lsuq_power4")
 126
 127 (define_insn_reservation "power4-vecload" 6 ; 5
 128   (and (eq_attr "type" "vecload")
 129        (eq_attr "cpu" "power4"))
 130   "lsq_power4")
 131
 132 (define_insn_reservation "power4-store" 12
 133   (and (eq_attr "type" "store")
 134        (eq_attr "cpu" "power4"))
 135   "(du1_power4,lsu1_power4,iu1_power4)\
 136   |(du2_power4,lsu2_power4,iu2_power4)\
 137   |(du3_power4,lsu2_power4,iu2_power4)\
 138   |(du4_power4,lsu1_power4,iu1_power4)")
 139
 140 (define_insn_reservation "power4-store-update" 12
 141   (and (eq_attr "type" "store_u")
 142        (eq_attr "cpu" "power4"))
 143   "(du1_power4+du2_power4,lsu1_power4+iu2_power4,iu1_power4)\
 144   |(du2_power4+du3_power4,lsu2_power4+iu2_power4,iu2_power4)\
 145   |(du3_power4+du4_power4,lsu2_power4+iu1_power4,iu2_power4)\
 146   |(du3_power4+du4_power4,lsu2_power4,iu1_power4,iu2_power4)")
 147
 148 (define_insn_reservation "power4-store-update-indexed" 12
 149   (and (eq_attr "type" "store_ux")
 150        (eq_attr "cpu" "power4"))
 151    "du1_power4+du2_power4+du3_power4+du4_power4,\
 152     iu1_power4,lsu2_power4+iu2_power4,iu2_power4")
 153
 154 (define_insn_reservation "power4-fpstore" 12
 155   (and (eq_attr "type" "fpstore")
 156        (eq_attr "cpu" "power4"))
 157   "(du1_power4,lsu1_power4,fpu1_power4)\
 158   |(du2_power4,lsu2_power4,fpu2_power4)\
 159   |(du3_power4,lsu2_power4,fpu2_power4)\
 160   |(du4_power4,lsu1_power4,fpu1_power4)")
 161
 162 (define_insn_reservation "power4-fpstore-update" 12
 163   (and (eq_attr "type" "fpstore_u,fpstore_ux")
 164        (eq_attr "cpu" "power4"))
 165   "(du1_power4+du2_power4,lsu1_power4+iu2_power4,fpu1_power4)\
 166   |(du2_power4+du3_power4,lsu2_power4+iu2_power4,fpu2_power4)\
 167   |(du3_power4+du4_power4,lsu2_power4+iu1_power4,fpu2_power4)")
 168
 169 (define_insn_reservation "power4-vecstore" 12
 170   (and (eq_attr "type" "vecstore")
 171        (eq_attr "cpu" "power4"))
 172   "(du1_power4,lsu1_power4,vec_power4)\
 173   |(du2_power4,lsu2_power4,vec_power4)\
 174   |(du3_power4,lsu2_power4,vec_power4)\
 175   |(du4_power4,lsu1_power4,vec_power4)")
 176
 177 (define_insn_reservation "power4-llsc" 11
 178   (and (eq_attr "type" "load_l,store_c,sync")
 179        (eq_attr "cpu" "power4"))
 180   "du1_power4+du2_power4+du3_power4+du4_power4,\
 181   lsu1_power4")
 182
 183
 184 ; Integer latency is 2 cycles
 185 (define_insn_reservation "power4-integer" 2
 186   (and (eq_attr "type" "integer")
 187        (eq_attr "cpu" "power4"))
 188   "iq_power4")
 189
 190 (define_insn_reservation "power4-two" 2
 191   (and (eq_attr "type" "two")
 192        (eq_attr "cpu" "power4"))
 193   "(du1_power4+du2_power4,iu1_power4,nothing,iu2_power4)\
 194   |(du2_power4+du3_power4,iu2_power4,nothing,iu2_power4)\
 195   |(du3_power4+du4_power4,iu2_power4,nothing,iu1_power4)\
 196   |(du4_power4+du1_power4,iu1_power4,nothing,iu1_power4)")
 197
 198 (define_insn_reservation "power4-three" 2
 199   (and (eq_attr "type" "three")
 200        (eq_attr "cpu" "power4"))
 201   "(du1_power4+du2_power4+du3_power4,\
 202     iu1_power4,nothing,iu2_power4,nothing,iu2_power4)\
 203   |(du2_power4+du3_power4+du4_power4,\
 204     iu2_power4,nothing,iu2_power4,nothing,iu1_power4)\
 205   |(du3_power4+du4_power4+du1_power4,\
 206     iu2_power4,nothing,iu1_power4,nothing,iu1_power4)\
 207   |(du4_power4+du1_power4+du2_power4,\
 208     iu1_power4,nothing,iu2_power4,nothing,iu2_power4)")
 209
 210 (define_insn_reservation "power4-insert" 4
 211   (and (eq_attr "type" "insert_word")
 212        (eq_attr "cpu" "power4"))
 213   "(du1_power4+du2_power4,iu1_power4,nothing,iu2_power4)\
 214   |(du2_power4+du3_power4,iu2_power4,nothing,iu2_power4)\
 215   |(du3_power4+du4_power4,iu2_power4,nothing,iu1_power4)")
 216
 217 (define_insn_reservation "power4-cmp" 3
 218   (and (eq_attr "type" "cmp,fast_compare")
 219        (eq_attr "cpu" "power4"))
 220   "iq_power4")
 221
 222 (define_insn_reservation "power4-compare" 2
 223   (and (eq_attr "type" "compare,delayed_compare")
 224        (eq_attr "cpu" "power4"))
 225   "(du1_power4+du2_power4,iu1_power4,iu2_power4)\
 226   |(du2_power4+du3_power4,iu2_power4,iu2_power4)\
 227   |(du3_power4+du4_power4,iu2_power4,iu1_power4)")
 228
 229 (define_bypass 4 "power4-compare" "power4-branch,power4-crlogical,power4-delayedcr,power4-mfcr,power4-mfcrf")
 230
 231 (define_insn_reservation "power4-lmul-cmp" 7
 232   (and (eq_attr "type" "lmul_compare")
 233        (eq_attr "cpu" "power4"))
 234   "(du1_power4+du2_power4,iu1_power4*6,iu2_power4)\
 235   |(du2_power4+du3_power4,iu2_power4*6,iu2_power4)\
 236   |(du3_power4+du4_power4,iu2_power4*6,iu1_power4)")
 237
 238 (define_bypass 10 "power4-lmul-cmp" "power4-branch,power4-crlogical,power4-delayedcr,power4-mfcr,power4-mfcrf")
 239
 240 (define_insn_reservation "power4-imul-cmp" 5
 241   (and (eq_attr "type" "imul_compare")
 242        (eq_attr "cpu" "power4"))
 243   "(du1_power4+du2_power4,iu1_power4*4,iu2_power4)\
 244   |(du2_power4+du3_power4,iu2_power4*4,iu2_power4)\
 245   |(du3_power4+du4_power4,iu2_power4*4,iu1_power4)")
 246
 247 (define_bypass 8 "power4-imul-cmp" "power4-branch,power4-crlogical,power4-delayedcr,power4-mfcr,power4-mfcrf")
 248
 249 (define_insn_reservation "power4-lmul" 7
 250   (and (eq_attr "type" "lmul")
 251        (eq_attr "cpu" "power4"))
 252   "(du1_power4,iu1_power4*6)\
 253   |(du2_power4,iu2_power4*6)\
 254   |(du3_power4,iu2_power4*6)\
 255   |(du4_power4,iu1_power4*6)")
 256
 257 (define_insn_reservation "power4-imul" 5
 258   (and (eq_attr "type" "imul")
 259        (eq_attr "cpu" "power4"))
 260   "(du1_power4,iu1_power4*4)\
 261   |(du2_power4,iu2_power4*4)\
 262   |(du3_power4,iu2_power4*4)\
 263   |(du4_power4,iu1_power4*4)")
 264
 265 (define_insn_reservation "power4-imul3" 4
 266   (and (eq_attr "type" "imul2,imul3")
 267        (eq_attr "cpu" "power4"))
 268   "(du1_power4,iu1_power4*3)\
 269   |(du2_power4,iu2_power4*3)\
 270   |(du3_power4,iu2_power4*3)\
 271   |(du4_power4,iu1_power4*3)")
 272
 273
 274 ; SPR move only executes in first IU.
 275 ; Integer division only executes in second IU.
 276 (define_insn_reservation "power4-idiv" 36
 277   (and (eq_attr "type" "idiv")
 278        (eq_attr "cpu" "power4"))
 279   "du1_power4+du2_power4,iu2_power4*35")
 280
 281 (define_insn_reservation "power4-ldiv" 68
 282   (and (eq_attr "type" "ldiv")
 283        (eq_attr "cpu" "power4"))
 284   "du1_power4+du2_power4,iu2_power4*67")
 285
 286
 287 (define_insn_reservation "power4-mtjmpr" 3
 288   (and (eq_attr "type" "mtjmpr,mfjmpr")
 289        (eq_attr "cpu" "power4"))
 290   "du1_power4,bpu_power4")
 291
 292
 293 ; Branches take dispatch Slot 4.  The presence_sets prevent other insn from
 294 ; grabbing previous dispatch slots once this is assigned.
 295 (define_insn_reservation "power4-branch" 2
 296   (and (eq_attr "type" "jmpreg,branch")
 297        (eq_attr "cpu" "power4"))
 298   "(du5_power4\
 299    |du4_power4+du5_power4\
 300    |du3_power4+du4_power4+du5_power4\
 301    |du2_power4+du3_power4+du4_power4+du5_power4\
 302    |du1_power4+du2_power4+du3_power4+du4_power4+du5_power4),bpu_power4")
 303
 304
 305 ; Condition Register logical ops are split if non-destructive (RT != RB)
 306 (define_insn_reservation "power4-crlogical" 2
 307   (and (eq_attr "type" "cr_logical")
 308        (eq_attr "cpu" "power4"))
 309   "du1_power4,cru_power4")
 310
 311 (define_insn_reservation "power4-delayedcr" 4
 312   (and (eq_attr "type" "delayed_cr")
 313        (eq_attr "cpu" "power4"))
 314   "du1_power4+du2_power4,cru_power4,cru_power4")
 315
 316 ; 4 mfcrf (each 3 cyc, 1/cyc) + 3 fxu
 317 (define_insn_reservation "power4-mfcr" 6
 318   (and (eq_attr "type" "mfcr")
 319        (eq_attr "cpu" "power4"))
 320   "du1_power4+du2_power4+du3_power4+du4_power4,\
 321    du1_power4+du2_power4+du3_power4+du4_power4+cru_power4,\
 322    cru_power4,cru_power4,cru_power4")
 323
 324 ; mfcrf (1 field)
 325 (define_insn_reservation "power4-mfcrf" 3
 326   (and (eq_attr "type" "mfcrf")
 327        (eq_attr "cpu" "power4"))
 328   "du1_power4,cru_power4")
 329
 330 ; mtcrf (1 field)
 331 (define_insn_reservation "power4-mtcr" 4
 332   (and (eq_attr "type" "mtcr")
 333        (eq_attr "cpu" "power4"))
 334   "du1_power4,iu1_power4")
 335
 336 ; Basic FP latency is 6 cycles
 337 (define_insn_reservation "power4-fp" 6
 338   (and (eq_attr "type" "fp,dmul")
 339        (eq_attr "cpu" "power4"))
 340   "fpq_power4")
 341
 342 (define_insn_reservation "power4-fpcompare" 5
 343   (and (eq_attr "type" "fpcompare")
 344        (eq_attr "cpu" "power4"))
 345   "fpq_power4")
 346
 347 (define_insn_reservation "power4-sdiv" 33
 348   (and (eq_attr "type" "sdiv,ddiv")
 349        (eq_attr "cpu" "power4"))
 350   "(du1_power4,fpu1_power4*28)\
 351   |(du2_power4,fpu2_power4*28)\
 352   |(du3_power4,fpu2_power4*28)\
 353   |(du4_power4,fpu1_power4*28)")
 354
 355 (define_insn_reservation "power4-sqrt" 40
 356   (and (eq_attr "type" "ssqrt,dsqrt")
 357        (eq_attr "cpu" "power4"))
 358   "(du1_power4,fpu1_power4*35)\
 359   |(du2_power4,fpu2_power4*35)\
 360   |(du3_power4,fpu2_power4*35)\
 361   |(du4_power4,fpu2_power4*35)")
 362
 363 (define_insn_reservation "power4-isync" 2
 364   (and (eq_attr "type" "isync")
 365        (eq_attr "cpu" "power4"))
 366   "du1_power4+du2_power4+du3_power4+du4_power4,\
 367   lsu1_power4")
 368
 369
 370 ; VMX
 371 (define_insn_reservation "power4-vecsimple" 2
 372   (and (eq_attr "type" "vecsimple")
 373        (eq_attr "cpu" "power4"))
 374   "vq_power4")
 375
 376 (define_insn_reservation "power4-veccomplex" 5
 377   (and (eq_attr "type" "veccomplex")
 378        (eq_attr "cpu" "power4"))
 379   "vq_power4")
 380
 381 ; vecfp compare
 382 (define_insn_reservation "power4-veccmp" 8
 383   (and (eq_attr "type" "veccmp")
 384        (eq_attr "cpu" "power4"))
 385   "vq_power4")
 386
 387 (define_insn_reservation "power4-vecfloat" 8
 388   (and (eq_attr "type" "vecfloat")
 389        (eq_attr "cpu" "power4"))
 390   "vq_power4")
 391
 392 (define_insn_reservation "power4-vecperm" 2
 393   (and (eq_attr "type" "vecperm")
 394        (eq_attr "cpu" "power4"))
 395   "vpq_power4")
 396
 397 (define_bypass 4 "power4-vecload" "power4-vecperm")
 398
 399 (define_bypass 3 "power4-vecsimple" "power4-vecperm")
 400 (define_bypass 6 "power4-veccomplex" "power4-vecperm")
 401 (define_bypass 3 "power4-vecperm"
 402                  "power4-vecsimple,power4-veccomplex,power4-vecfloat")
 403 (define_bypass 9 "power4-vecfloat" "power4-vecperm")
 404
 405 (define_bypass 5 "power4-vecsimple,power4-veccomplex"
 406                  "power4-branch,power4-crlogical,power4-delayedcr,power4-mfcr,power4-mfcrf")
 407
 408 (define_bypass 4 "power4-vecsimple,power4-vecperm" "power4-vecstore")
 409 (define_bypass 7 "power4-veccomplex" "power4-vecstore")
 410 (define_bypass 10 "power4-vecfloat" "power4-vecstore")