gcc/config/rs6000/power5.md

   1 ;; Scheduling description for IBM POWER5 processor.
   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, 59 Temple Place - Suite 330, Boston,
  19 ;; MA 02111-1307, USA.
  20
  21 ;; Sources: IBM Red Book and White Paper on POWER5
  22
  23 ;; The POWER5 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 "power5iu,power5fpu,power5misc")
  29
  30 (define_cpu_unit "iu1_power5,iu2_power5" "power5iu")
  31 (define_cpu_unit "lsu1_power5,lsu2_power5" "power5misc")
  32 (define_cpu_unit "fpu1_power5,fpu2_power5" "power5fpu")
  33 (define_cpu_unit "bpu_power5,cru_power5" "power5misc")
  34 (define_cpu_unit "du1_power5,du2_power5,du3_power5,du4_power5,du5_power5"
  35                  "power5misc")
  36
  37 (define_reservation "lsq_power5"
  38                     "(du1_power5,lsu1_power5)\
  39                     |(du2_power5,lsu2_power5)\
  40                     |(du3_power5,nothing,lsu2_power5)\
  41                     |(du4_power5,nothing,lsu1_power5)")
  42
  43 (define_reservation "iq_power5"
  44                     "(du1_power5,iu1_power5)\
  45                     |(du2_power5,iu2_power5)\
  46                     |(du3_power5,nothing,iu2_power5)\
  47                     |(du4_power5,nothing,iu1_power5)")
  48
  49 (define_reservation "fpq_power5"
  50                     "(du1_power5,fpu1_power5)\
  51                     |(du2_power5,fpu2_power5)\
  52                     |(du3_power5,nothing,fpu2_power5)\
  53                     |(du4_power5,nothing,fpu1_power5)")
  54
  55 ; Dispatch slots are allocated in order conforming to program order.
  56 (absence_set "du1_power5" "du2_power5,du3_power5,du4_power5,du5_power5")
  57 (absence_set "du2_power5" "du3_power5,du4_power5,du5_power5")
  58 (absence_set "du3_power5" "du4_power5,du5_power5")
  59 (absence_set "du4_power5" "du5_power5")
  60
  61
  62 ; Load/store
  63 (define_insn_reservation "power5-load" 4 ; 3
  64   (and (eq_attr "type" "load")
  65        (eq_attr "cpu" "power5"))
  66   "lsq_power5")
  67
  68 (define_insn_reservation "power5-load-ext" 5
  69   (and (eq_attr "type" "load_ext")
  70        (eq_attr "cpu" "power5"))
  71   "du1_power5+du2_power5,lsu1_power5,nothing,nothing,iu2_power5")
  72
  73 (define_insn_reservation "power5-load-ext-update" 5
  74   (and (eq_attr "type" "load_ext_u")
  75        (eq_attr "cpu" "power5"))
  76   "du1_power5+du2_power5+du3_power5+du4_power5,\
  77    lsu1_power5+iu2_power5,nothing,nothing,iu2_power5")
  78
  79 (define_insn_reservation "power5-load-ext-update-indexed" 5
  80   (and (eq_attr "type" "load_ext_ux")
  81        (eq_attr "cpu" "power5"))
  82   "du1_power5+du2_power5+du3_power5+du4_power5,\
  83    iu1_power5,lsu2_power5+iu1_power5,nothing,nothing,iu2_power5")
  84
  85 (define_insn_reservation "power5-load-update-indexed" 3
  86   (and (eq_attr "type" "load_ux")
  87        (eq_attr "cpu" "power5"))
  88   "du1_power5+du2_power5+du3_power5+du4_power5,\
  89    iu1_power5,lsu2_power5+iu2_power5")
  90
  91 (define_insn_reservation "power5-load-update" 4 ; 3
  92   (and (eq_attr "type" "load_u")
  93        (eq_attr "cpu" "power5"))
  94   "du1_power5+du2_power5,lsu1_power5+iu2_power5")
  95
  96 (define_insn_reservation "power5-fpload" 6 ; 5
  97   (and (eq_attr "type" "fpload")
  98        (eq_attr "cpu" "power5"))
  99   "lsq_power5")
 100
 101 (define_insn_reservation "power5-fpload-update" 6 ; 5
 102   (and (eq_attr "type" "fpload_u,fpload_ux")
 103        (eq_attr "cpu" "power5"))
 104   "du1_power5+du2_power5,lsu1_power5+iu2_power5")
 105
 106 (define_insn_reservation "power5-store" 1
 107   (and (eq_attr "type" "store")
 108        (eq_attr "cpu" "power5"))
 109   "(du1_power5,lsu1_power5,iu1_power5)\
 110   |(du2_power5,lsu2_power5,iu2_power5)\
 111   |(du3_power5,lsu2_power5,nothing,iu2_power5)\
 112   |(du4_power5,lsu1_power5,nothing,iu1_power5)")
 113
 114 (define_insn_reservation "power5-store-update" 1
 115   (and (eq_attr "type" "store_u")
 116        (eq_attr "cpu" "power5"))
 117   "du1_power5+du2_power5,lsu1_power5+iu2_power5,iu1_power5")
 118
 119 (define_insn_reservation "power5-store-update-indexed" 1
 120   (and (eq_attr "type" "store_ux")
 121        (eq_attr "cpu" "power5"))
 122    "du1_power5+du2_power5+du3_power5+du4_power5,\
 123     iu1_power5,lsu2_power5+iu2_power5,iu2_power5")
 124
 125 (define_insn_reservation "power5-fpstore" 1
 126   (and (eq_attr "type" "fpstore")
 127        (eq_attr "cpu" "power5"))
 128   "(du1_power5,lsu1_power5,fpu1_power5)\
 129   |(du2_power5,lsu2_power5,fpu2_power5)\
 130   |(du3_power5,lsu2_power5,nothing,fpu2_power5)\
 131   |(du4_power5,lsu1_power5,nothing,fpu1_power5)")
 132
 133 (define_insn_reservation "power5-fpstore-update" 1
 134   (and (eq_attr "type" "fpstore_u,fpstore_ux")
 135        (eq_attr "cpu" "power5"))
 136   "du1_power5+du2_power5,lsu1_power5+iu2_power5,fpu1_power5")
 137
 138
 139 ; Integer latency is 2 cycles
 140 (define_insn_reservation "power5-integer" 2
 141   (and (eq_attr "type" "integer")
 142        (eq_attr "cpu" "power5"))
 143   "iq_power5")
 144
 145 (define_insn_reservation "power5-insert" 4
 146   (and (eq_attr "type" "insert_word")
 147        (eq_attr "cpu" "power5"))
 148   "du1_power5+du2_power5,iu1_power5,nothing,iu2_power5")
 149
 150 (define_insn_reservation "power5-cmp" 3
 151   (and (eq_attr "type" "cmp,fast_compare")
 152        (eq_attr "cpu" "power5"))
 153   "iq_power5")
 154
 155 (define_insn_reservation "power5-compare" 2
 156   (and (eq_attr "type" "compare,delayed_compare")
 157        (eq_attr "cpu" "power5"))
 158   "du1_power5+du2_power5,iu1_power5,iu2_power5")
 159
 160 (define_bypass 4 "power5-compare" "power5-branch,power5-crlogical,power5-delayedcr,power5-mfcr,power5-mfcrf")
 161
 162 (define_insn_reservation "power5-lmul-cmp" 7
 163   (and (eq_attr "type" "lmul_compare")
 164        (eq_attr "cpu" "power5"))
 165   "du1_power5+du2_power5,iu1_power5*6,iu2_power5")
 166
 167 (define_bypass 10 "power5-lmul-cmp" "power5-branch,power5-crlogical,power5-delayedcr,power5-mfcr,power5-mfcrf")
 168
 169 (define_insn_reservation "power5-imul-cmp" 5
 170   (and (eq_attr "type" "imul_compare")
 171        (eq_attr "cpu" "power5"))
 172   "du1_power5+du2_power5,iu1_power5*4,iu2_power5")
 173
 174 (define_bypass 8 "power5-imul-cmp" "power5-branch,power5-crlogical,power5-delayedcr,power5-mfcr,power5-mfcrf")
 175
 176 (define_insn_reservation "power5-lmul" 7
 177   (and (eq_attr "type" "lmul")
 178        (eq_attr "cpu" "power5"))
 179   "(du1_power5,iu1_power5*6)\
 180   |(du2_power5,iu2_power5*6)\
 181   |(du3_power5,iu2_power5*6)\
 182   |(du4_power5,iu2_power5*6)")
 183 ;  |(du3_power5,nothing,iu2_power5*6)\
 184 ;  |(du4_power5,nothing,iu2_power5*6)")
 185
 186 (define_insn_reservation "power5-imul" 5
 187   (and (eq_attr "type" "imul")
 188        (eq_attr "cpu" "power5"))
 189   "(du1_power5,iu1_power5*4)\
 190   |(du2_power5,iu2_power5*4)\
 191   |(du3_power5,iu2_power5*4)\
 192   |(du4_power5,iu1_power5*4)")
 193 ;  |(du3_power5,nothing,iu2_power5*4)\
 194 ;  |(du4_power5,nothing,iu1_power5*4)")
 195
 196 (define_insn_reservation "power5-imul3" 4
 197   (and (eq_attr "type" "imul2,imul3")
 198        (eq_attr "cpu" "power5"))
 199   "(du1_power5,iu1_power5*3)\
 200   |(du2_power5,iu2_power5*3)\
 201   |(du3_power5,iu2_power5*3)\
 202   |(du4_power5,iu1_power5*3)")
 203 ;  |(du3_power5,nothing,iu2_power5*3)\
 204 ;  |(du4_power5,nothing,iu1_power5*3)")
 205
 206
 207 ; SPR move only executes in first IU.
 208 ; Integer division only executes in second IU.
 209 (define_insn_reservation "power5-idiv" 36
 210   (and (eq_attr "type" "idiv")
 211        (eq_attr "cpu" "power5"))
 212   "du1_power5+du2_power5,iu2_power5*35")
 213
 214 (define_insn_reservation "power5-ldiv" 68
 215   (and (eq_attr "type" "ldiv")
 216        (eq_attr "cpu" "power5"))
 217   "du1_power5+du2_power5,iu2_power5*67")
 218
 219
 220 (define_insn_reservation "power5-mtjmpr" 3
 221   (and (eq_attr "type" "mtjmpr,mfjmpr")
 222        (eq_attr "cpu" "power5"))
 223   "du1_power5,bpu_power5")
 224
 225
 226 ; Branches take dispatch Slot 4.  The presence_sets prevent other insn from
 227 ; grabbing previous dispatch slots once this is assigned.
 228 (define_insn_reservation "power5-branch" 2
 229   (and (eq_attr "type" "jmpreg,branch")
 230        (eq_attr "cpu" "power5"))
 231   "(du5_power5\
 232    |du4_power5+du5_power5\
 233    |du3_power5+du4_power5+du5_power5\
 234    |du2_power5+du3_power5+du4_power5+du5_power5\
 235    |du1_power5+du2_power5+du3_power5+du4_power5+du5_power5),bpu_power5")
 236
 237
 238 ; Condition Register logical ops are split if non-destructive (RT != RB)
 239 (define_insn_reservation "power5-crlogical" 2
 240   (and (eq_attr "type" "cr_logical")
 241        (eq_attr "cpu" "power5"))
 242   "du1_power5,cru_power5")
 243
 244 (define_insn_reservation "power5-delayedcr" 4
 245   (and (eq_attr "type" "delayed_cr")
 246        (eq_attr "cpu" "power5"))
 247   "du1_power5+du2_power5,cru_power5,cru_power5")
 248
 249 ; 4 mfcrf (each 3 cyc, 1/cyc) + 3 fxu
 250 (define_insn_reservation "power5-mfcr" 6
 251   (and (eq_attr "type" "mfcr")
 252        (eq_attr "cpu" "power5"))
 253   "du1_power5+du2_power5+du3_power5+du4_power5,\
 254    du1_power5+du2_power5+du3_power5+du4_power5+cru_power5,\
 255    cru_power5,cru_power5,cru_power5")
 256
 257 ; mfcrf (1 field)
 258 (define_insn_reservation "power5-mfcrf" 3
 259   (and (eq_attr "type" "mfcrf")
 260        (eq_attr "cpu" "power5"))
 261   "du1_power5,cru_power5")
 262
 263 ; mtcrf (1 field)
 264 (define_insn_reservation "power5-mtcr" 4
 265   (and (eq_attr "type" "mtcr")
 266        (eq_attr "cpu" "power5"))
 267   "du1_power5,iu1_power5")
 268
 269 ; Basic FP latency is 6 cycles
 270 (define_insn_reservation "power5-fp" 6
 271   (and (eq_attr "type" "fp,dmul")
 272        (eq_attr "cpu" "power5"))
 273   "fpq_power5")
 274
 275 (define_insn_reservation "power5-fpcompare" 5
 276   (and (eq_attr "type" "fpcompare")
 277        (eq_attr "cpu" "power5"))
 278   "fpq_power5")
 279
 280 (define_insn_reservation "power5-sdiv" 33
 281   (and (eq_attr "type" "sdiv,ddiv")
 282        (eq_attr "cpu" "power5"))
 283   "(du1_power5,fpu1_power5*28)\
 284   |(du2_power5,fpu2_power5*28)\
 285   |(du3_power5,fpu2_power5*28)\
 286   |(du4_power5,fpu1_power5*28)")
 287 ;  |(du3_power5,nothing,fpu2_power5*28)\
 288 ;  |(du4_power5,nothing,fpu1_power5*28)")
 289
 290 (define_insn_reservation "power5-sqrt" 40
 291   (and (eq_attr "type" "ssqrt,dsqrt")
 292        (eq_attr "cpu" "power5"))
 293   "(du1_power5,fpu1_power5*35)\
 294   |(du2_power5,fpu2_power5*35)\
 295   |(du3_power5,fpu2_power5*35)\
 296   |(du4_power5,fpu2_power5*35)")
 297 ;  |(du3_power5,nothing,fpu2_power5*35)\
 298 ;  |(du4_power5,nothing,fpu2_power5*35)")
 299