gcc/config/s390/2064.md

   1 ;; Scheduling description for z900 (cpu 2064).
   2 ;;   Copyright (C) 2003 Free Software Foundation, Inc.
   3 ;;   Contributed by Hartmut Penner (hpenner@de.ibm.com) and
   4 ;;                  Ulrich Weigand (uweigand@de.ibm.com).
   5 ;;
   6 ;; This file is part of GNU CC.
   7 ;;
   8 ;; GNU CC is free software; you can redistribute it and/or modify
   9 ;; it under the terms of the GNU General Public License as published by
  10 ;; the Free Software Foundation; either version 2, or (at your option)
  11 ;; any later version.
  12 ;;
  13 ;; GNU CC is distributed in the hope that it will be useful,
  14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 ;; GNU General Public License for more details.
  17 ;;
  18 ;; You should have received a copy of the GNU General Public License
  19 ;; along with GNU CC; see the file COPYING.  If not, write to
  20 ;; the Free Software Foundation, 59 Temple Place - Suite 330,
  21 ;; Boston, MA 02111-1307, USA.
  22
  23 ;;
  24 ;; References:
  25 ;;   The microarchitecture of the IBM eServer z900 processor.
  26 ;;   E.M. Schwarz et al.
  27 ;;   IBM Journal of Research and Development Vol. 46 No 4/5, 2002.
  28 ;;
  29 ;;            z900 (cpu 2064) pipeline
  30 ;;
  31 ;;                 dec
  32 ;;              --> | <---
  33 ;;  LA bypass  |  agen    |
  34 ;;             |    |     |
  35 ;;              --- c1    |  Load bypass
  36 ;;                  |     |
  37 ;;                  c2----
  38 ;;                  |
  39 ;;                  e1
  40 ;;                  |
  41 ;;                  wr
  42
  43 (define_automaton "z_ipu")
  44 (define_cpu_unit "z_e1"   "z_ipu")
  45 (define_cpu_unit "z_wr"   "z_ipu")
  46
  47
  48 (define_insn_reservation "z_la" 1
  49   (and (eq_attr "cpu" "z900")
  50        (eq_attr "type" "la"))
  51   "z_e1,z_wr")
  52
  53 (define_insn_reservation "z_larl" 1
  54   (and (eq_attr "cpu" "z900")
  55        (eq_attr "type" "larl"))
  56   "z_e1,z_wr")
  57
  58 (define_insn_reservation "z_load" 1
  59   (and (eq_attr "cpu" "z900")
  60        (eq_attr "type" "load"))
  61   "z_e1,z_wr")
  62
  63 (define_insn_reservation "z_store" 1
  64   (and (eq_attr "cpu" "z900")
  65        (eq_attr "type" "store"))
  66   "z_e1,z_wr")
  67
  68 (define_insn_reservation "z_call" 5
  69   (and (eq_attr "cpu" "z900")
  70        (eq_attr "type" "jsr"))
  71   "z_e1*5,z_wr")
  72
  73 (define_insn_reservation "z_o2" 2
  74   (and (eq_attr "cpu" "z900")
  75        (eq_attr "type" "o2"))
  76   "z_e1*2,z_wr")
  77
  78 (define_insn_reservation "z_o3" 3
  79   (and (eq_attr "cpu" "z900")
  80        (eq_attr "type" "o3"))
  81   "z_e1*3,z_wr")
  82
  83 ;
  84 ; Insn still not mentioned are check for
  85 ; the usage of the agen unit
  86 ;
  87
  88 (define_insn_reservation "z_int" 1
  89   (and (eq_attr "cpu" "z900")
  90        (eq_attr "atype" "reg"))
  91   "z_e1,z_wr")
  92
  93 (define_insn_reservation "z_agen" 1
  94   (and (eq_attr "cpu" "z900")
  95        (eq_attr "atype" "agen"))
  96   "z_e1,z_wr")
  97
  98
  99 ;;
 100 ;; s390_agen_dep_p returns 1, if a register is set in the
 101 ;; first insn and used in the dependend insn to form a address.
 102 ;;
 103
 104 ;;
 105 ;; If a intruction uses a register to address memory, it needs
 106 ;; to be set 5 cycles in advance.
 107 ;;
 108
 109 (define_bypass 5 "z_int,z_agen"
 110                "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
 111
 112 ;;
 113 ;; A load type instruction uses a bypass to feed the result back
 114 ;; to the address generation pipeline stage.
 115 ;;
 116
 117 (define_bypass 3 "z_load"
 118                  "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
 119
 120 ;;
 121 ;; A load address type instruction uses a bypass to feed the
 122 ;; result back to the address generation pipeline stage.
 123 ;;
 124
 125 (define_bypass 2 "z_larl,z_la"
 126                  "z_agen,z_la,z_call,z_load,z_store" "s390_agen_dep_p")
 127
 128
 129
 130
 131