arm-generic.md revision 169689
1;; Generic ARM Pipeline Description 2;; Copyright (C) 2003 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 by 8;; the Free Software Foundation; either version 2, or (at your option) 9;; any later version. 10;; 11;; GCC is distributed in the hope that it will be useful, but 12;; WITHOUT ANY WARRANTY; without even the implied warranty of 13;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14;; General Public 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 Free 18;; Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 19;; 02110-1301, USA. */ 20 21(define_automaton "arm") 22 23;; Write buffer 24; 25; Strictly, we should model a 4-deep write buffer for ARM7xx based chips 26; 27; The write buffer on some of the arm6 processors is hard to model exactly. 28; There is room in the buffer for up to two addresses and up to eight words 29; of memory, but the two needn't be split evenly. When writing the two 30; addresses are fully pipelined. However, a read from memory that is not 31; currently in the cache will block until the writes have completed. 32; It is normally the case that FCLK and MCLK will be in the ratio 2:1, so 33; writes will take 2 FCLK cycles per word, if FCLK and MCLK are asynchronous 34; (they aren't allowed to be at present) then there is a startup cost of 1MCLK 35; cycle to add as well. 36(define_cpu_unit "write_buf" "arm") 37 38;; Write blockage unit 39; 40; The write_blockage unit models (partially), the fact that reads will stall 41; until the write buffer empties. 42; The f_mem_r and r_mem_f could also block, but they are to the stack, 43; so we don't model them here 44(define_cpu_unit "write_blockage" "arm") 45 46;; Core 47; 48(define_cpu_unit "core" "arm") 49 50(define_insn_reservation "r_mem_f_wbuf" 5 51 (and (eq_attr "generic_sched" "yes") 52 (and (eq_attr "model_wbuf" "yes") 53 (eq_attr "type" "r_mem_f"))) 54 "core+write_buf*3") 55 56(define_insn_reservation "store_wbuf" 5 57 (and (eq_attr "generic_sched" "yes") 58 (and (eq_attr "model_wbuf" "yes") 59 (eq_attr "type" "store1"))) 60 "core+write_buf*3+write_blockage*5") 61 62(define_insn_reservation "store2_wbuf" 7 63 (and (eq_attr "generic_sched" "yes") 64 (and (eq_attr "model_wbuf" "yes") 65 (eq_attr "type" "store2"))) 66 "core+write_buf*4+write_blockage*7") 67 68(define_insn_reservation "store3_wbuf" 9 69 (and (eq_attr "generic_sched" "yes") 70 (and (eq_attr "model_wbuf" "yes") 71 (eq_attr "type" "store3"))) 72 "core+write_buf*5+write_blockage*9") 73 74(define_insn_reservation "store4_wbuf" 11 75 (and (eq_attr "generic_sched" "yes") 76 (and (eq_attr "model_wbuf" "yes") 77 (eq_attr "type" "store4"))) 78 "core+write_buf*6+write_blockage*11") 79 80(define_insn_reservation "store2" 3 81 (and (eq_attr "generic_sched" "yes") 82 (and (eq_attr "model_wbuf" "no") 83 (eq_attr "type" "store2"))) 84 "core*3") 85 86(define_insn_reservation "store3" 4 87 (and (eq_attr "generic_sched" "yes") 88 (and (eq_attr "model_wbuf" "no") 89 (eq_attr "type" "store3"))) 90 "core*4") 91 92(define_insn_reservation "store4" 5 93 (and (eq_attr "generic_sched" "yes") 94 (and (eq_attr "model_wbuf" "no") 95 (eq_attr "type" "store4"))) 96 "core*5") 97 98(define_insn_reservation "store_ldsched" 1 99 (and (eq_attr "generic_sched" "yes") 100 (and (eq_attr "ldsched" "yes") 101 (eq_attr "type" "store1"))) 102 "core") 103 104(define_insn_reservation "load_ldsched_xscale" 3 105 (and (eq_attr "generic_sched" "yes") 106 (and (eq_attr "ldsched" "yes") 107 (and (eq_attr "type" "load_byte,load1") 108 (eq_attr "is_xscale" "yes")))) 109 "core") 110 111(define_insn_reservation "load_ldsched" 2 112 (and (eq_attr "generic_sched" "yes") 113 (and (eq_attr "ldsched" "yes") 114 (and (eq_attr "type" "load_byte,load1") 115 (eq_attr "is_xscale" "no")))) 116 "core") 117 118(define_insn_reservation "load_or_store" 2 119 (and (eq_attr "generic_sched" "yes") 120 (and (eq_attr "ldsched" "!yes") 121 (eq_attr "type" "load_byte,load1,load2,load3,load4,store1"))) 122 "core*2") 123 124(define_insn_reservation "mult" 16 125 (and (eq_attr "generic_sched" "yes") 126 (and (eq_attr "ldsched" "no") (eq_attr "type" "mult"))) 127 "core*16") 128 129(define_insn_reservation "mult_ldsched_strongarm" 3 130 (and (eq_attr "generic_sched" "yes") 131 (and (eq_attr "ldsched" "yes") 132 (and (eq_attr "is_strongarm" "yes") 133 (eq_attr "type" "mult")))) 134 "core*2") 135 136(define_insn_reservation "mult_ldsched" 4 137 (and (eq_attr "generic_sched" "yes") 138 (and (eq_attr "ldsched" "yes") 139 (and (eq_attr "is_strongarm" "no") 140 (eq_attr "type" "mult")))) 141 "core*4") 142 143(define_insn_reservation "multi_cycle" 32 144 (and (eq_attr "generic_sched" "yes") 145 (and (eq_attr "core_cycles" "multi") 146 (eq_attr "type" "!mult,load_byte,load1,load2,load3,load4,store1,store2,store3,store4"))) 147 "core*32") 148 149(define_insn_reservation "single_cycle" 1 150 (and (eq_attr "generic_sched" "yes") 151 (eq_attr "core_cycles" "single")) 152 "core") 153