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+;; Generic ARM Pipeline Description
+;; Copyright (C) 2003, 2007 Free Software Foundation, Inc.
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not see
+;; <http://www.gnu.org/licenses/>.  */
+
+(define_automaton "arm")
+
+;; Write buffer
+;
+; Strictly, we should model a 4-deep write buffer for ARM7xx based chips
+;
+; The write buffer on some of the arm6 processors is hard to model exactly.
+; There is room in the buffer for up to two addresses and up to eight words
+; of memory, but the two needn't be split evenly.  When writing the two
+; addresses are fully pipelined.  However, a read from memory that is not
+; currently in the cache will block until the writes have completed.
+; It is normally the case that FCLK and MCLK will be in the ratio 2:1, so
+; writes will take 2 FCLK cycles per word, if FCLK and MCLK are asynchronous
+; (they aren't allowed to be at present) then there is a startup cost of 1MCLK
+; cycle to add as well.
+(define_cpu_unit "write_buf" "arm")
+
+;; Write blockage unit
+;
+; The write_blockage unit models (partially), the fact that reads will stall
+; until the write buffer empties.
+; The f_mem_r and r_mem_f could also block, but they are to the stack,
+; so we don't model them here
+(define_cpu_unit "write_blockage" "arm")
+
+;; Core
+;
+(define_cpu_unit "core" "arm")
+
+(define_insn_reservation "r_mem_f_wbuf" 5
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "yes")
+	    (eq_attr "type" "r_mem_f")))
+  "core+write_buf*3")
+
+(define_insn_reservation "store_wbuf" 5
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "yes")
+       	    (eq_attr "type" "store1")))
+  "core+write_buf*3+write_blockage*5")
+
+(define_insn_reservation "store2_wbuf" 7
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "yes")
+	    (eq_attr "type" "store2")))
+  "core+write_buf*4+write_blockage*7")
+
+(define_insn_reservation "store3_wbuf" 9
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "yes")
+	    (eq_attr "type" "store3")))
+  "core+write_buf*5+write_blockage*9")
+
+(define_insn_reservation "store4_wbuf" 11
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "yes")
+            (eq_attr "type" "store4")))
+  "core+write_buf*6+write_blockage*11")
+
+(define_insn_reservation "store2" 3
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "no")
+            (eq_attr "type" "store2")))
+  "core*3")
+
+(define_insn_reservation "store3" 4
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "no")
+            (eq_attr "type" "store3")))
+  "core*4")
+
+(define_insn_reservation "store4" 5
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "model_wbuf" "no")
+	    (eq_attr "type" "store4")))
+  "core*5")
+
+(define_insn_reservation "store_ldsched" 1
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "yes") 
+	    (eq_attr "type" "store1")))
+  "core")
+
+(define_insn_reservation "load_ldsched_xscale" 3
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "yes") 
+	    (and (eq_attr "type" "load_byte,load1")
+	         (eq_attr "is_xscale" "yes"))))
+  "core")
+
+(define_insn_reservation "load_ldsched" 2
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "yes") 
+	    (and (eq_attr "type" "load_byte,load1")
+	         (eq_attr "is_xscale" "no"))))
+  "core")
+
+(define_insn_reservation "load_or_store" 2
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "!yes") 
+	    (eq_attr "type" "load_byte,load1,load2,load3,load4,store1")))
+  "core*2")
+
+(define_insn_reservation "mult" 16
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "no") (eq_attr "type" "mult")))
+  "core*16")
+
+(define_insn_reservation "mult_ldsched_strongarm" 3
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "yes") 
+	    (and (eq_attr "is_strongarm" "yes")
+	         (eq_attr "type" "mult"))))
+  "core*2")
+
+(define_insn_reservation "mult_ldsched" 4
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "ldsched" "yes") 
+	    (and (eq_attr "is_strongarm" "no")
+	         (eq_attr "type" "mult"))))
+  "core*4")
+
+(define_insn_reservation "multi_cycle" 32
+  (and (eq_attr "generic_sched" "yes")
+       (and (eq_attr "core_cycles" "multi")
+            (eq_attr "type" "!mult,load_byte,load1,load2,load3,load4,store1,store2,store3,store4")))
+  "core*32")
+
+(define_insn_reservation "single_cycle" 1
+  (and (eq_attr "generic_sched" "yes")
+       (eq_attr "core_cycles" "single"))
+  "core")