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+;; DFA scheduling description for Renesas / SuperH SH.
+;; Copyright (C) 2004, 2006, 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/>.
+
+;; Load and store instructions save a cycle if they are aligned on a
+;; four byte boundary.  Using a function unit for stores encourages
+;; gcc to separate load and store instructions by one instruction,
+;; which makes it more likely that the linker will be able to word
+;; align them when relaxing.
+
+;; SH-1 scheduling.  This is just a conversion of the old scheduling
+;; model, using define_function_unit.
+
+(define_automaton "sh1")
+(define_cpu_unit "sh1memory,sh1int,sh1mpy,sh1fp" "sh1")
+
+;; Loads have a latency of two.
+;; However, call insns can have a delay slot, so that we want one more
+;; insn to be scheduled between the load of the function address and the call.
+;; This is equivalent to a latency of three.
+;; ADJUST_COST can only properly handle reductions of the cost, so we
+;; use a latency of three here.
+;; We only do this for SImode loads of general registers, to make the work
+;; for ADJUST_COST easier.
+(define_insn_reservation "sh1_load_si" 3
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "load_si,pcload_si"))
+  "sh1memory*2")
+
+(define_insn_reservation "sh1_load_store" 2
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "load,pcload,pload,mem_mac,store,fstore,pstore,mac_mem"))
+  "sh1memory*2")
+
+(define_insn_reservation "sh1_arith3" 3
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "arith3,arith3b"))
+  "sh1int*3")
+
+(define_insn_reservation "sh1_dyn_shift" 2
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "dyn_shift"))
+  "sh1int*2")
+
+(define_insn_reservation "sh1_int" 1
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "!arith3,arith3b,dyn_shift"))
+  "sh1int")
+
+;; ??? These are approximations.
+(define_insn_reservation "sh1_smpy" 2
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "smpy"))
+  "sh1mpy*2")
+
+(define_insn_reservation "sh1_dmpy" 3
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "dmpy"))
+  "sh1mpy*3")
+
+(define_insn_reservation "sh1_fp" 2
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "fp,fpscr_toggle,fp_cmp,fmove"))
+  "sh1fp")
+
+(define_insn_reservation "sh1_fdiv" 13
+  (and (eq_attr "pipe_model" "sh1")
+       (eq_attr "type" "fdiv"))
+  "sh1fp*12")
+