1;; DFA scheduling description for Renesas / SuperH SH. 2;; Copyright (C) 2004, 2006, 2007 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 7;; it under the terms of the GNU General Public License as published by 8;; the Free Software Foundation; either version 3, or (at your option) 9;; any later version. 10 11;; GCC is distributed in the hope that it will be useful, 12;; but WITHOUT ANY WARRANTY; without even the implied warranty of 13;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14;; GNU 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 COPYING3. If not see 18;; <http://www.gnu.org/licenses/>. 19 20;; Load and store instructions save a cycle if they are aligned on a 21;; four byte boundary. Using a function unit for stores encourages 22;; gcc to separate load and store instructions by one instruction, 23;; which makes it more likely that the linker will be able to word 24;; align them when relaxing. 25 26;; SH-1 scheduling. This is just a conversion of the old scheduling 27;; model, using define_function_unit. 28 29(define_automaton "sh1") 30(define_cpu_unit "sh1memory,sh1int,sh1mpy,sh1fp" "sh1") 31 32;; Loads have a latency of two. 33;; However, call insns can have a delay slot, so that we want one more 34;; insn to be scheduled between the load of the function address and the call. 35;; This is equivalent to a latency of three. 36;; ADJUST_COST can only properly handle reductions of the cost, so we 37;; use a latency of three here. 38;; We only do this for SImode loads of general registers, to make the work 39;; for ADJUST_COST easier. 40(define_insn_reservation "sh1_load_si" 3 41 (and (eq_attr "pipe_model" "sh1") 42 (eq_attr "type" "load_si,pcload_si")) 43 "sh1memory*2") 44 45(define_insn_reservation "sh1_load_store" 2 46 (and (eq_attr "pipe_model" "sh1") 47 (eq_attr "type" "load,pcload,pload,mem_mac,store,fstore,pstore,mac_mem")) 48 "sh1memory*2") 49 50(define_insn_reservation "sh1_arith3" 3 51 (and (eq_attr "pipe_model" "sh1") 52 (eq_attr "type" "arith3,arith3b")) 53 "sh1int*3") 54 55(define_insn_reservation "sh1_dyn_shift" 2 56 (and (eq_attr "pipe_model" "sh1") 57 (eq_attr "type" "dyn_shift")) 58 "sh1int*2") 59 60(define_insn_reservation "sh1_int" 1 61 (and (eq_attr "pipe_model" "sh1") 62 (eq_attr "type" "!arith3,arith3b,dyn_shift")) 63 "sh1int") 64 65;; ??? These are approximations. 66(define_insn_reservation "sh1_smpy" 2 67 (and (eq_attr "pipe_model" "sh1") 68 (eq_attr "type" "smpy")) 69 "sh1mpy*2") 70 71(define_insn_reservation "sh1_dmpy" 3 72 (and (eq_attr "pipe_model" "sh1") 73 (eq_attr "type" "dmpy")) 74 "sh1mpy*3") 75 76(define_insn_reservation "sh1_fp" 2 77 (and (eq_attr "pipe_model" "sh1") 78 (eq_attr "type" "fp,fpscr_toggle,fp_cmp,fmove")) 79 "sh1fp") 80 81(define_insn_reservation "sh1_fdiv" 13 82 (and (eq_attr "pipe_model" "sh1") 83 (eq_attr "type" "fdiv")) 84 "sh1fp*12") 85 86