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;; Pipeline model for Loongson-3A cores.
;; Copyright (C) 2011, 2012 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/>.
;; Uncomment the following line to output automata for debugging.
;; (automata_option "v")
;; Automaton for integer instructions.
(define_automaton "ls3a_a_alu")
;; Automaton for floating-point instructions.
(define_automaton "ls3a_a_falu")
;; Automaton for memory operations.
(define_automaton "ls3a_a_mem")
;; Describe the resources.
(define_cpu_unit "ls3a_alu1" "ls3a_a_alu")
(define_cpu_unit "ls3a_alu2" "ls3a_a_alu")
(define_cpu_unit "ls3a_mem" "ls3a_a_mem")
(define_cpu_unit "ls3a_falu1" "ls3a_a_falu")
(define_cpu_unit "ls3a_falu2" "ls3a_a_falu")
;; Describe instruction reservations.
(define_insn_reservation "ls3a_arith" 1
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "arith,clz,const,logical,
move,nop,shift,signext,slt"))
"ls3a_alu1 | ls3a_alu2")
(define_insn_reservation "ls3a_branch" 1
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "branch,jump,call,condmove,trap"))
"ls3a_alu1")
(define_insn_reservation "ls3a_mfhilo" 1
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "mfhi,mflo,mthi,mtlo"))
"ls3a_alu2")
;; Operation imul3nc is fully pipelined.
(define_insn_reservation "ls3a_imul3nc" 5
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "imul3nc"))
"ls3a_alu2")
(define_insn_reservation "ls3a_imul" 7
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "imul,imadd"))
"ls3a_alu2 * 7")
(define_insn_reservation "ls3a_idiv_si" 12
(and (eq_attr "cpu" "loongson_3a")
(and (eq_attr "type" "idiv")
(eq_attr "mode" "SI")))
"ls3a_alu2 * 12")
(define_insn_reservation "ls3a_idiv_di" 25
(and (eq_attr "cpu" "loongson_3a")
(and (eq_attr "type" "idiv")
(eq_attr "mode" "DI")))
"ls3a_alu2 * 25")
(define_insn_reservation "ls3a_load" 3
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "load"))
"ls3a_mem")
(define_insn_reservation "ls3a_fpload" 4
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "load,mfc,mtc"))
"ls3a_mem")
(define_insn_reservation "ls3a_prefetch" 0
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "prefetch,prefetchx"))
"ls3a_mem")
(define_insn_reservation "ls3a_store" 0
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "store,fpstore,fpidxstore"))
"ls3a_mem")
;; All the fp operations can be executed in FALU1. Only fp add,
;; sub, mul, madd can be executed in FALU2. Try FALU2 firstly.
(define_insn_reservation "ls3a_fadd" 6
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "fadd,fmul,fmadd"))
"ls3a_falu2 | ls3a_falu1")
(define_insn_reservation "ls3a_fcmp" 2
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "fabs,fcmp,fmove,fneg"))
"ls3a_falu1")
(define_insn_reservation "ls3a_fcvt" 4
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "fcvt"))
"ls3a_falu1")
(define_insn_reservation "ls3a_fdiv_sf" 12
(and (eq_attr "cpu" "loongson_3a")
(and (eq_attr "type" "fdiv,frdiv,fsqrt,frsqrt")
(eq_attr "mode" "SF")))
"ls3a_falu1 * 12")
(define_insn_reservation "ls3a_fdiv_df" 19
(and (eq_attr "cpu" "loongson_3a")
(and (eq_attr "type" "fdiv,frdiv,fsqrt,frsqrt")
(eq_attr "mode" "DF")))
"ls3a_falu1 * 19")
;; Force single-dispatch for unknown or multi.
(define_insn_reservation "ls3a_unknown" 1
(and (eq_attr "cpu" "loongson_3a")
(eq_attr "type" "unknown,multi,atomic,syncloop"))
"ls3a_alu1 + ls3a_alu2 + ls3a_falu1 + ls3a_falu2 + ls3a_mem")
;; End of DFA-based pipeline description for loongson_3a
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