4.0 KiB
;; Scheduling description for PowerPC 603 processor. ;; Copyright (C) 2003 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 2, 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 COPYING. If not, write to the ;; Free Software Foundation, 59 Temple Place - Suite 330, Boston, ;; MA 02111-1307, USA.
(define_automaton "ppc603,ppc603fp") (define_cpu_unit "iu_603" "ppc603") (define_cpu_unit "fpu_603" "ppc603fp") (define_cpu_unit "lsu_603,bpu_603,sru_603" "ppc603")
;; PPC603/PPC603e 32-bit IU, LSU, FPU, BPU, SRU ;; Max issue 3 insns/clock cycle (includes 1 branch)
;; Branches go straight to the BPU. All other insns are handled ;; by a dispatch unit which can issue a max of 2 insns per cycle.
;; The PPC603e user's manual recommends that to reduce branch mispredictions, ;; the insn that sets CR bits should be separated from the branch insn ;; that evaluates them; separation by more than 9 insns ensures that the CR ;; bits will be immediately available for execution. ;; This could be artificially achieved by exaggerating the latency of ;; compare insns but at the expense of a poorer schedule.
;; CR insns get executed in the SRU. Not modelled.
(define_insn_reservation "ppc603-load" 2 (and (eq_attr "type" "load,load_ext,load_ux,load_u") (eq_attr "cpu" "ppc603")) "lsu_603")
(define_insn_reservation "ppc603-store" 1 (and (eq_attr "type" "store,store_ux,store_u,fpstore,fpstore_ux,fpstore_u") (eq_attr "cpu" "ppc603")) "lsu_603")
(define_insn_reservation "ppc603-fpload" 2 (and (eq_attr "type" "fpload,fpload_ux,fpload_u") (eq_attr "cpu" "ppc603")) "lsu_603")
(define_insn_reservation "ppc603-integer" 1 (and (eq_attr "type" "integer,insert_word") (eq_attr "cpu" "ppc603")) "iu_603")
; This takes 2 or 3 cycles (define_insn_reservation "ppc603-imul" 3 (and (eq_attr "type" "imul,imul_compare") (eq_attr "cpu" "ppc603")) "iu_603*2")
(define_insn_reservation "ppc603-imul2" 2 (and (eq_attr "type" "imul2,imul3") (eq_attr "cpu" "ppc603")) "iu_603*2")
(define_insn_reservation "ppc603-idiv" 37 (and (eq_attr "type" "idiv") (eq_attr "cpu" "ppc603")) "iu_603*37")
(define_insn_reservation "ppc603-compare" 3 (and (eq_attr "type" "cmp,fast_compare,compare,delayed_compare") (eq_attr "cpu" "ppc603")) "iu_603,nothing,bpu_603")
(define_insn_reservation "ppc603-fpcompare" 3 (and (eq_attr "type" "fpcompare") (eq_attr "cpu" "ppc603")) "(fpu_603+iu_603*2),bpu_603")
(define_insn_reservation "ppc603-fp" 3 (and (eq_attr "type" "fp") (eq_attr "cpu" "ppc603")) "fpu_603")
(define_insn_reservation "ppc603-dmul" 4 (and (eq_attr "type" "dmul") (eq_attr "cpu" "ppc603")) "fpu_603*2")
; Divides are not pipelined (define_insn_reservation "ppc603-sdiv" 18 (and (eq_attr "type" "sdiv") (eq_attr "cpu" "ppc603")) "fpu_603*18")
(define_insn_reservation "ppc603-ddiv" 33 (and (eq_attr "type" "ddiv") (eq_attr "cpu" "ppc603")) "fpu_603*33")
(define_insn_reservation "ppc603-crlogical" 2 (and (eq_attr "type" "cr_logical,delayed_cr,mfcr,mtcr") (eq_attr "cpu" "ppc603")) "sru_603")
(define_insn_reservation "ppc603-mtjmpr" 4 (and (eq_attr "type" "mtjmpr") (eq_attr "cpu" "ppc603")) "sru_603")
(define_insn_reservation "ppc603-mfjmpr" 2 (and (eq_attr "type" "mfjmpr") (eq_attr "cpu" "ppc603")) "sru_603")
(define_insn_reservation "ppc603-jmpreg" 1 (and (eq_attr "type" "jmpreg,branch") (eq_attr "cpu" "ppc603")) "bpu_603")