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;; Scheduling description for Motorola PowerPC 750 and PowerPC 7400 processors.

;;   Copyright (C) 2003, 2004, 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

;; .

(define_automaton "ppc7xx,ppc7xxfp")

(define_cpu_unit "iu1_7xx,iu2_7xx" "ppc7xx")

(define_cpu_unit "fpu_7xx" "ppc7xxfp")

(define_cpu_unit "lsu_7xx,bpu_7xx,sru_7xx" "ppc7xx")

(define_cpu_unit "du1_7xx,du2_7xx" "ppc7xx")

(define_cpu_unit "veccmplx_7xx,vecperm_7xx,vdu_7xx" "ppc7xx")

;; PPC740/PPC750/PPC7400  32-bit 2xIU, LSU, SRU, FPU, BPU

;; IU1 can perform all integer operations

;; IU2 can perform all integer operations except imul and idiv

;; LSU 2 stage pipelined

;; FPU 3 stage pipelined

;; Max issue 3 insns/clock cycle (includes 1 branch)

;; In-order execution

;; The PPC750 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.  There is no advantage have more than 10 cycles

;; of separation.

;; This could be artificially achieved by exaggerating the latency of

;; compare insns but at the expense of a poorer schedule.

;; 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.

(define_reservation "ppc750_du" "du1_7xx|du2_7xx")

(define_reservation "ppc7400_vec_du" "vdu_7xx")

(define_insn_reservation "ppc750-load" 2

  (and (eq_attr "type" "load,load_ext,load_ext_u,load_ext_ux,\

                        load_ux,load_u,fpload,fpload_ux,fpload_u,\

                        vecload,load_l")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,lsu_7xx")

(define_insn_reservation "ppc750-store" 2

  (and (eq_attr "type" "store,store_ux,store_u,\

                        fpstore,fpstore_ux,fpstore_u,vecstore")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,lsu_7xx")

(define_insn_reservation "ppc750-storec" 8

  (and (eq_attr "type" "store_c")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,lsu_7xx")

(define_insn_reservation "ppc750-integer" 1

  (and (eq_attr "type" "integer,insert_word")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx|iu2_7xx")

(define_insn_reservation "ppc750-two" 1

  (and (eq_attr "type" "two")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx|iu2_7xx,iu1_7xx|iu2_7xx")

(define_insn_reservation "ppc750-three" 1

  (and (eq_attr "type" "three")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx|iu2_7xx,iu1_7xx|iu2_7xx,iu1_7xx|iu2_7xx")

(define_insn_reservation "ppc750-imul" 4

  (and (eq_attr "type" "imul,imul_compare")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx*4")

(define_insn_reservation "ppc750-imul2" 3

  (and (eq_attr "type" "imul2")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx*2")

(define_insn_reservation "ppc750-imul3" 2

  (and (eq_attr "type" "imul3")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx")

(define_insn_reservation "ppc750-idiv" 19

  (and (eq_attr "type" "idiv")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx*19")

(define_insn_reservation "ppc750-compare" 2

  (and (eq_attr "type" "cmp,fast_compare,compare,delayed_compare")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,(iu1_7xx|iu2_7xx)")

(define_insn_reservation "ppc750-fpcompare" 2

  (and (eq_attr "type" "fpcompare")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,fpu_7xx")

(define_insn_reservation "ppc750-fp" 3

  (and (eq_attr "type" "fp")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,fpu_7xx")

(define_insn_reservation "ppc750-dmul" 4

  (and (eq_attr "type" "dmul")

       (eq_attr "cpu" "ppc750"))

  "ppc750_du,fpu_7xx*2")

(define_insn_reservation "ppc7400-dmul" 3

  (and (eq_attr "type" "dmul")

       (eq_attr "cpu" "ppc7400"))

  "ppc750_du,fpu_7xx")

; Divides are not pipelined

(define_insn_reservation "ppc750-sdiv" 17

  (and (eq_attr "type" "sdiv")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,fpu_7xx*17")

(define_insn_reservation "ppc750-ddiv" 31

  (and (eq_attr "type" "ddiv")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,fpu_7xx*31")

(define_insn_reservation "ppc750-mfcr" 2

  (and (eq_attr "type" "mfcr,mtcr")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "ppc750_du,iu1_7xx")

(define_insn_reservation "ppc750-crlogical" 3

  (and (eq_attr "type" "cr_logical,delayed_cr")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "nothing,sru_7xx*2")

(define_insn_reservation "ppc750-mtjmpr" 2

  (and (eq_attr "type" "mtjmpr,isync,sync")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "nothing,sru_7xx*2")

(define_insn_reservation "ppc750-mfjmpr" 3

  (and (eq_attr "type" "mfjmpr")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "nothing,sru_7xx*2")

(define_insn_reservation "ppc750-jmpreg" 1

  (and (eq_attr "type" "jmpreg,branch,isync")

       (eq_attr "cpu" "ppc750,ppc7400"))

  "nothing,bpu_7xx")

;; Altivec

(define_insn_reservation "ppc7400-vecsimple" 1

  (and (eq_attr "type" "vecsimple,veccmp")

       (eq_attr "cpu" "ppc7400"))

  "ppc750_du,ppc7400_vec_du,veccmplx_7xx")

(define_insn_reservation "ppc7400-veccomplex" 4

  (and (eq_attr "type" "veccomplex")

       (eq_attr "cpu" "ppc7400"))

  "ppc750_du,ppc7400_vec_du,veccmplx_7xx")

(define_insn_reservation "ppc7400-vecfloat" 4

  (and (eq_attr "type" "vecfloat")

       (eq_attr "cpu" "ppc7400"))

  "ppc750_du,ppc7400_vec_du,veccmplx_7xx")

(define_insn_reservation "ppc7400-vecperm" 2

  (and (eq_attr "type" "vecperm")

       (eq_attr "cpu" "ppc7400"))

  "ppc750_du,ppc7400_vec_du,vecperm_7xx")