Subversion Repositories openrisc_2011-10-31

;; Pipeline description for Motorola PowerPC 8540 processor.

;;   Copyright (C) 2003, 2004, 2007, 2009 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 "ppc8540_most,ppc8540_long,ppc8540_retire")

(define_cpu_unit "ppc8540_decode_0,ppc8540_decode_1" "ppc8540_most")

;; We don't simulate general issue queue (GIC).  If we have SU insn

;; and then SU1 insn, they cannot be issued on the same cycle

;; (although SU1 insn and then SU insn can be issued) because the SU

;; insn will go to SU1 from GIC0 entry.  Fortunately, the first cycle

;; multipass insn scheduling will find the situation and issue the SU1

;; insn and then the SU insn.

(define_cpu_unit "ppc8540_issue_0,ppc8540_issue_1"   "ppc8540_most")

;; We could describe completion buffers slots in combination with the

;; retirement units and the order of completion but the result

;; automaton would behave in the same way because we cannot describe

;; real latency time with taking in order completion into account.

;; Actually we could define the real latency time by querying reserved

;; automaton units but the current scheduler uses latency time before

;; issuing insns and making any reservations.

;;

;; So our description is aimed to achieve a insn schedule in which the

;; insns would not wait in the completion buffer.

(define_cpu_unit "ppc8540_retire_0,ppc8540_retire_1" "ppc8540_retire")

;; Branch unit:

(define_cpu_unit "ppc8540_bu" "ppc8540_most")

;; SU:

(define_cpu_unit "ppc8540_su0_stage0,ppc8540_su1_stage0" "ppc8540_most")

;; We could describe here MU subunits for float multiply, float add

;; etc.  But the result automaton would behave the same way as the

;; described one pipeline below because MU can start only one insn

;; per cycle.  Actually we could simplify the automaton more not

;; describing stages 1-3, the result automata would be the same.

(define_cpu_unit "ppc8540_mu_stage0,ppc8540_mu_stage1" "ppc8540_most")

(define_cpu_unit "ppc8540_mu_stage2,ppc8540_mu_stage3" "ppc8540_most")

;; The following unit is used to describe non-pipelined division.

(define_cpu_unit "ppc8540_mu_div" "ppc8540_long")

;; Here we simplified LSU unit description not describing the stages.

(define_cpu_unit "ppc8540_lsu" "ppc8540_most")

;; The following units are used to make automata deterministic

(define_cpu_unit "present_ppc8540_decode_0" "ppc8540_most")

(define_cpu_unit "present_ppc8540_issue_0" "ppc8540_most")

(define_cpu_unit "present_ppc8540_retire_0" "ppc8540_retire")

(define_cpu_unit "present_ppc8540_su0_stage0" "ppc8540_most")

;; The following sets to make automata deterministic when option ndfa is used.

(presence_set "present_ppc8540_decode_0" "ppc8540_decode_0")

(presence_set "present_ppc8540_issue_0" "ppc8540_issue_0")

(presence_set "present_ppc8540_retire_0" "ppc8540_retire_0")

(presence_set "present_ppc8540_su0_stage0" "ppc8540_su0_stage0")

;; Some useful abbreviations.

(define_reservation "ppc8540_decode"

    "ppc8540_decode_0|ppc8540_decode_1+present_ppc8540_decode_0")

(define_reservation "ppc8540_issue"

    "ppc8540_issue_0|ppc8540_issue_1+present_ppc8540_issue_0")

(define_reservation "ppc8540_retire"

   "ppc8540_retire_0|ppc8540_retire_1+present_ppc8540_retire_0")

(define_reservation "ppc8540_su_stage0"

   "ppc8540_su0_stage0|ppc8540_su1_stage0+present_ppc8540_su0_stage0")

;; Simple SU insns

(define_insn_reservation "ppc8540_su" 1

  (and (eq_attr "type" "integer,insert_word,insert_dword,cmp,compare,\

                        delayed_compare,var_delayed_compare,fast_compare,\

                        shift,trap,var_shift_rotate,cntlz,exts,isel")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

(define_insn_reservation "ppc8540_two" 1

  (and (eq_attr "type" "two")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire,\

   ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

(define_insn_reservation "ppc8540_three" 1

  (and (eq_attr "type" "three")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire,\

   ppc8540_issue+ppc8540_su_stage0+ppc8540_retire,\

   ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

;; Branch.  Actually this latency time is not used by the scheduler.

(define_insn_reservation "ppc8540_branch" 1

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

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_bu,ppc8540_retire")

;; Multiply

(define_insn_reservation "ppc8540_multiply" 4

  (and (eq_attr "type" "imul,imul2,imul3,imul_compare")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0,ppc8540_mu_stage1,\

   ppc8540_mu_stage2,ppc8540_mu_stage3+ppc8540_retire")

;; Divide.  We use the average latency time here.  We omit reserving a

;; retire unit because of the result automata will be huge.  We ignore

;; reservation of miu_stage3 here because we use the average latency

;; time.

(define_insn_reservation "ppc8540_divide" 14

  (and (eq_attr "type" "idiv")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0+ppc8540_mu_div,\

   ppc8540_mu_div*13")

;; CR logical

(define_insn_reservation "ppc8540_cr_logical" 1

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

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_bu,ppc8540_retire")

;; Mfcr

(define_insn_reservation "ppc8540_mfcr" 1

  (and (eq_attr "type" "mfcr")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su1_stage0+ppc8540_retire")

;; Mtcrf

(define_insn_reservation "ppc8540_mtcrf" 1

  (and (eq_attr "type" "mtcr")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su1_stage0+ppc8540_retire")

;; Mtjmpr

(define_insn_reservation "ppc8540_mtjmpr" 1

  (and (eq_attr "type" "mtjmpr,mfjmpr")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

;; Loads

(define_insn_reservation "ppc8540_load" 3

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

                        load_l,sync")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_lsu,nothing,ppc8540_retire")

;; Stores.

(define_insn_reservation "ppc8540_store" 3

  (and (eq_attr "type" "store,store_ux,store_u,store_c")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_lsu,nothing,ppc8540_retire")

;; Simple FP

(define_insn_reservation "ppc8540_simple_float" 1

  (and (eq_attr "type" "fpsimple")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

;; FP

(define_insn_reservation "ppc8540_float" 4

  (and (eq_attr "type" "fp")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0,ppc8540_mu_stage1,\

   ppc8540_mu_stage2,ppc8540_mu_stage3+ppc8540_retire")

;; float divides.  We omit reserving a retire unit and miu_stage3

;; because of the result automata will be huge.

(define_insn_reservation "ppc8540_float_vector_divide" 29

  (and (eq_attr "type" "vecfdiv")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0+ppc8540_mu_div,\

   ppc8540_mu_div*28")

;; Brinc

(define_insn_reservation "ppc8540_brinc" 1

  (and (eq_attr "type" "brinc")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

;; Simple vector

(define_insn_reservation "ppc8540_simple_vector" 1

  (and (eq_attr "type" "vecsimple")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su1_stage0+ppc8540_retire")

;; Simple vector compare

(define_insn_reservation "ppc8540_simple_vector_compare" 1

  (and (eq_attr "type" "veccmpsimple")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire")

;; Vector compare

(define_insn_reservation "ppc8540_vector_compare" 1

  (and (eq_attr "type" "veccmp")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su1_stage0+ppc8540_retire")

;; evsplatfi evsplati

(define_insn_reservation "ppc8540_vector_perm" 1

  (and (eq_attr "type" "vecperm")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_su1_stage0+ppc8540_retire")

;; Vector float

(define_insn_reservation "ppc8540_float_vector" 4

  (and (eq_attr "type" "vecfloat")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0,ppc8540_mu_stage1,\

   ppc8540_mu_stage2,ppc8540_mu_stage3+ppc8540_retire")

;; Vector divides: Use the average.  We omit reserving a retire unit

;; because of the result automata will be huge.  We ignore reservation

;; of miu_stage3 here because we use the average latency time.

(define_insn_reservation "ppc8540_vector_divide" 14

  (and (eq_attr "type" "vecdiv")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0+ppc8540_mu_div,\

   ppc8540_mu_div*13")

;; Complex vector.

(define_insn_reservation "ppc8540_complex_vector" 4

  (and (eq_attr "type" "veccomplex")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0,ppc8540_mu_stage1,\

   ppc8540_mu_stage2,ppc8540_mu_stage3+ppc8540_retire")

;; Vector load

(define_insn_reservation "ppc8540_vector_load" 3

  (and (eq_attr "type" "vecload")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_lsu,nothing,ppc8540_retire")

;; Vector store

(define_insn_reservation "ppc8540_vector_store" 3

  (and (eq_attr "type" "vecstore")

       (eq_attr "cpu" "ppc8540"))

  "ppc8540_decode,ppc8540_issue+ppc8540_lsu,nothing,ppc8540_retire")