;; Pipeline description for Motorola PowerPC 8540 processor. ;; Copyright (C) 2003-2022 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,add,logical,insert,cmp,\ shift,trap,cntlz,exts,isel") (eq_attr "cpu" "ppc8540,ppc8548")) "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire") (define_insn_reservation "ppc8540_two" 1 (and (eq_attr "type" "two") (eq_attr "cpu" "ppc8540,ppc8548")) "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,ppc8548")) "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,ppc8548")) "ppc8540_decode,ppc8540_bu,ppc8540_retire") ;; Multiply (define_insn_reservation "ppc8540_multiply" 4 (and (eq_attr "type" "mul") (eq_attr "cpu" "ppc8540,ppc8548")) "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" "div") (eq_attr "cpu" "ppc8540,ppc8548")) "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") (eq_attr "cpu" "ppc8540,ppc8548")) "ppc8540_decode,ppc8540_bu,ppc8540_retire") ;; Mfcr (define_insn_reservation "ppc8540_mfcr" 1 (and (eq_attr "type" "mfcr") (eq_attr "cpu" "ppc8540,ppc8548")) "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,ppc8548")) "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,ppc8548")) "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire") ;; Loads (define_insn_reservation "ppc8540_load" 3 (and (eq_attr "type" "load,load_l,sync") (eq_attr "cpu" "ppc8540,ppc8548")) "ppc8540_decode,ppc8540_issue+ppc8540_lsu,nothing,ppc8540_retire") ;; Stores. (define_insn_reservation "ppc8540_store" 3 (and (eq_attr "type" "store,store_c") (eq_attr "cpu" "ppc8540,ppc8548")) "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,ppc8548")) "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,ppc8548")) "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,ppc8548")) "ppc8540_decode,ppc8540_issue+ppc8540_mu_stage0+ppc8540_mu_div,\ ppc8540_mu_div*28") ;; Simple vector (define_insn_reservation "ppc8540_simple_vector" 1 (and (eq_attr "type" "vecsimple,veclogical,vecmove") (eq_attr "cpu" "ppc8540,ppc8548")) "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,ppc8548")) "ppc8540_decode,ppc8540_issue+ppc8540_su_stage0+ppc8540_retire") ;; Vector compare (define_insn_reservation "ppc8540_vector_compare" 1 (and (eq_attr "type" "veccmp,veccmpfx") (eq_attr "cpu" "ppc8540,ppc8548")) "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,ppc8548")) "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,ppc8548")) "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,ppc8548")) "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,ppc8548")) "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,ppc8548")) "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,ppc8548")) "ppc8540_decode,ppc8540_issue+ppc8540_lsu,nothing,ppc8540_retire")