;; Scheduling description for Niagara. ;; Copyright (C) 2006-2021 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/.

;; Niagara is a single-issue processor.

(define_automaton “niagara_0”)

(define_cpu_unit “niag_pipe” “niagara_0”)

(define_insn_reservation “niag_5cycle” 5 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “multi,flushw,iflush,trap”)) “niag_pipe*5”)

(define_insn_reservation “niag_4cycle” 4 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “savew”)) “niag_pipe*4”)

/* Most basic operations are single-cycle. */ (define_insn_reservation “niag_ialu” 1 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “ialu,shift,compare,cmove”)) “niag_pipe”)

(define_insn_reservation “niag_imul” 11 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “imul”)) “niag_pipe*11”)

(define_insn_reservation “niag_idiv” 72 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “idiv”)) “niag_pipe*72”)

(define_insn_reservation “niag_branch” 3 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “call,sibcall,call_no_delay_slot,uncond_branch,branch”)) “niag_pipe*3”)

(define_insn_reservation “niag_3cycle_load” 3 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “load”)) “niag_pipe*3”)

(define_insn_reservation “niag_9cycle_load” 9 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpload”)) “niag_pipe*9”)

(define_insn_reservation “niag_1cycle_store” 1 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “store”)) “niag_pipe”)

(define_insn_reservation “niag_8cycle_store” 8 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpstore”)) “niag_pipe*8”)

/* Things incorrectly modelled here:

  • FPADD{s,d}: 26 cycles
  • FPSUB{s,d}: 26 cycles
  • FABSD: 26 cycles
  • F{s,d}TO{s,d}: 26 cycles
  • F{s,d}TO{i,x}: 26 cycles
  • FSMULD: 29 cycles / (define_insn_reservation “niag_fmov” 8 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpmove,fpcmove,fpcrmove”)) "niag_pipe8")

(define_insn_reservation “niag_fpcmp” 26 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpcmp”)) “niag_pipe*26”)

(define_insn_reservation “niag_fmult” 29 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpmul”)) “niag_pipe*29”)

(define_insn_reservation “niag_fdivs” 54 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpdivs”)) “niag_pipe*54”)

(define_insn_reservation “niag_fdivd” 83 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fpdivd”)) “niag_pipe*83”)

/* Things incorrectly modelled here:

  • FPADD{16,32}: 10 cycles
  • FPSUB{16,32}: 10 cycles
  • FALIGNDATA: 10 cycles / (define_insn_reservation “niag_vis” 8 (and (eq_attr “cpu” “niagara”) (eq_attr “type” “fga,visl,viscmp,vismv,fgm_pack,fgm_mul,pdist,edge,edgen,gsr,array,bmask”)) "niag_pipe8")