;; Scheduling description for LEON5. ;; Copyright (C) 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/.

;; The LEON5 can often dual issue instructions from the same 64-bit aligned ;; double word if there are no data dependencies. ;; ;; Avoid scheduling load/store, FPU, and multiply instructions back to ;; back, regardless of data dependencies. ;; ;; Push comparisons away from the associated branch instruction. ;; ;; Avoid scheduling ALU instructions with data dependencies back to back. ;; ;; Schedule three instructions between load and dependent instruction.

(define_automaton “leon5”)

(define_cpu_unit “leon5_memory” “leon5”) (define_cpu_unit “leon5_mul” “leon5”) (define_cpu_unit “grfpu_d” “grfpu”) (define_cpu_unit “grfpu_s” “grfpu”)

(define_insn_reservation “leon5_load” 4 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “load,sload”)) “leon5_memory * 2, nothing * 2”)

(define_insn_reservation “leon5_fpload” 2 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fpload”)) “leon5_memory * 2 + grfpu_alu * 2”)

(define_insn_reservation “leon5_store” 2 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “store”)) “leon5_memory * 2”)

(define_insn_reservation “leon5_fpstore” 2 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fpstore”)) “leon5_memory * 2 + grfpu_alu * 2”)

(define_insn_reservation “leon5_ialu” 2 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “ialu, shift, ialuX”)) “nothing * 2”)

(define_insn_reservation “leon5_compare” 5 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “compare”)) “nothing * 5”)

(define_insn_reservation “leon5_imul” 4 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “imul”)) “leon5_mul * 2, nothing * 2”)

(define_insn_reservation “leon5_idiv” 35 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “imul”)) “nothing * 35”)

(define_insn_reservation “leon5_fp_alu” 5 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fp,fpcmp,fpmul,fpmove”)) “grfpu_alu * 2, nothing*3”)

(define_insn_reservation “leon5_fp_divs” 17 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fpdivs”)) “grfpu_alu * 2 + grfpu_d*16, nothing”)

(define_insn_reservation “leon5_fp_divd” 18 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fpdivd”)) “grfpu_alu * 2 + grfpu_d*17, nothing”)

(define_insn_reservation “leon5_fp_sqrts” 25 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fpsqrts”)) “grfpu_alu * 2 + grfpu_s*24, nothing”)

(define_insn_reservation “leon5_fp_sqrtd” 26 (and (eq_attr “cpu” “leon5”) (eq_attr “type” “fpsqrtd”)) “grfpu_alu * 2 + grfpu_s*25, nothing”)