67 lines
2.2 KiB
Markdown
67 lines
2.2 KiB
Markdown
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;; Scheduling description for LEON.
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;; Copyright (C) 2010-2021 Free Software Foundation, Inc.
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;;
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;; This file is part of GCC.
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;;
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;; GCC is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;;
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;; GCC is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with GCC; see the file COPYING3. If not see
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;; <http://www.gnu.org/licenses/>.
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;; Leon is a single-issue processor.
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(define_automaton "leon")
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(define_cpu_unit "leon_memory" "leon")
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(define_insn_reservation "leon_load" 1
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(and (eq_attr "cpu" "leon,leon3,leon3v7")
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(and (eq_attr "fix_ut699" "false") (eq_attr "type" "load,sload")))
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"leon_memory")
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;; Use a double reservation to work around the load pipeline hazard on UT699.
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(define_insn_reservation "ut699_load" 1
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(and (eq_attr "cpu" "leon,leon3,leon3v7")
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(and (eq_attr "fix_ut699" "true") (eq_attr "type" "load,sload")))
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"leon_memory*2")
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(define_insn_reservation "leon_store" 2
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(and (eq_attr "cpu" "leon,leon3,leon3v7") (eq_attr "type" "store"))
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"leon_memory*2")
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;; This describes Gaisler Research's FPU
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(define_automaton "grfpu")
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(define_cpu_unit "grfpu_alu" "grfpu")
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(define_cpu_unit "grfpu_ds" "grfpu")
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(define_insn_reservation "leon_fp_alu" 4
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(and (eq_attr "cpu" "leon,leon3,leon3v7") (eq_attr "type" "fp,fpcmp,fpmul"))
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"grfpu_alu, nothing*3")
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(define_insn_reservation "leon_fp_divs" 16
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(and (eq_attr "cpu" "leon,leon3,leon3v7") (eq_attr "type" "fpdivs"))
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"grfpu_ds*14, nothing*2")
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(define_insn_reservation "leon_fp_divd" 17
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(and (eq_attr "cpu" "leon,leon3,leon3v7") (eq_attr "type" "fpdivd"))
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"grfpu_ds*15, nothing*2")
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(define_insn_reservation "leon_fp_sqrts" 24
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(and (eq_attr "cpu" "leon,leon3,leon3v7") (eq_attr "type" "fpsqrts"))
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"grfpu_ds*22, nothing*2")
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(define_insn_reservation "leon_fp_sqrtd" 25
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(and (eq_attr "cpu" "leon,leon3,leon3v7") (eq_attr "type" "fpsqrtd"))
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"grfpu_ds*23, nothing*2")
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