;; ARM Cortex-M7 pipeline description ;; Copyright (C) 2014-2021 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/.

(define_automaton “cortex_m7”)

;; We model the dual-issue constraints of this core with ;; following units.

(define_cpu_unit “cm7_i0, cm7_i1” “cortex_m7”) (define_cpu_unit “cm7_a0, cm7_a1” “cortex_m7”) (define_cpu_unit “cm7_branch,cm7_wb,cm7_ext,cm7_shf” “cortex_m7”) (define_cpu_unit “cm7_lsu” “cortex_m7”) (define_cpu_unit “cm7_mac” “cortex_m7”) (define_cpu_unit “cm7_fpu” “cortex_m7”)

(define_reservation “cm7_all_units” “cm7_i0+cm7_i1+cm7_a0+cm7_a1+cm7_branch
+cm7_wb+cm7_ext+cm7_shf+cm7_lsu+cm7_mac
+cm7_fpu”)

;; Simple alu instruction without inline shift operation. (define_insn_reservation “cortex_m7_alu_simple” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “alu_imm,alus_imm,logic_imm,logics_imm,
alu_sreg,alus_sreg,logic_reg,logics_reg,
adc_imm,adcs_imm,adc_reg,adcs_reg,
adr,bfm,rev,
shift_imm,shift_reg,
mov_imm,mov_reg,mvn_imm,mvn_reg,
mov_shift_reg,mov_shift,
mvn_shift,mvn_shift_reg,
logic_shift_imm,logics_shift_imm,
alu_shift_reg,alus_shift_reg,
logic_shift_reg,logics_shift_reg,
mrs,clz,f_mcr,f_mrc,multiple”)) “cm7_i0|cm7_i1,cm7_a0|cm7_a1”)

;; Simple alu with inline shift operation. (define_insn_reservation “cortex_m7_alu_shift” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “alu_shift_imm_lsl_1to4,alu_shift_imm_other,alus_shift_imm”)) “cm7_i0|cm7_i1,(cm7_a0|cm7_a1)+cm7_shf+cm7_branch”)

;; Only one ALU can be used for DSP instructions. (define_insn_reservation “cortex_m7_dsp” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “alu_dsp_reg,smlaxy,smlalxy,smulxy”)) “cm7_i0|cm7_i1,cm7_a0”)

;; The multiply instructions. (define_insn_reservation “cortex_m7_multiply” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “mul,muls,umull,smull”)) “cm7_i0|cm7_i1,(cm7_a0|cm7_a1)+cm7_wb”)

(define_insn_reservation “cortex_m7_idiv” 4 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “sdiv,udiv”)) “cm7_all_units*4”)

(define_insn_reservation “cortex_m7_alu_extend” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “extend”)) “cm7_i0|cm7_i1,(cm7_a0|cm7_a1)+cm7_ext+cm7_branch”)

(define_insn_reservation “cortex_m7_mac” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “mla,mlas”)) “cm7_i0|cm7_i1,cm7_mac+cm7_wb”)

;; The branch instructions. (define_insn_reservation “cortex_m7_branch” 0 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “branch,call”)) “cm7_i0|cm7_i1,cm7_branch”)

;; The load instructions. (define_insn_reservation “cortex_m7_load1” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “load_byte, load_4”)) “cm7_i0|cm7_i1,cm7_lsu”)

(define_insn_reservation “cortex_m7_load2” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “load_8”)) “cm7_all_units”)

(define_insn_reservation “cortex_m7_loadm” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “load_12,load_16”)) “cm7_all_units*2”)

;; The store instructions. (define_insn_reservation “cortex_m7_store1” 0 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “store_4”)) “cm7_i0|cm7_i1,cm7_lsu+cm7_wb”)

(define_insn_reservation “cortex_m7_store2” 0 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “store_8”)) “cm7_all_units”)

(define_insn_reservation “cortex_m7_storem” 0 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “store_12,store_16”)) “cm7_all_units*2”)

;; The FPU instructions. (define_insn_reservation “cortex_m7_fpalu” 3 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “ffariths,ffarithd,fadds,faddd,fmov,fconsts,
fconstd,fcmpd,f_cvt,f_cvtf2i,f_cvti2f, fcmps,
fmuls,f_flag”)) “cm7_i0|cm7_i1,cm7_fpu”)

(define_insn_reservation “cortex_m7_fmacs” 6 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “fmacs,ffmas”)) “cm7_i0|cm7_i1,cm7_fpu”)

(define_insn_reservation “cortex_m7_fdivs” 16 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “fdivs, fsqrts”)) “cm7_i0|cm7_i1, cm7_fpu*5”)

(define_insn_reservation “cortex_m7_f_loads” 2 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “f_loads”)) “cm7_i0|cm7_i1, cm7_lsu”)

(define_insn_reservation “cortex_m7_f_stores” 0 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “f_stores”)) “cm7_i0|cm7_i1, cm7_lsu+cm7_wb”)

(define_insn_reservation “cortex_m7_fmuld” 6 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “fmuld”)) “cm7_i0|cm7_i1,cm7_fpu*3”)

(define_insn_reservation “cortex_m7_fmacd” 10 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “fmacd,ffmad”)) “cm7_i0|cm7_i1,cm7_fpu*4”)

(define_insn_reservation “cortex_m7_fdivd” 31 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “fdivd,fsqrtd”)) “cm7_i0|cm7_i1,cm7_fpu*4”)

(define_insn_reservation “cortex_m7_f_loadd” 3 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “f_loadd”)) “cm7_all_units”)

(define_insn_reservation “cortex_m7_f_stored” 0 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “f_stored”)) “cm7_all_units”)

(define_insn_reservation “cortex_m7_f_mcr” 1 (and (eq_attr “tune” “cortexm7”) (eq_attr “type” “f_mcrr,f_mrrc”)) “cm7_all_units”)