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;; DFA-based pipeline descriptions for MIPS32 5K processor family
;; Contributed by David Ung (davidu@mips.com)
;; and Nigel Stephens (nigel@mips.com)
;;
;; References:
;; "MIPS64 5K Processor Core Family Software User's Manual,
;; Doc no: MD00012, Rev 2.09, Jan 28, 2005."
;;
;; 5Kc - Single issue with no floating point unit.
;; 5kf - Separate floating point pipe which can dual-issue with the
;; integer pipe.
;;
;; Copyright (C) 2005-2016 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 "r5k_cpu, r5k_mdu, r5k_fpu")
;; Integer execution unit.
(define_cpu_unit "r5k_ixu_arith" "r5k_cpu")
(define_cpu_unit "r5k_ixu_mpydiv" "r5k_mdu")
(define_cpu_unit "r5kf_fpu_arith" "r5k_fpu")
(define_insn_reservation "r5k_int_load" 2
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "load"))
"r5k_ixu_arith")
(define_insn_reservation "r5k_int_prefetch" 1
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "prefetch,prefetchx"))
"r5k_ixu_arith")
(define_insn_reservation "r5k_int_store" 1
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "store"))
"r5k_ixu_arith")
;; Divides
(define_insn_reservation "r5k_int_divsi" 34
(and (eq_attr "cpu" "5kc,5kf")
(and (eq_attr "type" "idiv")
(eq_attr "mode" "!DI")))
"r5k_ixu_arith+(r5k_ixu_mpydiv*34)")
(define_insn_reservation "r5k_int_divdi" 66
(and (eq_attr "cpu" "5kc,5kf")
(and (eq_attr "type" "idiv")
(eq_attr "mode" "DI")))
"r5k_ixu_arith+(r5k_ixu_mpydiv*66)")
;; 32x32 multiply
;; 32x16 is faster, but there's no way to detect this
(define_insn_reservation "r5k_int_mult" 2
(and (eq_attr "cpu" "5kc,5kf")
(and (eq_attr "type" "imul,imadd")
(eq_attr "mode" "SI")))
"r5k_ixu_arith+(r5k_ixu_mpydiv*2)")
;; 64x64 multiply
(define_insn_reservation "r5k_int_mult_64" 9
(and (eq_attr "cpu" "5kc,5kf")
(and (eq_attr "type" "imul,imadd")
(eq_attr "mode" "DI")))
"r5k_ixu_arith+(r5k_ixu_mpydiv*2)")
;; 3 operand MUL 32x32
(define_insn_reservation "r5k_int_mul" 4
(and (eq_attr "cpu" "5kc,5kf")
(and (eq_attr "type" "imul3")
(eq_attr "mode" "SI")))
"r5k_ixu_arith+(r5k_ixu_mpydiv*2)")
;; Move to HI/LO -> MADD/MSUB,MFHI/MFLO has a 1 cycle latency.
(define_insn_reservation "r5k_int_mthilo" 1
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "mthi,mtlo"))
"r5k_ixu_arith+r5k_ixu_mpydiv")
;; Move from HI/LO -> integer operation has a 2 cycle latency.
(define_insn_reservation "r5k_int_mfhilo" 2
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "mfhi,mflo"))
"r5k_ixu_arith+r5k_ixu_mpydiv")
;; All other integer insns.
(define_insn_reservation "r5k_int_alu" 1
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "arith,condmove,const,logical,move,nop,shift,signext,slt"))
"r5k_ixu_arith")
(define_insn_reservation "r5k_int_branch" 1
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "branch"))
"r5k_ixu_arith")
;; JR/JALR always cause one pipeline bubble because of interlock.
(define_insn_reservation "r5k_int_jump" 2
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "jump,call"))
"r5k_ixu_arith")
;; Any -> JR/JALR (without dependency) : 1 clock issue delay
;; Any -> JR/JALR (with dependency) : 2 clock issue delay
;; load -> JR/JALR (with dependency) : 3 clock issue delay
;; mfhilo -> JR/JALR (with dependency) : 3 clock issue delay
;; mul -> JR/JALR (with dependency) : 3 clock issue delay
(define_bypass 2 "r5k_int_alu" "r5k_int_jump")
(define_bypass 3 "r5k_int_load" "r5k_int_jump")
(define_bypass 3 "r5k_int_mfhilo" "r5k_int_jump")
(define_bypass 3 "r5k_int_mul" "r5k_int_jump")
;; Unknown or multi - single issue
(define_insn_reservation "r5k_int_unknown" 1
(and (eq_attr "cpu" "5kc,5kf")
(eq_attr "type" "unknown,multi,atomic,syncloop"))
"r5k_ixu_arith+r5k_ixu_mpydiv")
;; Floating Point Instructions
;; The 5Kf is a partial dual-issue cpu which can dual issue an integer
;; and floating-point instruction in the same cycle.
;; fadd, fabs, fneg
(define_insn_reservation "r5kf_fadd" 4
(and (eq_attr "cpu" "5kf")
(eq_attr "type" "fadd,fabs,fneg"))
"r5kf_fpu_arith")
;; fmove, fcmove
(define_insn_reservation "r5kf_fmove" 4
(and (eq_attr "cpu" "5kf")
(eq_attr "type" "fmove"))
"r5kf_fpu_arith")
;; fload
(define_insn_reservation "r5kf_fload" 3
(and (eq_attr "cpu" "5kf")
(eq_attr "type" "fpload,fpidxload"))
"r5kf_fpu_arith")
;; fstore
(define_insn_reservation "r5kf_fstore" 1
(and (eq_attr "cpu" "5kf")
(eq_attr "type" "fpstore"))
"r5kf_fpu_arith")
;; fmul, fmadd
(define_insn_reservation "r5kf_fmul_sf" 4
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "fmul,fmadd")
(eq_attr "mode" "SF")))
"r5kf_fpu_arith")
(define_insn_reservation "r5kf_fmul_df" 5
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "fmul,fmadd")
(eq_attr "mode" "DF")))
"r5kf_fpu_arith*2")
;; fdiv, fsqrt, frsqrt
(define_insn_reservation "r5kf_fdiv_sf" 17
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "fdiv,fsqrt,frsqrt")
(eq_attr "mode" "SF")))
"r5kf_fpu_arith*14")
(define_insn_reservation "r5kf_fdiv_df" 32
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "fdiv,fsqrt")
(eq_attr "mode" "DF")))
"r5kf_fpu_arith*29")
;; frsqrt
(define_insn_reservation "r5kf_frsqrt_df" 35
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "frsqrt")
(eq_attr "mode" "DF")))
"r5kf_fpu_arith*31")
;; fcmp
(define_insn_reservation "r5kf_fcmp" 2
(and (eq_attr "cpu" "5kf")
(eq_attr "type" "fcmp"))
"r5kf_fpu_arith")
;; fcmp -> movf.fmt & movt.fmt bypass (dependency must be on condition)
(define_bypass 1 "r5kf_fcmp" "r5kf_fmove")
;; fcvt (cvt.d.s, cvt.[sd].[wl]
(define_insn_reservation "r5kf_fcvt_d2s" 4
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "fcvt")
(eq_attr "cnv_mode" "I2S,I2D,S2D")))
"r5kf_fpu_arith")
;; fcvt (cvt.s.d)
(define_insn_reservation "r5kf_fcvt_s2d" 6
(and (eq_attr "cpu" "5kc")
(and (eq_attr "type" "fcvt")
(eq_attr "cnv_mode" "D2S")))
"r5kf_fpu_arith")
;; fcvt (cvt.[wl].[sd], etc)
(define_insn_reservation "r5kf_fcvt_f2i" 5
(and (eq_attr "cpu" "5kf")
(and (eq_attr "type" "fcvt")
(eq_attr "cnv_mode" "S2I,D2I")))
"r5kf_fpu_arith")
;; fxfer (mfc1, mfhc1, mtc1, mthc1) - single issue
(define_insn_reservation "r5kf_fxfer" 2
(and (eq_attr "cpu" "5kf")
(eq_attr "type" "mfc,mtc"))
"r5k_ixu_arith+r5kf_fpu_arith")
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