Subversion Repositories openrisc_2011-10-31

;; Scheduling description for Renesas SH4a

;; Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc.

;;

;; This file is part of GCC.

;;

;; GNU CC 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.

;;

;; GNU CC 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

;; .

;; The following description models the SH4A pipeline

;; using the DFA based scheduler.

(define_automaton "sh4a")

(define_cpu_unit "sh4a_ex"   "sh4a")

(define_cpu_unit "sh4a_ls"   "sh4a")

(define_cpu_unit "sh4a_fex"  "sh4a")

(define_cpu_unit "sh4a_fls"  "sh4a")

(define_cpu_unit "sh4a_mult" "sh4a")

(define_cpu_unit "sh4a_fdiv" "sh4a")

;; Decoding is done on the integer pipeline like the

;; sh4. Define issue to be the | of the two pipelines

;; to control how often instructions are issued.

(define_reservation "ID_or" "sh4a_ex|sh4a_ls")

(define_reservation "ID_and" "sh4a_ex+sh4a_ls")

;; =======================================================

;; Locking Descriptions

;; Sh4a_Memory access on the LS pipeline.

(define_cpu_unit "sh4a_memory" "sh4a")

;; Other access on the LS pipeline.

(define_cpu_unit "sh4a_load_store" "sh4a")

;;  The address calculator used for branch instructions.

;; This will be reserved after "issue" of branch instructions

;; and this is to make sure that no two branch instructions

;; can be issued in parallel.

(define_reservation "sh4a_addrcalc" "sh4a_ex")

;; =======================================================

;; Reservations

;; Branch (BF,BF/S,BT,BT/S,BRA,BSR)

;; Group: BR

;; Latency when taken: 2

(define_insn_reservation "sh4a_branch" 2

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "cbranch,jump"))

  "ID_or+sh4a_addrcalc")

;; Jump (JSR,JMP,RTS)

;; Group: BR

;; Latency: 3

(define_insn_reservation "sh4a_jump" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "return,jump_ind"))

  "ID_or+sh4a_addrcalc")

;; RTE

;; Group: CO

;; Latency: 3

(define_insn_reservation "sh4a_rte" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "rte"))

  "ID_and*4")

;; EX Group Single

;; Group: EX

;; Latency: 0

(define_insn_reservation "sh4a_ex" 0

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "insn_class" "ex_group"))

  "sh4a_ex")

;; MOVA

;; Group: LS

;; Latency: 1

(define_insn_reservation "sh4a_mova" 1

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "mova"))

  "sh4a_ls+sh4a_load_store")

;; MOV

;; Group: MT

;; Latency: 0

;; ??? not sure if movi8 belongs here, but that's where it was

;; effectively before.

(define_insn_reservation "sh4a_mov" 0

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "move,movi8,gp_mac"))

  "ID_or")

;; Load

;; Group: LS

;; Latency: 3

(define_insn_reservation "sh4a_load" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "load,pcload,mem_mac"))

  "sh4a_ls+sh4a_memory")

(define_insn_reservation "sh4a_load_si" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "load_si,pcload_si"))

  "sh4a_ls+sh4a_memory")

;; Store

;; Group: LS

;; Latency: 0

(define_insn_reservation "sh4a_store" 0

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "store,fstore,mac_mem"))

  "sh4a_ls+sh4a_memory")

;; CWB TYPE

;; MOVUA

;; Group: LS

;; Latency: 3

(define_insn_reservation "sh4a_movua" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "movua"))

  "sh4a_ls+sh4a_memory*2")

;; Fixed point multiplication (single)

;; Group: CO

;; Latency: 2

(define_insn_reservation "sh4a_smult" 2

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "smpy"))

  "ID_or+sh4a_mult")

;; Fixed point multiplication (double)

;; Group: CO

;; Latency: 3

(define_insn_reservation "sh4a_dmult" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "dmpy"))

  "ID_or+sh4a_mult")

(define_insn_reservation "sh4a_mac_gp" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "mac_gp"))

  "ID_and")

;; Other MT  group instructions(1 step operations)

;; Group:       MT

;; Latency:     1

(define_insn_reservation "sh4a_mt" 1

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "mt_group"))

  "ID_or")

;; Floating point reg move

;; Group: LS

;; Latency: 2

(define_insn_reservation "sh4a_freg_mov" 2

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "fmove"))

  "sh4a_ls,sh4a_fls")

;; Single precision floating point computation FCMP/EQ,

;; FCMP/GT, FADD, FLOAT, FMAC, FMUL, FSUB, FTRC, FRVHG, FSCHG

;; Group:       FE

;; Latency:     3

(define_insn_reservation "sh4a_fp_arith"  3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "fp,fp_cmp,fpscr_toggle"))

  "ID_or,sh4a_fex")

(define_insn_reservation "sh4a_fp_arith_ftrc"  3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "ftrc_s"))

  "ID_or,sh4a_fex")

;; Single-precision FDIV/FSQRT

;; Group: FE

;; Latency: 20

(define_insn_reservation "sh4a_fdiv" 20

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "fdiv"))

  "ID_or,sh4a_fex+sh4a_fdiv,sh4a_fex")

;; Double Precision floating point computation

;; (FCNVDS, FCNVSD, FLOAT, FTRC)

;; Group:       FE

;; Latency:     3

(define_insn_reservation "sh4a_dp_float" 3

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "dfp_conv"))

  "ID_or,sh4a_fex")

;; Double-precision floating-point (FADD,FMUL,FSUB)

;; Group:       FE

;; Latency:     5

(define_insn_reservation "sh4a_fp_double_arith" 5

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "dfp_arith,dfp_mul"))

  "ID_or,sh4a_fex*3")

;; Double precision FDIV/SQRT

;; Group:       FE

;; Latency:     36

(define_insn_reservation "sh4a_dp_div" 36

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "dfdiv"))

  "ID_or,sh4a_fex+sh4a_fdiv,sh4a_fex*2")

;; FSRRA

;; Group: FE

;; Latency: 5

(define_insn_reservation "sh4a_fsrra" 5

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "fsrra"))

  "ID_or,sh4a_fex")

;; FSCA

;; Group: FE

;; Latency: 7

(define_insn_reservation "sh4a_fsca" 7

  (and (eq_attr "cpu" "sh4a")

       (eq_attr "type" "fsca"))

  "ID_or,sh4a_fex*3")