Subversion Repositories openrisc_2011-10-31

;; Scheduling description for PowerPC A2 processors.

;; Copyright (C) 2009 Free Software Foundation, Inc.

;; Contributed by Ben Elliston (bje@au.ibm.com)

;; 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

;; .

(define_automaton "ppca2")

;; CPU units

;; The multiplier pipeline.

(define_cpu_unit "mult" "ppca2")

;; The auxillary processor unit (FP/vector unit).

(define_cpu_unit "axu" "ppca2")

;; D.4.6

;; Some peculiarities for certain SPRs

(define_insn_reservation "ppca2-mfcr" 1

  (and (eq_attr "type" "mfcr")

       (eq_attr "cpu" "ppca2"))

   "nothing")

(define_insn_reservation "ppca2-mfjmpr" 5

  (and (eq_attr "type" "mfjmpr")

       (eq_attr "cpu" "ppca2"))

  "nothing")

(define_insn_reservation "ppca2-mtjmpr" 5

  (and (eq_attr "type" "mtjmpr")

       (eq_attr "cpu" "ppca2"))

  "nothing")

;; D.4.8

(define_insn_reservation "ppca2-imul" 1

  (and (eq_attr "type" "imul,imul2,imul3,imul_compare")

       (eq_attr "cpu" "ppca2"))

  "nothing")

;; FIXME: latency and multiplier reservation for 64-bit multiply?

(define_insn_reservation "ppca2-lmul" 6

  (and (eq_attr "type" "lmul,lmul_compare")

       (eq_attr "cpu" "ppca2"))

  "mult*3")

;; D.4.9

(define_insn_reservation "ppca2-idiv" 32

  (and (eq_attr "type" "idiv")

       (eq_attr "cpu" "ppca2"))

  "mult*32")

(define_insn_reservation "ppca2-ldiv" 65

  (and (eq_attr "type" "ldiv")

       (eq_attr "cpu" "ppca2"))

  "mult*65")

;; D.4.13

(define_insn_reservation "ppca2-load" 5

  (and (eq_attr "type" "load,load_ext,load_ext_u,load_ext_ux,load_ux,load_u")

       (eq_attr "cpu" "ppca2"))

  "nothing")

;; D.8.1

(define_insn_reservation "ppca2-fp" 6

  (and (eq_attr "type" "fp")               ;; Ignore fpsimple insn types (SPE only).

       (eq_attr "cpu" "ppca2"))

  "axu")

;; D.8.4

(define_insn_reservation "ppca2-fp-load" 6

  (and (eq_attr "type" "fpload,fpload_u,fpload_ux")

       (eq_attr "cpu" "ppca2"))

  "axu")

;; D.8.5

(define_insn_reservation "ppca2-fp-store" 2

  (and (eq_attr "type" "fpstore,fpstore_u,fpstore_ux")

       (eq_attr "cpu" "ppca2"))

  "axu")

;; D.8.6

(define_insn_reservation "ppca2-fpcompare" 5

  (and (eq_attr "type" "fpcompare")

       (eq_attr "cpu" "ppca2"))

 "axu")

;; D.8.7

;;

;; Instructions from the same thread succeeding the floating-point

;; divide cannot be executed until the floating-point divide has

;; completed.  Since there is nothing else we can do, this thread will

;; just have to stall.

(define_insn_reservation "ppca2-ddiv" 72

  (and (eq_attr "type" "ddiv")

       (eq_attr "cpu" "ppca2"))

   "axu")

(define_insn_reservation "ppca2-sdiv" 59

  (and (eq_attr "type" "sdiv")

       (eq_attr "cpu" "ppca2"))

   "axu")

;; D.8.8

;;

;; Instructions from the same thread succeeding the floating-point

;; divide cannot be executed until the floating-point divide has

;; completed.  Since there is nothing else we can do, this thread will

;; just have to stall.

(define_insn_reservation "ppca2-dsqrt" 69

  (and (eq_attr "type" "dsqrt")

       (eq_attr "cpu" "ppca2"))

  "axu")

(define_insn_reservation "ppca2-ssqrt" 65

  (and (eq_attr "type" "ssqrt")

       (eq_attr "cpu" "ppca2"))

  "axu")