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;; Scheduling description for UltraSPARC-III.

;;   Copyright (C) 2002, 2004 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 2, 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 COPYING.  If not, write to

;; the Free Software Foundation, 51 Franklin Street, Fifth Floor,

;; Boston, MA 02110-1301, USA.

;; UltraSPARC-III is a quad-issue processor.

;;

;; It is also a much simpler beast than Ultra-I/II, no silly

;; slotting rules and both integer units are fully symmetric.

;; It does still have single-issue instructions though.

(define_automaton "ultrasparc3_0,ultrasparc3_1")

(define_cpu_unit "us3_ms,us3_br,us3_fpm" "ultrasparc3_0")

(define_cpu_unit "us3_a0,us3_a1,us3_slot0,\

                  us3_slot1,us3_slot2,us3_slot3,us3_fpa" "ultrasparc3_1")

(define_cpu_unit "us3_load_writeback" "ultrasparc3_1")

(define_reservation "us3_slotany" "(us3_slot0 | us3_slot1 | us3_slot2 | us3_slot3)")

(define_reservation "us3_single_issue" "us3_slot0 + us3_slot1 + us3_slot2 + us3_slot3")

(define_reservation "us3_ax" "(us3_a0 | us3_a1)")

(define_insn_reservation "us3_single" 1

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "multi,savew,flushw,iflush,trap"))

  "us3_single_issue")

(define_insn_reservation "us3_integer" 1

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "ialu,shift,compare"))

  "us3_ax + us3_slotany")

(define_insn_reservation "us3_ialuX" 5

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "ialu,shift,compare"))

  "us3_single_issue*4, nothing")

(define_insn_reservation "us3_cmove" 2

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "cmove"))

  "us3_ms + us3_br + us3_slotany, nothing")

;; ??? Not entirely accurate.

;; ??? It can run from 6 to 9 cycles.  The first cycle the MS pipe

;; ??? is needed, and the instruction group is broken right after

;; ??? the imul.  Then 'helper' instructions are generated to perform

;; ??? each further stage of the multiplication, each such 'helper' is

;; ??? single group.  So, the reservation aspect is represented accurately

;; ??? here, but the variable cycles are not.

;; ??? Currently I have no idea how to determine the variability, but once

;; ??? known we can simply add a define_bypass or similar to model it.

(define_insn_reservation "us3_imul" 7

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "imul"))

  "us3_ms + us3_slotany, us3_single_issue*4, nothing*2")

(define_insn_reservation "us3_idiv" 72

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "idiv"))

  "us3_ms + us3_slotany, us3_single_issue*69, nothing*2")

;; UltraSPARC-III has a similar load delay as UltraSPARC-I/II except

;; that all loads except 32-bit/64-bit unsigned loads take the extra

;; delay for sign/zero extension.

(define_insn_reservation "us3_2cycle_load" 2

  (and (eq_attr "cpu" "ultrasparc3")

    (and (eq_attr "type" "load,fpload")

      (eq_attr "us3load_type" "2cycle")))

  "us3_ms + us3_slotany, us3_load_writeback")

(define_insn_reservation "us3_load_delayed" 3

  (and (eq_attr "cpu" "ultrasparc3")

    (and (eq_attr "type" "load,sload")

      (eq_attr "us3load_type" "3cycle")))

  "us3_ms + us3_slotany, nothing, us3_load_writeback")

(define_insn_reservation "us3_store" 1

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "store,fpstore"))

  "us3_ms + us3_slotany")

(define_insn_reservation "us3_branch" 1

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "branch"))

  "us3_br + us3_slotany")

(define_insn_reservation "us3_call_jmpl" 1

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "call,sibcall,call_no_delay_slot,uncond_branch"))

  "us3_br + us3_ms + us3_slotany")

(define_insn_reservation "us3_fmov" 3

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpmove"))

  "us3_fpa + us3_slotany, nothing*2")

(define_insn_reservation "us3_fcmov" 3

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpcmove"))

  "us3_fpa + us3_br + us3_slotany, nothing*2")

(define_insn_reservation "us3_fcrmov" 3

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpcrmove"))

  "us3_fpa + us3_ms + us3_slotany, nothing*2")

(define_insn_reservation "us3_faddsub" 4

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fp"))

  "us3_fpa + us3_slotany, nothing*3")

(define_insn_reservation "us3_fpcmp" 5

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpcmp"))

  "us3_fpa + us3_slotany, nothing*4")

(define_insn_reservation "us3_fmult" 4

 (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpmul"))

  "us3_fpm + us3_slotany, nothing*3")

(define_insn_reservation "us3_fdivs" 17

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpdivs"))

  "(us3_fpm + us3_slotany), us3_fpm*14, nothing*2")

(define_insn_reservation "us3_fsqrts" 20

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpsqrts"))

  "(us3_fpm + us3_slotany), us3_fpm*17, nothing*2")

(define_insn_reservation "us3_fdivd" 20

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpdivd"))

  "(us3_fpm + us3_slotany), us3_fpm*17, nothing*2")

(define_insn_reservation "us3_fsqrtd" 29

  (and (eq_attr "cpu" "ultrasparc3")

    (eq_attr "type" "fpsqrtd"))

  "(us3_fpm + us3_slotany), us3_fpm*26, nothing*2")

;; Any store may multi issue with the insn creating the source

;; data as long as that creating insn is not an FPU div/sqrt.

;; We need a special guard function because this bypass does

;; not apply to the address inputs of the store.

(define_bypass 0 "us3_integer,us3_faddsub,us3_fmov,us3_fcmov,us3_fmult" "us3_store"

   "store_data_bypass_p")

;; An integer branch may execute in the same cycle as the compare

;; creating the condition codes.

(define_bypass 0 "us3_integer" "us3_branch")

;; If FMOVfcc is user of FPCMP, latency is only 1 cycle.

(define_bypass 1 "us3_fpcmp" "us3_fcmov")

;; VIS scheduling

(define_insn_reservation "us3_fga"

  3

  (and (eq_attr "cpu" "ultrasparc3")

       (eq_attr "type" "fga"))

  "us3_fpa + us3_slotany, nothing*2")

(define_insn_reservation "us3_fgm"

  4

  (and (eq_attr "cpu" "ultrasparc3")

       (eq_attr "type" "fgm_pack,fgm_mul,fgm_cmp"))

  "us3_fpm + us3_slotany, nothing*3")

(define_insn_reservation "us3_pdist"

  4

  (and (eq_attr "cpu" "ultrasparc3")

       (eq_attr "type" "fgm_pdist"))

  "us3_fpm + us3_slotany, nothing*3")

(define_bypass 1 "us3_pdist" "us3_pdist")