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;; ARM Cortex-R4F VFP pipeline description
;; Copyright (C) 2007, 2008 Free Software Foundation, Inc.
;; Written by CodeSourcery.
;;
;; 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/>.
;; With the exception of simple VMOV <freg>, <freg> instructions and
;; the accululate operand of a multiply-accumulate instruction, all
;; registers are early registers. Thus base latencies are 1 more than
;; those listed in the TRM.
;; We use the A, B abd C units from the integer core, plus two additional
;; units to enforce VFP dual issue constraints.
;; A B C V1 VMLA
;; fcpy 1 2
;; farith 1 2 1
;; fmrc 1 2
;; fconst 1 2 * *
;; ffarith 1 2 * *
;; fmac 1 2 1 2
;; fdiv 1 2 *
;; f_loads * * *
;; f_stores * * *
(define_cpu_unit "cortex_r4_v1" "cortex_r4")
(define_cpu_unit "cortex_r4_vmla" "cortex_r4")
(define_reservation "cortex_r4_issue_ab"
"(cortex_r4_issue_a|cortex_r4_issue_b)")
(define_reservation "cortex_r4_single_issue"
"cortex_r4_issue_a+cortex_r4_issue_b")
(define_insn_reservation "cortex_r4_fcpys" 2
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fcpys"))
"cortex_r4_issue_ab")
(define_insn_reservation "cortex_r4_ffariths" 2
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "ffariths,fconsts,fcmps"))
"cortex_r4_issue_ab+cortex_r4_issue_c+cortex_r4_v1")
(define_insn_reservation "cortex_r4_fariths" 3
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fadds,fmuls"))
"(cortex_r4_issue_a+cortex_r4_v1)|cortex_r4_issue_b")
(define_insn_reservation "cortex_r4_fmacs" 6
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fmacs"))
"(cortex_r4_issue_a+cortex_r4_v1)|(cortex_r4_issue_b+cortex_r4_vmla)")
(define_insn_reservation "cortex_r4_fdivs" 17
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fdivs"))
"cortex_r4_issue_ab+cortex_r4_v1,cortex_r4_issue_a+cortex_r4_v1")
(define_insn_reservation "cortex_r4_floads" 2
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "f_loads"))
"cortex_r4_issue_a+cortex_r4_issue_c+cortex_r4_v1")
(define_insn_reservation "cortex_r4_fstores" 1
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "f_stores"))
"cortex_r4_issue_a+cortex_r4_issue_c+cortex_r4_vmla")
(define_insn_reservation "cortex_r4_mcr" 2
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "r_2_f"))
"cortex_r4_issue_ab")
(define_insn_reservation "cortex_r4_mrc" 3
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "f_2_r"))
"cortex_r4_issue_ab")
;; Bypasses for normal (not early) regs.
(define_bypass 1 "cortex_r4_ffariths,cortex_r4_fcpys,cortex_r4_mcr"
"cortex_r4_fcpys")
(define_bypass 2 "cortex_r4_fariths"
"cortex_r4_fcpys")
(define_bypass 5 "cortex_r4_fmacs"
"cortex_r4_fcpys")
(define_bypass 16 "cortex_r4_fdivs"
"cortex_r4_fcpys")
(define_bypass 1 "cortex_r4_ffariths,cortex_r4_fcpys,cortex_r4_mcr"
"cortex_r4_fmacs"
"arm_no_early_mul_dep")
(define_bypass 2 "cortex_r4_fariths"
"cortex_r4_fmacs"
"arm_no_early_mul_dep")
;; mac->mac has an extra forwarding path.
(define_bypass 3 "cortex_r4_fmacs"
"cortex_r4_fmacs"
"arm_no_early_mul_dep")
(define_bypass 16 "cortex_r4_fdivs"
"cortex_r4_fmacs"
"arm_no_early_mul_dep")
;; Double precision operations. These can not dual issue.
(define_insn_reservation "cortex_r4_fmacd" 20
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fmacd"))
"cortex_r4_single_issue*13")
(define_insn_reservation "cortex_r4_farith" 10
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "faddd,fmuld"))
"cortex_r4_single_issue*3")
;; FIXME: The short cycle count suggests these instructions complete
;; out of order. Chances are this is not a pipelined operation.
(define_insn_reservation "cortex_r4_fdivd" 97
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fdivd"))
"cortex_r4_single_issue*3")
(define_insn_reservation "cortex_r4_ffarithd" 2
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "ffarithd,fconstd"))
"cortex_r4_single_issue")
(define_insn_reservation "cortex_r4_fcmpd" 2
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "fcmpd"))
"cortex_r4_single_issue*2")
(define_insn_reservation "cortex_r4_f_cvt" 8
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "f_cvt"))
"cortex_r4_single_issue*3")
(define_insn_reservation "cortex_r4_f_memd" 8
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "f_loadd,f_stored"))
"cortex_r4_single_issue")
(define_insn_reservation "cortex_r4_f_flag" 1
(and (eq_attr "tune_cortexr4" "yes")
(eq_attr "type" "f_stores"))
"cortex_r4_single_issue")
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