Imported gcc-4.4.3

[msp430-gcc.git] / gcc / config / arm / vfp11.md

diff --git a/gcc/config/arm/vfp11.md b/gcc/config/arm/vfp11.md
new file mode 100644 (file)
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+++ b/gcc/config/arm/vfp11.md
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+;; ARM VFP11 pipeline description
+;; Copyright (C) 2003, 2005, 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/>.
+
+(define_automaton "vfp11")
+
+;; There are 3 pipelines in the VFP11 unit.
+;;
+;; - A 8-stage FMAC pipeline (7 execute + writeback) with forward from
+;;   fourth stage for simple operations.
+;;
+;; - A 5-stage DS pipeline (4 execute + writeback) for divide/sqrt insns.
+;;   These insns also uses first execute stage of FMAC pipeline.
+;;
+;; - A 4-stage LS pipeline (execute + 2 memory + writeback) with forward from
+;;   second memory stage for loads.
+
+;; We do not model Write-After-Read hazards.
+;; We do not do write scheduling with the arm core, so it is only necessary
+;; to model the first stage of each pipeline
+;; ??? Need to model LS pipeline properly for load/store multiple?
+;; We do not model fmstat properly.  This could be done by modeling pipelines
+;; properly and defining an absence set between a dummy fmstat unit and all
+;; other vfp units.
+
+(define_cpu_unit "fmac" "vfp11")
+
+(define_cpu_unit "ds" "vfp11")
+
+(define_cpu_unit "vfp_ls" "vfp11")
+
+(define_cpu_unit "fmstat" "vfp11")
+
+(exclusion_set "fmac,ds" "fmstat")
+
+(define_insn_reservation "vfp_ffarith" 4
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "fcpys,ffariths,ffarithd,fcmps,fcmpd"))
+ "fmac")
+
+(define_insn_reservation "vfp_farith" 8
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "fadds,faddd,fconsts,fconstd,f_cvt,fmuls,fmacs"))
+ "fmac")
+
+(define_insn_reservation "vfp_fmul" 9
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "fmuld,fmacd"))
+ "fmac*2")
+
+(define_insn_reservation "vfp_fdivs" 19
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "fdivs"))
+ "ds*15")
+
+(define_insn_reservation "vfp_fdivd" 33
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "fdivd"))
+ "fmac+ds*29")
+
+;; Moves to/from arm regs also use the load/store pipeline.
+(define_insn_reservation "vfp_fload" 4
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "f_loads,f_loadd,r_2_f"))
+ "vfp_ls")
+
+(define_insn_reservation "vfp_fstore" 4
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "f_stores,f_stored,f_2_r"))
+ "vfp_ls")
+
+(define_insn_reservation "vfp_to_cpsr" 4
+ (and (eq_attr "generic_vfp" "yes")
+      (eq_attr "type" "f_flag"))
+ "fmstat,vfp_ls*3")
+