Imported gcc-4.4.3

[msp430-gcc.git] / gcc / config / picochip / dfa_space.md

diff --git a/gcc/config/picochip/dfa_space.md b/gcc/config/picochip/dfa_space.md
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+++ b/gcc/config/picochip/dfa_space.md
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+;; GCC machine description for picochip
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;; Contributed by picoChip Designs Ltd (http://www.picochip.com)
+;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan
+;; Sandanagobalane (hariharan@picochip.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
+;; <http://www.gnu.org/licenses/>.
+
+;; The following DFA description schedules instructions for space.  The
+;; schedule seeks to avoid stall cycles (e.g., memory load), but the
+;; instructions are not VLIW packed (whenever instructions are packed
+;; together, an additional byte is used to denote this, which
+;; increases the code size).
+
+;; No special handling of the long constants is necessary (as in
+;; dfa_speed.md), since VLIW packing is not used.
+
+;; Memory instructions stall for one cycle.  All other instructions
+;; complete ready for the next cycle.
+
+(define_insn_reservation "nonStallInsn" 1
+  (and (eq_attr "schedType" "space")
+       (eq_attr "type" "!mem"))
+  "slot0+slot1+slot2")
+
+(define_insn_reservation "stallInsn" 2
+  (and (eq_attr "schedType" "space")
+       (eq_attr "type" "mem"))
+  "slot0+slot1+slot2")