obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 177 insertions, 0 deletions

diff --git a/gcc/config/alpha/ev6.md b/gcc/config/alpha/ev6.md
new file mode 100644
index 000000000..adfe504bf
--- /dev/null
+++ b/gcc/config/alpha/ev6.md
@@ -0,0 +1,177 @@
+;; Scheduling description for Alpha EV6.
+;;   Copyright (C) 2002, 2004, 2005, 2007 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 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/>.
+
+; EV6 can issue 4 insns per clock.  It's out-of-order, so this isn't
+; expected to help over-much, but a precise description can be important
+; for software pipelining.
+;
+; EV6 has two symmetric pairs ("clusters") of two asymmetric integer
+; units ("upper" and "lower"), yielding pipe names U0, U1, L0, L1.
+;
+; ??? The clusters have independent register files that are re-synced
+; every cycle.  Thus there is one additional cycle of latency between
+; insns issued on different clusters.  Possibly model that by duplicating
+; all EBOX insn_reservations that can issue to either cluster, increasing
+; all latencies by one, and adding bypasses within the cluster.
+;
+; ??? In addition, instruction order affects cluster issue.
+
+(define_automaton "ev6_0,ev6_1")
+(define_cpu_unit "ev6_u0,ev6_u1,ev6_l0,ev6_l1" "ev6_0")
+(define_reservation "ev6_u" "ev6_u0|ev6_u1")
+(define_reservation "ev6_l" "ev6_l0|ev6_l1")
+(define_reservation "ev6_ebox" "ev6_u|ev6_l")
+
+(define_cpu_unit "ev6_fa" "ev6_1")
+(define_cpu_unit "ev6_fm,ev6_fst0,ev6_fst1" "ev6_0")
+(define_reservation "ev6_fst" "ev6_fst0|ev6_fst1")
+
+; Assume type "multi" single issues.
+(define_insn_reservation "ev6_multi" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "multi"))
+  "ev6_u0+ev6_u1+ev6_l0+ev6_l1+ev6_fa+ev6_fm+ev6_fst0+ev6_fst1")
+
+; Integer loads take at least 3 clocks, and only issue to lower units.
+; adjust_cost still factors in user-specified memory latency, so return 1 here.
+(define_insn_reservation "ev6_ild" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "ild,ldsym,ld_l"))
+  "ev6_l")
+
+(define_insn_reservation "ev6_ist" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "ist,st_c"))
+  "ev6_l")
+
+(define_insn_reservation "ev6_mb" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "mb"))
+  "ev6_l1")
+
+; FP loads take at least 4 clocks.  adjust_cost still factors
+; in user-specified memory latency, so return 2 here.
+(define_insn_reservation "ev6_fld" 2
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "fld"))
+  "ev6_l")
+
+; The FPU communicates with memory and the integer register file
+; via two fp store units.  We need a slot in the fst immediately, and
+; a slot in LOW after the operand data is ready.  At which point the
+; data may be moved either to the store queue or the integer register
+; file and the insn retired.
+
+(define_insn_reservation "ev6_fst" 3
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "fst"))
+  "ev6_fst,nothing,ev6_l")
+
+; Arithmetic goes anywhere.
+(define_insn_reservation "ev6_arith" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "iadd,ilog,icmp"))
+  "ev6_ebox")
+
+; Motion video insns also issue only to U0, and take three ticks.
+(define_insn_reservation "ev6_mvi" 3
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "mvi"))
+  "ev6_u0")
+
+; Shifts issue to upper units.
+(define_insn_reservation "ev6_shift" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "shift"))
+  "ev6_u")
+
+; Multiplies issue only to U1, and all take 7 ticks.
+(define_insn_reservation "ev6_imul" 7
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "imul"))
+  "ev6_u1")
+
+; Conditional moves decompose into two independent primitives, each taking
+; one cycle.  Since ev6 is out-of-order, we can't see anything but two cycles.
+(define_insn_reservation "ev6_icmov" 2
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "icmov"))
+  "ev6_ebox,ev6_ebox")
+
+; Integer branches issue to upper units
+(define_insn_reservation "ev6_ibr" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "ibr,callpal"))
+  "ev6_u")
+
+; Calls only issue to L0.
+(define_insn_reservation "ev6_jsr" 1
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "jsr"))
+  "ev6_l0")
+
+; Ftoi/itof only issue to lower pipes.
+(define_insn_reservation "ev6_itof" 3
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "itof"))
+  "ev6_l")
+
+(define_insn_reservation "ev6_ftoi" 3
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "ftoi"))
+  "ev6_fst,nothing,ev6_l")
+
+(define_insn_reservation "ev6_fmul" 4
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "fmul"))
+  "ev6_fm")
+
+(define_insn_reservation "ev6_fadd" 4
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "fadd,fcpys,fbr"))
+  "ev6_fa")
+
+(define_insn_reservation "ev6_fcmov" 8
+  (and (eq_attr "tune" "ev6")
+       (eq_attr "type" "fcmov"))
+  "ev6_fa,nothing*3,ev6_fa")
+
+(define_insn_reservation "ev6_fdivsf" 12
+  (and (eq_attr "tune" "ev6")
+       (and (eq_attr "type" "fdiv")
+	    (eq_attr "opsize" "si")))
+  "ev6_fa*9")
+
+(define_insn_reservation "ev6_fdivdf" 15
+  (and (eq_attr "tune" "ev6")
+       (and (eq_attr "type" "fdiv")
+	    (eq_attr "opsize" "di")))
+  "ev6_fa*12")
+
+(define_insn_reservation "ev6_sqrtsf" 18
+  (and (eq_attr "tune" "ev6")
+       (and (eq_attr "type" "fsqrt")
+	    (eq_attr "opsize" "si")))
+  "ev6_fa*15")
+
+(define_insn_reservation "ev6_sqrtdf" 33
+  (and (eq_attr "tune" "ev6")
+       (and (eq_attr "type" "fsqrt")
+	    (eq_attr "opsize" "di")))
+  "ev6_fa*30")