[gcc] GCC 4.5.0=>4.5.1

gcc/gcc/config/rs6000/constraints.md

Index: gcc/gcc/config/rs6000/constraints.md
diff --git a/gcc/gcc/config/rs6000/constraints.md b/gcc/gcc/config/rs6000/constraints.md
index 7f551994b7d8daa7fa9ff95c843fc24116d343c8..7b99094d738561c79488ec7e4cb78b4d941f0cd7 100644
--- a/gcc/gcc/config/rs6000/constraints.md
+++ b/gcc/gcc/config/rs6000/constraints.md
@@ -1,5 +1,5 @@
 ;; Constraint definitions for RS6000
-;; Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+;; Copyright (C) 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
 ;;
 ;; This file is part of GCC.
 ;;
@@ -17,10 +17,14 @@
 ;; along with GCC; see the file COPYING3.  If not see
 ;; <http://www.gnu.org/licenses/>.
 
+;; Available constraint letters: "e", "k", "u", "A", "B", "C", "D"
+
 ;; Register constraints
 
-(define_register_constraint "f" "TARGET_HARD_FLOAT && TARGET_FPRS
-			 	 ? FLOAT_REGS : NO_REGS"
+(define_register_constraint "f" "rs6000_constraints[RS6000_CONSTRAINT_f]"
+  "@internal")
+
+(define_register_constraint "d" "rs6000_constraints[RS6000_CONSTRAINT_d]"
   "@internal")
 
 (define_register_constraint "b" "BASE_REGS"
@@ -50,6 +54,28 @@
 (define_register_constraint "z" "XER_REGS"
   "@internal")
 
+;; Use w as a prefix to add VSX modes
+;; vector double (V2DF)
+(define_register_constraint "wd" "rs6000_constraints[RS6000_CONSTRAINT_wd]"
+  "@internal")
+
+;; vector float (V4SF)
+(define_register_constraint "wf" "rs6000_constraints[RS6000_CONSTRAINT_wf]"
+  "@internal")
+
+;; scalar double (DF)
+(define_register_constraint "ws" "rs6000_constraints[RS6000_CONSTRAINT_ws]"
+  "@internal")
+
+;; any VSX register
+(define_register_constraint "wa" "rs6000_constraints[RS6000_CONSTRAINT_wa]"
+  "@internal")
+
+;; Altivec style load/store that ignores the bottom bits of the address
+(define_memory_constraint "wZ"
+  "Indexed or indirect memory operand, ignoring the bottom 4 bits"
+  (match_operand 0 "altivec_indexed_or_indirect_operand"))
+
 ;; Integer constraints
 
 (define_constraint "I"
@@ -109,8 +135,17 @@
 
 ;; Memory constraints
 
+(define_memory_constraint "es"
+  "A ``stable'' memory operand; that is, one which does not include any
+automodification of the base register.  Unlike @samp{m}, this constraint
+can be used in @code{asm} statements that might access the operand
+several times, or that might not access it at all."
+  (and (match_code "mem")
+       (match_test "GET_RTX_CLASS (GET_CODE (XEXP (op, 0))) != RTX_AUTOINC")))
+
 (define_memory_constraint "Q"
-  "Memory operand that is just an offset from a reg"
+  "Memory operand that is an offset from a register (it is usually better
+to use @samp{m} or @samp{es} in @code{asm} statements)"
   (and (match_code "mem")
        (match_test "GET_CODE (XEXP (op, 0)) == REG")))
 
@@ -119,7 +154,8 @@
   (match_operand 0 "word_offset_memref_operand"))
 
 (define_memory_constraint "Z"
-  "Indexed or indirect memory operand"
+  "Memory operand that is an indexed or indirect from a register (it is
+usually better to use @samp{m} or @samp{es} in @code{asm} statements)"
   (match_operand 0 "indexed_or_indirect_operand"))
 
 ;; Address constraints
@@ -159,3 +195,7 @@
 (define_constraint "W"
   "vector constant that does not require memory"
   (match_operand 0 "easy_vector_constant"))
+
+(define_constraint "j"
+  "Zero vector constant"
+  (match_test "(op == const0_rtx || op == CONST0_RTX (GET_MODE (op)))"))