--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/i386/constraints.md	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,168 @@
+;; Constraint definitions for IA-32 and x86-64.
+;; Copyright (C) 2006, 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/>.
+
+;;; Unused letters:
+;;;     B     H           TU W
+;;;           h jk          vw  z
+
+;; Integer register constraints.
+;; It is not necessary to define 'r' here.
+(define_register_constraint "R" "LEGACY_REGS"
+ "Legacy register---the eight integer registers available on all
+  i386 processors (@code{a}, @code{b}, @code{c}, @code{d},
+  @code{si}, @code{di}, @code{bp}, @code{sp}).")
+
+(define_register_constraint "q" "TARGET_64BIT ? GENERAL_REGS : Q_REGS"
+ "Any register accessible as @code{@var{r}l}.  In 32-bit mode, @code{a},
+  @code{b}, @code{c}, and @code{d}; in 64-bit mode, any integer register.")
+
+(define_register_constraint "Q" "Q_REGS"
+ "Any register accessible as @code{@var{r}h}: @code{a}, @code{b},
+  @code{c}, and @code{d}.")
+
+(define_register_constraint "l" "INDEX_REGS"
+ "@internal Any register that can be used as the index in a base+index
+  memory access: that is, any general register except the stack pointer.")
+
+(define_register_constraint "a" "AREG"
+ "The @code{a} register.")
+
+(define_register_constraint "b" "BREG"
+ "The @code{b} register.")
+
+(define_register_constraint "c" "CREG"
+ "The @code{c} register.")
+
+(define_register_constraint "d" "DREG"
+ "The @code{d} register.")
+
+(define_register_constraint "S" "SIREG"
+ "The @code{si} register.")
+
+(define_register_constraint "D" "DIREG"
+ "The @code{di} register.")
+
+(define_register_constraint "A" "AD_REGS"
+ "The @code{a} and @code{d} registers, as a pair (for instructions
+  that return half the result in one and half in the other).")
+
+;; Floating-point register constraints.
+(define_register_constraint "f"
+ "TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 ? FLOAT_REGS : NO_REGS"
+ "Any 80387 floating-point (stack) register.")
+
+(define_register_constraint "t"
+ "TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 ? FP_TOP_REG : NO_REGS"
+ "Top of 80387 floating-point stack (@code{%st(0)}).")
+
+(define_register_constraint "u"
+ "TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 ? FP_SECOND_REG : NO_REGS"
+ "Second from top of 80387 floating-point stack (@code{%st(1)}).")
+
+;; Vector registers (also used for plain floating point nowadays).
+(define_register_constraint "y" "TARGET_MMX ? MMX_REGS : NO_REGS"
+ "Any MMX register.")
+
+(define_register_constraint "x" "TARGET_SSE ? SSE_REGS : NO_REGS"
+ "Any SSE register.")
+
+;; We use the Y prefix to denote any number of conditional register sets:
+;;  z	First SSE register.
+;;  2	SSE2 enabled
+;;  i	SSE2 inter-unit moves enabled
+;;  m	MMX inter-unit moves enabled
+
+(define_register_constraint "Yz" "TARGET_SSE ? SSE_FIRST_REG : NO_REGS"
+ "First SSE register (@code{%xmm0}).")
+
+(define_register_constraint "Y2" "TARGET_SSE2 ? SSE_REGS : NO_REGS"
+ "@internal Any SSE register, when SSE2 is enabled.")
+
+(define_register_constraint "Yi"
+ "TARGET_SSE2 && TARGET_INTER_UNIT_MOVES ? SSE_REGS : NO_REGS"
+ "@internal Any SSE register, when SSE2 and inter-unit moves are enabled.")
+
+(define_register_constraint "Ym"
+ "TARGET_MMX && TARGET_INTER_UNIT_MOVES ? MMX_REGS : NO_REGS"
+ "@internal Any MMX register, when inter-unit moves are enabled.")
+
+;; Integer constant constraints.
+(define_constraint "I"
+  "Integer constant in the range 0 @dots{} 31, for 32-bit shifts."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 31)")))
+
+(define_constraint "J"
+  "Integer constant in the range 0 @dots{} 63, for 64-bit shifts."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 63)")))
+
+(define_constraint "K"
+  "Signed 8-bit integer constant."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, -128, 127)")))
+
+(define_constraint "L"
+  "@code{0xFF} or @code{0xFFFF}, for andsi as a zero-extending move."
+  (and (match_code "const_int")
+       (match_test "ival == 0xFF || ival == 0xFFFF")))
+
+(define_constraint "M"
+  "0, 1, 2, or 3 (shifts for the @code{lea} instruction)."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 3)")))
+
+(define_constraint "N"
+  "Unsigned 8-bit integer constant (for @code{in} and @code{out}
+   instructions)."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 255)")))
+
+(define_constraint "O"
+  "@internal Integer constant in the range 0 @dots{} 127, for 128-bit shifts."
+  (and (match_code "const_int")
+       (match_test "IN_RANGE (ival, 0, 127)")))
+
+;; Floating-point constant constraints.
+;; We allow constants even if TARGET_80387 isn't set, because the
+;; stack register converter may need to load 0.0 into the function
+;; value register (top of stack).
+(define_constraint "G"
+  "Standard 80387 floating point constant."
+  (and (match_code "const_double")
+       (match_test "standard_80387_constant_p (op)")))
+
+;; This can theoretically be any mode's CONST0_RTX.
+(define_constraint "C"
+  "Standard SSE floating point constant."
+  (match_test "standard_sse_constant_p (op)"))
+
+;; Constant-or-symbol-reference constraints.
+
+(define_constraint "e"
+  "32-bit signed integer constant, or a symbolic reference known
+   to fit that range (for immediate operands in sign-extending x86-64
+   instructions)."
+  (match_operand 0 "x86_64_immediate_operand"))
+
+(define_constraint "Z"
+  "32-bit unsigned integer constant, or a symbolic reference known
+   to fit that range (for immediate operands in zero-extending x86-64
+   instructions)."
+  (match_operand 0 "x86_64_zext_immediate_operand"))