Imported gcc-4.4.3

[msp430-gcc.git] / gcc / config / avr / constraints.md

diff --git a/gcc/config/avr/constraints.md b/gcc/config/avr/constraints.md
new file mode 100644 (file)
index 0000000..2ac8833
--- /dev/null
+++ b/gcc/config/avr/constraints.md
@@ -0,0 +1,109 @@
+;; Constraint definitions for ATMEL AVR micro controllers.
+;; 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/>.
+
+;; Register constraints
+
+(define_register_constraint "t" "R0_REG"
+  "Temporary register r0")
+
+(define_register_constraint "b" "BASE_POINTER_REGS"
+  "Base pointer registers (r28--r31)")
+
+(define_register_constraint "e" "POINTER_REGS"
+  "Pointer registers (r26--r31)")
+
+(define_register_constraint "w" "ADDW_REGS"
+  "Registers from r24 to r31.  These registers
+   can be used in @samp{adiw} command.")
+
+(define_register_constraint "d" "LD_REGS"
+  "Registers from r16 to r31.")
+
+(define_register_constraint "l" "NO_LD_REGS"
+  "Registers from r0 to r15.")
+
+(define_register_constraint "a" "SIMPLE_LD_REGS"
+  "Registers from r16 to r23.")
+
+(define_register_constraint "x" "POINTER_X_REGS"
+  "Register pair X (r27:r26).")
+
+(define_register_constraint "y" "POINTER_Y_REGS"
+  "Register pair Y (r29:r28).")
+
+(define_register_constraint "z" "POINTER_Z_REGS"
+  "Register pair Z (r31:r30).")
+
+(define_register_constraint "q" "STACK_REG"
+  "Stack pointer register (SPH:SPL).")
+
+(define_constraint "I"
+  "Integer constant in the range 0 @dots{} 63."
+  (and (match_code "const_int")
+       (match_test "ival >= 0 && ival <= 63")))
+
+(define_constraint "J"
+  "Integer constant in the range -63 @dots{} 0."
+  (and (match_code "const_int")
+       (match_test "ival <= 0 && ival >= -63")))
+
+(define_constraint "K"
+  "Integer constant 2."
+  (and (match_code "const_int")
+       (match_test "ival == 2")))
+
+(define_constraint "L"
+  "Zero."
+  (and (match_code "const_int")
+       (match_test "ival == 0")))
+
+(define_constraint "M"
+  "Integer constant in the range 0 @dots{} 0xff."
+  (and (match_code "const_int")
+       (match_test "ival >= 0 && ival <= 0xff")))
+
+(define_constraint "N"
+  "Constant integer @minus{}1."
+  (and (match_code "const_int")
+       (match_test "ival == -1")))
+
+(define_constraint "O"
+  "Constant integer 8, 16, or 24."
+  (and (match_code "const_int")
+       (match_test "ival == 8 || ival == 16 || ival == 24")))
+
+(define_constraint "P"
+  "Constant integer 1."
+  (and (match_code "const_int")
+       (match_test "ival == 1")))
+
+(define_constraint "G"
+  "Constant float 0."
+  (and (match_code "const_double")
+       (match_test "op == CONST0_RTX (SFmode)")))
+
+(define_constraint "R"
+  "Integer constant in the range -6 @dots{} 5."
+  (and (match_code "const_int")
+       (match_test "ival >= -6 && ival <= 5")))
+       
+(define_memory_constraint "Q"
+  "A memory address based on Y or Z pointer with displacement."
+  (and (match_code "mem")
+       (match_test "extra_constraint_Q (op)")))