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;; 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)")))
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