;; Constraint definitions for ATMEL AVR micro controllers. ;; Copyright (C) 2006 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 2, 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 COPYING. If not, write to ;; the Free Software Foundation, 51 Franklin Street, Fifth Floor, ;; Boston, MA 02110-1301, USA.

;; 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_memory_constraint “Q” “A memory address based on X or Y pointer with displacement.” (and (match_code “mem”) (match_test “extra_constraint_Q (op)”)))