;;- Constraint definitions for the pdp11 for GNU C compiler ;; Copyright (C) 2010-2018 Free Software Foundation, Inc. ;; Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).

;; 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/.

(define_register_constraint “f” “FPU_REGS” “Any FPU register”)

(define_register_constraint “a” “LOAD_FPU_REGS” “FPU register that can be directly loaded from memory”)

(define_register_constraint “d” “MUL_REGS” “General register that can be used for 16-bit multiply (odd numbered)”)

(define_constraint “I” “Integer constant that fits in 16 bits unsigned” (and (match_code “const_int”) (match_test “(ival & 0xffff0000) == 0”)))

(define_constraint “J” “Integer constant whose low 16 bits are zero” (and (match_code “const_int”) (match_test “(ival & 0xffff) == 0”)))

(define_constraint “K” “Integer constant whose lower and upper 16 bit half are both non-zero” (and (match_code “const_int”) (match_test “(ival & 0xffff) != 0 && (ival & 0xffff0000) != 0”)))

(define_constraint “L” “Integer constant 1” (and (match_code “const_int”) (match_test “ival == 1”)))

(define_constraint “M” “Integer constant -1” (and (match_code “const_int”) (match_test “ival == -1”)))

(define_constraint “N” “Integer constant 0” (and (match_code “const_int”) (match_test “ival == 0”)))

(define_constraint “O” “Integer constant for which several individual shifts are better than one big one” (and (match_code “const_int”) (match_test “abs (ival) > 1 && abs (ival) <= 4”)))

(define_constraint “G” “Defines a real zero constant.” (and (match_code “const_double”) (match_test “op == CONST0_RTX (GET_MODE (op))”)))

(define_constraint “Q” “Memory reference that requires an additional word after the opcode” (and (match_code “mem”) (match_test “memory_address_p (GET_MODE (op), XEXP (op, 0)) && !simple_memory_operand (op, GET_MODE (op))”)))

(define_constraint “R” “Memory reference that is encoded within the opcode” (and (match_code “mem”) (match_test “memory_address_p (GET_MODE (op), XEXP (op, 0)) && simple_memory_operand (op, GET_MODE (op))”)))