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;;- Constraint definitions for the pdp11 for GNU C compiler
;; Copyright (C) 2010 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))")))
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