;;- Predicate definitions for the pdp11 for GNU C compiler
;; Copyright (C) 1994-2024 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/>.

;; Match CONST_DOUBLE zero for tstd/tstf.
(define_predicate "register_or_const0_operand"
  (ior (match_operand 0 "register_operand")
       (match_test "op == CONST0_RTX (GET_MODE (op))")))

;; Accept integer arguments in the range 1..3, which are the
;; shift counts for which we unroll a shift.  This matches the rule for
;; the "O" constraint.
(define_predicate "expand_shift_operand"
  (and (match_code "const_int")
       (match_test "(unsigned) INTVAL (op) < 4")))

;; Accept integer arguments +1 and -1, for which add and sub can be
;; done as inc or dec instructions.  This matches the rule for the
;; L and M constraints.
(define_predicate "incdec_operand"
  (and (match_code "const_int")
       (ior (match_test "INTVAL (op) == -1")
	    (match_test "INTVAL (op) == 1"))))

;; Accept anything general_operand accepts, except that registers must
;; be FPU registers.
(define_predicate "float_operand"
  (if_then_else (match_code "reg")
		(ior 
		 (match_test "REGNO_REG_CLASS (REGNO (op)) == LOAD_FPU_REGS")
		 (match_test "REGNO_REG_CLASS (REGNO (op)) == NO_LOAD_FPU_REGS"))
		(match_operand 0 "general_operand")))

;; Accept anything nonimmediate_operand accepts, except that registers must
;; be FPU registers.
(define_predicate "float_nonimm_operand"
  (if_then_else (match_code "reg")
		(ior 
		 (match_test "REGNO_REG_CLASS (REGNO (op)) == LOAD_FPU_REGS")
		 (match_test "REGNO_REG_CLASS (REGNO (op)) == NO_LOAD_FPU_REGS"))
		(match_operand 0 "nonimmediate_operand")))

;; Accept any comparison valid for CCNZmode
(define_predicate "ccnz_operator"
  (match_code "eq,ne,ge,lt"))
