1;;- Predicate definitions for the pdp11 for GNU C compiler
2;; Copyright (C) 1994-2020 Free Software Foundation, Inc.
3;; Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).
4
5;; This file is part of GCC.
6
7;; GCC is free software; you can redistribute it and/or modify
8;; it under the terms of the GNU General Public License as published by
9;; the Free Software Foundation; either version 3, or (at your option)
10;; any later version.
11
12;; GCC is distributed in the hope that it will be useful,
13;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15;; GNU General Public License for more details.
16
17;; You should have received a copy of the GNU General Public License
18;; along with GCC; see the file COPYING3.  If not see
19;; <http://www.gnu.org/licenses/>.
20
21;; Match CONST_DOUBLE zero for tstd/tstf.
22(define_predicate "register_or_const0_operand"
23  (ior (match_operand 0 "register_operand")
24       (match_test "op == CONST0_RTX (GET_MODE (op))")))
25
26;; Accept integer arguments in the range 1..3, which are the
27;; shift counts for which we unroll a shift.  This matches the rule for
28;; the "O" constraint.
29(define_predicate "expand_shift_operand"
30  (and (match_code "const_int")
31       (match_test "(unsigned) INTVAL (op) < 4")))
32
33;; Accept integer arguments +1 and -1, for which add and sub can be
34;; done as inc or dec instructions.  This matches the rule for the
35;; L and M constraints.
36(define_predicate "incdec_operand"
37  (and (match_code "const_int")
38       (ior (match_test "INTVAL (op) == -1")
39	    (match_test "INTVAL (op) == 1"))))
40
41;; Accept anything general_operand accepts, except that registers must
42;; be FPU registers.
43(define_predicate "float_operand"
44  (if_then_else (match_code "reg")
45		(ior
46		 (match_test "REGNO_REG_CLASS (REGNO (op)) == LOAD_FPU_REGS")
47		 (match_test "REGNO_REG_CLASS (REGNO (op)) == NO_LOAD_FPU_REGS"))
48		(match_operand 0 "general_operand")))
49
50;; Accept anything nonimmediate_operand accepts, except that registers must
51;; be FPU registers.
52(define_predicate "float_nonimm_operand"
53  (if_then_else (match_code "reg")
54		(ior
55		 (match_test "REGNO_REG_CLASS (REGNO (op)) == LOAD_FPU_REGS")
56		 (match_test "REGNO_REG_CLASS (REGNO (op)) == NO_LOAD_FPU_REGS"))
57		(match_operand 0 "nonimmediate_operand")))
58
59;; Accept any comparison valid for CCNZmode
60(define_predicate "ccnz_operator"
61  (match_code "eq,ne,ge,lt"))
62