1 ;;- Constraint definitions for the pdp11 for GNU C compiler
2 ;; Copyright (C) 2010-2013 Free Software Foundation, Inc.
3 ;; Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).
5 ;; This file is part of GCC.
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)
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.
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/>.
21 (define_register_constraint "f" "FPU_REGS"
24 (define_register_constraint "a" "LOAD_FPU_REGS"
25 "FPU register that can be directly loaded from memory")
27 (define_register_constraint "d" "MUL_REGS"
28 "General register that can be used for 16-bit multiply (odd numbered)")
30 (define_constraint "I"
31 "Integer constant that fits in 16 bits unsigned"
32 (and (match_code "const_int")
33 (match_test "(ival & 0xffff0000) == 0")))
35 (define_constraint "J"
36 "Integer constant whose low 16 bits are zero"
37 (and (match_code "const_int")
38 (match_test "(ival & 0xffff) == 0")))
40 (define_constraint "K"
41 "Integer constant whose lower and upper 16 bit half are both non-zero"
42 (and (match_code "const_int")
43 (match_test "(ival & 0xffff) != 0 && (ival & 0xffff0000) != 0")))
45 (define_constraint "L"
47 (and (match_code "const_int")
48 (match_test "ival == 1")))
50 (define_constraint "M"
52 (and (match_code "const_int")
53 (match_test "ival == -1")))
55 (define_constraint "N"
57 (and (match_code "const_int")
58 (match_test "ival == 0")))
60 (define_constraint "O"
61 "Integer constant for which several individual shifts are better than one big one"
62 (and (match_code "const_int")
63 (match_test "abs (ival) > 1 && abs (ival) <= 4")))
65 (define_constraint "G"
66 "Defines a real zero constant."
67 (and (match_code "const_double")
68 (match_test "op == CONST0_RTX (GET_MODE (op))")))
70 (define_constraint "Q"
71 "Memory reference that requires an additional word after the opcode"
72 (and (match_code "mem")
73 (match_test "memory_address_p (GET_MODE (op), XEXP (op, 0))
74 && !simple_memory_operand (op, GET_MODE (op))")))
76 (define_constraint "R"
77 "Memory reference that is encoded within the opcode"
78 (and (match_code "mem")
79 (match_test "memory_address_p (GET_MODE (op), XEXP (op, 0))
80 && simple_memory_operand (op, GET_MODE (op))")))