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d34b0d1e | 1 | ;; Constraint definitions for Xilinx MicroBlaze processors. |
fbd26352 | 2 | ;; Copyright (C) 2010-2019 Free Software Foundation, Inc. |
d34b0d1e | 3 | |
4 | ;; Contributed by Michael Eager <eager@eagercon.com>. | |
5 | ||
6 | ;; This file is part of GCC. | |
7 | ||
8 | ;; GCC is free software; you can redistribute it and/or modify | |
9 | ;; it under the terms of the GNU General Public License as published by | |
10 | ;; the Free Software Foundation; either version 3, or (at your option) | |
11 | ;; any later version. | |
12 | ||
13 | ;; GCC is distributed in the hope that it will be useful, | |
14 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ;; GNU General Public License for more details. | |
17 | ||
18 | ;; You should have received a copy of the GNU General Public License | |
19 | ;; along with GCC; see the file COPYING3. If not see | |
20 | ;; <http://www.gnu.org/licenses/>. | |
21 | ||
22 | (define_register_constraint "d" "GR_REGS" | |
23 | "A general register.") | |
24 | ||
25 | (define_register_constraint "z" "ST_REGS" | |
26 | "A status register.") | |
27 | ||
28 | ;; Define integer constraints | |
29 | ||
30 | (define_constraint "I" | |
31 | "A signed 16-bit constant." | |
32 | (and (match_code "const_int") | |
33 | (match_test "SMALL_OPERAND (ival)"))) | |
34 | ||
35 | (define_constraint "J" | |
36 | "Integer zero." | |
37 | (and (match_code "const_int") | |
38 | (match_test "ival == 0"))) | |
39 | ||
40 | (define_constraint "M" | |
41 | "A constant which needs two instructions to load." | |
42 | (and (match_code "const_int") | |
43 | (match_test "LARGE_OPERAND (ival)"))) | |
44 | ||
45 | (define_constraint "N" | |
46 | "A constant in the range -65535 to -1 (inclusive)." | |
47 | (and (match_code "const_int") | |
48 | (match_test "(unsigned HOST_WIDE_INT) (ival + 0xffff) < 0xffff"))) | |
49 | ||
50 | (define_constraint "P" | |
51 | "A constant in the range 1 to 65535 (inclusive)." | |
52 | (and (match_code "const_int") | |
53 | (match_test "ival > 0 && ival < 0x10000"))) | |
54 | ||
55 | ;; Define floating point constraints | |
56 | ||
57 | (define_constraint "G" | |
58 | "Floating-point zero." | |
59 | (and (match_code "const_double") | |
60 | (match_test "op == CONST0_RTX (mode)"))) | |
61 | ||
62 | ;; Define memory constraints | |
63 | ||
64 | (define_memory_constraint "R" | |
65 | "Memory operand which fits in single instruction." | |
66 | (and (match_code "mem") | |
67 | (match_test "simple_memory_operand (op, GET_MODE (op))"))) | |
68 | ||
69 | (define_memory_constraint "T" | |
70 | "Double word operand." | |
71 | (and (match_code "mem") | |
72 | (match_test "double_memory_operand (op, GET_MODE (op))"))) | |
c4fcbf4c | 73 | |
74 | (define_memory_constraint "Q" | |
75 | "Memory operand which is a single register." | |
76 | (and (match_code "mem") | |
77 | (match_test "GET_CODE ( XEXP (op, 0)) == REG"))) |