1;; Constraint definitions for the Motorola MCore
2;; Copyright (C) 2011-2020 Free Software Foundation, Inc.
3
4;; This file is part of GCC.
5
6;; GCC is free software; you can redistribute it and/or modify
7;; it under the terms of the GNU General Public License as published by
8;; the Free Software Foundation; either version 3, or (at your option)
9;; any later version.
10
11;; GCC is distributed in the hope that it will be useful,
12;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;; GNU General Public License for more details.
15
16;; You should have received a copy of the GNU General Public License
17;; along with GCC; see the file COPYING3.  If not see
18;; <http://www.gnu.org/licenses/>.
19
20;; Register constraints.
21(define_register_constraint "a" "LRW_REGS"
22  "@internal")
23
24(define_register_constraint "b" "ONLYR1_REGS"
25  "@internal")
26
27(define_register_constraint "c" "C_REGS"
28  "@internal")
29
30(define_register_constraint "x" "ALL_REGS"
31  "@internal")
32
33;; Integer constraints.
34(define_constraint "I"
35  "An integer in the range 0 to 127."
36  (and (match_code "const_int")
37       (match_test "IN_RANGE (ival, 0, 127)")))
38
39(define_constraint "J"
40  "An integer in the range 1 to 32."
41  (and (match_code "const_int")
42       (match_test "IN_RANGE (ival, 1, 32)")))
43
44(define_constraint "K"
45  "A shift operand, an integer in the range 0 to 31."
46  (and (match_code "const_int")
47       (match_test "IN_RANGE (ival, 0, 31)")))
48
49(define_constraint "L"
50  "A negative arithmetic operand in the range -32 to -1."
51  (and (match_code "const_int")
52       (match_test "IN_RANGE (ival, -32, -1)")))
53
54(define_constraint "M"
55  "A constant loadable by bgeni."
56  (and (match_code "const_int")
57       (match_test "exact_log2 (ival) >= 0 && exact_log2 (ival) <= 30")))
58
59(define_constraint "N"
60  "A constant loadable by bmaskii, including -1."
61  (and (match_code "const_int")
62       (ior (match_test "ival == -1")
63	    (and (match_test "exact_log2 (ival + 1) >= 0")
64		 (match_test "exact_log2 (ival + 1) <= 30")))))
65
66(define_constraint "O"
67  "A constant allowed by cmov with two constants +/- 1 of each other."
68  (and (match_code "const_int")
69       (ior (match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")
70	    (match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_M)")
71	    (match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_N)")
72	    (match_test "insn_const_int_ok_for_constraint (ival - 1, CONSTRAINT_M)")
73	    (match_test "insn_const_int_ok_for_constraint (ival + 1, CONSTRAINT_N)"))))
74
75(define_constraint "P"
76  "A value that can be generated without an lrw instruction."
77  (and (match_code "const_int")
78       (match_test "mcore_const_ok_for_inline (ival)")))
79
80;; Floating-point constraints.
81(define_constraint "G"
82  "@internal"
83  (and (match_code "const_double")
84       (match_test "insn_const_int_ok_for_constraint (hval, CONSTRAINT_I)")
85       (match_test "insn_const_int_ok_for_constraint (ival, CONSTRAINT_I)")))
86
87;; Other constraints.
88(define_constraint "Q"
89  "The integer constant one."
90  (and (match_code "const_int")
91       (match_test "ival == 1")))
92
93(define_constraint "R"
94  "@internal"
95  (and (match_code "mem")
96       (match_test "GET_CODE (XEXP (op, 0)) == LABEL_REF")))
97
98(define_constraint "S"
99  "An integer constant with 0, 1, or 2 bits clear."
100  (and (match_code "const_int")
101       (match_test "mcore_num_zeros (ival) <= 2")))
102
103(define_constraint "T"
104  "An integer constant with 2 set bits."
105  (and (match_code "const_int")
106       (match_test "mcore_num_ones (ival) == 2")))
107
108(define_constraint "U"
109  "The integer constant zero."
110  (and (match_code "const_int")
111       (match_test "ival == 0")))
112