1;; Constraint definitions for DEC Alpha.
2;; Copyright (C) 2007-2021 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;;; Unused letters:
21;;;    ABCDEF H             V  YZ
22;;;       de ghijkl   pq  tu wxyz
23
24;; Integer register constraints.
25
26(define_register_constraint "a" "R24_REG"
27 "General register 24, input to division routine")
28
29(define_register_constraint "b" "R25_REG"
30 "General register 24, input to division routine")
31
32(define_register_constraint "c" "R27_REG"
33 "General register 27, function call address")
34
35(define_register_constraint "f" "TARGET_FPREGS ? FLOAT_REGS : NO_REGS"
36 "Any floating-point register")
37
38(define_register_constraint "v" "R0_REG"
39 "General register 0, function value return address")
40
41(define_memory_constraint "w"
42 "A memory whose address is only a register"
43 (match_operand 0 "mem_noofs_operand"))
44
45;; Integer constant constraints.
46(define_constraint "I"
47  "An unsigned 8 bit constant"
48  (and (match_code "const_int")
49       (match_test "IN_RANGE (ival, 0, 255)")))
50
51(define_constraint "J"
52  "The constant zero"
53  (and (match_code "const_int")
54       (match_test "ival == 0")))
55
56(define_constraint "K"
57  "Signed 16-bit integer constant"
58  (and (match_code "const_int")
59       (match_test "IN_RANGE (ival, -32768, 32767)")))
60
61(define_constraint "L"
62  "A shifted signed 16-bit constant appropriate for LDAH"
63  (and (match_code "const_int")
64       (match_test "(ival & 0xffff) == 0
65		    && (ival >> 31 == -1 || ival >> 31 == 0)")))
66
67(define_constraint "M"
68  "A valid operand of a ZAP insn"
69  (and (match_code "const_int")
70       (match_test "zap_mask (ival) != 0")))
71
72(define_constraint "N"
73  "A complemented unsigned 8-bit constant"
74  (and (match_code "const_int")
75       (match_test "IN_RANGE (~ival, 0, 255)")))
76
77(define_constraint "O"
78  "A negated unsigned 8-bit constant"
79  (and (match_code "const_int")
80       (match_test "IN_RANGE (-ival, 0, 255)")))
81
82(define_constraint "P"
83  "The constant 1, 2 or 3"
84  (and (match_code "const_int")
85       (match_test "IN_RANGE (ival, 1, 3)")))
86
87;; Floating-point constant constraints.
88(define_constraint "G"
89  "The floating point zero constant"
90  (and (match_code "const_double")
91       (match_test "op == CONST0_RTX (mode)")))
92
93;; "Extra" constraints.
94
95;; A memory location that is not a reference
96;; (using an AND) to an unaligned location.
97(define_memory_constraint "Q"
98  "@internal A normal_memory_operand"
99  (and (match_code "mem")
100       (not (match_code "and" "0"))))
101
102(define_constraint "R"
103  "@internal A direct_call_operand"
104  (match_operand:DI 0 "direct_call_operand"))
105
106(define_constraint "S"
107  "An unsigned 6-bit constant"
108  (and (match_code "const_int")
109       (match_test "IN_RANGE (ival, 0, 63)")))
110
111(define_constraint "T"
112  "@internal A high-part symbol"
113  (match_code "high"))
114
115(define_constraint "W"
116  "A vector zero constant"
117  (and (match_code "const_vector")
118       (match_test "op == CONST0_RTX (mode)")))
119