Mercurial > hg > CbC > CbC_gcc

comparison gcc/config/rs6000/constraints.md @ 0:a06113de4d67

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children 77e2b8dfacca
comparison
equal deleted inserted replaced
-1:000000000000 0:a06113de4d67
1 ;; Constraint definitions for RS6000
2 ;; Copyright (C) 2006, 2007 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
22 (define_register_constraint "f" "TARGET_HARD_FLOAT && TARGET_FPRS
23 ? FLOAT_REGS : NO_REGS"
24 "@internal")
25
26 (define_register_constraint "b" "BASE_REGS"
27 "@internal")
28
29 (define_register_constraint "h" "SPECIAL_REGS"
30 "@internal")
31
32 (define_register_constraint "q" "MQ_REGS"
33 "@internal")
34
35 (define_register_constraint "c" "CTR_REGS"
36 "@internal")
37
38 (define_register_constraint "l" "LINK_REGS"
39 "@internal")
40
41 (define_register_constraint "v" "ALTIVEC_REGS"
42 "@internal")
43
44 (define_register_constraint "x" "CR0_REGS"
45 "@internal")
46
47 (define_register_constraint "y" "CR_REGS"
48 "@internal")
49
50 (define_register_constraint "z" "XER_REGS"
51 "@internal")
52
53 ;; Integer constraints
54
55 (define_constraint "I"
56 "A signed 16-bit constant"
57 (and (match_code "const_int")
58 (match_test "(unsigned HOST_WIDE_INT) (ival + 0x8000) < 0x10000")))
59
60 (define_constraint "J"
61 "high-order 16 bits nonzero"
62 (and (match_code "const_int")
63 (match_test "(ival & (~ (unsigned HOST_WIDE_INT) 0xffff0000)) == 0")))
64
65 (define_constraint "K"
66 "low-order 16 bits nonzero"
67 (and (match_code "const_int")
68 (match_test "(ival & (~ (HOST_WIDE_INT) 0xffff)) == 0")))
69
70 (define_constraint "L"
71 "signed 16-bit constant shifted left 16 bits"
72 (and (match_code "const_int")
73 (match_test "((ival & 0xffff) == 0
74 && (ival >> 31 == -1 || ival >> 31 == 0))")))
75
76 (define_constraint "M"
77 "constant greater than 31"
78 (and (match_code "const_int")
79 (match_test "ival > 31")))
80
81 (define_constraint "N"
82 "positive constant that is an exact power of two"
83 (and (match_code "const_int")
84 (match_test "ival > 0 && exact_log2 (ival) >= 0")))
85
86 (define_constraint "O"
87 "constant zero"
88 (and (match_code "const_int")
89 (match_test "ival == 0")))
90
91 (define_constraint "P"
92 "constant whose negation is signed 16-bit constant"
93 (and (match_code "const_int")
94 (match_test "(unsigned HOST_WIDE_INT) ((- ival) + 0x8000) < 0x10000")))
95
96 ;; Floating-point constraints
97
98 (define_constraint "G"
99 "Constant that can be copied into GPR with two insns for DF/DI
100 and one for SF."
101 (and (match_code "const_double")
102 (match_test "num_insns_constant (op, mode)
103 == (mode == SFmode ? 1 : 2)")))
104
105 (define_constraint "H"
106 "DF/DI constant that takes three insns."
107 (and (match_code "const_double")
108 (match_test "num_insns_constant (op, mode) == 3")))
109
110 ;; Memory constraints
111
112 (define_memory_constraint "Q"
113 "Memory operand that is just an offset from a reg"
114 (and (match_code "mem")
115 (match_test "GET_CODE (XEXP (op, 0)) == REG")))
116
117 (define_memory_constraint "Y"
118 "Indexed or word-aligned displacement memory operand"
119 (match_operand 0 "word_offset_memref_operand"))
120
121 (define_memory_constraint "Z"
122 "Indexed or indirect memory operand"
123 (match_operand 0 "indexed_or_indirect_operand"))
124
125 ;; Address constraints
126
127 (define_address_constraint "a"
128 "Indexed or indirect address operand"
129 (match_operand 0 "indexed_or_indirect_address"))
130
131 (define_constraint "R"
132 "AIX TOC entry"
133 (match_test "legitimate_constant_pool_address_p (op)"))
134
135 ;; General constraints
136
137 (define_constraint "S"
138 "Constant that can be placed into a 64-bit mask operand"
139 (match_operand 0 "mask64_operand"))
140
141 (define_constraint "T"
142 "Constant that can be placed into a 32-bit mask operand"
143 (match_operand 0 "mask_operand"))
144
145 (define_constraint "U"
146 "V.4 small data reference"
147 (and (match_test "DEFAULT_ABI == ABI_V4")
148 (match_operand 0 "small_data_operand")))
149
150 (define_constraint "t"
151 "AND masks that can be performed by two rldic{l,r} insns
152 (but excluding those that could match other constraints of anddi3)"
153 (and (and (and (match_operand 0 "mask64_2_operand")
154 (match_test "(fixed_regs[CR0_REGNO]
155 || !logical_operand (op, DImode))"))
156 (not (match_operand 0 "mask_operand")))
157 (not (match_operand 0 "mask64_operand"))))
158
159 (define_constraint "W"
160 "vector constant that does not require memory"
161 (match_operand 0 "easy_vector_constant"))