1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
;; Predicate definitions for Motorola 68000.
;; Copyright (C) 2005, 2007 Free Software Foundation, Inc.
;;
;; This file is part of GCC.
;;
;; GCC is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;;
;; GCC is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GCC; see the file COPYING3. If not see
;; <http://www.gnu.org/licenses/>.
;; Special case of a general operand that's used as a source
;; operand. Use this to permit reads from PC-relative memory when
;; -mpcrel is specified.
(define_predicate "general_src_operand"
(match_code "const_int,const_double,const,symbol_ref,label_ref,subreg,reg,mem")
{
if (TARGET_PCREL
&& GET_CODE (op) == MEM
&& (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
|| GET_CODE (XEXP (op, 0)) == LABEL_REF
|| GET_CODE (XEXP (op, 0)) == CONST))
return 1;
return general_operand (op, mode);
})
;; Special case of a nonimmediate operand that's used as a source. Use
;; this to permit reads from PC-relative memory when -mpcrel is
;; specified.
(define_predicate "nonimmediate_src_operand"
(match_code "subreg,reg,mem")
{
if (TARGET_PCREL && GET_CODE (op) == MEM
&& (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
|| GET_CODE (XEXP (op, 0)) == LABEL_REF
|| GET_CODE (XEXP (op, 0)) == CONST))
return 1;
return nonimmediate_operand (op, mode);
})
;; Special case of a memory operand that's used as a source. Use this
;; to permit reads from PC-relative memory when -mpcrel is specified.
(define_predicate "memory_src_operand"
(match_code "subreg,mem")
{
if (TARGET_PCREL && GET_CODE (op) == MEM
&& (GET_CODE (XEXP (op, 0)) == SYMBOL_REF
|| GET_CODE (XEXP (op, 0)) == LABEL_REF
|| GET_CODE (XEXP (op, 0)) == CONST))
return 1;
return memory_operand (op, mode);
})
;; Similar to general_operand, but exclude stack_pointer_rtx.
(define_predicate "not_sp_operand"
(match_code "subreg,reg,mem")
{
return op != stack_pointer_rtx && nonimmediate_operand (op, mode);
})
;; Predicate that accepts only a pc-relative address. This is needed
;; because pc-relative addresses don't satisfy the predicate
;; "general_src_operand".
(define_predicate "pcrel_address"
(match_code "symbol_ref,label_ref,const"))
;; Accept integer operands in the range 0..0xffffffff. We have to
;; check the range carefully since this predicate is used in DImode
;; contexts. Also, we need some extra crud to make it work when
;; hosted on 64-bit machines.
(define_predicate "const_uint32_operand"
(match_code "const_int,const_double")
{
/* It doesn't make sense to ask this question with a mode that is
not larger than 32 bits. */
gcc_assert (GET_MODE_BITSIZE (mode) > 32);
#if HOST_BITS_PER_WIDE_INT > 32
/* All allowed constants will fit a CONST_INT. */
return (GET_CODE (op) == CONST_INT
&& (INTVAL (op) >= 0 && INTVAL (op) <= 0xffffffffL));
#else
return (GET_CODE (op) == CONST_INT
|| (GET_CODE (op) == CONST_DOUBLE && CONST_DOUBLE_HIGH (op) == 0));
#endif
})
;; Accept integer operands in the range -0x80000000..0x7fffffff. We
;; have to check the range carefully since this predicate is used in
;; DImode contexts.
(define_predicate "const_sint32_operand"
(match_code "const_int")
{
/* It doesn't make sense to ask this question with a mode that is
not larger than 32 bits. */
gcc_assert (GET_MODE_BITSIZE (mode) > 32);
/* All allowed constants will fit a CONST_INT. */
return (GET_CODE (op) == CONST_INT
&& (INTVAL (op) >= (-0x7fffffff - 1) && INTVAL (op) <= 0x7fffffff));
})
;; Return true if X is a valid comparison operator for the dbcc
;; instruction. Note it rejects floating point comparison
;; operators. (In the future we could use Fdbcc). It also rejects
;; some comparisons when CC_NO_OVERFLOW is set.
(define_predicate "valid_dbcc_comparison_p"
(and (match_code "eq,ne,gtu,ltu,geu,leu,gt,lt,ge,le")
(match_test "valid_dbcc_comparison_p_2 (op, mode)")))
(define_predicate "m68k_cstore_comparison_operator"
(if_then_else (match_test "TARGET_68881")
(match_operand 0 "comparison_operator")
(match_operand 0 "ordered_comparison_operator")))
;; Check for sign_extend or zero_extend. Used for bit-count operands.
(define_predicate "extend_operator"
(match_code "sign_extend,zero_extend"))
;; Returns true if OP is either a symbol reference or a sum of a
;; symbol reference and a constant. This predicate is for "raw"
;; symbol references not yet processed by legitimize*_address,
;; hence we do not handle UNSPEC_{XGOT, TLS, XTLS} here.
(define_predicate "symbolic_operand"
(match_code "symbol_ref,label_ref,const")
{
switch (GET_CODE (op))
{
case SYMBOL_REF:
case LABEL_REF:
return true;
case CONST:
op = XEXP (op, 0);
return ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF
|| GET_CODE (XEXP (op, 0)) == LABEL_REF)
&& GET_CODE (XEXP (op, 1)) == CONST_INT);
#if 0 /* Deleted, with corresponding change in m68k.h,
so as to fit the specs. No CONST_DOUBLE is ever symbolic. */
case CONST_DOUBLE:
return GET_MODE (op) == mode;
#endif
default:
return false;
}
})
;; A constant that can be used the address in a call insn
(define_predicate "const_call_operand"
(ior (match_operand 0 "const_int_operand")
(and (match_test "m68k_symbolic_call != NULL")
(match_operand 0 "symbolic_operand"))))
;; An operand that can be used as the address in a call insn.
(define_predicate "call_operand"
(ior (match_operand 0 "const_call_operand")
(match_operand 0 "register_operand")))
;; A constant that can be used the address in a sibcall insn
(define_predicate "const_sibcall_operand"
(ior (match_operand 0 "const_int_operand")
(and (match_test "m68k_symbolic_jump != NULL")
(match_operand 0 "symbolic_operand"))))
;; An operand that can be used as the address in a sibcall insn.
(define_predicate "sibcall_operand"
(ior (match_operand 0 "const_sibcall_operand")
(and (match_code "reg")
(match_test "REGNO (op) == STATIC_CHAIN_REGNUM"))))
;; TODO: Add a comment here.
(define_predicate "post_inc_operand"
(and (match_code "mem")
(match_test "GET_CODE (XEXP (op, 0)) == POST_INC")))
;; TODO: Add a comment here.
(define_predicate "pre_dec_operand"
(and (match_code "mem")
(match_test "GET_CODE (XEXP (op, 0)) == PRE_DEC")))
;; A zero constant.
(define_predicate "const0_operand"
(and (match_code "const_int,const_double,const_vector")
(match_test "op == CONST0_RTX (mode)")))
;; A one constant (operand for conditional_trap).
(define_predicate "const1_operand"
(and (match_code "const_int")
(match_test "op == const1_rtx")))
;; A valid operand for a HImode or QImode conditional operation.
;; ColdFire has tst patterns, but not cmp patterns.
(define_predicate "m68k_subword_comparison_operand"
(if_then_else (match_test "TARGET_COLDFIRE")
(and (match_code "const_int")
(match_test "op == const0_rtx"))
(match_operand 0 "general_src_operand")))
;; An operand for movsi_const0 pattern.
(define_predicate "movsi_const0_operand"
(and (match_operand 0 "nonimmediate_operand")
(match_test "(TARGET_68010 || TARGET_COLDFIRE)
|| !(MEM_P (op) && MEM_VOLATILE_P (op))")))
;; A non-symbolic call operand.
;; We need to special case 'const_int' to ignore its mode while matching.
(define_predicate "non_symbolic_call_operand"
(and (match_operand 0 "call_operand")
(ior (and (match_code "const_int")
(match_test "!symbolic_operand (op, mode)"))
(match_test "!symbolic_operand (op,mode)"))))
;; Special case of general_src_operand, which rejects a few fp
;; constants (which we prefer in registers) before reload.
(define_predicate "fp_src_operand"
(match_operand 0 "general_src_operand")
{
return !CONSTANT_P (op)
|| (TARGET_68881
&& (!standard_68881_constant_p (op)
|| reload_in_progress
|| reload_completed));
})
|
