1 ;; Predicate definitions for MIPS.
2 ;; Copyright (C) 2004 Free Software Foundation, Inc.
4 ;; This file is part of GCC.
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 2, or (at your option)
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.
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with GCC; see the file COPYING. If not, write to
18 ;; the Free Software Foundation, 51 Franklin Street, Fifth Floor,
19 ;; Boston, MA 02110-1301, USA.
21 (define_predicate "const_uns_arith_operand"
22 (and (match_code "const_int")
23 (match_test "SMALL_OPERAND_UNSIGNED (INTVAL (op))")))
25 (define_predicate "uns_arith_operand"
26 (ior (match_operand 0 "const_uns_arith_operand")
27 (match_operand 0 "register_operand")))
29 (define_predicate "const_arith_operand"
30 (and (match_code "const_int")
31 (match_test "SMALL_OPERAND (INTVAL (op))")))
33 (define_predicate "arith_operand"
34 (ior (match_operand 0 "const_arith_operand")
35 (match_operand 0 "register_operand")))
37 (define_predicate "const_uimm6_operand"
38 (and (match_code "const_int")
39 (match_test "UIMM6_OPERAND (INTVAL (op))")))
41 (define_predicate "const_imm10_operand"
42 (and (match_code "const_int")
43 (match_test "IMM10_OPERAND (INTVAL (op))")))
45 (define_predicate "reg_imm10_operand"
46 (ior (match_operand 0 "const_imm10_operand")
47 (match_operand 0 "register_operand")))
49 (define_predicate "sle_operand"
50 (and (match_code "const_int")
51 (match_test "SMALL_OPERAND (INTVAL (op) + 1)")))
53 (define_predicate "sleu_operand"
54 (and (match_operand 0 "sle_operand")
55 (match_test "INTVAL (op) + 1 != 0")))
57 (define_predicate "const_0_operand"
58 (and (match_code "const_int,const_double,const_vector")
59 (match_test "op == CONST0_RTX (GET_MODE (op))")))
61 (define_predicate "reg_or_0_operand"
62 (ior (and (match_operand 0 "const_0_operand")
63 (match_test "!TARGET_MIPS16"))
64 (match_operand 0 "register_operand")))
66 (define_predicate "const_1_operand"
67 (and (match_code "const_int,const_double,const_vector")
68 (match_test "op == CONST1_RTX (GET_MODE (op))")))
70 (define_predicate "reg_or_1_operand"
71 (ior (match_operand 0 "const_1_operand")
72 (match_operand 0 "register_operand")))
74 ;; This is used for indexing into vectors, and hence only accepts const_int.
75 (define_predicate "const_0_or_1_operand"
76 (and (match_code "const_int")
77 (ior (match_test "op == CONST0_RTX (GET_MODE (op))")
78 (match_test "op == CONST1_RTX (GET_MODE (op))"))))
80 (define_predicate "fpr_operand"
81 (and (match_code "reg")
82 (match_test "FP_REG_P (REGNO (op))")))
84 (define_predicate "lo_operand"
85 (and (match_code "reg")
86 (match_test "REGNO (op) == LO_REGNUM")))
88 (define_predicate "fcc_reload_operand"
89 (and (match_code "reg,subreg")
90 (match_test "ST_REG_P (true_regnum (op))")))
92 (define_special_predicate "pc_or_label_operand"
93 (match_code "pc,label_ref"))
95 (define_predicate "const_call_insn_operand"
96 (match_code "const,symbol_ref,label_ref")
98 enum mips_symbol_type symbol_type;
100 if (!mips_symbolic_constant_p (op, &symbol_type))
106 /* We can only use direct calls for TARGET_ABSOLUTE_ABICALLS if we
107 are sure that the target function does not need $25 to be live
108 on entry. This is true for any locally-defined function because
109 any such function will use %hi/%lo accesses to set up $gp. */
110 if (TARGET_ABSOLUTE_ABICALLS
111 && !(GET_CODE (op) == SYMBOL_REF
112 && SYMBOL_REF_DECL (op)
113 && !DECL_EXTERNAL (SYMBOL_REF_DECL (op))))
116 /* If -mlong-calls, force all calls to use register addressing. Also,
117 if this function has the long_call attribute, we must use register
119 return (!TARGET_LONG_CALLS
120 && !(GET_CODE (op) == SYMBOL_REF
121 && SYMBOL_REF_LONG_CALL_P (op)));
123 case SYMBOL_GOT_GLOBAL:
124 /* Without explicit relocs, there is no special syntax for
125 loading the address of a call destination into a register.
126 Using "la $25,foo; jal $25" would prevent the lazy binding
127 of "foo", so keep the address of global symbols with the
129 return !TARGET_EXPLICIT_RELOCS;
136 (define_predicate "call_insn_operand"
137 (ior (match_operand 0 "const_call_insn_operand")
138 (match_operand 0 "register_operand")))
140 ;; A legitimate CONST_INT operand that takes more than one instruction
142 (define_predicate "splittable_const_int_operand"
143 (match_code "const_int")
145 /* When generating mips16 code, LEGITIMATE_CONSTANT_P rejects
146 CONST_INTs that can't be loaded using simple insns. */
150 /* Don't handle multi-word moves this way; we don't want to introduce
151 the individual word-mode moves until after reload. */
152 if (GET_MODE_SIZE (mode) > UNITS_PER_WORD)
155 /* Otherwise check whether the constant can be loaded in a single
157 return !LUI_INT (op) && !SMALL_INT (op) && !SMALL_INT_UNSIGNED (op);
160 ;; A legitimate symbolic operand that takes more than one instruction
162 (define_predicate "splittable_symbolic_operand"
163 (match_code "const,symbol_ref,label_ref")
165 enum mips_symbol_type symbol_type;
166 return (mips_symbolic_constant_p (op, &symbol_type)
167 && mips_split_p[symbol_type]);
170 (define_predicate "move_operand"
171 (match_operand 0 "general_operand")
173 enum mips_symbol_type symbol_type;
175 /* The thinking here is as follows:
177 (1) The move expanders should split complex load sequences into
178 individual instructions. Those individual instructions can
179 then be optimized by all rtl passes.
181 (2) The target of pre-reload load sequences should not be used
182 to store temporary results. If the target register is only
183 assigned one value, reload can rematerialize that value
184 on demand, rather than spill it to the stack.
186 (3) If we allowed pre-reload passes like combine and cse to recreate
187 complex load sequences, we would want to be able to split the
188 sequences before reload as well, so that the pre-reload scheduler
189 can see the individual instructions. This falls foul of (2);
190 the splitter would be forced to reuse the target register for
191 intermediate results.
193 (4) We want to define complex load splitters for combine. These
194 splitters can request a temporary scratch register, which avoids
195 the problem in (2). They allow things like:
197 (set (reg T1) (high SYM))
198 (set (reg T2) (low (reg T1) SYM))
199 (set (reg X) (plus (reg T2) (const_int OFFSET)))
203 (set (reg T3) (high SYM+OFFSET))
204 (set (reg X) (lo_sum (reg T3) SYM+OFFSET))
206 if T2 is only used this once. */
207 switch (GET_CODE (op))
210 return !splittable_const_int_operand (op, mode);
217 return (mips_symbolic_constant_p (op, &symbol_type)
218 && !mips_split_p[symbol_type]);
225 (define_predicate "consttable_operand"
226 (match_test "CONSTANT_P (op)"))
228 (define_predicate "symbolic_operand"
229 (match_code "const,symbol_ref,label_ref")
231 enum mips_symbol_type type;
232 return mips_symbolic_constant_p (op, &type);
235 (define_predicate "general_symbolic_operand"
236 (match_code "const,symbol_ref,label_ref")
238 enum mips_symbol_type type;
239 return mips_symbolic_constant_p (op, &type) && type == SYMBOL_GENERAL;
242 (define_predicate "global_got_operand"
243 (match_code "const,symbol_ref,label_ref")
245 enum mips_symbol_type type;
246 return mips_symbolic_constant_p (op, &type) && type == SYMBOL_GOT_GLOBAL;
249 (define_predicate "local_got_operand"
250 (match_code "const,symbol_ref,label_ref")
252 enum mips_symbol_type type;
253 return mips_symbolic_constant_p (op, &type) && type == SYMBOL_GOT_LOCAL;
256 (define_predicate "stack_operand"
257 (and (match_code "mem")
258 (match_test "mips_stack_address_p (XEXP (op, 0), GET_MODE (op))")))
260 (define_predicate "macc_msac_operand"
261 (ior (and (match_code "plus") (match_test "ISA_HAS_MACC"))
262 (and (match_code "minus") (match_test "ISA_HAS_MSAC")))
264 rtx mult = XEXP (op, GET_CODE (op) == PLUS ? 0 : 1);
265 rtx accum = XEXP (op, GET_CODE (op) == PLUS ? 1 : 0);
266 return (GET_CODE (mult) == MULT
267 && REG_P (XEXP (mult, 0))
268 && REG_P (XEXP (mult, 1))
273 (define_predicate "equality_operator"
274 (match_code "eq,ne"))
276 (define_predicate "extend_operator"
277 (match_code "zero_extend,sign_extend"))
279 (define_predicate "trap_comparison_operator"
280 (match_code "eq,ne,lt,ltu,ge,geu"))
282 (define_predicate "order_operator"
283 (match_code "lt,ltu,le,leu,ge,geu,gt,gtu"))
286 (define_predicate "small_data_pattern"
287 (and (match_code "set,parallel,unspec,unspec_volatile,prefetch")
288 (match_test "mips_small_data_pattern_p (op)")))