1 ;; Predicate definitions for MIPS.
2 ;; Copyright (C) 2004, 2007 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 3, 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 COPYING3. If not see
18 ;; <http://www.gnu.org/licenses/>.
20 (define_predicate "const_uns_arith_operand"
21 (and (match_code "const_int")
22 (match_test "SMALL_OPERAND_UNSIGNED (INTVAL (op))")))
24 (define_predicate "uns_arith_operand"
25 (ior (match_operand 0 "const_uns_arith_operand")
26 (match_operand 0 "register_operand")))
28 (define_predicate "const_arith_operand"
29 (and (match_code "const_int")
30 (match_test "SMALL_OPERAND (INTVAL (op))")))
32 (define_predicate "arith_operand"
33 (ior (match_operand 0 "const_arith_operand")
34 (match_operand 0 "register_operand")))
36 (define_predicate "const_uimm6_operand"
37 (and (match_code "const_int")
38 (match_test "UIMM6_OPERAND (INTVAL (op))")))
40 (define_predicate "const_imm10_operand"
41 (and (match_code "const_int")
42 (match_test "IMM10_OPERAND (INTVAL (op))")))
44 (define_predicate "reg_imm10_operand"
45 (ior (match_operand 0 "const_imm10_operand")
46 (match_operand 0 "register_operand")))
48 (define_predicate "sle_operand"
49 (and (match_code "const_int")
50 (match_test "SMALL_OPERAND (INTVAL (op) + 1)")))
52 (define_predicate "sleu_operand"
53 (and (match_operand 0 "sle_operand")
54 (match_test "INTVAL (op) + 1 != 0")))
56 (define_predicate "const_0_operand"
57 (and (match_code "const_int,const_double,const_vector")
58 (match_test "op == CONST0_RTX (GET_MODE (op))")))
60 (define_predicate "reg_or_0_operand"
61 (ior (and (match_operand 0 "const_0_operand")
62 (match_test "!TARGET_MIPS16"))
63 (match_operand 0 "register_operand")))
65 (define_predicate "const_1_operand"
66 (and (match_code "const_int,const_double,const_vector")
67 (match_test "op == CONST1_RTX (GET_MODE (op))")))
69 (define_predicate "reg_or_1_operand"
70 (ior (match_operand 0 "const_1_operand")
71 (match_operand 0 "register_operand")))
73 ;; This is used for indexing into vectors, and hence only accepts const_int.
74 (define_predicate "const_0_or_1_operand"
75 (and (match_code "const_int")
76 (ior (match_test "op == CONST0_RTX (GET_MODE (op))")
77 (match_test "op == CONST1_RTX (GET_MODE (op))"))))
79 (define_predicate "d_operand"
80 (and (match_code "reg")
81 (match_test "TARGET_MIPS16
82 ? M16_REG_P (REGNO (op))
83 : GP_REG_P (REGNO (op))")))
85 (define_predicate "lo_operand"
86 (and (match_code "reg")
87 (match_test "REGNO (op) == LO_REGNUM")))
89 (define_predicate "fcc_reload_operand"
90 (and (match_code "reg,subreg")
91 (match_test "ST_REG_P (true_regnum (op))")))
93 (define_special_predicate "pc_or_label_operand"
94 (match_code "pc,label_ref"))
96 (define_predicate "const_call_insn_operand"
97 (match_code "const,symbol_ref,label_ref")
99 enum mips_symbol_type symbol_type;
101 if (!mips_symbolic_constant_p (op, SYMBOL_CONTEXT_CALL, &symbol_type))
106 case SYMBOL_ABSOLUTE:
107 /* We can only use direct calls for TARGET_ABSOLUTE_ABICALLS if we
108 are sure that the target function does not need $25 to be live
109 on entry. This is true for any locally-defined function because
110 any such function will use %hi/%lo accesses to set up $gp. */
111 if (TARGET_ABSOLUTE_ABICALLS
112 && !(GET_CODE (op) == SYMBOL_REF
113 && SYMBOL_REF_DECL (op)
114 && !DECL_EXTERNAL (SYMBOL_REF_DECL (op))))
117 /* If -mlong-calls or if this function has an explicit long_call
118 attribute, we must use register addressing. The
119 SYMBOL_FLAG_LONG_CALL bit is set by mips_encode_section_info. */
120 return !(GET_CODE (op) == SYMBOL_REF && SYMBOL_REF_LONG_CALL_P (op));
122 case SYMBOL_GOT_DISP:
123 /* Without explicit relocs, there is no special syntax for
124 loading the address of a call destination into a register.
125 Using "la $25,foo; jal $25" would prevent the lazy binding
126 of "foo", so keep the address of global symbols with the
128 return !TARGET_EXPLICIT_RELOCS;
135 (define_predicate "call_insn_operand"
136 (ior (match_operand 0 "const_call_insn_operand")
137 (match_operand 0 "register_operand")))
139 ;; A legitimate CONST_INT operand that takes more than one instruction
141 (define_predicate "splittable_const_int_operand"
142 (match_code "const_int")
144 /* When generating mips16 code, LEGITIMATE_CONSTANT_P rejects
145 CONST_INTs that can't be loaded using simple insns. */
149 /* Don't handle multi-word moves this way; we don't want to introduce
150 the individual word-mode moves until after reload. */
151 if (GET_MODE_SIZE (mode) > UNITS_PER_WORD)
154 /* Otherwise check whether the constant can be loaded in a single
156 return !LUI_INT (op) && !SMALL_INT (op) && !SMALL_INT_UNSIGNED (op);
159 (define_predicate "move_operand"
160 (match_operand 0 "general_operand")
162 enum mips_symbol_type symbol_type;
164 /* The thinking here is as follows:
166 (1) The move expanders should split complex load sequences into
167 individual instructions. Those individual instructions can
168 then be optimized by all rtl passes.
170 (2) The target of pre-reload load sequences should not be used
171 to store temporary results. If the target register is only
172 assigned one value, reload can rematerialize that value
173 on demand, rather than spill it to the stack.
175 (3) If we allowed pre-reload passes like combine and cse to recreate
176 complex load sequences, we would want to be able to split the
177 sequences before reload as well, so that the pre-reload scheduler
178 can see the individual instructions. This falls foul of (2);
179 the splitter would be forced to reuse the target register for
180 intermediate results.
182 (4) We want to define complex load splitters for combine. These
183 splitters can request a temporary scratch register, which avoids
184 the problem in (2). They allow things like:
186 (set (reg T1) (high SYM))
187 (set (reg T2) (low (reg T1) SYM))
188 (set (reg X) (plus (reg T2) (const_int OFFSET)))
192 (set (reg T3) (high SYM+OFFSET))
193 (set (reg X) (lo_sum (reg T3) SYM+OFFSET))
195 if T2 is only used this once. */
196 switch (GET_CODE (op))
199 return !splittable_const_int_operand (op, mode);
206 return (mips_symbolic_constant_p (op, SYMBOL_CONTEXT_LEA, &symbol_type)
207 && !mips_split_p[symbol_type]);
214 (define_predicate "consttable_operand"
215 (match_test "CONSTANT_P (op)"))
217 (define_predicate "symbolic_operand"
218 (match_code "const,symbol_ref,label_ref")
220 enum mips_symbol_type type;
221 return mips_symbolic_constant_p (op, SYMBOL_CONTEXT_LEA, &type);
224 (define_predicate "absolute_symbolic_operand"
225 (match_code "const,symbol_ref,label_ref")
227 enum mips_symbol_type type;
228 return (mips_symbolic_constant_p (op, SYMBOL_CONTEXT_LEA, &type)
229 && type == SYMBOL_ABSOLUTE);
232 (define_predicate "force_to_mem_operand"
233 (match_code "const,symbol_ref,label_ref")
235 enum mips_symbol_type symbol_type;
236 return (mips_symbolic_constant_p (op, SYMBOL_CONTEXT_LEA, &symbol_type)
237 && symbol_type == SYMBOL_FORCE_TO_MEM);
240 (define_predicate "got_disp_operand"
241 (match_code "const,symbol_ref,label_ref")
243 enum mips_symbol_type type;
244 return (mips_symbolic_constant_p (op, SYMBOL_CONTEXT_LEA, &type)
245 && type == SYMBOL_GOT_DISP);
248 (define_predicate "got_page_ofst_operand"
249 (match_code "const,symbol_ref,label_ref")
251 enum mips_symbol_type type;
252 return (mips_symbolic_constant_p (op, SYMBOL_CONTEXT_LEA, &type)
253 && type == SYMBOL_GOT_PAGE_OFST);
256 (define_predicate "symbol_ref_operand"
257 (match_code "symbol_ref"))
259 (define_predicate "stack_operand"
260 (and (match_code "mem")
261 (match_test "mips_stack_address_p (XEXP (op, 0), GET_MODE (op))")))
263 (define_predicate "macc_msac_operand"
264 (ior (and (match_code "plus") (match_test "ISA_HAS_MACC"))
265 (and (match_code "minus") (match_test "ISA_HAS_MSAC")))
267 rtx mult = XEXP (op, GET_CODE (op) == PLUS ? 0 : 1);
268 rtx accum = XEXP (op, GET_CODE (op) == PLUS ? 1 : 0);
269 return (GET_CODE (mult) == MULT
270 && REG_P (XEXP (mult, 0))
271 && REG_P (XEXP (mult, 1))
276 (define_predicate "equality_operator"
277 (match_code "eq,ne"))
279 (define_predicate "extend_operator"
280 (match_code "zero_extend,sign_extend"))
282 (define_predicate "trap_comparison_operator"
283 (match_code "eq,ne,lt,ltu,ge,geu"))
285 (define_predicate "order_operator"
286 (match_code "lt,ltu,le,leu,ge,geu,gt,gtu"))
289 (define_predicate "small_data_pattern"
290 (and (match_code "set,parallel,unspec,unspec_volatile,prefetch")
291 (match_test "mips_small_data_pattern_p (op)")))