1 ;; Predicate definitions for code generation on the EPIPHANY cpu.
2 ;; Copyright (C) 1994-2017 Free Software Foundation, Inc.
3 ;; Contributed by Embecosm on behalf of Adapteva, Inc.
5 ;; This file is part of GCC.
7 ;; GCC is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 3, or (at your option)
12 ;; GCC is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GCC; see the file COPYING3. If not see
19 ;; <http://www.gnu.org/licenses/>.
21 ;; Returns true iff OP is a symbol reference that is a valid operand
22 ;; in a jump or call instruction.
24 (define_predicate "symbolic_operand"
25 (match_code "symbol_ref,label_ref,const")
27 if (GET_CODE (op) == SYMBOL_REF)
28 return (!epiphany_is_long_call_p (op)
29 && (!flag_pic || SYMBOL_REF_LOCAL_P (op)));
30 if (GET_CODE (op) == LABEL_REF)
32 if (GET_CODE (op) == CONST)
35 if (GET_CODE (op) != PLUS || !symbolic_operand (XEXP (op, 0), mode))
37 /* The idea here is that a 'small' constant offset should be OK.
38 What exactly is considered 'small' is a bit arbitrary. */
39 return satisfies_constraint_L (XEXP (op, 1));
44 ;; Acceptable arguments to the call insn.
46 (define_predicate "call_address_operand"
47 (ior (match_code "reg")
48 (match_operand 0 "symbolic_operand")))
50 (define_predicate "call_operand"
54 return call_address_operand (op, mode);
57 ;; general purpose register.
58 (define_predicate "gpr_operand"
59 (match_code "reg,subreg")
63 if (!register_operand (op, mode))
65 if (GET_CODE (op) == SUBREG)
68 return regno >= FIRST_PSEUDO_REGISTER || regno <= 63;
71 (define_special_predicate "any_gpr_operand"
72 (match_code "subreg,reg")
74 return gpr_operand (op, mode);
77 ;; register suitable for integer add / sub operations; besides general purpose
78 ;; registers we allow fake hard registers that are eliminated to a real
79 ;; hard register via an offset.
80 (define_predicate "add_reg_operand"
81 (match_code "reg,subreg")
85 if (!register_operand (op, mode))
87 if (GET_CODE (op) == SUBREG)
90 return (regno >= FIRST_PSEUDO_REGISTER || regno <= 63
91 || regno == FRAME_POINTER_REGNUM
92 || regno == ARG_POINTER_REGNUM);
95 ;; Also allows suitable constants
96 (define_predicate "add_operand"
97 (match_code "reg,subreg,const_int,symbol_ref,label_ref,const")
99 if (GET_CODE (op) == REG || GET_CODE (op) == SUBREG)
100 return add_reg_operand (op, mode);
101 return satisfies_constraint_L (op) || satisfies_constraint_CnL (op);
104 ;; Ordinary 3rd operand for arithmetic operations
105 (define_predicate "arith_operand"
106 (match_code "reg,subreg,const_int,symbol_ref,label_ref,const")
108 if (GET_CODE (op) == REG || GET_CODE (op) == SUBREG)
109 return register_operand (op, mode);
110 return satisfies_constraint_L (op);
113 ;; Constant integer 3rd operand for arithmetic operations
114 (define_predicate "arith_int_operand"
115 (match_code "const_int,symbol_ref,label_ref,const")
117 return satisfies_constraint_L (op);
120 ;; Return true if OP is an acceptable argument for a single word move source.
122 (define_predicate "move_src_operand"
124 "symbol_ref,label_ref,const,const_int,const_double,reg,subreg,mem,unspec")
126 switch (GET_CODE (op))
133 return immediate_operand (op, mode);
135 /* SImode constants should always fit into a CONST_INT. Large
136 unsigned 32-bit constants are represented as negative CONST_INTs. */
137 gcc_assert (GET_MODE (op) != SImode);
138 /* We can handle 32-bit floating point constants. */
140 return GET_MODE (op) == SFmode;
143 return op != frame_pointer_rtx && register_operand (op, mode);
145 /* (subreg (mem ...) ...) can occur here if the inner part was once a
146 pseudo-reg and is now a stack slot. */
147 if (GET_CODE (SUBREG_REG (op)) == MEM)
148 return address_operand (XEXP (SUBREG_REG (op), 0), mode);
150 return register_operand (op, mode);
152 return address_operand (XEXP (op, 0), mode);
154 return satisfies_constraint_Sra (op);
160 ;; Return true if OP is an acceptable argument for a double word move source.
162 (define_predicate "move_double_src_operand"
163 (match_code "reg,subreg,mem,const_int,const_double,const_vector")
165 if (GET_CODE (op) == MEM && misaligned_operand (op, mode)
166 && !address_operand (plus_constant (Pmode, XEXP (op, 0), 4), SImode))
168 return general_operand (op, mode);
171 ;; Return true if OP is an acceptable argument for a move destination.
173 (define_predicate "move_dest_operand"
174 (match_code "reg,subreg,mem")
176 switch (GET_CODE (op))
179 return register_operand (op, mode);
181 /* (subreg (mem ...) ...) can occur here if the inner part was once a
182 pseudo-reg and is now a stack slot. */
183 if (GET_CODE (SUBREG_REG (op)) == MEM)
185 return address_operand (XEXP (SUBREG_REG (op), 0), mode);
189 return register_operand (op, mode);
192 if (GET_MODE_SIZE (mode) == 8 && misaligned_operand (op, mode)
193 && !address_operand (plus_constant (Pmode, XEXP (op, 0), 4), SImode))
195 return address_operand (XEXP (op, 0), mode);
201 (define_special_predicate "stacktop_operand"
204 if (mode != VOIDmode && GET_MODE (op) != mode)
206 return rtx_equal_p (XEXP (op, 0), stack_pointer_rtx);
209 ;; Return 1 if OP is a comparison operator valid for the mode of CC.
210 ;; This allows the use of MATCH_OPERATOR to recognize all the branch insns.
212 ;; Some insns only set a few bits in the condition code. So only allow those
213 ;; comparisons that use the bits that are valid.
215 (define_predicate "proper_comparison_operator"
216 (match_code "eq, ne, le, lt, ge, gt, leu, ltu, geu, gtu, unordered, ordered, uneq, unge, ungt, unle, unlt, ltgt")
218 enum rtx_code code = GET_CODE (op);
219 rtx cc = XEXP (op, 0);
221 /* combine can try strange things. */
224 switch (GET_MODE (cc))
229 return REGNO (cc) == CC_REGNUM && (code == EQ || code == NE);
231 return REGNO (cc) == CC_REGNUM && (code == LTU || code == GEU);
233 return REGNO (cc) == CC_REGNUM && (code == GTU || code == LEU);
235 return (REGNO (cc) == CCFP_REGNUM
236 && (code == EQ || code == NE || code == LT || code == LE));
238 return (REGNO (cc) == CC_REGNUM
239 && (code == EQ || code == NE || code == GT || code == GE
240 || code == UNLE || code == UNLT));
242 return REGNO (cc) == CC_REGNUM && (code == ORDERED || code == UNORDERED);
244 return REGNO (cc) == CC_REGNUM && (code == UNEQ || code == LTGT);
246 return REGNO (cc) == CC_REGNUM;
248 case QImode: case SImode: case SFmode: case HImode:
249 /* From cse.c:dead_libcall_p. */
257 (define_predicate "addsub_operator"
258 (match_code "plus, minus"))
260 (define_predicate "cc_operand"
261 (and (match_code "reg")
262 (match_test "REGNO (op) == CC_REGNUM || REGNO (op) == CCFP_REGNUM")))
264 (define_predicate "const0_operand"
265 (match_code "const_int, const_double")
267 if (mode == VOIDmode)
268 mode = GET_MODE (op);
269 return op == CONST0_RTX (mode);
272 (define_predicate "const_float_1_operand"
273 (match_code "const_double")
275 return op == CONST1_RTX (mode);
278 (define_predicate "cc_move_operand"
279 (and (match_code "reg")
280 (ior (match_test "REGNO (op) == CC_REGNUM")
281 (match_test "gpr_operand (op, mode)"))))
283 (define_predicate "float_operation"
284 (match_code "parallel")
286 /* Most patterns start out with one SET and one CLOBBER, and gain a USE
287 or two of FP_NEAREST_REGNUM / FP_TRUNCATE_REGNUM / FP_ANYFP_REGNUM
288 after mode switching. The longer patterns are
289 all beyond length 4, and before mode switching, end with a
290 CLOBBER of CCFP_REGNUM. */
291 int count = XVECLEN (op, 0);
292 bool inserted = MACHINE_FUNCTION (cfun)->control_use_inserted;
296 /* Vector ashift has an extra use for the constant factor required to
297 implement the shift as multiply. */
298 || (count == 3 && GET_CODE (XVECEXP (op, 0, 0)) == SET
299 && GET_CODE (XEXP (XVECEXP (op, 0, 0), 1)) == ASHIFT))
302 /* combine / recog will pass any old garbage here before checking the
309 for (i = 2; i < count; i++)
311 rtx x = XVECEXP (op, 0, i);
313 if (GET_CODE (x) == CLOBBER)
315 if (!REG_P (XEXP (x, 0)))
317 if (REGNO (XEXP (x, 0)) == CCFP_REGNUM)
323 /* Just an ordinary clobber, keep looking. */
325 else if (GET_CODE (x) == USE
326 || (GET_CODE (x) == SET && i == 2))
331 if (count != i + 3 || !inserted)
333 for (i = i+1; i < count; i++)
335 rtx x = XVECEXP (op, 0, i);
337 if (GET_CODE (x) != USE && GET_CODE (x) != CLOBBER)
341 || (REGNO (x) != FP_NEAREST_REGNUM
342 && REGNO (x) != FP_TRUNCATE_REGNUM
343 && REGNO (x) != FP_ANYFP_REGNUM))
349 (define_predicate "set_fp_mode_operand"
350 (ior (match_test "gpr_operand (op, mode)")
351 (and (match_code "const")
352 (match_test "satisfies_constraint_Cfm (op)"))))
354 (define_predicate "post_modify_address"
355 (match_code "post_modify,post_inc,post_dec"))
357 (define_predicate "post_modify_operand"
358 (and (match_code "mem")
359 (match_test "post_modify_address (XEXP (op, 0), Pmode)")))
361 ; used in the memory clobber of stack_adjust_str, allows addresses with
363 (define_predicate "memclob_operand"
366 (define_predicate "nonsymbolic_immediate_operand"
367 (ior (match_test "immediate_operand (op, mode)")
368 (match_code "const_vector"))) /* Is this specific enough? */
370 ;; Return true if OP is misaligned memory operand
371 (define_predicate "misaligned_operand"
372 (and (match_code "mem")
373 (match_test "MEM_ALIGN (op) < GET_MODE_ALIGNMENT (mode)")))