1 ;; Operand and operator predicates for the GCC MMIX port.
2 ;; Copyright (C) 2005 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 ;; True if this is a foldable comparison operator
22 ;; - one where a the result of (compare:CC (reg) (const_int 0)) can be
23 ;; replaced by (reg). */
25 (define_predicate "mmix_foldable_comparison_operator"
26 (match_code "ne, eq, ge, gt, le, lt, gtu, leu")
28 RTX_CODE code = GET_CODE (op);
33 /* This little bit is why the body of this predicate is kept as C. */
35 mode = GET_MODE (XEXP (op, 0));
37 return ((mode == CCmode || mode == DImode)
38 && (code == NE || code == EQ || code == GE || code == GT
39 || code == LE || code == LT))
40 /* FIXME: This may be a stupid trick. What happens when GCC wants to
41 reverse the condition? Can it do that by itself? Maybe it can
42 even reverse the condition to fit a foldable one in the first
44 || (mode == CC_UNSmode && (code == GTU || code == LEU));
47 ;; Like comparison_operator, but only true if this comparison operator is
48 ;; applied to a valid mode. Needed to avoid jump.c generating invalid
49 ;; code with -ffast-math (gcc.dg/20001228-1.c).
51 (define_predicate "mmix_comparison_operator"
52 (match_operand 0 "comparison_operator")
54 RTX_CODE code = GET_CODE (op);
56 /* Comparison operators usually don't have a mode, but let's try and get
57 one anyway for the day that changes. */
61 /* Get the mode from the first operand if we don't have one.
62 Also the reason why we do this in C. */
64 mode = GET_MODE (XEXP (op, 0));
66 /* FIXME: This needs to be kept in sync with the tables in
67 mmix_output_condition. */
70 || (mode == CC_FUNmode
71 && (code == ORDERED || code == UNORDERED))
73 && (code == GT || code == LT))
74 || (mode == CC_FPEQmode
75 && (code == NE || code == EQ))
76 || (mode == CC_UNSmode
77 && (code == GEU || code == GTU || code == LEU || code == LTU))
79 && (code == NE || code == EQ || code == GE || code == GT
80 || code == LE || code == LT))
82 && (code == NE || code == EQ || code == GE || code == GT
83 || code == LE || code == LT || code == LEU || code == GTU));
86 ;; True if this is a register with a condition-code mode.
88 (define_predicate "mmix_reg_cc_operand"
89 (and (match_operand 0 "register_operand")
90 (ior (match_test "GET_MODE (op) == CCmode")
91 (ior (match_test "GET_MODE (op) == CC_UNSmode")
92 (ior (match_test "GET_MODE (op) == CC_FPmode")
93 (ior (match_test "GET_MODE (op) == CC_FPEQmode")
94 (match_test "GET_MODE (op) == CC_FUNmode")))))))
96 ;; True if this is an address_operand or a symbolic operand.
98 (define_predicate "mmix_symbolic_or_address_operand"
99 (match_code "symbol_ref, label_ref, const, subreg, reg, plus")
101 switch (GET_CODE (op))
107 /* The reason why this body still is C. */
109 if ((GET_CODE (XEXP (op, 0)) == SYMBOL_REF
110 || GET_CODE (XEXP (op, 0)) == LABEL_REF)
111 && (GET_CODE (XEXP (op, 1)) == CONST_INT
112 || (GET_CODE (XEXP (op, 1)) == CONST_DOUBLE
113 && GET_MODE (XEXP (op, 1)) == VOIDmode)))
117 return address_operand (op, mode);
121 ;; True if this is a register or CONST_INT (or CONST_DOUBLE for DImode).
122 ;; We could narrow the value down with a couple of predicates, but that
123 ;; doesn't seem to be worth it at the moment.
125 (define_predicate "mmix_reg_or_constant_operand"
126 (ior (match_operand 0 "register_operand")
127 (ior (match_code "const_int")
128 (and (match_code "const_double")
129 (match_test "GET_MODE (op) == VOIDmode")))))
131 ;; True if this is a register or 0 (int or float).
133 (define_predicate "mmix_reg_or_0_operand"
135 (match_operand 0 "register_operand")
137 (and (match_code "const_int")
138 (match_test "op == const0_rtx"))
140 (match_code "const_double")
141 ;; FIXME: Is mode calculation necessary and correct?
143 "op == CONST0_RTX (mode == VOIDmode ? GET_MODE (op) : mode)")))))
145 ;; True if this is a register or an int 0..255.
147 (define_predicate "mmix_reg_or_8bit_operand"
149 (match_operand 0 "register_operand")
150 (and (match_code "const_int")
151 (match_test "CONST_OK_FOR_LETTER_P (INTVAL (op), 'I')"))))