1 ;; Constraint definitions for Renesas H8/300.
2 ;; Copyright (C) 2011-2018 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 ;; Register constraints.
21 (define_register_constraint "a" "MAC_REGS"
24 (define_register_constraint "c" "COUNTER_REGS"
27 ;; Some patterns need to use er6 as a scratch register. This is
28 ;; difficult to arrange since er6 is the frame pointer and usually can't
31 ;; Such patterns should define two alternatives, one which allows only
32 ;; er6 and one which allows any general register. The former
33 ;; alternative should have a 'd' constraint while the latter should be
34 ;; disparaged and use 'D'.
36 ;; Normally, 'd' maps to DESTINATION_REGS and 'D' maps to GENERAL_REGS.
37 ;; However, there are cases where they should be NO_REGS:
39 ;; - 'd' should be NO_REGS when reloading a function that uses the
40 ;; frame pointer. In this case, DESTINATION_REGS won't contain any
41 ;; spillable registers, so the first alternative can't be used.
43 ;; - -fno-omit-frame-pointer means that the frame pointer will
44 ;; always be in use. It's therefore better to map 'd' to NO_REGS
45 ;; before reload so that register allocator will pick the second
48 ;; - we would like 'D' to be NO_REGS when the frame pointer isn't
49 ;; live, but we the frame pointer may turn out to be needed after
50 ;; we start reload, and then we may have already decided we don't
51 ;; have a choice, so we can't do that. Forcing the register
52 ;; allocator to use er6 if possible might produce better code for
53 ;; small functions: it's more efficient to save and restore er6 in
54 ;; the prologue & epilogue than to do it in a define_split.
55 ;; Hopefully disparaging 'D' will have a similar effect, without
56 ;; forcing a reload failure if the frame pointer is found to be
59 (define_register_constraint "d"
60 "(!flag_omit_frame_pointer && !reload_completed
62 : (frame_pointer_needed && reload_in_progress
67 (define_register_constraint "D" "GENERAL_REGS"
70 (define_register_constraint "f" "SOURCE_REGS"
73 ;; Integer constraints.
74 (define_constraint "I"
76 (and (match_code "const_int")
77 (match_test "ival == 0")))
79 (define_constraint "J"
80 "An integer with its low byte clear."
81 (and (match_code "const_int")
82 (match_test "(ival & 0xff) == 0")))
84 (define_constraint "L"
85 "1, 2 or 4 on the H8300H or S; 1 or 2 otherwise."
86 (and (match_code "const_int")
87 (if_then_else (match_test "TARGET_H8300H || TARGET_H8300S")
88 (match_test "ival == 1 || ival == 2 || ival == 4")
89 (match_test "ival == 1 || ival == 2"))))
91 (define_constraint "M"
93 (and (match_code "const_int")
94 (match_test "ival == 1 || ival == 2")))
96 (define_constraint "N"
97 "-1, -2, or -4 on the H8300H or S; -1 or -2 otherwise."
98 (and (match_code "const_int")
99 (if_then_else (match_test "TARGET_H8300H || TARGET_H8300S")
100 (match_test "ival == -1 || ival == -2 || ival == -4")
101 (match_test "ival == -1 || ival == -2"))))
103 (define_constraint "O"
105 (and (match_code "const_int")
106 (match_test "ival == -1 || ival == -2")))
108 (define_constraint "P1>X"
109 "A positive, non-zero integer that fits in 1 bits."
110 (and (match_code "const_int")
111 (match_test "TARGET_H8300SX")
112 (match_test "IN_RANGE (ival, 1, (1 << 1) - 1)")))
114 (define_constraint "P3>X"
115 "A positive, non-zero integer that fits in 3 bits."
116 (and (match_code "const_int")
117 (match_test "TARGET_H8300SX")
118 (match_test "IN_RANGE (ival, 1, (1 << 3) - 1)")))
120 (define_constraint "P4>X"
121 "A positive, non-zero integer that fits in 4 bits."
122 (and (match_code "const_int")
123 (match_test "TARGET_H8300SX")
124 (match_test "IN_RANGE (ival, 1, (1 << 4) - 1)")))
126 (define_constraint "P5>X"
127 "A positive, non-zero integer that fits in 5 bits."
128 (and (match_code "const_int")
129 (match_test "TARGET_H8300SX")
130 (match_test "IN_RANGE (ival, 1, (1 << 5) - 1)")))
132 (define_constraint "P8>X"
133 "A positive, non-zero integer that fits in 8 bits."
134 (and (match_code "const_int")
135 (match_test "TARGET_H8300SX")
136 (match_test "IN_RANGE (ival, 1, (1 << 8) - 1)")))
138 (define_constraint "P3<X"
139 "A negative, non-zero integer that fits in 3 bits."
140 (and (match_code "const_int")
141 (match_test "TARGET_H8300SX")
142 (match_test "IN_RANGE (ival, (-(1 << 3)) + 1, -1)")))
144 ;; Floating-point constraints.
145 (define_constraint "G"
147 (and (match_code "const_double")
148 (match_test "op == CONST0_RTX (SFmode)")))
150 ;; Extra constraints.
151 (define_constraint "Q"
153 (and (match_test "TARGET_H8300SX")
154 (match_operand 0 "memory_operand")))
156 (define_constraint "R"
158 (and (match_code "const_int")
159 (match_test "!h8300_shift_needs_scratch_p (ival, QImode)")))
161 (define_constraint "S"
163 (and (match_code "const_int")
164 (match_test "!h8300_shift_needs_scratch_p (ival, HImode)")))
166 (define_constraint "T"
168 (and (match_code "const_int")
169 (match_test "!h8300_shift_needs_scratch_p (ival, SImode)")))
171 (define_constraint "U"
172 "An operand valid for a bset destination."
173 (ior (and (match_code "reg")
174 (match_test "(reload_in_progress || reload_completed)
175 ? REG_OK_FOR_BASE_STRICT_P (op)
176 : REG_OK_FOR_BASE_P (op)"))
177 (and (match_code "mem")
178 (match_code "reg" "0")
179 (match_test "(reload_in_progress || reload_completed)
180 ? REG_OK_FOR_BASE_STRICT_P (XEXP (op, 0))
181 : REG_OK_FOR_BASE_P (XEXP (op, 0))"))
182 (and (match_code "mem")
183 (match_code "symbol_ref" "0")
184 (match_test "TARGET_H8300S"))
185 (and (match_code "mem")
186 (match_code "const" "0")
187 (match_code "plus" "00")
188 (match_code "symbol_ref" "000")
189 (match_code "const_int" "001")
190 (ior (match_test "TARGET_H8300S")
191 (match_test "(SYMBOL_REF_FLAGS (XEXP (XEXP (XEXP (op, 0), 0), 0)) & SYMBOL_FLAG_EIGHTBIT_DATA) != 0")))
192 (and (match_code "mem")
193 (match_test "h8300_eightbit_constant_address_p (XEXP (op, 0))"))
194 (and (match_code "mem")
195 (ior (match_test "TARGET_H8300S")
196 (match_test "TARGET_H8300SX"))
197 (match_code "const_int" "0"))))
199 (define_memory_constraint "WU"
201 (and (match_code "mem")
202 (match_test "satisfies_constraint_U (op)")))
204 (define_constraint "Y0"
206 (and (match_code "const_int")
207 (match_test "exact_log2 (~ival & 0xff) != -1")))
209 (define_constraint "Y2"
211 (and (match_code "const_int")
212 (match_test "exact_log2 (ival & 0xff) != -1")))
214 (define_constraint "Z"
216 (and (match_test "TARGET_H8300SX")
218 (match_test "CONSTANT_P (XEXP (op, 0))")))