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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gas/] [config/] [tc-avr.c] - Blame information for rev 299

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/* tc-avr.c -- Assembler code for the ATMEL AVR
2 
 
3 
   Copyright 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009,
4 
   2010  Free Software Foundation, Inc.
5 
   Contributed by Denis Chertykov <denisc@overta.ru>
6 
 
7 
   This file is part of GAS, the GNU Assembler.
8 
 
9 
   GAS is free software; you can redistribute it and/or modify
10 
   it under the terms of the GNU General Public License as published by
11 
   the Free Software Foundation; either version 3, or (at your option)
12 
   any later version.
13 
 
14 
   GAS is distributed in the hope that it will be useful,
15 
   but WITHOUT ANY WARRANTY; without even the implied warranty of
16 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 
   GNU General Public License for more details.
18 
 
19 
   You should have received a copy of the GNU General Public License
20 
   along with GAS; see the file COPYING.  If not, write to
21 
   the Free Software Foundation, 51 Franklin Street - Fifth Floor,
22 
   Boston, MA 02110-1301, USA.  */
23 
 
24 
#include "as.h"
25 
#include "safe-ctype.h"
26 
#include "subsegs.h"
27 
#include "dw2gencfi.h"
28 
 
29 
 
30 
struct avr_opcodes_s
31 
{
32 
  char *        name;
33 
  char *        constraints;
34 
  char *        opcode;
35 
  int           insn_size;              /* In words.  */
36 
  int           isa;
37 
  unsigned int  bin_opcode;
38 
};
39 
 
40 
#define AVR_INSN(NAME, CONSTR, OPCODE, SIZE, ISA, BIN) \
41 
{#NAME, CONSTR, OPCODE, SIZE, ISA, BIN},
42 
 
43 
struct avr_opcodes_s avr_opcodes[] =
44 
{
45 
  #include "opcode/avr.h"
46 
  {NULL, NULL, NULL, 0, 0, 0}
47 
};
48 
 
49 
const char comment_chars[] = ";";
50 
const char line_comment_chars[] = "#";
51 
const char line_separator_chars[] = "$";
52 
 
53 
const char *md_shortopts = "m:";
54 
struct mcu_type_s
55 
{
56 
  char *name;
57 
  int isa;
58 
  int mach;
59 
};
60 
 
61 
/* XXX - devices that don't seem to exist (renamed, replaced with larger
62 
   ones, or planned but never produced), left here for compatibility.  */
63 
 
64 
static struct mcu_type_s mcu_types[] =
65 
{
66 
  {"avr1",       AVR_ISA_AVR1,    bfd_mach_avr1},
67 
/* TODO: insruction set for avr2 architecture should be AVR_ISA_AVR2,
68 
 but set to AVR_ISA_AVR25 for some following version
69 
 of GCC (from 4.3) for backward compatibility.  */
70 
  {"avr2",       AVR_ISA_AVR25,   bfd_mach_avr2},
71 
  {"avr25",      AVR_ISA_AVR25,   bfd_mach_avr25},
72 
/* TODO: insruction set for avr3 architecture should be AVR_ISA_AVR3,
73 
 but set to AVR_ISA_AVR3_ALL for some following version
74 
 of GCC (from 4.3) for backward compatibility.  */
75 
  {"avr3",       AVR_ISA_AVR3_ALL, bfd_mach_avr3},
76 
  {"avr31",      AVR_ISA_AVR31,   bfd_mach_avr31},
77 
  {"avr35",      AVR_ISA_AVR35,   bfd_mach_avr35},
78 
  {"avr4",       AVR_ISA_AVR4,    bfd_mach_avr4},
79 
/* TODO: insruction set for avr5 architecture should be AVR_ISA_AVR5,
80 
 but set to AVR_ISA_AVR51 for some following version
81 
 of GCC (from 4.3) for backward compatibility.  */
82 
  {"avr5",       AVR_ISA_AVR51,   bfd_mach_avr5},
83 
  {"avr51",      AVR_ISA_AVR51,   bfd_mach_avr51},
84 
  {"avr6",       AVR_ISA_AVR6,    bfd_mach_avr6},
85 
  {"avrxmega1",  AVR_ISA_XMEGA,   bfd_mach_avrxmega1},
86 
  {"avrxmega2",  AVR_ISA_XMEGA,   bfd_mach_avrxmega2},
87 
  {"avrxmega3",  AVR_ISA_XMEGA,   bfd_mach_avrxmega3},
88 
  {"avrxmega4",  AVR_ISA_XMEGA,   bfd_mach_avrxmega4},
89 
  {"avrxmega5",  AVR_ISA_XMEGA,   bfd_mach_avrxmega5},
90 
  {"avrxmega6",  AVR_ISA_XMEGA,   bfd_mach_avrxmega6},
91 
  {"avrxmega7",  AVR_ISA_XMEGA,   bfd_mach_avrxmega7},
92 
  {"at90s1200",  AVR_ISA_1200,    bfd_mach_avr1},
93 
  {"attiny11",   AVR_ISA_AVR1,    bfd_mach_avr1},
94 
  {"attiny12",   AVR_ISA_AVR1,    bfd_mach_avr1},
95 
  {"attiny15",   AVR_ISA_AVR1,    bfd_mach_avr1},
96 
  {"attiny28",   AVR_ISA_AVR1,    bfd_mach_avr1},
97 
  {"at90s2313",  AVR_ISA_AVR2,    bfd_mach_avr2},
98 
  {"at90s2323",  AVR_ISA_AVR2,    bfd_mach_avr2},
99 
  {"at90s2333",  AVR_ISA_AVR2,    bfd_mach_avr2}, /* XXX -> 4433 */
100 
  {"at90s2343",  AVR_ISA_AVR2,    bfd_mach_avr2},
101 
  {"attiny22",   AVR_ISA_AVR2,    bfd_mach_avr2}, /* XXX -> 2343 */
102 
  {"attiny26",   AVR_ISA_2xxe,    bfd_mach_avr2},
103 
  {"at90s4414",  AVR_ISA_AVR2,    bfd_mach_avr2}, /* XXX -> 8515 */
104 
  {"at90s4433",  AVR_ISA_AVR2,    bfd_mach_avr2},
105 
  {"at90s4434",  AVR_ISA_AVR2,    bfd_mach_avr2}, /* XXX -> 8535 */
106 
  {"at90s8515",  AVR_ISA_AVR2,    bfd_mach_avr2},
107 
  {"at90c8534",  AVR_ISA_AVR2,    bfd_mach_avr2},
108 
  {"at90s8535",  AVR_ISA_AVR2,    bfd_mach_avr2},
109 
  {"attiny13",   AVR_ISA_AVR25,   bfd_mach_avr25},
110 
  {"attiny13a",  AVR_ISA_AVR25,   bfd_mach_avr25},
111 
  {"attiny2313", AVR_ISA_AVR25,   bfd_mach_avr25},
112 
  {"attiny2313a",AVR_ISA_AVR25,   bfd_mach_avr25},
113 
  {"attiny24",   AVR_ISA_AVR25,   bfd_mach_avr25},
114 
  {"attiny24a",  AVR_ISA_AVR25,   bfd_mach_avr25},
115 
  {"attiny4313", AVR_ISA_AVR25,   bfd_mach_avr25},
116 
  {"attiny44",   AVR_ISA_AVR25,   bfd_mach_avr25},
117 
  {"attiny44a",  AVR_ISA_AVR25,   bfd_mach_avr25},
118 
  {"attiny84",   AVR_ISA_AVR25,   bfd_mach_avr25},
119 
  {"attiny84a",  AVR_ISA_AVR25,   bfd_mach_avr25},
120 
  {"attiny25",   AVR_ISA_AVR25,   bfd_mach_avr25},
121 
  {"attiny45",   AVR_ISA_AVR25,   bfd_mach_avr25},
122 
  {"attiny85",   AVR_ISA_AVR25,   bfd_mach_avr25},
123 
  {"attiny261",  AVR_ISA_AVR25,   bfd_mach_avr25},
124 
  {"attiny261a", AVR_ISA_AVR25,   bfd_mach_avr25},
125 
  {"attiny461",  AVR_ISA_AVR25,   bfd_mach_avr25},
126 
  {"attiny461a", AVR_ISA_AVR25,   bfd_mach_avr25},
127 
  {"attiny861",  AVR_ISA_AVR25,   bfd_mach_avr25},
128 
  {"attiny861a", AVR_ISA_AVR25,   bfd_mach_avr25},
129 
  {"attiny87",   AVR_ISA_AVR25,   bfd_mach_avr25},
130 
  {"attiny43u",  AVR_ISA_AVR25,   bfd_mach_avr25},
131 
  {"attiny48",   AVR_ISA_AVR25,   bfd_mach_avr25},
132 
  {"attiny88",   AVR_ISA_AVR25,   bfd_mach_avr25},
133 
  {"at86rf401",  AVR_ISA_RF401,   bfd_mach_avr25},
134 
  {"ata6289",    AVR_ISA_AVR25,   bfd_mach_avr25},
135 
  {"at43usb355", AVR_ISA_AVR3,    bfd_mach_avr3},
136 
  {"at76c711",   AVR_ISA_AVR3,    bfd_mach_avr3},
137 
  {"atmega103",  AVR_ISA_AVR31,   bfd_mach_avr31},
138 
  {"at43usb320", AVR_ISA_AVR31,   bfd_mach_avr31},
139 
  {"attiny167",  AVR_ISA_AVR35,   bfd_mach_avr35},
140 
  {"at90usb82",  AVR_ISA_AVR35,   bfd_mach_avr35},
141 
  {"at90usb162", AVR_ISA_AVR35,   bfd_mach_avr35},
142 
  {"atmega8u2",  AVR_ISA_AVR35,   bfd_mach_avr35},
143 
  {"atmega16u2", AVR_ISA_AVR35,   bfd_mach_avr35},
144 
  {"atmega32u2", AVR_ISA_AVR35,   bfd_mach_avr35},
145 
  {"atmega8",    AVR_ISA_M8,      bfd_mach_avr4},
146 
  {"atmega48",   AVR_ISA_AVR4,    bfd_mach_avr4},
147 
  {"atmega48a",  AVR_ISA_AVR4,    bfd_mach_avr4},
148 
  {"atmega48p",  AVR_ISA_AVR4,    bfd_mach_avr4},
149 
  {"atmega88",   AVR_ISA_AVR4,    bfd_mach_avr4},
150 
  {"atmega88a",  AVR_ISA_AVR4,    bfd_mach_avr4},
151 
  {"atmega88p",  AVR_ISA_AVR4,    bfd_mach_avr4},
152 
  {"atmega88pa", AVR_ISA_AVR4,    bfd_mach_avr4},
153 
  {"atmega8515", AVR_ISA_M8,      bfd_mach_avr4},
154 
  {"atmega8535", AVR_ISA_M8,      bfd_mach_avr4},
155 
  {"atmega8hva", AVR_ISA_AVR4,    bfd_mach_avr4},
156 
  {"at90pwm1",   AVR_ISA_AVR4,    bfd_mach_avr4},
157 
  {"at90pwm2",   AVR_ISA_AVR4,    bfd_mach_avr4},
158 
  {"at90pwm2b",  AVR_ISA_AVR4,    bfd_mach_avr4},
159 
  {"at90pwm3",   AVR_ISA_AVR4,    bfd_mach_avr4},
160 
  {"at90pwm3b",  AVR_ISA_AVR4,    bfd_mach_avr4},
161 
  {"at90pwm81",  AVR_ISA_AVR4,    bfd_mach_avr4},
162 
  {"atmega16",   AVR_ISA_AVR5,    bfd_mach_avr5},
163 
  {"atmega16a",  AVR_ISA_AVR5,    bfd_mach_avr5},
164 
  {"atmega161",  AVR_ISA_M161,    bfd_mach_avr5},
165 
  {"atmega162",  AVR_ISA_AVR5,    bfd_mach_avr5},
166 
  {"atmega163",  AVR_ISA_M161,    bfd_mach_avr5},
167 
  {"atmega164a", AVR_ISA_AVR5,    bfd_mach_avr5},
168 
  {"atmega164p", AVR_ISA_AVR5,    bfd_mach_avr5},
169 
  {"atmega165",  AVR_ISA_AVR5,    bfd_mach_avr5},
170 
  {"atmega165a", AVR_ISA_AVR5,    bfd_mach_avr5},
171 
  {"atmega165p", AVR_ISA_AVR5,    bfd_mach_avr5},
172 
  {"atmega168",  AVR_ISA_AVR5,    bfd_mach_avr5},
173 
  {"atmega168a", AVR_ISA_AVR5,    bfd_mach_avr5},
174 
  {"atmega168p", AVR_ISA_AVR5,    bfd_mach_avr5},
175 
  {"atmega169",  AVR_ISA_AVR5,    bfd_mach_avr5},
176 
  {"atmega169a", AVR_ISA_AVR5,    bfd_mach_avr5},
177 
  {"atmega169p", AVR_ISA_AVR5,    bfd_mach_avr5},
178 
  {"atmega169pa",AVR_ISA_AVR5,    bfd_mach_avr5},
179 
  {"atmega32",   AVR_ISA_AVR5,    bfd_mach_avr5},
180 
  {"atmega323",  AVR_ISA_AVR5,    bfd_mach_avr5},
181 
  {"atmega324a", AVR_ISA_AVR5,    bfd_mach_avr5},
182 
  {"atmega324p", AVR_ISA_AVR5,    bfd_mach_avr5},
183 
  {"atmega324pa",AVR_ISA_AVR5,    bfd_mach_avr5},
184 
  {"atmega325",  AVR_ISA_AVR5,    bfd_mach_avr5},
185 
  {"atmega325a", AVR_ISA_AVR5,    bfd_mach_avr5},
186 
  {"atmega325p", AVR_ISA_AVR5,    bfd_mach_avr5},
187 
  {"atmega325pa",AVR_ISA_AVR5,    bfd_mach_avr5},
188 
  {"atmega3250", AVR_ISA_AVR5,    bfd_mach_avr5},
189 
  {"atmega3250a",AVR_ISA_AVR5,    bfd_mach_avr5},
190 
  {"atmega3250p",AVR_ISA_AVR5,    bfd_mach_avr5},
191 
  {"atmega3250pa",AVR_ISA_AVR5,   bfd_mach_avr5},
192 
  {"atmega328",  AVR_ISA_AVR5,    bfd_mach_avr5},
193 
  {"atmega328p", AVR_ISA_AVR5,    bfd_mach_avr5},
194 
  {"atmega329",  AVR_ISA_AVR5,    bfd_mach_avr5},
195 
  {"atmega329a", AVR_ISA_AVR5,    bfd_mach_avr5},
196 
  {"atmega329p", AVR_ISA_AVR5,    bfd_mach_avr5},
197 
  {"atmega329pa",AVR_ISA_AVR5,    bfd_mach_avr5},
198 
  {"atmega3290", AVR_ISA_AVR5,    bfd_mach_avr5},
199 
  {"atmega3290a",AVR_ISA_AVR5,    bfd_mach_avr5},
200 
  {"atmega3290p",AVR_ISA_AVR5,    bfd_mach_avr5},
201 
  {"atmega3290pa",AVR_ISA_AVR5,   bfd_mach_avr5},
202 
  {"atmega406",  AVR_ISA_AVR5,    bfd_mach_avr5},
203 
  {"atmega64",   AVR_ISA_AVR5,    bfd_mach_avr5},
204 
  {"atmega640",  AVR_ISA_AVR5,    bfd_mach_avr5},
205 
  {"atmega644",  AVR_ISA_AVR5,    bfd_mach_avr5},
206 
  {"atmega644a", AVR_ISA_AVR5,    bfd_mach_avr5},
207 
  {"atmega644p", AVR_ISA_AVR5,    bfd_mach_avr5},
208 
  {"atmega644pa",AVR_ISA_AVR5,    bfd_mach_avr5},
209 
  {"atmega645",  AVR_ISA_AVR5,    bfd_mach_avr5},
210 
  {"atmega645a", AVR_ISA_AVR5,    bfd_mach_avr5},
211 
  {"atmega645p", AVR_ISA_AVR5,    bfd_mach_avr5},
212 
  {"atmega649",  AVR_ISA_AVR5,    bfd_mach_avr5},
213 
  {"atmega649a", AVR_ISA_AVR5,    bfd_mach_avr5},
214 
  {"atmega649p", AVR_ISA_AVR5,    bfd_mach_avr5},
215 
  {"atmega6450", AVR_ISA_AVR5,    bfd_mach_avr5},
216 
  {"atmega6450a",AVR_ISA_AVR5,    bfd_mach_avr5},
217 
  {"atmega6450p",AVR_ISA_AVR5,    bfd_mach_avr5},
218 
  {"atmega6490", AVR_ISA_AVR5,    bfd_mach_avr5},
219 
  {"atmega6490a",AVR_ISA_AVR5,    bfd_mach_avr5},
220 
  {"atmega6490p",AVR_ISA_AVR5,    bfd_mach_avr5},
221 
  {"atmega16hva",AVR_ISA_AVR5,    bfd_mach_avr5},
222 
  {"atmega16hva2",AVR_ISA_AVR5,    bfd_mach_avr5},
223 
  {"atmega16hvb",AVR_ISA_AVR5,    bfd_mach_avr5},
224 
  {"atmega16hvbrevb",AVR_ISA_AVR5,bfd_mach_avr5},
225 
  {"atmega32hvb",AVR_ISA_AVR5,    bfd_mach_avr5},
226 
  {"atmega32hvbrevb",AVR_ISA_AVR5,bfd_mach_avr5},
227 
  {"atmega64hve",AVR_ISA_AVR5,    bfd_mach_avr5},
228 
  {"at90can32" , AVR_ISA_AVR5,    bfd_mach_avr5},
229 
  {"at90can64" , AVR_ISA_AVR5,    bfd_mach_avr5},
230 
  {"at90pwm161", AVR_ISA_AVR5,    bfd_mach_avr5},
231 
  {"at90pwm216", AVR_ISA_AVR5,    bfd_mach_avr5},
232 
  {"at90pwm316", AVR_ISA_AVR5,    bfd_mach_avr5},
233 
  {"atmega32c1", AVR_ISA_AVR5,    bfd_mach_avr5},
234 
  {"atmega64c1", AVR_ISA_AVR5,    bfd_mach_avr5},
235 
  {"atmega16m1", AVR_ISA_AVR5,    bfd_mach_avr5},
236 
  {"atmega32m1", AVR_ISA_AVR5,    bfd_mach_avr5},
237 
  {"atmega64m1", AVR_ISA_AVR5,    bfd_mach_avr5},
238 
  {"atmega16u4", AVR_ISA_AVR5,    bfd_mach_avr5},
239 
  {"atmega32u4", AVR_ISA_AVR5,    bfd_mach_avr5},
240 
  {"atmega32u6", AVR_ISA_AVR5,    bfd_mach_avr5},
241 
  {"at90usb646", AVR_ISA_AVR5,    bfd_mach_avr5},
242 
  {"at90usb647", AVR_ISA_AVR5,    bfd_mach_avr5},
243 
  {"at90scr100", AVR_ISA_AVR5,    bfd_mach_avr5},
244 
  {"at94k",      AVR_ISA_94K,     bfd_mach_avr5},
245 
  {"m3000",      AVR_ISA_AVR5,    bfd_mach_avr5},
246 
  {"atmega128",  AVR_ISA_AVR51,   bfd_mach_avr51},
247 
  {"atmega1280", AVR_ISA_AVR51,   bfd_mach_avr51},
248 
  {"atmega1281", AVR_ISA_AVR51,   bfd_mach_avr51},
249 
  {"atmega1284p",AVR_ISA_AVR51,   bfd_mach_avr51},
250 
  {"atmega128rfa1",AVR_ISA_AVR51, bfd_mach_avr51},
251 
  {"at90can128", AVR_ISA_AVR51,   bfd_mach_avr51},
252 
  {"at90usb1286",AVR_ISA_AVR51,   bfd_mach_avr51},
253 
  {"at90usb1287",AVR_ISA_AVR51,   bfd_mach_avr51},
254 
  {"atmega2560", AVR_ISA_AVR6,    bfd_mach_avr6},
255 
  {"atmega2561", AVR_ISA_AVR6,    bfd_mach_avr6},
256 
  {"atxmega16a4", AVR_ISA_XMEGA,  bfd_mach_avrxmega2},
257 
  {"atxmega16d4", AVR_ISA_XMEGA,  bfd_mach_avrxmega2},
258 
  {"atxmega16x1", AVR_ISA_XMEGA,  bfd_mach_avrxmega2},
259 
  {"atxmega32a4", AVR_ISA_XMEGA,  bfd_mach_avrxmega2},
260 
  {"atxmega32d4", AVR_ISA_XMEGA,  bfd_mach_avrxmega2},
261 
  {"atxmega32x1", AVR_ISA_XMEGA,  bfd_mach_avrxmega2},
262 
  {"atxmega64a3", AVR_ISA_XMEGA,  bfd_mach_avrxmega4},
263 
  {"atxmega64d3", AVR_ISA_XMEGA,  bfd_mach_avrxmega4},
264 
  {"atxmega64a1", AVR_ISA_XMEGA,  bfd_mach_avrxmega5},
265 
  {"atxmega64a1u",AVR_ISA_XMEGA,  bfd_mach_avrxmega5},
266 
  {"atxmega128a3", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
267 
  {"atxmega128b1", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
268 
  {"atxmega128d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
269 
  {"atxmega192a3", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
270 
  {"atxmega192d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
271 
  {"atxmega256a3", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
272 
  {"atxmega256a3b",AVR_ISA_XMEGA, bfd_mach_avrxmega6},
273 
  {"atxmega256a3bu",AVR_ISA_XMEGA,bfd_mach_avrxmega6},
274 
  {"atxmega256d3", AVR_ISA_XMEGA, bfd_mach_avrxmega6},
275 
  {"atxmega128a1", AVR_ISA_XMEGA, bfd_mach_avrxmega7},
276 
  {"atxmega128a1u", AVR_ISA_XMEGA, bfd_mach_avrxmega7},
277 
  {NULL, 0, 0}
278 
};
279 
 
280 
/* Current MCU type.  */
281 
static struct mcu_type_s   default_mcu = {"avr2", AVR_ISA_AVR2, bfd_mach_avr2};
282 
static struct mcu_type_s * avr_mcu = & default_mcu;
283 
 
284 
/* AVR target-specific switches.  */
285 
struct avr_opt_s
286 
{
287 
  int all_opcodes;  /* -mall-opcodes: accept all known AVR opcodes.  */
288 
  int no_skip_bug;  /* -mno-skip-bug: no warnings for skipping 2-word insns.  */
289 
  int no_wrap;      /* -mno-wrap: reject rjmp/rcall with 8K wrap-around.  */
290 
};
291 
 
292 
static struct avr_opt_s avr_opt = { 0, 0, 0 };
293 
 
294 
const char EXP_CHARS[] = "eE";
295 
const char FLT_CHARS[] = "dD";
296 
 
297 
static void avr_set_arch (int);
298 
 
299 
/* The target specific pseudo-ops which we support.  */
300 
const pseudo_typeS md_pseudo_table[] =
301 
{
302 
  {"arch", avr_set_arch,        0},
303 
  { NULL,       NULL,           0}
304 
};
305 
 
306 
#define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
307 
 
308 
#define EXP_MOD_NAME(i)       exp_mod[i].name
309 
#define EXP_MOD_RELOC(i)      exp_mod[i].reloc
310 
#define EXP_MOD_NEG_RELOC(i)  exp_mod[i].neg_reloc
311 
#define HAVE_PM_P(i)          exp_mod[i].have_pm
312 
 
313 
struct exp_mod_s
314 
{
315 
  char *                    name;
316 
  bfd_reloc_code_real_type  reloc;
317 
  bfd_reloc_code_real_type  neg_reloc;
318 
  int                       have_pm;
319 
};
320 
 
321 
static struct exp_mod_s exp_mod[] =
322 
{
323 
  {"hh8",    BFD_RELOC_AVR_HH8_LDI,    BFD_RELOC_AVR_HH8_LDI_NEG,    1},
324 
  {"pm_hh8", BFD_RELOC_AVR_HH8_LDI_PM, BFD_RELOC_AVR_HH8_LDI_PM_NEG, 0},
325 
  {"hi8",    BFD_RELOC_AVR_HI8_LDI,    BFD_RELOC_AVR_HI8_LDI_NEG,    1},
326 
  {"pm_hi8", BFD_RELOC_AVR_HI8_LDI_PM, BFD_RELOC_AVR_HI8_LDI_PM_NEG, 0},
327 
  {"lo8",    BFD_RELOC_AVR_LO8_LDI,    BFD_RELOC_AVR_LO8_LDI_NEG,    1},
328 
  {"pm_lo8", BFD_RELOC_AVR_LO8_LDI_PM, BFD_RELOC_AVR_LO8_LDI_PM_NEG, 0},
329 
  {"hlo8",   BFD_RELOC_AVR_HH8_LDI,    BFD_RELOC_AVR_HH8_LDI_NEG,    0},
330 
  {"hhi8",   BFD_RELOC_AVR_MS8_LDI,    BFD_RELOC_AVR_MS8_LDI_NEG,    0},
331 
};
332 
 
333 
/* A union used to store indicies into the exp_mod[] array
334 
   in a hash table which expects void * data types.  */
335 
typedef union
336 
{
337 
  void * ptr;
338 
  int    index;
339 
} mod_index;
340 
 
341 
/* Opcode hash table.  */
342 
static struct hash_control *avr_hash;
343 
 
344 
/* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx).  */
345 
static struct hash_control *avr_mod_hash;
346 
 
347 
#define OPTION_MMCU 'm'
348 
enum options
349 
{
350 
  OPTION_ALL_OPCODES = OPTION_MD_BASE + 1,
351 
  OPTION_NO_SKIP_BUG,
352 
  OPTION_NO_WRAP
353 
};
354 
 
355 
struct option md_longopts[] =
356 
{
357 
  { "mmcu",   required_argument, NULL, OPTION_MMCU        },
358 
  { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES },
359 
  { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG },
360 
  { "mno-wrap",     no_argument, NULL, OPTION_NO_WRAP     },
361 
  { NULL, no_argument, NULL, 0 }
362 
};
363 
 
364 
size_t md_longopts_size = sizeof (md_longopts);
365 
 
366 
/* Display nicely formatted list of known MCU names.  */
367 
 
368 
static void
369 
show_mcu_list (FILE *stream)
370 
{
371 
  int i, x;
372 
 
373 
  fprintf (stream, _("Known MCU names:"));
374 
  x = 1000;
375 
 
376 
  for (i = 0; mcu_types[i].name; i++)
377 
    {
378 
      int len = strlen (mcu_types[i].name);
379 
 
380 
      x += len + 1;
381 
 
382 
      if (x < 75)
383 
        fprintf (stream, " %s", mcu_types[i].name);
384 
      else
385 
        {
386 
          fprintf (stream, "\n  %s", mcu_types[i].name);
387 
          x = len + 2;
388 
        }
389 
    }
390 
 
391 
  fprintf (stream, "\n");
392 
}
393 
 
394 
static inline char *
395 
skip_space (char *s)
396 
{
397 
  while (*s == ' ' || *s == '\t')
398 
    ++s;
399 
  return s;
400 
}
401 
 
402 
/* Extract one word from FROM and copy it to TO.  */
403 
 
404 
static char *
405 
extract_word (char *from, char *to, int limit)
406 
{
407 
  char *op_end;
408 
  int size = 0;
409 
 
410 
  /* Drop leading whitespace.  */
411 
  from = skip_space (from);
412 
  *to = 0;
413 
 
414 
  /* Find the op code end.  */
415 
  for (op_end = from; *op_end != 0 && is_part_of_name (*op_end);)
416 
    {
417 
      to[size++] = *op_end++;
418 
      if (size + 1 >= limit)
419 
        break;
420 
    }
421 
 
422 
  to[size] = 0;
423 
  return op_end;
424 
}
425 
 
426 
int
427 
md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED,
428 
                               asection *seg ATTRIBUTE_UNUSED)
429 
{
430 
  abort ();
431 
  return 0;
432 
}
433 
 
434 
void
435 
md_show_usage (FILE *stream)
436 
{
437 
  fprintf (stream,
438 
      _("AVR Assembler options:\n"
439 
        "  -mmcu=[avr-name] select microcontroller variant\n"
440 
        "                   [avr-name] can be:\n"
441 
        "                   avr1  - classic AVR core without data RAM\n"
442 
        "                   avr2  - classic AVR core with up to 8K program memory\n"
443 
        "                   avr25 - classic AVR core with up to 8K program memory\n"
444 
        "                           plus the MOVW instruction\n"
445 
        "                   avr3  - classic AVR core with up to 64K program memory\n"
446 
        "                   avr31 - classic AVR core with up to 128K program memory\n"
447 
        "                   avr35 - classic AVR core with up to 64K program memory\n"
448 
        "                           plus the MOVW instruction\n"
449 
        "                   avr4  - enhanced AVR core with up to 8K program memory\n"
450 
        "                   avr5  - enhanced AVR core with up to 64K program memory\n"
451 
        "                   avr51 - enhanced AVR core with up to 128K program memory\n"
452 
        "                   avr6  - enhanced AVR core with up to 256K program memory\n"
453 
        "                   avrxmega3 - XMEGA, > 8K, <= 64K FLASH, > 64K RAM\n"
454 
        "                   avrxmega4 - XMEGA, > 64K, <= 128K FLASH, <= 64K RAM\n"
455 
        "                   avrxmega5 - XMEGA, > 64K, <= 128K FLASH, > 64K RAM\n"
456 
        "                   avrxmega6 - XMEGA, > 128K, <= 256K FLASH, <= 64K RAM\n"
457 
        "                   avrxmega7 - XMEGA, > 128K, <= 256K FLASH, > 64K RAM\n"
458 
        "                   or immediate microcontroller name.\n"));
459 
  fprintf (stream,
460 
      _("  -mall-opcodes    accept all AVR opcodes, even if not supported by MCU\n"
461 
        "  -mno-skip-bug    disable warnings for skipping two-word instructions\n"
462 
        "                   (default for avr4, avr5)\n"
463 
        "  -mno-wrap        reject rjmp/rcall instructions with 8K wrap-around\n"
464 
        "                   (default for avr3, avr5)\n"));
465 
  show_mcu_list (stream);
466 
}
467 
 
468 
static void
469 
avr_set_arch (int dummy ATTRIBUTE_UNUSED)
470 
{
471 
  char str[20];
472 
 
473 
  input_line_pointer = extract_word (input_line_pointer, str, 20);
474 
  md_parse_option (OPTION_MMCU, str);
475 
  bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
476 
}
477 
 
478 
int
479 
md_parse_option (int c, char *arg)
480 
{
481 
  switch (c)
482 
    {
483 
    case OPTION_MMCU:
484 
      {
485 
        int i;
486 
        char *s = alloca (strlen (arg) + 1);
487 
 
488 
        {
489 
          char *t = s;
490 
          char *arg1 = arg;
491 
 
492 
          do
493 
            *t = TOLOWER (*arg1++);
494 
          while (*t++);
495 
        }
496 
 
497 
        for (i = 0; mcu_types[i].name; ++i)
498 
          if (strcmp (mcu_types[i].name, s) == 0)
499 
            break;
500 
 
501 
        if (!mcu_types[i].name)
502 
          {
503 
            show_mcu_list (stderr);
504 
            as_fatal (_("unknown MCU: %s\n"), arg);
505 
          }
506 
 
507 
        /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
508 
           type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
509 
           as .arch ... in the asm output at the same time.  */
510 
        if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
511 
          avr_mcu = &mcu_types[i];
512 
        else
513 
          as_fatal (_("redefinition of mcu type `%s' to `%s'"),
514 
                    avr_mcu->name, mcu_types[i].name);
515 
        return 1;
516 
      }
517 
    case OPTION_ALL_OPCODES:
518 
      avr_opt.all_opcodes = 1;
519 
      return 1;
520 
    case OPTION_NO_SKIP_BUG:
521 
      avr_opt.no_skip_bug = 1;
522 
      return 1;
523 
    case OPTION_NO_WRAP:
524 
      avr_opt.no_wrap = 1;
525 
      return 1;
526 
    }
527 
 
528 
  return 0;
529 
}
530 
 
531 
symbolS *
532 
md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
533 
{
534 
  return NULL;
535 
}
536 
 
537 
char *
538 
md_atof (int type, char *litP, int *sizeP)
539 
{
540 
  return ieee_md_atof (type, litP, sizeP, FALSE);
541 
}
542 
 
543 
void
544 
md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
545 
                 asection *sec ATTRIBUTE_UNUSED,
546 
                 fragS *fragP ATTRIBUTE_UNUSED)
547 
{
548 
  abort ();
549 
}
550 
 
551 
void
552 
md_begin (void)
553 
{
554 
  unsigned int i;
555 
  struct avr_opcodes_s *opcode;
556 
 
557 
  avr_hash = hash_new ();
558 
 
559 
  /* Insert unique names into hash table.  This hash table then provides a
560 
     quick index to the first opcode with a particular name in the opcode
561 
     table.  */
562 
  for (opcode = avr_opcodes; opcode->name; opcode++)
563 
    hash_insert (avr_hash, opcode->name, (char *) opcode);
564 
 
565 
  avr_mod_hash = hash_new ();
566 
 
567 
  for (i = 0; i < ARRAY_SIZE (exp_mod); ++i)
568 
    {
569 
      mod_index m;
570 
 
571 
      m.index = i + 10;
572 
      hash_insert (avr_mod_hash, EXP_MOD_NAME (i), m.ptr);
573 
    }
574 
 
575 
  bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
576 
}
577 
 
578 
/* Resolve STR as a constant expression and return the result.
579 
   If result greater than MAX then error.  */
580 
 
581 
static unsigned int
582 
avr_get_constant (char *str, int max)
583 
{
584 
  expressionS ex;
585 
 
586 
  str = skip_space (str);
587 
  input_line_pointer = str;
588 
  expression (& ex);
589 
 
590 
  if (ex.X_op != O_constant)
591 
    as_bad (_("constant value required"));
592 
 
593 
  if (ex.X_add_number > max || ex.X_add_number < 0)
594 
    as_bad (_("number must be positive and less than %d"), max + 1);
595 
 
596 
  return ex.X_add_number;
597 
}
598 
 
599 
/* Parse for ldd/std offset.  */
600 
 
601 
static void
602 
avr_offset_expression (expressionS *exp)
603 
{
604 
  char *str = input_line_pointer;
605 
  char *tmp;
606 
  char op[8];
607 
 
608 
  tmp = str;
609 
  str = extract_word (str, op, sizeof (op));
610 
 
611 
  input_line_pointer = tmp;
612 
  expression (exp);
613 
 
614 
  /* Warn about expressions that fail to use lo8 ().  */
615 
  if (exp->X_op == O_constant)
616 
    {
617 
      int x = exp->X_add_number;
618 
 
619 
      if (x < -255 || x > 255)
620 
        as_warn (_("constant out of 8-bit range: %d"), x);
621 
    }
622 
}
623 
 
624 
/* Parse ordinary expression.  */
625 
 
626 
static char *
627 
parse_exp (char *s, expressionS *op)
628 
{
629 
  input_line_pointer = s;
630 
  expression (op);
631 
  if (op->X_op == O_absent)
632 
    as_bad (_("missing operand"));
633 
  return input_line_pointer;
634 
}
635 
 
636 
/* Parse special expressions (needed for LDI command):
637 
   xx8 (address)
638 
   xx8 (-address)
639 
   pm_xx8 (address)
640 
   pm_xx8 (-address)
641 
   where xx is: hh, hi, lo.  */
642 
 
643 
static bfd_reloc_code_real_type
644 
avr_ldi_expression (expressionS *exp)
645 
{
646 
  char *str = input_line_pointer;
647 
  char *tmp;
648 
  char op[8];
649 
  int mod;
650 
  int linker_stubs_should_be_generated = 0;
651 
 
652 
  tmp = str;
653 
 
654 
  str = extract_word (str, op, sizeof (op));
655 
 
656 
  if (op[0])
657 
    {
658 
      mod_index m;
659 
 
660 
      m.ptr = hash_find (avr_mod_hash, op);
661 
      mod = m.index;
662 
 
663 
      if (mod)
664 
        {
665 
          int closes = 0;
666 
 
667 
          mod -= 10;
668 
          str = skip_space (str);
669 
 
670 
          if (*str == '(')
671 
            {
672 
              bfd_reloc_code_real_type  reloc_to_return;
673 
              int neg_p = 0;
674 
 
675 
              ++str;
676 
 
677 
              if (strncmp ("pm(", str, 3) == 0
678 
                  || strncmp ("gs(",str,3) == 0
679 
                  || strncmp ("-(gs(",str,5) == 0
680 
                  || strncmp ("-(pm(", str, 5) == 0)
681 
                {
682 
                  if (HAVE_PM_P (mod))
683 
                    {
684 
                      ++mod;
685 
                      ++closes;
686 
                    }
687 
                  else
688 
                    as_bad (_("illegal expression"));
689 
 
690 
                  if (str[0] == 'g' || str[2] == 'g')
691 
                    linker_stubs_should_be_generated = 1;
692 
 
693 
                  if (*str == '-')
694 
                    {
695 
                      neg_p = 1;
696 
                      ++closes;
697 
                      str += 5;
698 
                    }
699 
                  else
700 
                    str += 3;
701 
                }
702 
 
703 
              if (*str == '-' && *(str + 1) == '(')
704 
                {
705 
                  neg_p ^= 1;
706 
                  ++closes;
707 
                  str += 2;
708 
                }
709 
 
710 
              input_line_pointer = str;
711 
              expression (exp);
712 
 
713 
              do
714 
                {
715 
                  if (*input_line_pointer != ')')
716 
                    {
717 
                      as_bad (_("`)' required"));
718 
                      break;
719 
                    }
720 
                  input_line_pointer++;
721 
                }
722 
              while (closes--);
723 
 
724 
              reloc_to_return =
725 
                neg_p ? EXP_MOD_NEG_RELOC (mod) : EXP_MOD_RELOC (mod);
726 
              if (linker_stubs_should_be_generated)
727 
                {
728 
                  switch (reloc_to_return)
729 
                    {
730 
                    case BFD_RELOC_AVR_LO8_LDI_PM:
731 
                      reloc_to_return = BFD_RELOC_AVR_LO8_LDI_GS;
732 
                      break;
733 
                    case BFD_RELOC_AVR_HI8_LDI_PM:
734 
                      reloc_to_return = BFD_RELOC_AVR_HI8_LDI_GS;
735 
                      break;
736 
 
737 
                    default:
738 
                      /* PR 5523: Do not generate a warning here,
739 
                         legitimate code can trigger this case.  */
740 
                      break;
741 
                    }
742 
                }
743 
              return reloc_to_return;
744 
            }
745 
        }
746 
    }
747 
 
748 
  input_line_pointer = tmp;
749 
  expression (exp);
750 
 
751 
  /* Warn about expressions that fail to use lo8 ().  */
752 
  if (exp->X_op == O_constant)
753 
    {
754 
      int x = exp->X_add_number;
755 
 
756 
      if (x < -255 || x > 255)
757 
        as_warn (_("constant out of 8-bit range: %d"), x);
758 
    }
759 
 
760 
  return BFD_RELOC_AVR_LDI;
761 
}
762 
 
763 
/* Parse one instruction operand.
764 
   Return operand bitmask.  Also fixups can be generated.  */
765 
 
766 
static unsigned int
767 
avr_operand (struct avr_opcodes_s *opcode,
768 
             int where,
769 
             char *op,
770 
             char **line)
771 
{
772 
  expressionS op_expr;
773 
  unsigned int op_mask = 0;
774 
  char *str = skip_space (*line);
775 
 
776 
  switch (*op)
777 
    {
778 
      /* Any register operand.  */
779 
    case 'w':
780 
    case 'd':
781 
    case 'r':
782 
    case 'a':
783 
    case 'v':
784 
      if (*str == 'r' || *str == 'R')
785 
        {
786 
          char r_name[20];
787 
 
788 
          str = extract_word (str, r_name, sizeof (r_name));
789 
          op_mask = 0xff;
790 
          if (ISDIGIT (r_name[1]))
791 
            {
792 
              if (r_name[2] == '\0')
793 
                op_mask = r_name[1] - '0';
794 
              else if (r_name[1] != '0'
795 
                       && ISDIGIT (r_name[2])
796 
                       && r_name[3] == '\0')
797 
                op_mask = (r_name[1] - '0') * 10 + r_name[2] - '0';
798 
            }
799 
        }
800 
      else
801 
        {
802 
          op_mask = avr_get_constant (str, 31);
803 
          str = input_line_pointer;
804 
        }
805 
 
806 
      if (op_mask <= 31)
807 
        {
808 
          switch (*op)
809 
            {
810 
            case 'a':
811 
              if (op_mask < 16 || op_mask > 23)
812 
                as_bad (_("register r16-r23 required"));
813 
              op_mask -= 16;
814 
              break;
815 
 
816 
            case 'd':
817 
              if (op_mask < 16)
818 
                as_bad (_("register number above 15 required"));
819 
              op_mask -= 16;
820 
              break;
821 
 
822 
            case 'v':
823 
              if (op_mask & 1)
824 
                as_bad (_("even register number required"));
825 
              op_mask >>= 1;
826 
              break;
827 
 
828 
            case 'w':
829 
              if ((op_mask & 1) || op_mask < 24)
830 
                as_bad (_("register r24, r26, r28 or r30 required"));
831 
              op_mask = (op_mask - 24) >> 1;
832 
              break;
833 
            }
834 
          break;
835 
        }
836 
      as_bad (_("register name or number from 0 to 31 required"));
837 
      break;
838 
 
839 
    case 'e':
840 
      {
841 
        char c;
842 
 
843 
        if (*str == '-')
844 
          {
845 
            str = skip_space (str + 1);
846 
            op_mask = 0x1002;
847 
          }
848 
        c = TOLOWER (*str);
849 
        if (c == 'x')
850 
          op_mask |= 0x100c;
851 
        else if (c == 'y')
852 
          op_mask |= 0x8;
853 
        else if (c != 'z')
854 
          as_bad (_("pointer register (X, Y or Z) required"));
855 
 
856 
        str = skip_space (str + 1);
857 
        if (*str == '+')
858 
          {
859 
            ++str;
860 
            if (op_mask & 2)
861 
              as_bad (_("cannot both predecrement and postincrement"));
862 
            op_mask |= 0x1001;
863 
          }
864 
 
865 
        /* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
866 
           registers, no predecrement, no postincrement.  */
867 
        if (!avr_opt.all_opcodes && (op_mask & 0x100F)
868 
            && !(avr_mcu->isa & AVR_ISA_SRAM))
869 
          as_bad (_("addressing mode not supported"));
870 
      }
871 
      break;
872 
 
873 
    case 'z':
874 
      if (*str == '-')
875 
        as_bad (_("can't predecrement"));
876 
 
877 
      if (! (*str == 'z' || *str == 'Z'))
878 
        as_bad (_("pointer register Z required"));
879 
 
880 
      str = skip_space (str + 1);
881 
 
882 
      if (*str == '+')
883 
        {
884 
          ++str;
885 
          char *s;
886 
          for (s = opcode->opcode; *s; ++s)
887 
            {
888 
              if (*s == '+')
889 
                op_mask |= (1 << (15 - (s - opcode->opcode)));
890 
            }
891 
        }
892 
 
893 
      /* attiny26 can do "lpm" and "lpm r,Z" but not "lpm r,Z+".  */
894 
      if (!avr_opt.all_opcodes
895 
          && (op_mask & 0x0001)
896 
          && !(avr_mcu->isa & AVR_ISA_MOVW))
897 
        as_bad (_("postincrement not supported"));
898 
      break;
899 
 
900 
    case 'b':
901 
      {
902 
        char c = TOLOWER (*str++);
903 
 
904 
        if (c == 'y')
905 
          op_mask |= 0x8;
906 
        else if (c != 'z')
907 
          as_bad (_("pointer register (Y or Z) required"));
908 
        str = skip_space (str);
909 
        if (*str++ == '+')
910 
          {
911 
            input_line_pointer = str;
912 
            avr_offset_expression (& op_expr);
913 
            str = input_line_pointer;
914 
            fix_new_exp (frag_now, where, 3,
915 
                         &op_expr, FALSE, BFD_RELOC_AVR_6);
916 
          }
917 
      }
918 
      break;
919 
 
920 
    case 'h':
921 
      str = parse_exp (str, &op_expr);
922 
      fix_new_exp (frag_now, where, opcode->insn_size * 2,
923 
                   &op_expr, FALSE, BFD_RELOC_AVR_CALL);
924 
      break;
925 
 
926 
    case 'L':
927 
      str = parse_exp (str, &op_expr);
928 
      fix_new_exp (frag_now, where, opcode->insn_size * 2,
929 
                   &op_expr, TRUE, BFD_RELOC_AVR_13_PCREL);
930 
      break;
931 
 
932 
    case 'l':
933 
      str = parse_exp (str, &op_expr);
934 
      fix_new_exp (frag_now, where, opcode->insn_size * 2,
935 
                   &op_expr, TRUE, BFD_RELOC_AVR_7_PCREL);
936 
      break;
937 
 
938 
    case 'i':
939 
      str = parse_exp (str, &op_expr);
940 
      fix_new_exp (frag_now, where + 2, opcode->insn_size * 2,
941 
                   &op_expr, FALSE, BFD_RELOC_16);
942 
      break;
943 
 
944 
    case 'M':
945 
      {
946 
        bfd_reloc_code_real_type r_type;
947 
 
948 
        input_line_pointer = str;
949 
        r_type = avr_ldi_expression (&op_expr);
950 
        str = input_line_pointer;
951 
        fix_new_exp (frag_now, where, 3,
952 
                     &op_expr, FALSE, r_type);
953 
      }
954 
      break;
955 
 
956 
    case 'n':
957 
      {
958 
        unsigned int x;
959 
 
960 
        x = ~avr_get_constant (str, 255);
961 
        str = input_line_pointer;
962 
        op_mask |= (x & 0xf) | ((x << 4) & 0xf00);
963 
      }
964 
      break;
965 
 
966 
    case 'K':
967 
      input_line_pointer = str;
968 
      avr_offset_expression (& op_expr);
969 
      str = input_line_pointer;
970 
      fix_new_exp (frag_now, where, 3,
971 
                   & op_expr, FALSE, BFD_RELOC_AVR_6_ADIW);
972 
      break;
973 
 
974 
    case 'S':
975 
    case 's':
976 
      {
977 
        unsigned int x;
978 
 
979 
        x = avr_get_constant (str, 7);
980 
        str = input_line_pointer;
981 
        if (*op == 'S')
982 
          x <<= 4;
983 
        op_mask |= x;
984 
      }
985 
      break;
986 
 
987 
    case 'P':
988 
      {
989 
        unsigned int x;
990 
 
991 
        x = avr_get_constant (str, 63);
992 
        str = input_line_pointer;
993 
        op_mask |= (x & 0xf) | ((x & 0x30) << 5);
994 
      }
995 
      break;
996 
 
997 
    case 'p':
998 
      {
999 
        unsigned int x;
1000 
 
1001 
        x = avr_get_constant (str, 31);
1002 
        str = input_line_pointer;
1003 
        op_mask |= x << 3;
1004 
      }
1005 
      break;
1006 
 
1007 
    case 'E':
1008 
      {
1009 
        unsigned int x;
1010 
 
1011 
        x = avr_get_constant (str, 15);
1012 
        str = input_line_pointer;
1013 
        op_mask |= (x << 4);
1014 
      }
1015 
      break;
1016 
 
1017 
    case '?':
1018 
      break;
1019 
 
1020 
    default:
1021 
      as_bad (_("unknown constraint `%c'"), *op);
1022 
    }
1023 
 
1024 
  *line = str;
1025 
  return op_mask;
1026 
}
1027 
 
1028 
/* Parse instruction operands.
1029 
   Return binary opcode.  */
1030 
 
1031 
static unsigned int
1032 
avr_operands (struct avr_opcodes_s *opcode, char **line)
1033 
{
1034 
  char *op = opcode->constraints;
1035 
  unsigned int bin = opcode->bin_opcode;
1036 
  char *frag = frag_more (opcode->insn_size * 2);
1037 
  char *str = *line;
1038 
  int where = frag - frag_now->fr_literal;
1039 
  static unsigned int prev = 0;  /* Previous opcode.  */
1040 
 
1041 
  /* Opcode have operands.  */
1042 
  if (*op)
1043 
    {
1044 
      unsigned int reg1 = 0;
1045 
      unsigned int reg2 = 0;
1046 
      int reg1_present = 0;
1047 
      int reg2_present = 0;
1048 
 
1049 
      /* Parse first operand.  */
1050 
      if (REGISTER_P (*op))
1051 
        reg1_present = 1;
1052 
      reg1 = avr_operand (opcode, where, op, &str);
1053 
      ++op;
1054 
 
1055 
      /* Parse second operand.  */
1056 
      if (*op)
1057 
        {
1058 
          if (*op == ',')
1059 
            ++op;
1060 
 
1061 
          if (*op == '=')
1062 
            {
1063 
              reg2 = reg1;
1064 
              reg2_present = 1;
1065 
            }
1066 
          else
1067 
            {
1068 
              if (REGISTER_P (*op))
1069 
                reg2_present = 1;
1070 
 
1071 
              str = skip_space (str);
1072 
              if (*str++ != ',')
1073 
                as_bad (_("`,' required"));
1074 
              str = skip_space (str);
1075 
 
1076 
              reg2 = avr_operand (opcode, where, op, &str);
1077 
            }
1078 
 
1079 
          if (reg1_present && reg2_present)
1080 
            reg2 = (reg2 & 0xf) | ((reg2 << 5) & 0x200);
1081 
          else if (reg2_present)
1082 
            reg2 <<= 4;
1083 
        }
1084 
      if (reg1_present)
1085 
        reg1 <<= 4;
1086 
      bin |= reg1 | reg2;
1087 
    }
1088 
 
1089 
  /* Detect undefined combinations (like ld r31,Z+).  */
1090 
  if (!avr_opt.all_opcodes && AVR_UNDEF_P (bin))
1091 
    as_warn (_("undefined combination of operands"));
1092 
 
1093 
  if (opcode->insn_size == 2)
1094 
    {
1095 
      /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs
1096 
         (AVR core bug, fixed in the newer devices).  */
1097 
      if (!(avr_opt.no_skip_bug ||
1098 
            (avr_mcu->isa & (AVR_ISA_MUL | AVR_ISA_MOVW)))
1099 
          && AVR_SKIP_P (prev))
1100 
        as_warn (_("skipping two-word instruction"));
1101 
 
1102 
      bfd_putl32 ((bfd_vma) bin, frag);
1103 
    }
1104 
  else
1105 
    bfd_putl16 ((bfd_vma) bin, frag);
1106 
 
1107 
  prev = bin;
1108 
  *line = str;
1109 
  return bin;
1110 
}
1111 
 
1112 
/* GAS will call this function for each section at the end of the assembly,
1113 
   to permit the CPU backend to adjust the alignment of a section.  */
1114 
 
1115 
valueT
1116 
md_section_align (asection *seg, valueT addr)
1117 
{
1118 
  int align = bfd_get_section_alignment (stdoutput, seg);
1119 
  return ((addr + (1 << align) - 1) & (-1 << align));
1120 
}
1121 
 
1122 
/* If you define this macro, it should return the offset between the
1123 
   address of a PC relative fixup and the position from which the PC
1124 
   relative adjustment should be made.  On many processors, the base
1125 
   of a PC relative instruction is the next instruction, so this
1126 
   macro would return the length of an instruction.  */
1127 
 
1128 
long
1129 
md_pcrel_from_section (fixS *fixp, segT sec)
1130 
{
1131 
  if (fixp->fx_addsy != (symbolS *) NULL
1132 
      && (!S_IS_DEFINED (fixp->fx_addsy)
1133 
          || (S_GET_SEGMENT (fixp->fx_addsy) != sec)))
1134 
    return 0;
1135 
 
1136 
  return fixp->fx_frag->fr_address + fixp->fx_where;
1137 
}
1138 
 
1139 
/* GAS will call this for each fixup.  It should store the correct
1140 
   value in the object file.  */
1141 
 
1142 
void
1143 
md_apply_fix (fixS *fixP, valueT * valP, segT seg)
1144 
{
1145 
  unsigned char *where;
1146 
  unsigned long insn;
1147 
  long value = *valP;
1148 
 
1149 
  if (fixP->fx_addsy == (symbolS *) NULL)
1150 
    fixP->fx_done = 1;
1151 
 
1152 
  else if (fixP->fx_pcrel)
1153 
    {
1154 
      segT s = S_GET_SEGMENT (fixP->fx_addsy);
1155 
 
1156 
      if (s == seg || s == absolute_section)
1157 
        {
1158 
          value += S_GET_VALUE (fixP->fx_addsy);
1159 
          fixP->fx_done = 1;
1160 
        }
1161 
    }
1162 
 
1163 
  /* We don't actually support subtracting a symbol.  */
1164 
  if (fixP->fx_subsy != (symbolS *) NULL)
1165 
    as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
1166 
 
1167 
  switch (fixP->fx_r_type)
1168 
    {
1169 
    default:
1170 
      fixP->fx_no_overflow = 1;
1171 
      break;
1172 
    case BFD_RELOC_AVR_7_PCREL:
1173 
    case BFD_RELOC_AVR_13_PCREL:
1174 
    case BFD_RELOC_32:
1175 
    case BFD_RELOC_16:
1176 
    case BFD_RELOC_AVR_CALL:
1177 
      break;
1178 
    }
1179 
 
1180 
  if (fixP->fx_done)
1181 
    {
1182 
      /* Fetch the instruction, insert the fully resolved operand
1183 
         value, and stuff the instruction back again.  */
1184 
      where = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where;
1185 
      insn = bfd_getl16 (where);
1186 
 
1187 
      switch (fixP->fx_r_type)
1188 
        {
1189 
        case BFD_RELOC_AVR_7_PCREL:
1190 
          if (value & 1)
1191 
            as_bad_where (fixP->fx_file, fixP->fx_line,
1192 
                          _("odd address operand: %ld"), value);
1193 
 
1194 
          /* Instruction addresses are always right-shifted by 1.  */
1195 
          value >>= 1;
1196 
          --value;                      /* Correct PC.  */
1197 
 
1198 
          if (value < -64 || value > 63)
1199 
            as_bad_where (fixP->fx_file, fixP->fx_line,
1200 
                          _("operand out of range: %ld"), value);
1201 
          value = (value << 3) & 0x3f8;
1202 
          bfd_putl16 ((bfd_vma) (value | insn), where);
1203 
          break;
1204 
 
1205 
        case BFD_RELOC_AVR_13_PCREL:
1206 
          if (value & 1)
1207 
            as_bad_where (fixP->fx_file, fixP->fx_line,
1208 
                          _("odd address operand: %ld"), value);
1209 
 
1210 
          /* Instruction addresses are always right-shifted by 1.  */
1211 
          value >>= 1;
1212 
          --value;                      /* Correct PC.  */
1213 
 
1214 
          if (value < -2048 || value > 2047)
1215 
            {
1216 
              /* No wrap for devices with >8K of program memory.  */
1217 
              if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap)
1218 
                as_bad_where (fixP->fx_file, fixP->fx_line,
1219 
                              _("operand out of range: %ld"), value);
1220 
            }
1221 
 
1222 
          value &= 0xfff;
1223 
          bfd_putl16 ((bfd_vma) (value | insn), where);
1224 
          break;
1225 
 
1226 
        case BFD_RELOC_32:
1227 
          bfd_putl16 ((bfd_vma) value, where);
1228 
          break;
1229 
 
1230 
        case BFD_RELOC_16:
1231 
          bfd_putl16 ((bfd_vma) value, where);
1232 
          break;
1233 
 
1234 
        case BFD_RELOC_8:
1235 
          if (value > 255 || value < -128)
1236 
            as_warn_where (fixP->fx_file, fixP->fx_line,
1237 
                           _("operand out of range: %ld"), value);
1238 
          *where = value;
1239 
          break;
1240 
 
1241 
        case BFD_RELOC_AVR_16_PM:
1242 
          bfd_putl16 ((bfd_vma) (value >> 1), where);
1243 
          break;
1244 
 
1245 
        case BFD_RELOC_AVR_LDI:
1246 
          if (value > 255)
1247 
            as_bad_where (fixP->fx_file, fixP->fx_line,
1248 
                          _("operand out of range: %ld"), value);
1249 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
1250 
          break;
1251 
 
1252 
        case BFD_RELOC_AVR_6:
1253 
          if ((value > 63) || (value < 0))
1254 
            as_bad_where (fixP->fx_file, fixP->fx_line,
1255 
                          _("operand out of range: %ld"), value);
1256 
          bfd_putl16 ((bfd_vma) insn | ((value & 7) | ((value & (3 << 3)) << 7) | ((value & (1 << 5)) << 8)), where);
1257 
          break;
1258 
 
1259 
        case BFD_RELOC_AVR_6_ADIW:
1260 
          if ((value > 63) || (value < 0))
1261 
            as_bad_where (fixP->fx_file, fixP->fx_line,
1262 
                          _("operand out of range: %ld"), value);
1263 
          bfd_putl16 ((bfd_vma) insn | (value & 0xf) | ((value & 0x30) << 2), where);
1264 
          break;
1265 
 
1266 
        case BFD_RELOC_AVR_LO8_LDI:
1267 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value), where);
1268 
          break;
1269 
 
1270 
        case BFD_RELOC_AVR_HI8_LDI:
1271 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 8), where);
1272 
          break;
1273 
 
1274 
        case BFD_RELOC_AVR_MS8_LDI:
1275 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 24), where);
1276 
          break;
1277 
 
1278 
        case BFD_RELOC_AVR_HH8_LDI:
1279 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 16), where);
1280 
          break;
1281 
 
1282 
        case BFD_RELOC_AVR_LO8_LDI_NEG:
1283 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value), where);
1284 
          break;
1285 
 
1286 
        case BFD_RELOC_AVR_HI8_LDI_NEG:
1287 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 8), where);
1288 
          break;
1289 
 
1290 
        case BFD_RELOC_AVR_MS8_LDI_NEG:
1291 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 24), where);
1292 
          break;
1293 
 
1294 
        case BFD_RELOC_AVR_HH8_LDI_NEG:
1295 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 16), where);
1296 
          break;
1297 
 
1298 
        case BFD_RELOC_AVR_LO8_LDI_PM:
1299 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 1), where);
1300 
          break;
1301 
 
1302 
        case BFD_RELOC_AVR_HI8_LDI_PM:
1303 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 9), where);
1304 
          break;
1305 
 
1306 
        case BFD_RELOC_AVR_HH8_LDI_PM:
1307 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (value >> 17), where);
1308 
          break;
1309 
 
1310 
        case BFD_RELOC_AVR_LO8_LDI_PM_NEG:
1311 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 1), where);
1312 
          break;
1313 
 
1314 
        case BFD_RELOC_AVR_HI8_LDI_PM_NEG:
1315 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 9), where);
1316 
          break;
1317 
 
1318 
        case BFD_RELOC_AVR_HH8_LDI_PM_NEG:
1319 
          bfd_putl16 ((bfd_vma) insn | LDI_IMMEDIATE (-value >> 17), where);
1320 
          break;
1321 
 
1322 
        case BFD_RELOC_AVR_CALL:
1323 
          {
1324 
            unsigned long x;
1325 
 
1326 
            x = bfd_getl16 (where);
1327 
            if (value & 1)
1328 
              as_bad_where (fixP->fx_file, fixP->fx_line,
1329 
                            _("odd address operand: %ld"), value);
1330 
            value >>= 1;
1331 
            x |= ((value & 0x10000) | ((value << 3) & 0x1f00000)) >> 16;
1332 
            bfd_putl16 ((bfd_vma) x, where);
1333 
            bfd_putl16 ((bfd_vma) (value & 0xffff), where + 2);
1334 
          }
1335 
          break;
1336 
 
1337 
        default:
1338 
          as_fatal (_("line %d: unknown relocation type: 0x%x"),
1339 
                    fixP->fx_line, fixP->fx_r_type);
1340 
          break;
1341 
        }
1342 
    }
1343 
  else
1344 
    {
1345 
      switch ((int) fixP->fx_r_type)
1346 
        {
1347 
        case -BFD_RELOC_AVR_HI8_LDI_NEG:
1348 
        case -BFD_RELOC_AVR_HI8_LDI:
1349 
        case -BFD_RELOC_AVR_LO8_LDI_NEG:
1350 
        case -BFD_RELOC_AVR_LO8_LDI:
1351 
          as_bad_where (fixP->fx_file, fixP->fx_line,
1352 
                        _("only constant expression allowed"));
1353 
          fixP->fx_done = 1;
1354 
          break;
1355 
        default:
1356 
          break;
1357 
        }
1358 
    }
1359 
}
1360 
 
1361 
/* GAS will call this to generate a reloc, passing the resulting reloc
1362 
   to `bfd_install_relocation'.  This currently works poorly, as
1363 
   `bfd_install_relocation' often does the wrong thing, and instances of
1364 
   `tc_gen_reloc' have been written to work around the problems, which
1365 
   in turns makes it difficult to fix `bfd_install_relocation'.  */
1366 
 
1367 
/* If while processing a fixup, a reloc really needs to be created
1368 
   then it is done here.  */
1369 
 
1370 
arelent *
1371 
tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED,
1372 
              fixS *fixp)
1373 
{
1374 
  arelent *reloc;
1375 
 
1376 
  if (fixp->fx_addsy && fixp->fx_subsy)
1377 
    {
1378 
      long value = 0;
1379 
 
1380 
      if ((S_GET_SEGMENT (fixp->fx_addsy) != S_GET_SEGMENT (fixp->fx_subsy))
1381 
          || S_GET_SEGMENT (fixp->fx_addsy) == undefined_section)
1382 
        {
1383 
          as_bad_where (fixp->fx_file, fixp->fx_line,
1384 
              "Difference of symbols in different sections is not supported");
1385 
          return NULL;
1386 
        }
1387 
 
1388 
      /* We are dealing with two symbols defined in the same section.
1389 
         Let us fix-up them here.  */
1390 
      value += S_GET_VALUE (fixp->fx_addsy);
1391 
      value -= S_GET_VALUE (fixp->fx_subsy);
1392 
 
1393 
      /* When fx_addsy and fx_subsy both are zero, md_apply_fix
1394 
         only takes it's second operands for the fixup value.  */
1395 
      fixp->fx_addsy = NULL;
1396 
      fixp->fx_subsy = NULL;
1397 
      md_apply_fix (fixp, (valueT *) &value, NULL);
1398 
 
1399 
      return NULL;
1400 
    }
1401 
 
1402 
  reloc = xmalloc (sizeof (arelent));
1403 
 
1404 
  reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
1405 
  *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1406 
 
1407 
  reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1408 
  reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1409 
  if (reloc->howto == (reloc_howto_type *) NULL)
1410 
    {
1411 
      as_bad_where (fixp->fx_file, fixp->fx_line,
1412 
                    _("reloc %d not supported by object file format"),
1413 
                    (int) fixp->fx_r_type);
1414 
      return NULL;
1415 
    }
1416 
 
1417 
  if (fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1418 
      || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1419 
    reloc->address = fixp->fx_offset;
1420 
 
1421 
  reloc->addend = fixp->fx_offset;
1422 
 
1423 
  return reloc;
1424 
}
1425 
 
1426 
void
1427 
md_assemble (char *str)
1428 
{
1429 
  struct avr_opcodes_s *opcode;
1430 
  char op[11];
1431 
 
1432 
  str = skip_space (extract_word (str, op, sizeof (op)));
1433 
 
1434 
  if (!op[0])
1435 
    as_bad (_("can't find opcode "));
1436 
 
1437 
  opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op);
1438 
 
1439 
  if (opcode == NULL)
1440 
    {
1441 
      as_bad (_("unknown opcode `%s'"), op);
1442 
      return;
1443 
    }
1444 
 
1445 
  /* Special case for opcodes with optional operands (lpm, elpm) -
1446 
     version with operands exists in avr_opcodes[] in the next entry.  */
1447 
 
1448 
  if (*str && *opcode->constraints == '?')
1449 
    ++opcode;
1450 
 
1451 
  if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa)
1452 
    as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
1453 
 
1454 
  dwarf2_emit_insn (0);
1455 
 
1456 
  /* We used to set input_line_pointer to the result of get_operands,
1457 
     but that is wrong.  Our caller assumes we don't change it.  */
1458 
  {
1459 
    char *t = input_line_pointer;
1460 
 
1461 
    avr_operands (opcode, &str);
1462 
    if (*skip_space (str))
1463 
      as_bad (_("garbage at end of line"));
1464 
    input_line_pointer = t;
1465 
  }
1466 
}
1467 
 
1468 
/* Flag to pass `pm' mode between `avr_parse_cons_expression' and
1469 
   `avr_cons_fix_new'.  */
1470 
static int exp_mod_pm = 0;
1471 
 
1472 
/* Parse special CONS expression: pm (expression)
1473 
   or alternatively: gs (expression).
1474 
   These are used for addressing program memory.
1475 
   Relocation: BFD_RELOC_AVR_16_PM.  */
1476 
 
1477 
void
1478 
avr_parse_cons_expression (expressionS *exp, int nbytes)
1479 
{
1480 
  char *tmp;
1481 
 
1482 
  exp_mod_pm = 0;
1483 
 
1484 
  tmp = input_line_pointer = skip_space (input_line_pointer);
1485 
 
1486 
  if (nbytes == 2)
1487 
    {
1488 
      char *pm_name1 = "pm";
1489 
      char *pm_name2 = "gs";
1490 
      int len = strlen (pm_name1);
1491 
      /* len must be the same for both pm identifiers.  */
1492 
 
1493 
      if (strncasecmp (input_line_pointer, pm_name1, len) == 0
1494 
          || strncasecmp (input_line_pointer, pm_name2, len) == 0)
1495 
        {
1496 
          input_line_pointer = skip_space (input_line_pointer + len);
1497 
 
1498 
          if (*input_line_pointer == '(')
1499 
            {
1500 
              input_line_pointer = skip_space (input_line_pointer + 1);
1501 
              exp_mod_pm = 1;
1502 
              expression (exp);
1503 
 
1504 
              if (*input_line_pointer == ')')
1505 
                ++input_line_pointer;
1506 
              else
1507 
                {
1508 
                  as_bad (_("`)' required"));
1509 
                  exp_mod_pm = 0;
1510 
                }
1511 
 
1512 
              return;
1513 
            }
1514 
 
1515 
          input_line_pointer = tmp;
1516 
        }
1517 
    }
1518 
 
1519 
  expression (exp);
1520 
}
1521 
 
1522 
void
1523 
avr_cons_fix_new (fragS *frag,
1524 
                  int where,
1525 
                  int nbytes,
1526 
                  expressionS *exp)
1527 
{
1528 
  if (exp_mod_pm == 0)
1529 
    {
1530 
      if (nbytes == 1)
1531 
        fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_8);
1532 
      else if (nbytes == 2)
1533 
        fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_16);
1534 
      else if (nbytes == 4)
1535 
        fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_32);
1536 
      else
1537 
        as_bad (_("illegal %srelocation size: %d"), "", nbytes);
1538 
    }
1539 
  else
1540 
    {
1541 
      if (nbytes == 2)
1542 
        fix_new_exp (frag, where, nbytes, exp, FALSE, BFD_RELOC_AVR_16_PM);
1543 
      else
1544 
        as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes);
1545 
      exp_mod_pm = 0;
1546 
    }
1547 
}
1548 
 
1549 
void
1550 
tc_cfi_frame_initial_instructions (void)
1551 
{
1552 
  /* AVR6 pushes 3 bytes for calls.  */
1553 
  int return_size = (avr_mcu->mach == bfd_mach_avr6 ? 3 : 2);
1554 
 
1555 
  /* The CFA is the caller's stack location before the call insn.  */
1556 
  /* Note that the stack pointer is dwarf register number 32.  */
1557 
  cfi_add_CFA_def_cfa (32, return_size);
1558 
 
1559 
  /* Note that AVR consistently uses post-decrement, which means that things
1560 
     do not line up the same way as for targers that use pre-decrement.  */
1561 
  cfi_add_CFA_offset (DWARF2_DEFAULT_RETURN_COLUMN, 1-return_size);
1562 
}

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