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a86481d3 DB |
1 | /* Assembler interface for targets using CGEN. -*- C -*- |
2 | CGEN: Cpu tools GENerator | |
3 | ||
4 | THIS FILE IS USED TO GENERATE fr30-asm.c. | |
5 | ||
6 | Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. | |
7 | ||
8 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software Foundation, Inc., | |
22 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
23 | ||
24 | #include "sysdep.h" | |
25 | #include <ctype.h> | |
26 | #include <stdio.h> | |
27 | #include "ansidecl.h" | |
28 | #include "bfd.h" | |
29 | #include "symcat.h" | |
30 | #include "fr30-opc.h" | |
31 | #include "opintl.h" | |
32 | ||
33 | #undef min | |
34 | #define min(a,b) ((a) < (b) ? (a) : (b)) | |
35 | #undef max | |
36 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
37 | ||
38 | #undef INLINE | |
39 | #ifdef __GNUC__ | |
40 | #define INLINE __inline__ | |
41 | #else | |
42 | #define INLINE | |
43 | #endif | |
44 | ||
45 | static const char * insert_normal | |
46 | PARAMS ((CGEN_OPCODE_DESC, long, unsigned int, int, int, int, | |
47 | CGEN_INSN_BYTES_PTR)); | |
48 | static const char * parse_insn_normal | |
49 | PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *, | |
50 | const char **, CGEN_FIELDS *)); | |
51 | static const char * insert_insn_normal | |
52 | PARAMS ((CGEN_OPCODE_DESC, const CGEN_INSN *, | |
53 | CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma)); | |
54 | \f | |
55 | /* -- assembler routines inserted here */ | |
56 | ||
57 | /* Main entry point for operand parsing. | |
58 | ||
59 | This function is basically just a big switch statement. Earlier versions | |
60 | used tables to look up the function to use, but | |
61 | - if the table contains both assembler and disassembler functions then | |
62 | the disassembler contains much of the assembler and vice-versa, | |
63 | - there's a lot of inlining possibilities as things grow, | |
64 | - using a switch statement avoids the function call overhead. | |
65 | ||
66 | This function could be moved into `parse_insn_normal', but keeping it | |
67 | separate makes clear the interface between `parse_insn_normal' and each of | |
68 | the handlers. | |
69 | */ | |
70 | ||
71 | const char * | |
72 | fr30_cgen_parse_operand (od, opindex, strp, fields) | |
73 | CGEN_OPCODE_DESC od; | |
74 | int opindex; | |
75 | const char ** strp; | |
76 | CGEN_FIELDS * fields; | |
77 | { | |
78 | const char * errmsg; | |
79 | ||
80 | switch (opindex) | |
81 | { | |
82 | case FR30_OPERAND_RI : | |
83 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_gr, & fields->f_Ri); | |
84 | break; | |
85 | case FR30_OPERAND_RJ : | |
86 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_gr, & fields->f_Rj); | |
87 | break; | |
7a0737c8 DB |
88 | case FR30_OPERAND_RS1 : |
89 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_dr, & fields->f_Rs1); | |
90 | break; | |
91 | case FR30_OPERAND_RS2 : | |
92 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_dr, & fields->f_Rs2); | |
93 | break; | |
6a1254af DB |
94 | case FR30_OPERAND_R13 : |
95 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_r13, & fields->f_nil); | |
96 | break; | |
97 | case FR30_OPERAND_R14 : | |
98 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_r14, & fields->f_nil); | |
99 | break; | |
100 | case FR30_OPERAND_R15 : | |
101 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_r15, & fields->f_nil); | |
102 | break; | |
103 | case FR30_OPERAND_PS : | |
104 | errmsg = cgen_parse_keyword (od, strp, & fr30_cgen_opval_h_ps, & fields->f_nil); | |
105 | break; | |
7a0737c8 DB |
106 | case FR30_OPERAND_U4 : |
107 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_U4, &fields->f_u4); | |
108 | break; | |
109 | case FR30_OPERAND_M4 : | |
110 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_M4, &fields->f_m4); | |
111 | break; | |
6a1254af DB |
112 | case FR30_OPERAND_U8 : |
113 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_U8, &fields->f_u8); | |
114 | break; | |
7a0737c8 DB |
115 | case FR30_OPERAND_I8 : |
116 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_I8, &fields->f_i8); | |
117 | break; | |
6a1254af DB |
118 | case FR30_OPERAND_UDISP6 : |
119 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_UDISP6, &fields->f_udisp6); | |
120 | break; | |
121 | case FR30_OPERAND_DISP8 : | |
122 | errmsg = cgen_parse_signed_integer (od, strp, FR30_OPERAND_DISP8, &fields->f_disp8); | |
7a0737c8 | 123 | break; |
6a1254af DB |
124 | case FR30_OPERAND_DISP9 : |
125 | errmsg = cgen_parse_signed_integer (od, strp, FR30_OPERAND_DISP9, &fields->f_disp9); | |
126 | break; | |
127 | case FR30_OPERAND_DISP10 : | |
128 | errmsg = cgen_parse_signed_integer (od, strp, FR30_OPERAND_DISP10, &fields->f_disp10); | |
7a0737c8 DB |
129 | break; |
130 | case FR30_OPERAND_S10 : | |
131 | errmsg = cgen_parse_signed_integer (od, strp, FR30_OPERAND_S10, &fields->f_s10); | |
132 | break; | |
133 | case FR30_OPERAND_U10 : | |
134 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_U10, &fields->f_u10); | |
135 | break; | |
136 | case FR30_OPERAND_DIR8 : | |
137 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_DIR8, &fields->f_dir8); | |
138 | break; | |
139 | case FR30_OPERAND_DIR9 : | |
140 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_DIR9, &fields->f_dir9); | |
141 | break; | |
142 | case FR30_OPERAND_DIR10 : | |
143 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_DIR10, &fields->f_dir10); | |
144 | break; | |
145 | case FR30_OPERAND_LABEL9 : | |
6a1254af | 146 | errmsg = cgen_parse_signed_integer (od, strp, FR30_OPERAND_LABEL9, &fields->f_rel9); |
7a0737c8 DB |
147 | break; |
148 | case FR30_OPERAND_LABEL12 : | |
6a1254af | 149 | errmsg = cgen_parse_signed_integer (od, strp, FR30_OPERAND_LABEL12, &fields->f_rel12); |
7a0737c8 DB |
150 | break; |
151 | case FR30_OPERAND_CC : | |
152 | errmsg = cgen_parse_unsigned_integer (od, strp, FR30_OPERAND_CC, &fields->f_cc); | |
153 | break; | |
a86481d3 DB |
154 | |
155 | default : | |
156 | /* xgettext:c-format */ | |
157 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
158 | abort (); | |
159 | } | |
160 | ||
161 | return errmsg; | |
162 | } | |
163 | ||
164 | /* Main entry point for operand insertion. | |
165 | ||
166 | This function is basically just a big switch statement. Earlier versions | |
167 | used tables to look up the function to use, but | |
168 | - if the table contains both assembler and disassembler functions then | |
169 | the disassembler contains much of the assembler and vice-versa, | |
170 | - there's a lot of inlining possibilities as things grow, | |
171 | - using a switch statement avoids the function call overhead. | |
172 | ||
173 | This function could be moved into `parse_insn_normal', but keeping it | |
174 | separate makes clear the interface between `parse_insn_normal' and each of | |
175 | the handlers. It's also needed by GAS to insert operands that couldn't be | |
176 | resolved during parsing. | |
177 | */ | |
178 | ||
179 | const char * | |
180 | fr30_cgen_insert_operand (od, opindex, fields, buffer, pc) | |
181 | CGEN_OPCODE_DESC od; | |
182 | int opindex; | |
183 | CGEN_FIELDS * fields; | |
184 | CGEN_INSN_BYTES_PTR buffer; | |
185 | bfd_vma pc; | |
186 | { | |
187 | const char * errmsg; | |
188 | ||
189 | switch (opindex) | |
190 | { | |
191 | case FR30_OPERAND_RI : | |
192 | errmsg = insert_normal (od, fields->f_Ri, 0|(1<<CGEN_OPERAND_UNSIGNED), 12, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
193 | break; | |
194 | case FR30_OPERAND_RJ : | |
195 | errmsg = insert_normal (od, fields->f_Rj, 0|(1<<CGEN_OPERAND_UNSIGNED), 8, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
196 | break; | |
7a0737c8 DB |
197 | case FR30_OPERAND_RS1 : |
198 | errmsg = insert_normal (od, fields->f_Rs1, 0|(1<<CGEN_OPERAND_UNSIGNED), 8, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
199 | break; | |
200 | case FR30_OPERAND_RS2 : | |
201 | errmsg = insert_normal (od, fields->f_Rs2, 0|(1<<CGEN_OPERAND_UNSIGNED), 12, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
202 | break; | |
6a1254af DB |
203 | case FR30_OPERAND_R13 : |
204 | errmsg = insert_normal (od, fields->f_nil, 0, 0, 0, CGEN_FIELDS_BITSIZE (fields), buffer); | |
205 | break; | |
206 | case FR30_OPERAND_R14 : | |
207 | errmsg = insert_normal (od, fields->f_nil, 0, 0, 0, CGEN_FIELDS_BITSIZE (fields), buffer); | |
208 | break; | |
209 | case FR30_OPERAND_R15 : | |
210 | errmsg = insert_normal (od, fields->f_nil, 0, 0, 0, CGEN_FIELDS_BITSIZE (fields), buffer); | |
211 | break; | |
212 | case FR30_OPERAND_PS : | |
213 | errmsg = insert_normal (od, fields->f_nil, 0, 0, 0, CGEN_FIELDS_BITSIZE (fields), buffer); | |
214 | break; | |
7a0737c8 DB |
215 | case FR30_OPERAND_U4 : |
216 | errmsg = insert_normal (od, fields->f_u4, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_UNSIGNED), 8, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
217 | break; | |
218 | case FR30_OPERAND_M4 : | |
219 | { | |
220 | long value = fields->f_m4; | |
221 | value = ((value) & (15)); | |
222 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_UNSIGNED), 8, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
223 | } | |
224 | break; | |
6a1254af DB |
225 | case FR30_OPERAND_U8 : |
226 | errmsg = insert_normal (od, fields->f_u8, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_UNSIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); | |
227 | break; | |
7a0737c8 DB |
228 | case FR30_OPERAND_I8 : |
229 | errmsg = insert_normal (od, fields->f_i8, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_UNSIGNED), 4, 8, CGEN_FIELDS_BITSIZE (fields), buffer); | |
230 | break; | |
6a1254af DB |
231 | case FR30_OPERAND_UDISP6 : |
232 | { | |
233 | long value = fields->f_udisp6; | |
234 | value = ((unsigned int) (value) >> (2)); | |
235 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_UNSIGNED), 8, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
236 | } | |
237 | break; | |
238 | case FR30_OPERAND_DISP8 : | |
239 | errmsg = insert_normal (od, fields->f_disp8, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_SIGNED), 4, 8, CGEN_FIELDS_BITSIZE (fields), buffer); | |
7a0737c8 | 240 | break; |
6a1254af DB |
241 | case FR30_OPERAND_DISP9 : |
242 | { | |
243 | long value = fields->f_disp9; | |
244 | value = ((int) (value) >> (1)); | |
245 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_SIGNED), 4, 8, CGEN_FIELDS_BITSIZE (fields), buffer); | |
246 | } | |
247 | break; | |
248 | case FR30_OPERAND_DISP10 : | |
249 | { | |
250 | long value = fields->f_disp10; | |
251 | value = ((int) (value) >> (2)); | |
252 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_SIGNED), 4, 8, CGEN_FIELDS_BITSIZE (fields), buffer); | |
253 | } | |
7a0737c8 DB |
254 | break; |
255 | case FR30_OPERAND_S10 : | |
256 | { | |
257 | long value = fields->f_s10; | |
6a1254af | 258 | value = ((int) (value) >> (2)); |
7a0737c8 DB |
259 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_SIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); |
260 | } | |
261 | break; | |
262 | case FR30_OPERAND_U10 : | |
263 | { | |
264 | long value = fields->f_u10; | |
6a1254af | 265 | value = ((unsigned int) (value) >> (2)); |
7a0737c8 DB |
266 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_HASH_PREFIX)|(1<<CGEN_OPERAND_UNSIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); |
267 | } | |
268 | break; | |
269 | case FR30_OPERAND_DIR8 : | |
270 | errmsg = insert_normal (od, fields->f_dir8, 0|(1<<CGEN_OPERAND_UNSIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); | |
271 | break; | |
272 | case FR30_OPERAND_DIR9 : | |
273 | { | |
274 | long value = fields->f_dir9; | |
6a1254af | 275 | value = ((unsigned int) (value) >> (1)); |
7a0737c8 DB |
276 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_UNSIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); |
277 | } | |
278 | break; | |
279 | case FR30_OPERAND_DIR10 : | |
280 | { | |
281 | long value = fields->f_dir10; | |
6a1254af | 282 | value = ((unsigned int) (value) >> (2)); |
7a0737c8 DB |
283 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_UNSIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); |
284 | } | |
285 | break; | |
286 | case FR30_OPERAND_LABEL9 : | |
287 | { | |
6a1254af DB |
288 | long value = fields->f_rel9; |
289 | value = ((int) (((value) - (((pc) & (-2))))) >> (1)); | |
7a0737c8 DB |
290 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_SIGNED), 8, 8, CGEN_FIELDS_BITSIZE (fields), buffer); |
291 | } | |
292 | break; | |
293 | case FR30_OPERAND_LABEL12 : | |
294 | { | |
6a1254af DB |
295 | long value = fields->f_rel12; |
296 | value = ((int) (((value) - (((pc) & (-2))))) >> (1)); | |
7a0737c8 DB |
297 | errmsg = insert_normal (od, value, 0|(1<<CGEN_OPERAND_SIGNED), 5, 11, CGEN_FIELDS_BITSIZE (fields), buffer); |
298 | } | |
299 | break; | |
300 | case FR30_OPERAND_CC : | |
301 | errmsg = insert_normal (od, fields->f_cc, 0|(1<<CGEN_OPERAND_UNSIGNED), 4, 4, CGEN_FIELDS_BITSIZE (fields), buffer); | |
302 | break; | |
a86481d3 DB |
303 | |
304 | default : | |
305 | /* xgettext:c-format */ | |
306 | fprintf (stderr, _("Unrecognized field %d while building insn.\n"), | |
307 | opindex); | |
308 | abort (); | |
309 | } | |
310 | ||
311 | return errmsg; | |
312 | } | |
313 | ||
314 | cgen_parse_fn * const fr30_cgen_parse_handlers[] = | |
315 | { | |
316 | 0, /* default */ | |
317 | parse_insn_normal, | |
318 | }; | |
319 | ||
320 | cgen_insert_fn * const fr30_cgen_insert_handlers[] = | |
321 | { | |
322 | 0, /* default */ | |
323 | insert_insn_normal, | |
324 | }; | |
325 | ||
326 | void | |
327 | fr30_cgen_init_asm (od) | |
328 | CGEN_OPCODE_DESC od; | |
329 | { | |
330 | } | |
331 | ||
332 | \f | |
333 | #if ! CGEN_INT_INSN_P | |
334 | ||
335 | /* Subroutine of insert_normal. */ | |
336 | ||
337 | static INLINE void | |
338 | insert_1 (od, value, start, length, word_length, bufp) | |
339 | CGEN_OPCODE_DESC od; | |
340 | unsigned long value; | |
341 | int start,length,word_length; | |
342 | unsigned char *bufp; | |
343 | { | |
344 | unsigned long x,mask; | |
345 | int shift; | |
346 | int big_p = CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG; | |
347 | ||
348 | switch (word_length) | |
349 | { | |
350 | case 8: | |
351 | x = *bufp; | |
352 | break; | |
353 | case 16: | |
354 | if (big_p) | |
355 | x = bfd_getb16 (bufp); | |
356 | else | |
357 | x = bfd_getl16 (bufp); | |
358 | break; | |
359 | case 24: | |
360 | /* ??? This may need reworking as these cases don't necessarily | |
361 | want the first byte and the last two bytes handled like this. */ | |
362 | if (big_p) | |
363 | x = (bfd_getb8 (bufp) << 16) | bfd_getb16 (bufp + 1); | |
364 | else | |
365 | x = bfd_getl16 (bufp) | (bfd_getb8 (bufp + 2) << 16); | |
366 | break; | |
367 | case 32: | |
368 | if (big_p) | |
369 | x = bfd_getb32 (bufp); | |
370 | else | |
371 | x = bfd_getl32 (bufp); | |
372 | break; | |
373 | default : | |
374 | abort (); | |
375 | } | |
376 | ||
377 | /* Written this way to avoid undefined behaviour. */ | |
378 | mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
379 | if (CGEN_INSN_LSB0_P) | |
380 | shift = start; | |
381 | else | |
382 | shift = (word_length - (start + length)); | |
383 | x = (x & ~(mask << shift)) | ((value & mask) << shift); | |
384 | ||
385 | switch (word_length) | |
386 | { | |
387 | case 8: | |
388 | *bufp = x; | |
389 | break; | |
390 | case 16: | |
391 | if (big_p) | |
392 | bfd_putb16 (x, bufp); | |
393 | else | |
394 | bfd_putl16 (x, bufp); | |
395 | break; | |
396 | case 24: | |
397 | /* ??? This may need reworking as these cases don't necessarily | |
398 | want the first byte and the last two bytes handled like this. */ | |
399 | if (big_p) | |
400 | { | |
401 | bfd_putb8 (x >> 16, bufp); | |
402 | bfd_putb16 (x, bufp + 1); | |
403 | } | |
404 | else | |
405 | { | |
406 | bfd_putl16 (x, bufp); | |
407 | bfd_putb8 (x >> 16, bufp + 2); | |
408 | } | |
409 | break; | |
410 | case 32: | |
411 | if (big_p) | |
412 | bfd_putb32 (x, bufp); | |
413 | else | |
414 | bfd_putl32 (x, bufp); | |
415 | break; | |
416 | default : | |
417 | abort (); | |
418 | } | |
419 | } | |
420 | ||
421 | #endif /* ! CGEN_INT_INSN_P */ | |
422 | ||
423 | /* Default insertion routine. | |
424 | ||
425 | ATTRS is a mask of the boolean attributes. | |
426 | START is the starting bit number, architecture origin. | |
427 | LENGTH is the length of VALUE in bits. | |
428 | TOTAL_LENGTH is the total length of the insn. | |
429 | ||
430 | The result is an error message or NULL if success. */ | |
431 | ||
432 | /* ??? May need to know word length in order to properly place values as | |
433 | an insn may be made of multiple words and the current bit number handling | |
434 | may be insufficient. Word length is an architectural attribute and thus | |
435 | methinks the way to go [if needed] is to fetch this value from OD or | |
436 | define a macro in <arch>-opc.h rather than adding an extra argument - | |
437 | after all that's how endianness is handled. */ | |
438 | /* ??? This duplicates functionality with bfd's howto table and | |
439 | bfd_install_relocation. */ | |
440 | /* ??? For architectures where insns can be representable as ints, | |
441 | store insn in `field' struct and add registers, etc. while parsing? */ | |
442 | /* ??? This doesn't handle bfd_vma's. Create another function when | |
443 | necessary. */ | |
444 | ||
445 | static const char * | |
446 | insert_normal (od, value, attrs, start, length, total_length, buffer) | |
447 | CGEN_OPCODE_DESC od; | |
448 | long value; | |
449 | unsigned int attrs; | |
450 | int start; | |
451 | int length; | |
452 | int total_length; | |
453 | CGEN_INSN_BYTES_PTR buffer; | |
454 | { | |
455 | static char errbuf[100]; | |
456 | /* Written this way to avoid undefined behaviour. */ | |
457 | unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1; | |
458 | ||
459 | /* If LENGTH is zero, this operand doesn't contribute to the value. */ | |
460 | if (length == 0) | |
461 | return NULL; | |
462 | ||
463 | /* Ensure VALUE will fit. */ | |
464 | if ((attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED)) != 0) | |
465 | { | |
466 | unsigned long maxval = mask; | |
467 | if ((unsigned long) value > maxval) | |
468 | { | |
469 | /* xgettext:c-format */ | |
470 | sprintf (errbuf, | |
471 | _("operand out of range (%lu not between 0 and %lu)"), | |
472 | value, maxval); | |
473 | return errbuf; | |
474 | } | |
475 | } | |
476 | else | |
477 | { | |
478 | long minval = - (1L << (length - 1)); | |
479 | long maxval = (1L << (length - 1)) - 1; | |
480 | if (value < minval || value > maxval) | |
481 | { | |
482 | sprintf | |
483 | /* xgettext:c-format */ | |
484 | (errbuf, _("operand out of range (%ld not between %ld and %ld)"), | |
485 | value, minval, maxval); | |
486 | return errbuf; | |
487 | } | |
488 | } | |
489 | ||
490 | #if CGEN_INT_INSN_P | |
491 | ||
492 | if (total_length > 32) | |
493 | abort (); | |
494 | { | |
495 | int shift; | |
496 | ||
497 | if (CGEN_INSN_LSB0_P) | |
498 | shift = start; | |
499 | else | |
500 | shift = total_length - (start + length); | |
501 | *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift); | |
502 | } | |
503 | ||
504 | #else | |
505 | ||
506 | /* FIXME: unfinished and untested */ | |
507 | ||
508 | /* ??? To be defined in <arch>-opc.h as necessary. */ | |
509 | #ifndef CGEN_WORD_ENDIAN | |
510 | #define CGEN_WORD_ENDIAN(od) CGEN_OPCODE_ENDIAN (od) | |
511 | #endif | |
512 | #ifndef CGEN_INSN_WORD_ENDIAN | |
513 | #define CGEN_INSN_WORD_ENDIAN(od) CGEN_WORD_ENDIAN (od) | |
514 | #endif | |
515 | ||
516 | /* The hard case is probably too slow for the normal cases. | |
517 | It's certainly more difficult to understand than the normal case. | |
518 | Thus this is split into two. Keep it that way. The hard case is defined | |
519 | to be when a field straddles a (loosely defined) word boundary | |
520 | (??? which may require target specific help to determine). */ | |
521 | ||
522 | #if 0 /*wip*/ | |
523 | ||
524 | #define HARD_CASE_P 0 /* FIXME:wip */ | |
525 | ||
526 | if (HARD_CASE_P) | |
527 | { | |
528 | unsigned char *bufp = (unsigned char *) buffer; | |
529 | int insn_length_left = total_length; | |
530 | ||
531 | if (CGEN_INSN_LSB0_P) | |
532 | { | |
533 | int word_offset = (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG | |
534 | ? ... | |
535 | : start / CGEN_BASE_INSN_BITSIZE); | |
536 | bufp += word_offset * (CGEN_BASE_INSN_BITSIZE / 8); | |
537 | if (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG) | |
538 | else | |
539 | start -= word_offset * CGEN_BASE_INSN_BITSIZE; | |
540 | } | |
541 | else | |
542 | { | |
543 | int word_offset = (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG | |
544 | ? start / CGEN_BASE_INSN_BITSIZE | |
545 | : ...); | |
546 | bufp += word_offset * (CGEN_BASE_INSN_BITSIZE / 8); | |
547 | if (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG) | |
548 | start -= word_offset * CGEN_BASE_INSN_BITSIZE; | |
549 | else | |
550 | } | |
551 | ||
552 | /* Loop so we handle a field straddling an insn word boundary | |
553 | (remember, "insn word boundary" is loosely defined here). */ | |
554 | ||
555 | while (length > 0) | |
556 | { | |
557 | int this_pass_length = length; | |
558 | int this_pass_start = start; | |
559 | int this_pass_word_length = min (insn_length_left, | |
560 | (CGEN_BASE_INSN_BITSIZE == 8 | |
561 | ? 32 | |
562 | : CGEN_BASE_INSN_BITSIZE)); | |
563 | ||
564 | insert_1 (od, value, attrs, | |
565 | this_pass_start, this_pass_length, this_pass_word_length, | |
566 | bufp); | |
567 | ||
568 | length -= this_pass_length; | |
569 | insn_length_left -= this_pass_word_length; | |
570 | if (???) | |
571 | { | |
572 | value >>= ???; | |
573 | start += ???; | |
574 | } | |
575 | else | |
576 | { | |
577 | value >>= ???; | |
578 | start += ???; | |
579 | } | |
580 | bufp += this_pass_word_length / 8; | |
581 | } | |
582 | } | |
583 | else | |
584 | #endif /* 0 */ | |
585 | { | |
586 | unsigned char *bufp = (unsigned char *) buffer; | |
587 | ||
588 | if (length > 32) | |
589 | abort (); | |
590 | ||
591 | /* Adjust start,total_length,bufp to point to the pseudo-word that holds | |
592 | the value. For example in a 48 bit insn where the value to insert | |
593 | (say an immediate value) is the last 16 bits then word_length here | |
594 | would be 16. To handle a 24 bit insn with an 18 bit immediate, | |
595 | insert_1 handles 24 bits (using a combination of bfd_get8,16). */ | |
596 | ||
597 | if (total_length > 32) | |
598 | { | |
599 | int needed_width = start % 8 + length; | |
600 | int fetch_length = (needed_width <= 8 ? 8 | |
601 | : needed_width <= 16 ? 16 | |
602 | : 32); | |
603 | ||
604 | if (CGEN_INSN_LSB0_P) | |
605 | { | |
606 | if (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG) | |
607 | { | |
608 | abort (); /* wip */ | |
609 | } | |
610 | else | |
611 | { | |
612 | int offset = start & ~7; | |
613 | ||
614 | bufp += offset / 8; | |
615 | start -= offset; | |
616 | total_length -= offset; | |
617 | } | |
618 | } | |
619 | else | |
620 | { | |
621 | if (CGEN_INSN_WORD_ENDIAN (od) == CGEN_ENDIAN_BIG) | |
622 | { | |
623 | int offset = start & ~7; | |
624 | ||
625 | bufp += offset / 8; | |
626 | start -= offset; | |
627 | total_length -= offset; | |
628 | } | |
629 | else | |
630 | { | |
631 | abort (); /* wip */ | |
632 | } | |
633 | } | |
634 | } | |
635 | ||
636 | insert_1 (od, value, start, length, total_length, bufp); | |
637 | } | |
638 | ||
639 | #endif /* ! CGEN_INT_INSN_P */ | |
640 | ||
641 | return NULL; | |
642 | } | |
643 | \f | |
644 | /* Default insn parser. | |
645 | ||
646 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
647 | Relocs are queued as we go via other callbacks. | |
648 | ||
649 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
650 | parse the instruction, we return 0 and the caller will start over from | |
651 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
652 | but that can be handled there. Not handling backtracking here may get | |
653 | expensive in the case of the m68k. Deal with later. | |
654 | ||
655 | Returns NULL for success, an error message for failure. | |
656 | */ | |
657 | ||
658 | static const char * | |
659 | parse_insn_normal (od, insn, strp, fields) | |
660 | CGEN_OPCODE_DESC od; | |
661 | const CGEN_INSN * insn; | |
662 | const char ** strp; | |
663 | CGEN_FIELDS * fields; | |
664 | { | |
665 | const CGEN_SYNTAX * syntax = CGEN_INSN_SYNTAX (insn); | |
666 | const char * str = *strp; | |
667 | const char * errmsg; | |
668 | const char * p; | |
669 | const unsigned char * syn; | |
670 | #ifdef CGEN_MNEMONIC_OPERANDS | |
671 | /* FIXME: wip */ | |
672 | int past_opcode_p; | |
673 | #endif | |
674 | ||
675 | /* For now we assume the mnemonic is first (there are no leading operands). | |
676 | We can parse it without needing to set up operand parsing. | |
677 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
678 | not be called from GAS. */ | |
679 | p = CGEN_INSN_MNEMONIC (insn); | |
680 | while (*p && tolower (*p) == tolower (*str)) | |
681 | ++p, ++str; | |
682 | ||
683 | if (* p || (* str && !isspace (* str))) | |
684 | return _("unrecognized instruction"); | |
685 | ||
686 | CGEN_INIT_PARSE (od); | |
687 | cgen_init_parse_operand (od); | |
688 | #ifdef CGEN_MNEMONIC_OPERANDS | |
689 | past_opcode_p = 0; | |
690 | #endif | |
691 | ||
692 | /* We don't check for (*str != '\0') here because we want to parse | |
693 | any trailing fake arguments in the syntax string. */ | |
694 | syn = CGEN_SYNTAX_STRING (syntax); | |
695 | ||
696 | /* Mnemonics come first for now, ensure valid string. */ | |
697 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
698 | abort (); | |
699 | ||
700 | ++syn; | |
701 | ||
702 | while (* syn != 0) | |
703 | { | |
704 | /* Non operand chars must match exactly. */ | |
705 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
706 | { | |
707 | if (*str == CGEN_SYNTAX_CHAR (* syn)) | |
708 | { | |
709 | #ifdef CGEN_MNEMONIC_OPERANDS | |
710 | if (* syn == ' ') | |
711 | past_opcode_p = 1; | |
712 | #endif | |
713 | ++ syn; | |
714 | ++ str; | |
715 | } | |
716 | else | |
717 | { | |
718 | /* Syntax char didn't match. Can't be this insn. */ | |
719 | /* FIXME: would like to return something like | |
720 | "expected char `c'" */ | |
721 | return _("syntax error"); | |
722 | } | |
723 | continue; | |
724 | } | |
725 | ||
726 | /* We have an operand of some sort. */ | |
727 | errmsg = fr30_cgen_parse_operand (od, CGEN_SYNTAX_FIELD (*syn), | |
728 | &str, fields); | |
729 | if (errmsg) | |
730 | return errmsg; | |
731 | ||
732 | /* Done with this operand, continue with next one. */ | |
733 | ++ syn; | |
734 | } | |
735 | ||
736 | /* If we're at the end of the syntax string, we're done. */ | |
737 | if (* syn == '\0') | |
738 | { | |
739 | /* FIXME: For the moment we assume a valid `str' can only contain | |
740 | blanks now. IE: We needn't try again with a longer version of | |
741 | the insn and it is assumed that longer versions of insns appear | |
742 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
743 | while (isspace (* str)) | |
744 | ++ str; | |
745 | ||
746 | if (* str != '\0') | |
747 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
748 | ||
749 | return NULL; | |
750 | } | |
751 | ||
752 | /* We couldn't parse it. */ | |
753 | return _("unrecognized instruction"); | |
754 | } | |
755 | ||
756 | /* Default insn builder (insert handler). | |
757 | The instruction is recorded in CGEN_INT_INSN_P byte order | |
758 | (meaning that if CGEN_INT_INSN_P BUFFER is an int * and thus the value is | |
759 | recorded in host byte order, otherwise BUFFER is an array of bytes and the | |
760 | value is recorded in target byte order). | |
761 | The result is an error message or NULL if success. */ | |
762 | ||
763 | static const char * | |
764 | insert_insn_normal (od, insn, fields, buffer, pc) | |
765 | CGEN_OPCODE_DESC od; | |
766 | const CGEN_INSN * insn; | |
767 | CGEN_FIELDS * fields; | |
768 | CGEN_INSN_BYTES_PTR buffer; | |
769 | bfd_vma pc; | |
770 | { | |
771 | const CGEN_SYNTAX * syntax = CGEN_INSN_SYNTAX (insn); | |
772 | unsigned long value; | |
773 | const unsigned char * syn; | |
774 | ||
775 | CGEN_INIT_INSERT (od); | |
776 | value = CGEN_INSN_VALUE (insn); | |
777 | ||
778 | /* If we're recording insns as numbers (rather than a string of bytes), | |
779 | target byte order handling is deferred until later. */ | |
780 | ||
781 | #if CGEN_INT_INSN_P | |
782 | ||
783 | *buffer = value; | |
784 | ||
785 | #else | |
786 | ||
787 | cgen_insn_put_value (od, buffer, min (CGEN_BASE_INSN_BITSIZE, | |
788 | CGEN_FIELDS_BITSIZE (fields)), | |
789 | value); | |
790 | ||
791 | #endif /* ! CGEN_INT_INSN_P */ | |
792 | ||
793 | /* ??? Rather than scanning the syntax string again, we could store | |
794 | in `fields' a null terminated list of the fields that are present. */ | |
795 | ||
796 | for (syn = CGEN_SYNTAX_STRING (syntax); * syn != '\0'; ++ syn) | |
797 | { | |
798 | const char *errmsg; | |
799 | ||
800 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
801 | continue; | |
802 | ||
803 | errmsg = fr30_cgen_insert_operand (od, CGEN_SYNTAX_FIELD (*syn), | |
804 | fields, buffer, pc); | |
805 | if (errmsg) | |
806 | return errmsg; | |
807 | } | |
808 | ||
809 | return NULL; | |
810 | } | |
811 | \f | |
812 | /* Main entry point. | |
813 | This routine is called for each instruction to be assembled. | |
814 | STR points to the insn to be assembled. | |
815 | We assume all necessary tables have been initialized. | |
816 | The assembled instruction, less any fixups, is stored in BUF. | |
817 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
818 | still needs to be converted to target byte order, otherwise BUF is an array | |
819 | of bytes in target byte order. | |
820 | The result is a pointer to the insn's entry in the opcode table, | |
821 | or NULL if an error occured (an error message will have already been | |
822 | printed). | |
823 | ||
824 | Note that when processing (non-alias) macro-insns, | |
825 | this function recurses. */ | |
826 | ||
827 | const CGEN_INSN * | |
828 | fr30_cgen_assemble_insn (od, str, fields, buf, errmsg) | |
829 | CGEN_OPCODE_DESC od; | |
830 | const char * str; | |
831 | CGEN_FIELDS * fields; | |
832 | CGEN_INSN_BYTES_PTR buf; | |
833 | char ** errmsg; | |
834 | { | |
835 | const char * start; | |
836 | CGEN_INSN_LIST * ilist; | |
837 | ||
838 | /* Skip leading white space. */ | |
839 | while (isspace (* str)) | |
840 | ++ str; | |
841 | ||
842 | /* The instructions are stored in hashed lists. | |
843 | Get the first in the list. */ | |
844 | ilist = CGEN_ASM_LOOKUP_INSN (od, str); | |
845 | ||
846 | /* Keep looking until we find a match. */ | |
847 | ||
848 | start = str; | |
849 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
850 | { | |
851 | const CGEN_INSN *insn = ilist->insn; | |
852 | ||
853 | #if 0 /* not needed as unsupported opcodes shouldn't be in the hash lists */ | |
854 | /* Is this insn supported by the selected cpu? */ | |
855 | if (! fr30_cgen_insn_supported (od, insn)) | |
856 | continue; | |
857 | #endif | |
858 | ||
859 | /* If the RELAX attribute is set, this is an insn that shouldn't be | |
860 | chosen immediately. Instead, it is used during assembler/linker | |
861 | relaxation if possible. */ | |
862 | if (CGEN_INSN_ATTR (insn, CGEN_INSN_RELAX) != 0) | |
863 | continue; | |
864 | ||
865 | str = start; | |
866 | ||
867 | /* Record a default length for the insn. This will get set to the | |
868 | correct value while parsing. */ | |
869 | /* FIXME: wip */ | |
870 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
871 | ||
872 | if (! CGEN_PARSE_FN (insn) (od, insn, & str, fields)) | |
873 | { | |
874 | /* ??? 0 is passed for `pc' */ | |
875 | if (CGEN_INSERT_FN (insn) (od, insn, fields, buf, (bfd_vma) 0) != NULL) | |
876 | continue; | |
877 | /* It is up to the caller to actually output the insn and any | |
878 | queued relocs. */ | |
879 | return insn; | |
880 | } | |
881 | ||
882 | /* Try the next entry. */ | |
883 | } | |
884 | ||
885 | /* FIXME: We can return a better error message than this. | |
886 | Need to track why it failed and pick the right one. */ | |
887 | { | |
888 | static char errbuf[100]; | |
889 | if (strlen (start) > 50) | |
890 | /* xgettext:c-format */ | |
891 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
892 | else | |
893 | /* xgettext:c-format */ | |
894 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
895 | ||
896 | *errmsg = errbuf; | |
897 | return NULL; | |
898 | } | |
899 | } | |
900 | \f | |
901 | #if 0 /* This calls back to GAS which we can't do without care. */ | |
902 | ||
903 | /* Record each member of OPVALS in the assembler's symbol table. | |
904 | This lets GAS parse registers for us. | |
905 | ??? Interesting idea but not currently used. */ | |
906 | ||
907 | /* Record each member of OPVALS in the assembler's symbol table. | |
908 | FIXME: Not currently used. */ | |
909 | ||
910 | void | |
911 | fr30_cgen_asm_hash_keywords (od, opvals) | |
912 | CGEN_OPCODE_DESC od; | |
913 | CGEN_KEYWORD * opvals; | |
914 | { | |
915 | CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); | |
916 | const CGEN_KEYWORD_ENTRY * ke; | |
917 | ||
918 | while ((ke = cgen_keyword_search_next (& search)) != NULL) | |
919 | { | |
920 | #if 0 /* Unnecessary, should be done in the search routine. */ | |
921 | if (! fr30_cgen_opval_supported (ke)) | |
922 | continue; | |
923 | #endif | |
924 | cgen_asm_record_register (od, ke->name, ke->value); | |
925 | } | |
926 | } | |
927 | ||
928 | #endif /* 0 */ |