Commit | Line | Data |
---|---|---|
ef230218 | 1 | /* BFD library support routines for the Renesas / SuperH SH architecture. |
82704155 | 2 | Copyright (C) 1993-2019 Free Software Foundation, Inc. |
252b5132 RH |
3 | Hacked by Steve Chamberlain of Cygnus Support. |
4 | ||
5177500f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
5177500f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
5177500f | 10 | (at your option) any later version. |
252b5132 | 11 | |
5177500f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
5177500f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 | 24 | #include "libbfd.h" |
f6f9408f | 25 | #include "../opcodes/sh-opc.h" |
252b5132 | 26 | |
07d6d2b8 AM |
27 | #define SH_NEXT arch_info_struct + 0 |
28 | #define SH2_NEXT arch_info_struct + 1 | |
29 | #define SH2E_NEXT arch_info_struct + 2 | |
30 | #define SH_DSP_NEXT arch_info_struct + 3 | |
31 | #define SH3_NEXT arch_info_struct + 4 | |
32 | #define SH3_NOMMU_NEXT arch_info_struct + 5 | |
33 | #define SH3_DSP_NEXT arch_info_struct + 6 | |
34 | #define SH3E_NEXT arch_info_struct + 7 | |
35 | #define SH4_NEXT arch_info_struct + 8 | |
36 | #define SH4A_NEXT arch_info_struct + 9 | |
37 | #define SH4AL_DSP_NEXT arch_info_struct + 10 | |
38 | #define SH4_NOFPU_NEXT arch_info_struct + 11 | |
39 | #define SH4_NOMMU_NOFPU_NEXT arch_info_struct + 12 | |
40 | #define SH4A_NOFPU_NEXT arch_info_struct + 13 | |
41 | #define SH2A_NEXT arch_info_struct + 14 | |
42 | #define SH2A_NOFPU_NEXT arch_info_struct + 15 | |
e38bc3b5 | 43 | #define SH2A_NOFPU_OR_SH4_NOMMU_NOFPU_NEXT arch_info_struct + 16 |
07d6d2b8 AM |
44 | #define SH2A_NOFPU_OR_SH3_NOMMU_NEXT arch_info_struct + 17 |
45 | #define SH2A_OR_SH4_NEXT arch_info_struct + 18 | |
211dc24b | 46 | #define SH2A_OR_SH3E_NEXT NULL |
252b5132 | 47 | |
71f6b586 | 48 | static const bfd_arch_info_type arch_info_struct[] = |
252b5132 | 49 | { |
d4845d57 | 50 | { |
e38bc3b5 NC |
51 | 32, /* 32 bits in a word. */ |
52 | 32, /* 32 bits in an address. */ | |
53 | 8, /* 8 bits in a byte. */ | |
d4845d57 JR |
54 | bfd_arch_sh, |
55 | bfd_mach_sh2, | |
e38bc3b5 NC |
56 | "sh", /* Architecture name. */ |
57 | "sh2", /* Machine name. */ | |
d4845d57 | 58 | 1, |
e38bc3b5 | 59 | FALSE, /* Not the default. */ |
d4845d57 | 60 | bfd_default_compatible, |
a44d7f9c | 61 | bfd_default_scan, |
b7761f11 | 62 | bfd_arch_default_fill, |
d4845d57 JR |
63 | SH2_NEXT |
64 | }, | |
5177500f | 65 | { |
e38bc3b5 NC |
66 | 32, /* 32 bits in a word. */ |
67 | 32, /* 32 bits in an address. */ | |
68 | 8, /* 8 bits in a byte. */ | |
5177500f NC |
69 | bfd_arch_sh, |
70 | bfd_mach_sh2e, | |
e38bc3b5 NC |
71 | "sh", /* Architecture name. */ |
72 | "sh2e", /* Machine name. */ | |
5177500f | 73 | 1, |
e38bc3b5 | 74 | FALSE, /* Not the default. */ |
5177500f NC |
75 | bfd_default_compatible, |
76 | bfd_default_scan, | |
b7761f11 | 77 | bfd_arch_default_fill, |
5177500f NC |
78 | SH2E_NEXT |
79 | }, | |
d4845d57 | 80 | { |
e38bc3b5 NC |
81 | 32, /* 32 bits in a word. */ |
82 | 32, /* 32 bits in an address. */ | |
83 | 8, /* 8 bits in a byte. */ | |
d4845d57 JR |
84 | bfd_arch_sh, |
85 | bfd_mach_sh_dsp, | |
e38bc3b5 NC |
86 | "sh", /* Architecture name. */ |
87 | "sh-dsp", /* Machine name. */ | |
d4845d57 | 88 | 1, |
e38bc3b5 | 89 | FALSE, /* Not the default. */ |
d4845d57 | 90 | bfd_default_compatible, |
a44d7f9c | 91 | bfd_default_scan, |
b7761f11 | 92 | bfd_arch_default_fill, |
d4845d57 JR |
93 | SH_DSP_NEXT |
94 | }, | |
252b5132 | 95 | { |
e38bc3b5 NC |
96 | 32, /* 32 bits in a word. */ |
97 | 32, /* 32 bits in an address. */ | |
98 | 8, /* 8 bits in a byte. */ | |
252b5132 RH |
99 | bfd_arch_sh, |
100 | bfd_mach_sh3, | |
e38bc3b5 NC |
101 | "sh", /* Architecture name. */ |
102 | "sh3", /* Machine name. */ | |
252b5132 | 103 | 1, |
e38bc3b5 | 104 | FALSE, /* Not the default. */ |
252b5132 | 105 | bfd_default_compatible, |
a44d7f9c | 106 | bfd_default_scan, |
b7761f11 | 107 | bfd_arch_default_fill, |
252b5132 RH |
108 | SH3_NEXT |
109 | }, | |
f6f9408f | 110 | { |
e38bc3b5 NC |
111 | 32, /* 32 bits in a word. */ |
112 | 32, /* 32 bits in an address. */ | |
113 | 8, /* 8 bits in a byte. */ | |
f6f9408f JR |
114 | bfd_arch_sh, |
115 | bfd_mach_sh3_nommu, | |
e38bc3b5 NC |
116 | "sh", /* Architecture name. */ |
117 | "sh3-nommu", /* Machine name. */ | |
f6f9408f | 118 | 1, |
e38bc3b5 | 119 | FALSE, /* Not the default. */ |
f6f9408f JR |
120 | bfd_default_compatible, |
121 | bfd_default_scan, | |
b7761f11 | 122 | bfd_arch_default_fill, |
f6f9408f JR |
123 | SH3_NOMMU_NEXT |
124 | }, | |
d4845d57 | 125 | { |
e38bc3b5 NC |
126 | 32, /* 32 bits in a word. */ |
127 | 32, /* 32 bits in an address. */ | |
128 | 8, /* 8 bits in a byte. */ | |
d4845d57 JR |
129 | bfd_arch_sh, |
130 | bfd_mach_sh3_dsp, | |
e38bc3b5 NC |
131 | "sh", /* Architecture name. */ |
132 | "sh3-dsp", /* Machine name. */ | |
d4845d57 | 133 | 1, |
e38bc3b5 | 134 | FALSE, /* Not the default. */ |
d4845d57 | 135 | bfd_default_compatible, |
a44d7f9c | 136 | bfd_default_scan, |
b7761f11 | 137 | bfd_arch_default_fill, |
d4845d57 JR |
138 | SH3_DSP_NEXT |
139 | }, | |
252b5132 | 140 | { |
e38bc3b5 NC |
141 | 32, /* 32 bits in a word. */ |
142 | 32, /* 32 bits in an address. */ | |
143 | 8, /* 8 bits in a byte. */ | |
252b5132 RH |
144 | bfd_arch_sh, |
145 | bfd_mach_sh3e, | |
e38bc3b5 NC |
146 | "sh", /* Architecture name. */ |
147 | "sh3e", /* Machine name. */ | |
252b5132 | 148 | 1, |
e38bc3b5 | 149 | FALSE, /* Not the default. */ |
252b5132 | 150 | bfd_default_compatible, |
a44d7f9c | 151 | bfd_default_scan, |
b7761f11 | 152 | bfd_arch_default_fill, |
252b5132 RH |
153 | SH3E_NEXT |
154 | }, | |
d4845d57 | 155 | { |
e38bc3b5 NC |
156 | 32, /* 32 bits in a word. */ |
157 | 32, /* 32 bits in an address. */ | |
158 | 8, /* 8 bits in a byte. */ | |
d4845d57 JR |
159 | bfd_arch_sh, |
160 | bfd_mach_sh4, | |
e38bc3b5 NC |
161 | "sh", /* Architecture name. */ |
162 | "sh4", /* Machine name. */ | |
d4845d57 | 163 | 1, |
e38bc3b5 | 164 | FALSE, /* Not the default. */ |
d4845d57 | 165 | bfd_default_compatible, |
a44d7f9c | 166 | bfd_default_scan, |
b7761f11 | 167 | bfd_arch_default_fill, |
d4845d57 JR |
168 | SH4_NEXT |
169 | }, | |
af9ba621 | 170 | { |
e38bc3b5 NC |
171 | 32, /* 32 bits in a word. */ |
172 | 32, /* 32 bits in an address. */ | |
173 | 8, /* 8 bits in a byte. */ | |
af9ba621 CV |
174 | bfd_arch_sh, |
175 | bfd_mach_sh4a, | |
e38bc3b5 NC |
176 | "sh", /* Architecture name. */ |
177 | "sh4a", /* Machine name. */ | |
af9ba621 | 178 | 1, |
e38bc3b5 | 179 | FALSE, /* Not the default. */ |
af9ba621 CV |
180 | bfd_default_compatible, |
181 | bfd_default_scan, | |
b7761f11 | 182 | bfd_arch_default_fill, |
af9ba621 CV |
183 | SH4A_NEXT |
184 | }, | |
185 | { | |
e38bc3b5 NC |
186 | 32, /* 32 bits in a word. */ |
187 | 32, /* 32 bits in an address. */ | |
188 | 8, /* 8 bits in a byte. */ | |
af9ba621 CV |
189 | bfd_arch_sh, |
190 | bfd_mach_sh4al_dsp, | |
e38bc3b5 NC |
191 | "sh", /* Architecture name. */ |
192 | "sh4al-dsp", /* Machine name. */ | |
af9ba621 | 193 | 1, |
e38bc3b5 | 194 | FALSE, /* Not the default. */ |
af9ba621 CV |
195 | bfd_default_compatible, |
196 | bfd_default_scan, | |
b7761f11 | 197 | bfd_arch_default_fill, |
af9ba621 CV |
198 | SH4AL_DSP_NEXT |
199 | }, | |
200 | { | |
e38bc3b5 NC |
201 | 32, /* 32 bits in a word. */ |
202 | 32, /* 32 bits in an address. */ | |
203 | 8, /* 8 bits in a byte. */ | |
af9ba621 CV |
204 | bfd_arch_sh, |
205 | bfd_mach_sh4_nofpu, | |
e38bc3b5 NC |
206 | "sh", /* Architecture name. */ |
207 | "sh4-nofpu", /* Machine name. */ | |
af9ba621 | 208 | 1, |
e38bc3b5 | 209 | FALSE, /* Not the default. */ |
af9ba621 CV |
210 | bfd_default_compatible, |
211 | bfd_default_scan, | |
b7761f11 | 212 | bfd_arch_default_fill, |
af9ba621 CV |
213 | SH4_NOFPU_NEXT |
214 | }, | |
ae51a426 | 215 | { |
e38bc3b5 NC |
216 | 32, /* 32 bits in a word. */ |
217 | 32, /* 32 bits in an address. */ | |
218 | 8, /* 8 bits in a byte. */ | |
ae51a426 JR |
219 | bfd_arch_sh, |
220 | bfd_mach_sh4_nommu_nofpu, | |
e38bc3b5 NC |
221 | "sh", /* Architecture name. */ |
222 | "sh4-nommu-nofpu", /* Machine name. */ | |
ae51a426 | 223 | 1, |
e38bc3b5 | 224 | FALSE, /* Not the default. */ |
ae51a426 JR |
225 | bfd_default_compatible, |
226 | bfd_default_scan, | |
b7761f11 | 227 | bfd_arch_default_fill, |
ae51a426 JR |
228 | SH4_NOMMU_NOFPU_NEXT |
229 | }, | |
af9ba621 | 230 | { |
e38bc3b5 NC |
231 | 32, /* 32 bits in a word. */ |
232 | 32, /* 32 bits in an address. */ | |
233 | 8, /* 8 bits in a byte. */ | |
af9ba621 CV |
234 | bfd_arch_sh, |
235 | bfd_mach_sh4a_nofpu, | |
e38bc3b5 NC |
236 | "sh", /* Architecture name. */ |
237 | "sh4a-nofpu", /* Machine name. */ | |
af9ba621 | 238 | 1, |
e38bc3b5 | 239 | FALSE, /* Not the default. */ |
af9ba621 CV |
240 | bfd_default_compatible, |
241 | bfd_default_scan, | |
b7761f11 | 242 | bfd_arch_default_fill, |
af9ba621 CV |
243 | SH4A_NOFPU_NEXT |
244 | }, | |
1d70c7fb AO |
245 | { |
246 | 32, /* 32 bits in a word. */ | |
247 | 32, /* 32 bits in an address. */ | |
248 | 8, /* 8 bits in a byte. */ | |
249 | bfd_arch_sh, | |
250 | bfd_mach_sh2a, | |
e38bc3b5 NC |
251 | "sh", /* Architecture name. */ |
252 | "sh2a", /* Machine name. */ | |
1d70c7fb AO |
253 | 1, |
254 | FALSE, /* Not the default. */ | |
255 | bfd_default_compatible, | |
256 | bfd_default_scan, | |
b7761f11 | 257 | bfd_arch_default_fill, |
1d70c7fb AO |
258 | SH2A_NEXT |
259 | }, | |
260 | { | |
261 | 32, /* 32 bits in a word. */ | |
262 | 32, /* 32 bits in an address. */ | |
263 | 8, /* 8 bits in a byte. */ | |
264 | bfd_arch_sh, | |
265 | bfd_mach_sh2a_nofpu, | |
e38bc3b5 NC |
266 | "sh", /* Architecture name. */ |
267 | "sh2a-nofpu", /* Machine name. */ | |
1d70c7fb AO |
268 | 1, |
269 | FALSE, /* Not the default. */ | |
270 | bfd_default_compatible, | |
271 | bfd_default_scan, | |
b7761f11 | 272 | bfd_arch_default_fill, |
1d70c7fb AO |
273 | SH2A_NOFPU_NEXT |
274 | }, | |
fbca6ad9 | 275 | { |
e38bc3b5 NC |
276 | 32, /* 32 bits in a word. */ |
277 | 32, /* 32 bits in an address. */ | |
278 | 8, /* 8 bits in a byte. */ | |
279 | bfd_arch_sh, | |
280 | bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu, | |
281 | "sh", /* Architecture name. */ | |
282 | "sh2a-nofpu-or-sh4-nommu-nofpu", /* Machine name. */ | |
283 | 1, | |
284 | FALSE, /* Not the default. */ | |
285 | bfd_default_compatible, | |
286 | bfd_default_scan, | |
b7761f11 | 287 | bfd_arch_default_fill, |
e38bc3b5 NC |
288 | SH2A_NOFPU_OR_SH4_NOMMU_NOFPU_NEXT |
289 | }, | |
290 | { | |
291 | 32, /* 32 bits in a word. */ | |
292 | 32, /* 32 bits in an address. */ | |
293 | 8, /* 8 bits in a byte. */ | |
294 | bfd_arch_sh, | |
295 | bfd_mach_sh2a_nofpu_or_sh3_nommu, | |
296 | "sh", /* Architecture name. . */ | |
297 | "sh2a-nofpu-or-sh3-nommu", /* Machine name. */ | |
298 | 1, | |
299 | FALSE, /* Not the default. */ | |
300 | bfd_default_compatible, | |
301 | bfd_default_scan, | |
b7761f11 | 302 | bfd_arch_default_fill, |
e38bc3b5 NC |
303 | SH2A_NOFPU_OR_SH3_NOMMU_NEXT |
304 | }, | |
305 | { | |
306 | 32, /* 32 bits in a word. */ | |
307 | 32, /* 32 bits in an address. */ | |
308 | 8, /* 8 bits in a byte. */ | |
309 | bfd_arch_sh, | |
310 | bfd_mach_sh2a_or_sh4, | |
311 | "sh", /* Architecture name. */ | |
312 | "sh2a-or-sh4", /* Machine name. */ | |
313 | 1, | |
314 | FALSE, /* Not the default. */ | |
315 | bfd_default_compatible, | |
316 | bfd_default_scan, | |
b7761f11 | 317 | bfd_arch_default_fill, |
e38bc3b5 NC |
318 | SH2A_OR_SH4_NEXT |
319 | }, | |
320 | { | |
321 | 32, /* 32 bits in a word. */ | |
322 | 32, /* 32 bits in an address. */ | |
323 | 8, /* 8 bits in a byte. */ | |
324 | bfd_arch_sh, | |
325 | bfd_mach_sh2a_or_sh3e, | |
326 | "sh", /* Architecture name. */ | |
327 | "sh2a-or-sh3e", /* Machine name. */ | |
328 | 1, | |
329 | FALSE, /* Not the default. */ | |
330 | bfd_default_compatible, | |
331 | bfd_default_scan, | |
b7761f11 | 332 | bfd_arch_default_fill, |
e38bc3b5 NC |
333 | SH2A_OR_SH3E_NEXT |
334 | }, | |
252b5132 RH |
335 | }; |
336 | ||
337 | const bfd_arch_info_type bfd_sh_arch = | |
338 | { | |
e38bc3b5 NC |
339 | 32, /* 32 bits in a word. */ |
340 | 32, /* 32 bits in an address. */ | |
341 | 8, /* 8 bits in a byte. */ | |
252b5132 RH |
342 | bfd_arch_sh, |
343 | bfd_mach_sh, | |
e38bc3b5 NC |
344 | "sh", /* Architecture name. */ |
345 | "sh", /* Machine name. */ | |
252b5132 | 346 | 1, |
e38bc3b5 | 347 | TRUE, /* The default machine. */ |
252b5132 | 348 | bfd_default_compatible, |
a44d7f9c | 349 | bfd_default_scan, |
b7761f11 | 350 | bfd_arch_default_fill, |
252b5132 RH |
351 | SH_NEXT |
352 | }; | |
f6f9408f JR |
353 | |
354 | ||
355 | /* This table defines the mappings from the BFD internal numbering | |
356 | system to the opcodes internal flags system. | |
357 | It is used by the functions defined below. | |
358 | The prototypes for these SH specific functions are found in | |
359 | sh-opc.h . */ | |
360 | ||
361 | static struct { unsigned long bfd_mach, arch, arch_up; } bfd_to_arch_table[] = | |
362 | { | |
07d6d2b8 AM |
363 | { bfd_mach_sh, arch_sh1, arch_sh_up }, |
364 | { bfd_mach_sh2, arch_sh2, arch_sh2_up }, | |
365 | { bfd_mach_sh2e, arch_sh2e, arch_sh2e_up }, | |
366 | { bfd_mach_sh_dsp, arch_sh_dsp, arch_sh_dsp_up }, | |
367 | { bfd_mach_sh2a, arch_sh2a, arch_sh2a_up }, | |
368 | { bfd_mach_sh2a_nofpu, arch_sh2a_nofpu, arch_sh2a_nofpu_up }, | |
369 | ||
370 | { bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu, arch_sh2a_nofpu_or_sh4_nommu_nofpu, arch_sh2a_nofpu_or_sh4_nommu_nofpu_up }, | |
371 | { bfd_mach_sh2a_nofpu_or_sh3_nommu, arch_sh2a_nofpu_or_sh3_nommu, arch_sh2a_nofpu_or_sh3_nommu_up }, | |
372 | { bfd_mach_sh2a_or_sh4, arch_sh2a_or_sh4, arch_sh2a_or_sh4_up }, | |
e38bc3b5 | 373 | { bfd_mach_sh2a_or_sh3e, arch_sh2a_or_sh3e, arch_sh2a_or_sh3e_up }, |
68ffbac6 | 374 | |
07d6d2b8 AM |
375 | { bfd_mach_sh3, arch_sh3, arch_sh3_up }, |
376 | { bfd_mach_sh3_nommu, arch_sh3_nommu, arch_sh3_nommu_up }, | |
377 | { bfd_mach_sh3_dsp, arch_sh3_dsp, arch_sh3_dsp_up }, | |
378 | { bfd_mach_sh3e, arch_sh3e, arch_sh3e_up }, | |
379 | { bfd_mach_sh4, arch_sh4, arch_sh4_up }, | |
380 | { bfd_mach_sh4a, arch_sh4a, arch_sh4a_up }, | |
381 | { bfd_mach_sh4al_dsp, arch_sh4al_dsp, arch_sh4al_dsp_up }, | |
382 | { bfd_mach_sh4_nofpu, arch_sh4_nofpu, arch_sh4_nofpu_up }, | |
f6f9408f | 383 | { bfd_mach_sh4_nommu_nofpu, arch_sh4_nommu_nofpu, arch_sh4_nommu_nofpu_up }, |
07d6d2b8 AM |
384 | { bfd_mach_sh4a_nofpu, arch_sh4a_nofpu, arch_sh4a_nofpu_up }, |
385 | { 0, 0, 0 } /* Terminator. */ | |
f6f9408f JR |
386 | }; |
387 | ||
388 | ||
389 | /* Convert a BFD mach number into the right opcodes arch flags | |
390 | using the table above. */ | |
391 | ||
392 | unsigned int | |
393 | sh_get_arch_from_bfd_mach (unsigned long mach) | |
394 | { | |
395 | int i = 0; | |
e38bc3b5 | 396 | |
f6f9408f JR |
397 | while (bfd_to_arch_table[i].bfd_mach != 0) |
398 | if (bfd_to_arch_table[i].bfd_mach == mach) | |
399 | return bfd_to_arch_table[i].arch; | |
400 | else | |
401 | i++; | |
402 | ||
e38bc3b5 | 403 | /* Machine not found. */ |
f6f9408f JR |
404 | BFD_FAIL(); |
405 | ||
406 | return SH_ARCH_UNKNOWN_ARCH; | |
407 | } | |
408 | ||
409 | ||
410 | /* Convert a BFD mach number into a set of opcodes arch flags | |
411 | describing all the compatible architectures (i.e. arch_up) | |
412 | using the table above. */ | |
413 | ||
414 | unsigned int | |
415 | sh_get_arch_up_from_bfd_mach (unsigned long mach) | |
416 | { | |
417 | int i = 0; | |
e38bc3b5 | 418 | |
f6f9408f JR |
419 | while (bfd_to_arch_table[i].bfd_mach != 0) |
420 | if (bfd_to_arch_table[i].bfd_mach == mach) | |
421 | return bfd_to_arch_table[i].arch_up; | |
422 | else | |
423 | i++; | |
424 | ||
e38bc3b5 | 425 | /* Machine not found. */ |
f6f9408f JR |
426 | BFD_FAIL(); |
427 | ||
428 | return SH_ARCH_UNKNOWN_ARCH; | |
429 | } | |
430 | ||
431 | ||
432 | /* Convert an arbitary arch_set - not necessarily corresponding | |
433 | directly to anything in the table above - to the most generic | |
434 | architecture which supports all the required features, and | |
435 | return the corresponding BFD mach. */ | |
436 | ||
437 | unsigned long | |
438 | sh_get_bfd_mach_from_arch_set (unsigned int arch_set) | |
439 | { | |
440 | unsigned long result = 0; | |
441 | unsigned int best = ~arch_set; | |
442 | unsigned int co_mask = ~0; | |
443 | int i = 0; | |
444 | ||
445 | /* If arch_set permits variants with no coprocessor then do not allow | |
446 | the other irrelevant co-processor bits to influence the choice: | |
447 | e.g. if dsp is disallowed by arch_set, then the algorithm would | |
448 | prefer fpu variants over nofpu variants because they also disallow | |
449 | dsp - even though the nofpu would be the most correct choice. | |
450 | This assumes that EVERY fpu/dsp variant has a no-coprocessor | |
451 | counter-part, or their non-fpu/dsp instructions do not have the | |
452 | no co-processor bit set. */ | |
453 | if (arch_set & arch_sh_no_co) | |
454 | co_mask = ~(arch_sh_sp_fpu | arch_sh_dp_fpu | arch_sh_has_dsp); | |
455 | ||
456 | while (bfd_to_arch_table[i].bfd_mach != 0) | |
457 | { | |
458 | unsigned int try = bfd_to_arch_table[i].arch_up & co_mask; | |
459 | ||
460 | /* Conceptually: Find the architecture with the least number | |
461 | of extra features or, if they have the same number, then | |
462 | the greatest number of required features. Disregard | |
07d6d2b8 | 463 | architectures where the required features alone do |
f6f9408f JR |
464 | not describe a valid architecture. */ |
465 | if (((try & ~arch_set) < (best & ~arch_set) | |
466 | || ((try & ~arch_set) == (best & ~arch_set) | |
467 | && (~try & arch_set) < (~best & arch_set))) | |
468 | && SH_MERGE_ARCH_SET_VALID (try, arch_set)) | |
469 | { | |
470 | result = bfd_to_arch_table[i].bfd_mach; | |
471 | best = try; | |
472 | } | |
473 | ||
474 | i++; | |
475 | } | |
476 | ||
477 | /* This might happen if a new variant is added to sh-opc.h | |
478 | but no corresponding entry is added to the table above. */ | |
479 | BFD_ASSERT (result != 0); | |
480 | ||
481 | return result; | |
482 | } |