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4f8d4a38 DD |
1 | /* reg.c --- register set model for RX simulator. |
2 | ||
e2882c85 | 3 | Copyright (C) 2005-2018 Free Software Foundation, Inc. |
4f8d4a38 DD |
4 | Contributed by Red Hat, Inc. |
5 | ||
6 | This file is part of the GNU simulators. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 3 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | ||
93378652 | 22 | #include "config.h" |
4f8d4a38 DD |
23 | #include <stdio.h> |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
27 | #include "cpu.h" | |
28 | #include "bfd.h" | |
29 | #include "trace.h" | |
30 | ||
31 | int verbose = 0; | |
32 | int trace = 0; | |
33 | int enable_counting = 0; | |
34 | ||
35 | int rx_in_gdb = 1; | |
36 | ||
37 | int rx_flagmask; | |
38 | int rx_flagand; | |
39 | int rx_flagor; | |
40 | ||
41 | int rx_big_endian; | |
42 | regs_type regs; | |
43 | int step_result; | |
44 | unsigned int heapbottom = 0; | |
45 | unsigned int heaptop = 0; | |
46 | ||
47 | char *reg_names[] = { | |
48 | /* general registers */ | |
49 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
50 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
51 | /* control register */ | |
52 | "psw", "pc", "usp", "fpsw", "RES", "RES", "RES", "RES", | |
53 | "bpsw", "bpc", "isp", "fintv", "intb", "RES", "RES", "RES", | |
54 | "RES", "RES", "RES", "RES", "RES", "RES", "RES", "RES", | |
55 | "RES", "RES", "RES", "RES", "RES", "RES", "RES", "RES", | |
56 | "temp", "acc", "acchi", "accmi", "acclo" | |
57 | }; | |
58 | ||
59 | unsigned int b2mask[] = { 0, 0xff, 0xffff, 0xffffff, 0xffffffff }; | |
60 | unsigned int b2signbit[] = { 0, (1 << 7), (1 << 15), (1 << 24), (1 << 31) }; | |
61 | int b2maxsigned[] = { 0, 0x7f, 0x7fff, 0x7fffff, 0x7fffffff }; | |
62 | int b2minsigned[] = { 0, -128, -32768, -8388608, -2147483647 - 1 }; | |
63 | ||
64 | static regs_type oldregs; | |
65 | ||
66 | void | |
67 | init_regs (void) | |
68 | { | |
69 | memset (®s, 0, sizeof (regs)); | |
70 | memset (&oldregs, 0, sizeof (oldregs)); | |
93378652 DD |
71 | |
72 | #ifdef CYCLE_ACCURATE | |
73 | regs.rt = -1; | |
74 | oldregs.rt = -1; | |
75 | #endif | |
4f8d4a38 DD |
76 | } |
77 | ||
78 | static unsigned int | |
79 | get_reg_i (int id) | |
80 | { | |
81 | if (id == 0) | |
82 | return regs.r_psw & FLAGBIT_U ? regs.r_usp : regs.r_isp; | |
83 | ||
84 | if (id >= 1 && id <= 15) | |
85 | return regs.r[id]; | |
86 | ||
87 | switch (id) | |
88 | { | |
89 | case psw: | |
90 | return regs.r_psw; | |
91 | case fpsw: | |
92 | return regs.r_fpsw; | |
93 | case isp: | |
94 | return regs.r_isp; | |
95 | case usp: | |
96 | return regs.r_usp; | |
97 | case bpc: | |
98 | return regs.r_bpc; | |
99 | case bpsw: | |
100 | return regs.r_bpsw; | |
101 | case fintv: | |
102 | return regs.r_fintv; | |
103 | case intb: | |
104 | return regs.r_intb; | |
105 | case pc: | |
106 | return regs.r_pc; | |
107 | case r_temp_idx: | |
108 | return regs.r_temp; | |
109 | case acchi: | |
110 | return (SI)(regs.r_acc >> 32); | |
111 | case accmi: | |
112 | return (SI)(regs.r_acc >> 16); | |
113 | case acclo: | |
114 | return (SI)regs.r_acc; | |
115 | } | |
116 | abort(); | |
117 | } | |
118 | ||
119 | unsigned int | |
120 | get_reg (int id) | |
121 | { | |
122 | unsigned int rv = get_reg_i (id); | |
123 | if (trace > ((id != pc && id != sp) ? 0 : 1)) | |
124 | printf ("get_reg (%s) = %08x\n", reg_names[id], rv); | |
125 | return rv; | |
126 | } | |
127 | ||
128 | static unsigned long long | |
129 | get_reg64_i (int id) | |
130 | { | |
131 | switch (id) | |
132 | { | |
133 | case acc64: | |
134 | return regs.r_acc; | |
135 | default: | |
136 | abort (); | |
137 | } | |
138 | } | |
139 | ||
140 | unsigned long long | |
141 | get_reg64 (int id) | |
142 | { | |
143 | unsigned long long rv = get_reg64_i (id); | |
144 | if (trace > ((id != pc && id != sp) ? 0 : 1)) | |
145 | printf ("get_reg (%s) = %016llx\n", reg_names[id], rv); | |
146 | return rv; | |
147 | } | |
148 | ||
149 | static int highest_sp = 0, lowest_sp = 0xffffff; | |
150 | ||
151 | void | |
152 | stack_heap_stats () | |
153 | { | |
154 | if (heapbottom < heaptop) | |
155 | printf ("heap: %08x - %08x (%d bytes)\n", heapbottom, heaptop, | |
156 | heaptop - heapbottom); | |
157 | if (lowest_sp < highest_sp) | |
158 | printf ("stack: %08x - %08x (%d bytes)\n", lowest_sp, highest_sp, | |
159 | highest_sp - lowest_sp); | |
160 | } | |
161 | ||
162 | void | |
163 | put_reg (int id, unsigned int v) | |
164 | { | |
165 | if (trace > ((id != pc) ? 0 : 1)) | |
166 | printf ("put_reg (%s) = %08x\n", reg_names[id], v); | |
167 | ||
168 | ||
169 | switch (id) | |
170 | { | |
171 | case psw: | |
172 | regs.r_psw = v; | |
173 | break; | |
174 | case fpsw: | |
175 | { | |
176 | SI anded; | |
177 | /* This is an odd one - The Cx flags are AND'd, and the FS flag | |
178 | is synthetic. */ | |
179 | anded = regs.r_fpsw & v; | |
180 | anded |= ~ FPSWBITS_CMASK; | |
181 | regs.r_fpsw = v & anded; | |
182 | if (regs.r_fpsw & FPSWBITS_FMASK) | |
183 | regs.r_fpsw |= FPSWBITS_FSUM; | |
184 | else | |
185 | regs.r_fpsw &= ~FPSWBITS_FSUM; | |
186 | } | |
187 | break; | |
188 | case isp: | |
189 | regs.r_isp = v; | |
190 | break; | |
191 | case usp: | |
192 | regs.r_usp = v; | |
193 | break; | |
194 | case bpc: | |
195 | regs.r_bpc = v; | |
196 | break; | |
197 | case bpsw: | |
198 | regs.r_bpsw = v; | |
199 | break; | |
200 | case fintv: | |
201 | regs.r_fintv = v; | |
202 | break; | |
203 | case intb: | |
204 | regs.r_intb = v; | |
205 | break; | |
206 | case pc: | |
207 | regs.r_pc = v; | |
208 | break; | |
209 | ||
210 | case acchi: | |
211 | regs.r_acc = (regs.r_acc & 0xffffffffULL) | ((DI)v << 32); | |
212 | break; | |
213 | case accmi: | |
214 | regs.r_acc = (regs.r_acc & ~0xffffffff0000ULL) | ((DI)v << 16); | |
215 | break; | |
216 | case acclo: | |
217 | regs.r_acc = (regs.r_acc & ~0xffffffffULL) | ((DI)v); | |
218 | break; | |
219 | ||
220 | case 0: /* Stack pointer is "in" R0. */ | |
221 | { | |
222 | if (v < heaptop) | |
223 | { | |
224 | unsigned int line; | |
225 | const char * dummy; | |
226 | const char * fname = NULL; | |
227 | ||
228 | sim_get_current_source_location (& dummy, & fname, &line); | |
229 | ||
230 | /* The setjmp and longjmp functions play tricks with the stack pointer. */ | |
231 | if (fname == NULL | |
232 | || (strcmp (fname, "_setjmp") != 0 | |
233 | && strcmp (fname, "_longjmp") != 0)) | |
234 | { | |
235 | printf ("collision in %s: pc %08x heap %08x stack %08x\n", | |
236 | fname, (unsigned int) regs.r_pc, heaptop, v); | |
237 | exit (1); | |
238 | } | |
239 | } | |
240 | else | |
241 | { | |
242 | if (v < lowest_sp) | |
243 | lowest_sp = v; | |
244 | if (v > highest_sp) | |
245 | highest_sp = v; | |
246 | } | |
247 | ||
248 | if (regs.r_psw & FLAGBIT_U) | |
249 | regs.r_usp = v; | |
250 | else | |
251 | regs.r_isp = v; | |
252 | break; | |
253 | } | |
254 | ||
255 | default: | |
63c72d1a | 256 | if (id >= 1 && id <= 15) |
4f8d4a38 DD |
257 | regs.r[id] = v; |
258 | else | |
259 | abort (); | |
260 | } | |
261 | } | |
262 | ||
263 | void | |
264 | put_reg64 (int id, unsigned long long v) | |
265 | { | |
266 | if (trace > ((id != pc) ? 0 : 1)) | |
267 | printf ("put_reg (%s) = %016llx\n", reg_names[id], v); | |
268 | ||
269 | switch (id) | |
270 | { | |
271 | case acc64: | |
272 | regs.r_acc = v; | |
273 | break; | |
274 | default: | |
275 | abort (); | |
276 | } | |
277 | } | |
278 | ||
279 | int | |
280 | condition_true (int cond_id) | |
281 | { | |
282 | int f; | |
283 | ||
284 | static const char *cond_name[] = { | |
285 | "Z", | |
286 | "!Z", | |
287 | "C", | |
288 | "!C", | |
289 | "C&!Z", | |
290 | "!(C&!Z)", | |
291 | "!S", | |
292 | "S", | |
293 | "!(S^O)", | |
294 | "S^O", | |
295 | "!((S^O)|Z)", | |
296 | "(S^O)|Z", | |
297 | "O", | |
298 | "!O", | |
299 | "always", | |
300 | "never" | |
301 | }; | |
302 | switch (cond_id & 15) | |
303 | { | |
304 | case 0: | |
305 | f = FLAG_Z; | |
306 | break; /* EQ/Z */ | |
307 | case 1: | |
308 | f = !FLAG_Z; | |
309 | break; /* NE/NZ */ | |
310 | case 2: | |
311 | f = FLAG_C; | |
312 | break; /* GEU/C */ | |
313 | case 3: | |
314 | f = !FLAG_C; | |
315 | break; /* LTU/NC */ | |
316 | case 4: | |
317 | f = FLAG_C & !FLAG_Z; | |
318 | break; /* GTU */ | |
319 | case 5: | |
320 | f = !(FLAG_C & !FLAG_Z); | |
321 | break; /* LEU */ | |
322 | case 6: | |
323 | f = !FLAG_S; | |
324 | break; /* PZ */ | |
325 | case 7: | |
326 | f = FLAG_S; | |
327 | break; /* N */ | |
328 | ||
329 | case 8: | |
330 | f = !(FLAG_S ^ FLAG_O); | |
331 | break; /* GE */ | |
332 | case 9: | |
333 | f = FLAG_S ^ FLAG_O; | |
334 | break; /* LT */ | |
335 | case 10: | |
336 | f = !((FLAG_S ^ FLAG_O) | FLAG_Z); | |
337 | break; /* GT */ | |
338 | case 11: | |
339 | f = (FLAG_S ^ FLAG_O) | FLAG_Z; | |
340 | break; /* LE */ | |
341 | case 12: | |
342 | f = FLAG_O; | |
343 | break; /* O */ | |
344 | case 13: | |
345 | f = !FLAG_O; | |
346 | break; /* NO */ | |
347 | case 14: | |
348 | f = 1; /* always */ | |
349 | break; | |
350 | default: | |
351 | f = 0; /* never */ | |
352 | break; | |
353 | } | |
354 | if (trace && ((cond_id & 15) != 14)) | |
355 | printf ("cond[%d] %s = %s\n", cond_id, cond_name[cond_id & 15], | |
356 | f ? "true" : "false"); | |
357 | return f; | |
358 | } | |
359 | ||
360 | void | |
361 | set_flags (int mask, int newbits) | |
362 | { | |
363 | regs.r_psw &= rx_flagand; | |
364 | regs.r_psw |= rx_flagor; | |
365 | regs.r_psw |= (newbits & mask & rx_flagmask); | |
366 | ||
367 | if (trace) | |
368 | { | |
369 | int i; | |
370 | printf ("flags now \033[32m %d", (int)((regs.r_psw >> 24) & 7)); | |
371 | for (i = 17; i >= 0; i--) | |
372 | if (0x3000f & (1 << i)) | |
373 | { | |
374 | if (regs.r_psw & (1 << i)) | |
375 | putchar ("CZSO------------IU"[i]); | |
376 | else | |
377 | putchar ('-'); | |
378 | } | |
379 | printf ("\033[0m\n"); | |
380 | } | |
381 | } | |
382 | ||
383 | void | |
384 | set_oszc (long long value, int b, int c) | |
385 | { | |
32b269ae | 386 | unsigned int mask = b2mask[b]; |
4f8d4a38 DD |
387 | int f = 0; |
388 | ||
389 | if (c) | |
390 | f |= FLAGBIT_C; | |
391 | if ((value & mask) == 0) | |
392 | f |= FLAGBIT_Z; | |
393 | if (value & b2signbit[b]) | |
394 | f |= FLAGBIT_S; | |
395 | if ((value > b2maxsigned[b]) || (value < b2minsigned[b])) | |
396 | f |= FLAGBIT_O; | |
397 | set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_O | FLAGBIT_C, f); | |
398 | } | |
399 | ||
400 | void | |
401 | set_szc (long long value, int b, int c) | |
402 | { | |
32b269ae | 403 | unsigned int mask = b2mask[b]; |
4f8d4a38 DD |
404 | int f = 0; |
405 | ||
406 | if (c) | |
407 | f |= FLAGBIT_C; | |
408 | if ((value & mask) == 0) | |
409 | f |= FLAGBIT_Z; | |
410 | if (value & b2signbit[b]) | |
411 | f |= FLAGBIT_S; | |
412 | set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_C, f); | |
413 | } | |
414 | ||
415 | void | |
416 | set_osz (long long value, int b) | |
417 | { | |
32b269ae | 418 | unsigned int mask = b2mask[b]; |
4f8d4a38 DD |
419 | int f = 0; |
420 | ||
421 | if ((value & mask) == 0) | |
422 | f |= FLAGBIT_Z; | |
423 | if (value & b2signbit[b]) | |
424 | f |= FLAGBIT_S; | |
425 | if ((value > b2maxsigned[b]) || (value < b2minsigned[b])) | |
426 | f |= FLAGBIT_O; | |
427 | set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_O, f); | |
428 | } | |
429 | ||
430 | void | |
431 | set_sz (long long value, int b) | |
432 | { | |
32b269ae | 433 | unsigned int mask = b2mask[b]; |
4f8d4a38 DD |
434 | int f = 0; |
435 | ||
436 | if ((value & mask) == 0) | |
437 | f |= FLAGBIT_Z; | |
438 | if (value & b2signbit[b]) | |
439 | f |= FLAGBIT_S; | |
440 | set_flags (FLAGBIT_Z | FLAGBIT_S, f); | |
441 | } | |
442 | ||
443 | void | |
444 | set_zc (int z, int c) | |
445 | { | |
446 | set_flags (FLAGBIT_C | FLAGBIT_Z, | |
447 | (c ? FLAGBIT_C : 0) | (z ? FLAGBIT_Z : 0)); | |
448 | } | |
449 | ||
450 | void | |
451 | set_c (int c) | |
452 | { | |
453 | set_flags (FLAGBIT_C, c ? FLAGBIT_C : 0); | |
454 | } | |
455 | ||
456 | static char * | |
457 | psw2str(int rpsw) | |
458 | { | |
459 | static char buf[10]; | |
460 | char *bp = buf; | |
461 | int i, ipl; | |
462 | ||
463 | ipl = (rpsw & FLAGBITS_IPL) >> FLAGSHIFT_IPL; | |
464 | if (ipl > 9) | |
465 | { | |
466 | *bp++ = (ipl / 10) + '0'; | |
467 | ipl %= 10; | |
468 | } | |
469 | *bp++ = ipl + '0'; | |
470 | for (i = 20; i >= 0; i--) | |
471 | if (0x13000f & (1 << i)) | |
472 | { | |
473 | if (rpsw & (1 << i)) | |
474 | *bp++ = "CZSO------------IU--P"[i]; | |
475 | else | |
476 | *bp++ = '-'; | |
477 | } | |
478 | *bp = 0; | |
479 | return buf; | |
480 | } | |
481 | ||
482 | static char * | |
483 | fpsw2str(int rpsw) | |
484 | { | |
485 | static char buf[100]; | |
486 | char *bp = buf; | |
487 | int i; /* ---+---+---+---+---+---+---+---+ */ | |
488 | const char s1[] = "FFFFFF-----------EEEEE-DCCCCCCRR"; | |
489 | const char s2[] = "SXUZOV-----------XUZOV-NEXUZOV01"; | |
490 | const char rm[4][3] = { "RC", "RZ", "RP", "RN" }; | |
491 | ||
492 | for (i = 31; i >= 0; i--) | |
493 | if (0xfc007dfc & (1 << i)) | |
494 | { | |
495 | if (rpsw & (1 << i)) | |
496 | { | |
497 | if (bp > buf) | |
498 | *bp++ = '.'; | |
499 | *bp++ = s1[31-i]; | |
500 | *bp++ = s2[31-i]; | |
501 | } | |
502 | } | |
503 | if (bp > buf) | |
504 | *bp++ = '.'; | |
505 | strcpy (bp, rm[rpsw&3]); | |
506 | return buf; | |
507 | } | |
508 | ||
509 | #define TRC(f,n) \ | |
510 | if (oldregs.f != regs.f) \ | |
511 | { \ | |
512 | if (tag) { printf (tag); tag = 0; } \ | |
513 | printf(" %s %08x:%08x", n, \ | |
514 | (unsigned int)oldregs.f, \ | |
515 | (unsigned int)regs.f); \ | |
516 | oldregs.f = regs.f; \ | |
517 | } | |
518 | ||
519 | void | |
520 | trace_register_changes (void) | |
521 | { | |
522 | char *tag = "\033[36mREGS:"; | |
523 | int i; | |
524 | ||
525 | if (!trace) | |
526 | return; | |
527 | for (i=1; i<16; i++) | |
528 | TRC (r[i], reg_names[i]); | |
529 | TRC (r_intb, "intb"); | |
530 | TRC (r_usp, "usp"); | |
531 | TRC (r_isp, "isp"); | |
532 | if (oldregs.r_psw != regs.r_psw) | |
533 | { | |
534 | if (tag) { printf (tag); tag = 0; } | |
535 | printf(" psw %s:", psw2str(oldregs.r_psw)); | |
536 | printf("%s", psw2str(regs.r_psw)); | |
537 | oldregs.r_psw = regs.r_psw; | |
538 | } | |
539 | ||
540 | if (oldregs.r_fpsw != regs.r_fpsw) | |
541 | { | |
542 | if (tag) { printf (tag); tag = 0; } | |
543 | printf(" fpsw %s:", fpsw2str(oldregs.r_fpsw)); | |
544 | printf("%s", fpsw2str(regs.r_fpsw)); | |
545 | oldregs.r_fpsw = regs.r_fpsw; | |
546 | } | |
547 | ||
548 | if (oldregs.r_acc != regs.r_acc) | |
549 | { | |
550 | if (tag) { printf (tag); tag = 0; } | |
551 | printf(" acc %016llx:", oldregs.r_acc); | |
552 | printf("%016llx", regs.r_acc); | |
553 | oldregs.r_acc = regs.r_acc; | |
554 | } | |
555 | ||
556 | if (tag == 0) | |
557 | printf ("\033[0m\n"); | |
558 | } |