1 /* reg.c --- register set model for M32C simulator.
3 Copyright (C) 2005-2014 Free Software Foundation, Inc.
4 Contributed by Red Hat, Inc.
6 This file is part of the GNU simulators.
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.
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.
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/>. */
30 int enable_counting = 0;
34 int addr_mask = 0xffff;
35 int membus_mask = 0xfffff;
38 unsigned int heapbottom = 0;
39 unsigned int heaptop = 0;
52 "intb", "intbl", "intbh",
53 "sp", "usp", "isp", "pc", "flags"
72 unsigned int b2mask[] = { 0, 0xff, 0xffff, 0xffffff, 0xffffffff };
73 unsigned int b2signbit[] = { 0, (1 << 7), (1 << 15), (1 << 24), (1 << 31) };
74 int b2maxsigned[] = { 0, 0x7f, 0x7fff, 0x7fffff, 0x7fffffff };
75 int b2minsigned[] = { 0, -128, -32768, -8388608, -2147483647 - 1 };
77 static regs_type oldregs;
84 memset (®s, 0, sizeof (regs));
85 memset (&oldregs, 0, sizeof (oldregs));
89 set_pointer_width (int bytes)
94 membus_mask = 0x000fffff;
95 reg_bytes[a0] = reg_bytes[a1] = reg_bytes[sb] = reg_bytes[fb] =
96 reg_bytes[sp] = reg_bytes[usp] = reg_bytes[isp] = 2;
100 addr_mask = 0xffffff;
101 membus_mask = 0x00ffffff;
102 reg_bytes[a0] = reg_bytes[a1] = reg_bytes[sb] = reg_bytes[fb] =
103 reg_bytes[sp] = reg_bytes[usp] = reg_bytes[isp] = 3;
108 m32c_set_cpu (int cpu)
114 set_pointer_width (2);
115 decode_opcode = decode_r8c;
119 set_pointer_width (3);
120 decode_opcode = decode_m32c;
129 get_reg_i (reg_id id)
131 reg_bank_type *b = regs.r + (FLAG_B ? 1 : 0);
140 return b->r_r0 & 0xff;
146 return b->r_r1 & 0xff;
150 return b->r_r2 * 65536 + b->r_r0;
154 return b->r_r3 * 65536 + b->r_r1;
157 return b->r_a0 & addr_mask;
159 return b->r_a1 & addr_mask;
161 return (b->r_a1 & 0xffff) * 65536 | (b->r_a0 & 0xffff);
164 return b->r_sb & addr_mask;
166 return b->r_fb & addr_mask;
169 return regs.r_intbh * 65536 + regs.r_intbl;
176 return ((regs.r_flags & FLAGBIT_U) ? regs.r_usp : regs.
179 return regs.r_usp & addr_mask;
181 return regs.r_isp & addr_mask;
184 return regs.r_pc & membus_mask;
195 unsigned int rv = get_reg_i (id);
196 if (trace > ((id != pc && id != fb && id != sp) ? 0 : 1))
197 printf ("get_reg (%s) = %0*x\n", reg_names[id], reg_bytes[id] * 2, rv);
202 get_reg_ll (reg_id id)
204 reg_bank_type *b = regs.r + (FLAG_B ? 1 : 0);
209 return ((DI) b->r_r3 << 48
210 | (DI) b->r_r1 << 32 | (DI) b->r_r2 << 16 | (DI) b->r_r0);
212 return ((DI) b->r_r3 << 48
213 | (DI) b->r_r2 << 32 | (DI) b->r_r1 << 16 | (DI) b->r_r0);
219 static int highest_sp = 0, lowest_sp = 0xffffff;
224 printf ("heap: %08x - %08x (%d bytes)\n", heapbottom, heaptop,
225 heaptop - heapbottom);
226 printf ("stack: %08x - %08x (%d bytes)\n", lowest_sp, highest_sp,
227 highest_sp - lowest_sp);
231 put_reg (reg_id id, unsigned int v)
233 if (trace > ((id != pc) ? 0 : 1))
234 printf ("put_reg (%s) = %0*x\n", reg_names[id], reg_bytes[id] * 2, v);
236 reg_bank_type *b = regs.r + (FLAG_B ? 1 : 0);
243 b->r_r0 = (b->r_r0 & 0xff) | (v << 8);
246 b->r_r0 = (b->r_r0 & 0xff00) | (v & 0xff);
252 b->r_r1 = (b->r_r1 & 0xff) | (v << 8);
255 b->r_r1 = (b->r_r1 & 0xff00) | (v & 0xff);
261 b->r_r0 = v & 0xffff;
268 b->r_r1 = v & 0xffff;
273 b->r_a0 = v & addr_mask;
276 b->r_a1 = v & addr_mask;
279 b->r_a0 = v & 0xffff;
284 b->r_sb = v & addr_mask;
287 b->r_fb = v & addr_mask;
291 regs.r_intbl = v & 0xffff;
292 regs.r_intbh = v >> 16;
295 regs.r_intbl = v & 0xffff;
298 regs.r_intbh = v & 0xff;
304 if (regs.r_flags & FLAGBIT_U)
308 *spp = v & addr_mask;
311 printf ("collision: pc %08lx heap %08x stack %08lx\n", regs.r_pc,
315 if (*spp < lowest_sp)
317 if (*spp > highest_sp)
322 regs.r_usp = v & addr_mask;
325 regs.r_isp = v & addr_mask;
329 regs.r_pc = v & membus_mask;
340 condition_true (int cond_id)
345 static const char *cond_name[] = {
346 "C", "C&!Z", "Z", "S",
347 "!C", "!(C&!Z)", "!Z", "!S",
348 "(S^O)|Z", "O", "!(S^O)", "unk",
349 "!((S^O)|Z)", "!O", "S^O", "unk"
351 switch (cond_id & 15)
357 f = FLAG_C & !FLAG_Z;
369 f = !(FLAG_C & !FLAG_Z);
379 f = (FLAG_S ^ FLAG_O) | FLAG_Z;
385 f = !(FLAG_S ^ FLAG_O);
388 f = !((FLAG_S ^ FLAG_O) | FLAG_Z);
402 printf ("cond[%d] %s = %s\n", cond_id, cond_name[cond_id & 15],
403 f ? "true" : "false");
407 static const char *cond_name[] = {
408 "!C", "LEU", "!Z", "PZ",
409 "!O", "GT", "GE", "?",
410 "C", "GTU", "Z", "N",
411 "O", "LE", "LT", "!?"
413 switch (cond_id & 15)
419 f = !(FLAG_C & !FLAG_Z);
432 f = !((FLAG_S ^ FLAG_O) | FLAG_Z);
435 f = !(FLAG_S ^ FLAG_O);
442 f = FLAG_C & !FLAG_Z;
455 f = (FLAG_S ^ FLAG_O) | FLAG_Z;
466 printf ("cond[%d] %s = %s\n", cond_id, cond_name[cond_id & 15],
467 f ? "true" : "false");
473 set_flags (int mask, int newbits)
476 regs.r_flags &= ~mask;
477 regs.r_flags |= newbits & mask;
480 printf ("flags now \033[32m %d", (regs.r_flags >> (A16 ? 8 : 12)) & 7);
481 for (i = 7; i >= 0; i--)
482 if (regs.r_flags & (1 << i))
483 putchar ("CDZSBOIU"[i]);
486 printf ("\033[0m\n");
491 set_oszc (int value, int b, int c)
493 int mask = b2mask[b];
498 if ((value & mask) == 0)
500 if (value & b2signbit[b])
502 if ((value > b2maxsigned[b]) || (value < b2minsigned[b]))
504 set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_O | FLAGBIT_C, f);
508 set_szc (int value, int b, int c)
510 int mask = b2mask[b];
515 if ((value & mask) == 0)
517 if (value & b2signbit[b])
519 set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_C, f);
523 set_osz (int value, int b)
525 int mask = b2mask[b];
528 if ((value & mask) == 0)
530 if (value & b2signbit[b])
532 if (value & ~mask && (value & ~mask) != ~mask)
534 set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_O, f);
538 set_sz (int value, int b)
540 int mask = b2mask[b];
543 if ((value & mask) == 0)
545 if (value & b2signbit[b])
547 set_flags (FLAGBIT_Z | FLAGBIT_S, f);
551 set_zc (int z, int c)
553 set_flags (FLAGBIT_C | FLAGBIT_Z,
554 (c ? FLAGBIT_C : 0) | (z ? FLAGBIT_Z : 0));
560 set_flags (FLAGBIT_C, c ? FLAGBIT_C : 0);
564 put_reg_ll (reg_id id, DI v)
566 reg_bank_type *b = regs.r + (FLAG_B ? 1 : 0);
591 static char fn[] = "CDZSBOIU";
592 printf ("%d.", (f >> 12) & 7);
593 for (i = 7; i >= 0; i--)
598 #define TRC(f,n, id) \
599 if (oldregs.f != regs.f) \
601 printf(" %s %0*x:%0*x", n, \
602 reg_bytes[id]*2, (unsigned int)oldregs.f, \
603 reg_bytes[id]*2, (unsigned int)regs.f); \
604 oldregs.f = regs.f; \
608 trace_register_changes ()
612 printf ("\033[36mREGS:");
613 TRC (r[0].r_r0, "r0", r0);
614 TRC (r[0].r_r1, "r1", r1);
615 TRC (r[0].r_r2, "r2", r2);
616 TRC (r[0].r_r3, "r3", r3);
617 TRC (r[0].r_a0, "a0", a0);
618 TRC (r[0].r_a1, "a1", a1);
619 TRC (r[0].r_sb, "sb", sb);
620 TRC (r[0].r_fb, "fb", fb);
621 TRC (r[1].r_r0, "r0'", r0);
622 TRC (r[1].r_r1, "r1'", r1);
623 TRC (r[1].r_r2, "r2'", r2);
624 TRC (r[1].r_r3, "r3'", r3);
625 TRC (r[1].r_a0, "a0'", a0);
626 TRC (r[1].r_a1, "a1'", a1);
627 TRC (r[1].r_sb, "sb'", sb);
628 TRC (r[1].r_fb, "fb'", fb);
629 TRC (r_intbh, "intbh", intbh);
630 TRC (r_intbl, "intbl", intbl);
631 TRC (r_usp, "usp", usp);
632 TRC (r_isp, "isp", isp);
633 TRC (r_pc, "pc", pc);
634 if (oldregs.r_flags != regs.r_flags)
637 print_flags (oldregs.r_flags);
639 print_flags (regs.r_flags);
641 printf ("\033[0m\n");
644 #define DRC(f, n, id) \
645 printf(" %-3s %0*x", n, \
646 reg_bytes[id]*2, (unsigned int)regs.f); \
649 m32c_dump_all_registers ()
651 printf ("\033[36mREGS:");
652 DRC (r[0].r_r0, "r0", r0);
653 DRC (r[0].r_r1, "r1", r1);
654 DRC (r[0].r_r2, "r2", r2);
655 DRC (r[0].r_r3, "r3", r3);
656 DRC (r[0].r_a0, "a0", a0);
657 DRC (r[0].r_a1, "a1", a1);
658 DRC (r[0].r_sb, "sb", sb);
659 DRC (r[0].r_fb, "fb", fb);
661 DRC (r[1].r_r0, "r0'", r0);
662 DRC (r[1].r_r1, "r1'", r1);
663 DRC (r[1].r_r2, "r2'", r2);
664 DRC (r[1].r_r3, "r3'", r3);
665 DRC (r[1].r_a0, "a0'", a0);
666 DRC (r[1].r_a1, "a1'", a1);
667 DRC (r[1].r_sb, "sb'", sb);
668 DRC (r[1].r_fb, "fb'", fb);
670 DRC (r_intbh, "intbh", intbh);
671 DRC (r_intbl, "intbl", intbl);
672 DRC (r_usp, "usp", usp);
673 DRC (r_isp, "isp", isp);
674 DRC (r_pc, "pc", pc);
676 print_flags (regs.r_flags);
677 printf ("\033[0m\n");
678 /*sim_disasm_one (); */