1 /* srcdest.c --- decoding M32C addressing modes.
3 Copyright (C) 2005-2017 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/>. */
28 static int src_indirect = 0;
29 static int dest_indirect = 0;
30 static int src_addend = 0;
31 static int dest_addend = 0;
41 rv = mem_get_qi (get_reg (pc));
55 rv = mem_get_hi (get_reg (pc));
69 rv = mem_get_psi (get_reg (pc));
78 return disp24 () & 0x000fffff;
89 *--bp = (v & 1) ? '1' : '0';
96 static const char *the_bits = 0;
99 decode_indirect (int si, int di)
103 if (trace && (si || di))
104 printf ("indirect: s:%d d:%d\n", si, di);
108 decode_index (int sa, int da)
112 if (trace && (sa || da))
113 printf ("index: s:%d d:%d\n", sa, da);
117 decode_srcdest4 (int destcode, int bw)
120 static const char *dc_wnames[16] = { "r0", "r1", "r2", "r3",
121 "a0", "a1", "[a0]", "[a1]",
122 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
123 "disp16[a0]", "disp16[a1]", "disp16[sb]", "disp16"
125 static const char *dc_bnames[4] = { "r0l", "r0h", "r1l", "r1h" };;
127 sd.bytes = bw ? 2 : 1;
128 sd.mem = (destcode >= 6) ? 1 : 0;
132 const char *n = dc_wnames[destcode];
133 if (bw == 0 && destcode <= 3)
134 n = dc_bnames[destcode];
136 the_bits = bits (destcode, 4);
137 printf ("decode: %s (%d) : %s\n", the_bits, destcode, n);
144 sd.u.reg = bw ? r0 : r0l;
147 sd.u.reg = bw ? r1 : r0h;
150 sd.u.reg = bw ? r2 : r1l;
153 sd.u.reg = bw ? r3 : r1h;
162 sd.u.addr = get_reg (a0);
165 sd.u.addr = get_reg (a1);
168 sd.u.addr = get_reg (a0) + disp8 ();
171 sd.u.addr = get_reg (a1) + disp8 ();
174 sd.u.addr = get_reg (sb) + disp8 ();
177 sd.u.addr = get_reg (fb) + sign_ext (disp8 (), 8);
180 sd.u.addr = get_reg (a0) + disp16 ();
183 sd.u.addr = get_reg (a1) + disp16 ();
186 sd.u.addr = get_reg (sb) + disp16 ();
189 sd.u.addr = disp16 ();
195 sd.u.addr &= addr_mask;
200 decode_jumpdest (int destcode, int w)
203 static const char *dc_wnames[16] = { "r0", "r1", "r2", "r3",
204 "a0", "a1", "[a0]", "[a1]",
205 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
206 "disp20[a0]", "disp20[a1]", "disp16[sb]", "abs16"
208 static const char *dc_anames[4] = { "r0l", "r0h", "r1l", "r1h" };
210 sd.bytes = w ? 2 : 3;
211 sd.mem = (destcode >= 6) ? 1 : 0;
215 const char *n = dc_wnames[destcode];
216 if (w == 0 && destcode <= 3)
217 n = dc_anames[destcode];
219 the_bits = bits (destcode, 4);
220 printf ("decode: %s : %s\n", the_bits, n);
227 sd.u.reg = w ? r0 : r2r0;
230 sd.u.reg = w ? r1 : r2r0;
233 sd.u.reg = w ? r2 : r3r1;
236 sd.u.reg = w ? r3 : r3r1;
239 sd.u.reg = w ? a0 : a1a0;
242 sd.u.reg = w ? a1 : a1a0;
245 sd.u.addr = get_reg (a0);
248 sd.u.addr = get_reg (a1);
251 sd.u.addr = get_reg (a0) + disp8 ();
254 sd.u.addr = get_reg (a1) + disp8 ();
257 sd.u.addr = get_reg (sb) + disp8 ();
260 sd.u.addr = get_reg (fb) + sign_ext (disp8 (), 8);
263 sd.u.addr = get_reg (a0) + disp20 ();
266 sd.u.addr = get_reg (a1) + disp20 ();
269 sd.u.addr = get_reg (sb) + disp16 ();
272 sd.u.addr = disp16 ();
278 sd.u.addr &= addr_mask;
283 decode_dest3 (int destcode, int bw)
285 static char map[8] = { -1, -1, -1, 1, 0, 10, 11, 15 };
287 the_bits = bits (destcode, 3);
288 return decode_srcdest4 (map[destcode], bw);
292 decode_src2 (int srccode, int bw, int d)
294 static char map[4] = { 0, 10, 11, 15 };
296 the_bits = bits (srccode, 2);
297 return decode_srcdest4 (srccode ? map[srccode] : 1 - d, bw);
310 a0, a0, 1, 0, "[A0]"}, /* 0 0 0 0 0 */
312 a1, a1, 1, 0, "[A1]"}, /* 0 0 0 0 1 */
314 a0, a0, 0, 0, "A0"}, /* 0 0 0 1 0 */
316 a1, a1, 0, 0, "A1"}, /* 0 0 0 1 1 */
318 a0, a0, 1, 1, "dsp:8[A0]"}, /* 0 0 1 0 0 */
320 a1, a1, 1, 1, "dsp:8[A1]"}, /* 0 0 1 0 1 */
322 sb, sb, 1, 1, "dsp:8[SB]"}, /* 0 0 1 1 0 */
324 fb, fb, 1, -1, "dsp:8[FB]"}, /* 0 0 1 1 1 */
326 a0, a0, 1, 2, "dsp:16[A0]"}, /* 0 1 0 0 0 */
328 a1, a1, 1, 2, "dsp:16[A1]"}, /* 0 1 0 0 1 */
330 sb, sb, 1, 2, "dsp:16[SB]"}, /* 0 1 0 1 0 */
332 fb, fb, 1, -2, "dsp:16[FB]"}, /* 0 1 0 1 1 */
334 a0, a0, 1, 3, "dsp:24[A0]"}, /* 0 1 1 0 0 */
336 a1, a1, 1, 3, "dsp:24[A1]"}, /* 0 1 1 0 1 */
338 mem, mem, 1, 3, "abs24"}, /* 0 1 1 1 0 */
340 mem, mem, 1, 2, "abs16"}, /* 0 1 1 1 1 */
342 r0h, r2, 0, 0, "R0H/R2"}, /* 1 0 0 0 0 */
344 r1h, r3, 0, 0, "R1H/R3"}, /* 1 0 0 0 1 */
346 r0l, r0, 0, 0, "R0L/R0"}, /* 1 0 0 1 0 */
348 r1l, r1, 0, 0, "R1L/R1"}, /* 1 0 0 1 1 */
352 decode_sd23 (int bbb, int bb, int bytes, int ind, int add)
355 int code = (bbb << 2) | bb;
357 if (code >= sizeof (modes23) / sizeof (modes23[0]))
371 sprintf (ad, "%+d", add);
375 the_bits = bits (code, 4);
376 printf ("decode: %s (%d) : %s%s%s%s\n", the_bits, code, b1,
377 modes23[code].name, ad, b2);
382 sd.mem = modes23[code].is_memory;
385 if (modes23[code].w_regno == mem)
388 sd.u.addr = get_reg (modes23[code].w_regno);
389 switch (modes23[code].disp_bytes)
392 sd.u.addr += disp8 ();
395 sd.u.addr += disp16 ();
398 sd.u.addr += sign_ext (disp8 (), 8);
401 sd.u.addr += sign_ext (disp16 (), 16);
404 sd.u.addr += disp24 ();
412 sd.u.addr = mem_get_si (sd.u.addr & membus_mask);
413 sd.u.addr &= membus_mask;
417 sd.u.reg = (bytes > 1) ? modes23[code].w_regno : modes23[code].b_regno;
418 if (bytes == 3 || bytes == 4)
441 decode_dest23 (int ddd, int dd, int bytes)
443 return decode_sd23 (ddd, dd, bytes, dest_indirect, dest_addend);
447 decode_src23 (int sss, int ss, int bytes)
449 return decode_sd23 (sss, ss, bytes, src_indirect, src_addend);
453 decode_dest2 (int dd, int bytes)
455 /* r0l/r0, abs16, dsp:8[SB], dsp:8[FB] */
456 static char map[4] = { 0x12, 0x0f, 0x06, 0x07 };
458 the_bits = bits (dd, 2);
459 return decode_sd23 (map[dd] >> 2, map[dd] & 3, bytes, dest_indirect,
464 decode_src3 (int sss, int bytes)
466 /* r0, r1, a0, a1, r2, r3, N/A, N/A */
467 static char map[8] = { 0x12, 0x13, 0x02, 0x03, 0x10, 0x11, 0, 0 };
469 the_bits = bits (sss, 3);
470 return decode_sd23 (map[sss] >> 2, map[sss] & 3, bytes, src_indirect,
475 decode_dest1 (int destcode, int bw)
477 the_bits = bits (destcode, 1);
478 return decode_srcdest4 (destcode, bw);
482 decode_cr (int crcode)
484 static int regcode[] = { 0, intbl, intbh, flags, isp, sp, sb, fb };
488 sd.u.reg = regcode[crcode & 7];
493 decode_cr_b (int crcode, int bank)
495 /* FIXME: intbl, intbh, isp */
496 static int regcode[3][8] = {
497 {0, 0, flags, 0, 0, 0, 0, 0},
498 {intb, sp, sb, fb, 0, 0, 0, isp},
499 {0, 0, 0, 0, 0, 0, 0, 0}
503 sd.bytes = bank ? 3 : 2;
504 sd.u.reg = regcode[bank][crcode & 7];
509 widen_sd (srcdest sd)
541 rv.bytes = reg_bytes[reg];
556 v = mem_get_qi (sd.u.addr);
559 v = mem_get_hi (sd.u.addr);
562 v = mem_get_psi (sd.u.addr);
565 v = mem_get_si (sd.u.addr);
573 v = get_reg (sd.u.reg);
591 put_dest (srcdest sd, int v)
598 mem_put_qi (sd.u.addr, v);
601 mem_put_hi (sd.u.addr, v);
604 mem_put_psi (sd.u.addr, v);
607 mem_put_si (sd.u.addr, v);
625 put_reg (sd.u.reg, v);
630 decode_bit (int destcode)
634 static const char *dc_names[] = { "r0", "r1", "r2", "r3",
635 "a0", "a1", "[a0]", "[a1]",
636 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
637 "disp16[a0]", "disp16[a1]", "disp16[sb]", "abs16"
642 const char *the_bits = bits (destcode, 4);
643 printf ("decode: %s : %s\n", the_bits, dc_names[destcode]);
673 addr = get_reg (a0) + disp8 ();
676 addr = get_reg (a1) + disp8 ();
679 addr = get_reg (sb) * 8 + disp8 ();
682 addr = get_reg (fb) * 8 + sign_ext (disp8 (), 8);
685 addr = get_reg (a0) + disp16 ();
688 addr = get_reg (a1) + disp16 ();
691 addr = get_reg (sb) + disp16 ();
702 sd.mask = 1 << (d & 0x0f);
708 sd.mask = 1 << (addr & 7);
709 sd.u.addr = addr >> 3;
715 decode_bit11 (int op0)
718 sd.mask = 1 << (op0 & 7);
720 sd.u.addr = get_reg (sb) + disp8 ();
729 b = mem_get_qi (sd.u.addr) & sd.mask;
731 b = get_reg (sd.u.reg) & sd.mask;
736 put_bit (srcdest sd, int val)
740 b = mem_get_qi (sd.u.addr);
742 b = get_reg (sd.u.reg);
748 mem_put_qi (sd.u.addr, b);
750 put_reg (sd.u.reg, b);
754 get_bit2 (srcdest sd, int bit)
758 b = mem_get_qi (sd.u.addr + (bit >> 3)) & (1 << (bit & 7));
760 b = get_reg (sd.u.reg) & (1 << bit);
765 put_bit2 (srcdest sd, int bit, int val)
769 b = mem_get_qi (sd.u.addr + (bit >> 3));
771 b = get_reg (sd.u.reg);
773 b |= (1 << (bit & 7));
775 b &= ~(1 << (bit & 7));
777 mem_put_qi (sd.u.addr + (bit >> 3), b);
779 put_reg (sd.u.reg, b);