1 /* srcdest.c --- decoding M32C addressing modes.
3 Copyright (C) 2005, 2007, 2008 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 sd.bytes = bw ? 2 : 1;
121 sd.mem = (destcode >= 6) ? 1 : 0;
122 static const char *dc_wnames[16] = { "r0", "r1", "r2", "r3",
123 "a0", "a1", "[a0]", "[a1]",
124 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
125 "disp16[a0]", "disp16[a1]", "disp16[sb]", "disp16"
127 static const char *dc_bnames[4] = { "r0l", "r0h", "r1l", "r1h" };;
131 const char *n = dc_wnames[destcode];
132 if (bw == 0 && destcode <= 3)
133 n = dc_bnames[destcode];
135 the_bits = bits (destcode, 4);
136 printf ("decode: %s (%d) : %s\n", the_bits, destcode, n);
143 sd.u.reg = bw ? r0 : r0l;
146 sd.u.reg = bw ? r1 : r0h;
149 sd.u.reg = bw ? r2 : r1l;
152 sd.u.reg = bw ? r3 : r1h;
161 sd.u.addr = get_reg (a0);
164 sd.u.addr = get_reg (a1);
167 sd.u.addr = get_reg (a0) + disp8 ();
170 sd.u.addr = get_reg (a1) + disp8 ();
173 sd.u.addr = get_reg (sb) + disp8 ();
176 sd.u.addr = get_reg (fb) + sign_ext (disp8 (), 8);
179 sd.u.addr = get_reg (a0) + disp16 ();
182 sd.u.addr = get_reg (a1) + disp16 ();
185 sd.u.addr = get_reg (sb) + disp16 ();
188 sd.u.addr = disp16 ();
194 sd.u.addr &= addr_mask;
199 decode_jumpdest (int destcode, int w)
202 sd.bytes = w ? 2 : 3;
203 sd.mem = (destcode >= 6) ? 1 : 0;
204 static const char *dc_wnames[16] = { "r0", "r1", "r2", "r3",
205 "a0", "a1", "[a0]", "[a1]",
206 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
207 "disp20[a0]", "disp20[a1]", "disp16[sb]", "abs16"
209 static const char *dc_anames[4] = { "r0l", "r0h", "r1l", "r1h" };
213 const char *n = dc_wnames[destcode];
214 if (w == 0 && destcode <= 3)
215 n = dc_anames[destcode];
217 the_bits = bits (destcode, 4);
218 printf ("decode: %s : %s\n", the_bits, n);
225 sd.u.reg = w ? r0 : r2r0;
228 sd.u.reg = w ? r1 : r2r0;
231 sd.u.reg = w ? r2 : r3r1;
234 sd.u.reg = w ? r3 : r3r1;
237 sd.u.reg = w ? a0 : a1a0;
240 sd.u.reg = w ? a1 : a1a0;
243 sd.u.addr = get_reg (a0);
246 sd.u.addr = get_reg (a1);
249 sd.u.addr = get_reg (a0) + disp8 ();
252 sd.u.addr = get_reg (a1) + disp8 ();
255 sd.u.addr = get_reg (sb) + disp8 ();
258 sd.u.addr = get_reg (fb) + sign_ext (disp8 (), 8);
261 sd.u.addr = get_reg (a0) + disp20 ();
264 sd.u.addr = get_reg (a1) + disp20 ();
267 sd.u.addr = get_reg (sb) + disp16 ();
270 sd.u.addr = disp16 ();
276 sd.u.addr &= addr_mask;
281 decode_dest3 (int destcode, int bw)
283 static char map[8] = { -1, -1, -1, 1, 0, 10, 11, 15 };
285 the_bits = bits (destcode, 3);
286 return decode_srcdest4 (map[destcode], bw);
290 decode_src2 (int srccode, int bw, int d)
292 static char map[4] = { 0, 10, 11, 15 };
294 the_bits = bits (srccode, 2);
295 return decode_srcdest4 (srccode ? map[srccode] : 1 - d, bw);
308 a0, a0, 1, 0, "[A0]"}, /* 0 0 0 0 0 */
310 a1, a1, 1, 0, "[A1]"}, /* 0 0 0 0 1 */
312 a0, a0, 0, 0, "A0"}, /* 0 0 0 1 0 */
314 a1, a1, 0, 0, "A1"}, /* 0 0 0 1 1 */
316 a0, a0, 1, 1, "dsp:8[A0]"}, /* 0 0 1 0 0 */
318 a1, a1, 1, 1, "dsp:8[A1]"}, /* 0 0 1 0 1 */
320 sb, sb, 1, 1, "dsp:8[SB]"}, /* 0 0 1 1 0 */
322 fb, fb, 1, -1, "dsp:8[FB]"}, /* 0 0 1 1 1 */
324 a0, a0, 1, 2, "dsp:16[A0]"}, /* 0 1 0 0 0 */
326 a1, a1, 1, 2, "dsp:16[A1]"}, /* 0 1 0 0 1 */
328 sb, sb, 1, 2, "dsp:16[SB]"}, /* 0 1 0 1 0 */
330 fb, fb, 1, -2, "dsp:16[FB]"}, /* 0 1 0 1 1 */
332 a0, a0, 1, 3, "dsp:24[A0]"}, /* 0 1 1 0 0 */
334 a1, a1, 1, 3, "dsp:24[A1]"}, /* 0 1 1 0 1 */
336 mem, mem, 1, 3, "abs24"}, /* 0 1 1 1 0 */
338 mem, mem, 1, 2, "abs16"}, /* 0 1 1 1 1 */
340 r0h, r2, 0, 0, "R0H/R2"}, /* 1 0 0 0 0 */
342 r1h, r3, 0, 0, "R1H/R3"}, /* 1 0 0 0 1 */
344 r0l, r0, 0, 0, "R0L/R0"}, /* 1 0 0 1 0 */
346 r1l, r1, 0, 0, "R1L/R1"}, /* 1 0 0 1 1 */
350 decode_sd23 (int bbb, int bb, int bytes, int ind, int add)
353 int code = (bbb << 2) | bb;
355 if (code >= sizeof (modes23) / sizeof (modes23[0]))
369 sprintf (ad, "%+d", add);
373 the_bits = bits (code, 4);
374 printf ("decode: %s (%d) : %s%s%s%s\n", the_bits, code, b1,
375 modes23[code].name, ad, b2);
380 sd.mem = modes23[code].is_memory;
383 if (modes23[code].w_regno == mem)
386 sd.u.addr = get_reg (modes23[code].w_regno);
387 switch (modes23[code].disp_bytes)
390 sd.u.addr += disp8 ();
393 sd.u.addr += disp16 ();
396 sd.u.addr += sign_ext (disp8 (), 8);
399 sd.u.addr += sign_ext (disp16 (), 16);
402 sd.u.addr += disp24 ();
410 sd.u.addr = mem_get_si (sd.u.addr & membus_mask);
411 sd.u.addr &= membus_mask;
415 sd.u.reg = (bytes > 1) ? modes23[code].w_regno : modes23[code].b_regno;
416 if (bytes == 3 || bytes == 4)
439 decode_dest23 (int ddd, int dd, int bytes)
441 return decode_sd23 (ddd, dd, bytes, dest_indirect, dest_addend);
445 decode_src23 (int sss, int ss, int bytes)
447 return decode_sd23 (sss, ss, bytes, src_indirect, src_addend);
451 decode_dest2 (int dd, int bytes)
453 /* r0l/r0, abs16, dsp:8[SB], dsp:8[FB] */
454 static char map[4] = { 0x12, 0x0f, 0x06, 0x07 };
456 the_bits = bits (dd, 2);
457 return decode_sd23 (map[dd] >> 2, map[dd] & 3, bytes, dest_indirect,
462 decode_src3 (int sss, int bytes)
464 /* r0, r1, a0, a1, r2, r3, N/A, N/A */
465 static char map[8] = { 0x12, 0x13, 0x02, 0x03, 0x10, 0x11, 0, 0 };
467 the_bits = bits (sss, 3);
468 return decode_sd23 (map[sss] >> 2, map[sss] & 3, bytes, src_indirect,
473 decode_dest1 (int destcode, int bw)
475 the_bits = bits (destcode, 1);
476 return decode_srcdest4 (destcode, bw);
480 decode_cr (int crcode)
482 static int regcode[] = { 0, intbl, intbh, flags, isp, sp, sb, fb };
486 sd.u.reg = regcode[crcode & 7];
491 decode_cr_b (int crcode, int bank)
493 /* FIXME: intbl, intbh, isp */
494 static int regcode[3][8] = {
495 {0, 0, flags, 0, 0, 0, 0, 0},
496 {intb, sp, sb, fb, 0, 0, 0, isp},
497 {0, 0, 0, 0, 0, 0, 0, 0}
501 sd.bytes = bank ? 3 : 2;
502 sd.u.reg = regcode[bank][crcode & 7];
507 widen_sd (srcdest sd)
539 rv.bytes = reg_bytes[reg];
554 v = mem_get_qi (sd.u.addr);
557 v = mem_get_hi (sd.u.addr);
560 v = mem_get_psi (sd.u.addr);
563 v = mem_get_si (sd.u.addr);
571 v = get_reg (sd.u.reg);
589 put_dest (srcdest sd, int v)
596 mem_put_qi (sd.u.addr, v);
599 mem_put_hi (sd.u.addr, v);
602 mem_put_psi (sd.u.addr, v);
605 mem_put_si (sd.u.addr, v);
623 put_reg (sd.u.reg, v);
628 decode_bit (int destcode)
632 static const char *dc_names[] = { "r0", "r1", "r2", "r3",
633 "a0", "a1", "[a0]", "[a1]",
634 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
635 "disp16[a0]", "disp16[a1]", "disp16[sb]", "abs16"
640 const char *the_bits = bits (destcode, 4);
641 printf ("decode: %s : %s\n", the_bits, dc_names[destcode]);
671 addr = get_reg (a0) + disp8 ();
674 addr = get_reg (a1) + disp8 ();
677 addr = get_reg (sb) * 8 + disp8 ();
680 addr = get_reg (fb) * 8 + sign_ext (disp8 (), 8);
683 addr = get_reg (a0) + disp16 ();
686 addr = get_reg (a1) + disp16 ();
689 addr = get_reg (sb) + disp16 ();
700 sd.mask = 1 << (d & 0x0f);
706 sd.mask = 1 << (addr & 7);
707 sd.u.addr = addr >> 3;
713 decode_bit11 (int op0)
716 sd.mask = 1 << (op0 & 7);
718 sd.u.addr = get_reg (sb) + disp8 ();
727 b = mem_get_qi (sd.u.addr) & sd.mask;
729 b = get_reg (sd.u.reg) & sd.mask;
734 put_bit (srcdest sd, int val)
738 b = mem_get_qi (sd.u.addr);
740 b = get_reg (sd.u.reg);
746 mem_put_qi (sd.u.addr, b);
748 put_reg (sd.u.reg, b);
752 get_bit2 (srcdest sd, int bit)
756 b = mem_get_qi (sd.u.addr + (bit >> 3)) & (1 << (bit & 7));
758 b = get_reg (sd.u.reg) & (1 << bit);
763 put_bit2 (srcdest sd, int bit, int val)
767 b = mem_get_qi (sd.u.addr + (bit >> 3));
769 b = get_reg (sd.u.reg);
771 b |= (1 << (bit & 7));
773 b &= ~(1 << (bit & 7));
775 mem_put_qi (sd.u.addr + (bit >> 3), b);
777 put_reg (sd.u.reg, b);