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/>. */
25 #include "libiberty.h"
29 static int src_indirect = 0;
30 static int dest_indirect = 0;
31 static int src_addend = 0;
32 static int dest_addend = 0;
42 rv = mem_get_qi (get_reg (pc));
56 rv = mem_get_hi (get_reg (pc));
70 rv = mem_get_psi (get_reg (pc));
79 return disp24 () & 0x000fffff;
90 *--bp = (v & 1) ? '1' : '0';
97 static const char *the_bits = 0;
100 decode_indirect (int si, int di)
104 if (trace && (si || di))
105 printf ("indirect: s:%d d:%d\n", si, di);
109 decode_index (int sa, int da)
113 if (trace && (sa || da))
114 printf ("index: s:%d d:%d\n", sa, da);
118 decode_srcdest4 (int destcode, int bw)
121 static const char *dc_wnames[16] = { "r0", "r1", "r2", "r3",
122 "a0", "a1", "[a0]", "[a1]",
123 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
124 "disp16[a0]", "disp16[a1]", "disp16[sb]", "disp16"
126 static const char *dc_bnames[4] = { "r0l", "r0h", "r1l", "r1h" };;
128 sd.bytes = bw ? 2 : 1;
129 sd.mem = (destcode >= 6) ? 1 : 0;
133 const char *n = dc_wnames[destcode];
134 if (bw == 0 && destcode <= 3)
135 n = dc_bnames[destcode];
137 the_bits = bits (destcode, 4);
138 printf ("decode: %s (%d) : %s\n", the_bits, destcode, n);
145 sd.u.reg = bw ? r0 : r0l;
148 sd.u.reg = bw ? r1 : r0h;
151 sd.u.reg = bw ? r2 : r1l;
154 sd.u.reg = bw ? r3 : r1h;
163 sd.u.addr = get_reg (a0);
166 sd.u.addr = get_reg (a1);
169 sd.u.addr = get_reg (a0) + disp8 ();
172 sd.u.addr = get_reg (a1) + disp8 ();
175 sd.u.addr = get_reg (sb) + disp8 ();
178 sd.u.addr = get_reg (fb) + sign_ext (disp8 (), 8);
181 sd.u.addr = get_reg (a0) + disp16 ();
184 sd.u.addr = get_reg (a1) + disp16 ();
187 sd.u.addr = get_reg (sb) + disp16 ();
190 sd.u.addr = disp16 ();
196 sd.u.addr &= addr_mask;
201 decode_jumpdest (int destcode, int w)
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" };
211 sd.bytes = w ? 2 : 3;
212 sd.mem = (destcode >= 6) ? 1 : 0;
216 const char *n = dc_wnames[destcode];
217 if (w == 0 && destcode <= 3)
218 n = dc_anames[destcode];
220 the_bits = bits (destcode, 4);
221 printf ("decode: %s : %s\n", the_bits, n);
228 sd.u.reg = w ? r0 : r2r0;
231 sd.u.reg = w ? r1 : r2r0;
234 sd.u.reg = w ? r2 : r3r1;
237 sd.u.reg = w ? r3 : r3r1;
240 sd.u.reg = w ? a0 : a1a0;
243 sd.u.reg = w ? a1 : a1a0;
246 sd.u.addr = get_reg (a0);
249 sd.u.addr = get_reg (a1);
252 sd.u.addr = get_reg (a0) + disp8 ();
255 sd.u.addr = get_reg (a1) + disp8 ();
258 sd.u.addr = get_reg (sb) + disp8 ();
261 sd.u.addr = get_reg (fb) + sign_ext (disp8 (), 8);
264 sd.u.addr = get_reg (a0) + disp20 ();
267 sd.u.addr = get_reg (a1) + disp20 ();
270 sd.u.addr = get_reg (sb) + disp16 ();
273 sd.u.addr = disp16 ();
279 sd.u.addr &= addr_mask;
284 decode_dest3 (int destcode, int bw)
286 static char map[8] = { -1, -1, -1, 1, 0, 10, 11, 15 };
288 the_bits = bits (destcode, 3);
289 return decode_srcdest4 (map[destcode], bw);
293 decode_src2 (int srccode, int bw, int d)
295 static char map[4] = { 0, 10, 11, 15 };
297 the_bits = bits (srccode, 2);
298 return decode_srcdest4 (srccode ? map[srccode] : 1 - d, bw);
311 a0, a0, 1, 0, "[A0]"}, /* 0 0 0 0 0 */
313 a1, a1, 1, 0, "[A1]"}, /* 0 0 0 0 1 */
315 a0, a0, 0, 0, "A0"}, /* 0 0 0 1 0 */
317 a1, a1, 0, 0, "A1"}, /* 0 0 0 1 1 */
319 a0, a0, 1, 1, "dsp:8[A0]"}, /* 0 0 1 0 0 */
321 a1, a1, 1, 1, "dsp:8[A1]"}, /* 0 0 1 0 1 */
323 sb, sb, 1, 1, "dsp:8[SB]"}, /* 0 0 1 1 0 */
325 fb, fb, 1, -1, "dsp:8[FB]"}, /* 0 0 1 1 1 */
327 a0, a0, 1, 2, "dsp:16[A0]"}, /* 0 1 0 0 0 */
329 a1, a1, 1, 2, "dsp:16[A1]"}, /* 0 1 0 0 1 */
331 sb, sb, 1, 2, "dsp:16[SB]"}, /* 0 1 0 1 0 */
333 fb, fb, 1, -2, "dsp:16[FB]"}, /* 0 1 0 1 1 */
335 a0, a0, 1, 3, "dsp:24[A0]"}, /* 0 1 1 0 0 */
337 a1, a1, 1, 3, "dsp:24[A1]"}, /* 0 1 1 0 1 */
339 mem, mem, 1, 3, "abs24"}, /* 0 1 1 1 0 */
341 mem, mem, 1, 2, "abs16"}, /* 0 1 1 1 1 */
343 r0h, r2, 0, 0, "R0H/R2"}, /* 1 0 0 0 0 */
345 r1h, r3, 0, 0, "R1H/R3"}, /* 1 0 0 0 1 */
347 r0l, r0, 0, 0, "R0L/R0"}, /* 1 0 0 1 0 */
349 r1l, r1, 0, 0, "R1L/R1"}, /* 1 0 0 1 1 */
353 decode_sd23 (int bbb, int bb, int bytes, int ind, int add)
356 int code = (bbb << 2) | bb;
358 if (code >= ARRAY_SIZE (modes23))
372 sprintf (ad, "%+d", add);
376 the_bits = bits (code, 4);
377 printf ("decode: %s (%d) : %s%s%s%s\n", the_bits, code, b1,
378 modes23[code].name, ad, b2);
383 sd.mem = modes23[code].is_memory;
386 if (modes23[code].w_regno == mem)
389 sd.u.addr = get_reg (modes23[code].w_regno);
390 switch (modes23[code].disp_bytes)
393 sd.u.addr += disp8 ();
396 sd.u.addr += disp16 ();
399 sd.u.addr += sign_ext (disp8 (), 8);
402 sd.u.addr += sign_ext (disp16 (), 16);
405 sd.u.addr += disp24 ();
413 sd.u.addr = mem_get_si (sd.u.addr & membus_mask);
414 sd.u.addr &= membus_mask;
418 sd.u.reg = (bytes > 1) ? modes23[code].w_regno : modes23[code].b_regno;
419 if (bytes == 3 || bytes == 4)
442 decode_dest23 (int ddd, int dd, int bytes)
444 return decode_sd23 (ddd, dd, bytes, dest_indirect, dest_addend);
448 decode_src23 (int sss, int ss, int bytes)
450 return decode_sd23 (sss, ss, bytes, src_indirect, src_addend);
454 decode_dest2 (int dd, int bytes)
456 /* r0l/r0, abs16, dsp:8[SB], dsp:8[FB] */
457 static char map[4] = { 0x12, 0x0f, 0x06, 0x07 };
459 the_bits = bits (dd, 2);
460 return decode_sd23 (map[dd] >> 2, map[dd] & 3, bytes, dest_indirect,
465 decode_src3 (int sss, int bytes)
467 /* r0, r1, a0, a1, r2, r3, N/A, N/A */
468 static char map[8] = { 0x12, 0x13, 0x02, 0x03, 0x10, 0x11, 0, 0 };
470 the_bits = bits (sss, 3);
471 return decode_sd23 (map[sss] >> 2, map[sss] & 3, bytes, src_indirect,
476 decode_dest1 (int destcode, int bw)
478 the_bits = bits (destcode, 1);
479 return decode_srcdest4 (destcode, bw);
483 decode_cr (int crcode)
485 static int regcode[] = { 0, intbl, intbh, flags, isp, sp, sb, fb };
489 sd.u.reg = regcode[crcode & 7];
494 decode_cr_b (int crcode, int bank)
496 /* FIXME: intbl, intbh, isp */
497 static int regcode[3][8] = {
498 {0, 0, flags, 0, 0, 0, 0, 0},
499 {intb, sp, sb, fb, 0, 0, 0, isp},
500 {0, 0, 0, 0, 0, 0, 0, 0}
504 sd.bytes = bank ? 3 : 2;
505 sd.u.reg = regcode[bank][crcode & 7];
510 widen_sd (srcdest sd)
542 rv.bytes = reg_bytes[reg];
557 v = mem_get_qi (sd.u.addr);
560 v = mem_get_hi (sd.u.addr);
563 v = mem_get_psi (sd.u.addr);
566 v = mem_get_si (sd.u.addr);
574 v = get_reg (sd.u.reg);
592 put_dest (srcdest sd, int v)
599 mem_put_qi (sd.u.addr, v);
602 mem_put_hi (sd.u.addr, v);
605 mem_put_psi (sd.u.addr, v);
608 mem_put_si (sd.u.addr, v);
626 put_reg (sd.u.reg, v);
631 decode_bit (int destcode)
635 static const char *dc_names[] = { "r0", "r1", "r2", "r3",
636 "a0", "a1", "[a0]", "[a1]",
637 "disp8[a0]", "disp8[a1]", "disp8[sb]", "disp8[fb]",
638 "disp16[a0]", "disp16[a1]", "disp16[sb]", "abs16"
643 const char *the_bits = bits (destcode, 4);
644 printf ("decode: %s : %s\n", the_bits, dc_names[destcode]);
674 addr = get_reg (a0) + disp8 ();
677 addr = get_reg (a1) + disp8 ();
680 addr = get_reg (sb) * 8 + disp8 ();
683 addr = get_reg (fb) * 8 + sign_ext (disp8 (), 8);
686 addr = get_reg (a0) + disp16 ();
689 addr = get_reg (a1) + disp16 ();
692 addr = get_reg (sb) + disp16 ();
703 sd.mask = 1 << (d & 0x0f);
709 sd.mask = 1 << (addr & 7);
710 sd.u.addr = addr >> 3;
716 decode_bit11 (int op0)
719 sd.mask = 1 << (op0 & 7);
721 sd.u.addr = get_reg (sb) + disp8 ();
730 b = mem_get_qi (sd.u.addr) & sd.mask;
732 b = get_reg (sd.u.reg) & sd.mask;
737 put_bit (srcdest sd, int val)
741 b = mem_get_qi (sd.u.addr);
743 b = get_reg (sd.u.reg);
749 mem_put_qi (sd.u.addr, b);
751 put_reg (sd.u.reg, b);
755 get_bit2 (srcdest sd, int bit)
759 b = mem_get_qi (sd.u.addr + (bit >> 3)) & (1 << (bit & 7));
761 b = get_reg (sd.u.reg) & (1 << bit);
766 put_bit2 (srcdest sd, int bit, int val)
770 b = mem_get_qi (sd.u.addr + (bit >> 3));
772 b = get_reg (sd.u.reg);
774 b |= (1 << (bit & 7));
776 b &= ~(1 << (bit & 7));
778 mem_put_qi (sd.u.addr + (bit >> 3), b);
780 put_reg (sd.u.reg, b);