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1.1 root 1: /*
2: * UAE - The Un*x Amiga Emulator
3: *
4: * MC68000 emulation generator
5: *
6: * This is a fairly stupid program that generates a lot of case labels that
7: * can be #included in a switch statement.
8: * As an alternative, it can generate functions that handle specific
9: * MC68000 instructions, plus a prototype header file and a function pointer
10: * array to look up the function for an opcode.
11: * Error checking is bad, an illegal table68k file will cause the program to
12: * call abort().
13: * The generated code is sometimes sub-optimal, an optimizing compiler should
14: * take care of this.
15: *
16: * The source for the insn timings is Markt & Technik's Amiga Magazin 8/1992.
17: *
18: * Copyright 1995, 1996, 1997, 1998, 1999, 2000 Bernd Schmidt
19: */
20:
21: #include <ctype.h>
22:
23: /*
24: #include "sysconfig.h"
25: #include "config.h"
26: #include "options.h"
27: */
28: #include "sysdeps.h"
29: #include "readcpu.h"
30:
31: #define BOOL_TYPE "int"
32:
33: static FILE *headerfile;
34: static FILE *stblfile;
35:
36: static int using_prefetch;
37: static int using_exception_3;
38: static int cpu_level;
39:
40: /* For the current opcode, the next lower level that will have different code.
41: * Initialized to -1 for each opcode. If it remains unchanged, indicates we
42: * are done with that opcode. */
43: static int next_cpu_level;
44:
45: void write_log (const char *s, ...)
46: {
47: fprintf (stderr, "%s", s);
48: }
49:
50: static int *opcode_map;
51: static int *opcode_next_clev;
52: static int *opcode_last_postfix;
53: static unsigned long *counts;
54:
55: static void read_counts (void)
56: {
57: FILE *file;
58: unsigned long opcode, count, total;
59: char name[20];
60: int nr = 0;
61: memset (counts, 0, 65536 * sizeof *counts);
62:
63: file = fopen ("frequent.68k", "r");
64: if (file) {
65: fscanf (file, "Total: %lu\n", &total);
66: while (fscanf (file, "%lx: %lu %s\n", &opcode, &count, name) == 3) {
67: opcode_next_clev[nr] = 4;
68: opcode_last_postfix[nr] = -1;
69: opcode_map[nr++] = opcode;
70: counts[opcode] = count;
71: }
72: fclose (file);
73: }
74: if (nr == nr_cpuop_funcs)
75: return;
76: for (opcode = 0; opcode < 0x10000; opcode++) {
77: if (table68k[opcode].handler == -1 && table68k[opcode].mnemo != i_ILLG
78: && counts[opcode] == 0)
79: {
80: opcode_next_clev[nr] = 4;
81: opcode_last_postfix[nr] = -1;
82: opcode_map[nr++] = opcode;
83: counts[opcode] = count;
84: }
85: }
86: if (nr != nr_cpuop_funcs)
87: abort ();
88: }
89:
90: static char endlabelstr[80];
91: static int endlabelno = 0;
92: static int need_endlabel;
93:
94: static int n_braces = 0;
95: static int m68k_pc_offset = 0;
96: static int insn_n_cycles;
97:
98: static void start_brace (void)
99: {
100: n_braces++;
101: printf ("{");
102: }
103:
104: static void close_brace (void)
105: {
106: assert (n_braces > 0);
107: n_braces--;
108: printf ("}");
109: }
110:
111: static void finish_braces (void)
112: {
113: while (n_braces > 0)
114: close_brace ();
115: }
116:
117: static void pop_braces (int to)
118: {
119: while (n_braces > to)
120: close_brace ();
121: }
122:
123: static int bit_size (int size)
124: {
125: switch (size) {
126: case sz_byte: return 8;
127: case sz_word: return 16;
128: case sz_long: return 32;
129: default: abort ();
130: }
131: return 0;
132: }
133:
134: static const char *bit_mask (int size)
135: {
136: switch (size) {
137: case sz_byte: return "0xff";
138: case sz_word: return "0xffff";
139: case sz_long: return "0xffffffff";
140: default: abort ();
141: }
142: return 0;
143: }
144:
145: static const char *gen_nextilong (void)
146: {
147: static char buffer[80];
148: int r = m68k_pc_offset;
149: m68k_pc_offset += 4;
150:
151: insn_n_cycles += 8;
152:
153: if (using_prefetch)
154: sprintf (buffer, "get_ilong_prefetch(%d)", r);
155: else
156: sprintf (buffer, "get_ilong(%d)", r);
157: return buffer;
158: }
159:
160: static const char *gen_nextiword (void)
161: {
162: static char buffer[80];
163: int r = m68k_pc_offset;
164: m68k_pc_offset += 2;
165:
166: insn_n_cycles += 4;
167:
168: if (using_prefetch)
169: sprintf (buffer, "get_iword_prefetch(%d)", r);
170: else
171: sprintf (buffer, "get_iword(%d)", r);
172: return buffer;
173: }
174:
175: static const char *gen_nextibyte (void)
176: {
177: static char buffer[80];
178: int r = m68k_pc_offset;
179: m68k_pc_offset += 2;
180:
181: insn_n_cycles += 4;
182:
183: if (using_prefetch)
184: sprintf (buffer, "get_ibyte_prefetch(%d)", r);
185: else
186: sprintf (buffer, "get_ibyte(%d)", r);
187: return buffer;
188: }
189:
190: static void fill_prefetch_0 (void)
191: {
192: if (using_prefetch)
193: printf ("fill_prefetch_0 ();\n");
194: }
195:
196: static void fill_prefetch_2 (void)
197: {
198: if (using_prefetch)
199: printf ("fill_prefetch_2 ();\n");
200: }
201:
202: static void sync_m68k_pc (void)
203: {
204: if (m68k_pc_offset == 0)
205: return;
206: printf ("m68k_incpc(%d);\n", m68k_pc_offset);
207: switch (m68k_pc_offset) {
208: case 0:
209: /*fprintf (stderr, "refilling prefetch at 0\n"); */
210: break;
211: case 2:
212: fill_prefetch_2 ();
213: break;
214: default:
215: fill_prefetch_0 ();
216: break;
217: }
218: m68k_pc_offset = 0;
219: }
220:
221: /* getv == 1: fetch data; getv != 0: check for odd address. If movem != 0,
222: * the calling routine handles Apdi and Aipi modes. */
223: static void genamode (amodes mode, char *reg, wordsizes size, char *name, int getv, int movem)
224: {
225: start_brace ();
226: switch (mode) {
227: case Dreg:
228: if (movem)
229: abort ();
230: if (getv == 1)
231: switch (size) {
232: case sz_byte:
233: #if defined(AMIGA) && !defined(WARPUP)
234: /* sam: I don't know why gcc.2.7.2.1 produces a code worse */
235: /* if it is not done like that: */
236: printf ("\tuae_s8 %s = ((uae_u8*)&m68k_dreg(regs, %s))[3];\n", name, reg);
237: #else
238: printf ("\tuae_s8 %s = m68k_dreg(regs, %s);\n", name, reg);
239: #endif
240: break;
241: case sz_word:
242: #if defined(AMIGA) && !defined(WARPUP)
243: printf ("\tuae_s16 %s = ((uae_s16*)&m68k_dreg(regs, %s))[1];\n", name, reg);
244: #else
245: printf ("\tuae_s16 %s = m68k_dreg(regs, %s);\n", name, reg);
246: #endif
247: break;
248: case sz_long:
249: printf ("\tuae_s32 %s = m68k_dreg(regs, %s);\n", name, reg);
250: break;
251: default:
252: abort ();
253: }
254: return;
255: case Areg:
256: if (movem)
257: abort ();
258: if (getv == 1)
259: switch (size) {
260: case sz_word:
261: printf ("\tuae_s16 %s = m68k_areg(regs, %s);\n", name, reg);
262: break;
263: case sz_long:
264: printf ("\tuae_s32 %s = m68k_areg(regs, %s);\n", name, reg);
265: break;
266: default:
267: abort ();
268: }
269: return;
270: case Aind:
271: printf ("\tuaecptr %sa = m68k_areg(regs, %s);\n", name, reg);
272: break;
273: case Aipi:
274: printf ("\tuaecptr %sa = m68k_areg(regs, %s);\n", name, reg);
275: break;
276: case Apdi:
277: insn_n_cycles += 2;
278: switch (size) {
279: case sz_byte:
280: if (movem)
281: printf ("\tuaecptr %sa = m68k_areg(regs, %s);\n", name, reg);
282: else
283: printf ("\tuaecptr %sa = m68k_areg(regs, %s) - areg_byteinc[%s];\n", name, reg, reg);
284: break;
285: case sz_word:
286: printf ("\tuaecptr %sa = m68k_areg(regs, %s) - %d;\n", name, reg, movem ? 0 : 2);
287: break;
288: case sz_long:
289: printf ("\tuaecptr %sa = m68k_areg(regs, %s) - %d;\n", name, reg, movem ? 0 : 4);
290: break;
291: default:
292: abort ();
293: }
294: break;
295: case Ad16:
296: printf ("\tuaecptr %sa = m68k_areg(regs, %s) + (uae_s32)(uae_s16)%s;\n", name, reg, gen_nextiword ());
297: break;
298: case Ad8r:
299: insn_n_cycles += 2;
300: if (cpu_level > 1) {
301: if (next_cpu_level < 1)
302: next_cpu_level = 1;
303: sync_m68k_pc ();
304: start_brace ();
305: /* This would ordinarily be done in gen_nextiword, which we bypass. */
306: insn_n_cycles += 4;
307: printf ("\tuaecptr %sa = get_disp_ea_020(m68k_areg(regs, %s), next_iword());\n", name, reg);
308: } else
309: printf ("\tuaecptr %sa = get_disp_ea_000(m68k_areg(regs, %s), %s);\n", name, reg, gen_nextiword ());
310:
311: break;
312: case PC16:
313: printf ("\tuaecptr %sa = m68k_getpc () + %d;\n", name, m68k_pc_offset);
314: printf ("\t%sa += (uae_s32)(uae_s16)%s;\n", name, gen_nextiword ());
315: break;
316: case PC8r:
317: insn_n_cycles += 2;
318: if (cpu_level > 1) {
319: if (next_cpu_level < 1)
320: next_cpu_level = 1;
321: sync_m68k_pc ();
322: start_brace ();
323: /* This would ordinarily be done in gen_nextiword, which we bypass. */
324: insn_n_cycles += 4;
325: printf ("\tuaecptr tmppc = m68k_getpc();\n");
326: printf ("\tuaecptr %sa = get_disp_ea_020(tmppc, next_iword());\n", name);
327: } else {
328: printf ("\tuaecptr tmppc = m68k_getpc() + %d;\n", m68k_pc_offset);
329: printf ("\tuaecptr %sa = get_disp_ea_000(tmppc, %s);\n", name, gen_nextiword ());
330: }
331:
332: break;
333: case absw:
334: printf ("\tuaecptr %sa = (uae_s32)(uae_s16)%s;\n", name, gen_nextiword ());
335: break;
336: case absl:
337: printf ("\tuaecptr %sa = %s;\n", name, gen_nextilong ());
338: break;
339: case imm:
340: if (getv != 1)
341: abort ();
342: switch (size) {
343: case sz_byte:
344: printf ("\tuae_s8 %s = %s;\n", name, gen_nextibyte ());
345: break;
346: case sz_word:
347: printf ("\tuae_s16 %s = %s;\n", name, gen_nextiword ());
348: break;
349: case sz_long:
350: printf ("\tuae_s32 %s = %s;\n", name, gen_nextilong ());
351: break;
352: default:
353: abort ();
354: }
355: return;
356: case imm0:
357: if (getv != 1)
358: abort ();
359: printf ("\tuae_s8 %s = %s;\n", name, gen_nextibyte ());
360: return;
361: case imm1:
362: if (getv != 1)
363: abort ();
364: printf ("\tuae_s16 %s = %s;\n", name, gen_nextiword ());
365: return;
366: case imm2:
367: if (getv != 1)
368: abort ();
369: printf ("\tuae_s32 %s = %s;\n", name, gen_nextilong ());
370: return;
371: case immi:
372: if (getv != 1)
373: abort ();
374: printf ("\tuae_u32 %s = %s;\n", name, reg);
375: return;
376: default:
377: abort ();
378: }
379:
380: /* We get here for all non-reg non-immediate addressing modes to
381: * actually fetch the value. */
382:
383: if (using_exception_3 && getv != 0 && size != sz_byte) {
384: printf ("\tif ((%sa & 1) != 0) {\n", name);
385: printf ("\t\tlast_fault_for_exception_3 = %sa;\n", name);
386: printf ("\t\tlast_op_for_exception_3 = opcode;\n");
387: printf ("\t\tlast_addr_for_exception_3 = m68k_getpc() + %d;\n", m68k_pc_offset);
388: printf ("\t\tException(3, 0);\n");
389: printf ("\t\tgoto %s;\n", endlabelstr);
390: printf ("\t}\n");
391: need_endlabel = 1;
392: start_brace ();
393: }
394:
395: if (getv == 1) {
396: switch (size) {
397: case sz_byte: insn_n_cycles += 4; break;
398: case sz_word: insn_n_cycles += 4; break;
399: case sz_long: insn_n_cycles += 8; break;
400: default: abort ();
401: }
402: start_brace ();
403: switch (size) {
404: case sz_byte: printf ("\tuae_s8 %s = get_byte(%sa);\n", name, name); break;
405: case sz_word: printf ("\tuae_s16 %s = get_word(%sa);\n", name, name); break;
406: case sz_long: printf ("\tuae_s32 %s = get_long(%sa);\n", name, name); break;
407: default: abort ();
408: }
409: }
410:
411: /* We now might have to fix up the register for pre-dec or post-inc
412: * addressing modes. */
413: if (!movem)
414: switch (mode) {
415: case Aipi:
416: switch (size) {
417: case sz_byte:
418: printf ("\tm68k_areg(regs, %s) += areg_byteinc[%s];\n", reg, reg);
419: break;
420: case sz_word:
421: printf ("\tm68k_areg(regs, %s) += 2;\n", reg);
422: break;
423: case sz_long:
424: printf ("\tm68k_areg(regs, %s) += 4;\n", reg);
425: break;
426: default:
427: abort ();
428: }
429: break;
430: case Apdi:
431: printf ("\tm68k_areg (regs, %s) = %sa;\n", reg, name);
432: break;
433: default:
434: break;
435: }
436: }
437:
438: static void genastore (char *from, amodes mode, char *reg, wordsizes size, char *to)
439: {
440: switch (mode) {
441: case Dreg:
442: switch (size) {
443: case sz_byte:
444: printf ("\tm68k_dreg(regs, %s) = (m68k_dreg(regs, %s) & ~0xff) | ((%s) & 0xff);\n", reg, reg, from);
445: break;
446: case sz_word:
447: printf ("\tm68k_dreg(regs, %s) = (m68k_dreg(regs, %s) & ~0xffff) | ((%s) & 0xffff);\n", reg, reg, from);
448: break;
449: case sz_long:
450: printf ("\tm68k_dreg(regs, %s) = (%s);\n", reg, from);
451: break;
452: default:
453: abort ();
454: }
455: break;
456: case Areg:
457: switch (size) {
458: case sz_word:
459: fprintf (stderr, "Foo\n");
460: printf ("\tm68k_areg(regs, %s) = (uae_s32)(uae_s16)(%s);\n", reg, from);
461: break;
462: case sz_long:
463: printf ("\tm68k_areg(regs, %s) = (%s);\n", reg, from);
464: break;
465: default:
466: abort ();
467: }
468: break;
469: case Aind:
470: case Aipi:
471: case Apdi:
472: case Ad16:
473: case Ad8r:
474: case absw:
475: case absl:
476: case PC16:
477: case PC8r:
478: if (using_prefetch)
479: sync_m68k_pc ();
480: switch (size) {
481: case sz_byte:
482: insn_n_cycles += 4;
483: printf ("\tput_byte(%sa,%s);\n", to, from);
484: break;
485: case sz_word:
486: insn_n_cycles += 4;
487: if (cpu_level < 2 && (mode == PC16 || mode == PC8r))
488: abort ();
489: printf ("\tput_word(%sa,%s);\n", to, from);
490: break;
491: case sz_long:
492: insn_n_cycles += 8;
493: if (cpu_level < 2 && (mode == PC16 || mode == PC8r))
494: abort ();
495: printf ("\tput_long(%sa,%s);\n", to, from);
496: break;
497: default:
498: abort ();
499: }
500: break;
501: case imm:
502: case imm0:
503: case imm1:
504: case imm2:
505: case immi:
506: abort ();
507: break;
508: default:
509: abort ();
510: }
511: }
512:
513: static void genmovemel (uae_u16 opcode)
514: {
515: char getcode[100];
516: int size = table68k[opcode].size == sz_long ? 4 : 2;
517:
518: if (table68k[opcode].size == sz_long) {
519: strcpy (getcode, "get_long(srca)");
520: } else {
521: strcpy (getcode, "(uae_s32)(uae_s16)get_word(srca)");
522: }
523:
524: printf ("\tuae_u16 mask = %s;\n", gen_nextiword ());
525: printf ("\tunsigned int dmask = mask & 0xff, amask = (mask >> 8) & 0xff;\n");
526: genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 2, 1);
527: start_brace ();
528: printf ("\twhile (dmask) { m68k_dreg(regs, movem_index1[dmask]) = %s; srca += %d; dmask = movem_next[dmask]; }\n",
529: getcode, size);
530: printf ("\twhile (amask) { m68k_areg(regs, movem_index1[amask]) = %s; srca += %d; amask = movem_next[amask]; }\n",
531: getcode, size);
532:
533: if (table68k[opcode].dmode == Aipi)
534: printf ("\tm68k_areg(regs, dstreg) = srca;\n");
535: }
536:
537: static void genmovemle (uae_u16 opcode)
538: {
539: char putcode[100];
540: int size = table68k[opcode].size == sz_long ? 4 : 2;
541: if (table68k[opcode].size == sz_long) {
542: strcpy (putcode, "put_long(srca,");
543: } else {
544: strcpy (putcode, "put_word(srca,");
545: }
546:
547: printf ("\tuae_u16 mask = %s;\n", gen_nextiword ());
548: genamode (table68k[opcode].dmode, "dstreg", table68k[opcode].size, "src", 2, 1);
549: if (using_prefetch)
550: sync_m68k_pc ();
551:
552: start_brace ();
553: if (table68k[opcode].dmode == Apdi) {
554: printf ("\tuae_u16 amask = mask & 0xff, dmask = (mask >> 8) & 0xff;\n");
555: printf ("\twhile (amask) { srca -= %d; %s m68k_areg(regs, movem_index2[amask])); amask = movem_next[amask]; }\n",
556: size, putcode);
557: printf ("\twhile (dmask) { srca -= %d; %s m68k_dreg(regs, movem_index2[dmask])); dmask = movem_next[dmask]; }\n",
558: size, putcode);
559: printf ("\tm68k_areg(regs, dstreg) = srca;\n");
560: } else {
561: printf ("\tuae_u16 dmask = mask & 0xff, amask = (mask >> 8) & 0xff;\n");
562: printf ("\twhile (dmask) { %s m68k_dreg(regs, movem_index1[dmask])); srca += %d; dmask = movem_next[dmask]; }\n",
563: putcode, size);
564: printf ("\twhile (amask) { %s m68k_areg(regs, movem_index1[amask])); srca += %d; amask = movem_next[amask]; }\n",
565: putcode, size);
566: }
567: }
568:
569: static void duplicate_carry (void)
570: {
571: printf ("\tCOPY_CARRY;\n");
572: }
573:
574: typedef enum
575: {
576: flag_logical_noclobber, flag_logical, flag_add, flag_sub, flag_cmp, flag_addx, flag_subx, flag_zn,
577: flag_av, flag_sv
578: }
579: flagtypes;
580:
581: static void genflags_normal (flagtypes type, wordsizes size, char *value, char *src, char *dst)
582: {
583: char vstr[100], sstr[100], dstr[100];
584: char usstr[100], udstr[100];
585: char unsstr[100], undstr[100];
586:
587: switch (size) {
588: case sz_byte:
589: strcpy (vstr, "((uae_s8)(");
590: strcpy (usstr, "((uae_u8)(");
591: break;
592: case sz_word:
593: strcpy (vstr, "((uae_s16)(");
594: strcpy (usstr, "((uae_u16)(");
595: break;
596: case sz_long:
597: strcpy (vstr, "((uae_s32)(");
598: strcpy (usstr, "((uae_u32)(");
599: break;
600: default:
601: abort ();
602: }
603: strcpy (unsstr, usstr);
604:
605: strcpy (sstr, vstr);
606: strcpy (dstr, vstr);
607: strcat (vstr, value);
608: strcat (vstr, "))");
609: strcat (dstr, dst);
610: strcat (dstr, "))");
611: strcat (sstr, src);
612: strcat (sstr, "))");
613:
614: strcpy (udstr, usstr);
615: strcat (udstr, dst);
616: strcat (udstr, "))");
617: strcat (usstr, src);
618: strcat (usstr, "))");
619:
620: strcpy (undstr, unsstr);
621: strcat (unsstr, "-");
622: strcat (undstr, "~");
623: strcat (undstr, dst);
624: strcat (undstr, "))");
625: strcat (unsstr, src);
626: strcat (unsstr, "))");
627:
628: switch (type) {
629: case flag_logical_noclobber:
630: case flag_logical:
631: case flag_zn:
632: case flag_av:
633: case flag_sv:
634: case flag_addx:
635: case flag_subx:
636: break;
637:
638: case flag_add:
639: start_brace ();
640: printf ("uae_u32 %s = %s + %s;\n", value, dstr, sstr);
641: break;
642: case flag_sub:
643: case flag_cmp:
644: start_brace ();
645: printf ("uae_u32 %s = %s - %s;\n", value, dstr, sstr);
646: break;
647: }
648:
649: switch (type) {
650: case flag_logical_noclobber:
651: case flag_logical:
652: case flag_zn:
653: break;
654:
655: case flag_add:
656: case flag_sub:
657: case flag_addx:
658: case flag_subx:
659: case flag_cmp:
660: case flag_av:
661: case flag_sv:
662: start_brace ();
663: printf ("\t" BOOL_TYPE " flgs = %s < 0;\n", sstr);
664: printf ("\t" BOOL_TYPE " flgo = %s < 0;\n", dstr);
665: printf ("\t" BOOL_TYPE " flgn = %s < 0;\n", vstr);
666: break;
667: }
668:
669: switch (type) {
670: case flag_logical:
671: printf ("\tCLEAR_CZNV;\n");
672: printf ("\tSET_ZFLG (%s == 0);\n", vstr);
673: printf ("\tSET_NFLG (%s < 0);\n", vstr);
674: break;
675: case flag_logical_noclobber:
676: printf ("\tSET_ZFLG (%s == 0);\n", vstr);
677: printf ("\tSET_NFLG (%s < 0);\n", vstr);
678: break;
679: case flag_av:
680: printf ("\tSET_VFLG ((flgs ^ flgn) & (flgo ^ flgn));\n");
681: break;
682: case flag_sv:
683: printf ("\tSET_VFLG ((flgs ^ flgo) & (flgn ^ flgo));\n");
684: break;
685: case flag_zn:
686: printf ("\tSET_ZFLG (GET_ZFLG & (%s == 0));\n", vstr);
687: printf ("\tSET_NFLG (%s < 0);\n", vstr);
688: break;
689: case flag_add:
690: printf ("\tSET_ZFLG (%s == 0);\n", vstr);
691: printf ("\tSET_VFLG ((flgs ^ flgn) & (flgo ^ flgn));\n");
692: printf ("\tSET_CFLG (%s < %s);\n", undstr, usstr);
693: duplicate_carry ();
694: printf ("\tSET_NFLG (flgn != 0);\n");
695: break;
696: case flag_sub:
697: printf ("\tSET_ZFLG (%s == 0);\n", vstr);
698: printf ("\tSET_VFLG ((flgs ^ flgo) & (flgn ^ flgo));\n");
699: printf ("\tSET_CFLG (%s > %s);\n", usstr, udstr);
700: duplicate_carry ();
701: printf ("\tSET_NFLG (flgn != 0);\n");
702: break;
703: case flag_addx:
704: printf ("\tSET_VFLG ((flgs ^ flgn) & (flgo ^ flgn));\n"); /* minterm SON: 0x42 */
705: printf ("\tSET_CFLG (flgs ^ ((flgs ^ flgo) & (flgo ^ flgn)));\n"); /* minterm SON: 0xD4 */
706: duplicate_carry ();
707: break;
708: case flag_subx:
709: printf ("\tSET_VFLG ((flgs ^ flgo) & (flgo ^ flgn));\n"); /* minterm SON: 0x24 */
710: printf ("\tSET_CFLG (flgs ^ ((flgs ^ flgn) & (flgo ^ flgn)));\n"); /* minterm SON: 0xB2 */
711: duplicate_carry ();
712: break;
713: case flag_cmp:
714: printf ("\tSET_ZFLG (%s == 0);\n", vstr);
715: printf ("\tSET_VFLG ((flgs != flgo) && (flgn != flgo));\n");
716: printf ("\tSET_CFLG (%s > %s);\n", usstr, udstr);
717: printf ("\tSET_NFLG (flgn != 0);\n");
718: break;
719: }
720: }
721:
722: static void genflags (flagtypes type, wordsizes size, char *value, char *src, char *dst)
723: {
724: /* Temporarily deleted 68k/ARM flag optimizations. I'd prefer to have
725: them in the appropriate m68k.h files and use just one copy of this
726: code here. The API can be changed if necessary. */
727: #ifdef OPTIMIZED_FLAGS
728: switch (type) {
729: case flag_add:
730: case flag_sub:
731: start_brace ();
732: printf ("\tuae_u32 %s;\n", value);
733: break;
734:
735: default:
736: break;
737: }
738:
739: /* At least some of those casts are fairly important! */
740: switch (type) {
741: case flag_logical_noclobber:
742: printf ("\t{uae_u32 oldcznv = GET_CZNV & ~(FLAGVAL_Z | FLAGVAL_N);\n");
743: if (strcmp (value, "0") == 0) {
744: printf ("\tSET_CZNV (olcznv | FLAGVAL_Z);\n");
745: } else {
746: switch (size) {
747: case sz_byte: printf ("\toptflag_testb ((uae_s8)(%s));\n", value); break;
748: case sz_word: printf ("\toptflag_testw ((uae_s16)(%s));\n", value); break;
749: case sz_long: printf ("\toptflag_testl ((uae_s32)(%s));\n", value); break;
750: }
751: printf ("\tIOR_CZNV (oldcznv);\n");
752: }
753: printf ("\t}\n");
754: return;
755: case flag_logical:
756: if (strcmp (value, "0") == 0) {
757: printf ("\tSET_CZNV (FLAGVAL_Z);\n");
758: } else {
759: switch (size) {
760: case sz_byte: printf ("\toptflag_testb ((uae_s8)(%s));\n", value); break;
761: case sz_word: printf ("\toptflag_testw ((uae_s16)(%s));\n", value); break;
762: case sz_long: printf ("\toptflag_testl ((uae_s32)(%s));\n", value); break;
763: }
764: }
765: return;
766:
767: case flag_add:
768: switch (size) {
769: case sz_byte: printf ("\toptflag_addb (%s, (uae_s8)(%s), (uae_s8)(%s));\n", value, src, dst); break;
770: case sz_word: printf ("\toptflag_addw (%s, (uae_s16)(%s), (uae_s16)(%s));\n", value, src, dst); break;
771: case sz_long: printf ("\toptflag_addl (%s, (uae_s32)(%s), (uae_s32)(%s));\n", value, src, dst); break;
772: }
773: return;
774:
775: case flag_sub:
776: switch (size) {
777: case sz_byte: printf ("\toptflag_subb (%s, (uae_s8)(%s), (uae_s8)(%s));\n", value, src, dst); break;
778: case sz_word: printf ("\toptflag_subw (%s, (uae_s16)(%s), (uae_s16)(%s));\n", value, src, dst); break;
779: case sz_long: printf ("\toptflag_subl (%s, (uae_s32)(%s), (uae_s32)(%s));\n", value, src, dst); break;
780: }
781: return;
782:
783: case flag_cmp:
784: switch (size) {
785: case sz_byte: printf ("\toptflag_cmpb ((uae_s8)(%s), (uae_s8)(%s));\n", src, dst); break;
786: case sz_word: printf ("\toptflag_cmpw ((uae_s16)(%s), (uae_s16)(%s));\n", src, dst); break;
787: case sz_long: printf ("\toptflag_cmpl ((uae_s32)(%s), (uae_s32)(%s));\n", src, dst); break;
788: }
789: return;
790:
791: default:
792: break;
793: }
794: #endif
795:
796: genflags_normal (type, size, value, src, dst);
797: }
798:
799: static void force_range_for_rox (const char *var, wordsizes size)
800: {
801: /* Could do a modulo operation here... which one is faster? */
802: switch (size) {
803: case sz_long:
804: printf ("\tif (%s >= 33) %s -= 33;\n", var, var);
805: break;
806: case sz_word:
807: printf ("\tif (%s >= 34) %s -= 34;\n", var, var);
808: printf ("\tif (%s >= 17) %s -= 17;\n", var, var);
809: break;
810: case sz_byte:
811: printf ("\tif (%s >= 36) %s -= 36;\n", var, var);
812: printf ("\tif (%s >= 18) %s -= 18;\n", var, var);
813: printf ("\tif (%s >= 9) %s -= 9;\n", var, var);
814: break;
815: }
816: }
817:
818: static const char *cmask (wordsizes size)
819: {
820: switch (size) {
821: case sz_byte: return "0x80";
822: case sz_word: return "0x8000";
823: case sz_long: return "0x80000000";
824: default: abort ();
825: }
826: }
827:
828: static int source_is_imm1_8 (struct instr *i)
829: {
830: return i->stype == 3;
831: }
832:
833: static void gen_opcode (unsigned long int opcode)
834: {
835: struct instr *curi = table68k + opcode;
836: insn_n_cycles = 4;
837:
838: start_brace ();
839: #if 0
840: printf ("uae_u8 *m68k_pc = regs.pc_p;\n");
841: #endif
842: m68k_pc_offset = 2;
843: switch (curi->plev) {
844: case 0: /* not privileged */
845: break;
846: case 1: /* unprivileged only on 68000 */
847: if (cpu_level == 0)
848: break;
849: if (next_cpu_level < 0)
850: next_cpu_level = 0;
851:
852: /* fall through */
853: case 2: /* priviledged */
854: printf ("if (!regs.s) { Exception(8,0); goto %s; }\n", endlabelstr);
855: need_endlabel = 1;
856: start_brace ();
857: break;
858: case 3: /* privileged if size == word */
859: if (curi->size == sz_byte)
860: break;
861: printf ("if (!regs.s) { Exception(8,0); goto %s; }\n", endlabelstr);
862: need_endlabel = 1;
863: start_brace ();
864: break;
865: }
866: switch (curi->mnemo) {
867: case i_OR:
868: case i_AND:
869: case i_EOR:
870: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
871: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
872: printf ("\tsrc %c= dst;\n", curi->mnemo == i_OR ? '|' : curi->mnemo == i_AND ? '&' : '^');
873: genflags (flag_logical, curi->size, "src", "", "");
874: genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
875: break;
876: case i_ORSR:
877: case i_EORSR:
878: printf ("\tMakeSR();\n");
879: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
880: if (curi->size == sz_byte) {
881: printf ("\tsrc &= 0xFF;\n");
882: }
883: printf ("\tregs.sr %c= src;\n", curi->mnemo == i_EORSR ? '^' : '|');
884: printf ("\tMakeFromSR();\n");
885: break;
886: case i_ANDSR:
887: printf ("\tMakeSR();\n");
888: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
889: if (curi->size == sz_byte) {
890: printf ("\tsrc |= 0xFF00;\n");
891: }
892: printf ("\tregs.sr &= src;\n");
893: printf ("\tMakeFromSR();\n");
894: break;
895: case i_SUB:
896: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
897: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
898: start_brace ();
899: genflags (flag_sub, curi->size, "newv", "src", "dst");
900: genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
901: break;
902: case i_SUBA:
903: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
904: genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
905: start_brace ();
906: printf ("\tuae_u32 newv = dst - src;\n");
907: genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
908: break;
909: case i_SUBX:
910: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
911: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
912: start_brace ();
913: printf ("\tuae_u32 newv = dst - src - (GET_XFLG ? 1 : 0);\n");
914: genflags (flag_subx, curi->size, "newv", "src", "dst");
915: genflags (flag_zn, curi->size, "newv", "", "");
916: genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
917: break;
918: case i_SBCD:
919: /* Let's hope this works... */
920: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
921: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
922: start_brace ();
923: printf ("\tuae_u16 newv_lo = (dst & 0xF) - (src & 0xF) - (GET_XFLG ? 1 : 0);\n");
924: printf ("\tuae_u16 newv_hi = (dst & 0xF0) - (src & 0xF0);\n");
925: printf ("\tuae_u16 newv;\n");
926: printf ("\tint cflg;\n");
927: printf ("\tif (newv_lo > 9) { newv_lo-=6; newv_hi-=0x10; }\n");
928: printf ("\tnewv = newv_hi + (newv_lo & 0xF);");
929: printf ("\tcflg = (newv_hi & 0x1F0) > 0x90;\n");
930: printf ("\tSET_CFLG (cflg);\n");
931: duplicate_carry ();
932: printf ("\tif (cflg) newv -= 0x60;\n");
933: genflags (flag_zn, curi->size, "newv", "", "");
934: genflags (flag_sv, curi->size, "newv", "src", "dst");
935: genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
936: break;
937: case i_ADD:
938: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
939: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
940: start_brace ();
941: genflags (flag_add, curi->size, "newv", "src", "dst");
942: genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
943: break;
944: case i_ADDA:
945: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
946: genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
947: start_brace ();
948: printf ("\tuae_u32 newv = dst + src;\n");
949: genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
950: break;
951: case i_ADDX:
952: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
953: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
954: start_brace ();
955: printf ("\tuae_u32 newv = dst + src + (GET_XFLG ? 1 : 0);\n");
956: genflags (flag_addx, curi->size, "newv", "src", "dst");
957: genflags (flag_zn, curi->size, "newv", "", "");
958: genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
959: break;
960: case i_ABCD:
961: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
962: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
963: start_brace ();
964: printf ("\tuae_u16 newv_lo = (src & 0xF) + (dst & 0xF) + (GET_XFLG ? 1 : 0);\n");
965: printf ("\tuae_u16 newv_hi = (src & 0xF0) + (dst & 0xF0);\n");
966: printf ("\tuae_u16 newv;\n");
967: printf ("\tint cflg;\n");
968: printf ("\tif (newv_lo > 9) { newv_lo +=6; }\n");
969: printf ("\tnewv = newv_hi + newv_lo;");
970: printf ("\tcflg = (newv & 0x1F0) > 0x90;\n");
971: printf ("\tSET_CFLG (cflg);\n");
972: duplicate_carry ();
973: printf ("\tif (cflg) newv += 0x60;\n");
974: genflags (flag_zn, curi->size, "newv", "", "");
975: genflags (flag_sv, curi->size, "newv", "src", "dst");
976: genastore ("newv", curi->dmode, "dstreg", curi->size, "dst");
977: break;
978: case i_NEG:
979: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
980: start_brace ();
981: genflags (flag_sub, curi->size, "dst", "src", "0");
982: genastore ("dst", curi->smode, "srcreg", curi->size, "src");
983: break;
984: case i_NEGX:
985: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
986: start_brace ();
987: printf ("\tuae_u32 newv = 0 - src - (GET_XFLG ? 1 : 0);\n");
988: genflags (flag_subx, curi->size, "newv", "src", "0");
989: genflags (flag_zn, curi->size, "newv", "", "");
990: genastore ("newv", curi->smode, "srcreg", curi->size, "src");
991: break;
992: case i_NBCD:
993: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
994: start_brace ();
995: printf ("\tuae_u16 newv_lo = - (src & 0xF) - (GET_XFLG ? 1 : 0);\n");
996: printf ("\tuae_u16 newv_hi = - (src & 0xF0);\n");
997: printf ("\tuae_u16 newv;\n");
998: printf ("\tint cflg;\n");
999: printf ("\tif (newv_lo > 9) { newv_lo-=6; newv_hi-=0x10; }\n");
1000: printf ("\tnewv = newv_hi + (newv_lo & 0xF);");
1001: printf ("\tcflg = cflg = (newv_hi & 0x1F0) > 0x90;\n");
1002: printf ("\tSET_CFLG (cflg);\n");
1003: duplicate_carry();
1004: printf ("\tif (cflg) newv -= 0x60;\n");
1005: genflags (flag_zn, curi->size, "newv", "", "");
1006: genastore ("newv", curi->smode, "srcreg", curi->size, "src");
1007: break;
1008: case i_CLR:
1009: genamode (curi->smode, "srcreg", curi->size, "src", 2, 0);
1010: genflags (flag_logical, curi->size, "0", "", "");
1011: genastore ("0", curi->smode, "srcreg", curi->size, "src");
1012: break;
1013: case i_NOT:
1014: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1015: start_brace ();
1016: printf ("\tuae_u32 dst = ~src;\n");
1017: genflags (flag_logical, curi->size, "dst", "", "");
1018: genastore ("dst", curi->smode, "srcreg", curi->size, "src");
1019: break;
1020: case i_TST:
1021: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1022: genflags (flag_logical, curi->size, "src", "", "");
1023: break;
1024: case i_BTST:
1025: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1026: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1027: if (curi->size == sz_byte)
1028: printf ("\tsrc &= 7;\n");
1029: else
1030: printf ("\tsrc &= 31;\n");
1031: printf ("\tSET_ZFLG (1 ^ ((dst >> src) & 1));\n");
1032: break;
1033: case i_BCHG:
1034: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1035: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1036: if (curi->size == sz_byte)
1037: printf ("\tsrc &= 7;\n");
1038: else
1039: printf ("\tsrc &= 31;\n");
1040: printf ("\tdst ^= (1 << src);\n");
1041: printf ("\tSET_ZFLG (((uae_u32)dst & (1 << src)) >> src);\n");
1042: genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
1043: break;
1044: case i_BCLR:
1045: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1046: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1047: if (curi->size == sz_byte)
1048: printf ("\tsrc &= 7;\n");
1049: else
1050: printf ("\tsrc &= 31;\n");
1051: printf ("\tSET_ZFLG (1 ^ ((dst >> src) & 1));\n");
1052: printf ("\tdst &= ~(1 << src);\n");
1053: genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
1054: break;
1055: case i_BSET:
1056: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1057: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1058: if (curi->size == sz_byte)
1059: printf ("\tsrc &= 7;\n");
1060: else
1061: printf ("\tsrc &= 31;\n");
1062: printf ("\tSET_ZFLG (1 ^ ((dst >> src) & 1));\n");
1063: printf ("\tdst |= (1 << src);\n");
1064: genastore ("dst", curi->dmode, "dstreg", curi->size, "dst");
1065: break;
1066: case i_CMPM:
1067: case i_CMP:
1068: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1069: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1070: start_brace ();
1071: genflags (flag_cmp, curi->size, "newv", "src", "dst");
1072: break;
1073: case i_CMPA:
1074: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1075: genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
1076: start_brace ();
1077: genflags (flag_cmp, sz_long, "newv", "src", "dst");
1078: break;
1079: /* The next two are coded a little unconventional, but they are doing
1080: * weird things... */
1081: case i_MVPRM:
1082: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1083:
1084: printf ("\tuaecptr memp = m68k_areg(regs, dstreg) + (uae_s32)(uae_s16)%s;\n", gen_nextiword ());
1085: if (curi->size == sz_word) {
1086: printf ("\tput_byte(memp, src >> 8); put_byte(memp + 2, src);\n");
1087: } else {
1088: printf ("\tput_byte(memp, src >> 24); put_byte(memp + 2, src >> 16);\n");
1089: printf ("\tput_byte(memp + 4, src >> 8); put_byte(memp + 6, src);\n");
1090: }
1091: break;
1092: case i_MVPMR:
1093: printf ("\tuaecptr memp = m68k_areg(regs, srcreg) + (uae_s32)(uae_s16)%s;\n", gen_nextiword ());
1094: genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
1095: if (curi->size == sz_word) {
1096: printf ("\tuae_u16 val = (get_byte(memp) << 8) + get_byte(memp + 2);\n");
1097: } else {
1098: printf ("\tuae_u32 val = (get_byte(memp) << 24) + (get_byte(memp + 2) << 16)\n");
1099: printf (" + (get_byte(memp + 4) << 8) + get_byte(memp + 6);\n");
1100: }
1101: genastore ("val", curi->dmode, "dstreg", curi->size, "dst");
1102: break;
1103: case i_MOVE:
1104: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1105: genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
1106: genflags (flag_logical, curi->size, "src", "", "");
1107: genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
1108: break;
1109: case i_MOVEA:
1110: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1111: genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
1112: if (curi->size == sz_word) {
1113: printf ("\tuae_u32 val = (uae_s32)(uae_s16)src;\n");
1114: } else {
1115: printf ("\tuae_u32 val = src;\n");
1116: }
1117: genastore ("val", curi->dmode, "dstreg", sz_long, "dst");
1118: break;
1119: case i_MVSR2:
1120: genamode (curi->smode, "srcreg", sz_word, "src", 2, 0);
1121: printf ("\tMakeSR();\n");
1122: if (curi->size == sz_byte)
1123: genastore ("regs.sr & 0xff", curi->smode, "srcreg", sz_word, "src");
1124: else
1125: genastore ("regs.sr", curi->smode, "srcreg", sz_word, "src");
1126: break;
1127: case i_MV2SR:
1128: genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
1129: if (curi->size == sz_byte)
1130: printf ("\tMakeSR();\n\tregs.sr &= 0xFF00;\n\tregs.sr |= src & 0xFF;\n");
1131: else {
1132: printf ("\tregs.sr = src;\n");
1133: }
1134: printf ("\tMakeFromSR();\n");
1135: break;
1136: case i_SWAP:
1137: genamode (curi->smode, "srcreg", sz_long, "src", 1, 0);
1138: start_brace ();
1139: printf ("\tuae_u32 dst = ((src >> 16)&0xFFFF) | ((src&0xFFFF)<<16);\n");
1140: genflags (flag_logical, sz_long, "dst", "", "");
1141: genastore ("dst", curi->smode, "srcreg", sz_long, "src");
1142: break;
1143: case i_EXG:
1144: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1145: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1146: genastore ("dst", curi->smode, "srcreg", curi->size, "src");
1147: genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
1148: break;
1149: case i_EXT:
1150: genamode (curi->smode, "srcreg", sz_long, "src", 1, 0);
1151: start_brace ();
1152: switch (curi->size) {
1153: case sz_byte: printf ("\tuae_u32 dst = (uae_s32)(uae_s8)src;\n"); break;
1154: case sz_word: printf ("\tuae_u16 dst = (uae_s16)(uae_s8)src;\n"); break;
1155: case sz_long: printf ("\tuae_u32 dst = (uae_s32)(uae_s16)src;\n"); break;
1156: default: abort ();
1157: }
1158: genflags (flag_logical,
1159: curi->size == sz_word ? sz_word : sz_long, "dst", "", "");
1160: genastore ("dst", curi->smode, "srcreg",
1161: curi->size == sz_word ? sz_word : sz_long, "src");
1162: break;
1163: case i_MVMEL:
1164: genmovemel (opcode);
1165: break;
1166: case i_MVMLE:
1167: genmovemle (opcode);
1168: break;
1169: case i_TRAP:
1170: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1171: sync_m68k_pc ();
1172: printf ("\tException(src+32,0);\n");
1173: m68k_pc_offset = 0;
1174: break;
1175: case i_MVR2USP:
1176: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1177: printf ("\tregs.usp = src;\n");
1178: break;
1179: case i_MVUSP2R:
1180: genamode (curi->smode, "srcreg", curi->size, "src", 2, 0);
1181: genastore ("regs.usp", curi->smode, "srcreg", curi->size, "src");
1182: break;
1183: case i_RESET:
1184: printf ("\tcustomreset();\n");
1185: break;
1186: case i_NOP:
1187: break;
1188: case i_STOP:
1189: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1190: printf ("\tregs.sr = src;\n");
1191: printf ("\tMakeFromSR();\n");
1192: printf ("\tm68k_setstopped(1);\n");
1193: break;
1194: case i_RTE:
1195: if (cpu_level == 0) {
1196: genamode (Aipi, "7", sz_word, "sr", 1, 0);
1197: genamode (Aipi, "7", sz_long, "pc", 1, 0);
1198: printf ("\tregs.sr = sr; m68k_setpc_rte(pc);\n");
1199: fill_prefetch_0 ();
1200: printf ("\tMakeFromSR();\n");
1201: } else {
1202: int old_brace_level = n_braces;
1203: if (next_cpu_level < 0)
1204: next_cpu_level = 0;
1205: printf ("\tuae_u16 newsr; uae_u32 newpc; for (;;) {\n");
1206: genamode (Aipi, "7", sz_word, "sr", 1, 0);
1207: genamode (Aipi, "7", sz_long, "pc", 1, 0);
1208: genamode (Aipi, "7", sz_word, "format", 1, 0);
1209: printf ("\tnewsr = sr; newpc = pc;\n");
1210: printf ("\tif ((format & 0xF000) == 0x0000) { break; }\n");
1211: printf ("\telse if ((format & 0xF000) == 0x1000) { ; }\n");
1212: printf ("\telse if ((format & 0xF000) == 0x2000) { m68k_areg(regs, 7) += 4; break; }\n");
1213: printf ("\telse if ((format & 0xF000) == 0x8000) { m68k_areg(regs, 7) += 50; break; }\n");
1214: printf ("\telse if ((format & 0xF000) == 0x9000) { m68k_areg(regs, 7) += 12; break; }\n");
1215: printf ("\telse if ((format & 0xF000) == 0xa000) { m68k_areg(regs, 7) += 24; break; }\n");
1216: printf ("\telse if ((format & 0xF000) == 0xb000) { m68k_areg(regs, 7) += 84; break; }\n");
1217: printf ("\telse { Exception(14,0); goto %s; }\n", endlabelstr);
1218: printf ("\tregs.sr = newsr; MakeFromSR();\n}\n");
1219: pop_braces (old_brace_level);
1220: printf ("\tregs.sr = newsr; MakeFromSR();\n");
1221: printf ("\tm68k_setpc_rte(newpc);\n");
1222: fill_prefetch_0 ();
1223: need_endlabel = 1;
1224: }
1225: /* PC is set and prefetch filled. */
1226: m68k_pc_offset = 0;
1227: break;
1228: case i_RTD:
1229: printf ("\tcompiler_flush_jsr_stack();\n");
1230: genamode (Aipi, "7", sz_long, "pc", 1, 0);
1231: genamode (curi->smode, "srcreg", curi->size, "offs", 1, 0);
1232: printf ("\tm68k_areg(regs, 7) += offs;\n");
1233: printf ("\tm68k_setpc_rte(pc);\n");
1234: fill_prefetch_0 ();
1235: /* PC is set and prefetch filled. */
1236: m68k_pc_offset = 0;
1237: break;
1238: case i_LINK:
1239: genamode (Apdi, "7", sz_long, "old", 2, 0);
1240: genamode (curi->smode, "srcreg", sz_long, "src", 1, 0);
1241: genastore ("src", Apdi, "7", sz_long, "old");
1242: genastore ("m68k_areg(regs, 7)", curi->smode, "srcreg", sz_long, "src");
1243: genamode (curi->dmode, "dstreg", curi->size, "offs", 1, 0);
1244: printf ("\tm68k_areg(regs, 7) += offs;\n");
1245: break;
1246: case i_UNLK:
1247: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1248: printf ("\tm68k_areg(regs, 7) = src;\n");
1249: genamode (Aipi, "7", sz_long, "old", 1, 0);
1250: genastore ("old", curi->smode, "srcreg", curi->size, "src");
1251: break;
1252: case i_RTS:
1253: printf ("\tm68k_do_rts();\n");
1254: fill_prefetch_0 ();
1255: m68k_pc_offset = 0;
1256: break;
1257: case i_TRAPV:
1258: sync_m68k_pc ();
1259: printf ("\tif (GET_VFLG) { Exception(7,m68k_getpc()); goto %s; }\n", endlabelstr);
1260: need_endlabel = 1;
1261: break;
1262: case i_RTR:
1263: printf ("\tcompiler_flush_jsr_stack();\n");
1264: printf ("\tMakeSR();\n");
1265: genamode (Aipi, "7", sz_word, "sr", 1, 0);
1266: genamode (Aipi, "7", sz_long, "pc", 1, 0);
1267: printf ("\tregs.sr &= 0xFF00; sr &= 0xFF;\n");
1268: printf ("\tregs.sr |= sr; m68k_setpc(pc);\n");
1269: fill_prefetch_0 ();
1270: printf ("\tMakeFromSR();\n");
1271: m68k_pc_offset = 0;
1272: break;
1273: case i_JSR:
1274: genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
1275: printf ("\tm68k_do_jsr(m68k_getpc() + %d, srca);\n", m68k_pc_offset);
1276: fill_prefetch_0 ();
1277: m68k_pc_offset = 0;
1278: break;
1279: case i_JMP:
1280: genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
1281: printf ("\tm68k_setpc(srca);\n");
1282: fill_prefetch_0 ();
1283: m68k_pc_offset = 0;
1284: break;
1285: case i_BSR:
1286: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1287: printf ("\tuae_s32 s = (uae_s32)src + 2;\n");
1288: if (using_exception_3) {
1289: printf ("\tif (src & 1) {\n");
1290: printf ("\tlast_addr_for_exception_3 = m68k_getpc() + 2;\n");
1291: printf ("\t\tlast_fault_for_exception_3 = m68k_getpc() + s;\n");
1292: printf ("\t\tlast_op_for_exception_3 = opcode; Exception(3,0); goto %s;\n", endlabelstr);
1293: printf ("\t}\n");
1294: need_endlabel = 1;
1295: }
1296: printf ("\tm68k_do_bsr(m68k_getpc() + %d, s);\n", m68k_pc_offset);
1297: fill_prefetch_0 ();
1298: m68k_pc_offset = 0;
1299: break;
1300: case i_Bcc:
1301: if (curi->size == sz_long) {
1302: if (cpu_level < 2) {
1303: printf ("\tm68k_incpc(2);\n");
1304: printf ("\tif (!cctrue(%d)) goto %s;\n", curi->cc, endlabelstr);
1305: printf ("\t\tlast_addr_for_exception_3 = m68k_getpc() + 2;\n");
1306: printf ("\t\tlast_fault_for_exception_3 = m68k_getpc() + 1;\n");
1307: printf ("\t\tlast_op_for_exception_3 = opcode; Exception(3,0); goto %s;\n", endlabelstr);
1308: need_endlabel = 1;
1309: } else {
1310: if (next_cpu_level < 1)
1311: next_cpu_level = 1;
1312: }
1313: }
1314: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1315: printf ("\tif (!cctrue(%d)) goto didnt_jump;\n", curi->cc);
1316: if (using_exception_3) {
1317: printf ("\tif (src & 1) {\n");
1318: printf ("\t\tlast_addr_for_exception_3 = m68k_getpc() + 2;\n");
1319: printf ("\t\tlast_fault_for_exception_3 = m68k_getpc() + 2 + (uae_s32)src;\n");
1320: printf ("\t\tlast_op_for_exception_3 = opcode; Exception(3,0); goto %s;\n", endlabelstr);
1321: printf ("\t}\n");
1322: need_endlabel = 1;
1323: }
1324: #ifdef USE_COMPILER
1325: printf ("\tm68k_setpc_bcc(m68k_getpc() + 2 + (uae_s32)src);\n");
1326: #else
1327: printf ("\tm68k_incpc ((uae_s32)src + 2);\n");
1328: #endif
1329: fill_prefetch_0 ();
1330: printf ("\treturn 5;\n");
1331: printf ("didnt_jump:;\n");
1332: need_endlabel = 1;
1333: insn_n_cycles = curi->size == sz_byte ? 8 : 12;
1334: break;
1335: case i_LEA:
1336: genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
1337: genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
1338: genastore ("srca", curi->dmode, "dstreg", curi->size, "dst");
1339: break;
1340: case i_PEA:
1341: genamode (curi->smode, "srcreg", curi->size, "src", 0, 0);
1342: genamode (Apdi, "7", sz_long, "dst", 2, 0);
1343: genastore ("srca", Apdi, "7", sz_long, "dst");
1344: break;
1345: case i_DBcc:
1346: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1347: genamode (curi->dmode, "dstreg", curi->size, "offs", 1, 0);
1348:
1349: printf ("\tif (!cctrue(%d)) {\n", curi->cc);
1350: genastore ("(src-1)", curi->smode, "srcreg", curi->size, "src");
1351:
1352: printf ("\t\tif (src) {\n");
1353: if (using_exception_3) {
1354: printf ("\t\t\tif (offs & 1) {\n");
1355: printf ("\t\t\tlast_addr_for_exception_3 = m68k_getpc() + 2;\n");
1356: printf ("\t\t\tlast_fault_for_exception_3 = m68k_getpc() + 2 + (uae_s32)offs + 2;\n");
1357: printf ("\t\t\tlast_op_for_exception_3 = opcode; Exception(3,0); goto %s;\n", endlabelstr);
1358: printf ("\t\t}\n");
1359: need_endlabel = 1;
1360: }
1361: #ifdef USE_COMPILER
1362: printf ("\t\t\tm68k_setpc_bcc(m68k_getpc() + (uae_s32)offs + 2);\n");
1363: #else
1364: printf ("\t\t\tm68k_incpc((uae_s32)offs + 2);\n");
1365: #endif
1366: fill_prefetch_0 ();
1367: /* ??? Cycle count is a guess. */
1368: printf ("\t\treturn 6;\n");
1369: printf ("\t\t}\n");
1370: printf ("\t}\n");
1371: insn_n_cycles = 12;
1372: need_endlabel = 1;
1373: break;
1374: case i_Scc:
1375: genamode (curi->smode, "srcreg", curi->size, "src", 2, 0);
1376: start_brace ();
1377: printf ("\tint val = cctrue(%d) ? 0xff : 0;\n", curi->cc);
1378: genastore ("val", curi->smode, "srcreg", curi->size, "src");
1379: break;
1380: case i_DIVU:
1381: printf ("\tuaecptr oldpc = m68k_getpc();\n");
1382: genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
1383: genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
1384: sync_m68k_pc ();
1385: /* Clear V flag when dividing by zero - Alcatraz Odyssey demo depends
1386: * on this (actually, it's doing a DIVS). */
1387: printf ("\tif (src == 0) { SET_VFLG (0); Exception (5, oldpc); goto %s; } else {\n", endlabelstr);
1388: printf ("\tuae_u32 newv = (uae_u32)dst / (uae_u32)(uae_u16)src;\n");
1389: printf ("\tuae_u32 rem = (uae_u32)dst %% (uae_u32)(uae_u16)src;\n");
1390: /* The N flag appears to be set each time there is an overflow.
1391: * Weird. */
1392: printf ("\tif (newv > 0xffff) { SET_VFLG (1); SET_NFLG (1); SET_CFLG (0); } else\n\t{\n");
1393: genflags (flag_logical, sz_word, "newv", "", "");
1394: printf ("\tnewv = (newv & 0xffff) | ((uae_u32)rem << 16);\n");
1395: genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
1396: printf ("\t}\n");
1397: printf ("\t}\n");
1398: insn_n_cycles += 136;
1399: need_endlabel = 1;
1400: break;
1401: case i_DIVS:
1402: printf ("\tuaecptr oldpc = m68k_getpc();\n");
1403: genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
1404: genamode (curi->dmode, "dstreg", sz_long, "dst", 1, 0);
1405: sync_m68k_pc ();
1406: printf ("\tif (src == 0) { SET_VFLG (0); Exception(5,oldpc); goto %s; } else {\n", endlabelstr);
1407: printf ("\tuae_s32 newv = (uae_s32)dst / (uae_s32)(uae_s16)src;\n");
1408: printf ("\tuae_u16 rem = (uae_s32)dst %% (uae_s32)(uae_s16)src;\n");
1409: printf ("\tif ((newv & 0xffff8000) != 0 && (newv & 0xffff8000) != 0xffff8000) { SET_VFLG (1); SET_NFLG (1); SET_CFLG (0); } else\n\t{\n");
1410: printf ("\tif (((uae_s16)rem < 0) != ((uae_s32)dst < 0)) rem = -rem;\n");
1411: genflags (flag_logical, sz_word, "newv", "", "");
1412: printf ("\tnewv = (newv & 0xffff) | ((uae_u32)rem << 16);\n");
1413: genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
1414: printf ("\t}\n");
1415: printf ("\t}\n");
1416: insn_n_cycles += 154;
1417: need_endlabel = 1;
1418: break;
1419: case i_MULU:
1420: genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
1421: genamode (curi->dmode, "dstreg", sz_word, "dst", 1, 0);
1422: start_brace ();
1423: printf ("\tuae_u32 newv = (uae_u32)(uae_u16)dst * (uae_u32)(uae_u16)src;\n");
1424: genflags (flag_logical, sz_long, "newv", "", "");
1425: genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
1426: insn_n_cycles += 66;
1427: break;
1428: case i_MULS:
1429: genamode (curi->smode, "srcreg", sz_word, "src", 1, 0);
1430: genamode (curi->dmode, "dstreg", sz_word, "dst", 1, 0);
1431: start_brace ();
1432: printf ("\tuae_u32 newv = (uae_s32)(uae_s16)dst * (uae_s32)(uae_s16)src;\n");
1433: genflags (flag_logical, sz_long, "newv", "", "");
1434: genastore ("newv", curi->dmode, "dstreg", sz_long, "dst");
1435: insn_n_cycles += 66;
1436: break;
1437: case i_CHK:
1438: printf ("\tuaecptr oldpc = m68k_getpc();\n");
1439: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1440: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1441: printf ("\tif ((uae_s32)dst < 0) { SET_NFLG (1); Exception(6,oldpc); goto %s; }\n", endlabelstr);
1442: printf ("\telse if (dst > src) { SET_NFLG (0); Exception(6,oldpc); goto %s; }\n", endlabelstr);
1443: need_endlabel = 1;
1444: break;
1445:
1446: case i_CHK2:
1447: printf ("\tuaecptr oldpc = m68k_getpc();\n");
1448: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
1449: genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
1450: printf ("\t{uae_s32 upper,lower,reg = regs.regs[(extra >> 12) & 15];\n");
1451: switch (curi->size) {
1452: case sz_byte:
1453: printf ("\tlower=(uae_s32)(uae_s8)get_byte(dsta); upper = (uae_s32)(uae_s8)get_byte(dsta+1);\n");
1454: printf ("\tif ((extra & 0x8000) == 0) reg = (uae_s32)(uae_s8)reg;\n");
1455: break;
1456: case sz_word:
1457: printf ("\tlower=(uae_s32)(uae_s16)get_word(dsta); upper = (uae_s32)(uae_s16)get_word(dsta+2);\n");
1458: printf ("\tif ((extra & 0x8000) == 0) reg = (uae_s32)(uae_s16)reg;\n");
1459: break;
1460: case sz_long:
1461: printf ("\tlower=get_long(dsta); upper = get_long(dsta+4);\n");
1462: break;
1463: default:
1464: abort ();
1465: }
1466: printf ("\tSET_ZFLG (upper == reg || lower == reg);\n");
1467: printf ("\tSET_CFLG (lower <= upper ? reg < lower || reg > upper : reg > upper || reg < lower);\n");
1468: printf ("\tif ((extra & 0x800) && GET_CFLG) { Exception(6,oldpc); goto %s; }\n}\n", endlabelstr);
1469: need_endlabel = 1;
1470: break;
1471:
1472: case i_ASR:
1473: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1474: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1475: start_brace ();
1476: switch (curi->size) {
1477: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1478: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1479: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1480: default: abort ();
1481: }
1482: printf ("\tuae_u32 sign = (%s & val) >> %d;\n", cmask (curi->size), bit_size (curi->size) - 1);
1483: printf ("\tcnt &= 63;\n");
1484: printf ("\tCLEAR_CZNV;\n");
1485: printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
1486: printf ("\t\tval = %s & (uae_u32)-sign;\n", bit_mask (curi->size));
1487: printf ("\t\tSET_CFLG (sign);\n");
1488: duplicate_carry ();
1489: if (source_is_imm1_8 (curi))
1490: printf ("\t} else {\n");
1491: else
1492: printf ("\t} else if (cnt > 0) {\n");
1493: printf ("\t\tval >>= cnt - 1;\n");
1494: printf ("\t\tSET_CFLG (val & 1);\n");
1495: duplicate_carry ();
1496: printf ("\t\tval >>= 1;\n");
1497: printf ("\t\tval |= (%s << (%d - cnt)) & (uae_u32)-sign;\n",
1498: bit_mask (curi->size),
1499: bit_size (curi->size));
1500: printf ("\t\tval &= %s;\n", bit_mask (curi->size));
1501: printf ("\t}\n");
1502: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1503: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1504: break;
1505: case i_ASL:
1506: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1507: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1508: start_brace ();
1509: switch (curi->size) {
1510: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1511: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1512: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1513: default: abort ();
1514: }
1515: printf ("\tcnt &= 63;\n");
1516: printf ("\tCLEAR_CZNV;\n");
1517: printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
1518: printf ("\t\tSET_VFLG (val != 0);\n");
1519: printf ("\t\tSET_CFLG (cnt == %d ? val & 1 : 0);\n",
1520: bit_size (curi->size));
1521: duplicate_carry ();
1522: printf ("\t\tval = 0;\n");
1523: if (source_is_imm1_8 (curi))
1524: printf ("\t} else {\n");
1525: else
1526: printf ("\t} else if (cnt > 0) {\n");
1527: printf ("\t\tuae_u32 mask = (%s << (%d - cnt)) & %s;\n",
1528: bit_mask (curi->size),
1529: bit_size (curi->size) - 1,
1530: bit_mask (curi->size));
1531: printf ("\t\tSET_VFLG ((val & mask) != mask && (val & mask) != 0);\n");
1532: printf ("\t\tval <<= cnt - 1;\n");
1533: printf ("\t\tSET_CFLG ((val & %s) >> %d);\n", cmask (curi->size), bit_size (curi->size) - 1);
1534: duplicate_carry ();
1535: printf ("\t\tval <<= 1;\n");
1536: printf ("\t\tval &= %s;\n", bit_mask (curi->size));
1537: printf ("\t}\n");
1538: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1539: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1540: break;
1541: case i_LSR:
1542: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1543: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1544: start_brace ();
1545: switch (curi->size) {
1546: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1547: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1548: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1549: default: abort ();
1550: }
1551: printf ("\tcnt &= 63;\n");
1552: printf ("\tCLEAR_CZNV;\n");
1553: printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
1554: printf ("\t\tSET_CFLG ((cnt == %d) & (val >> %d));\n",
1555: bit_size (curi->size), bit_size (curi->size) - 1);
1556: duplicate_carry ();
1557: printf ("\t\tval = 0;\n");
1558: if (source_is_imm1_8 (curi))
1559: printf ("\t} else {\n");
1560: else
1561: printf ("\t} else if (cnt > 0) {\n");
1562: printf ("\t\tval >>= cnt - 1;\n");
1563: printf ("\t\tSET_CFLG (val & 1);\n");
1564: duplicate_carry ();
1565: printf ("\t\tval >>= 1;\n");
1566: printf ("\t}\n");
1567: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1568: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1569: break;
1570: case i_LSL:
1571: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1572: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1573: start_brace ();
1574: switch (curi->size) {
1575: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1576: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1577: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1578: default: abort ();
1579: }
1580: printf ("\tcnt &= 63;\n");
1581: printf ("\tCLEAR_CZNV;\n");
1582: printf ("\tif (cnt >= %d) {\n", bit_size (curi->size));
1583: printf ("\t\tSET_CFLG (cnt == %d ? val & 1 : 0);\n",
1584: bit_size (curi->size));
1585: duplicate_carry ();
1586: printf ("\t\tval = 0;\n");
1587: if (source_is_imm1_8 (curi))
1588: printf ("\t} else {\n");
1589: else
1590: printf ("\t} else if (cnt > 0) {\n");
1591: printf ("\t\tval <<= (cnt - 1);\n");
1592: printf ("\t\tSET_CFLG ((val & %s) >> %d);\n", cmask (curi->size), bit_size (curi->size) - 1);
1593: duplicate_carry ();
1594: printf ("\t\tval <<= 1;\n");
1595: printf ("\tval &= %s;\n", bit_mask (curi->size));
1596: printf ("\t}\n");
1597: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1598: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1599: break;
1600: case i_ROL:
1601: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1602: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1603: start_brace ();
1604: switch (curi->size) {
1605: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1606: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1607: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1608: default: abort ();
1609: }
1610: printf ("\tcnt &= 63;\n");
1611: printf ("\tCLEAR_CZNV;\n");
1612: if (source_is_imm1_8 (curi))
1613: printf ("{");
1614: else
1615: printf ("\tif (cnt > 0) {\n");
1616: printf ("\tuae_u32 loval;\n");
1617: printf ("\tcnt &= %d;\n", bit_size (curi->size) - 1);
1618: printf ("\tloval = val >> (%d - cnt);\n", bit_size (curi->size));
1619: printf ("\tval <<= cnt;\n");
1620: printf ("\tval |= loval;\n");
1621: printf ("\tval &= %s;\n", bit_mask (curi->size));
1622: printf ("\tSET_CFLG (val & 1);\n");
1623: printf ("}\n");
1624: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1625: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1626: break;
1627: case i_ROR:
1628: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1629: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1630: start_brace ();
1631: switch (curi->size) {
1632: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1633: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1634: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1635: default: abort ();
1636: }
1637: printf ("\tcnt &= 63;\n");
1638: printf ("\tCLEAR_CZNV;\n");
1639: if (source_is_imm1_8 (curi))
1640: printf ("{");
1641: else
1642: printf ("\tif (cnt > 0) {");
1643: printf ("\tuae_u32 hival;\n");
1644: printf ("\tcnt &= %d;\n", bit_size (curi->size) - 1);
1645: printf ("\thival = val << (%d - cnt);\n", bit_size (curi->size));
1646: printf ("\tval >>= cnt;\n");
1647: printf ("\tval |= hival;\n");
1648: printf ("\tval &= %s;\n", bit_mask (curi->size));
1649: printf ("\tSET_CFLG ((val & %s) >> %d);\n", cmask (curi->size), bit_size (curi->size) - 1);
1650: printf ("\t}\n");
1651: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1652: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1653: break;
1654: case i_ROXL:
1655: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1656: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1657: start_brace ();
1658: switch (curi->size) {
1659: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1660: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1661: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1662: default: abort ();
1663: }
1664: printf ("\tcnt &= 63;\n");
1665: printf ("\tCLEAR_CZNV;\n");
1666: if (source_is_imm1_8 (curi))
1667: printf ("{");
1668: else {
1669: force_range_for_rox ("cnt", curi->size);
1670: printf ("\tif (cnt > 0) {\n");
1671: }
1672: printf ("\tcnt--;\n");
1673: printf ("\t{\n\tuae_u32 carry;\n");
1674: printf ("\tuae_u32 loval = val >> (%d - cnt);\n", bit_size (curi->size) - 1);
1675: printf ("\tcarry = loval & 1;\n");
1676: printf ("\tval = (((val << 1) | GET_XFLG) << cnt) | (loval >> 1);\n");
1677: printf ("\tSET_XFLG (carry);\n");
1678: printf ("\tval &= %s;\n", bit_mask (curi->size));
1679: printf ("\t} }\n");
1680: printf ("\tSET_CFLG (GET_XFLG);\n");
1681: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1682: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1683: break;
1684: case i_ROXR:
1685: genamode (curi->smode, "srcreg", curi->size, "cnt", 1, 0);
1686: genamode (curi->dmode, "dstreg", curi->size, "data", 1, 0);
1687: start_brace ();
1688: switch (curi->size) {
1689: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1690: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1691: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1692: default: abort ();
1693: }
1694: printf ("\tcnt &= 63;\n");
1695: printf ("\tCLEAR_CZNV;\n");
1696: if (source_is_imm1_8 (curi))
1697: printf ("{");
1698: else {
1699: force_range_for_rox ("cnt", curi->size);
1700: printf ("\tif (cnt > 0) {\n");
1701: }
1702: printf ("\tcnt--;\n");
1703: printf ("\t{\n\tuae_u32 carry;\n");
1704: printf ("\tuae_u32 hival = (val << 1) | GET_XFLG;\n");
1705: printf ("\thival <<= (%d - cnt);\n", bit_size (curi->size) - 1);
1706: printf ("\tval >>= cnt;\n");
1707: printf ("\tcarry = val & 1;\n");
1708: printf ("\tval >>= 1;\n");
1709: printf ("\tval |= hival;\n");
1710: printf ("\tSET_XFLG (carry);\n");
1711: printf ("\tval &= %s;\n", bit_mask (curi->size));
1712: printf ("\t} }\n");
1713: printf ("\tSET_CFLG (GET_XFLG);\n");
1714: genflags (flag_logical_noclobber, curi->size, "val", "", "");
1715: genastore ("val", curi->dmode, "dstreg", curi->size, "data");
1716: break;
1717: case i_ASRW:
1718: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1719: start_brace ();
1720: switch (curi->size) {
1721: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1722: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1723: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1724: default: abort ();
1725: }
1726: printf ("\tuae_u32 sign = %s & val;\n", cmask (curi->size));
1727: printf ("\tuae_u32 cflg = val & 1;\n");
1728: printf ("\tval = (val >> 1) | sign;\n");
1729: genflags (flag_logical, curi->size, "val", "", "");
1730: printf ("\tSET_CFLG (cflg);\n");
1731: duplicate_carry ();
1732: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1733: break;
1734: case i_ASLW:
1735: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1736: start_brace ();
1737: switch (curi->size) {
1738: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1739: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1740: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1741: default: abort ();
1742: }
1743: printf ("\tuae_u32 sign = %s & val;\n", cmask (curi->size));
1744: printf ("\tuae_u32 sign2;\n");
1745: printf ("\tval <<= 1;\n");
1746: genflags (flag_logical, curi->size, "val", "", "");
1747: printf ("\tsign2 = %s & val;\n", cmask (curi->size));
1748: printf ("\tSET_CFLG (sign != 0);\n");
1749: duplicate_carry ();
1750:
1751: printf ("\tSET_VFLG (GET_VFLG | (sign2 != sign));\n");
1752: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1753: break;
1754: case i_LSRW:
1755: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1756: start_brace ();
1757: switch (curi->size) {
1758: case sz_byte: printf ("\tuae_u32 val = (uae_u8)data;\n"); break;
1759: case sz_word: printf ("\tuae_u32 val = (uae_u16)data;\n"); break;
1760: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1761: default: abort ();
1762: }
1763: printf ("\tuae_u32 carry = val & 1;\n");
1764: printf ("\tval >>= 1;\n");
1765: genflags (flag_logical, curi->size, "val", "", "");
1766: printf ("SET_CFLG (carry);\n");
1767: duplicate_carry ();
1768: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1769: break;
1770: case i_LSLW:
1771: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1772: start_brace ();
1773: switch (curi->size) {
1774: case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
1775: case sz_word: printf ("\tuae_u16 val = data;\n"); break;
1776: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1777: default: abort ();
1778: }
1779: printf ("\tuae_u32 carry = val & %s;\n", cmask (curi->size));
1780: printf ("\tval <<= 1;\n");
1781: genflags (flag_logical, curi->size, "val", "", "");
1782: printf ("SET_CFLG (carry >> %d);\n", bit_size (curi->size) - 1);
1783: duplicate_carry ();
1784: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1785: break;
1786: case i_ROLW:
1787: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1788: start_brace ();
1789: switch (curi->size) {
1790: case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
1791: case sz_word: printf ("\tuae_u16 val = data;\n"); break;
1792: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1793: default: abort ();
1794: }
1795: printf ("\tuae_u32 carry = val & %s;\n", cmask (curi->size));
1796: printf ("\tval <<= 1;\n");
1797: printf ("\tif (carry) val |= 1;\n");
1798: genflags (flag_logical, curi->size, "val", "", "");
1799: printf ("SET_CFLG (carry >> %d);\n", bit_size (curi->size) - 1);
1800: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1801: break;
1802: case i_RORW:
1803: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1804: start_brace ();
1805: switch (curi->size) {
1806: case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
1807: case sz_word: printf ("\tuae_u16 val = data;\n"); break;
1808: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1809: default: abort ();
1810: }
1811: printf ("\tuae_u32 carry = val & 1;\n");
1812: printf ("\tval >>= 1;\n");
1813: printf ("\tif (carry) val |= %s;\n", cmask (curi->size));
1814: genflags (flag_logical, curi->size, "val", "", "");
1815: printf ("SET_CFLG (carry);\n");
1816: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1817: break;
1818: case i_ROXLW:
1819: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1820: start_brace ();
1821: switch (curi->size) {
1822: case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
1823: case sz_word: printf ("\tuae_u16 val = data;\n"); break;
1824: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1825: default: abort ();
1826: }
1827: printf ("\tuae_u32 carry = val & %s;\n", cmask (curi->size));
1828: printf ("\tval <<= 1;\n");
1829: printf ("\tif (GET_XFLG) val |= 1;\n");
1830: genflags (flag_logical, curi->size, "val", "", "");
1831: printf ("SET_CFLG (carry >> %d);\n", bit_size (curi->size) - 1);
1832: duplicate_carry ();
1833: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1834: break;
1835: case i_ROXRW:
1836: genamode (curi->smode, "srcreg", curi->size, "data", 1, 0);
1837: start_brace ();
1838: switch (curi->size) {
1839: case sz_byte: printf ("\tuae_u8 val = data;\n"); break;
1840: case sz_word: printf ("\tuae_u16 val = data;\n"); break;
1841: case sz_long: printf ("\tuae_u32 val = data;\n"); break;
1842: default: abort ();
1843: }
1844: printf ("\tuae_u32 carry = val & 1;\n");
1845: printf ("\tval >>= 1;\n");
1846: printf ("\tif (GET_XFLG) val |= %s;\n", cmask (curi->size));
1847: genflags (flag_logical, curi->size, "val", "", "");
1848: printf ("SET_CFLG (carry);\n");
1849: duplicate_carry ();
1850: genastore ("val", curi->smode, "srcreg", curi->size, "data");
1851: break;
1852: case i_MOVEC2:
1853: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1854: start_brace ();
1855: printf ("\tint regno = (src >> 12) & 15;\n");
1856: printf ("\tuae_u32 *regp = regs.regs + regno;\n");
1857: printf ("\tif (! m68k_movec2(src & 0xFFF, regp)) goto %s;\n", endlabelstr);
1858: break;
1859: case i_MOVE2C:
1860: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1861: start_brace ();
1862: printf ("\tint regno = (src >> 12) & 15;\n");
1863: printf ("\tuae_u32 *regp = regs.regs + regno;\n");
1864: printf ("\tif (! m68k_move2c(src & 0xFFF, regp)) goto %s;\n", endlabelstr);
1865: break;
1866: case i_CAS:
1867: {
1868: int old_brace_level;
1869: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
1870: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1871: start_brace ();
1872: printf ("\tint ru = (src >> 6) & 7;\n");
1873: printf ("\tint rc = src & 7;\n");
1874: genflags (flag_cmp, curi->size, "newv", "m68k_dreg(regs, rc)", "dst");
1875: printf ("\tif (GET_ZFLG)");
1876: old_brace_level = n_braces;
1877: start_brace ();
1878: genastore ("(m68k_dreg(regs, ru))", curi->dmode, "dstreg", curi->size, "dst");
1879: pop_braces (old_brace_level);
1880: printf ("else");
1881: start_brace ();
1882: printf ("m68k_dreg(regs, rc) = dst;\n");
1883: pop_braces (old_brace_level);
1884: }
1885: break;
1886: case i_CAS2:
1887: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
1888: printf ("\tuae_u32 rn1 = regs.regs[(extra >> 28) & 15];\n");
1889: printf ("\tuae_u32 rn2 = regs.regs[(extra >> 12) & 15];\n");
1890: if (curi->size == sz_word) {
1891: int old_brace_level = n_braces;
1892: printf ("\tuae_u16 dst1 = get_word(rn1), dst2 = get_word(rn2);\n");
1893: genflags (flag_cmp, curi->size, "newv", "m68k_dreg(regs, (extra >> 16) & 7)", "dst1");
1894: printf ("\tif (GET_ZFLG) {\n");
1895: genflags (flag_cmp, curi->size, "newv", "m68k_dreg(regs, extra & 7)", "dst2");
1896: printf ("\tif (GET_ZFLG) {\n");
1897: printf ("\tput_word(rn1, m68k_dreg(regs, (extra >> 22) & 7));\n");
1898: printf ("\tput_word(rn1, m68k_dreg(regs, (extra >> 6) & 7));\n");
1899: printf ("\t}}\n");
1900: pop_braces (old_brace_level);
1901: printf ("\tif (! GET_ZFLG) {\n");
1902: printf ("\tm68k_dreg(regs, (extra >> 22) & 7) = (m68k_dreg(regs, (extra >> 22) & 7) & ~0xffff) | (dst1 & 0xffff);\n");
1903: printf ("\tm68k_dreg(regs, (extra >> 6) & 7) = (m68k_dreg(regs, (extra >> 6) & 7) & ~0xffff) | (dst2 & 0xffff);\n");
1904: printf ("\t}\n");
1905: } else {
1906: int old_brace_level = n_braces;
1907: printf ("\tuae_u32 dst1 = get_long(rn1), dst2 = get_long(rn2);\n");
1908: genflags (flag_cmp, curi->size, "newv", "m68k_dreg(regs, (extra >> 16) & 7)", "dst1");
1909: printf ("\tif (GET_ZFLG) {\n");
1910: genflags (flag_cmp, curi->size, "newv", "m68k_dreg(regs, extra & 7)", "dst2");
1911: printf ("\tif (GET_ZFLG) {\n");
1912: printf ("\tput_long(rn1, m68k_dreg(regs, (extra >> 22) & 7));\n");
1913: printf ("\tput_long(rn1, m68k_dreg(regs, (extra >> 6) & 7));\n");
1914: printf ("\t}}\n");
1915: pop_braces (old_brace_level);
1916: printf ("\tif (! GET_ZFLG) {\n");
1917: printf ("\tm68k_dreg(regs, (extra >> 22) & 7) = dst1;\n");
1918: printf ("\tm68k_dreg(regs, (extra >> 6) & 7) = dst2;\n");
1919: printf ("\t}\n");
1920: }
1921: break;
1922: case i_MOVES: /* ignore DFC and SFC because we have no MMU */
1923: {
1924: int old_brace_level;
1925: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
1926: printf ("\tif (extra & 0x800)\n");
1927: old_brace_level = n_braces;
1928: start_brace ();
1929: printf ("\tuae_u32 src = regs.regs[(extra >> 12) & 15];\n");
1930: genamode (curi->dmode, "dstreg", curi->size, "dst", 2, 0);
1931: genastore ("src", curi->dmode, "dstreg", curi->size, "dst");
1932: pop_braces (old_brace_level);
1933: printf ("else");
1934: start_brace ();
1935: genamode (curi->dmode, "dstreg", curi->size, "src", 1, 0);
1936: printf ("\tif (extra & 0x8000) {\n");
1937: switch (curi->size) {
1938: case sz_byte: printf ("\tm68k_areg(regs, (extra >> 12) & 7) = (uae_s32)(uae_s8)src;\n"); break;
1939: case sz_word: printf ("\tm68k_areg(regs, (extra >> 12) & 7) = (uae_s32)(uae_s16)src;\n"); break;
1940: case sz_long: printf ("\tm68k_areg(regs, (extra >> 12) & 7) = src;\n"); break;
1941: default: abort ();
1942: }
1943: printf ("\t} else {\n");
1944: genastore ("src", Dreg, "(extra >> 12) & 7", curi->size, "");
1945: printf ("\t}\n");
1946: pop_braces (old_brace_level);
1947: }
1948: break;
1949: case i_BKPT: /* only needed for hardware emulators */
1950: sync_m68k_pc ();
1951: printf ("\top_illg(opcode);\n");
1952: break;
1953: case i_CALLM: /* not present in 68030 */
1954: sync_m68k_pc ();
1955: printf ("\top_illg(opcode);\n");
1956: break;
1957: case i_RTM: /* not present in 68030 */
1958: sync_m68k_pc ();
1959: printf ("\top_illg(opcode);\n");
1960: break;
1961: case i_TRAPcc:
1962: if (curi->smode != am_unknown && curi->smode != am_illg)
1963: genamode (curi->smode, "srcreg", curi->size, "dummy", 1, 0);
1964: printf ("\tif (cctrue(%d)) { Exception(7,m68k_getpc()); goto %s; }\n", curi->cc, endlabelstr);
1965: need_endlabel = 1;
1966: break;
1967: case i_DIVL:
1968: sync_m68k_pc ();
1969: start_brace ();
1970: printf ("\tuaecptr oldpc = m68k_getpc();\n");
1971: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
1972: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1973: sync_m68k_pc ();
1974: printf ("\tm68k_divl(opcode, dst, extra, oldpc);\n");
1975: break;
1976: case i_MULL:
1977: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
1978: genamode (curi->dmode, "dstreg", curi->size, "dst", 1, 0);
1979: sync_m68k_pc ();
1980: printf ("\tm68k_mull(opcode, dst, extra);\n");
1981: break;
1982: case i_BFTST:
1983: case i_BFEXTU:
1984: case i_BFCHG:
1985: case i_BFEXTS:
1986: case i_BFCLR:
1987: case i_BFFFO:
1988: case i_BFSET:
1989: case i_BFINS:
1990: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
1991: genamode (curi->dmode, "dstreg", sz_long, "dst", 2, 0);
1992: start_brace ();
1993: printf ("\tuae_s32 offset = extra & 0x800 ? m68k_dreg(regs, (extra >> 6) & 7) : (extra >> 6) & 0x1f;\n");
1994: printf ("\tint width = (((extra & 0x20 ? m68k_dreg(regs, extra & 7) : extra) -1) & 0x1f) +1;\n");
1995: if (curi->dmode == Dreg) {
1996: printf ("\tuae_u32 tmp = m68k_dreg(regs, dstreg) << (offset & 0x1f);\n");
1997: } else {
1998: printf ("\tuae_u32 tmp,bf0,bf1;\n");
1999: printf ("\tdsta += (offset >> 3) | (offset & 0x80000000 ? ~0x1fffffff : 0);\n");
2000: printf ("\tbf0 = get_long(dsta);bf1 = get_byte(dsta+4) & 0xff;\n");
2001: printf ("\ttmp = (bf0 << (offset & 7)) | (bf1 >> (8 - (offset & 7)));\n");
2002: }
2003: printf ("\ttmp >>= (32 - width);\n");
2004: printf ("\tSET_NFLG (tmp & (1 << (width-1)) ? 1 : 0);\n");
2005: printf ("\tSET_ZFLG (tmp == 0); SET_VFLG (0); SET_CFLG (0);\n");
2006: switch (curi->mnemo) {
2007: case i_BFTST:
2008: break;
2009: case i_BFEXTU:
2010: printf ("\tm68k_dreg(regs, (extra >> 12) & 7) = tmp;\n");
2011: break;
2012: case i_BFCHG:
2013: printf ("\ttmp = ~tmp;\n");
2014: break;
2015: case i_BFEXTS:
2016: printf ("\tif (GET_NFLG) tmp |= width == 32 ? 0 : (-1 << width);\n");
2017: printf ("\tm68k_dreg(regs, (extra >> 12) & 7) = tmp;\n");
2018: break;
2019: case i_BFCLR:
2020: printf ("\ttmp = 0;\n");
2021: break;
2022: case i_BFFFO:
2023: printf ("\t{ uae_u32 mask = 1 << (width-1);\n");
2024: printf ("\twhile (mask) { if (tmp & mask) break; mask >>= 1; offset++; }}\n");
2025: printf ("\tm68k_dreg(regs, (extra >> 12) & 7) = offset;\n");
2026: break;
2027: case i_BFSET:
2028: printf ("\ttmp = 0xffffffff;\n");
2029: break;
2030: case i_BFINS:
2031: printf ("\ttmp = m68k_dreg(regs, (extra >> 12) & 7);\n");
2032: break;
2033: default:
2034: break;
2035: }
2036: if (curi->mnemo == i_BFCHG
2037: || curi->mnemo == i_BFCLR
2038: || curi->mnemo == i_BFSET
2039: || curi->mnemo == i_BFINS)
2040: {
2041: printf ("\ttmp <<= (32 - width);\n");
2042: if (curi->dmode == Dreg) {
2043: printf ("\tm68k_dreg(regs, dstreg) = (m68k_dreg(regs, dstreg) & ((offset & 0x1f) == 0 ? 0 :\n");
2044: printf ("\t\t(0xffffffff << (32 - (offset & 0x1f))))) |\n");
2045: printf ("\t\t(tmp >> (offset & 0x1f)) |\n");
2046: printf ("\t\t(((offset & 0x1f) + width) >= 32 ? 0 :\n");
2047: printf (" (m68k_dreg(regs, dstreg) & ((uae_u32)0xffffffff >> ((offset & 0x1f) + width))));\n");
2048: } else {
2049: printf ("\tbf0 = (bf0 & (0xff000000 << (8 - (offset & 7)))) |\n");
2050: printf ("\t\t(tmp >> (offset & 7)) |\n");
2051: printf ("\t\t(((offset & 7) + width) >= 32 ? 0 :\n");
2052: printf ("\t\t (bf0 & ((uae_u32)0xffffffff >> ((offset & 7) + width))));\n");
2053: printf ("\tput_long(dsta,bf0 );\n");
2054: printf ("\tif (((offset & 7) + width) > 32) {\n");
2055: printf ("\t\tbf1 = (bf1 & (0xff >> (width - 32 + (offset & 7)))) |\n");
2056: printf ("\t\t\t(tmp << (8 - (offset & 7)));\n");
2057: printf ("\t\tput_byte(dsta+4,bf1);\n");
2058: printf ("\t}\n");
2059: }
2060: }
2061: break;
2062: case i_PACK:
2063: if (curi->smode == Dreg) {
2064: printf ("\tuae_u16 val = m68k_dreg(regs, srcreg) + %s;\n", gen_nextiword ());
2065: printf ("\tm68k_dreg(regs, dstreg) = (m68k_dreg(regs, dstreg) & 0xffffff00) | ((val >> 4) & 0xf0) | (val & 0xf);\n");
2066: } else {
2067: printf ("\tuae_u16 val;\n");
2068: printf ("\tm68k_areg(regs, srcreg) -= areg_byteinc[srcreg];\n");
2069: printf ("\tval = (uae_u16)get_byte(m68k_areg(regs, srcreg));\n");
2070: printf ("\tm68k_areg(regs, srcreg) -= areg_byteinc[srcreg];\n");
2071: printf ("\tval = (val | ((uae_u16)get_byte(m68k_areg(regs, srcreg)) << 8)) + %s;\n", gen_nextiword ());
2072: printf ("\tm68k_areg(regs, dstreg) -= areg_byteinc[dstreg];\n");
2073: printf ("\tput_byte(m68k_areg(regs, dstreg),((val >> 4) & 0xf0) | (val & 0xf));\n");
2074: }
2075: break;
2076: case i_UNPK:
2077: if (curi->smode == Dreg) {
2078: printf ("\tuae_u16 val = m68k_dreg(regs, srcreg);\n");
2079: printf ("\tval = (((val << 4) & 0xf00) | (val & 0xf)) + %s;\n", gen_nextiword ());
2080: printf ("\tm68k_dreg(regs, dstreg) = (m68k_dreg(regs, dstreg) & 0xffff0000) | (val & 0xffff);\n");
2081: } else {
2082: printf ("\tuae_u16 val;\n");
2083: printf ("\tm68k_areg(regs, srcreg) -= areg_byteinc[srcreg];\n");
2084: printf ("\tval = (uae_u16)get_byte(m68k_areg(regs, srcreg));\n");
2085: printf ("\tval = (((val << 4) & 0xf00) | (val & 0xf)) + %s;\n", gen_nextiword ());
2086: printf ("\tm68k_areg(regs, dstreg) -= areg_byteinc[dstreg];\n");
2087: printf ("\tput_byte(m68k_areg(regs, dstreg),val);\n");
2088: printf ("\tm68k_areg(regs, dstreg) -= areg_byteinc[dstreg];\n");
2089: printf ("\tput_byte(m68k_areg(regs, dstreg),val >> 8);\n");
2090: }
2091: break;
2092: case i_TAS:
2093: genamode (curi->smode, "srcreg", curi->size, "src", 1, 0);
2094: genflags (flag_logical, curi->size, "src", "", "");
2095: printf ("\tsrc |= 0x80;\n");
2096: genastore ("src", curi->smode, "srcreg", curi->size, "src");
2097: break;
2098: case i_FPP:
2099: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2100: sync_m68k_pc ();
2101: printf ("\tfpp_opp(opcode,extra);\n");
2102: break;
2103: case i_FDBcc:
2104: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2105: sync_m68k_pc ();
2106: printf ("\tfdbcc_opp(opcode,extra);\n");
2107: break;
2108: case i_FScc:
2109: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2110: sync_m68k_pc ();
2111: printf ("\tfscc_opp(opcode,extra);\n");
2112: break;
2113: case i_FTRAPcc:
2114: sync_m68k_pc ();
2115: start_brace ();
2116: printf ("\tuaecptr oldpc = m68k_getpc();\n");
2117: if (curi->smode != am_unknown && curi->smode != am_illg)
2118: genamode (curi->smode, "srcreg", curi->size, "dummy", 1, 0);
2119: sync_m68k_pc ();
2120: printf ("\tftrapcc_opp(opcode,oldpc);\n");
2121: break;
2122: case i_FBcc:
2123: sync_m68k_pc ();
2124: start_brace ();
2125: printf ("\tuaecptr pc = m68k_getpc();\n");
2126: genamode (curi->dmode, "srcreg", curi->size, "extra", 1, 0);
2127: sync_m68k_pc ();
2128: printf ("\tfbcc_opp(opcode,pc,extra);\n");
2129: break;
2130: case i_FSAVE:
2131: sync_m68k_pc ();
2132: printf ("\tfsave_opp(opcode);\n");
2133: break;
2134: case i_FRESTORE:
2135: sync_m68k_pc ();
2136: printf ("\tfrestore_opp(opcode);\n");
2137: break;
2138:
2139: case i_CINVL:
2140: case i_CINVP:
2141: case i_CINVA:
2142: case i_CPUSHL:
2143: case i_CPUSHP:
2144: case i_CPUSHA:
2145: break;
2146: case i_MOVE16:
2147: printf ("\tuaecptr mems = m68k_areg(regs, srcreg) & ~15, memd;\n");
2148: printf ("\tdstreg = (%s >> 12) & 7;\n", gen_nextiword());
2149: printf ("\tmemd = m68k_areg(regs, dstreg) & ~15;\n");
2150: printf ("\tput_long(memd, get_long(mems));\n");
2151: printf ("\tput_long(memd+4, get_long(mems+4));\n");
2152: printf ("\tput_long(memd+8, get_long(mems+8));\n");
2153: printf ("\tput_long(memd+12, get_long(mems+12));\n");
2154: printf ("\tm68k_areg(regs, srcreg) += 16;\n");
2155: printf ("\tm68k_areg(regs, dstreg) += 16;\n");
2156: break;
2157:
2158: case i_MMUOP:
2159: genamode (curi->smode, "srcreg", curi->size, "extra", 1, 0);
2160: sync_m68k_pc ();
2161: printf ("\tmmu_op(opcode,extra);\n");
2162: break;
2163: default:
2164: abort ();
2165: break;
2166: }
2167: finish_braces ();
2168: sync_m68k_pc ();
2169: }
2170:
2171: static void generate_includes (FILE * f)
2172: {
2173: fprintf (f, "#include \"sysdeps.h\"\n");
2174: fprintf (f, "#include \"hatari-glue.h\"\n");
2175: fprintf (f, "#include \"maccess.h\"\n");
2176: fprintf (f, "#include \"memory.h\"\n");
2177: fprintf (f, "#include \"newcpu.h\"\n");
2178: fprintf (f, "#include \"compiler.h\"\n");
2179: fprintf (f, "#include \"cputbl.h\"\n");
2180: /*
2181: fprintf (f, "#include \"sysconfig.h\"\n");
2182: fprintf (f, "#include \"config.h\"\n");
2183: fprintf (f, "#include \"options.h\"\n");
2184: fprintf (f, "#include \"custom.h\"\n");
2185: */
2186: fprintf (f, "#define CPUFUNC(x) x##_ff\n"
2187: "#ifdef NOFLAGS\n"
2188: "#include \"noflags.h\"\n"
2189: "#endif\n");
2190: }
2191:
2192: static int postfix;
2193:
2194: static void generate_one_opcode (int rp)
2195: {
2196: int i;
2197: uae_u16 smsk, dmsk;
2198: long int opcode = opcode_map[rp];
2199:
2200: if (table68k[opcode].mnemo == i_ILLG
2201: || table68k[opcode].clev > cpu_level)
2202: return;
2203:
2204: for (i = 0; lookuptab[i].name[0]; i++) {
2205: if (table68k[opcode].mnemo == lookuptab[i].mnemo)
2206: break;
2207: }
2208:
2209: if (table68k[opcode].handler != -1)
2210: return;
2211:
2212: if (opcode_next_clev[rp] != cpu_level) {
2213: fprintf (stblfile, "{ CPUFUNC(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, opcode_last_postfix[rp],
2214: opcode, lookuptab[i].name);
2215: return;
2216: }
2217: fprintf (stblfile, "{ CPUFUNC(op_%lx_%d), 0, %ld }, /* %s */\n", opcode, postfix, opcode, lookuptab[i].name);
2218: fprintf (headerfile, "extern cpuop_func op_%lx_%d_nf;\n", opcode, postfix);
2219: fprintf (headerfile, "extern cpuop_func op_%lx_%d_ff;\n", opcode, postfix);
2220: printf ("unsigned long REGPARAM2 CPUFUNC(op_%lx_%d)(uae_u32 opcode) /* %s */\n{\n", opcode, postfix, lookuptab[i].name);
2221:
2222: switch (table68k[opcode].stype) {
2223: case 0: smsk = 7; break;
2224: case 1: smsk = 255; break;
2225: case 2: smsk = 15; break;
2226: case 3: smsk = 7; break;
2227: case 4: smsk = 7; break;
2228: case 5: smsk = 63; break;
2229: default: abort ();
2230: }
2231: dmsk = 7;
2232:
2233: next_cpu_level = -1;
2234: if (table68k[opcode].suse
2235: && table68k[opcode].smode != imm && table68k[opcode].smode != imm0
2236: && table68k[opcode].smode != imm1 && table68k[opcode].smode != imm2
2237: && table68k[opcode].smode != absw && table68k[opcode].smode != absl
2238: && table68k[opcode].smode != PC8r && table68k[opcode].smode != PC16)
2239: {
2240: if (table68k[opcode].spos == -1) {
2241: if (((int) table68k[opcode].sreg) >= 128)
2242: printf ("\tuae_u32 srcreg = (uae_s32)(uae_s8)%d;\n", (int) table68k[opcode].sreg);
2243: else
2244: printf ("\tuae_u32 srcreg = %d;\n", (int) table68k[opcode].sreg);
2245: } else {
2246: char source[100];
2247: int pos = table68k[opcode].spos;
2248:
2249: if (pos)
2250: sprintf (source, "((opcode >> %d) & %d)", pos, smsk);
2251: else
2252: sprintf (source, "(opcode & %d)", smsk);
2253:
2254: if (table68k[opcode].stype == 3)
2255: printf ("\tuae_u32 srcreg = imm8_table[%s];\n", source);
2256: else if (table68k[opcode].stype == 1)
2257: printf ("\tuae_u32 srcreg = (uae_s32)(uae_s8)%s;\n", source);
2258: else
2259: printf ("\tuae_u32 srcreg = %s;\n", source);
2260: }
2261: }
2262: if (table68k[opcode].duse
2263: /* Yes, the dmode can be imm, in case of LINK or DBcc */
2264: && table68k[opcode].dmode != imm && table68k[opcode].dmode != imm0
2265: && table68k[opcode].dmode != imm1 && table68k[opcode].dmode != imm2
2266: && table68k[opcode].dmode != absw && table68k[opcode].dmode != absl)
2267: {
2268: if (table68k[opcode].dpos == -1) {
2269: if (((int) table68k[opcode].dreg) >= 128)
2270: printf ("\tuae_u32 dstreg = (uae_s32)(uae_s8)%d;\n", (int) table68k[opcode].dreg);
2271: else
2272: printf ("\tuae_u32 dstreg = %d;\n", (int) table68k[opcode].dreg);
2273: } else {
2274: int pos = table68k[opcode].dpos;
2275: #if 0
2276: /* Check that we can do the little endian optimization safely. */
2277: if (pos < 8 && (dmsk >> (8 - pos)) != 0)
2278: abort ();
2279: #endif
2280: if (pos)
2281: printf ("\tuae_u32 dstreg = (opcode >> %d) & %d;\n",
2282: pos, dmsk);
2283: else
2284: printf ("\tuae_u32 dstreg = opcode & %d;\n", dmsk);
2285: }
2286: }
2287: need_endlabel = 0;
2288: endlabelno++;
2289: sprintf (endlabelstr, "endlabel%d", endlabelno);
2290: gen_opcode (opcode);
2291: if (need_endlabel)
2292: printf ("%s: ;\n", endlabelstr);
2293: printf ("return %d;\n", insn_n_cycles / 2);
2294: printf ("}\n");
2295: opcode_next_clev[rp] = next_cpu_level;
2296: opcode_last_postfix[rp] = postfix;
2297: }
2298:
2299: static void generate_func (void)
2300: {
2301: int i, j, rp;
2302:
2303: using_prefetch = 0;
2304: using_exception_3 = 0;
2305: for (i = 0; i < 6; i++) {
2306: cpu_level = 4 - i;
2307: if (i == 5) {
2308: cpu_level = 0;
2309: using_prefetch = 1;
2310: using_exception_3 = 1;
2311: for (rp = 0; rp < nr_cpuop_funcs; rp++)
2312: opcode_next_clev[rp] = 0;
2313: }
2314:
2315: postfix = i;
2316: fprintf (stblfile, "struct cputbl CPUFUNC(op_smalltbl_%d)[] = {\n", postfix);
2317:
2318: /* sam: this is for people with low memory (eg. me :)) */
2319: printf ("\n"
2320: "#if !defined(PART_1) && !defined(PART_2) && "
2321: "!defined(PART_3) && !defined(PART_4) && "
2322: "!defined(PART_5) && !defined(PART_6) && "
2323: "!defined(PART_7) && !defined(PART_8)"
2324: "\n"
2325: "#define PART_1 1\n"
2326: "#define PART_2 1\n"
2327: "#define PART_3 1\n"
2328: "#define PART_4 1\n"
2329: "#define PART_5 1\n"
2330: "#define PART_6 1\n"
2331: "#define PART_7 1\n"
2332: "#define PART_8 1\n"
2333: "#endif\n\n");
2334:
2335: rp = 0;
2336: for(j=1;j<=8;++j) {
2337: int k = (j*nr_cpuop_funcs)/8;
2338: printf ("#ifdef PART_%d\n",j);
2339: for (; rp < k; rp++)
2340: generate_one_opcode (rp);
2341: printf ("#endif\n\n");
2342: }
2343:
2344: fprintf (stblfile, "{ 0, 0, 0 }};\n");
2345: }
2346:
2347: }
2348:
2349: int main (int argc, char **argv)
2350: {
2351: read_table68k ();
2352: do_merges ();
2353:
2354: opcode_map = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
2355: opcode_last_postfix = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
2356: opcode_next_clev = (int *) malloc (sizeof (int) * nr_cpuop_funcs);
2357: counts = (unsigned long *) malloc (65536 * sizeof (unsigned long));
2358: read_counts ();
2359:
2360: /* It would be a lot nicer to put all in one file (we'd also get rid of
2361: * cputbl.h that way), but cpuopti can't cope. That could be fixed, but
2362: * I don't dare to touch the 68k version. */
2363:
2364: headerfile = fopen ("cputbl.h", "wb");
2365: stblfile = fopen ("cpustbl.c", "wb");
2366: freopen ("cpuemu.c", "wb", stdout);
2367:
2368: generate_includes (stdout);
2369: generate_includes (stblfile);
2370:
2371: generate_func ();
2372:
2373: free (table68k);
2374: return 0;
2375: }
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