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SekRunPS Cyclone integration
[picodrive.git] / cpu / Cyclone / Main.cpp
CommitLineData
cc68a136 1\r
2#include "app.h"\r
3\r
4static FILE *AsmFile=NULL;\r
5\r
6static int CycloneVer=0x0086; // Version number of library\r
7int *CyJump=NULL; // Jump table\r
8int ms=USE_MS_SYNTAX; // If non-zero, output in Microsoft ARMASM format\r
9char *Narm[4]={ "b", "h","",""}; // Normal ARM Extensions for operand sizes 0,1,2\r
10char *Sarm[4]={"sb","sh","",""}; // Sign-extend ARM Extensions for operand sizes 0,1,2\r
11int Cycles; // Current cycles for opcode\r
12\r
13\r
14void ot(const char *format, ...)\r
15{\r
16 va_list valist=NULL;\r
17 int i, len;\r
18\r
19 // notaz: stop me from leaving newlines in the middle of format string\r
20 // and generating bad code\r
21 for(i=0, len=strlen(format); i < len && format[i] != '\n'; i++);\r
22 if(i < len-1 && format[len-1] != '\n') printf("\nWARNING: possible improper newline placement:\n%s\n", format);\r
23\r
24 va_start(valist,format);\r
25 if (AsmFile) vfprintf(AsmFile,format,valist);\r
26 va_end(valist);\r
27}\r
28\r
29void ltorg()\r
30{\r
31 if (ms) ot(" LTORG\n");\r
32 else ot(" .ltorg\n");\r
33}\r
34\r
35// trashes all temp regs\r
36static void PrintException(int ints)\r
37{\r
38 if(!ints) {\r
39 ot(" ;@ Cause an Exception - Vector address in r0\n");\r
40 ot(" mov r11,r0\n");\r
41 }\r
42\r
43 ot(";@ swap OSP <-> A7?\n");\r
44 ot(" ldr r0,[r7,#0x44] ;@ Get SR high\n");\r
45 ot(" tst r0,#0x20\n");\r
46 ot(" bne no_sp_swap%i\n",ints);\r
47 ot(";@ swap OSP and A7:\n");\r
48 ot(" ldr r0,[r7,#0x3C] ;@ Get A7\n");\r
49 ot(" ldr r1,[r7,#0x48] ;@ Get OSP\n");\r
50 ot(" str r0,[r7,#0x48]\n");\r
51 ot(" str r1,[r7,#0x3C]\n");\r
52 ot("no_sp_swap%i%s\n",ints,ms?"":":");\r
53\r
54 ot(" ldr r10,[r7,#0x60] ;@ Get Memory base\n");\r
55 ot(" mov r1,r4,lsl #8\n");\r
56 ot(" sub r1,r1,r10,lsl #8 ;@ r1 = Old PC\n");\r
57 ot(" mov r1,r1,asr #8 ;@ push sign extended\n");\r
58 OpPush32();\r
59 OpPushSr(1);\r
60 ot(" mov r0,r11\n");\r
61 ot(";@ Read IRQ Vector:\n");\r
62 MemHandler(0,2);\r
63 if(ints) {\r
64 ot(" tst r0,r0 ;@ uninitialized int vector?\n");\r
65 ot(" moveq r0,#0x3c\n");\r
66 ot(" moveq lr,pc\n");\r
67 ot(" ldreq pc,[r7,#0x70] ;@ Call read32(r0) handler\n");\r
68 }\r
69#if USE_CHECKPC_CALLBACK\r
70 ot(" add r0,r0,r10 ;@ r0 = Memory Base + New PC\n");\r
71 ot(" mov lr,pc\n");\r
72 ot(" ldr pc,[r7,#0x64] ;@ Call checkpc()\n");\r
73 ot(" mov r4,r0\n");\r
74#endif\r
75 ot("\n");\r
76\r
77 if(!ints) {\r
78 ot(" ldr r0,[r7,#0x44] ;@ Get SR high\n");\r
79 ot(" bic r0,r0,#0xd8 ;@ clear trace and unused flags\n");\r
80 ot(" orr r0,r0,#0x20 ;@ set supervisor mode\n");\r
81 ot(" strb r0,[r7,#0x44]\n");\r
82 }\r
83}\r
84\r
85// Trashes r0,r1\r
86void CheckInterrupt(int op)\r
87{\r
88 ot(";@ CheckInterrupt:\n");\r
89 ot(" ldr r0,[r7,#0x44]\n"); // same as ldrb r0,[r7,#0x47]\r
90 ot(" movs r0,r0,lsr #24 ;@ Get IRQ level (loading word is faster)\n");\r
91 ot(" beq NoInts%x\n",op);\r
92 ot(" cmp r0,#6 ;@ irq>6 ?\n");\r
93 ot(" ldrleb r1,[r7,#0x44] ;@ Get SR high: T_S__III\n");\r
94 ot(" andle r1,r1,#7 ;@ Get interrupt mask\n");\r
95 ot(" cmple r0,r1 ;@ irq<=6: Is irq<=mask ?\n");\r
7336a99a 96 ot(" blgt CycloneDoInterrupt\n");\r
cc68a136 97 ot("NoInts%x%s\n", op,ms?"":":");\r
98 ot("\n");\r
99}\r
100\r
101static void PrintFramework()\r
102{\r
103 ot(";@ --------------------------- Framework --------------------------\n");\r
104 if (ms) ot("CycloneRun\n");\r
105 else ot("CycloneRun:\n");\r
106\r
107 ot(" stmdb sp!,{r4-r11,lr}\n");\r
108\r
109 ot(" mov r7,r0 ;@ r7 = Pointer to Cpu Context\n");\r
110 ot(" ;@ r0-3 = Temporary registers\n");\r
111 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Flags (NZCV)\n");\r
7336a99a 112 ot(" ldr r6,=CycloneJumpTab ;@ r6 = Opcode Jump table\n");\r
cc68a136 113 ot(" ldr r5,[r7,#0x5c] ;@ r5 = Cycles\n");\r
114 ot(" ldr r4,[r7,#0x40] ;@ r4 = Current PC + Memory Base\n");\r
115 ot(" ;@ r8 = Current Opcode\n");\r
116 ot(" ldr r0,[r7,#0x44]\n");\r
117 ot(" mov r9,r9,lsl #28 ;@ r9 = Flags 0xf0000000, cpsr format\n");\r
118 ot(" ;@ r10 = Source value / Memory Base\n");\r
119 ot("\n");\r
120 ot(";@ CheckInterrupt:\n");\r
121 ot(" movs r0,r0,lsr #24 ;@ Get IRQ level\n"); // same as ldrb r0,[r7,#0x47]\r
122 ot(" beq NoInts0\n");\r
123 ot(" cmp r0,#6 ;@ irq>6 ?\n");\r
124 ot(" ldrleb r1,[r7,#0x44] ;@ Get SR high: T_S__III\n");\r
125 ot(" andle r1,r1,#7 ;@ Get interrupt mask\n");\r
126 ot(" cmple r0,r1 ;@ irq<=6: Is irq<=mask ?\n");\r
7336a99a 127 ot(" blgt CycloneDoInterrupt\n");\r
cc68a136 128 ot(";@ Check if interrupt used up all the cycles:\n");\r
129 ot(" subs r5,r5,#0\n");\r
130 ot(" blt CycloneEndNoBack\n");\r
131 ot("NoInts0%s\n", ms?"":":");\r
132 ot("\n");\r
133 ot(";@ Check if our processor is in stopped state and jump to opcode handler if not\n");\r
134 ot(" ldr r0,[r7,#0x58]\n");\r
135 ot(" ldrh r8,[r4],#2 ;@ Fetch first opcode\n");\r
136 ot(" tst r0,r0 ;@ stopped?\n");\r
137 ot(" bne CycloneStopped\n");\r
138 ot(" ldr pc,[r6,r8,asl #2] ;@ Jump to opcode handler\n");\r
139 ot("\n");\r
140 ot("\n");\r
141\r
142 ot(";@ We come back here after execution\n");\r
143 ot("CycloneEnd%s\n", ms?"":":");\r
144 ot(" sub r4,r4,#2\n");\r
145 ot("CycloneEndNoBack%s\n", ms?"":":");\r
7336a99a 146#ifdef CYCLONE_FOR_PICODRIVE\r
147 ot(" ldr r1,[r7,#0x54]\n");\r
cc68a136 148 ot(" mov r9,r9,lsr #28\n");\r
7336a99a 149 ot(" tst r1,r1\n");\r
150 ot(" bxne r1 ;@ jump to alternative CycloneEnd\n");\r
151#else\r
152 ot(" mov r9,r9,lsr #28\n");\r
153#endif\r
cc68a136 154 ot(" str r4,[r7,#0x40] ;@ Save Current PC + Memory Base\n");\r
155 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
156 ot(" strb r9,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
157 ot(" ldmia sp!,{r4-r11,pc}\n");\r
158 ot("\n");\r
159 ot("CycloneStopped%s\n", ms?"":":");\r
160 ot(" mov r5,#0\n");\r
161 ot(" str r5,[r7,#0x5C] ;@ eat all cycles\n");\r
162 ot(" ldmia sp!,{r4-r11,pc} ;@ we are stopped, do nothing!\n");\r
163 ot("\n");\r
164\r
165 ltorg();\r
166\r
167#if COMPRESS_JUMPTABLE\r
168 ot(";@ uncompress jump table\n");\r
169 if (ms) ot("CycloneInit\n");\r
170 else ot("CycloneInit:\n");\r
7336a99a 171 ot(" ldr r12,=CycloneJumpTab\n");\r
cc68a136 172 ot(" add r0,r12,#0xe000*4 ;@ ctrl code pointer\n");\r
173 ot(" ldr r1,[r0,#-4]\n");\r
174 ot(" tst r1,r1\n");\r
175 ot(" movne pc,lr ;@ already uncompressed\n");\r
176 ot(" add r3,r12,#0xa000*4 ;@ handler table pointer, r12=dest\n");\r
177 ot("unc_loop%s\n", ms?"":":");\r
178 ot(" ldrh r1,[r0],#2\n");\r
179 ot(" and r2,r1,#0xf\n");\r
180 ot(" bic r1,r1,#0xf\n");\r
181 ot(" ldr r1,[r3,r1,lsr #2] ;@ r1=handler\n");\r
182 ot(" cmp r2,#0xf\n");\r
183 ot(" addeq r2,r2,#1 ;@ 0xf is really 0x10\n");\r
184 ot(" tst r2,r2\n");\r
185 ot(" ldreqh r2,[r0],#2 ;@ counter is in next word\n");\r
186 ot(" tst r2,r2\n");\r
187 ot(" beq unc_finish ;@ done decompressing\n");\r
188 ot(" tst r1,r1\n");\r
189 ot(" addeq r12,r12,r2,lsl #2 ;@ 0 handler means we should skip those bytes\n");\r
190 ot(" beq unc_loop\n");\r
191 ot("unc_loop_in%s\n", ms?"":":");\r
192 ot(" subs r2,r2,#1\n");\r
193 ot(" str r1,[r12],#4\n");\r
194 ot(" bgt unc_loop_in\n");\r
195 ot(" b unc_loop\n");\r
196 ot("unc_finish%s\n", ms?"":":");\r
7336a99a 197 ot(" ldr r12,=CycloneJumpTab\n");\r
cc68a136 198 ot(" ;@ set a-line and f-line handlers\n");\r
199 ot(" add r0,r12,#0xa000*4\n");\r
200 ot(" ldr r1,[r0,#4] ;@ a-line handler\n");\r
201 ot(" ldr r3,[r0,#8] ;@ f-line handler\n");\r
202 ot(" mov r2,#0x1000\n");\r
203 ot("unc_fill3%s\n", ms?"":":");\r
204 ot(" subs r2,r2,#1\n");\r
205 ot(" str r1,[r0],#4\n");\r
206 ot(" bgt unc_fill3\n");\r
207 ot(" add r0,r12,#0xf000*4\n");\r
208 ot(" mov r2,#0x1000\n");\r
209 ot("unc_fill4%s\n", ms?"":":");\r
210 ot(" subs r2,r2,#1\n");\r
211 ot(" str r3,[r0],#4\n");\r
212 ot(" bgt unc_fill4\n");\r
213 ot(" bx lr\n");\r
214 ltorg();\r
215 ot("\n");\r
216#else\r
217 ot(";@ do nothing\n");\r
218 if (ms) ot("CycloneInit\n");\r
219 else ot("CycloneInit:\n");\r
220 ot(" bx lr\n");\r
221 ot("\n");\r
222#endif\r
223 if (ms) ot("CycloneSetSr\n");\r
224 else ot("CycloneSetSr:\n");\r
225 ot(" mov r2,r1,lsr #8\n");\r
226 ot(" ldrb r3,[r0,#0x44] ;@ get SR high\n");\r
227 ot(" eor r3,r3,r2\n");\r
228 ot(" tst r3,#0x20\n");\r
229 ot(" and r2,r2,#0xa7 ;@ only nonzero bits\n");\r
230 ot(" strb r2,[r0,#0x44] ;@ set SR high\n");\r
231 ot(" bne setsr_noswap\n");\r
232 ot(" ldr r2,[r0,#0x3C] ;@ Get A7\n");\r
233 ot(" ldr r3,[r0,#0x48] ;@ Get OSP\n");\r
234 ot(" str r3,[r0,#0x3C]\n");\r
235 ot(" str r2,[r0,#0x48]\n");\r
236 ot("setsr_noswap%s\n",ms?"":":");\r
237 ot(" mov r2,r1,lsr #3\n");\r
238 ot(" strb r2,[r0,#0x45] ;@ the X flag\n");\r
239 ot(" bic r2,r1,#0xf3\n");\r
240 ot(" tst r1,#1\n");\r
241 ot(" orrne r2,r2,#2\n");\r
242 ot(" tst r1,#2\n");\r
243 ot(" orrne r2,r2,#1\n");\r
244 ot(" strb r2,[r0,#0x46] ;@ flags\n");\r
245 ot(" bx lr\n");\r
246 ot("\n");\r
247\r
248 if (ms) ot("CycloneGetSr\n");\r
249 else ot("CycloneGetSr:\n");\r
250 ot(" ldrb r1,[r0,#0x46] ;@ flags\n");\r
251 ot(" bic r2,r1,#0xf3\n");\r
252 ot(" tst r1,#1\n");\r
253 ot(" orrne r2,r2,#2\n");\r
254 ot(" tst r1,#2\n");\r
255 ot(" orrne r2,r2,#1\n");\r
256 ot(" ldrb r1,[r0,#0x45] ;@ the X flag\n");\r
257 ot(" tst r1,#2\n");\r
258 ot(" orrne r2,r2,#0x10\n");\r
259 ot(" ldrb r1,[r0,#0x44] ;@ the SR high\n");\r
260 ot(" orr r0,r2,r1,lsl #8\n");\r
261 ot(" bx lr\n");\r
262 ot("\n");\r
263\r
264 ot(";@ DoInterrupt - r0=IRQ number\n");\r
7336a99a 265 ot("CycloneDoInterrupt%s\n", ms?"":":");\r
cc68a136 266 ot(" stmdb sp!,{lr} ;@ Push ARM return address\n");\r
267\r
268 ot(";@ Get IRQ Vector address:\n");\r
269 ot(" mov r0,r0,asl #2\n");\r
270 ot(" add r11,r0,#0x60\n");\r
271 PrintException(1);\r
272 \r
273 ot(" ldrb r0,[r7,#0x47] ;@ IRQ\n");\r
274 ot(" mov r2,#0\n");\r
275 ot(" orr r1,r0,#0x20 ;@ Supervisor mode + IRQ number\n");\r
276 ot(" strb r1,[r7,#0x44] ;@ Put SR high\n");\r
277\r
278 ot(";@ Clear stopped states:\n");\r
279 ot(" str r2,[r7,#0x58]\n");\r
280 ot(" sub r5,r5,#%d ;@ Subtract cycles\n",44);\r
281 ot("\n");\r
282#if USE_INT_ACK_CALLBACK\r
283#if INT_ACK_NEEDS_STUFF\r
284 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
285 ot(" mov r1,r9,lsr #28\n");\r
286 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
287 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
288#endif\r
289 ot(" ldr r11,[r7,#0x8c] ;@ IrqCallback\n");\r
290 ot(" tst r11,r11\n");\r
291 ot(" movne lr,pc\n");\r
292 ot(" movne pc,r11 ;@ call IrqCallback if it is defined\n");\r
293#if INT_ACK_CHANGES_STUFF\r
294 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
295 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
296 ot(" mov r9,r9,lsl #28\n");\r
297 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
298#endif\r
299#else // not USE_INT_ACK_CALLBACK\r
300 ot(";@ Clear irq:\n");\r
301 ot(" strb r1,[r7,#0x47]\n");\r
302#endif\r
303 ot(" ldmia sp!,{pc} ;@ Return\n");\r
304 ot("\n");\r
305 \r
306 ot("Exception%s\n", ms?"":":");\r
307 ot("\n");\r
308 ot(" stmdb sp!,{lr} ;@ Preserve ARM return address\n");\r
309 PrintException(0);\r
310 ot(" ldmia sp!,{pc} ;@ Return\n");\r
311 ot("\n");\r
312}\r
313\r
314// ---------------------------------------------------------------------------\r
315// Call Read(r0), Write(r0,r1) or Fetch(r0)\r
316// Trashes r0-r3,r12,lr\r
317int MemHandler(int type,int size)\r
318{\r
319 int func=0;\r
320 func=0x68+type*0xc+(size<<2); // Find correct offset\r
321\r
322#if MEMHANDLERS_NEED_PC\r
323 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
324#endif\r
325#if MEMHANDLERS_NEED_FLAGS\r
326 ot(" mov r3,r9,lsr #28\n");\r
327 ot(" strb r3,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
328#endif\r
329#if MEMHANDLERS_NEED_CYCLES\r
330 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
331#endif\r
332\r
333 ot(" mov lr,pc\n");\r
334 ot(" ldr pc,[r7,#0x%x] ;@ Call ",func);\r
335\r
336 // Document what we are calling:\r
337 if (type==0) ot("read");\r
338 if (type==1) ot("write");\r
339 if (type==2) ot("fetch");\r
340\r
341 if (type==1) ot("%d(r0,r1)",8<<size);\r
342 else ot("%d(r0)", 8<<size);\r
343 ot(" handler\n");\r
344\r
345#if MEMHANDLERS_CHANGE_CYCLES\r
346 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
347#endif\r
348#if MEMHANDLERS_CHANGE_FLAGS\r
349 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
350 ot(" mov r9,r9,lsl #28\n");\r
351#endif\r
352#if MEMHANDLERS_CHANGE_PC\r
353 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
354#endif\r
355\r
356 return 0;\r
357}\r
358\r
359static void PrintOpcodes()\r
360{\r
361 int op=0;\r
362 \r
363 printf("Creating Opcodes: [");\r
364\r
365 ot(";@ ---------------------------- Opcodes ---------------------------\n");\r
366\r
367 // Emit null opcode:\r
368 ot("Op____%s ;@ Called if an opcode is not recognised\n", ms?"":":");\r
369 ot(" sub r4,r4,#2\n");\r
370#if USE_UNRECOGNIZED_CALLBACK\r
371 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
372 ot(" mov r1,r9,lsr #28\n");\r
373 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
374 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
375 ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");\r
376 ot(" tst r11,r11\n");\r
377 ot(" movne lr,pc\n");\r
378 ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");\r
379 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
380 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
381 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
382 ot(" mov r9,r9,lsl #28\n");\r
383 ot(" tst r0,r0\n");\r
384 ot(" moveq r0,#0x10\n");\r
385 ot(" bleq Exception\n");\r
386#else\r
387 ot(" mov r0,#0x10\n");\r
388 ot(" bl Exception\n");\r
389#endif\r
390 Cycles=34;\r
391 OpEnd();\r
392\r
393 // Unrecognised a-line and f-line opcodes throw an exception:\r
394 ot("Op__al%s ;@ Unrecognised a-line opcode\n", ms?"":":");\r
395 ot(" sub r4,r4,#2\n");\r
396#if USE_AFLINE_CALLBACK\r
397 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
398 ot(" mov r1,r9,lsr #28\n");\r
399 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
400 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
401 ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");\r
402 ot(" tst r11,r11\n");\r
403 ot(" movne lr,pc\n");\r
404 ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");\r
405 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
406 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
407 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
408 ot(" mov r9,r9,lsl #28\n");\r
409 ot(" tst r0,r0\n");\r
410 ot(" moveq r0,#0x28\n");\r
411 ot(" bleq Exception\n");\r
412#else\r
413 ot(" mov r0,#0x28\n");\r
414 ot(" bl Exception\n");\r
415#endif\r
416 Cycles=4;\r
417 OpEnd();\r
418\r
419 ot("Op__fl%s ;@ Unrecognised f-line opcode\n", ms?"":":");\r
420 ot(" sub r4,r4,#2\n");\r
421#if USE_AFLINE_CALLBACK\r
422 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
423 ot(" mov r1,r9,lsr #28\n");\r
424 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
425 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
426 ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");\r
427 ot(" tst r11,r11\n");\r
428 ot(" movne lr,pc\n");\r
429 ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");\r
430 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
431 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
432 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
433 ot(" mov r9,r9,lsl #28\n");\r
434 ot(" tst r0,r0\n");\r
435 ot(" moveq r0,#0x2c\n");\r
436 ot(" bleq Exception\n");\r
437#else\r
438 ot(" mov r0,#0x2c\n");\r
439 ot(" bl Exception\n");\r
440#endif\r
441 Cycles=4;\r
442 OpEnd();\r
443\r
444\r
445 for (op=0;op<0x10000;op++)\r
446 {\r
447 if ((op&0xfff)==0) { printf("%x",op>>12); fflush(stdout); } // Update progress\r
448\r
449 OpAny(op);\r
450 }\r
451\r
452 ot("\n");\r
453\r
454 printf("]\n");\r
455}\r
456\r
457// helper\r
458static void ott(const char *str, int par, const char *nl, int nlp, int counter, int size)\r
459{\r
460 switch(size) {\r
461 case 0: if((counter&7)==0) ot(ms?" dcb ":" .byte "); break;\r
462 case 1: if((counter&7)==0) ot(ms?" dcw ":" .hword "); break;\r
463 case 2: if((counter&7)==0) ot(ms?" dcd ":" .long "); break;\r
464 }\r
465 ot(str, par);\r
466 if((counter&7)==7) ot(nl,nlp); else ot(",");\r
467}\r
468\r
469static void PrintJumpTable()\r
470{\r
471 int i=0,op=0,len=0;\r
472\r
473 ot(";@ -------------------------- Jump Table --------------------------\n");\r
474\r
475#if COMPRESS_JUMPTABLE\r
476 int handlers=0,reps=0,*indexes,ip,u,out;\r
477 // use some weird compression on the jump table\r
478 indexes=(int *)malloc(0x10000*4);\r
479 if(!indexes) { printf("ERROR: out of memory\n"); exit(1); }\r
480 len=0x10000;\r
481\r
482 // space for decompressed table\r
483 ot(ms?" area |.data|, data\n":" .data\n .align 4\n\n");\r
484\r
7336a99a 485 ot("CycloneJumpTab%s\n", ms?"":":");\r
cc68a136 486 if(ms) {\r
487 for(i = 0; i < 0xa000/8; i++)\r
488 ot(" dcd 0,0,0,0,0,0,0,0\n");\r
489 } else\r
490 ot(" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", 0xa000/8);\r
491\r
492 // hanlers live in "a-line" part of the table\r
493 // first output nop,a-line,f-line handlers\r
494 ot(ms?" dcd Op____,Op__al,Op__fl,":" .long Op____,Op__al,Op__fl,");\r
495 handlers=3;\r
496\r
497 for(i=0;i<len;i++)\r
498 {\r
499 op=CyJump[i];\r
500\r
501 for(u=i-1; u>=0; u--) if(op == CyJump[u]) break; // already done with this op?\r
502 if(u==-1 && op >= 0) {\r
503 ott("Op%.4x",op," ;@ %.4x\n",i,handlers,2);\r
504 indexes[op] = handlers;\r
505 handlers++;\r
506 }\r
507 }\r
508 if(handlers&7) {\r
509 fseek(AsmFile, -1, SEEK_CUR); // remove last comma\r
510 for(i = 8-(handlers&7); i > 0; i--)\r
511 ot(",000000");\r
512 ot("\n");\r
513 }\r
514 if(ms) {\r
515 for(i = (0x4000-handlers)/8; i > 0; i--)\r
516 ot(" dcd 0,0,0,0,0,0,0,0\n");\r
517 } else {\r
518 ot(ms?"":" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", (0x4000-handlers)/8);\r
519 }\r
520 printf("total distinct hanlers: %i\n",handlers);\r
521 // output data\r
522 for(i=0,ip=0; i < 0xf000; i++, ip++) {\r
523 op=CyJump[i];\r
524 if(op == -2) {\r
525 // it must skip a-line area, because we keep our data there\r
526 ott("0x%.4x", handlers<<4, "\n",0,ip++,1);\r
527 ott("0x%.4x", 0x1000, "\n",0,ip,1);\r
528 i+=0xfff;\r
529 continue;\r
530 }\r
531 for(reps=1; i < 0xf000; i++, reps++) if(op != CyJump[i+1]) break;\r
532 if(op>=0) out=indexes[op]<<4; else out=0; // unrecognised\r
533 if(reps <= 0xe || reps==0x10) {\r
534 if(reps!=0x10) out|=reps; else out|=0xf; // 0xf means 0x10 (0xf appeared to be unused anyway)\r
535 ott("0x%.4x", out, "\n",0,ip,1);\r
536 } else {\r
537 ott("0x%.4x", out, "\n",0,ip++,1);\r
538 ott("0x%.4x", reps,"\n",0,ip,1);\r
539 }\r
540 }\r
541 if(ip&1) ott("0x%.4x", 0, "\n",0,ip++,1);\r
542 if(ip&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma\r
543 ot("\n");\r
544 if(ip&7) {\r
545 for(i = 8-(ip&7); i > 0; i--)\r
546 ot(",0x0000");\r
547 ot("\n");\r
548 }\r
549 if(ms) {\r
550 for(i = (0x2000-ip/2)/8+1; i > 0; i--)\r
551 ot(" dcd 0,0,0,0,0,0,0,0\n");\r
552 } else {\r
553 ot(" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", (0x2000-ip/2)/8+1);\r
554 }\r
555 ot("\n");\r
556 free(indexes);\r
557#else\r
7336a99a 558 ot("CycloneJumpTab%s\n", ms?"":":");\r
cc68a136 559 len=0xfffe; // Hmmm, armasm 2.50.8684 messes up with a 0x10000 long jump table\r
560 // notaz: same thing with GNU as 2.9-psion-98r2 (reloc overflow)\r
561 // this is due to COFF objects using only 2 bytes for reloc count\r
562\r
563 for (i=0;i<len;i++)\r
564 {\r
565 op=CyJump[i];\r
566 \r
567 if(op>=0) ott("Op%.4x",op," ;@ %.4x\n",i-7,i,2);\r
568 else if(op==-2) ott("Op__al",0, " ;@ %.4x\n",i-7,i,2);\r
569 else if(op==-3) ott("Op__fl",0, " ;@ %.4x\n",i-7,i,2);\r
570 else ott("Op____",0, " ;@ %.4x\n",i-7,i,2);\r
571 }\r
572 if(i&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma\r
573\r
574 ot("\n");\r
575 ot(";@ notaz: we don't want to crash if we run into those 2 missing opcodes\n");\r
576 ot(";@ so we leave this pattern to patch it later\n");\r
577 ot("%s 0x78563412\n", ms?" dcd":" .long");\r
578 ot("%s 0x56341290\n", ms?" dcd":" .long");\r
579#endif\r
580}\r
581\r
582static int CycloneMake()\r
583{\r
584 int i;\r
585 char *name="Cyclone.s";\r
586 \r
587 // Open the assembly file\r
588 if (ms) name="Cyclone.asm";\r
589 AsmFile=fopen(name,"wt"); if (AsmFile==NULL) return 1;\r
590 \r
591 printf("Making %s...\n",name);\r
592\r
593 ot("\n;@ Dave's Cyclone 68000 Emulator v%x.%.3x - Assembler Output\n\n",CycloneVer>>12,CycloneVer&0xfff);\r
594\r
595 ot(";@ (c) Copyright 2003 Dave, All rights reserved.\n");\r
596 ot(";@ some code (c) Copyright 2005-2006 notaz, All rights reserved.\n");\r
597 ot(";@ Cyclone 68000 is free for non-commercial use.\n\n");\r
598 ot(";@ For commercial use, separate licencing terms must be obtained.\n\n");\r
599\r
600 CyJump=(int *)malloc(0x40000); if (CyJump==NULL) return 1;\r
601 memset(CyJump,0xff,0x40000); // Init to -1\r
602 for(i=0xa000; i<0xb000; i++) CyJump[i] = -2; // a-line emulation\r
603 for(i=0xf000; i<0x10000; i++) CyJump[i] = -3; // f-line emulation\r
604\r
605 if (ms)\r
606 {\r
607 ot(" area |.text|, code\n");\r
608 ot(" export CycloneInit\n");\r
609 ot(" export CycloneRun\n");\r
610 ot(" export CycloneSetSr\n");\r
611 ot(" export CycloneGetSr\n");\r
612 ot(" export CycloneVer\n");\r
613 ot("\n");\r
614 ot("CycloneVer dcd 0x%.4x\n",CycloneVer);\r
615 }\r
616 else\r
617 {\r
618 ot(" .global CycloneInit\n");\r
619 ot(" .global CycloneRun\n");\r
620 ot(" .global CycloneSetSr\n");\r
621 ot(" .global CycloneGetSr\n");\r
622 ot(" .global CycloneVer\n");\r
7336a99a 623#ifdef CYCLONE_FOR_PICODRIVE\r
624 ot(" .global CycloneDoInterrupt\n");\r
625 ot(" .global CycloneJumpTab\n");\r
626#endif\r
cc68a136 627 ot("CycloneVer: .long 0x%.4x\n",CycloneVer);\r
628 }\r
629 ot("\n");\r
630\r
631 PrintFramework();\r
632 PrintOpcodes();\r
633 PrintJumpTable();\r
634\r
635 if (ms) ot(" END\n");\r
636\r
7336a99a 637 ot("\n\n;@ vim:filetype=armasm\n");\r
638\r
cc68a136 639 fclose(AsmFile); AsmFile=NULL;\r
640\r
641#if 0\r
642 printf("Assembling...\n");\r
643 // Assemble the file\r
644 if (ms) system("armasm Cyclone.asm");\r
645 else system("as -o Cyclone.o Cyclone.s");\r
646 printf("Done!\n\n");\r
647#endif\r
648\r
649 free(CyJump);\r
650 return 0;\r
651}\r
652\r
653int main()\r
654{\r
655 printf("\n Dave's Cyclone 68000 Emulator v%x.%.3x - Core Creator\n\n",CycloneVer>>12,CycloneVer&0xfff);\r
656\r
657 // Make GAS or ARMASM version\r
658 CycloneMake();\r
659 return 0;\r
660}\r
661\r
fast MegaDrive/MegaCD/32X emulator