notaz.gp2x.de / picodrive.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
initial import
[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
96 ot(" blgt DoInterrupt\n");\r
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
112 ot(" ldr r6,=JumpTab ;@ r6 = Opcode Jump table\n");\r
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
127 ot(" blgt DoInterrupt\n");\r
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
146 ot(" mov r9,r9,lsr #28\n");\r
147 ot(" str r4,[r7,#0x40] ;@ Save Current PC + Memory Base\n");\r
148 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
149 ot(" strb r9,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
150 ot(" ldmia sp!,{r4-r11,pc}\n");\r
151 ot("\n");\r
152 ot("CycloneStopped%s\n", ms?"":":");\r
153 ot(" mov r5,#0\n");\r
154 ot(" str r5,[r7,#0x5C] ;@ eat all cycles\n");\r
155 ot(" ldmia sp!,{r4-r11,pc} ;@ we are stopped, do nothing!\n");\r
156 ot("\n");\r
157\r
158 ltorg();\r
159\r
160#if COMPRESS_JUMPTABLE\r
161 ot(";@ uncompress jump table\n");\r
162 if (ms) ot("CycloneInit\n");\r
163 else ot("CycloneInit:\n");\r
164 ot(" ldr r12,=JumpTab\n");\r
165 ot(" add r0,r12,#0xe000*4 ;@ ctrl code pointer\n");\r
166 ot(" ldr r1,[r0,#-4]\n");\r
167 ot(" tst r1,r1\n");\r
168 ot(" movne pc,lr ;@ already uncompressed\n");\r
169 ot(" add r3,r12,#0xa000*4 ;@ handler table pointer, r12=dest\n");\r
170 ot("unc_loop%s\n", ms?"":":");\r
171 ot(" ldrh r1,[r0],#2\n");\r
172 ot(" and r2,r1,#0xf\n");\r
173 ot(" bic r1,r1,#0xf\n");\r
174 ot(" ldr r1,[r3,r1,lsr #2] ;@ r1=handler\n");\r
175 ot(" cmp r2,#0xf\n");\r
176 ot(" addeq r2,r2,#1 ;@ 0xf is really 0x10\n");\r
177 ot(" tst r2,r2\n");\r
178 ot(" ldreqh r2,[r0],#2 ;@ counter is in next word\n");\r
179 ot(" tst r2,r2\n");\r
180 ot(" beq unc_finish ;@ done decompressing\n");\r
181 ot(" tst r1,r1\n");\r
182 ot(" addeq r12,r12,r2,lsl #2 ;@ 0 handler means we should skip those bytes\n");\r
183 ot(" beq unc_loop\n");\r
184 ot("unc_loop_in%s\n", ms?"":":");\r
185 ot(" subs r2,r2,#1\n");\r
186 ot(" str r1,[r12],#4\n");\r
187 ot(" bgt unc_loop_in\n");\r
188 ot(" b unc_loop\n");\r
189 ot("unc_finish%s\n", ms?"":":");\r
190 ot(" ldr r12,=JumpTab\n");\r
191 ot(" ;@ set a-line and f-line handlers\n");\r
192 ot(" add r0,r12,#0xa000*4\n");\r
193 ot(" ldr r1,[r0,#4] ;@ a-line handler\n");\r
194 ot(" ldr r3,[r0,#8] ;@ f-line handler\n");\r
195 ot(" mov r2,#0x1000\n");\r
196 ot("unc_fill3%s\n", ms?"":":");\r
197 ot(" subs r2,r2,#1\n");\r
198 ot(" str r1,[r0],#4\n");\r
199 ot(" bgt unc_fill3\n");\r
200 ot(" add r0,r12,#0xf000*4\n");\r
201 ot(" mov r2,#0x1000\n");\r
202 ot("unc_fill4%s\n", ms?"":":");\r
203 ot(" subs r2,r2,#1\n");\r
204 ot(" str r3,[r0],#4\n");\r
205 ot(" bgt unc_fill4\n");\r
206 ot(" bx lr\n");\r
207 ltorg();\r
208 ot("\n");\r
209#else\r
210 ot(";@ do nothing\n");\r
211 if (ms) ot("CycloneInit\n");\r
212 else ot("CycloneInit:\n");\r
213 ot(" bx lr\n");\r
214 ot("\n");\r
215#endif\r
216 if (ms) ot("CycloneSetSr\n");\r
217 else ot("CycloneSetSr:\n");\r
218 ot(" mov r2,r1,lsr #8\n");\r
219 ot(" ldrb r3,[r0,#0x44] ;@ get SR high\n");\r
220 ot(" eor r3,r3,r2\n");\r
221 ot(" tst r3,#0x20\n");\r
222 ot(" and r2,r2,#0xa7 ;@ only nonzero bits\n");\r
223 ot(" strb r2,[r0,#0x44] ;@ set SR high\n");\r
224 ot(" bne setsr_noswap\n");\r
225 ot(" ldr r2,[r0,#0x3C] ;@ Get A7\n");\r
226 ot(" ldr r3,[r0,#0x48] ;@ Get OSP\n");\r
227 ot(" str r3,[r0,#0x3C]\n");\r
228 ot(" str r2,[r0,#0x48]\n");\r
229 ot("setsr_noswap%s\n",ms?"":":");\r
230 ot(" mov r2,r1,lsr #3\n");\r
231 ot(" strb r2,[r0,#0x45] ;@ the X flag\n");\r
232 ot(" bic r2,r1,#0xf3\n");\r
233 ot(" tst r1,#1\n");\r
234 ot(" orrne r2,r2,#2\n");\r
235 ot(" tst r1,#2\n");\r
236 ot(" orrne r2,r2,#1\n");\r
237 ot(" strb r2,[r0,#0x46] ;@ flags\n");\r
238 ot(" bx lr\n");\r
239 ot("\n");\r
240\r
241 if (ms) ot("CycloneGetSr\n");\r
242 else ot("CycloneGetSr:\n");\r
243 ot(" ldrb r1,[r0,#0x46] ;@ flags\n");\r
244 ot(" bic r2,r1,#0xf3\n");\r
245 ot(" tst r1,#1\n");\r
246 ot(" orrne r2,r2,#2\n");\r
247 ot(" tst r1,#2\n");\r
248 ot(" orrne r2,r2,#1\n");\r
249 ot(" ldrb r1,[r0,#0x45] ;@ the X flag\n");\r
250 ot(" tst r1,#2\n");\r
251 ot(" orrne r2,r2,#0x10\n");\r
252 ot(" ldrb r1,[r0,#0x44] ;@ the SR high\n");\r
253 ot(" orr r0,r2,r1,lsl #8\n");\r
254 ot(" bx lr\n");\r
255 ot("\n");\r
256\r
257 ot(";@ DoInterrupt - r0=IRQ number\n");\r
258 ot("DoInterrupt%s\n", ms?"":":");\r
259 ot(" stmdb sp!,{lr} ;@ Push ARM return address\n");\r
260\r
261 ot(";@ Get IRQ Vector address:\n");\r
262 ot(" mov r0,r0,asl #2\n");\r
263 ot(" add r11,r0,#0x60\n");\r
264 PrintException(1);\r
265 \r
266 ot(" ldrb r0,[r7,#0x47] ;@ IRQ\n");\r
267 ot(" mov r2,#0\n");\r
268 ot(" orr r1,r0,#0x20 ;@ Supervisor mode + IRQ number\n");\r
269 ot(" strb r1,[r7,#0x44] ;@ Put SR high\n");\r
270\r
271 ot(";@ Clear stopped states:\n");\r
272 ot(" str r2,[r7,#0x58]\n");\r
273 ot(" sub r5,r5,#%d ;@ Subtract cycles\n",44);\r
274 ot("\n");\r
275#if USE_INT_ACK_CALLBACK\r
276#if INT_ACK_NEEDS_STUFF\r
277 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
278 ot(" mov r1,r9,lsr #28\n");\r
279 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
280 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
281#endif\r
282 ot(" ldr r11,[r7,#0x8c] ;@ IrqCallback\n");\r
283 ot(" tst r11,r11\n");\r
284 ot(" movne lr,pc\n");\r
285 ot(" movne pc,r11 ;@ call IrqCallback if it is defined\n");\r
286#if INT_ACK_CHANGES_STUFF\r
287 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
288 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
289 ot(" mov r9,r9,lsl #28\n");\r
290 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
291#endif\r
292#else // not USE_INT_ACK_CALLBACK\r
293 ot(";@ Clear irq:\n");\r
294 ot(" strb r1,[r7,#0x47]\n");\r
295#endif\r
296 ot(" ldmia sp!,{pc} ;@ Return\n");\r
297 ot("\n");\r
298 \r
299 ot("Exception%s\n", ms?"":":");\r
300 ot("\n");\r
301 ot(" stmdb sp!,{lr} ;@ Preserve ARM return address\n");\r
302 PrintException(0);\r
303 ot(" ldmia sp!,{pc} ;@ Return\n");\r
304 ot("\n");\r
305}\r
306\r
307// ---------------------------------------------------------------------------\r
308// Call Read(r0), Write(r0,r1) or Fetch(r0)\r
309// Trashes r0-r3,r12,lr\r
310int MemHandler(int type,int size)\r
311{\r
312 int func=0;\r
313 func=0x68+type*0xc+(size<<2); // Find correct offset\r
314\r
315#if MEMHANDLERS_NEED_PC\r
316 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
317#endif\r
318#if MEMHANDLERS_NEED_FLAGS\r
319 ot(" mov r3,r9,lsr #28\n");\r
320 ot(" strb r3,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
321#endif\r
322#if MEMHANDLERS_NEED_CYCLES\r
323 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
324#endif\r
325\r
326 ot(" mov lr,pc\n");\r
327 ot(" ldr pc,[r7,#0x%x] ;@ Call ",func);\r
328\r
329 // Document what we are calling:\r
330 if (type==0) ot("read");\r
331 if (type==1) ot("write");\r
332 if (type==2) ot("fetch");\r
333\r
334 if (type==1) ot("%d(r0,r1)",8<<size);\r
335 else ot("%d(r0)", 8<<size);\r
336 ot(" handler\n");\r
337\r
338#if MEMHANDLERS_CHANGE_CYCLES\r
339 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
340#endif\r
341#if MEMHANDLERS_CHANGE_FLAGS\r
342 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
343 ot(" mov r9,r9,lsl #28\n");\r
344#endif\r
345#if MEMHANDLERS_CHANGE_PC\r
346 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
347#endif\r
348\r
349 return 0;\r
350}\r
351\r
352static void PrintOpcodes()\r
353{\r
354 int op=0;\r
355 \r
356 printf("Creating Opcodes: [");\r
357\r
358 ot(";@ ---------------------------- Opcodes ---------------------------\n");\r
359\r
360 // Emit null opcode:\r
361 ot("Op____%s ;@ Called if an opcode is not recognised\n", ms?"":":");\r
362 ot(" sub r4,r4,#2\n");\r
363#if USE_UNRECOGNIZED_CALLBACK\r
364 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
365 ot(" mov r1,r9,lsr #28\n");\r
366 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
367 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
368 ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");\r
369 ot(" tst r11,r11\n");\r
370 ot(" movne lr,pc\n");\r
371 ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");\r
372 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
373 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
374 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
375 ot(" mov r9,r9,lsl #28\n");\r
376 ot(" tst r0,r0\n");\r
377 ot(" moveq r0,#0x10\n");\r
378 ot(" bleq Exception\n");\r
379#else\r
380 ot(" mov r0,#0x10\n");\r
381 ot(" bl Exception\n");\r
382#endif\r
383 Cycles=34;\r
384 OpEnd();\r
385\r
386 // Unrecognised a-line and f-line opcodes throw an exception:\r
387 ot("Op__al%s ;@ Unrecognised a-line opcode\n", ms?"":":");\r
388 ot(" sub r4,r4,#2\n");\r
389#if USE_AFLINE_CALLBACK\r
390 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
391 ot(" mov r1,r9,lsr #28\n");\r
392 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
393 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
394 ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");\r
395 ot(" tst r11,r11\n");\r
396 ot(" movne lr,pc\n");\r
397 ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");\r
398 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
399 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
400 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
401 ot(" mov r9,r9,lsl #28\n");\r
402 ot(" tst r0,r0\n");\r
403 ot(" moveq r0,#0x28\n");\r
404 ot(" bleq Exception\n");\r
405#else\r
406 ot(" mov r0,#0x28\n");\r
407 ot(" bl Exception\n");\r
408#endif\r
409 Cycles=4;\r
410 OpEnd();\r
411\r
412 ot("Op__fl%s ;@ Unrecognised f-line opcode\n", ms?"":":");\r
413 ot(" sub r4,r4,#2\n");\r
414#if USE_AFLINE_CALLBACK\r
415 ot(" str r4,[r7,#0x40] ;@ Save PC\n");\r
416 ot(" mov r1,r9,lsr #28\n");\r
417 ot(" strb r1,[r7,#0x46] ;@ Save Flags (NZCV)\n");\r
418 ot(" str r5,[r7,#0x5c] ;@ Save Cycles\n");\r
419 ot(" ldr r11,[r7,#0x94] ;@ UnrecognizedCallback\n");\r
420 ot(" tst r11,r11\n");\r
421 ot(" movne lr,pc\n");\r
422 ot(" movne pc,r11 ;@ call UnrecognizedCallback if it is defined\n");\r
423 ot(" ldrb r9,[r7,#0x46] ;@ r9 = Load Flags (NZCV)\n");\r
424 ot(" ldr r5,[r7,#0x5c] ;@ Load Cycles\n");\r
425 ot(" ldr r4,[r7,#0x40] ;@ Load PC\n");\r
426 ot(" mov r9,r9,lsl #28\n");\r
427 ot(" tst r0,r0\n");\r
428 ot(" moveq r0,#0x2c\n");\r
429 ot(" bleq Exception\n");\r
430#else\r
431 ot(" mov r0,#0x2c\n");\r
432 ot(" bl Exception\n");\r
433#endif\r
434 Cycles=4;\r
435 OpEnd();\r
436\r
437\r
438 for (op=0;op<0x10000;op++)\r
439 {\r
440 if ((op&0xfff)==0) { printf("%x",op>>12); fflush(stdout); } // Update progress\r
441\r
442 OpAny(op);\r
443 }\r
444\r
445 ot("\n");\r
446\r
447 printf("]\n");\r
448}\r
449\r
450// helper\r
451static void ott(const char *str, int par, const char *nl, int nlp, int counter, int size)\r
452{\r
453 switch(size) {\r
454 case 0: if((counter&7)==0) ot(ms?" dcb ":" .byte "); break;\r
455 case 1: if((counter&7)==0) ot(ms?" dcw ":" .hword "); break;\r
456 case 2: if((counter&7)==0) ot(ms?" dcd ":" .long "); break;\r
457 }\r
458 ot(str, par);\r
459 if((counter&7)==7) ot(nl,nlp); else ot(",");\r
460}\r
461\r
462static void PrintJumpTable()\r
463{\r
464 int i=0,op=0,len=0;\r
465\r
466 ot(";@ -------------------------- Jump Table --------------------------\n");\r
467\r
468#if COMPRESS_JUMPTABLE\r
469 int handlers=0,reps=0,*indexes,ip,u,out;\r
470 // use some weird compression on the jump table\r
471 indexes=(int *)malloc(0x10000*4);\r
472 if(!indexes) { printf("ERROR: out of memory\n"); exit(1); }\r
473 len=0x10000;\r
474\r
475 // space for decompressed table\r
476 ot(ms?" area |.data|, data\n":" .data\n .align 4\n\n");\r
477\r
478 ot("JumpTab%s\n", ms?"":":");\r
479 if(ms) {\r
480 for(i = 0; i < 0xa000/8; i++)\r
481 ot(" dcd 0,0,0,0,0,0,0,0\n");\r
482 } else\r
483 ot(" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", 0xa000/8);\r
484\r
485 // hanlers live in "a-line" part of the table\r
486 // first output nop,a-line,f-line handlers\r
487 ot(ms?" dcd Op____,Op__al,Op__fl,":" .long Op____,Op__al,Op__fl,");\r
488 handlers=3;\r
489\r
490 for(i=0;i<len;i++)\r
491 {\r
492 op=CyJump[i];\r
493\r
494 for(u=i-1; u>=0; u--) if(op == CyJump[u]) break; // already done with this op?\r
495 if(u==-1 && op >= 0) {\r
496 ott("Op%.4x",op," ;@ %.4x\n",i,handlers,2);\r
497 indexes[op] = handlers;\r
498 handlers++;\r
499 }\r
500 }\r
501 if(handlers&7) {\r
502 fseek(AsmFile, -1, SEEK_CUR); // remove last comma\r
503 for(i = 8-(handlers&7); i > 0; i--)\r
504 ot(",000000");\r
505 ot("\n");\r
506 }\r
507 if(ms) {\r
508 for(i = (0x4000-handlers)/8; i > 0; i--)\r
509 ot(" dcd 0,0,0,0,0,0,0,0\n");\r
510 } else {\r
511 ot(ms?"":" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", (0x4000-handlers)/8);\r
512 }\r
513 printf("total distinct hanlers: %i\n",handlers);\r
514 // output data\r
515 for(i=0,ip=0; i < 0xf000; i++, ip++) {\r
516 op=CyJump[i];\r
517 if(op == -2) {\r
518 // it must skip a-line area, because we keep our data there\r
519 ott("0x%.4x", handlers<<4, "\n",0,ip++,1);\r
520 ott("0x%.4x", 0x1000, "\n",0,ip,1);\r
521 i+=0xfff;\r
522 continue;\r
523 }\r
524 for(reps=1; i < 0xf000; i++, reps++) if(op != CyJump[i+1]) break;\r
525 if(op>=0) out=indexes[op]<<4; else out=0; // unrecognised\r
526 if(reps <= 0xe || reps==0x10) {\r
527 if(reps!=0x10) out|=reps; else out|=0xf; // 0xf means 0x10 (0xf appeared to be unused anyway)\r
528 ott("0x%.4x", out, "\n",0,ip,1);\r
529 } else {\r
530 ott("0x%.4x", out, "\n",0,ip++,1);\r
531 ott("0x%.4x", reps,"\n",0,ip,1);\r
532 }\r
533 }\r
534 if(ip&1) ott("0x%.4x", 0, "\n",0,ip++,1);\r
535 if(ip&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma\r
536 ot("\n");\r
537 if(ip&7) {\r
538 for(i = 8-(ip&7); i > 0; i--)\r
539 ot(",0x0000");\r
540 ot("\n");\r
541 }\r
542 if(ms) {\r
543 for(i = (0x2000-ip/2)/8+1; i > 0; i--)\r
544 ot(" dcd 0,0,0,0,0,0,0,0\n");\r
545 } else {\r
546 ot(" .rept 0x%x\n .long 0,0,0,0,0,0,0,0\n .endr\n", (0x2000-ip/2)/8+1);\r
547 }\r
548 ot("\n");\r
549 free(indexes);\r
550#else\r
551 ot("JumpTab%s\n", ms?"":":");\r
552 len=0xfffe; // Hmmm, armasm 2.50.8684 messes up with a 0x10000 long jump table\r
553 // notaz: same thing with GNU as 2.9-psion-98r2 (reloc overflow)\r
554 // this is due to COFF objects using only 2 bytes for reloc count\r
555\r
556 for (i=0;i<len;i++)\r
557 {\r
558 op=CyJump[i];\r
559 \r
560 if(op>=0) ott("Op%.4x",op," ;@ %.4x\n",i-7,i,2);\r
561 else if(op==-2) ott("Op__al",0, " ;@ %.4x\n",i-7,i,2);\r
562 else if(op==-3) ott("Op__fl",0, " ;@ %.4x\n",i-7,i,2);\r
563 else ott("Op____",0, " ;@ %.4x\n",i-7,i,2);\r
564 }\r
565 if(i&7) fseek(AsmFile, -1, SEEK_CUR); // remove last comma\r
566\r
567 ot("\n");\r
568 ot(";@ notaz: we don't want to crash if we run into those 2 missing opcodes\n");\r
569 ot(";@ so we leave this pattern to patch it later\n");\r
570 ot("%s 0x78563412\n", ms?" dcd":" .long");\r
571 ot("%s 0x56341290\n", ms?" dcd":" .long");\r
572#endif\r
573}\r
574\r
575static int CycloneMake()\r
576{\r
577 int i;\r
578 char *name="Cyclone.s";\r
579 \r
580 // Open the assembly file\r
581 if (ms) name="Cyclone.asm";\r
582 AsmFile=fopen(name,"wt"); if (AsmFile==NULL) return 1;\r
583 \r
584 printf("Making %s...\n",name);\r
585\r
586 ot("\n;@ Dave's Cyclone 68000 Emulator v%x.%.3x - Assembler Output\n\n",CycloneVer>>12,CycloneVer&0xfff);\r
587\r
588 ot(";@ (c) Copyright 2003 Dave, All rights reserved.\n");\r
589 ot(";@ some code (c) Copyright 2005-2006 notaz, All rights reserved.\n");\r
590 ot(";@ Cyclone 68000 is free for non-commercial use.\n\n");\r
591 ot(";@ For commercial use, separate licencing terms must be obtained.\n\n");\r
592\r
593 CyJump=(int *)malloc(0x40000); if (CyJump==NULL) return 1;\r
594 memset(CyJump,0xff,0x40000); // Init to -1\r
595 for(i=0xa000; i<0xb000; i++) CyJump[i] = -2; // a-line emulation\r
596 for(i=0xf000; i<0x10000; i++) CyJump[i] = -3; // f-line emulation\r
597\r
598 if (ms)\r
599 {\r
600 ot(" area |.text|, code\n");\r
601 ot(" export CycloneInit\n");\r
602 ot(" export CycloneRun\n");\r
603 ot(" export CycloneSetSr\n");\r
604 ot(" export CycloneGetSr\n");\r
605 ot(" export CycloneVer\n");\r
606 ot("\n");\r
607 ot("CycloneVer dcd 0x%.4x\n",CycloneVer);\r
608 }\r
609 else\r
610 {\r
611 ot(" .global CycloneInit\n");\r
612 ot(" .global CycloneRun\n");\r
613 ot(" .global CycloneSetSr\n");\r
614 ot(" .global CycloneGetSr\n");\r
615 ot(" .global CycloneVer\n");\r
616 ot("CycloneVer: .long 0x%.4x\n",CycloneVer);\r
617 }\r
618 ot("\n");\r
619\r
620 PrintFramework();\r
621 PrintOpcodes();\r
622 PrintJumpTable();\r
623\r
624 if (ms) ot(" END\n");\r
625\r
626 fclose(AsmFile); AsmFile=NULL;\r
627\r
628#if 0\r
629 printf("Assembling...\n");\r
630 // Assemble the file\r
631 if (ms) system("armasm Cyclone.asm");\r
632 else system("as -o Cyclone.o Cyclone.s");\r
633 printf("Done!\n\n");\r
634#endif\r
635\r
636 free(CyJump);\r
637 return 0;\r
638}\r
639\r
640int main()\r
641{\r
642 printf("\n Dave's Cyclone 68000 Emulator v%x.%.3x - Core Creator\n\n",CycloneVer>>12,CycloneVer&0xfff);\r
643\r
644 // Make GAS or ARMASM version\r
645 CycloneMake();\r
646 return 0;\r
647}\r
648\r
fast MegaDrive/MegaCD/32X emulator