6003a768 |
1 | \r |
619b1824 |
2 | // This file is part of the Cyclone 68000 Emulator\r |
3 | \r |
c41b9b97 |
4 | // Copyright (c) 2011 FinalDave (emudave (at) gmail.com)\r |
5 | \r |
619b1824 |
6 | // This code is licensed under the GNU General Public License version 2.0 and the MAME License.\r |
7 | // You can choose the license that has the most advantages for you.\r |
8 | \r |
9 | // SVN repository can be found at http://code.google.com/p/cyclone68000/\r |
10 | \r |
6003a768 |
11 | #include "app.h"\r |
12 | \r |
13 | // --------------------- Opcodes 0x0000+ ---------------------\r |
14 | // Emit an Ori/And/Sub/Add/Eor/Cmp Immediate opcode, 0000ttt0 00aaaaaa\r |
15 | int OpArith(int op)\r |
16 | {\r |
17 | int type=0,size=0;\r |
18 | int sea=0,tea=0;\r |
19 | int use=0;\r |
20 | \r |
21 | // Get source and target EA\r |
22 | type=(op>>9)&7; if (type==4 || type>=7) return 1;\r |
23 | size=(op>>6)&3; if (size>=3) return 1;\r |
24 | sea= 0x003c;\r |
25 | tea=op&0x003f;\r |
26 | \r |
27 | // See if we can do this opcode:\r |
28 | if (EaCanRead(tea,size)==0) return 1;\r |
29 | if (type!=6 && EaCanWrite(tea)==0) return 1;\r |
30 | \r |
31 | use=OpBase(op);\r |
32 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
33 | \r |
34 | OpStart(op); Cycles=4;\r |
35 | \r |
36 | EaCalc(10,0x0000, sea,size);\r |
37 | EaRead(10, 10, sea,size,1);\r |
38 | \r |
39 | EaCalc(11,0x003f, tea,size);\r |
40 | EaRead(11, 0, tea,size,1);\r |
41 | \r |
42 | ot(";@ Do arithmetic:\n");\r |
43 | \r |
44 | if (type==0) ot(" orr r1,r0,r10\n");\r |
45 | if (type==1) ot(" and r1,r0,r10\n");\r |
46 | if (type==2) ot(" subs r1,r0,r10 ;@ Defines NZCV\n");\r |
47 | if (type==3) ot(" adds r1,r0,r10 ;@ Defines NZCV\n");\r |
48 | if (type==5) ot(" eor r1,r0,r10\n");\r |
49 | if (type==6) ot(" cmp r0,r10 ;@ Defines NZCV\n");\r |
50 | \r |
51 | if (type<2 || type==5) ot(" adds r1,r1,#0 ;@ Defines NZ, clears CV\n"); // 0,1,5\r |
52 | \r |
53 | if (type< 2) OpGetFlags(0,0); // Ori/And\r |
54 | if (type==2) OpGetFlags(1,1); // Sub: Subtract/X-bit\r |
55 | if (type==3) OpGetFlags(0,1); // Add: X-bit\r |
56 | if (type==5) OpGetFlags(0,0); // Eor\r |
57 | if (type==6) OpGetFlags(1,0); // Cmp: Subtract\r |
58 | ot("\n");\r |
59 | \r |
60 | if (type!=6)\r |
61 | {\r |
62 | EaWrite(11, 1, tea,size,1);\r |
63 | }\r |
64 | \r |
65 | // Correct cycles:\r |
66 | if (type==6)\r |
67 | {\r |
68 | if (size>=2 && tea<0x10) Cycles+=2;\r |
69 | }\r |
70 | else\r |
71 | {\r |
72 | if (size>=2) Cycles+=4;\r |
73 | if (tea>=0x10) Cycles+=4;\r |
74 | if (Amatch && type==1 && size>=2 && tea<0x10) Cycles-=2;\r |
75 | }\r |
76 | \r |
77 | OpEnd();\r |
78 | \r |
79 | return 0;\r |
80 | }\r |
81 | \r |
82 | // --------------------- Opcodes 0x5000+ ---------------------\r |
83 | int OpAddq(int op)\r |
84 | {\r |
85 | // 0101nnnt xxeeeeee (nnn=#8,1-7 t=addq/subq xx=size, eeeeee=EA)\r |
86 | int num=0,type=0,size=0,ea=0;\r |
87 | int use=0;\r |
88 | char count[16]="";\r |
89 | int shift=0;\r |
90 | \r |
91 | num =(op>>9)&7; if (num==0) num=8;\r |
92 | type=(op>>8)&1;\r |
93 | size=(op>>6)&3; if (size>=3) return 1;\r |
94 | ea = op&0x3f;\r |
95 | \r |
96 | // See if we can do this opcode:\r |
97 | if (EaCanRead (ea,size)==0) return 1;\r |
98 | if (EaCanWrite(ea )==0) return 1;\r |
99 | \r |
100 | use=op; if (ea<0x38) use&=~7;\r |
101 | if ((ea&0x38)==0x08) { size=2; use&=~0xc0; } // Every addq #n,An is 32-bit\r |
102 | \r |
103 | if (num!=8) use|=0x0e00; // If num is not 8, use same handler\r |
104 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
105 | \r |
106 | OpStart(op);\r |
107 | Cycles=ea<8?4:8;\r |
108 | if (size>=2 && ea!=8) Cycles+=4;\r |
109 | \r |
110 | EaCalc(10,0x003f, ea,size);\r |
111 | EaRead(10, 0, ea,size,1);\r |
112 | \r |
113 | shift=32-(8<<size);\r |
114 | \r |
115 | if (num!=8)\r |
116 | {\r |
117 | int lsr=9-shift;\r |
118 | \r |
119 | if (lsr>=0) ot(" mov r2,r8,lsr #%d ;@ Get quick value\n", lsr);\r |
120 | else ot(" mov r2,r8,lsl #%d ;@ Get quick value\n",-lsr);\r |
121 | \r |
122 | ot(" and r2,r2,#0x%.4x\n",7<<shift);\r |
123 | ot("\n");\r |
124 | strcpy(count,"r2");\r |
125 | }\r |
126 | \r |
127 | if (num==8) sprintf(count,"#0x%.4x",8<<shift);\r |
128 | \r |
129 | if (type==0) ot(" adds r1,r0,%s\n",count);\r |
130 | if (type==1) ot(" subs r1,r0,%s\n",count);\r |
131 | \r |
132 | if ((ea&0x38)!=0x08) OpGetFlags(type,1);\r |
133 | ot("\n");\r |
134 | \r |
135 | EaWrite(10, 1, ea,size,1);\r |
136 | \r |
137 | OpEnd();\r |
138 | \r |
139 | return 0;\r |
140 | }\r |
141 | \r |
142 | // --------------------- Opcodes 0x8000+ ---------------------\r |
143 | // 1t0tnnnd xxeeeeee (tt=type:or/sub/and/add xx=size, eeeeee=EA)\r |
144 | int OpArithReg(int op)\r |
145 | {\r |
146 | int use=0;\r |
147 | int type=0,size=0,dir=0,rea=0,ea=0;\r |
148 | \r |
149 | type=(op>>12)&5;\r |
150 | rea =(op>> 9)&7;\r |
151 | dir =(op>> 8)&1;\r |
152 | size=(op>> 6)&3; if (size>=3) return 1;\r |
153 | ea = op&0x3f;\r |
154 | \r |
155 | if (dir && ea<0x10) return 1; // addx/subx opcode\r |
156 | \r |
157 | // See if we can do this opcode:\r |
158 | if (dir==0 && EaCanWrite(rea)==0) return 1;\r |
159 | if (dir && EaCanWrite( ea)==0) return 1;\r |
160 | \r |
161 | use=OpBase(op);\r |
162 | use&=~0x0e00; // Use same opcode for Dn\r |
163 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
164 | \r |
165 | OpStart(op); Cycles=4;\r |
166 | \r |
167 | ot(";@ Get r10=EA r11=EA value\n");\r |
168 | EaCalc(10,0x003f, ea,size);\r |
169 | EaRead(10, 11, ea,size,1);\r |
170 | ot(";@ Get r0=Register r1=Register value\n");\r |
171 | EaCalc( 0,0x0e00,rea,size);\r |
172 | EaRead( 0, 1,rea,size,1);\r |
173 | \r |
174 | ot(";@ Do arithmetic:\n");\r |
175 | if (type==0) ot(" orr ");\r |
176 | if (type==1) ot(" subs ");\r |
177 | if (type==4) ot(" and ");\r |
178 | if (type==5) ot(" adds ");\r |
179 | if (dir) ot("r1,r11,r1\n");\r |
180 | else ot("r1,r1,r11\n");\r |
181 | \r |
182 | if ((type&1)==0) ot(" adds r1,r1,#0 ;@ Defines NZ, clears CV\n");\r |
183 | \r |
184 | OpGetFlags(type==1,type&1); // 1==subtract\r |
185 | ot("\n");\r |
186 | \r |
187 | ot(";@ Save result:\n");\r |
188 | if (dir) EaWrite(10, 1, ea,size,1);\r |
189 | else EaWrite( 0, 1,rea,size,1);\r |
190 | \r |
191 | if (size==1 && ea>=0x10) Cycles+=4;\r |
192 | if (size>=2) { if (ea<0x10) Cycles+=4; else Cycles+=2; }\r |
193 | \r |
194 | OpEnd();\r |
195 | \r |
196 | return 0;\r |
197 | }\r |
198 | \r |
199 | // --------------------- Opcodes 0x80c0+ ---------------------\r |
200 | int OpMul(int op)\r |
201 | {\r |
202 | // Div/Mul: 1m00nnns 11eeeeee (m=Mul, nnn=Register Dn, s=signed, eeeeee=EA)\r |
203 | int type=0,rea=0,sign=0,ea=0;\r |
204 | int use=0;\r |
205 | \r |
206 | type=(op>>14)&1; // div/mul\r |
207 | rea =(op>> 9)&7;\r |
208 | sign=(op>> 8)&1;\r |
209 | ea = op&0x3f;\r |
210 | \r |
211 | // See if we can do this opcode:\r |
212 | if (EaCanRead(ea,1)==0) return 1;\r |
213 | \r |
214 | use=OpBase(op);\r |
215 | use&=~0x0e00; // Use same for all registers\r |
216 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
217 | \r |
218 | OpStart(op); Cycles=type?70:133;\r |
219 | \r |
220 | EaCalc(10,0x003f, ea, 1);\r |
221 | EaRead(10, 10, ea, 1);\r |
222 | \r |
223 | EaCalc (0,0x0e00,rea, 2);\r |
224 | EaRead (0, 2,rea, 2);\r |
225 | \r |
226 | if (type==0)\r |
227 | {\r |
228 | ot(" cmp r10,#0\n");\r |
229 | ot(" moveq r10,#1 ;@ Divide by zero\n");\r |
230 | ot("\n");\r |
231 | \r |
232 | if (sign)\r |
233 | {\r |
234 | ot(" mov r11,#0 ;@ r11 = 1 if the result is negative\n");\r |
235 | ot(" eorlt r11,r11,#1\n");\r |
236 | ot(" rsblt r10,r10,#0 ;@ Make r10 positive\n");\r |
237 | ot("\n");\r |
238 | ot(" cmp r2,#0\n");\r |
239 | ot(" eorlt r11,r11,#1\n");\r |
240 | ot(" rsblt r2,r2,#0 ;@ Make r2 positive\n");\r |
241 | ot("\n");\r |
242 | }\r |
243 | \r |
244 | ot(";@ Divide r2 by r10\n");\r |
245 | ot(" mov r3,#0\n");\r |
246 | ot(" mov r1,r10\n");\r |
247 | ot("\n");\r |
248 | ot(";@ Shift up divisor till it's just less than numerator\n");\r |
249 | ot("Shift%.4x%s\n",op,ms?"":":");\r |
250 | ot(" cmp r1,r2,lsr #1\n");\r |
251 | ot(" movls r1,r1,lsl #1\n");\r |
252 | ot(" bcc Shift%.4x\n",op);\r |
253 | ot("\n");\r |
254 | \r |
255 | ot("Divide%.4x%s\n",op,ms?"":":");\r |
256 | ot(" cmp r2,r1\n");\r |
257 | ot(" adc r3,r3,r3 ;@ Double r3 and add 1 if carry set\n");\r |
258 | ot(" subcs r2,r2,r1\n");\r |
259 | ot(" teq r1,r10\n");\r |
260 | ot(" movne r1,r1,lsr #1\n");\r |
261 | ot(" bne Divide%.4x\n",op);\r |
262 | ot("\n");\r |
263 | \r |
264 | if (sign)\r |
265 | {\r |
266 | ot(" tst r11,r11\n");\r |
267 | ot(" rsbne r3,r3,#0 ;@ Negate if result is negative\n");\r |
268 | }\r |
269 | \r |
270 | ot(" mov r11,r2 ;@ Remainder\n");\r |
271 | \r |
272 | ot(" adds r1,r3,#0 ;@ Defines NZ, clears CV\n");\r |
273 | OpGetFlags(0,0);\r |
274 | \r |
275 | ot(" mov r1,r1,lsl #16 ;@ Clip to 16-bits\n");\r |
276 | ot(" mov r1,r1,lsr #16\n");\r |
277 | ot(" orr r1,r1,r11,lsl #16 ;@ Insert remainder\n");\r |
278 | }\r |
279 | \r |
280 | if (type==1)\r |
281 | {\r |
282 | char *shift="asr";\r |
283 | \r |
284 | ot(";@ Get 16-bit signs right:\n");\r |
285 | if (sign==0) { ot(" mov r10,r10,lsl #16\n"); shift="lsr"; }\r |
286 | ot(" mov r2,r2,lsl #16\n");\r |
287 | \r |
288 | if (sign==0) ot(" mov r10,r10,lsr #16\n");\r |
289 | ot(" mov r2,r2,%s #16\n",shift);\r |
290 | ot("\n");\r |
291 | \r |
292 | ot(" mul r1,r2,r10\n");\r |
293 | ot(" adds r1,r1,#0 ;@ Defines NZ, clears CV\n");\r |
294 | OpGetFlags(0,0);\r |
295 | \r |
296 | if (Amatch && ea==0x3c) Cycles-=4;\r |
297 | }\r |
298 | ot("\n");\r |
299 | \r |
300 | EaWrite(0, 1,rea, 2);\r |
301 | \r |
302 | \r |
303 | OpEnd();\r |
304 | \r |
305 | return 0;\r |
306 | }\r |
307 | \r |
308 | // Get X Bit into carry - trashes r2\r |
309 | static int GetXBit(int subtract)\r |
310 | {\r |
311 | ot(";@ Get X bit:\n");\r |
312 | ot(" ldrb r2,[r7,#0x45]\n");\r |
313 | if (subtract) ot(" mvn r2,r2,lsl #28 ;@ Invert it\n");\r |
314 | else ot(" mov r2,r2,lsl #28\n");\r |
315 | ot(" msr cpsr_flg,r2 ;@ Get into Carry\n");\r |
316 | ot("\n");\r |
317 | return 0;\r |
318 | }\r |
319 | \r |
320 | // --------------------- Opcodes 0x8100+ ---------------------\r |
321 | // 1t00ddd1 0000asss - sbcd/abcd Ds,Dd or -(As),-(Ad)\r |
322 | int OpAbcd(int op)\r |
323 | {\r |
324 | int use=0;\r |
325 | int type=0,sea=0,addr=0,dea=0;\r |
326 | \r |
327 | type=(op>>14)&1;\r |
328 | dea =(op>> 9)&7;\r |
329 | addr=(op>> 3)&1;\r |
330 | sea = op &7;\r |
331 | \r |
332 | if (addr) { sea|=0x20; dea|=0x20; }\r |
333 | \r |
334 | use=op&~0x0e07; // Use same opcode for all registers\r |
335 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
336 | \r |
337 | OpStart(op); Cycles=6;\r |
338 | \r |
339 | EaCalc( 0,0x0007, sea,0);\r |
340 | EaRead( 0, 10, sea,0,1);\r |
341 | EaCalc(11,0x0e00, dea,0);\r |
342 | EaRead(11, 1, dea,0,1);\r |
343 | \r |
344 | ot(" ldrb r2,[r7,#0x45] ;@ Get X bit\n");\r |
345 | ot(" tst r2,#2\n");\r |
346 | ot(" addne r10,r10,#0x01000000 ;@ Add carry bit\n");\r |
347 | \r |
348 | if (type)\r |
349 | {\r |
350 | ot(";@ Add units into r2:\n");\r |
351 | ot(" and r2,r1, #0x0f000000\n");\r |
352 | ot(" and r0,r10,#0x0f000000\n");\r |
353 | ot(" add r2,r2,r0\n");\r |
354 | ot(" cmp r2,#0x0a000000\n");\r |
355 | ot(" addpl r1,r1,#0x06000000 ;@ Decimal adjust units\n");\r |
356 | ot(" add r1,r1,r10 ;@ Add BCD\n");\r |
357 | ot(" mov r0,r1,lsr #24\n");\r |
358 | ot(" cmp r0,#0xa0\n");\r |
359 | ot(" addpl r1,r1,#0x60000000 ;@ Decimal adjust tens\n");\r |
360 | OpGetFlags(0,1);\r |
361 | }\r |
362 | else\r |
363 | {\r |
364 | ot(";@ Sub units into r2:\n");\r |
365 | ot(" and r2,r1, #0x0f000000\n");\r |
366 | ot(" and r0,r10,#0x0f000000\n");\r |
367 | ot(" subs r2,r2,r0\n");\r |
368 | ot(" submi r1,r1,#0x06000000 ;@ Decimal adjust units\n");\r |
369 | ot(" subs r1,r1,r10 ;@ Subtract BCD\n");\r |
370 | ot(" submis r1,r1,#0x60000000 ;@ Decimal adjust tens\n");\r |
371 | OpGetFlags(1,1);\r |
372 | }\r |
373 | ot("\n");\r |
374 | \r |
375 | EaWrite(11, 1, dea,0,1);\r |
376 | \r |
377 | OpEnd();\r |
378 | \r |
379 | return 0;\r |
380 | }\r |
381 | \r |
382 | // --------------------- Opcodes 0x90c0+ ---------------------\r |
383 | // Suba/Cmpa/Adda 1tt1nnnx 11eeeeee (tt=type, x=size, eeeeee=Source EA)\r |
384 | int OpAritha(int op)\r |
385 | {\r |
386 | int use=0;\r |
387 | int type=0,size=0,sea=0,dea=0;\r |
388 | \r |
389 | // Suba/Cmpa/Adda/(invalid):\r |
390 | type=(op>>13)&3; if (type>=3) return 1;\r |
391 | \r |
392 | size=(op>>8)&1; size++;\r |
393 | dea=(op>>9)&7; dea|=8; // Dest=An\r |
394 | sea=op&0x003f; // Source\r |
395 | \r |
396 | // See if we can do this opcode:\r |
397 | if (EaCanRead(sea,size)==0) return 1;\r |
398 | \r |
399 | use=OpBase(op);\r |
400 | use&=~0x0e00; // Use same opcode for An\r |
401 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
402 | \r |
403 | OpStart(op); Cycles=4;\r |
404 | EaCalc ( 0,0x003f, sea,size);\r |
405 | EaRead ( 0, 10, sea,size);\r |
406 | \r |
407 | EaCalc ( 0,0x0e00, dea,2);\r |
408 | EaRead ( 0, 1, dea,2);\r |
409 | \r |
410 | if (type==0) ot(" sub r1,r1,r10\n");\r |
411 | if (type==1) ot(" cmp r1,r10 ;@ Defines NZCV\n");\r |
412 | if (type==1) OpGetFlags(1,0); // Get Cmp flags\r |
413 | if (type==2) ot(" add r1,r1,r10\n");\r |
414 | ot("\n");\r |
415 | \r |
416 | EaWrite( 0, 1, dea,2);\r |
417 | \r |
418 | if (Amatch && sea==0x3c) Cycles-=size<2?4:8; // Correct?\r |
419 | if (size>=2) { if (sea<0x10) Cycles+=4; else Cycles+=2; }\r |
420 | \r |
421 | OpEnd();\r |
422 | \r |
423 | return 0;\r |
424 | }\r |
425 | \r |
426 | // --------------------- Opcodes 0x9100+ ---------------------\r |
427 | // Emit a Subx/Addx opcode, 1t01ddd1 zz000sss addx.z Ds,Dd\r |
428 | int OpAddx(int op)\r |
429 | {\r |
430 | int use=0;\r |
431 | int type=0,size=0,dea=0,sea=0;\r |
432 | \r |
433 | type=(op>>12)&5;\r |
434 | dea =(op>> 9)&7;\r |
435 | size=(op>> 6)&3; if (size>=3) return 1;\r |
436 | sea = op&0x3f;\r |
437 | \r |
438 | // See if we can do this opcode:\r |
439 | if (EaCanRead(sea,size)==0) return 1;\r |
440 | if (EaCanWrite(dea)==0) return 1;\r |
441 | \r |
442 | use=OpBase(op);\r |
443 | use&=~0x0e00; // Use same opcode for Dn\r |
444 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
445 | \r |
446 | OpStart(op); Cycles=8;\r |
447 | \r |
448 | ot(";@ Get r10=EA r11=EA value\n");\r |
449 | EaCalc( 0,0x003f,sea,size);\r |
450 | EaRead( 0, 11,sea,size,1);\r |
451 | ot(";@ Get r0=Register r1=Register value\n");\r |
452 | EaCalc( 0,0x0e00,dea,size);\r |
453 | EaRead( 0, 1,dea,size,1);\r |
454 | \r |
455 | ot(";@ Do arithmetic:\n");\r |
456 | GetXBit(type==1);\r |
457 | \r |
458 | if (type==5 && size<2)\r |
459 | {\r |
460 | ot(";@ Make sure the carry bit will tip the balance:\n");\r |
461 | if (size==0) ot(" ldr r2,=0x00ffffff\n");\r |
462 | else ot(" ldr r2,=0x0000ffff\n");\r |
463 | ot(" orr r11,r11,r2\n");\r |
464 | ot("\n");\r |
465 | }\r |
466 | \r |
467 | if (type==1) ot(" sbcs r1,r1,r11\n");\r |
468 | if (type==5) ot(" adcs r1,r1,r11\n");\r |
469 | OpGetFlags(type==1,1); // subtract\r |
470 | ot("\n");\r |
471 | \r |
472 | ot(";@ Save result:\n");\r |
473 | EaWrite( 0, 1, dea,size,1);\r |
474 | \r |
475 | OpEnd();\r |
476 | \r |
477 | return 0;\r |
478 | }\r |
479 | \r |
480 | // --------------------- Opcodes 0xb000+ ---------------------\r |
481 | // Emit a Cmp/Eor opcode, 1011rrrt xxeeeeee (rrr=Dn, t=cmp/eor, xx=size extension, eeeeee=ea)\r |
482 | int OpCmpEor(int op)\r |
483 | {\r |
484 | int rea=0,eor=0;\r |
485 | int size=0,ea=0,use=0;\r |
486 | \r |
487 | // Get EA and register EA\r |
488 | rea=(op>>9)&7;\r |
489 | eor=(op>>8)&1;\r |
490 | size=(op>>6)&3; if (size>=3) return 1;\r |
491 | ea=op&0x3f;\r |
492 | \r |
493 | // See if we can do this opcode:\r |
494 | if (EaCanRead(ea,size)==0) return 1;\r |
495 | if (eor && EaCanWrite(ea)==0) return 1;\r |
496 | \r |
497 | use=OpBase(op);\r |
498 | use&=~0x0e00; // Use 1 handler for register d0-7\r |
499 | if (op!=use) { OpUse(op,use); return 0; } // Use existing handler\r |
500 | \r |
501 | OpStart(op); Cycles=eor?8:4;\r |
502 | \r |
503 | ot(";@ Get EA into r10 and value into r0:\n");\r |
504 | EaCalc (10,0x003f, ea,size);\r |
505 | EaRead (10, 0, ea,size,1);\r |
506 | \r |
507 | ot(";@ Get register operand into r1:\n");\r |
508 | EaCalc (1 ,0x0e00, rea,size);\r |
509 | EaRead (1, 1, rea,size,1);\r |
510 | \r |
511 | ot(";@ Do arithmetic:\n");\r |
512 | if (eor==0) ot(" cmp r1,r0\n");\r |
513 | if (eor)\r |
514 | {\r |
515 | ot(" eor r1,r0,r1\n");\r |
516 | ot(" adds r1,r1,#0 ;@ Defines NZ, clears CV\n");\r |
517 | }\r |
518 | \r |
519 | OpGetFlags(eor==0,0); // Cmp like subtract\r |
520 | ot("\n");\r |
521 | \r |
522 | if (size>=2) Cycles+=4; // Correct?\r |
523 | if (ea==0x3c) Cycles-=4;\r |
524 | \r |
525 | if (eor) EaWrite(10, 1,ea,size,1);\r |
526 | \r |
527 | OpEnd();\r |
528 | return 0;\r |
529 | }\r |
530 | \r |