1:
2: \ bernd thallner 9725890 e881
3: \ disassembler in forth for alpha
4:
5: \ util
6:
7: : h@ ( addr -- n ) \ 32 bit fetch
8: dup dup aligned = if
9: @
10: $00000000ffffffff and
11: else
12: 4 - @
13: $20 rshift
14: endif
15: ;
16:
17: create string_table
18: 1000 allot
19:
20: \ makes an table entry with following data structure
21: \ 64 start address in string_table 48 strlen 32 format (cOpc, cBra, cF-P, cMem, cMfc, cMbr, cOpr, cPcd) 0
22:
23: : mktbentry, { start format straddr strlen -- start } \ make table entry
24: straddr string_table start + strlen cmove
25: start 48 lshift
26: strlen 32 lshift or
27: format or
28: ,
29: start strlen +
30: ;
31:
32: \ prints the string from stringtable
33: \ table_entry = 64 start address in string_table 48 strlen 32 unused 0
34:
35: : print_string ( table_entry -- ) \ print string entry
36: dup
37: 48 rshift string_table +
38: swap
39: 32 rshift $000000000000ffff and
40: type
41: ;
42:
43: \ Opr tab0 opcode 10.xxx
44: \ Opr tab1 opcode 11.xxx
45: \ Opr tab2 opcode 12.xxx
46: \ Opr tab3 opcode 13.xxx
47:
48: \ F-P tab0 opcode 15.xxx
49: \ F-P tab1 opcode 16.xxx
50: \ F-P tab2 opcode 17.xxx
51:
52: : tab0 2* 2* ;
53: : tab1 2* 2* 1 + ;
54: : tab2 2* 2* 2 + ;
55: : tab3 2* 2* 3 + ;
56:
57: 0 \ string_table offset
58:
59: create Opr_list
60:
61: $00 tab0 s" addl" mktbentry,
62: $40 tab0 s" addlv" mktbentry,
63: $20 tab0 s" addq" mktbentry,
64: $60 tab0 s" addqv" mktbentry,
65: $0f tab0 s" cmpbge" mktbentry,
66: $2d tab0 s" cmpeq" mktbentry,
67: $6d tab0 s" cmple" mktbentry,
68: $4d tab0 s" cmplt" mktbentry,
69: $3d tab0 s" cmpule" mktbentry,
70: $1d tab0 s" cmpult" mktbentry,
71: $02 tab0 s" s4addl" mktbentry,
72: $22 tab0 s" s4addq" mktbentry,
73: $0b tab0 s" s4subl" mktbentry,
74: $2b tab0 s" s4subq" mktbentry,
75: $12 tab0 s" s8addl" mktbentry,
76: $32 tab0 s" s8addq" mktbentry,
77: $1b tab0 s" s8ubl" mktbentry,
78: $3b tab0 s" s8ubq" mktbentry,
79: $09 tab0 s" subl" mktbentry,
80: $49 tab0 s" sublv" mktbentry,
81: $29 tab0 s" subq" mktbentry,
82: $69 tab0 s" subqv" mktbentry,
83:
84: $00 tab1 s" and" mktbentry,
85: $08 tab1 s" bic" mktbentry,
86: $20 tab1 s" bis" mktbentry,
87: $24 tab1 s" cmoveq" mktbentry,
88: $46 tab1 s" cmovge" mktbentry,
89: $66 tab1 s" cmovgt" mktbentry,
90: $16 tab1 s" cmovlbc" mktbentry,
91: $14 tab1 s" cmovlbs" mktbentry,
92: $64 tab1 s" cmovle" mktbentry,
93: $44 tab1 s" cmovlt" mktbentry,
94: $26 tab1 s" cmovne" mktbentry,
95: $48 tab1 s" eqv" mktbentry,
96: $28 tab1 s" ornot" mktbentry,
97: $40 tab1 s" xor" mktbentry,
98:
99: $06 tab2 s" extbl" mktbentry,
100: $6a tab2 s" extlh" mktbentry,
101: $26 tab2 s" extll" mktbentry,
102: $7a tab2 s" extqh" mktbentry,
103: $36 tab2 s" extql" mktbentry,
104: $5a tab2 s" extwh" mktbentry,
105: $16 tab2 s" extwl" mktbentry,
106: $0b tab2 s" insbl" mktbentry,
107: $67 tab2 s" inslh" mktbentry,
108: $2b tab2 s" insll" mktbentry,
109: $77 tab2 s" insqh" mktbentry,
110: $3b tab2 s" insql" mktbentry,
111: $57 tab2 s" inswh" mktbentry,
112: $1b tab2 s" inswl" mktbentry,
113: $02 tab2 s" mskbl" mktbentry,
114: $62 tab2 s" msklh" mktbentry,
115: $22 tab2 s" mskll" mktbentry,
116: $72 tab2 s" mskqh" mktbentry,
117: $32 tab2 s" mskql" mktbentry,
118: $52 tab2 s" mskwh" mktbentry,
119: $12 tab2 s" mskwl" mktbentry,
120: $39 tab2 s" sll" mktbentry,
121: $3c tab2 s" sra" mktbentry,
122: $34 tab2 s" srl" mktbentry,
123: $30 tab2 s" zap" mktbentry,
124: $31 tab2 s" zapnot" mktbentry,
125:
126: $00 tab3 s" mull" mktbentry,
127: $20 tab3 s" mullq" mktbentry,
128: $30 tab3 s" umulh" mktbentry,
129: $40 tab3 s" mullv" mktbentry,
130: $60 tab3 s" mullqv" mktbentry,
131:
132: create Mfc_list
133:
134: $0000 s" trapb" mktbentry,
135: $0400 s" excb" mktbentry,
136: $4000 s" mb" mktbentry,
137: $4400 s" wmb" mktbentry,
138: $8000 s" fetch" mktbentry,
139: $a000 s" fetch_m" mktbentry,
140: $c000 s" rpcc" mktbentry,
141: $e000 s" rc" mktbentry,
142: $f000 s" rs" mktbentry,
143:
144: create Mbr_table
145:
146: ( 00 ) 0 s" jmp" mktbentry,
147: ( 01 ) 0 s" jsr" mktbentry,
148: ( 02 ) 0 s" ret" mktbentry,
149: ( 03 ) 0 s" jsr_coroutine" mktbentry,
150:
151: create F-P_list
152:
153: $080 tab0 s" addf" mktbentry,
154: $081 tab0 s" subf" mktbentry,
155: $082 tab0 s" mulf" mktbentry,
156: $083 tab0 s" divf" mktbentry,
157: $09e tab0 s" cvtdg" mktbentry,
158: $0a0 tab0 s" addg" mktbentry,
159: $0a1 tab0 s" subg" mktbentry,
160: $0a2 tab0 s" mulg" mktbentry,
161: $0a3 tab0 s" divg" mktbentry,
162: $0a5 tab0 s" cmpgeq" mktbentry,
163: $0a6 tab0 s" cmpglt" mktbentry,
164: $0a7 tab0 s" cmpgle" mktbentry,
165: $0ac tab0 s" cvtgf" mktbentry,
166: $0ad tab0 s" cvtgd" mktbentry,
167: $0af tab0 s" cvtgq" mktbentry,
168: $0bc tab0 s" cvtqf" mktbentry,
169: $0be tab0 s" cvtqg" mktbentry,
170:
171: $080 tab1 s" adds" mktbentry,
172: $081 tab1 s" subs" mktbentry,
173: $082 tab1 s" mulls" mktbentry,
174: $083 tab1 s" divs" mktbentry,
175: $0a0 tab1 s" addt" mktbentry,
176: $0a1 tab1 s" subt" mktbentry,
177: $0a2 tab1 s" mullt" mktbentry,
178: $0a3 tab1 s" divt" mktbentry,
179: $0a4 tab1 s" cmptun" mktbentry,
180: $0a5 tab1 s" cmpteq" mktbentry,
181: $0a6 tab1 s" cmptlt" mktbentry,
182: $0a7 tab1 s" cmptle" mktbentry,
183: $0ac tab1 s" cvtts" mktbentry,
184: $0af tab1 s" cvttq" mktbentry,
185: $0bc tab1 s" cvtqs" mktbentry,
186: $0be tab1 s" cvtqt" mktbentry,
187: $2ac tab1 s" cvtst" mktbentry,
188:
189: $010 tab2 s" cvtlq" mktbentry,
190: $020 tab2 s" cpys" mktbentry,
191: $021 tab2 s" cpysn" mktbentry,
192: $022 tab2 s" cpyse" mktbentry,
193: $024 tab2 s" mt_fpcr" mktbentry,
194: $025 tab2 s" mf_fpcr" mktbentry,
195: $02a tab2 s" fcmoveq" mktbentry,
196: $02b tab2 s" fcmovne" mktbentry,
197: $02c tab2 s" fcmovlt" mktbentry,
198: $02d tab2 s" fcmovge" mktbentry,
199: $02e tab2 s" fcmovle" mktbentry,
200: $02f tab2 s" fcmovgt" mktbentry,
201: $030 tab2 s" cvtql" mktbentry,
202: $130 tab2 s" cvtqlv" mktbentry,
203: $530 tab2 s" cvtqlsv" mktbentry,
204:
205: create register_table
206:
207: ( 00 ) 0 s" v0" mktbentry,
208: ( 01 ) 0 s" t0" mktbentry,
209: ( 02 ) 0 s" t1" mktbentry,
210: ( 03 ) 0 s" t2" mktbentry,
211: ( 04 ) 0 s" t3" mktbentry,
212: ( 05 ) 0 s" t4" mktbentry,
213: ( 06 ) 0 s" t5" mktbentry,
214: ( 07 ) 0 s" t6" mktbentry,
215: ( 08 ) 0 s" t7" mktbentry,
216: ( 09 ) 0 s" s0" mktbentry,
217: ( 0a ) 0 s" s1" mktbentry,
218: ( 0b ) 0 s" s2" mktbentry,
219: ( 0c ) 0 s" s3" mktbentry,
220: ( 0d ) 0 s" s4" mktbentry,
221: ( 0e ) 0 s" s5" mktbentry,
222: ( 0f ) 0 s" fp" mktbentry,
223: ( 10 ) 0 s" a0" mktbentry,
224: ( 11 ) 0 s" a1" mktbentry,
225: ( 12 ) 0 s" a2" mktbentry,
226: ( 13 ) 0 s" a3" mktbentry,
227: ( 14 ) 0 s" a4" mktbentry,
228: ( 15 ) 0 s" a5" mktbentry,
229: ( 16 ) 0 s" t8" mktbentry,
230: ( 17 ) 0 s" t9" mktbentry,
231: ( 18 ) 0 s" t10" mktbentry,
232: ( 19 ) 0 s" t11" mktbentry,
233: ( 1a ) 0 s" ra" mktbentry,
234: ( 1b ) 0 s" t12" mktbentry,
235: ( 1c ) 0 s" at" mktbentry,
236: ( 1d ) 0 s" gp" mktbentry,
237: ( 1e ) 0 s" sp" mktbentry,
238: ( 1f ) 0 s" zero" mktbentry,
239:
240: defer decode_register
241:
242: : decode_register_symb ( register -- )
243: cells register_table +
244: @ print_string $20 emit
245: ;
246:
247: : decode_register_number ( register -- )
248: .
249: ;
250:
251: ' decode_register_number is decode_register
252: \ ' decode_register_symb is decode_register
253:
254: create decode_code
255:
256: : decode_Opc ( instruction tbentry -- )
257: print_string drop
258: ;
259:
260: : decode_Bra ( instruction tbentry -- )
261: swap
262: dup $03e00000 and 21 rshift decode_register
263: $001fffff and .
264: print_string
265: ;
266:
267: : decode_F-P ( instruction tbentry -- )
268: drop
269: dup $03e00000 and 21 rshift decode_register
270: dup $001f0000 and 16 rshift decode_register
271: dup $0000001f and decode_register
272: dup 26 rshift $15 -
273: swap $0000fff0 and 3 rshift or F-P_list
274: begin
275: dup @ rot swap over over $00000000ffffffff and
276: = if print_string swap drop register_table swap else drop endif
277: swap 1 cells + dup register_table >
278: until
279: drop drop
280: ;
281:
282: : decode_Mem ( instruction tbentry -- )
283: swap
284: dup $03e00000 and 21 rshift decode_register
285: dup $0000ffff and .
286: $001f0000 and 16 rshift decode_register
287: print_string
288: ;
289:
290: : decode_Mfc ( instruction tbentry -- )
291: drop
292: dup $03e00000 and 21 rshift decode_register
293: dup $001f0000 and 16 rshift decode_register
294: $0000ffff and Mfc_list
295: begin
296: dup @ rot swap over over $00000000ffffffff and
297: = if print_string drop drop register_table 1 else drop endif
298: swap 1 cells + dup F-P_list >
299: until
300: drop drop
301: ;
302:
303: : decode_Mbr ( instruction tbentry -- )
304: drop
305: dup $03e00000 and 21 rshift decode_register
306: dup $001f0000 and 16 rshift decode_register
307: dup $00003fff and decode_register
308: $0000c000 and 14 rshift cells Mbr_table +
309: @ print_string
310: ;
311:
312: : decode_Opr ( instruction tbentry -- )
313: drop
314: dup $03e00000 and 21 rshift decode_register
315: dup dup $00001000 and $00001000
316: = if
317: $001fe000 and 13 rshift . -1
318: else
319: $001f0000 and 16 rshift decode_register 0
320: endif
321: swap dup $0000001f and decode_register
322: dup 26 rshift $10 -
323: swap $00000fe0 and 3 rshift or Opr_list
324: begin
325: dup @ rot swap over over $00000000ffffffff and
326: = if print_string swap drop register_table swap else drop endif
327: swap 1 cells + dup Mfc_list >
328: until
329: drop drop if $23 emit endif
330: ;
331:
332: : decode_Pcd ( instruction tbentry -- )
333: swap
334: $0000000003ffffff and .
335: print_string
336: ;
337:
338: \ format
339:
340: ' decode_Opc decode_code - constant cOpc
341: ' decode_Bra decode_code - constant cBra
342: ' decode_F-P decode_code - constant cF-P
343: ' decode_Mem decode_code - constant cMem
344: ' decode_Mfc decode_code - constant cMfc
345: ' decode_Mbr decode_code - constant cMbr
346: ' decode_Opr decode_code - constant cOpr
347: ' decode_Pcd decode_code - constant cPcd
348:
349: create opcode_table
350:
351: ( 00 ) cPcd s" call_pal" mktbentry,
352: ( 01 ) cOpc s" opc01" mktbentry,
353: ( 02 ) cOpc s" opc02" mktbentry,
354: ( 03 ) cOpc s" opc03" mktbentry,
355: ( 04 ) cOpc s" opc04" mktbentry,
356: ( 05 ) cOpc s" opc05" mktbentry,
357: ( 06 ) cOpc s" opc06" mktbentry,
358: ( 07 ) cOpc s" opc07" mktbentry,
359: ( 08 ) cMem s" lda" mktbentry,
360: ( 09 ) cMem s" ldah" mktbentry,
361: ( 0a ) cOpc s" opc0a" mktbentry,
362: ( 0b ) cMem s" ldq_u" mktbentry,
363: ( 0c ) cOpc s" opc0c" mktbentry,
364: ( 0d ) cOpc s" opc0d" mktbentry,
365: ( 0e ) cOpc s" opc0e" mktbentry,
366: ( 0f ) cMem s" stq_u" mktbentry,
367: ( 10 ) cOpr s" " mktbentry,
368: ( 11 ) cOpr s" " mktbentry,
369: ( 12 ) cOpr s" " mktbentry,
370: ( 13 ) cOpr s" " mktbentry,
371: ( 14 ) cOpc s" opc14" mktbentry,
372: ( 15 ) cF-P s" " mktbentry,
373: ( 16 ) cF-P s" " mktbentry,
374: ( 17 ) cF-P s" " mktbentry,
375: ( 18 ) cMfc s" " mktbentry,
376: ( 19 ) cOpc s" pal19" mktbentry,
377: ( 1a ) cMbr s" " mktbentry,
378: ( 1b ) cOpc s" pal1b" mktbentry,
379: ( 1c ) cOpc s" opc1c" mktbentry,
380: ( 1d ) cOpc s" pal1d" mktbentry,
381: ( 1e ) cOpc s" pal1e" mktbentry,
382: ( 1f ) cOpc s" pal1f" mktbentry,
383: ( 20 ) cMem s" ldf" mktbentry,
384: ( 21 ) cMem s" ldg" mktbentry,
385: ( 22 ) cMem s" lds" mktbentry,
386: ( 23 ) cMem s" ldt" mktbentry,
387: ( 24 ) cMem s" stf" mktbentry,
388: ( 25 ) cMem s" stg" mktbentry,
389: ( 26 ) cMem s" sts" mktbentry,
390: ( 27 ) cMem s" stt" mktbentry,
391: ( 28 ) cMem s" ldl" mktbentry,
392: ( 29 ) cMem s" ldq" mktbentry,
393: ( 2a ) cMem s" ldl_l" mktbentry,
394: ( 2b ) cMem s" ldq_l" mktbentry,
395: ( 2c ) cMem s" stl" mktbentry,
396: ( 2d ) cMem s" stq" mktbentry,
397: ( 2e ) cMem s" stl_c" mktbentry,
398: ( 2f ) cMem s" stq_c" mktbentry,
399: ( 30 ) cBra s" br" mktbentry,
400: ( 31 ) cBra s" fbeq" mktbentry,
401: ( 32 ) cBra s" fblt" mktbentry,
402: ( 33 ) cBra s" fble" mktbentry,
403: ( 34 ) cBra s" bsr" mktbentry,
404: ( 35 ) cBra s" fbne" mktbentry,
405: ( 36 ) cBra s" fbge" mktbentry,
406: ( 37 ) cBra s" fbgt" mktbentry,
407: ( 38 ) cBra s" blbc" mktbentry,
408: ( 39 ) cBra s" beq" mktbentry,
409: ( 3a ) cBra s" blt" mktbentry,
410: ( 3b ) cBra s" ble" mktbentry,
411: ( 3c ) cBra s" blbs" mktbentry,
412: ( 3d ) cBra s" bne" mktbentry,
413: ( 3e ) cBra s" bge" mktbentry,
414: ( 3f ) cBra s" bgt" mktbentry,
415:
416: drop \ string_table end
417:
418: : decode_inst ( n -- ) \ instruction decoder
419: dup $fc000000 and
420: 26 rshift cells
421: opcode_table +
422: @ dup $00000000ffffffff and
423: decode_code + execute
424: $2c emit cr
425: ;
426:
427: : disasm ( addr n -- ) \ disassembler
428: cr 0
429: ?do
430: dup h@
431: over $28 emit space . $29 emit space
432: decode_inst
433: 4 +
434: loop
435: drop
436: ;
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