1:
2: \ bernd thallner 9725890 e881
3: \ disassembler in forth for alpha
4:
5: \ util
6:
7: require asm.fs
8:
9: \ : h@ ( addr -- n ) \ 32 bit fetch
10: \ dup dup aligned = if
11: \ @
12: \ $00000000ffffffff and
13: \ else
14: \ 4 - @
15: \ $20 rshift
16: \ endif
17: \ ;
18:
19: also assembler
20: vocabulary disassembler
21: get-current
22: also disassembler definitions
23:
24: create string_table
25: 1000 allot
26:
27: \ makes an table entry with following data structure
28: \ 64 start address in string_table 48 strlen 32 format (cOpc, cBra, cF-P, cMem, cMfc, cMbr, cOpr, cPcd) 0
29:
30: : mktbentry, { start format straddr strlen -- start } \ make table entry
31: straddr string_table start + strlen cmove
32: start 48 lshift
33: strlen 32 lshift or
34: format or
35: ,
36: start strlen +
37: ;
38:
39: \ prints the string from stringtable
40: \ table_entry = 64 start address in string_table 48 strlen 32 unused 0
41:
42: : print_string ( table_entry -- ) \ print string entry
43: dup
44: 48 rshift string_table +
45: swap
46: 32 rshift $000000000000ffff and
47: type
48: ;
49:
50: \ Opr tab0 opcode 10.xxx
51: \ Opr tab1 opcode 11.xxx
52: \ Opr tab2 opcode 12.xxx
53: \ Opr tab3 opcode 13.xxx
54:
55: \ F-P tab0 opcode 15.xxx
56: \ F-P tab1 opcode 16.xxx
57: \ F-P tab2 opcode 17.xxx
58:
59: : tab0 2* 2* ;
60: : tab1 2* 2* 1 + ;
61: : tab2 2* 2* 2 + ;
62: : tab3 2* 2* 3 + ;
63:
64: 0 \ string_table offset
65:
66: create Opr_list
67:
68: $00 tab0 s" addl" mktbentry,
69: $40 tab0 s" addlv" mktbentry,
70: $20 tab0 s" addq" mktbentry,
71: $60 tab0 s" addqv" mktbentry,
72: $0f tab0 s" cmpbge" mktbentry,
73: $2d tab0 s" cmpeq" mktbentry,
74: $6d tab0 s" cmple" mktbentry,
75: $4d tab0 s" cmplt" mktbentry,
76: $3d tab0 s" cmpule" mktbentry,
77: $1d tab0 s" cmpult" mktbentry,
78: $02 tab0 s" s4addl" mktbentry,
79: $22 tab0 s" s4addq" mktbentry,
80: $0b tab0 s" s4subl" mktbentry,
81: $2b tab0 s" s4subq" mktbentry,
82: $12 tab0 s" s8addl" mktbentry,
83: $32 tab0 s" s8addq" mktbentry,
84: $1b tab0 s" s8ubl" mktbentry,
85: $3b tab0 s" s8ubq" mktbentry,
86: $09 tab0 s" subl" mktbentry,
87: $49 tab0 s" sublv" mktbentry,
88: $29 tab0 s" subq" mktbentry,
89: $69 tab0 s" subqv" mktbentry,
90:
91: $00 tab1 s" and" mktbentry,
92: $08 tab1 s" bic" mktbentry,
93: $20 tab1 s" bis" mktbentry,
94: $24 tab1 s" cmoveq" mktbentry,
95: $46 tab1 s" cmovge" mktbentry,
96: $66 tab1 s" cmovgt" mktbentry,
97: $16 tab1 s" cmovlbc" mktbentry,
98: $14 tab1 s" cmovlbs" mktbentry,
99: $64 tab1 s" cmovle" mktbentry,
100: $44 tab1 s" cmovlt" mktbentry,
101: $26 tab1 s" cmovne" mktbentry,
102: $48 tab1 s" eqv" mktbentry,
103: $28 tab1 s" ornot" mktbentry,
104: $40 tab1 s" xor" mktbentry,
105:
106: $06 tab2 s" extbl" mktbentry,
107: $6a tab2 s" extlh" mktbentry,
108: $26 tab2 s" extll" mktbentry,
109: $7a tab2 s" extqh" mktbentry,
110: $36 tab2 s" extql" mktbentry,
111: $5a tab2 s" extwh" mktbentry,
112: $16 tab2 s" extwl" mktbentry,
113: $0b tab2 s" insbl" mktbentry,
114: $67 tab2 s" inslh" mktbentry,
115: $2b tab2 s" insll" mktbentry,
116: $77 tab2 s" insqh" mktbentry,
117: $3b tab2 s" insql" mktbentry,
118: $57 tab2 s" inswh" mktbentry,
119: $1b tab2 s" inswl" mktbentry,
120: $02 tab2 s" mskbl" mktbentry,
121: $62 tab2 s" msklh" mktbentry,
122: $22 tab2 s" mskll" mktbentry,
123: $72 tab2 s" mskqh" mktbentry,
124: $32 tab2 s" mskql" mktbentry,
125: $52 tab2 s" mskwh" mktbentry,
126: $12 tab2 s" mskwl" mktbentry,
127: $39 tab2 s" sll" mktbentry,
128: $3c tab2 s" sra" mktbentry,
129: $34 tab2 s" srl" mktbentry,
130: $30 tab2 s" zap" mktbentry,
131: $31 tab2 s" zapnot" mktbentry,
132:
133: $00 tab3 s" mull" mktbentry,
134: $20 tab3 s" mullq" mktbentry,
135: $30 tab3 s" umulh" mktbentry,
136: $40 tab3 s" mullv" mktbentry,
137: $60 tab3 s" mullqv" mktbentry,
138:
139: create Mfc_list
140:
141: $0000 s" trapb" mktbentry,
142: $0400 s" excb" mktbentry,
143: $4000 s" mb" mktbentry,
144: $4400 s" wmb" mktbentry,
145: $8000 s" fetch" mktbentry,
146: $a000 s" fetch_m" mktbentry,
147: $c000 s" rpcc" mktbentry,
148: $e000 s" rc" mktbentry,
149: $f000 s" rs" mktbentry,
150:
151: create Mbr_table
152:
153: ( 00 ) 0 s" jmp" mktbentry,
154: ( 01 ) 0 s" jsr" mktbentry,
155: ( 02 ) 0 s" ret" mktbentry,
156: ( 03 ) 0 s" jsr_coroutine" mktbentry,
157:
158: create F-P_list
159:
160: $080 tab0 s" addf" mktbentry,
161: $081 tab0 s" subf" mktbentry,
162: $082 tab0 s" mulf" mktbentry,
163: $083 tab0 s" divf" mktbentry,
164: $09e tab0 s" cvtdg" mktbentry,
165: $0a0 tab0 s" addg" mktbentry,
166: $0a1 tab0 s" subg" mktbentry,
167: $0a2 tab0 s" mulg" mktbentry,
168: $0a3 tab0 s" divg" mktbentry,
169: $0a5 tab0 s" cmpgeq" mktbentry,
170: $0a6 tab0 s" cmpglt" mktbentry,
171: $0a7 tab0 s" cmpgle" mktbentry,
172: $0ac tab0 s" cvtgf" mktbentry,
173: $0ad tab0 s" cvtgd" mktbentry,
174: $0af tab0 s" cvtgq" mktbentry,
175: $0bc tab0 s" cvtqf" mktbentry,
176: $0be tab0 s" cvtqg" mktbentry,
177:
178: $080 tab1 s" adds" mktbentry,
179: $081 tab1 s" subs" mktbentry,
180: $082 tab1 s" mulls" mktbentry,
181: $083 tab1 s" divs" mktbentry,
182: $0a0 tab1 s" addt" mktbentry,
183: $0a1 tab1 s" subt" mktbentry,
184: $0a2 tab1 s" mullt" mktbentry,
185: $0a3 tab1 s" divt" mktbentry,
186: $0a4 tab1 s" cmptun" mktbentry,
187: $0a5 tab1 s" cmpteq" mktbentry,
188: $0a6 tab1 s" cmptlt" mktbentry,
189: $0a7 tab1 s" cmptle" mktbentry,
190: $0ac tab1 s" cvtts" mktbentry,
191: $0af tab1 s" cvttq" mktbentry,
192: $0bc tab1 s" cvtqs" mktbentry,
193: $0be tab1 s" cvtqt" mktbentry,
194: $2ac tab1 s" cvtst" mktbentry,
195:
196: $010 tab2 s" cvtlq" mktbentry,
197: $020 tab2 s" cpys" mktbentry,
198: $021 tab2 s" cpysn" mktbentry,
199: $022 tab2 s" cpyse" mktbentry,
200: $024 tab2 s" mt_fpcr" mktbentry,
201: $025 tab2 s" mf_fpcr" mktbentry,
202: $02a tab2 s" fcmoveq" mktbentry,
203: $02b tab2 s" fcmovne" mktbentry,
204: $02c tab2 s" fcmovlt" mktbentry,
205: $02d tab2 s" fcmovge" mktbentry,
206: $02e tab2 s" fcmovle" mktbentry,
207: $02f tab2 s" fcmovgt" mktbentry,
208: $030 tab2 s" cvtql" mktbentry,
209: $130 tab2 s" cvtqlv" mktbentry,
210: $530 tab2 s" cvtqlsv" mktbentry,
211:
212: create register_table
213:
214: ( 00 ) 0 s" v0" mktbentry,
215: ( 01 ) 0 s" t0" mktbentry,
216: ( 02 ) 0 s" t1" mktbentry,
217: ( 03 ) 0 s" t2" mktbentry,
218: ( 04 ) 0 s" t3" mktbentry,
219: ( 05 ) 0 s" t4" mktbentry,
220: ( 06 ) 0 s" t5" mktbentry,
221: ( 07 ) 0 s" t6" mktbentry,
222: ( 08 ) 0 s" t7" mktbentry,
223: ( 09 ) 0 s" s0" mktbentry,
224: ( 0a ) 0 s" s1" mktbentry,
225: ( 0b ) 0 s" s2" mktbentry,
226: ( 0c ) 0 s" s3" mktbentry,
227: ( 0d ) 0 s" s4" mktbentry,
228: ( 0e ) 0 s" s5" mktbentry,
229: ( 0f ) 0 s" fp" mktbentry,
230: ( 10 ) 0 s" a0" mktbentry,
231: ( 11 ) 0 s" a1" mktbentry,
232: ( 12 ) 0 s" a2" mktbentry,
233: ( 13 ) 0 s" a3" mktbentry,
234: ( 14 ) 0 s" a4" mktbentry,
235: ( 15 ) 0 s" a5" mktbentry,
236: ( 16 ) 0 s" t8" mktbentry,
237: ( 17 ) 0 s" t9" mktbentry,
238: ( 18 ) 0 s" t10" mktbentry,
239: ( 19 ) 0 s" t11" mktbentry,
240: ( 1a ) 0 s" ra" mktbentry,
241: ( 1b ) 0 s" t12" mktbentry,
242: ( 1c ) 0 s" at" mktbentry,
243: ( 1d ) 0 s" gp" mktbentry,
244: ( 1e ) 0 s" sp" mktbentry,
245: ( 1f ) 0 s" zero" mktbentry,
246:
247: defer decode_register
248:
249: : decode_register_symb ( register -- )
250: cells register_table +
251: @ print_string $20 emit
252: ;
253:
254: : decode_register_number ( register -- )
255: .
256: ;
257:
258: ' decode_register_number is decode_register
259: \ ' decode_register_symb is decode_register
260:
261: create decode_code
262:
263: : decode_Opc ( instruction tbentry -- )
264: print_string drop
265: ;
266:
267: : decode_Bra ( instruction tbentry -- )
268: swap
269: dup $03e00000 and 21 rshift decode_register
270: $001fffff and .
271: print_string
272: ;
273:
274: : decode_F-P ( instruction tbentry -- )
275: drop
276: dup $03e00000 and 21 rshift decode_register
277: dup $001f0000 and 16 rshift decode_register
278: dup $0000001f and decode_register
279: dup 26 rshift $15 -
280: swap $0000fff0 and 3 rshift or F-P_list
281: begin
282: dup @ rot swap over over $00000000ffffffff and
283: = if print_string swap drop register_table swap else drop endif
284: swap 1 cells + dup register_table >
285: until
286: drop drop
287: ;
288:
289: : decode_Mem ( instruction tbentry -- )
290: swap
291: dup $03e00000 and 21 rshift decode_register
292: dup $0000ffff and .
293: $001f0000 and 16 rshift decode_register
294: print_string
295: ;
296:
297: : decode_Mfc ( instruction tbentry -- )
298: drop
299: dup $03e00000 and 21 rshift decode_register
300: dup $001f0000 and 16 rshift decode_register
301: $0000ffff and Mfc_list
302: begin
303: dup @ rot swap over over $00000000ffffffff and
304: = if print_string drop drop register_table 1 else drop endif
305: swap 1 cells + dup F-P_list >
306: until
307: drop drop
308: ;
309:
310: : decode_Mbr ( instruction tbentry -- )
311: drop
312: dup $03e00000 and 21 rshift decode_register
313: dup $001f0000 and 16 rshift decode_register
314: dup $00003fff and decode_register
315: $0000c000 and 14 rshift cells Mbr_table +
316: @ print_string
317: ;
318:
319: : decode_Opr ( instruction tbentry -- )
320: drop
321: dup $03e00000 and 21 rshift decode_register
322: dup dup $00001000 and $00001000
323: = if
324: $001fe000 and 13 rshift . -1
325: else
326: $001f0000 and 16 rshift decode_register 0
327: endif
328: swap dup $0000001f and decode_register
329: dup 26 rshift $10 -
330: swap $00000fe0 and 3 rshift or Opr_list
331: begin
332: dup @ rot swap over over $00000000ffffffff and
333: = if print_string swap drop register_table swap else drop endif
334: swap 1 cells + dup Mfc_list >
335: until
336: drop drop if $23 emit endif
337: ;
338:
339: : decode_Pcd ( instruction tbentry -- )
340: swap
341: $0000000003ffffff and .
342: print_string
343: ;
344:
345: \ format
346:
347: ' decode_Opc decode_code - constant cOpc
348: ' decode_Bra decode_code - constant cBra
349: ' decode_F-P decode_code - constant cF-P
350: ' decode_Mem decode_code - constant cMem
351: ' decode_Mfc decode_code - constant cMfc
352: ' decode_Mbr decode_code - constant cMbr
353: ' decode_Opr decode_code - constant cOpr
354: ' decode_Pcd decode_code - constant cPcd
355:
356: create opcode_table
357:
358: ( 00 ) cPcd s" call_pal" mktbentry,
359: ( 01 ) cOpc s" opc01" mktbentry,
360: ( 02 ) cOpc s" opc02" mktbentry,
361: ( 03 ) cOpc s" opc03" mktbentry,
362: ( 04 ) cOpc s" opc04" mktbentry,
363: ( 05 ) cOpc s" opc05" mktbentry,
364: ( 06 ) cOpc s" opc06" mktbentry,
365: ( 07 ) cOpc s" opc07" mktbentry,
366: ( 08 ) cMem s" lda" mktbentry,
367: ( 09 ) cMem s" ldah" mktbentry,
368: ( 0a ) cOpc s" opc0a" mktbentry,
369: ( 0b ) cMem s" ldq_u" mktbentry,
370: ( 0c ) cOpc s" opc0c" mktbentry,
371: ( 0d ) cOpc s" opc0d" mktbentry,
372: ( 0e ) cOpc s" opc0e" mktbentry,
373: ( 0f ) cMem s" stq_u" mktbentry,
374: ( 10 ) cOpr s" " mktbentry,
375: ( 11 ) cOpr s" " mktbentry,
376: ( 12 ) cOpr s" " mktbentry,
377: ( 13 ) cOpr s" " mktbentry,
378: ( 14 ) cOpc s" opc14" mktbentry,
379: ( 15 ) cF-P s" " mktbentry,
380: ( 16 ) cF-P s" " mktbentry,
381: ( 17 ) cF-P s" " mktbentry,
382: ( 18 ) cMfc s" " mktbentry,
383: ( 19 ) cOpc s" pal19" mktbentry,
384: ( 1a ) cMbr s" " mktbentry,
385: ( 1b ) cOpc s" pal1b" mktbentry,
386: ( 1c ) cOpc s" opc1c" mktbentry,
387: ( 1d ) cOpc s" pal1d" mktbentry,
388: ( 1e ) cOpc s" pal1e" mktbentry,
389: ( 1f ) cOpc s" pal1f" mktbentry,
390: ( 20 ) cMem s" ldf" mktbentry,
391: ( 21 ) cMem s" ldg" mktbentry,
392: ( 22 ) cMem s" lds" mktbentry,
393: ( 23 ) cMem s" ldt" mktbentry,
394: ( 24 ) cMem s" stf" mktbentry,
395: ( 25 ) cMem s" stg" mktbentry,
396: ( 26 ) cMem s" sts" mktbentry,
397: ( 27 ) cMem s" stt" mktbentry,
398: ( 28 ) cMem s" ldl" mktbentry,
399: ( 29 ) cMem s" ldq" mktbentry,
400: ( 2a ) cMem s" ldl_l" mktbentry,
401: ( 2b ) cMem s" ldq_l" mktbentry,
402: ( 2c ) cMem s" stl" mktbentry,
403: ( 2d ) cMem s" stq" mktbentry,
404: ( 2e ) cMem s" stl_c" mktbentry,
405: ( 2f ) cMem s" stq_c" mktbentry,
406: ( 30 ) cBra s" br" mktbentry,
407: ( 31 ) cBra s" fbeq" mktbentry,
408: ( 32 ) cBra s" fblt" mktbentry,
409: ( 33 ) cBra s" fble" mktbentry,
410: ( 34 ) cBra s" bsr" mktbentry,
411: ( 35 ) cBra s" fbne" mktbentry,
412: ( 36 ) cBra s" fbge" mktbentry,
413: ( 37 ) cBra s" fbgt" mktbentry,
414: ( 38 ) cBra s" blbc" mktbentry,
415: ( 39 ) cBra s" beq" mktbentry,
416: ( 3a ) cBra s" blt" mktbentry,
417: ( 3b ) cBra s" ble" mktbentry,
418: ( 3c ) cBra s" blbs" mktbentry,
419: ( 3d ) cBra s" bne" mktbentry,
420: ( 3e ) cBra s" bge" mktbentry,
421: ( 3f ) cBra s" bgt" mktbentry,
422:
423: drop \ string_table end
424:
425: set-current
426:
427: : disasm-inst ( n -- ) \ instruction decoder
428: dup $fc000000 and
429: 26 rshift cells
430: opcode_table +
431: @ dup $00000000ffffffff and
432: decode_code + execute
433: $2c emit cr
434: ;
435:
436: : disasm ( addr u -- ) \ gforth
437: \G disassemble u aus starting at addr
438: cr bounds
439: u+do
440: ." ( " i hex. ." ) "
441: i h@ disasm-inst
442: 4
443: +loop ;
444:
445: ' disasm is discode
446:
447: previous previous
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