Fwd: [hatari-devel] DSP Mandelbrot bug

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Update:

Looking at the values of b at time of final jec it seems that it might also be some kind of rounding issue:

00:800d9f:248aca <--- 3 pixels before
00:80064e:53e34a
00:8001b2:34bbf4
00:7fffff:3a74ca <--- bad pixel
00:80016c:07e922
00:800631:562b04
00:800e89:ff27ca <--- 3 pixels after

Anfang der weitergeleiteten Nachricht:

Von: Andreas Grabher <andreas.grabher@xxxxxxxxxxxx>
Betreff: [hatari-devel] DSP Mandelbrot bug
Datum: 22. November 2015 09:53:17 MEZ

Hello Hatari Community,

i am experiencing a hard to find DSP bug here with Previous. Luckily it can be made "visible" using NeXTstep's included Mandelbrot demo. It might also be responsible for some distorted audio in other applications.

I appended a screenshot of the mandelbrot application where the effect of the bug is clearly visible. I pointed to one failing pixel. I also appended some debugging output containing the calculation of the failing pixel and one pixel before and one after the failing one. The last file i appended contains an overview about the variables during calculation to get a better overview.

Short overview on the calculation:
Every pixel is calculated separately. The visible pixel color is derived from the remaining loop count of some calculation. The higher the remaining count, the lower is the output value of the function. The loop exits using a jec instruction (check extension bit, exit if false).
For the "good" pixels it exits after the second run, because the upper 9 bits of b are no longer all 0. For the "bad" pixel it does not exit, because these bits are still all 0. The most suspect part of the calculation seems to be mpy +x0,x0,a at p:0097. The value of a after the third call of that instruction seems to not fit into the pattern.

Can someone with more DSP experience see the bug? It might or might not be in dsp_mul56.

Any help is greatly appreciated!

Andreas

p:008f - p:0094: setup

x0:
0x2bd70a (+ 0x51ec)
0x2c28f6 (+ 0x51eb)
0x2c7ae1

x1:
0x2bd70a
0x2c28f6
0x2c7ae1

a:
00:2bd70a:000000
00:2c28f6:000000
00:2c7ae1:000000

y0:
0x20f5c3
0x20f5c3
0x20f5c3

y1:
0x20f5c3
0x20f5c3
0x20f5c3

b:
00:20f5c3:000000
00:20f5c3:000000
00:20f5c3:000000

sp:
04
04
04

ssh:
96
96
96

ssl:
8050
8050
8050

la:
00a7
00a7
00a7

lc:
0003
0003
0003


do:

p:0096: mpy +y0,y0,b a,x0:
x0: ==, 38e55f, ff13b5
x0: ==, 39a7ef, fff376
x0: ==, 3a6b4f, 00d874
b: 00:087cb9:5da512, 00:2fabf8:5b9408, 00:7ffffe:000002
b: 00:087cb9:5da512, 00:30132d:154082, 00:7ffffe:000002
b: 00:087cb9:5da512, 00:307acf:d30702, 00:7ffffe:000002
sr: ==, ==, 8040
sr: ==, ==, 8040
sr: ==, ==, 8041

p:0097: mpy +x0,x0,a:
a: 00:0f03e3:fb98c8, 00:194a4e:263282, 00:0001b4:34bbf2
a: 00:0f3c36:3b98c8, 00:19f86d:2f6242, 00:000001:3a74c8
a: 00:0f74f0:a67382, 00:1aa999:8e44c2, 00:00016e:07e920
sr: ==, ==, 8050
sr: ==, ==, 8050
sr: ==, ==, 8051

p:0098: add a,b:
b: 00:17809d:593dda, 00:48f646:81c68a, 00:8001b2:34bbf4
b: 00:17b8ef:993dda, 00:4a0b9a:44a2c4, 00:7fffff:3a74ca
b: 00:17f1aa:041894, 00:4b2469:614bc4, 00:80016c:07e922
sr: ==, 8040, 8060
sr: ==, 8040, 8040
sr: ==, 8040, 8060

p:0099: jec p:$00a1:
true, true, false --> enddo
true, true, true
true, true, false --> enddo

p:00a1: mpy +y0,x0,b:
b: 00:0b49ee:e2bd3c, 00:22b8e1:dd4f84
b: 00:0b5f07:2d42c4, 00:2355a0:579062, ff:fff376:001914
b: 00:0b741f:35dcc6, 00:23f3de:e304e2

p:00a2: asl b:
b: 00:1693dd:c57a78, 00:4571c3:ba9f08
b: 00:16be0e:5a8588, 00:46ab40:af20c4, ff:ffe6ec:003228
b: 00:16e83e:6bb98c, 00:47e7bd:c609c4

p:00a3: asl b:
b: 00:2d27bb:8af4f0, 00:8ae387:753e10
b: 00:2d7c1c:b50b10, 00:8d5681:5e4188, ff:ffcdd8:006450
b: 00:2dd07c:d77318, 00:8fcf7b:8c1388

p:00a4: add y1,b:
b: 00:4e1d7e:8af4f0, 00:abd94a:753e10
b: 00:4e71df:b50b10, 00:ae4c44:5e4188, 00:20c39b:006450
b: 00:4ec63f:d77318, 00:b0c53e:8c1388

p:00a5: mac -y0,y0,a b,y0
y0: 4e1d7e, 7fffff
y0: 4e71df, 7fffff, 20c39b
y0: 4ec63f, 7fffff
a: 00:06872a:9df3b6, ff:e99e55:ca9e7a
a: 00:06bf7c:ddf3b6, ff:e9e540:1a21c0, ff:800003:3a74c6
a: 00:06f837:48ce70, ff:ea2ec9:bb3dc0

p:00a6: asl a:
a: 00:0d0e55:3be76c, ff:d33cab:953cf4
a: 00:0d7ef9:bbe76c, ff:d3ca80:344380, ff:000006:74e98c
a: 00:0df06e:919ce0, ff:d45d93:767b80

p:00a7: add x1,a:
a: 00:38e55f:3be76c, ff:ff13b5:953cf4
a: 00:39a7ef:bbe76c, ff:fff376:344380, ff:2c28fc:74e98c
a: 00:3a6b4f:919ce0, 00:00d874:767b80

loop back --> p:0096 (or continue at p:00a8 if loop counter 0)
	Mem: x:0x31cc  0x000002 -> 0x000002
p:008f  44d900         (02 cyc)  move x:(r1)+,x0                                   
	Reg: x0  $000001 -> $2bd70a
	Reg: r1  $2a9a -> $2a9b
p:0090  46d100         (02 cyc)  move x:(r1)-,y0                                   
	Reg: y0  $7fffff -> $20f5c3
	Reg: r1  $2a9b -> $2a9a
p:0091  044911         (04 cyc)  lua (r1)+n1,r1                                    
	Reg: r1  $2a9a -> $2a9c
p:0092  208541         (02 cyc)  tfr x0,a x0,x1                                    
	Reg: x1  $2b851f -> $2bd70a
	Reg: a   $00:000002:000000 -> $00:2bd70a:000000
p:0093  20c759         (02 cyc)  tfr y0,b y0,y1                                    
	Reg: b   $00:80064e:53e34a -> $00:20f5c3:000000
p:0094  06d500 0000a7  (06 cyc)  do r5,p:$00a7                                     
	Reg: sp  $02 -> $04
	Reg: ssh  $8f -> $96
	Reg: ssl  $10 -> $8050
	Reg: la  $00a9 -> $00a7
	Reg: lc  $00f3 -> $0003
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: b   $00:20f5c3:000000 -> $00:087cb9:5da512
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:2bd70a:000000 -> $00:0f03e3:fb98c8
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:087cb9:5da512 -> $00:17809d:593dda
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:17809d:593dda -> $00:0b49ee:e2bd3c
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:0b49ee:e2bd3c -> $00:1693dd:c57a78
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:1693dd:c57a78 -> $00:2d27bb:8af4f0
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $00:2d27bb:8af4f0 -> $00:4e1d7e:8af4f0
	Reg: sr  $8050 -> $8040
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $20f5c3 -> $4e1d7e
	Reg: a   $00:0f03e3:fb98c8 -> $00:06872a:9df3b6
	Reg: sr  $8040 -> $8050
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $00:06872a:9df3b6 -> $00:0d0e55:3be76c
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $00:0d0e55:3be76c -> $00:38e55f:3be76c
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: x0  $2bd70a -> $38e55f
	Reg: b   $00:4e1d7e:8af4f0 -> $00:2fabf8:5b9408
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:38e55f:3be76c -> $00:194a4e:263282
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:2fabf8:5b9408 -> $00:48f646:81c68a
	Reg: sr  $8050 -> $8040
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:48f646:81c68a -> $00:22b8e1:dd4f84
	Reg: sr  $8040 -> $8050
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:22b8e1:dd4f84 -> $00:4571c3:ba9f08
	Reg: sr  $8050 -> $8040
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:4571c3:ba9f08 -> $00:8ae387:753e10
	Reg: sr  $8040 -> $8060
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $00:8ae387:753e10 -> $00:abd94a:753e10
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $4e1d7e -> $7fffff
	Reg: a   $00:194a4e:263282 -> $ff:e99e55:ca9e7a
	Reg: sr  $8060 -> $8058
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $ff:e99e55:ca9e7a -> $ff:d33cab:953cf4
	Reg: sr  $8058 -> $8059
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $ff:d33cab:953cf4 -> $ff:ff13b5:953cf4
	Reg: sr  $8059 -> $8058
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: x0  $38e55f -> $ff13b5
	Reg: b   $00:abd94a:753e10 -> $00:7ffffe:000002
	Reg: sr  $8058 -> $8040
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $ff:ff13b5:953cf4 -> $00:0001b4:34bbf2
	Reg: sr  $8040 -> $8050
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:7ffffe:000002 -> $00:8001b2:34bbf4
	Reg: sr  $8050 -> $8060
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:009b  22ae00         (02 cyc)  move r5,a                                         
	Reg: a   $00:0001b4:34bbf2 -> $00:000003:000000
p:009c  0444bf         (02 cyc)  movec lc,x0                                       
	Reg: x0  $ff13b5 -> $000001
p:009d  200044         (02 cyc)  sub x0,a                                          
	Reg: a   $00:000003:000000 -> $00:000002:000000
	Reg: sr  $8060 -> $8050
p:009e  00008c         (02 cyc)  enddo                                             
	Reg: sp  $04 -> $02
	Reg: ssh  $96 -> $8f
	Reg: ssl  $8050 -> $10
	Reg: la  $00a7 -> $00a9
	Reg: lc  $0001 -> $00f3
p:009f  0af080 0000a9  (06 cyc)  jmp p:$00a9                                       
p:00a9  564e00         (02 cyc)  move a,x:(r6)+n6                                  
	Reg: r6  $31cd -> $31ce
	Mem: x:0x31cd  0x000002 -> 0x000002
p:008f  44d900         (02 cyc)  move x:(r1)+,x0                                   
	Reg: x0  $000001 -> $2c28f6
	Reg: r1  $2a9c -> $2a9d
p:0090  46d100         (02 cyc)  move x:(r1)-,y0                                   
	Reg: y0  $7fffff -> $20f5c3
	Reg: r1  $2a9d -> $2a9c
p:0091  044911         (04 cyc)  lua (r1)+n1,r1                                    
	Reg: r1  $2a9c -> $2a9e
p:0092  208541         (02 cyc)  tfr x0,a x0,x1                                    
	Reg: x1  $2bd70a -> $2c28f6
	Reg: a   $00:000002:000000 -> $00:2c28f6:000000
p:0093  20c759         (02 cyc)  tfr y0,b y0,y1                                    
	Reg: b   $00:8001b2:34bbf4 -> $00:20f5c3:000000
p:0094  06d500 0000a7  (06 cyc)  do r5,p:$00a7                                     
	Reg: sp  $02 -> $04
	Reg: ssh  $8f -> $96
	Reg: ssl  $10 -> $8050
	Reg: la  $00a9 -> $00a7
	Reg: lc  $00f2 -> $0003
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: b   $00:20f5c3:000000 -> $00:087cb9:5da512
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:2c28f6:000000 -> $00:0f3c36:3b98c8
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:087cb9:5da512 -> $00:17b8ef:993dda
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:17b8ef:993dda -> $00:0b5f07:2d42c4
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:0b5f07:2d42c4 -> $00:16be0e:5a8588
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:16be0e:5a8588 -> $00:2d7c1c:b50b10
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $00:2d7c1c:b50b10 -> $00:4e71df:b50b10
	Reg: sr  $8050 -> $8040
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $20f5c3 -> $4e71df
	Reg: a   $00:0f3c36:3b98c8 -> $00:06bf7c:ddf3b6
	Reg: sr  $8040 -> $8050
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $00:06bf7c:ddf3b6 -> $00:0d7ef9:bbe76c
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $00:0d7ef9:bbe76c -> $00:39a7ef:bbe76c
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: x0  $2c28f6 -> $39a7ef
	Reg: b   $00:4e71df:b50b10 -> $00:30132d:154082
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:39a7ef:bbe76c -> $00:19f86d:2f6242
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:30132d:154082 -> $00:4a0b9a:44a2c4
	Reg: sr  $8050 -> $8040
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:4a0b9a:44a2c4 -> $00:2355a0:579062
	Reg: sr  $8040 -> $8050
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:2355a0:579062 -> $00:46ab40:af20c4
	Reg: sr  $8050 -> $8040
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:46ab40:af20c4 -> $00:8d5681:5e4188
	Reg: sr  $8040 -> $8060
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $00:8d5681:5e4188 -> $00:ae4c44:5e4188
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $4e71df -> $7fffff
	Reg: a   $00:19f86d:2f6242 -> $ff:e9e540:1a21c0
	Reg: sr  $8060 -> $8058
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $ff:e9e540:1a21c0 -> $ff:d3ca80:344380
	Reg: sr  $8058 -> $8059
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $ff:d3ca80:344380 -> $ff:fff376:344380
	Reg: sr  $8059 -> $8058
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: x0  $39a7ef -> $fff376
	Reg: b   $00:ae4c44:5e4188 -> $00:7ffffe:000002
	Reg: sr  $8058 -> $8040
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $ff:fff376:344380 -> $00:000001:3a74c8
	Reg: sr  $8040 -> $8050
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:7ffffe:000002 -> $00:7fffff:3a74ca
	Reg: sr  $8050 -> $8040
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:7fffff:3a74ca -> $ff:fff376:001914
	Reg: sr  $8040 -> $8058
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $ff:fff376:001914 -> $ff:ffe6ec:003228
	Reg: sr  $8058 -> $8059
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $ff:ffe6ec:003228 -> $ff:ffcdd8:006450
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $ff:ffcdd8:006450 -> $00:20c39b:006450
	Reg: sr  $8059 -> $8051
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $7fffff -> $20c39b
	Reg: a   $00:000001:3a74c8 -> $ff:800003:3a74c6
	Reg: sr  $8051 -> $8049
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $ff:800003:3a74c6 -> $ff:000006:74e98c
	Reg: sr  $8049 -> $8079
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $ff:000006:74e98c -> $ff:2c28fc:74e98c
	Reg: sr  $8079 -> $8078
p:00a8  22ae00         (02 cyc)  move r5,a                                         
	Reg: a   $ff:2c28fc:74e98c -> $00:000003:000000
p:00a9  564e00         (02 cyc)  move a,x:(r6)+n6                                  
	Reg: r6  $31ce -> $31cf
	Mem: x:0x31ce  0x000002 -> 0x000003
p:008f  44d900         (02 cyc)  move x:(r1)+,x0                                   
	Reg: x0  $fff376 -> $2c7ae1
	Reg: r1  $2a9e -> $2a9f
p:0090  46d100         (02 cyc)  move x:(r1)-,y0                                   
	Reg: y0  $20c39b -> $20f5c3
	Reg: r1  $2a9f -> $2a9e
p:0091  044911         (04 cyc)  lua (r1)+n1,r1                                    
	Reg: r1  $2a9e -> $2aa0
p:0092  208541         (02 cyc)  tfr x0,a x0,x1                                    
	Reg: x1  $2c28f6 -> $2c7ae1
	Reg: a   $00:000003:000000 -> $00:2c7ae1:000000
p:0093  20c759         (02 cyc)  tfr y0,b y0,y1                                    
	Reg: b   $00:20c39b:006450 -> $00:20f5c3:000000
p:0094  06d500 0000a7  (06 cyc)  do r5,p:$00a7                                     
	Reg: sp  $02 -> $04
	Reg: ssh  $8f -> $96
	Reg: ssl  $10 -> $8078
	Reg: la  $00a9 -> $00a7
	Reg: lc  $00f1 -> $0003
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: b   $00:20f5c3:000000 -> $00:087cb9:5da512
	Reg: sr  $8078 -> $8050
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:2c7ae1:000000 -> $00:0f74f0:a67382
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:087cb9:5da512 -> $00:17f1aa:041894
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:17f1aa:041894 -> $00:0b741f:35dcc6
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:0b741f:35dcc6 -> $00:16e83e:6bb98c
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:16e83e:6bb98c -> $00:2dd07c:d77318
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $00:2dd07c:d77318 -> $00:4ec63f:d77318
	Reg: sr  $8050 -> $8040
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $20f5c3 -> $4ec63f
	Reg: a   $00:0f74f0:a67382 -> $00:06f837:48ce70
	Reg: sr  $8040 -> $8050
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $00:06f837:48ce70 -> $00:0df06e:919ce0
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $00:0df06e:919ce0 -> $00:3a6b4f:919ce0
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: x0  $2c7ae1 -> $3a6b4f
	Reg: b   $00:4ec63f:d77318 -> $00:307acf:d30702
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:3a6b4f:919ce0 -> $00:1aa999:8e44c2
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:307acf:d30702 -> $00:4b2469:614bc4
	Reg: sr  $8050 -> $8040
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:00a1  2000d8         (02 cyc)  mpy +y0,x0,b                                      
	Reg: b   $00:4b2469:614bc4 -> $00:23f3de:e304e2
	Reg: sr  $8040 -> $8050
p:00a2  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:23f3de:e304e2 -> $00:47e7bd:c609c4
	Reg: sr  $8050 -> $8040
p:00a3  20003a         (02 cyc)  asl b                                             
	Reg: b   $00:47e7bd:c609c4 -> $00:8fcf7b:8c1388
	Reg: sr  $8040 -> $8060
p:00a4  200078         (02 cyc)  add y1,b                                          
	Reg: b   $00:8fcf7b:8c1388 -> $00:b0c53e:8c1388
p:00a5  21e696         (02 cyc)  mac -y0,y0,a b,y0                                 
	Reg: y0  $4ec63f -> $7fffff
	Reg: a   $00:1aa999:8e44c2 -> $ff:ea2ec9:bb3dc0
	Reg: sr  $8060 -> $8058
p:00a6  200032         (02 cyc)  asl a                                             
	Reg: a   $ff:ea2ec9:bb3dc0 -> $ff:d45d93:767b80
	Reg: sr  $8058 -> $8059
p:00a7  200060         (02 cyc)  add x1,a                                          
	Reg: a   $ff:d45d93:767b80 -> $00:00d874:767b80
	Reg: sr  $8059 -> $8051
p:0096  21c498         (02 cyc)  mpy +y0,y0,b a,x0                                 
	Reg: x0  $3a6b4f -> $00d874
	Reg: b   $00:b0c53e:8c1388 -> $00:7ffffe:000002
	Reg: sr  $8051 -> $8041
p:0097  200080         (02 cyc)  mpy +x0,x0,a                                      
	Reg: a   $00:00d874:767b80 -> $00:00016e:07e920
	Reg: sr  $8041 -> $8051
p:0098  200018         (02 cyc)  add a,b                                           
	Reg: b   $00:7ffffe:000002 -> $00:80016c:07e922
	Reg: sr  $8051 -> $8060
p:0099  0af0a5 0000a1  (06 cyc)  jec p:$00a1                                       
p:009b  22ae00         (02 cyc)  move r5,a                                         
	Reg: a   $00:00016e:07e920 -> $00:000003:000000
p:009c  0444bf         (02 cyc)  movec lc,x0                                       
	Reg: x0  $00d874 -> $000001
p:009d  200044         (02 cyc)  sub x0,a                                          
	Reg: a   $00:000003:000000 -> $00:000002:000000
	Reg: sr  $8060 -> $8050
p:009e  00008c         (02 cyc)  enddo                                             
	Reg: sp  $04 -> $02
	Reg: ssh  $96 -> $8f
	Reg: ssl  $8078 -> $10
	Reg: la  $00a7 -> $00a9
	Reg: lc  $0001 -> $00f1
p:009f  0af080 0000a9  (06 cyc)  jmp p:$00a9                                       
p:00a9  564e00         (02 cyc)  move a,x:(r6)+n6                                  
	Reg: r6  $31cf -> $31d0
	Mem: x:0x31cf  0x000002 -> 0x000002

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