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#rockbox log for 2022-03-09

00:25:24 Quit archpc (Ping timeout: 240 seconds)
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00:54:15***Saving seen data "./dancer.seen"
01:00
01:12:57rb-bluebotBuild Server message: New build round started. Revision 01e76548c3, 303 builds, 7 clients.
01:38:17sporkgerrit probably got overwhelmed by all of amachronic's patches
01:39:37rb-bluebotBuild Server message: Build round completed after 1599 seconds.
01:39:40rb-bluebotBuild Server message: Revision 01e76548c3 result: All green
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02:01:40 Quit braewoods (Quit: WeeChat 2.8)
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03:18:36_bilgus___aeabi_idiv is related to the ARM crash
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04:25:00 Quit Malinux (Ping timeout: 240 seconds)
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04:43:25 Quit melmothX (Quit: WeeChat 3.0)
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05:06:13 Join melmothX [0] (~marco@amusewiki/marco)
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08:02:31braewoods_bilgus_: division by zero?
08:02:44braewoodsthat's the only thing i can think of
08:03:04braewoodsassuming it was division error and not another logic error
08:35:41_bilgus_braewoods, its a hand tuned asm loop to generate reciprocal and use multiplication to divide
08:36:01_bilgus_https://github.com/Rockbox/rockbox/blob/master/lib/arm_support/support-arm.S
08:37:55_bilgus_dumping the the gcc version in there fixes it but even without the test for 0 its so much slower I'd prefer the crashing
08:40:35_bilgus_i'm guessing there is some assumption that Os breaks for the code, and I was able to work around it by doing the division at compile time of usec/tick but now I think it might be the issue with fuze V2? V1?
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08:57:40 Join massiveH [0] (~massiveH@ool-4a5862ee.dyn.optonline.net)
09:00
09:25:15braewoods_bilgus_: oh, that old trick for dividing by a constant integer? thought that should never trigger a division by zero.
09:26:06_bilgus_there is no div by 0
09:28:08_bilgus_its crashing on a data abort after Os
09:30:38_bilgus_AFAIAA optimizations shouldn't affect ASM so its probably something with a bad (disallowed) register is current my guess i'll have to wade through the generated ASM
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10:36:40 Quit massiveH (Quit: Leaving)
10:44:54_bilgus_forcing unsigned fixes it so I guess that gives me some hope
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12:57:19 Join ZincAlloy [0] (~Adium@2a02:8108:943f:d824:d5c8:589a:7346:79f7)
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13:02:48rb-bluebotBuild Server message: New build round started. Revision 57cffae369, 303 builds, 9 clients.
13:17:19rb-bluebotBuild Server message: Build round completed after 871 seconds.
13:17:23rb-bluebotBuild Server message: Revision 57cffae369 result: 1 errors 0 warnings
13:33:13 Join lebellium [0] (~lebellium@2a01cb04012c090095e088e99ff73ea7.ipv6.abo.wanadoo.fr)
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15:03:54 Quit munkis (Remote host closed the connection)
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16:18:50 Quit akaWolf (Read error: Connection reset by peer)
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16:59:29_bilgus_hmm upon further experimenting it seems to be due to the interrupt, wonder if there is an op that doesn't like interrupts
17:00
17:01:33_bilgus_reproducer: https://pastebin.com/qTacgFrw
17:02:29_bilgus_I'm guessing this is all arm v6 not sure about the lesser versions
17:33:56 Quit lebellium (Quit: Leaving)
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19:35:32 Join archpc2 [0] (~archpc@user/archpc)
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22:02:15_bilgus_Well I've figured it out I just don't know the 'WHY'
22:30:21_bilgus_well still don't know the WHY but the equivalent instructions work great :) so fixed.
22:32:57_bilgus_and spoke too soon :/
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