Thursday, 2020-05-14

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tux3ERROR: Found error in internal cell \top.$auto$alumacc.cc:485:replace_alu$13245.A_conv ($pos) at kernel/rtlil.cc:86723:18
tux3Does that look like something I should bother reducing/reporting, or just my code being exceptionally dodgy :/ ?23:18
az0reYes, please!23:21
ZirconiumXThat's a bug, so report it23:21
ZirconiumXEspecially since it seems to come from alumacc.23:21
ZirconiumXThere's bugpoint if you want to lazily reduce it.23:22
az0reSome sort of port width mismatch?23:22
ZirconiumXWe'd have to see the cell dump to tell23:25
tux3Hhm I can't get bugpoint to do anything, I just get things like "Cannot reprocess_module" or "Module is used with parameters but is not parametric!"23:37
tux3Maybe the last few lines of the Yosys log have something interesting in them, while I fight bugpoint: https://paste.debian.net/1146837/23:41
tpbTitle: debian Pastezone (at paste.debian.net)23:41
tux3(Note the crossbar I stole from https://github.com/ZipCPU/wb2axip/)23:41
tpbTitle: GitHub - ZipCPU/wb2axip: Bus bridges and other odds and ends (at github.com)23:41
ZipCPUtux3: Which bus?  How many masters?  How many slaves?23:42
tux3Axi4-lite, 2 masters, "2 slaves" only one of which is not hardwired to zero23:43
ZipCPUYou can't hardwire a slave to zero--it's a protocol violation.  Just leave the address unmapped instead.23:43
tux3Oh. It's a violation if it's just never ready?23:44
ZipCPUYes.  It'll cause the whole bus to collapse if it's ever accessed23:44
tux3Oh right, I'm planning to add something on the other side of that bus, I was just in between two commits =]23:45
ZipCPUIf you don't map the address in in SLAVE_ADDR/SLAVE_MASK, then it'll never get accessed and a bus error will be returned instead23:45
tux3Makes sense23:45
ZipCPUDon't know about any yosys bug when using it though.  Haven't had a problem with it.  (Yet)23:47
mwk... hmmm23:50
mwkwhy is that an error23:54
mwktux3: what version of yosys are you using?23:57
tux3master23:58
tux3It worked a few days ago actually, I've started a bisect23:58
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