Re: kern/58598: FP event message displayed on NetBSD-10.0/alpha

[gnats-admin%netbsd.org@localhost]

The following reply was made to PR kern/58598; it has been noted by GNATS.

From: Jason Thorpe <thorpej%me.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/58598: FP event message displayed on NetBSD-10.0/alpha
Date: Wed, 14 Aug 2024 18:48:26 -0700

 > On Aug 14, 2024, at 5:35=E2=80=AFPM, isaki%pastel-flower.jp@localhost wrote:
 >=20
 > [ 20365.740908] FP instruction 5c420422
 > [ 20365.754956] FP event 3/8/800000
 > [ 20365.767463] Please report this to port-alpha-maintainer%NetBSD.org@localhost
 
 Well this is annoying.  There are two places that use the =E2=80=9C3=E2=80=
 =9D what-can=E2=80=99t-happen code.  Grumble.  WHO WROTE THAT STUFF =
 ANYWAY?  (Heh, it was Ross, actually.)
 
 Luckily, we have the instruction bits.
 
 Looks like that=E2=80=99s:
 
 	opcode=3D23, displacement=3D1058, ra=3D2, rb=3D2
 
 =E2=80=A6which would be:
 
 	ldt	f2,1058(t1)
 
 ?
 
 That doesn=E2=80=99t make any sense, actually.  Ok, I=E2=80=99ve =
 probably decoded that wrong.  I=E2=80=99ll take another look later.
 
 -- thorpej