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Re: MATH_EMULATE




To: "Perry E. Metzger" <perry%piermont.com@localhost>

Subject: Re: MATH_EMULATE

From: Vit Herman <v.herman%sh.cvut.cz@localhost>

Date: Tue, 15 Jan 2008 19:46:13 +0100 (CET)


On Tue, 15 Jan 2008, Perry E. Metzger wrote:


It rotted once, didn't it?


Yes, but it was my understanding
 that it was a bit different kind of  rotting :) I mean, it has rotten because nobody realized that inlining of  FPU ops could break something - but it did. In the case of special build  which differs only by the fact that it's built with -msoft-float, this  shouldn't happen. Other kinds of rotting (non-FPU related) should affect  486 DX as well, no?


An operating system project like NetBSD gets many thousands of changes
a year. Every once in a while, something bumps something
unintentionally. Apparently part of what happened here, for instance,
was a compile option got dropped during the a.out to ELF transition
years ago. When things get knocked into, they break, and if nothing is
making sure that they still work, they stop working.


Yes, I know, but putting this co
mpile option back is the whole point of  all this, right? As I wrote before, other kinds of rotting should affect  486DX as well (for which nobody wants to drop support, right?).


-current would be the real target here since that's what would get
fixed for the SX. I presume it fails like 4.0 does -- we would want to
figure out why.


Just tried, all the same, restar
t right after loading the kernel. I'm not  sure it's 486SX specific - the machine in question is IBM PS/ValuePoint  which I suspect could be the root of evil here. I could try with some more  "normal" 486SX tomorow.

Vit Herman



Follow-Ups:

Re: MATH_EMULATE
From: Perry E. Metzger


References:

MATH_EMULATE
From: Andrew Doran

Re: MATH_EMULATE
From: Perry E. Metzger

Re: MATH_EMULATE
From: Jared D. McNeill

Re: MATH_EMULATE
From: Perry E. Metzger

Re: MATH_EMULATE
From: Jared D. McNeill

Re: MATH_EMULATE
From: Perry E. Metzger

Re: MATH_EMULATE
From: Pierre Dubuc

Re: MATH_EMULATE
From: Vit Herman

Re: MATH_EMULATE
From: Matthias Drochner

Re: MATH_EMULATE
From: Perry E. Metzger

Re: MATH_EMULATE
From: der Mouse

Re: MATH_EMULATE
From: Perry E. Metzger

Re: MATH_EMULATE
From: Vit Herman

Re: MATH_EMULATE
From: Perry E. Metzger




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