Displaying 5 results from an estimated 5 matches for "pentium1".
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pentium
2019 Jul 21
2
Altering the return address , for a function with multiple return paths
...(in which case
it did the jmp retpc+2).
While this seems like a clever and efficient hack, it actually has an
absolutely awful effect on performance, due to the unpaired call vs return,
and the unexpected return address.
SBCL stopped doing this in 2006, a decade later than it should've -- the
Pentium1 MMX from 1997 already had a hardware return stack which made this
a really bad idea!
What it does now is have the called function set or clear the carry flag
(using STC and CLC) immediately before the return. If the caller cares,
then the caller emits JNC as the first instruction after the call. (...
2004 Oct 06
2
Call Quality
Hi
I am having a problem with voice quality getting
bad after about 10-15 minutes on a call. The call
starts out fine but gets very chopy after 10-15 minutes.
It seems like a buffer problem, I am using Asterisk with
a Voicetronix Openlin4 card.
Could someone shed some light on this?
2012 Oct 08
2
What to configure for a guest with 2.2. kernel ...
Greetings, libvirt-users ...
I ask for help with virtualizing an ancient machine with a linux kernel 2.2.
I already succeeded doing that but I face random performance issues and
I somehow get lost in all the settings and options.
I am using Virtual Machine Manager:
* I can't chose something like Linux for the OS and 2.2 for the kernel.
Does the combination "linux/2.4 kernel"
2019 Jul 24
2
Altering the return address , for a function with multiple return paths
...like a clever and efficient hack, it actually has an
> absolutely awful effect on performance, due to the unpaired call
> vs return,
> and the unexpected return address.
>
> SBCL stopped doing this in 2006, a decade later than it should've
> -- the
> Pentium1 MMX from 1997 already had a hardware return stack which
> made this
> a really bad idea!
>
> What it does now is have the called function set or clear the
> carry flag
> (using STC and CLC) immediately before the return. If the caller
> cares,
> t...
2019 Jul 21
4
Altering the return address , for a function with multiple return paths
Playing around with calling conventions naked functions and
epilogue/prologue...
Is it possible/expressible/feasible to alter the return address the
function will return to?
For example, when a function may return an Int8 or a Float64, depending on
some external state
(user, or random variable), instead of checking the returned type in the
calling function, is it possible
to pass 2 potential