i586 instructions on Cyrix 686 and AMD K5 processors

  • Thread starter Thread starter Mark Hobley
  • Start date Start date
M

Mark Hobley

Can anyone tell me if the following instructions are supported on the
AMD K5 and the original Cyrix 686 processors?

cmpxchg8b
rdmsr
rdtsc
rsm
wrmsr

Mark.
 
Mark said:
Can anyone tell me if the following instructions are supported on the
AMD K5 and the original Cyrix 686 processors?

cmpxchg8b
rdmsr
rdtsc
rsm
wrmsr
Click to expand...


Check out the CPUID instruction, that will give you all you need to know
about which instructions come with what. If the CPUID instruction itself
is not supported, then you can only think of the processor as 486-class
or lower.

Yousuf Khan
 
Yousuf Khan said:
Check out the CPUID instruction, that will give you all you need to know
about which instructions come with what.
Click to expand...

Thanks. But unfortunately, it only tells me about the machine that I run
in on. I am working on some documentation and making some kernel bug fixes
for such machines and I need accurate information about the presence or
absence of those specific instructions on various Cyrix 686 and AMD K5
and K6 series processors.

Mark.
 
Thanks. But unfortunately, it only tells me about the machine that I run
in on. I am working on some documentation and making some kernel bug fixes
for such machines and I need accurate information about the presence or
absence of those specific instructions on various Cyrix 686 and AMD K5
and K6 series processors.

Mark.
Click to expand...

Try here:
x86 - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/X86
 
Mark said:
Yeah. Unfortunately that information is not entirely accurate. The
Wikipedia table is one of the articles that I am working on. :-P

Cheers,

Mark.
Click to expand...

There was a website called sandpile.org or something like that. Had a
lot of info on older x86 processors.

Yousuf Khan
 
Yousuf Khan said:
There was a website called sandpile.org or something like that. Had a
lot of info on older x86 processors.
Click to expand...

Yeah. I've been there too. Unfortunately, the links to the programmers
reference manuals that I require do not work.

Mark.
 
Yeah. I've been there too. Unfortunately, the links to the programmers
reference manuals that I require do not work.

Mark.
Click to expand...

Can you tell us which document numbers you need? I have some old AMD
CD-ROMs that may have this information. Not sure about Cyrix, though.

- Franc Zabkar
 
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