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From: CBFalconer <cbfalconer AT yahoo DOT com>
Organization: Ched Research
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: Question about djgpp's int-wrapper
References: <5 DOT 0 DOT 2 DOT 1 DOT 2 DOT 20020608134608 DOT 009e4050 AT pop DOT gmx DOT net> <96eb2770 DOT 0206102144 DOT 74a87c25 AT posting DOT google DOT com>
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Date: Tue, 11 Jun 2002 08:20:39 GMT
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To: djgpp AT delorie DOT com
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Alex Yeryomin wrote:
> 
... snip ...
> 
> -------------------------------------------
> [BITS 32]
> [GLOBAL _Read_TSC]
> [SECTION .text]
> _Read_TSC:
>         mov ecx, [esp+4]
>         rdtsc
>         mov [ecx], eax
>         mov [ecx+4], edx
>         ret
> ;_Read_TSC
> -------------------------------------------
> typedef unsigned long long int TICK;
> extern void Read_TSC (TICK *tick);
> -------------------------------------------

You need to do some guarding.  rdtsc will immediately crash a '486
as an illegal instruction.

-- 
Chuck F (cbfalconer AT yahoo DOT com) (cbfalconer AT worldnet DOT att DOT net)
   Available for consulting/temporary embedded and systems.
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