From:	buers AT gmx DOT de (Dieter Buerssner)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: I need to advice on timing...
Date:	31 Jan 2000 20:05:40 GMT
Lines:	23
Message-ID:	<874puj$3d1nd$1@fu-berlin.de>
References:	<F77915E7F086D31197F4009027CC81C921A6A0 AT probe-2 DOT as-london DOT acclaim DOT com>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

djgpp AT delorie DOT com (Shawn Hargreaves) wrote in 
<F77915E7F086D31197F4009027CC81C921A6A0 AT probe-2 DOT as-london DOT acclaim DOT com>:

>[linux delay loop for almost exact fast timing]
>[...] hence the forced jump instructions at the start 

Could you please explain, why you need these jump instructions.
I donīt get it.

>     void __delay(unsigned long loops)
>     {
>             int d0;
>             __asm__ __volatile__(
>                     "\tjmp 1f\n"
>                     ".align 16\n"
>                     "1:\tjmp 2f\n"
>                     ".align 16\n"
>                     "2:\tdecl %0\n\tjns 2b"
>                     :"=&a" (d0)
>                     :"0" (loops));
>     }

Dieter

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