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Message-ID: | <3D10BE94.A64FFFAD@cyberoptics.com> |
Date: | Wed, 19 Jun 2002 12:25:40 -0500 |
From: | Eric Rudd <rudd AT cyberoptics DOT com> |
Organization: | CyberOptics |
X-Mailer: | Mozilla 4.72 [en] (Win95; U) |
X-Accept-Language: | en,pdf |
MIME-Version: | 1.0 |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Need help for rdtsc inline asm |
References: | <ugv5asq8muh79d AT corp DOT supernews DOT com> |
Lines: | 25 |
NNTP-Posting-Host: | 65.214.97.102 |
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To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
billy chen wrote: > I try to write an inline asm code for getting the time stamp counter a 64 bits > will store at edx:eax when rdtsc is called. Try this little snippet, which you can customize to your liking: unsigned long long pentimer(int mode) { static unsigned long long tref; unsigned long long time; asm volatile("rdtsc # rdtsc" : "=A" (time) ); if (mode == 0) { tref = time; return 0.; } else { return time - tref; } } -Eric Rudd rudd AT cyberoptics DOT com
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