Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c++
Subject: Re: constexpr is really very smart!
Date: Sun, 22 Dec 2024 02:22:14 +0200
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On Sat, 21 Dec 2024 17:55:20 -0500
James Kuyper <jameskuyper@alumni.caltech.edu> wrote:

> On 12/21/24 17:14, Michael S wrote:
> > On Fri, 20 Dec 2024 14:31:54 -0800
> > Tim Rentsch <tr.17687@z991.linuxsc.com> wrote:
> >  
> >> Thank you for that. Sadly I am not able to run it because my
> >> test environment is lacking _rdtsc(), and I haven't been able
> >> to find out how to install it.
> >>  
> >
> > Any x86-64 Linux should have _rdtsc() as inline function (or
> > built-in) defined in x86intrin.h. No installation required.  
> 
> On my x86-64 Linux system, that header (indirectly) declares
> __rdtsc(), but not _rdtsc.
> 
> 

Thank you.
I'd guess I knew it once, but  because I don't run microbenchmark on
Linux all that often, had forgotten.