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Date:      Sun, 19 Nov 2000 03:41:15 +1100 (EST)
From:      Bruce Evans <bde@zeta.org.au>
To:        John Baldwin <jhb@FreeBSD.ORG>
Cc:        Mark Murray <mark@grondar.za>, arch@FreeBSD.ORG
Subject:   RE: new monotime() call for all architectures.
Message-ID:  <Pine.BSF.4.21.0011190322240.394-100000@besplex.bde.org>
In-Reply-To: <XFMail.001117103013.jhb@FreeBSD.org>

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On Fri, 17 Nov 2000, John Baldwin wrote:

> Please use existing functions like rdtsc() instead of duplicating the inline
> assembly.  This will help reduce maintenance down the road.

Yes.

> In fact, you might
> want to move this to machine/cpufunc.h instead of machine/clock.h.

No!  machine/cpufunc.h is for "Functions to provide access to special cpu
instructions", not for functions that happen to call a (primitive) function
in cpufunc.h.

> Then use
> the rdtsc() function for x86, alpha_rpcc() for the alpha, and ia64_get_itc()
> for ia64.  Note that for ia64, machine/cpufunc.h needs to be fixed to #include
> machine/ia64_cpu.h as it does on the alpha.

This seems to be a bug in the alpha version.  cpufunc.h is spelled
alpha_cpu.h in NetBSD.  FreeBSD obtained this spelling from NetBSD and
attached a few extras in cpufunc.h.  There doesn't seem to be any reason
to have separate files.

Bruce



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