Date: Thu, 27 Jul 2000 23:36:39 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: "Andrei A. Dergatchev" <A.Dergatchev@tn.utwente.nl> Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: Using the Compaq Math lib natively Message-ID: <14720.65044.753276.107696@grasshopper.cs.duke.edu> In-Reply-To: <39805BB4.9BB8A1F8@tn.utwente.nl> References: <14720.19316.592646.531221@grasshopper.cs.duke.edu> <39805BB4.9BB8A1F8@tn.utwente.nl>
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Andrei A. Dergatchev writes:
> Digital' docs is the most useful thing I found - pretty detailed description of
> ieee_get_fp_control:
>
Thanks.. This is the OSF/1 definition, but seems to agree with what I
found in the linux header files.
> errno_location seems to be LinuxThreads thing - couldn't find anything
> in onlne DEC documents.
I've emperically determined this is just a pointer to errno.
The following wrapper should allow you to use the static version
of the cpml:
/* ------ cut here ---------------------------- */
#include <sys/types.h>
#include <math.h>
#include <errno.h>
u_int64_t
__ieee_get_fp_control(void)
{
return fpgetmask();
}
int *
__errno_location(void)
{
return &errno;
}
/* ------ cut here ---------------------------- */
BTW, I'm typing this from an native FreeBSD/alpha X server linked with
the cpml ;-) It seems to be faster than it used to be when linked
with the native libm.
Drew
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