* [RFC] Vector extentions for vprintf/vscanf
@ 2004-01-19 22:46 Steve Munroe
2004-01-20 0:19 ` Richard Henderson
2004-01-20 3:38 ` Ulrich Drepper
0 siblings, 2 replies; 3+ messages in thread
From: Steve Munroe @ 2004-01-19 22:46 UTC (permalink / raw)
To: libc-hacker, Tom Gall, Andreas Jaeger; +Cc: Segher Boessenkoof, Hartmut Penner
A number of platforms support Vector (SIMD) extentions that support with
types and builtins in gcc. This includes i386 MMX, 3Dnow!, SSE, SSE2,
PowerPC 32 (and now PowerPC64) Altivec/VMX.
One useful extention to glibc would be adding vector formating to
printf/scanf. This would add the type modifier prefix v to the type
modifiers hh, h, l. For example to print a vector of 16 signed bytes
"%vhhd", 8 signed shorts "%vhd", 4 signed ints "%vd", or 4 floats
"%vhf". (note the form "%vf" is reserved for a vector of 2 doubles but
most current Vector SIMD implimentations don't support double float).
We would be happy to provide the supporting patches and documentation if
there is interrest.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [RFC] Vector extentions for vprintf/vscanf
2004-01-19 22:46 [RFC] Vector extentions for vprintf/vscanf Steve Munroe
@ 2004-01-20 0:19 ` Richard Henderson
2004-01-20 3:38 ` Ulrich Drepper
1 sibling, 0 replies; 3+ messages in thread
From: Richard Henderson @ 2004-01-20 0:19 UTC (permalink / raw)
To: sjmunroe
Cc: libc-hacker, Tom Gall, Andreas Jaeger, Segher Boessenkoof,
Hartmut Penner
On Mon, Jan 19, 2004 at 04:44:08PM -0600, Steve Munroe wrote:
> One useful extention to glibc would be adding vector formating to
> printf/scanf. This would add the type modifier prefix v to the type
> modifiers hh, h, l. For example to print a vector of 16 signed bytes
> "%vhhd", 8 signed shorts "%vhd", 4 signed ints "%vd", or 4 floats
> "%vhf". (note the form "%vf" is reserved for a vector of 2 doubles but
> most current Vector SIMD implimentations don't support double float).
Are you going to hard-code the width of the vector? That's not
friendly for x86, where there are two sizes.
r~
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [RFC] Vector extentions for vprintf/vscanf
2004-01-19 22:46 [RFC] Vector extentions for vprintf/vscanf Steve Munroe
2004-01-20 0:19 ` Richard Henderson
@ 2004-01-20 3:38 ` Ulrich Drepper
1 sibling, 0 replies; 3+ messages in thread
From: Ulrich Drepper @ 2004-01-20 3:38 UTC (permalink / raw)
To: sjmunroe; +Cc: libc-hacker
Steve Munroe wrote:
> One useful extention to glibc would be adding vector formating to
> printf/scanf.
Never. Write your printf handlers, put them in a separate library, and
register them using the interface in <printf.h>.
--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA â–
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-01-20 3:38 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-01-19 22:46 [RFC] Vector extentions for vprintf/vscanf Steve Munroe
2004-01-20 0:19 ` Richard Henderson
2004-01-20 3:38 ` Ulrich Drepper
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).