Adrian Bunk wrote:
> The gcc from svn that will become gcc 4.3 generates libgcc calls in
> cases like the following (on 32bit architectures):
>
> <-- snip -->
>
> static inline void timespec_add_ns(struct timespec *a, u64 ns)
> {
> ...
> while(ns >= NSEC_PER_SEC) {
> ns -= NSEC_PER_SEC;
> a->tv_sec++;
> }
> ...
>
> <-- snip -->
>
> It can make sense to emit assembler code doing division for such C code -
> that doesn't seem to be something that would generally be wrong.
It can be a pretty huge performance regression, so gcc ought to be fixed.
Bernd
--
This footer brought to you by insane German lawmakers.
Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen
Sitz der Gesellschaft Muenchen, Registergericht Muenchen HRB 40368
Geschaeftsfuehrer Thomas Wessel, William A. Martin, Margaret Seif
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
