Linus,
First ia64 change is sitting in a GIT repository at:
http://www.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6.git
Please pull (and comment if anything is wrong, or could be improved ... e.g.
what's the easiest way to name the repository for you to cut&paste?)
-Tony
Diffstat:
include/asm-ia64/bitops.h | 21 +++++++++++++++++----
include/asm-ia64/gcc_intrin.h | 10 +++++++---
2 files changed, 24 insertions(+), 7 deletions(-)
Changesets:
tree 2179380ee3eb38fb393719e6ce32b15e934c4a44
parent d8470b7c13e11c18cf14a7e3180f0b00e715e4f0
author David Mosberger-Tang <[EMAIL PROTECTED]> 1114106879 -0700
committer Tony Luck <[EMAIL PROTECTED]> 1114106879 -0700
[IA64] fix fls()
The ia64-version of fls() never worked as intended (the bitnumbering
was off by 1 and fls(0) was undefined). This patch fixes the problem
by using a popcnt-based fls(), which on McKinley-derived cores is
slightly faster than both ia64_fls() and generic_fls(). The resulting
code, however, is bigger (7-8 bundles instead of about 3 bundles).
Also switch ia64_popcnt() to __builtin_popcountl() for GCC v3.4 or
newer since the compiler can predicate that and schedule it better.
Thanks to Simon Derr and Matt Mackall for tracking down this bug.
Signed-off-by: David Mosberger-Tang <[EMAIL PROTECTED]>
Signed-off-by: Tony Luck <[EMAIL PROTECTED]>
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