[PATCH] bitops: remove condition code clobber for CLZ

[Nicolas Pitre]

On Tue, 11 Jan 2011, Russell King - ARM Linux wrote:

> On Tue, Jan 11, 2011 at 11:12:05PM +0530, Rabin Vincent wrote:
> > The CLZ instruction does not alter the condition flags, so remove the
> > "cc" clobber from the inline asm for fls().
> 
> Do you have any evidence that this changes anything, or is it just
> subjective?

This probably doesn't change anything, as gcc has been presuming that 
inline asms do clobber the condition code for years now, in order to 
prevent issues caused by a lack of %? appended to instructions in order 
to conditionally execute them otherwise.  So this would only make the 
code self consistent.


Nicolas