Re: [PATCH] Improved trailing bit counting operation

[Daniel Gutson <dgutson at codesourcery dot com>]

Adam,
  could you please elaborate?

Thanks,
  Daniel.

Adam Nemet wrote:
> Daniel Gutson <dgutson@codesourcery.com> writes:
> > Index: src/gcc-mainline/gcc/testsuite/gcc.target/arm/ctz.c
> > ===================================================================
> > --- src/gcc-mainline/gcc/testsuite/gcc.target/arm/ctz.c	(revision 0)
> > +++ src/gcc-mainline/gcc/testsuite/gcc.target/arm/ctz.c	(revision 0)
> > @@ -0,0 +1,12 @@
> > +/* { dg-do compile } */
> > +/* { dg-require-effective-target arm32 } */
> > +/* { dg-options "-O2 -march=armv6t2" } */
> > +
> > +unsigned int functest(unsigned int x)
> > +{
> > +	return __builtin_ctz(x);
> > +}
> > +
> > +/* { dg-final { scan-assembler "rbit" } } */
> > +/* { dg-final { scan-assembler "ctz" } } */
>
> Watch out, this will match the .file directive.
>
> Adam

--
Daniel Gutson
CodeSourcery
www.codesourcery.com