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Re: builtin_bswap plus enhancements


Andrew Pinski <pinskia@physics.uc.edu> writes:

> > > Index: gcc/testsuite/gcc.dg/builtin-bswap-1.c
> > > ===================================================================
> > > --- gcc/testsuite/gcc.dg/builtin-bswap-1.c	(revision 0)
> > > +++ gcc/testsuite/gcc.dg/builtin-bswap-1.c	(revision 0)
> > > @@ -0,0 +1,14 @@
> > > +/* { dg-do compile } */
> > > +/* { dg-options "" } */
> > > +/* { dg-final { scan-assembler-not "__builtin_" } } */
> > > +
> > > +#include <stdint.h>
> > > +
> > > +uint32_t foo (uint32_t a)
> > > +{
> > > +  int b;
> > > +
> > > +  b = __builtin_bswap32 (a);
> > > +
> > > +  return b;
> > > +}
> > 
> > Is this test really going to pass on a processor which does not
> > support a byte swap instruction?  I must be missing something.
> 
> Yes because the call would to be __bswapsi and not to the builtin name.

Oh yeah.  Thanks.

Ian


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