[PATCH v4 1/2] stdlib: Add internal stdc_rotate_right implementation

[Joseph Myers]

On Tue, 31 Mar 2026, Adhemerval Zanella Netto wrote:

> On 31/03/26 15:26, Joseph Myers wrote:
> > On Tue, 31 Mar 2026, Adhemerval Zanella wrote:
> > 
> >> It follows the C2y N3367 proposed interface, along with some tests
> >> imported from gnulib (and adapted to glibc libsupport).
> >>
> >> Checked on x86_64-linux-gnu and i686-linux-gnu.
> >> ---
> >>  include/stdbit.h               |  68 +++++
> > 
> > It seems odd to put this in the internal header rather than the installed 
> > header (conditional on __GLIBC_USE (ISOC2Y)) and corresponding public 
> > ABIs.
> > 
> 
> Because the idea of this patch is to make it easier to integrate the
> gnulib code, which aim to use its std_rotate_right instead of its old
> bitrotate.h; and I do not want to commit to full C2y N3367 implementation
> now.

I think it would be reasonable to add the rotate operations separately 
from the endian-aware load/store operations, even though they were added 
to C2y at the same time.

-- 
Joseph S. Myers
josmyers@redhat.com