On 04/07/18 10:26 +0200, Jakub Jelinek wrote:
On Wed, Jul 04, 2018 at 09:14:04AM +0100, Jonathan Wakely wrote:
> Unfortunately it is not correct if _Nd is not power of two.
> E.g. for __sN 1, -1U % 20 is 15, not 19.
> So it would need to be
> return (__x << __sN) | (__x >> ((_Nd - __sN) % _
On Wed, Jul 04, 2018 at 09:14:04AM +0100, Jonathan Wakely wrote:
> > Unfortunately it is not correct if _Nd is not power of two.
> > E.g. for __sN 1, -1U % 20 is 15, not 19.
> > So it would need to be
> > return (__x << __sN) | (__x >> ((_Nd - __sN) % _Nd));
> > Unfortunately, our rotate patte
On 04/07/18 10:09 +0200, Jakub Jelinek wrote:
On Tue, Jul 03, 2018 at 11:24:00PM +0100, Jonathan Wakely wrote:
> Wouldn't it be better to use some branchless pattern that
> GCC can also optimize well, like:
> return (__x << __sN) | (__x >> ((-_sN) & (_Nd - 1)));
> (iff _Nd is always power o
On Tue, Jul 03, 2018 at 11:24:00PM +0100, Jonathan Wakely wrote:
> > Wouldn't it be better to use some branchless pattern that
> > GCC can also optimize well, like:
> > return (__x << __sN) | (__x >> ((-_sN) & (_Nd - 1)));
> > (iff _Nd is always power of two),
>
> _Nd is 20 for one of the INT
On 03/07/18 23:23 +0100, Jonathan Wakely wrote:
On 03/07/18 23:40 +0200, Jakub Jelinek wrote:
On Tue, Jul 03, 2018 at 10:02:47PM +0100, Jonathan Wakely wrote:
+#ifndef _GLIBCXX_BIT
+#define _GLIBCXX_BIT 1
+
+#pragma GCC system_header
+
+#if __cplusplus >= 201402L
+
+#include
+#include
+
+name
On 03/07/18 23:40 +0200, Jakub Jelinek wrote:
On Tue, Jul 03, 2018 at 10:02:47PM +0100, Jonathan Wakely wrote:
+#ifndef _GLIBCXX_BIT
+#define _GLIBCXX_BIT 1
+
+#pragma GCC system_header
+
+#if __cplusplus >= 201402L
+
+#include
+#include
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBC
On Tue, Jul 03, 2018 at 10:02:47PM +0100, Jonathan Wakely wrote:
> +#ifndef _GLIBCXX_BIT
> +#define _GLIBCXX_BIT 1
> +
> +#pragma GCC system_header
> +
> +#if __cplusplus >= 201402L
> +
> +#include
> +#include
> +
> +namespace std _GLIBCXX_VISIBILITY(default)
> +{
> +_GLIBCXX_BEGIN_NAMESPACE_VERS
P0553R2 is not in the C++2a working draft yet, but is likely to be
approved soon. Neither proposal supports std::byte but this adds
overloads of each function for std::byte, assuming that will also get
added.
* include/Makefile.am: Add new header.
* include/Makefile.in: Regenerate
