On Fri, Apr 12, 2013 at 10:10:45AM +0200, Marc Glisse wrote:
> unsigned_p changes the computation of the high part of the product:
> it returns early for unsigned products and adjusts the high part
> later for signed. overflow_dummy looks good. I don't remember
> exactly, but I think the overflow p
On Fri, 12 Apr 2013, Jakub Jelinek wrote:
On Thu, Apr 11, 2013 at 09:13:17PM +0200, Marc Glisse wrote:
The comments on PREC in the rshift function really confused me.
Yeah, me too. But if count == prec, the code always:
/* Zero / sign extend all bits that are beyond the precision. */
if
On Fri, 12 Apr 2013, Jakub Jelinek wrote:
> On Thu, Apr 11, 2013 at 09:13:17PM +0200, Marc Glisse wrote:
> > On Thu, 11 Apr 2013, Jakub Jelinek wrote:
> >
> > >The op1 - op2 line instead of multiplication is something that has been
> > >introduced in C++ double_int changes, but without the 2 * TY
On Thu, Apr 11, 2013 at 09:13:17PM +0200, Marc Glisse wrote:
> On Thu, 11 Apr 2013, Jakub Jelinek wrote:
>
> >The op1 - op2 line instead of multiplication is something that has been
> >introduced in C++ double_int changes, but without the 2 * TYPE_PRECISION
> >prec it would always return 0 or -1 a
On Thu, 11 Apr 2013, Jakub Jelinek wrote:
The op1 - op2 line instead of multiplication is something that has been
introduced in C++ double_int changes, but without the 2 * TYPE_PRECISION
prec it would always return 0 or -1 anyway.
The comments on PREC in the rshift function really confused me.
Hi!
The op1 - op2 line instead of multiplication is something that has been
introduced in C++ double_int changes, but without the 2 * TYPE_PRECISION
prec it would always return 0 or -1 anyway. And, with wide_mul_with_sign
we can also handle 2 * HOST_BITS_PER_WIDE_INT precisions.
Bootstrapped/reg
