Ok, so, I've tried making reduc_plus optab take two modes: that of the vector to
reduce, and the result; thus allowing platforms to provide a widening reduction.
However, I'm keeping reduc_[us](min|max)_optab with only a single mode, as
widening makes no sense there.
I've not gone as far as ma
On Thu, Sep 25, 2014 at 4:32 PM, Alan Lawrence wrote:
> Ok, so, I've tried making reduc_plus optab take two modes: that of the
> vector to reduce, and the result; thus allowing platforms to provide a
> widening reduction. However, I'm keeping reduc_[us](min|max)_optab with only
> a single mode, as
Well, even that C source, you'd need to be careful and ensure that the
vectorized loop never went round more than once, or else the additions within
the loop would be performed in 8 bits, different from the final reduction...
So: original patch with updated commenting attached...Segher, is ther
On Thu, Sep 25, 2014 at 05:12:24PM +0100, Alan Lawrence wrote:
> So: original patch with updated commenting attached...Segher, is there any
> chance you could test this on powerpc too? (in combination with patch 2/14,
> which will need to be applied first; you can skip patch 1, and >=4.)
2+3/14,
