On Fri, Mar 4, 2016 at 3:05 PM, Søren Sandmann <soren.sandm...@gmail.com> wrote:
> On Wed, Feb 10, 2016 at 1:25 AM, <spit...@gmail.com> wrote: > >> From: Bill Spitzak <spit...@gmail.com> >> >> v11: Restored range checks >> >> Signed-off-by: Bill Spitzak <spit...@gmail.com> >> Reviewed-by: Oded Gabbay <oded.gab...@gmail.com> >> > > What's the point of this? All this does is putting ax^2 outside of the > parenthesis? > Nested form reduces the number of multiplications (from 23 to 18 in this case), without changing how many additions are done. And compilers can take advantage of ax+b instructions with this (I did not check if that actually happened, however).
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