On 05/20/2017 12:07 AM, Nikolay Nikolov wrote:
On 05/19/2017 11:24 PM, Sven Barth via fpc-pascal wrote:
On 19.05.2017 19:22, Karoly Balogh (Charlie/SGR) wrote:
Hi,
On Fri, 19 May 2017, Sven Barth via fpc-pascal wrote:
I think Jeppe wanted to add vector support. Though the question
here is
whether one wants to optimize/detect this at the AST level and convert
that to implicit vectors or at the CSE level.
I think the higher level you can do an optimization/simplification, the
higher you should do it. Otherwise the lower layers get really
messy, as
they already are in some cases. Well, in general, we should up our
floating point game. For example if Nikolay's recent load-modify-store
optimization would work on floats, that would already a nice step
forward
in this case. ;) (Sorry for my ignorance, if it already works,
missed that
then.)
No, it does not work for floats, yet, but feel free to add support for
them as well :)
Today, I checked whether we can take advantage of this optimization for
floats, but I didn't see any load-modify-store instructions in the x86
instruction set (neither x87, nor SSE/AVX). Are there any floating point
instructions on any architecture, that we support, that does
load-modify-store (i.e. modify-in-place) of a memory operand?
Nikolay
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