Prepare for a lot of technical rambling!
This is just an analysis of the compilation of utf8lentest.lpr, not any
of the System units. Notably, POPCNT isn't called directly, but instead
goes through the System unit via "call fpc_popcnt_qword" on both 3.2.x
and 3.3.1. A future study of
Interesting - thank you. Will be interesting to study the assembler
output to see what's going on.
I'm honoured that I've become the go-to person when optimisation is
concerned!
Gareth aka. Kit
On 03/01/2022 11:54, Martin Frb via fpc-devel wrote:
Hi Gareth,
not sure if this is of
On 3-1-2022 12:54, Martin Frb via fpc-devel wrote:
fpc 3.2.3 / fpc 3.3.1
fst 594 fst 688
fst 578 fst 703
fst 578 fst 687
fst 562 fst 688
Fyi, the latest asm version (+fst/pop/add/naieve) is at
http://www.stack.nl/~marcov/utf8lentest.lpr
Hi Gareth,
not sure if this is of interest to you, but I see you do a lot on the
optimizer
While testing the attached, I found that one of the functions was
notable slower when compiled with 3.3.1 (compared to 3.2.3).
So maybe something you are interested in looking at?
The Code in
