[fpc-devel] Improving i8086 performance..

Max Nazhalov stein_nospam at mail.ru
Mon Dec 23 14:34:15 CET 2013

Hello, Everybody!

Can anyone having the real i8086 hardware check attached MUL-helpers?
I've tested them on a modern Intel CPU -- "mul_dword" is about 4.5..5
times faster comparing to the generic FPC implementation, and
"mul_qword" is about 18..20, but these numbers surely should be quite
different for the real i8086 due to the progress in the today's ALU design.
Just curious how "fast" they can be in the silicon of those days..

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