Am 28.12.2021 um 15:01 schrieb Bart via lazarus:
On Tue, Dec 28, 2021 at 2:46 PM Marco van de Voort via lazarus
<lazarus@lists.lazarus-ide.org> wrote:
You need an appropriate minimal CPU with -Cp
Try e.g. -Cpcoreavx for core 3000 series and higher
Thanks for that.
Up to PENTIUMM: PopCnt slower
COREI : approximately equally fast
COREAVX PopCnt slightly faster
COREAVX2 PopCnt slightly faster
Most likely not worth bothering.
In code can we check (at compile time) for which instructionset the
code was compiled?
For X86, check for the define CPUX86_HAS_POPCNT (compile time!).
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