* * *

Author Topic: Any support for "vectorcall" under Win64?  (Read 1550 times)


  • Jr. Member
  • **
  • Posts: 71
Any support for "vectorcall" under Win64?
« on: April 12, 2016, 09:29:50 pm »
I don't know whether to call this a feature request or asking for an answer in regards to what Free Pascal's implementation is...

Is there a means to request that a function be compiled under "vectorcall" rules when the target is x86-64 under Win64?  That is, https://msdn.microsoft.com/en-gb/library/dn375768.aspx?f=255&MSPPError=-2147217396.

I have a number of assembly language routines that are optimised to use SSE and AVX, but I still have to load input vectors into the XMM registers and store them back in memory afterwards, only to load them again for the next function.


  • Hero Member
  • *****
  • Posts: 6139
Re: Any support for "vectorcall" under Win64?
« Reply #1 on: May 31, 2016, 02:06:42 pm »
For FPC -Sv is the option, but also select a suitable FPU. (SSE(X), AVX, AVX2)
I might not give the answer that you want me to.. Peter Green 1969



Get Lazarus at SourceForge.net. Fast, secure and Free Open Source software downloads Open Hub project report for Lazarus