[fpc-devel] non volatile registers.

Marco van de Voort marcov at stack.nl
Wed Jun 7 17:06:27 CEST 2017

In our previous episode, Marco van de Voort said:
> I can remember somebody (Sven?) explaining how to save non volatile
> (xmm) registers callee side on win64. (equivalent to Delphi .savenv)
> I searched for that post (some mantis comment?) but can't find it. A quick
> test seems to indicate that simply adding it to the registers list doesn't
> work. (or it is caller that saves, which is not useful in my (DLL) case)
> Does sb (Sven?) remember that discussion?
> I guess I can all save them manually in local variables.

Got it, no assembler procedure, just an "asm" block within a proper

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