Temtaime:

I'm writing some ASM code in my function.

Does it mean that DMD saves "his" registers before my asm code and restores after? So i can use all registers without interaction with code that DMD backend produces?

dmd saves some registers before the asm code, and then restores them after your asm. If you don't want that behavour then you have to use the "naked" attribute.

For details of what registers can be used take a look at the docs. And also take a look at the disassembly of your function that contains an empty asm statement, to see exactly what's saved.

Bye,
bearophile

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