can i code like this in 64 bit instead?

[daydreamer]

64 bit winabi register preservation rules apply to gdi as well?
Is it possible to have a loop with one or more xmm regs hold data and trust gdi calls keep them preserved,so i can use them in a loop?
But in 32bit i need to preserve registers myself before call ?

[hutch--]

They apply to everything. Registers are registers.

[zedd151]

http://masm32.com/board/index.php?topic=783.0
Don't know if this might help Magnus but I came across that thread during my wanderings about the forum and remember this one. 

[HSE]

Hi daydreamer!

Is it possible to have a loop with one or more xmm regs hold data and trust gdi calls keep them preserved,so i can use them in a loop?

In theory, any procedure that follow x64 ABI must preserve xmm6 through xmm15. And GDI must not be an exception.

But that give me the idea 

Now I added pseudo push/pop of XMM registers:

Code Select Expand

freg_push xmm6
  · · ·
freg_pop xmm6 

Test is with ML64 (and removing xmm6 preservation  ).

Regards, HSE.

[daydreamer]

great Hector
now I understand it better,thanks Zedd,Hutch,Hector