how could I use the __asm { } statement in visual c++?! i'm interested in optimize my source with assembler, and now(today i ve found this statement in the msdn-library) i just wanna know how (when you know some assembler-tutorials, i'm interested, to) Edited by - davepermen on 10/1/00 7:50:51 AM

Yes...that's the way to use ASM-code, but if you only need one line of code then
_asm code
would work as well..
There are some good tutorials on the net written by Iczelion, but i don't know the URL..I've got the zipped tut's so if you're interested mail me at Wixner@Hotmail.com

//Patrik Wixner


Edited by - Metus on October 1, 2000 6:43:19 AM

the problem is, it doesnt work, and I don''t know why.. (I dont understand anything in asm, but I used the examples from msdn, so ?! what should i do,that the compiler understand my code?!)

we wanna play, not watch the pictures

i''m just playing around with my links and images

we wanna play, not watch the pictures

ok, i was just to stupid, i let the compiler create the exe in a folder, and execute it in another
ok know it runs.. (i dont say that it has a complete shut down), im just at the beginning of asm..

we wanna play, not watch the pictures

ok this stupid little source-snipple is working:

#pragma warning( disable : 4035)
int power2( int num, int power )
{
__asm
{
mov eax, num ; Get first argument
mov ecx, power ; Get second argument
shl eax, cl ; EAX = EAX * ( 2 to the power of CL )
}
}
#pragma warning( default : 4035 )


(the pragmas are for disableing the warning, that i havent a return value, because i have one, vc++ just couldnt see it

we wanna play, not watch the pictures

ya know (num<<) (think thats what it is) would proberbly be just as fast if not faster then that
and why not make power a byte...just move to cl then less shit to move around
better yet do 2 powers at a time might need to move back to vaibles in asm (think vc++ uses eax for return values...all of the windows functions do) but it should all work in 3 clocks on a pentium

I agree with the AP.

int power2( int num, int power ){  __asm  {    mov eax, num ; Get first argument    mov ecx, power ; Get second argument    shl eax, cl ; EAX = EAX * ( 2 to the power of CL )  }} 

could be rewritten as such:

    int __inline power2( int num, int power ){  return (num << power);}    

That''s my opinion anyway.

Regards,
Jumpster





Semper Fi

could be.. yes

the example was just a demo from the MSDN Library, and it has shown, that it works and that was all I wanted

we wanna play, not watch the pictures