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Assembler with gcc/g++

Red Drake · 2004-06-10T08:55:50

I have been writeing a engine for my new game in Dev-cpp(5)and so far i have been able to get it all working OK. The problem starts when i want to optimize my engine with SIMD (3DNow! to be specific). I want to write an assembler function and I get stuck with pasing the functions parameters. I hawe read that the GCC/G++ compilers can''t see an local variable inside an ASM("") block. Question : How can i use the function parameters in ASM block P.S. I have tried the pop funct. and i get an Error mesage by Windows! And sory abouth bad speling but i don''t speek english wery well

General and Gameplay Programming Programming

Started by Red Drake May 18, 2004 05:14 PM

14 comments, last by Red Drake 19 years, 10 months ago

Anonymous

June 09, 2004 03:26 PM

Charles B I''ld be glad to receive your code sample...

You cans end it to me at :
phiaphednrwl@jetable.com

thanks a lot.

Charles B

863

June 09, 2004 03:29 PM

K but I''ll do that, wait a bit. My dev PC is not this one, not connected. None can hack it

"Coding math tricks in asm is more fun than Java"

Red Drake

120

Author

June 09, 2004 03:54 PM

Thank''s and only one question - I said this a lot of times to you today buth i keep thinking of things that I don''t know of assembly that I am shure that you will know.
So is 3DNow! actualy slower than SSE - not in code usage (becouse you only hawe 2 registers) buth in tehnical/arhitectural way - lets say you use 3DNow sqrt & SSE sqrt so wich one woud be faster and similar instructs or are they the same ?

Red Drake

120

Author

June 09, 2004 04:00 PM

quote:Original post by Charles B
K but I''ll do that, wait a bit. My dev PC is not this one, not connected. None can hack it

Did you already sent me e-mail becouse I recived one totaly empty - (i don''t wan''t to display the adress becouse of your privacy).
My outlook is totaly fu**d by SPAM - "buy viagra .... Chaeap WinXP license ..."

Red Drake

Charles B

863

June 10, 2004 07:12 AM

I am emailing right now. I have cleaned a few personnal things out of the files. And I have transfered it on this PC. So I e-mail right after this post, and I go swimming

SSE is basically faster because 128bits, that is 4xfloats. Now download the vendors (AMD, Intel) tach papers to compare te latencies. If you want to use SIMD sqrt to accelerate float sqrtf(float), I can''t tell. This depends on latencies.

"Coding math tricks in asm is more fun than Java"

Red Drake

120

Author

June 10, 2004 08:55 AM

I hawe got the mail - thank''s - I''ll go check it out and then go start learning History (I got a test tomorow

Red Drake

Assembler with gcc/g++

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