From:	XXguille AT XXiies DOT XXes (Guillermo Rodriguez Garcia)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: asm code
Date:	Thu, 13 May 1999 22:56:23 GMT
Organization:	Telefonica Transmision de Datos
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To:	djgpp AT delorie DOT com
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El día Thu, 13 May 1999 17:48:49 -0400, seth <sethpark AT bellsouth DOT net>
escribió:

>Hello, I just started trying to learn Assembler.
>I have a few questions....
>Is adding/subtracting ect. necessarily alot faster in Asm than in C?
>Such as:
>	mov ax, 5
> 	mov bx, 5
>	add ax, bx
>
>Would that be faster than
>
>	int one, two;
>	one+=two;

Not usually. The compiler will optimise the code as much as possible,
and many times this means that it will optimise it more than you.

>Also, could someone give me some example code on how to add four numbers
>and find the average with Asm?

Using Intel syntax (the same you used above, which is NOT the one that
djgpp will understand : AT&T) and assumming that the four numbers are
integers that can be added into a 32 bit register without overflow:

	mov eax, number1
	add eax, number2
	add eax, number3
	add eax, number4
	shr eax, 2		; same as divide by 4


Regards,
GUILLE
----
Guillermo Rodriguez Garcia
XXguille AT XXiies DOT XXes (ya sabes :-)

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