Subj : C is the most efficient p
To   : Nightfox
From : Boraxman
Date : Sun Dec 26 2021 09:27 pm

-=> Nightfox wrote to Boraxman <=-

 Ni> @MSGID: <61C6BCF6.3338.dove_dove-prg@digitaldistortionbbs.com>
 Ni> @REPLY: <61C649CF.2751.dove-prg@bbs.mozysswamp.org>
 Ni>   Re: C is the most efficient p
 Ni>   By: Boraxman to Nightfox on
 Ni> Sat Dec 25 2021 09:12 am

 Ni>> But still, assembler for each processor is defined by the operations
 Ni>> that the processor understands, and there is a specific syntax for
 Ni>> each operation.

 Bo> Have you ever used AT&T syntax?

 Ni> I haven't.

It's an alternative syntax for assembler, used by GAS and I guess other
assemblers for Unix too.

An example from a program I wrote is below

	movl %eax, BRK_Start
	movl %eax, BRK_End
	movl (%esp), %ecx
	cmp $1, %ecx
	je clifail
	cmp $3, %ecx
	jg clifail
	movl 8(%esp), %ebx
	jl success
	movb (%ebx), %al


As you can see, the syntax is familiar, but different.  Source and destination
are the other way around for MOV commands, the offset notation is different,
immediate values are prefixed with a $.

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