[ILUG] Membership

[Paul Jakma]

On Wed, 15 Aug 2001, Dave Airlie wrote:

> I've only one thing to say...
>
> branch delay slots ... *shudder*....
>
> in pseudo dave-assembly (a combination of C, VAX/MIPS/x86/ARM asms)
>
> 	mov 56, r1  # put 56 into r1
> 	br  label   # branch to label
> 	inc r1
> label:  printf r1
>
> guess what r1 is at this stage? 56 taking bets? no it's 57... the increase
> instruction gets executed... it still makes my brain violently ill even 2
> or 3 years later (and I'm no longer active on Linux/MIPS)...

hmmm.. what's the correct way to do above then? (and is there a good
reason for it?)

 From the tiny tiny bit¹ that i do know of MIPS asm, you are required
to know scheduling and ordering requirements.... it's all laid bare.

> Dave.

--paulj

¹ playing around with tiny C progs and comparing the difference in the
resultant x86 and MIPS asm.