Delay Slot

[Elias Kesh <elias@cobaltmicro.com>]

Can someone explain to me what a delay slot is ? Twice now I have had to 
change code from this
                li      a0,0
        
        jal     do_IRQ

                move    a1,sp                   # delay slot

to this,
                li              a0,0

                li              a1,0xffffffff   # Kludge by elias
                and             a1,sp

                jal             do_IRQ
                nop

in order to get the right arguments at the other end. I am using gcc 
2.7.2-2 and the processor is a 4300 from NEC.

Elias
elias@kesh.com
elias@cobaltmicro.com