Mips Assembly

Posted 17 February 2010 - 12:12 AM

I am learning Mips assembly language, and am somewhat confused on the usage of loops.

addi $t0,$0,32
loop: andi $t1,$a0,1
sub $t0,$t0,$t1
srl $a0,$a0,1
bne $a0,$0,loop
end: add $a0,$t0,$0

So this is saying (?)

# Add 32 to 0 register, put in register t0
# Put bitwise 1 and bitwise contents of $a0 into $t1
# Subtract (signed) $t1 contents from $t0 contents, put in $t0
#

From here I am alittle lost. How do the shift right and left work?

Any help on this would be greatly appreciated. thanks!