R-Format Coding
	Coding Examples

I Format Coding

sub $s2, $s3, $t1

1. Look up the values of the registers in the table on p. A-23: $s2 is 18 = 10010₂, $s3 is 19 = 10011₂, and $t1 is 9 = 01001₂.

2. Look up the instruction to find its type and format. (You'll find it on p. A-59.) Plug the numbers into the format, being careful to get the registers in the right places:
   

   000000

   10011

   01001

   10010

   00000

   100010

   
   

3. Regroup the bits.
   

   0000

   0010

   0110

   1001

   1001

   0000

   0010

   0010

   
   

4. Represent as a hex number: 02699022

I Format Coding