DLX And & And-immediate instructions

The and instruction takes the 32-bit data value in register source1 and performs a logical-and operation
between it and the 32-bit value in register source2, then puts the result in register destination register. The and operation is carried out between corresponding bits of the two operands.

Source 1 and Source 2 =Destination register

Example:

r1=Source1
r2=Source2
r3=Source3

r1	r2	r3
0	0	0
0	1	0
1	0	0
1	1	1

And instruction can be used for masking to allow only certain bits

Example

If we are interested in last 4 digits of r1 register then create marking like below

r1	1	1	0	1	0	0	1	1
r2	0	0	0	0	1	1	1	1
r3	0	0	0	0	0	0	1	1

r2=We are interested in last 4 bits so we make last 4 digits to one and rest of them to zero
r3=first 4 digits are zero and last 4 digits followed r1 last 4 digits


DLX And and ANDI Instrunction

and r3,r1,r2
if r1 and r2 or equal then r3 will be 1 else r3 will be 0
andi  r3,r1,1
if r1 is 1 then r3 will be 1 else r3 will be 0


Tags:And instruction, And-immediate instructions,DLX and instruction, DLX Andi instruction