Encoding:

POOL32S

010110

rt

rs

rd

0

DADDU

101010000

6

5

5

5

2

9

Format: 

DADDU rd, rs, rt

microMIPS64

Doubleword Add Unsigned

Purpose:

Doubleword Add Unsigned

To add 64-bit integers

Description: 

 GPR[rd] = GPR[rs] + GPR[rt]

The 64-bit doubleword value in GPR rt is added to the 64-bit value in GPR rs and the 64-bit arithmetic result is placed into GPR rd.

No Integer Overflow exception occurs under any circumstances.

Restrictions:

Operation: 

GPR[rd] = GPR[rs] + GPR[rt]

Exceptions:

Reserved Instruction

Programming Notes:

The term "unsigned" in the instruction name is a misnomer; this operation is 64-bit modulo arithmetic that does not trap on overflow. It is appropriate for unsigned arithmetic such as address arithmetic, or integer arithmetic environments that ignore overflow, such as C language arithmetic.