Integer Addition (add)

add{bwl} 	reg[8|16|32], r/m[8|16|32]
add{bwl} 	r/m[8|16|32], reg[8|16|32]
add{bwl} 	imm[8|16|32], r/m[8|16|32]

Operation

reg[8|16|32] + r/m[8|16|32] -> r/m[8|16|32]

r/m[8|16|32] + reg[8|16|32] -> reg[8|16|32]

imm[8|16|32] + r/m[8|16|32] -> r/m[8|16|32]

Description

Integer adds operand1 to operand2 and stores the result in operand2.

When an immediate byte is added to a word or long, the immediate value is sign-extended to the size of the word or long operand.

If you wish to decimal adjust (daa) or ASCII adjust (aaa) the add result, use the form of add that stores the result in AL.

Example

Integer adds the 8-bit constant, -126, to the content of the AL register:

addb $-126,%al

Integer adds the word contained in the effective address (addressed by the EDI register plus an offset of 4) to the content of the DX register:

addw 4(%edi),%dx

Integer adds the content of the EDX register to the effective address (addressed by the EDI register plus an offset of 4):

addl %edx, 4(%edi)