.::Data Manipulation Instructions::.

Arithmetic Instructions

ADD/ADC destination, source

• add and add with carry

XADD destination, source

• just like add, but before storing result in destination, original destination value copied to source

SUB/SBB destination, source

• subtract and subtract with borrow

INC/DEC operand

• add or subtract one from operand

MUL operand

• unsigned multiplication
• 8-bit – AX = AL * operand
• 16-bit – DX:AX = AX * operand
• 32-bit – EDX:EAX = EAX * operand

IMUL operand

IMUL destination, source

IMUL operand1, operand2, immediate

• signed (integer) multiplication
• Can be one, two, or three operands
• One operand has same form as MUL
• Two operands – destination = destination * source
• Three operands
  • operand1 = operand2 * immediate
  • operand1 = operand1 * immediate

DIV/IDIV operand

• Unsigned/signed division
• 8-bit – AX/operand; quotient in AL and remainder in AH
• 16-bit – DX:AX/operand; quotient in AX and remainder in DX
• 32-bit – EAX:EDX/operand; quotient in EAX and remainder in EDX

NEG destination

• negate operand (take two’s complement)

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Logic Instructions

AND/OR/XOR destination, source

• sets zero flag if result is zero, clears it otherwise
• results stored in destination

NOT destination

• logical NOT of operand
• store result in destination

TEST destination, source

• logically ANDs the operands and sets the flags
• does not store result

BT/BTS/BTR/BTC source, index

• used to test a single bit

BSF/BSR destination, source

• bit scan forward/reverse
• searches for the first set bit from LO bit or HO bit

SETCC operand

• sets on a specified condition (carry/zero/sign/overflow/parity)