0C ib         OR AL, imm8 AL                 OR imm8

0D iw         OR AX, imm16 AX                 OR imm16

0D id         OR EAX, imm32 EAX         OR imm32

80 /1 ib         OR r/m8,imm8 r/m8                 OR imm8

81 /1 iw         OR r/m16,imm16 r/m16         OR imm16

81 /1 id         OR r/m32,imm32 r/m32         OR imm32

83 /1 ib         OR r/m16,imm8 r/m16         OR imm8 (sign-extended)

83 /1 ib         OR r/m32,imm8 r/m32         OR imm8 (sign-extended)

08 / r         OR r/m8,r8 r/m8                 OR r8

09 / r         OR r/m16,r16 r/m16         OR r16

09 / r         OR r/m32,r32 r/m32         OR r32

0A / r         OR r8,r/m8 r8                 OR r/m8

0B / r         OR r16,r/m16 r16                 OR r/m16

0B / r         OR r32,r/m32 r32                 OR r/m32


Description

Performs a bitwise inclusive OR operation between the destination (first) and source (second) operands and stores the result in the destination operand location. The source operand can be an immediate, a register, or a memory location; the destination operand can be a register or a memory location. (However, two memory operands cannot be used in one instruction.) Each bit of the result of the OR instruction is 0 if both corresponding bits of the operands are 0; otherwise, each bit is 1.


Operands        Bytes                Clocks

reg, reg              2                    1   UV

mem, reg           2+d(0,2)        3   UV

reg, mem           2+d(0,2)         2   UV

reg, imm           2+i(1,2)         1   UV

mem, imm           2+d(0,2)+i(1,2)         3   UV*

acc, imm           1+i(1,2)          1   UV


* = not pairable if there is a displacement and immediate


Flags

The OF and CF flags are cleared; the SF, ZF, and PF flags are set according to the result. The state of the AF flag is undefined.

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