INC adds 1 to its operand. It does not affect the carry
flag: to affect the carry flag, use ADD something,1 (see
ADD). INC affects all the other flags according to the result.
This instruction can be used with a LOCK prefix to allow atomic execution.
See also DEC (DEC).
Every form of inc the assembler accepts.
| Form | Since | Notes |
|---|---|---|
| inc reg16 | 8086 | nolong |
| inc reg32 | 386 | nolong |
| inc r/m8 | 8086 | lock |
| inc r/m16 | 8086 | lock |
| inc r/m32 | 386 | lock |
| inc r/m64 | x86-64 | locklong |
| inc [reg8], r/m8 | x86-64 | apxlocklong |
| inc [reg16], r/m16 | x86-64 | apxlocklong |
| inc [reg32], r/m32 | x86-64 | apxlocklong |
| inc [reg64], r/m64 | x86-64 | apxlocklong |
