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ADC
Adds the source operand and the destination operand, plus the value of the Carry Flag (CF), and stores the result in the destination operand.
The following table covers the supported source and destination operands.
| source | destination(s) |
|---|---|
| reg | reg |
| imm | reg |
| reg | mN |
| imm | mN |
| mN | reg |
| mN | mN |
DO NOT support LOCK
The instruction is available in 16-bit, 32-bit, and 64-bit operand sizes. When operating in 64-bit mode, the instruction supports r64, r32, r16, and r8 registers.
The instruction updates the following flags based on the result: CF, ZF, SF, PF, and AF (only for operand size $\le$ 32 bits). The Overflow Flag (OF) is updated based on the result of the addition of the source and destination, ignoring the carry-in from CF.
To avoid unexpected behavior during multi-precision arithmetic, the programmer MUST ensure that the Carry Flag is correctly initialized (e.g., using CLC or STC) before the first ADC or ADD operation in a sequence. Failure to do so SHALL result in an incorrect sum due to an indeterminate carry-in.