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ADC
ADD WITH CARRY
ADC
Operation:
if
(CF) = 1
then
(DEST)
+-
(LSRC)
+ (RSRC) + 1
else
(DEST)
+-
(LSRC) + (RSRC)
Description:
ADC destination, source
ADC (Add with Carry) sums the operands,
which may be bytes
or
words, adds one if CF
is
set and replaces the destination operand with
the result. Both operands may be signed or
unsigned binary numbers (see AAA and
DAA). ADC updates AF, CF,
OF, PF, SF and
ZF. Since ADC incorporates a carry from a
previous operation, it can be used to write
routines to add numbers longer than
16
bits.
Flags Affected:
AF,
CF, OF, PF, SF, ZF
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