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The Auxiliary Carry flag is set (to 1) if during an "add" operation there is a carry from the low nibble (lowest four bits) to the high nibble (upper four bits), or a borrow from the high nibble to the low nibble, in the low-order 8-bit portion, during a subtraction. Otherwise, if no such carry or borrow occurs, the flag is cleared or "reset ...
The carry, parity, auxiliary carry (or half carry), zero and sign flags are included in many architectures (many modern (RISC) architectures do not have flags, such as carry, and even if they do use flags, then half carry is rare, since BCD math no longer common, and it even has limited support on long mode on x86-64).
The carry flag is set according to this addition, and subtract with carry computes a+not(b)+C, while subtract without carry acts as if the carry bit were set. The result is that the carry bit is set if a ≥ b , and clear if a < b .
What does half-staff or half-mast mean? Flying the American flag, or a state flag, halfway up the flagpole is a symbol of mourning for the country or state after the death of a government official ...
Flags in the US are flown at half-staff, also known as half mast, as a sign that the whole nation is mourning, according to the US Department of Veterans Affairs.
A flag is seen at half-staff at the U.S. Capitol on Friday, Sept. 29, 2023. Flags often fly at half-staff to honor at national tragedy, holiday, or the death of a government official, military ...