The FLAGS register is the status register that contains the current state of an x86 CPU. The size and meanings of the flag bits are architecture dependent. It usually reflects the result of arithmetic operations as well as information about restrictions placed …

Apr 27, 2009 · The CF (carry flag) tells whether a bit was carried out of the word entirely (e.g. into bit 33 or bit 65). If numbers are interpreted as unsigned, carry flag means that addition overflowed, and the result is too large to fit in a machine word.

Auxiliary Flag is used as CF but when working with BCD. So AF will be set when we have overflow or underflow on in BCD calculations. For example: considering 8 bit ALU unit, Auxiliary flag is set when there is carry from 3rd bit to 4th bit i.e. carry from lower nibble to higher nibble.

Dec 28, 2021 · Carry Flag (CF) : When the microprocessor performs the addition of two 8 or 16-bit numbers the result obtained in ALU will be a maximum of 9 or 17 bit. The last carry generated is directly copied into carry flag.

Apr 9, 2024 · Carry Flag (CF): If there is a carry out from the most significant bit (MSB) on addition, or there is a borrow into the MSB on subtraction, CF will be 1. Otherwise, CF will be 0.

CF--The "carry flag". Contains the bit that carries out of an addition or subtraction. Can be used by the "jc" (jump if carry flag is set) instruction. Set by all the arithmetic instructions. Can be added into another arithmetic operation with "adc" (add with carry).

May 24, 2015 · Overflow Flag tells you that the signed numbers you added have crossed the two´s-complement boundary and that the result can no longer be relied on. Negative Flag together with OF can be used for comparing two signed numbers.

When numbers are added and subtracted, carry flag CF represents 9th bit, if 8-bit numbers added 17th bit, if 16-bit numbers added 33rd bit, if 32-bit numbers added and so on. With addition, the carry flag CF records a carry out of the high order bit. For example,

Apr 8, 2024 · In x86 assembly language, Carry Flag (CF), Sign Flag (SF), Zero Flag (ZF), and Parity Flag (PF) are essential flags that determine the outcome of various arithmetic and logical operations. This article provides an explanation of each flag and its role in the x86 instruction set.

Status Flags - Carry Flag (CF) The status flags to reflect the result of an operation. Example, If SUB AX,AX is executed, the zero flag becomes 1, indicating that a zero result was produced. CF is 1 if there is a carry out from the most significant bit (msb) on addition, or there Is a borrow into the msb on subtraction; otherwise, its 0.