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. The overflow flag is irrelevant.

2024年4月9日 · 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.

You've also got to be aware of which instructions set which flags. For example, the "cmp", "and" (bitwise AND), "sub", and "add" instructions set all the flags; "inc" (increment by 1) and "dec" (decrement by 1) set everything but CF; while "mov" and …

2021年12月28日 · 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.

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,

2024年4月8日 · 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.

There are six conditional flag. 1.The Parity Flag (PF)-If the no of 1's is even in the output stored in the accumulator then it is set otherwise it is reset for the odd. 2. The Zero Flag (ZF)-If the result stored in an accumulator is zero then this flip flop is set otherwise it is reset.

3.8.1 Carry and Direction Flag Control Instructions The carry flag instructions are useful in conjunction with rotate-with-carry instructions RCL and RCR. They can initialize the carry flag, CF, to a known state before execution of a rotate that moves the …

2006年6月1日 · The carry flag (CF) is set when the result of an unsigned arithmetic operation is too large to fit into the destination. The overflow flag (OF) is set when the result of a signed arithmetic operation is too large or too small to fit into the destination.