The flags can be used to decide subsequent operations, such as conditional jump instructions. For example if the result of an addition cannot be represented in the destination an arithmetic overflow is set. Processors have a status register that is composed of flags. Within CPUs and other logic devices, collections of bit fields called flags are commonly used to control or to indicate the outcome of particular operations. The meaning of the individual bits within the field is determined by the programmer for example, the first bit in a bit field (located at the field's base address) is sometimes used to determine the state of a particular attribute associated with the bit field. A bit field is most commonly used to represent integral types of known, fixed bit-width, such as single-bit Booleans. A bit field is a data structure that consists of one or more adjacent bits which have been allocated for specific purposes, so that any single bit or group of bits within the structure can be set or inspected.
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