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- Arithmetic_overflow abstract "The term arithmetic overflow or simply overflow has the following meanings. In a computer, the condition that occurs when a calculation produces a result that is greater in magnitude than that which a given register or storage location can store or represent. In a computer, the amount by which a calculated value is greater in magnitude than that which a given register or storage location can store or represent. Note that the overflow may be placed at another location.Most computers distinguish between two kinds of overflow conditions. A carry occurs when the result of an addition or subtraction, considering the operands and result as unsigned numbers, does not fit in the result. Therefore, it is useful to check the carry flag after adding or subtracting numbers that are interpreted as unsigned values. An overflow proper occurs when the result does not have the sign that one would predict from the signs of the operands (e.g. a negative result when adding two positive numbers). Therefore, it is useful to check the overflow flag after adding or subtracting numbers that are represented in two's complement form (i.e. they are considered signed numbers).There are several methods of handling overflow: Design: by selecting correct data types, both length and signed/unsigned. Avoidance: by carefully ordering operations and checking operands in advance, it is possible to ensure that the result will never be larger than can be stored. Handling: If it is anticipated that overflow may occur and when it happens detected and other processing done. Example: it is possible to add two numbers each two bytes wide using just a byte addition in steps: first add the low bytes then add the high bytes, but if it is necessary to carry out of the low bytes this is arithmetic overflow of the byte addition and it necessary to detect and increment the sum of the high bytes. CPUs generally have a way of detecting this to support addition of numbers larger than their register size, typically using a status bit. Propagation: if a value is too large to be stored it can be assigned a special value indicating that overflow has occurred and then have all successive operation return this flag value. This is useful so that the problem can be checked for once at the end of a long calculation rather than after each step. This is often supported in Floating Point Hardware called FPUs. Ignoring: This is the most common approach, but it gives incorrect results and can compromise a program's security.Division by zero is not a form of arithmetic overflow. Mathematically, division by zero within reals is explicitly undefined.".
- Arithmetic_overflow wikiPageID "40724".
- Arithmetic_overflow wikiPageRevisionID "599741189".
- Arithmetic_overflow hasPhotoCollection Arithmetic_overflow.
- Arithmetic_overflow subject Category:Computer_arithmetic.
- Arithmetic_overflow comment "The term arithmetic overflow or simply overflow has the following meanings. In a computer, the condition that occurs when a calculation produces a result that is greater in magnitude than that which a given register or storage location can store or represent. In a computer, the amount by which a calculated value is greater in magnitude than that which a given register or storage location can store or represent.".
- Arithmetic_overflow label "Arithmetic overflow".
- Arithmetic_overflow label "Arithmetischer Überlauf".
- Arithmetic_overflow label "Desbordamiento aritmético".
- Arithmetic_overflow label "Overflow (informatica)".
- Arithmetic_overflow label "Overflow aritmetico".
- Arithmetic_overflow label "Przepełnienie".
- Arithmetic_overflow label "Арифметическое переполнение".
- Arithmetic_overflow label "算術オーバーフロー".
- Arithmetic_overflow label "算術溢出".
- Arithmetic_overflow sameAs Přetečení.
- Arithmetic_overflow sameAs Arithmetischer_Überlauf.
- Arithmetic_overflow sameAs Desbordamiento_aritmético.
- Arithmetic_overflow sameAs Overflow_aritmetico.
- Arithmetic_overflow sameAs 算術オーバーフロー.
- Arithmetic_overflow sameAs Overflow_(informatica).
- Arithmetic_overflow sameAs Przepełnienie.
- Arithmetic_overflow sameAs m.0b4n7.
- Arithmetic_overflow sameAs Q669163.
- Arithmetic_overflow sameAs Q669163.
- Arithmetic_overflow wasDerivedFrom Arithmetic_overflow?oldid=599741189.
- Arithmetic_overflow isPrimaryTopicOf Arithmetic_overflow.