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  2. Bitwise operations in C - Wikipedia

    en.wikipedia.org/wiki/Bitwise_operations_in_C

    However, do note that a shift operand value which is either a negative number or is greater than or equal to the total number of bits in this value results in undefined behavior. This is defined in the standard at ISO 9899:2011 6.5.7 Bit-wise shift operators. For example, when shifting a 32 bit unsigned integer, a shift amount of 32 or higher ...

  3. Bitwise operation - Wikipedia

    en.wikipedia.org/wiki/Bitwise_operation

    Bitwise operation. In computer programming, a bitwise operation operates on a bit string, a bit array or a binary numeral (considered as a bit string) at the level of its individual bits. It is a fast and simple action, basic to the higher-level arithmetic operations and directly supported by the processor.

  4. Bit field - Wikipedia

    en.wikipedia.org/wiki/Bit_field

    Bit field. A bit field is a data structure that maps to 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. [1][2] A bit field is most commonly used to represent integral types of known, fixed bit-width, such as single-bit Booleans.

  5. Carry-less product - Wikipedia

    en.wikipedia.org/wiki/Carry-less_product

    Given two numbers = and =, with , {,} denoting the bits of these numbers. Then the carry-less product of these two numbers is defined to be c = ∑ i c i 2 i {\displaystyle \textstyle c=\sum _{i}c_{i}2^{i}} , with each bit c i {\displaystyle c_{i}} computed as the exclusive or of products of bits from the input numbers as follows: [ 1 ]

  6. C syntax - Wikipedia

    en.wikipedia.org/wiki/C_syntax

    The total number of bits in a single bit field must not exceed the total number of bits in its declared type (this is allowed in C++ however, where the extra bits are used for padding). As a special exception to the usual C syntax rules, it is implementation-defined whether a bit field declared as type int , without specifying signed or ...

  7. C data types - Wikipedia

    en.wikipedia.org/wiki/C_data_types

    Usually, the 32-bit and 64-bit IEEE 754 binary floating-point formats are used for float and double respectively. The C99 standard includes new real floating-point types float_t and double_t, defined in <math.h>. They correspond to the types used for the intermediate results of floating-point expressions when FLT_EVAL_METHOD is 0, 1, or 2.

  8. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    The code-rate of a given ECC system is defined as the ratio between the number of information bits and the total number of bits (i.e., information plus redundancy bits) in a given communication package. The code-rate is hence a real number.

  9. Mask (computing) - Wikipedia

    en.wikipedia.org/wiki/Mask_(computing)

    This way, for each intended image there are actually two bitmaps: the actual image, in which the unused areas are given a pixel value with all bits set to 0s, and an additional mask, in which the correspondent image areas are given a pixel value of all bits set to 0s and the surrounding areas a value of all bits set to 1s. In the sample at ...