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  2. Logical shift - Wikipedia

    en.wikipedia.org/wiki/Logical_shift

    Logical right shift differs from arithmetic right shift. Thus, many languages have different operators for them. For example, in Java and JavaScript, the logical right shift operator is >>>, but the arithmetic right shift operator is >>. (Java has only one left shift operator (<<), because left shift via logic and arithmetic have the same effect.)

  3. Bitwise operation - Wikipedia

    en.wikipedia.org/wiki/Bitwise_operation

    In a left arithmetic shift, zeros are shifted in on the right; in a right arithmetic shift, the sign bit (the MSB in two's complement) is shifted in on the left, thus preserving the sign of the operand. This example uses an 8-bit register, interpreted as two's complement: 00010111 (decimal +23) LEFT-SHIFT = 00101110 (decimal +46)

  4. Arithmetic shift - Wikipedia

    en.wikipedia.org/wiki/Arithmetic_shift

    The two basic types are the arithmetic left shift and the arithmetic right shift. For binary numbers it is a bitwise operation that shifts all of the bits of its operand; every bit in the operand is simply moved a given number of bit positions, and the vacant bit-positions are filled in.

  5. Bitwise operations in C - Wikipedia

    en.wikipedia.org/wiki/Bitwise_operations_in_C

    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 would be undefined. Left shift can be used to multiply an integer by powers of 2 as in

  6. Barrel shifter - Wikipedia

    en.wikipedia.org/wiki/Barrel_shifter

    The very fastest shifters are implemented as full crossbars, in a manner similar to the 4-bit shifter depicted above, only larger. These incur the least delay, with the output always a single gate delay behind the input to be shifted (after allowing the small time needed for the shift count decoder to settle; this penalty, however, is only incurred when the shift count changes).

  7. Fold (higher-order function) - Wikipedia

    en.wikipedia.org/wiki/Fold_(higher-order_function)

    These pictures illustrate right and left fold of a list visually. They also highlight the fact that foldr (:) [] is the identity function on lists (a shallow copy in Lisp parlance), as replacing cons with cons and nil with nil will not change the result. The left fold diagram suggests an easy way to reverse a list, foldl (flip (:)) []. Note ...

  8. Switch your Inbox style in AOL Mail

    help.aol.com/articles/switch-your-inbox-style-in...

    1. Click the Settings icon | select More Settings. 2. Click Viewing email. 3. Under Inbox style, select Unified Inbox or use New/Old Mail. 4. Click Back to Inbox or Back to New Mail when done.

  9. numeric_std - Wikipedia

    en.wikipedia.org/wiki/Numeric_std

    numeric_std is a library package defined for VHDL. It provides arithmetic functions for vectors. Overrides of std_logic_vector are defined for signed and unsigned arithmetic.