SHR

The _SHR function is used to shift the bits of a numerical value to the right.

Syntax

result = _SHR(numericalVariable, numericalValue)

Parameters

• numericalVariable is the variable to shift the bits of and can be of the following types: INTEGER, LONG, _INTEGER64, or _BYTE.
• Integer values can be signed or _UNSIGNED.
• numericalValue the number of places to shift the bits.
• While 0 is a valid value it will have no affect on the variable being shifted.

Description

• Allows for division of a value by 2 faster than normal division (see example 2 below).
• Bits that reach the end of a variables bit count are dropped.
• The type of variable used to store the results should match the type of the variable being shifted.
• NOTE: When dealing with SIGNED variables, shifting the bits right will leave the sign bit set. This is due to how C++ deals with bit shifting under the hood.

Availability

• Version 1.3 and up.

Examples

Example 1:

A~%% = 128 'set left most bit of an_UNSIGNED _BYTE PRINT A~%% PRINT _SHR(A~%%,7) PRINT _SHR(A~%%,8) 'shift the bit off the right 'edge'

128 1 0

Example 2:

A~%% = 128 FOR I%% = 0 TO 8 PRINT _SHR(A~%%, I%%) NEXT I%%

128 64 32 16 8 4 2 1 0

See also

• _SHL, _ROL, _ROR
• _BYTE, INTEGER
• LONG, _INTEGER64

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