SHR: Difference between revisions
Jump to navigation
Jump to search
Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
Report a broken link
No edit summary |
No edit summary |
||
| (One intermediate revision by the same user not shown) | |||
| Line 20: | Line 20: | ||
* 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. | * 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. | ||
{{PageAvailability}} | |||
* '''Version 1.3 and up'''. | * '''Version 1.3 and up'''. | ||
| Line 56: | Line 57: | ||
0 | 0 | ||
{{OutputEnd}} | {{OutputEnd}} | ||
{{PageSeeAlso}} | {{PageSeeAlso}} | ||
| Line 61: | Line 63: | ||
* [[_BYTE]], [[INTEGER]] | * [[_BYTE]], [[INTEGER]] | ||
* [[LONG]], [[_INTEGER64]] | * [[LONG]], [[_INTEGER64]] | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 01:07, 29 January 2023
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