Difference between revisions of "Shl"
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| + | == Overview == | ||
'''Sh'''ift '''l'''eft ('''shl''') performs a left bit-shift operation (opposite than [[Shr|shr]]). | '''Sh'''ift '''l'''eft ('''shl''') performs a left bit-shift operation (opposite than [[Shr|shr]]). | ||
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| − | If you call ClearBit(%1111,1) then get %1101 (%1111 = 15 and %1101 = 13). | + | If you call ClearBit(%1111,1), then you get %1101 (%1111 = 15 and %1101 = 13). |
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| + | If you call ClearBit(13,2), then you get 9 (9 = %1001) . | ||
| + | == See also == | ||
| + | * [[And]] | ||
| + | * [[Not]] | ||
* [[Or# Set a bit|Set a bit]] | * [[Or# Set a bit|Set a bit]] | ||
* [[Xor# Toggle a bit|Toggle a bit]] | * [[Xor# Toggle a bit|Toggle a bit]] | ||
| + | * [[Bit manipulation]] | ||
[[Category:Pascal]] | [[Category:Pascal]] | ||
Revision as of 14:26, 5 May 2014
Overview
Shift left (shl) performs a left bit-shift operation (opposite than shr).
E.g
Command is: 00000100 shl 2 Action is: 00000100 <- 00 Result is: 00010000
Clear a bit
function ClearBit( const aValue, aBitNumber : integer ) : integer;
begin
result := aValue and not( 1 shl aBitNumber );
end;If you call ClearBit(%1111,1), then you get %1101 (%1111 = 15 and %1101 = 13).
If you call ClearBit(13,2), then you get 9 (9 = %1001) .
