SHIFTLEFT

The SHIFTLEFT instruction performs a left logical shift of variable's bits. It uses the following format:

Where:

label

Optional. A Program Execution Label.

source

Required. An Integer variable that is modified.

count

Required. A number of bits to shift.

Flags Affected: ZERO

Note the following:

1. The SHIFTLEFT instruction performs a left logical shift of the {source] variable bits by the {count} bit count value.

2. High order bits that are shifted beyond the size of the {source} variable are truncated and lost. Lower order bits that are shifted left are replaced with a bit value of zero.

3. The SHIFTLEFT and SHIFTLEFTA instructions always give the same results.

4. The ZERO flag is set if the resulting {source} variable value is zero.

See Also: SHIFTLEFTA, SHIFTRIGHT, SHIFTRIGHTA, ROTATERIGHT, ROTATELEFT, Mathematical Instructions