Omron NS Reference Manual page 56

Section2 Functions
NS series Macro Reference
SWAPL
Swaps high order (2byte) and low order (2byte) of the specified long word
data
Applicable versions System version 4 or higher
Format
Function
Return Value
Example
SWAPL(S,n)
Swap high order (2 byte) and low order (2 byte) of the long word data or the internal
holding word which was taken n long word from S.
S: Top address ($W or $HW) to be swapped. (See note.)
n: The number of words to be swapped.
Setting range is as follows:
When specifying "n" directly : 1 to 16384
When specifying "n" indirectly: $W0 to $W32767
Note: Index can be set when using address to specify for S. Setting range is for $W
is between 0 and 32767 and for $HW is between 0 to 8191..
None
SWAPL ($W100, 3);
Swap high order and low order of the word data which was taken from 3 long words
from $W100.
<Before executing SWAPL>
$W100
1 2
$W101
5 6
$W102
9 0
$W103
3 4
$W104
7 8
$W105
1 2
$HW0 to $HW8191
3 4
7 8
Sw ap high
order and low
1 2
order of long
w ord data
5 6
9 0
3 4
36
<After executing SWAPL>
$W100
5 6 7
$W101
1 2 3
$W102
3 4 5
$W103
9 0 1
$W104
1 2 3
$W105
7 8 9
8
4
6
2
4
0