pTAL Conversion Guide

pTAL Built-In Routines

pTAL Conversion Guide—527302-002

18-13

$ATOMIC_GET

Examples of $ATOMIC_DEP:

$ATOMIC_GET

$ATOMIC_GET, an atomic operation, gets (returns) the value of a variable.

var input

type:variable

is the variable whose value $ATOMIC_GET returns. var must be one of:

•

A one-byte, two-byte, or four-byte variable whose address is an integral

multiple of its width.

•

A bit field fully contained in a one-byte, two-byte, or four-byte variable that is

aligned on an even-byte boundary.

$ATOMIC_GET returns the value of var.

var value mask result

%H0000 %H1234 %HAAAA %H0220

%H0000 %H1234 %H5555 %H1010

%H0000 %H6789 %HAAAA %H2288

%H0000 %H6789 %H5555 %H1010

Sets condition code Yes

Sets $CARRY No

Sets $OVERFLOW No

Example 18-5. Call to $ATOMIC_GET Routine

INT var1;

INT var2;

var1 := $ATOMIC_GET(var2);

$ATOMIC_GET ( ) ;

VST610.vsd

var