pTAL Reference Manual (H06.03+)

Built-In Routines

HP pTAL Reference Manual—523746-005

15-6

$ATOMIC_AND

$ATOMIC_AND performs an atomic LAND on two INT values.

var input,output

sINT:variable

is the variable to which $ATOMIC_AND applies mask.

mask input

INT:value

is a 16-bit mask that $ATOMIC_AND applies to var.

$ATOMIC_AND performs the following operation:

var := var LAND mask

The read, LAND, and store operations are performed without interruption, as if the

three operations were one.

The following table shows examples of $ATOMIC_AND:

Sets condition code Yes (according the final value of var )

Sets $CARRY No

Sets $OVERFLOW No

Example 15-4. $ATOMIC_AND Routine

INT var;

INT mask;

$ATOMIC_AND(var, mask);

var value result

%H1234 %HAAAA %HBCDE

%H1234 %H5555 %H6789

%H6789 %HAAAA %H1233

%H6789 %H5555 %HBCDE

$ATOMIC_AND ( ) ;

VST608.vsd

var mask,