pTAL Conversion Guide

pTAL Built-In Routines

pTAL Conversion Guide—527302-002

18-12

$ATOMIC_DEP

$ATOMIC_DEP, an atomic operation, deposits bits into an INT variable.

var input,output

INT:variable

is the variable into which $ATOMIC_DEP deposits bits from value.

mask input

INT:value

is a 16-bit mask word that determines which bits of value to deposit into var.

$ATOMIC_DEP stores into each bit position of var, the corresponding bit in value

after performing an “and” operation between the corresponding bits in value and

mask.

value input

INT:value

holds the bits that, after being masked, $ATOMIC_DEP deposits in var.

$ATOMIC_DEP performs the following operation:

var := (var LAND $COMP(mask)) LOR (value LAND mask)

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

Sets $CARRY No

Sets $OVERFLOW No

Example 18-4. Call to $ATOMIC_DEP Routine

INT var;

INT mask;

INT value;

$ATOMIC_DEP(var, mask, value);

) ;

VST609.vsd

($ATOMIC_DEP ,var

mask

value