TAL Reference Manual

TAL Syntax Summary (Bracket-and-Brace Diagrams)

Appendix C—526371.001

C-29

$OVERFLOW Function

The $OVERFLOW function checks the state of the overflow indicator and indicates

whether an overflow occurred during an arithmetic operation.

$PARAM Function

The $PARAM function checks for the presence or absence of an actual parameter in

the call that invoked the current procedure or subprocedure.

$POINT Function

The $POINT function returns the fpoint value, in integer form, associated with a FIXED

expression.

$READCLOCK Function

The $READCLOCK function returns the current setting of the system clock.

$RP Function

The $RP function returns the current setting of the compiler’s internal RP counter. (RP

is the register stack pointer.)

$SCALE Function

The $SCALE function moves the position of the implied decimal point by adjusting the

internal representation of a FIXED (

fpoint) expression.

$OPTIONAL ( cond-expression , { param } )

{ param-pair }

$OVERFLOW

$PARAM ( formal-param )

$POINT ( fixed-expression )

$READCLOCK

$RP

$SCALE ( fixed-expression , scale )