pTAL Reference Manual (G06.24+, H06.09+, J06.03+)

Dependencies:

• If both CALL_SHARED and

NOCALL_SHARED appear in the

same compilation unit, the compiler

uses the one that appears last

• Do not use CALL_SHARED with

GP_OK

GP_OK (page 397)References:

CHECKSHIFTCOUNT

generates code that causes an overflow trap if the number of positions in a bit-shift operation

is too large, as in:

INT j := 20;

INT i;

I := i << j;

(For more information about bit shifts, see Bit Shifts (page 94).)

NOCHECKSHIFTCOUNT

suppresses the generation of code that causes an overflow trap if the number of positions in a

bit-shift operation is too large.

CAUTION: If such a bit-shift operation occurs, subsequent program behavior is undefined.

PUSHCHECKSHIFTCOUNT

pushes the current setting (CHECKSHIFTCOUNT or NOCHECKSHIFTCOUNT) onto the

CHECKSHIFTCOUNT directive stack. Does not change the current setting.

POPCHECKSHIFTCOUNT

pops the top value from the CHECKSHIFTCOUNT directive stack and changes the current

setting to that value.

For an explanation of directive stacks, see Directive Stacks (page 369).

NOCHECKSHIFTCOUNTDefault:

AnywherePlacement:

Scope:

• CHECKSHIFTCOUNT applies to the shift operators that follow it until it is

overridden by NOCHECKSHIFTCOUNT

• NOCHECKSHIFTCOUNT applies to the shift operators that follow it until

it is overridden by CHECKSHIFTCOUNT

NoneDependencies:

384 Compiler Directives