CEEARLU — anchor lookup

Purpose

This routine sets register 12 to the Language Environment anchor. The anchor points to the CAA if Language Environment has been initialized.

Call CEEARLU

CEEARLU

Call this CWI interface as follows:

L      R15,=V(CEEARLU)
BALR   R14,R15

Upon return, R12 contains the address of the CAA, or zero if Language Environment has not been initialized.
R14 and R15 are used as linkage registers. R0 is destroyed across the call. R13 is not used.
This routine is meant to be a fast way of retrieving the anchor. The address of the CAA is not validated by this routine.
AMODE switching is not performed across this call.
For additional information on the anchor lookup, see Anchor support.
If the Language Environment environment is not initialized, a value of zero is returned. This routine does not cause the Language Environment environment to be established.
It must be linked with the program. It is not meant to be called from an HLL program.