Output Register Information

When control returns to the caller of the IXLCSP macro, the general purpose registers (GPRs) contain:

Register: Contents
0: Reason code, if applicable, if GPR 15 return code is non-zero
1: Used as a work register by the system
2-13: Unchanged
14: Used as a work register by the system
15: Return code

When control returns to the caller of the IXLCSP macro, the access registers (ARs) contain:

Register: Contents
0-1: Used as work registers by the system
2-13: Unchanged
14-15: Used as work registers by the system

For registers that the system changes, a caller who depends on these registers containing the same value before and after issuing the macro must save these registers before issuing the macro and restore them after the system returns control.