Output Register Information

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

Register: Contents
0: Reason code, if applicable, and if GPR15 return code is nonzero
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 IXCQUERY 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

Start of change For registers that the system changes, a caller who depends on these registers that contain the same value before and after issuing the macro must save these registers before issuing the macro and then restore them after the system returns control. End of change

IXCQUERY with REQINFO=COUPLE and with REQINFO=FEATURES generates an inline expansion; therefore, it does not use a control parameter list, does not produce a return code, and does not preserve AR/GPRs 0, 1, 14, or 15 across the expansion.