General register usage at entry to CELQPIPI
The following registers must have the prescribed contents when control reaches CELQPIPI.
- R0
- Undefined.
- R1
- Must point to an indirect parameter list consisting of 8 byte addresses that point to the parameters.
- R2-R12
- Undefined.
- R13
- Must point to a 36-word doubleword-aligned format 4 save area. See z/OS MVS Programming: Assembler Services Guide for a description of a format 4 save area.
- R14
- The return address.
- R15
- The address of CELQPIPI.