Parameters

 

input=<>

   Register set that indicates those registers from which the
   routine receives input values.

   For the .JSB32_ENTRY directive, this register set is used only to
   document your code.
 

output=<>

   Register set that indicates those registers to which the routine
   assigns values that are returned to the routine's caller.

   For the .JSB32_ENTRY directive, this register set is used only to
   document your code.
 

scratch=<>

   Register set that indicates registers that are used within the
   routine but which should not be saved and restored at routine
   entry and exit. The caller of the routine does not expect to
   receive output values nor does it expect the registers to be
   preserved.

   Because R2 through R12 are not preserved by default, their
   inclusion in the scratch is for documentation purposes only.
 

preserve=<>

   Register set that indicates those registers that should be
   preserved over the routine call. This should include only those
   registers that are modified and whose full 64-bit contents should
   be saved and restored.

   This register set causes registers to be preserved by the
   compiler. By default, no registers are preserved by the .JSB32_
   ENTRY directive.

   This register set overrides the output and scratch register sets.
   If you specify a register both in the preserve register set and
   in the output or scratch register sets, the compiler will report
   the warning:

   %AMAC-W-REGDECCON, register declaration conflict in routine A