MISSING: Multiple-Epoch Facility

[Fish-Git]

Multiple-Epoch Facility   (September,2017)

The multiple-epoch facility may be available on a model implementing z/Architecture. The facility provides the means by which a nonzero epoch index may be stored in byte 0 of the operand of the STORE CLOCK EXTENDED instruction and in bits 9-15 of the trace entry formed by the TRACE (TRACG) instruction.

The multiple-epoch facility also provides four additional functions for the PERFORM TIMING FACILITY FUNCTION (PTFF) instruction:

  • Query steering information extended
  • Query TOD offset user extended
  • Set TOD offset extended
  • Set TOD offset user extended

Additionally, the multiple-epoch facility provides the clock-comparator sign control, allowing the comparisons of the clock comparator to be either signed or unsigned.

When the multiple-epoch facility is installed, the store-clock-fast and TOD-clock-steering facilities are also installed.

[Fish-Git]

Moved to combined issue #77 "MISSING Facilities support".