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ZPUSH(P),ZPOP(P)
7.18.8 Batch save or recovery of index register
(ZPUSH(P),ZPOP(P))
ZPUSH(P),ZPOP(P)
Function
ZPUSH
(1) Saves the contents of the following index registers to after the device specified by .
(When contents of an index register are saved, + 0 (the number of saves made) is
increased by 1.)
• Basic model QCPU: Z0 to Z9
• High Performance model QCPU/Process CPU/Redundant CPU:
Z0 to Z15
• Universal model QCPU: Z0 to Z19
(2) The ZPOP instruction is used for data recovery. Nesting is possible within the ZPUSH to
ZPOP cycle.
(3) If nesting has been done, each time the ZPUSH instruction is executed, the field used
following will be added to, so a field large enough to accommodate the number of times
the instruction will be used should be maintained from the beginning.
(4) The composition of the field used following is as shown below:
• When Basic model QCPU is used
: Head number of the devices to/from which contents of an index register are saved/recovered (BIN 16 bits)
Setting
Data
Internal Devices
R, ZR
J\
U\G
Zn Constants Other
Bit Word Bit Word
–– ––
Basic
Process
High
performance
Redundant
Universal
Command
Command
P
D
D
ZPUSHP, ZPOPP
ZPUSH, ZPOP
indicates an instruction symbol of ZPUSH/ZPOP.
D
D
D
D
D
D
Z0
Z1
Number of saves
Z9
Reserved by the
system (5 words)
Z0
+0
+1
+2
+10
+11
+15
+16
+17
Z1
1st nesting
(15 words for the 1st nesting)
2nd nesting
D