HP 3000 Manuals HP 3000 Manuals
ZSIZE
NM and CM callable.
Alters current DB to Z area of the compatibility mode (CM) stack.
Syntax
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| |
| I16 I16V |
| newsize:=ZSIZE(size); |
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Functional Return
newsize 16-bit signed integer (assigned functional return)
Passes the size, in half words (CM words) actually
granted.
Parameters
size 16-bit signed integer by value (required)
Passes the desired register value of Z, relative to
DB. This is the number of half words (CM words)
from DB to Z. This value must be >=0.
Operation Notes
When called from programs running in NM, only the CM stack is affected.
Programmatic expansion and contraction of the NM stack is not necessary.
Allows an NM program to alter the size of the current DB to Z area of the
CM stack by adjusting the register offset of the Z address from the DB
address (DB to Z).
Increases the Z address (CM stack expands) or decreases the Z address (CM
stack contracts). If the Z to DB area size requested exceeds the maximum
size permitted for the DL to Z (CM stack) area, only the maximum size
allowed is granted.
All changes to the DB to Z area are made in increments or decrements of
128 half words (CM words); the size granted may differ from the size
requested.
Condition Codes
CCE (2) Request granted.
CCG (0) Request granted. The requested size exceeded the
maximum limits of the DL to Z (CM stack) area. The
maximum limit is granted, and the value is returned
in newsize.
CCL (1) An illegal size parameter, less than (S - DB) + 64
half words was specified. The minimum value is
assigned by default.
Related Information
Intrinsics None
Commands None
Manuals Programmer's Skills Migration Guide (30367-90005).