pTAL Reference Manual (H06.03+)

Structures
HP pTAL Reference Manual—523746-005
9-61
Simple Pointer
Simple Pointer
A simple pointer redefinition associates a new simple pointer with a previous item at
the same BEGIN-END level of a structure.
VOLATILE
specifies that the value of this variable must be maintained in memory, not in a
register. Each reference to a VOLATILE data item causes the data item to be read
or written to memory even when code is optimized. Based on the order of reads
and writes in the source code, VOLATILE also causes that precise order of
memory references to be preserved, again, when code is optimized.
type
is any data type except UNSIGNED. The data type determines how much data the
simple pointer can access at a time—a byte, word, doubleword, or quadrupleword.
.
.EXT
.SG
.SGX
are indirection symbols (see Table 2-7 on page 2-7).
identifier
is the identifier of the new simple pointer.
.
.EXT
.SG
.SGX
REFALIGNED
( 2
8
)
=
previous-identifier
;
VST708.vsd
identifier
VOLATILE
type