TAL Reference Manual

Equivalenced Variables

TAL Reference Manual—526371-001

10-5

Example of Equivalenced Simple Pointer Declaration

This example declares an INT(32) simple pointer equivalent to an INT simple pointer.

Both contain a word address:

Equivalenced Definition Structure

An equivalenced definition structure declaration associates a new structure with a

previously declared variable.

. (period)

is the standard indirection symbol and denotes 16-bit indirect addressing. An

absence of any indirection symbol (. or .EXT) denotes 16-bit direct addressing.

.EXT

is the extended indirection symbol and denotes 32-bit indirect addressing. An

absence of any indirection symbol (. or .EXT) denotes 16-bit direct addressing.

identifier

is the identifier of a definition structure to be made equivalent to previous-identifier.

VST1005.vsd

PTR1 = 200

G[200]

PTR2 = 200

INT .ptr1 := 200;

INT(32) .ptr2 = ptr1;

VST1006.vsd

[

index

]

offset

;

previous-identifier

identifier

STRUCT

.EXT

structure-layout

;