220
Section 3: Assembler
TI
-
89 / TI
-
92 Plus Sierra C Assembler Reference Manual
Not for Distribution
Beta Version February 2, 2001
.comm / COMM — Define a comm Symbol
Syntax
.comm
symbol
,
count
[,
align
]
COMM[.S]
symbol
,
count
[,
align
]
Description
symbol
Specifies a symbol that is not defined elsewhere in the current file.
count
Specifies the number of bytes associated with the symbol. It is an
absolute expression that cannot contain any forward, external, or
undefined references.
align
Specifies the alignment requirements for the symbol. Its value can
be 1, 2, or 4. It is an absolute expression that cannot contain any
forward, external, or undefined references.
The
COMM
directive defines the specified symbol
symbol
and associates with it
a block of uninitialized data in the BSS-type section
.bss
. The number of bytes in
this block is specified by
count
. The alignment of the block is specified by
align
; if
omitted or if the
-c
flag has been specified, quad alignment is used.
The scope of the symbol
symbol
is external. The block of data is allocated during
linkage, unless the
-6
flag has been specified, in which case it is allocated during
assembly. For more information, see section
3.3.5.4 Comm and Lcomm
Symbols
.
The
.S
qualifier is used to indicate that the symbol can be referenced with the
absolute short addressing mode (i.e., the symbol will reside in the top or bottom
32K of memory).
Examples
COMM table,4096
COMM strings,256,2
COMM.S buffer,4
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