Filter
Top Products
Assembler Reference
3-10 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
3.4 Built-in variables
Table 3-1 lists the built-in variables defined by the ARM assembler.
Built-in variables cannot be set using the
SETA
,
SETL
, or
SETS
directives. They can be used
in expressions or conditions, for example:
IF {ARCHITECTURE} = "4T"
Table 3-1 Built-in variables
{PC}
or
.
Address of current instruction.
{VAR}
or
@
Current value of the storage area location counter.
{TRUE}
Logical constant true.
{FALSE}
Logical constant false.
{OPT}
Value of the currently-set listing option. The
OPT
directive can be used to save the current listing
option, force a change in it, or restore its original value.
{CONFIG}
Has the value
32
if the assembler is assembling ARM code, or
16
if it is assembling Thumb code.
{ENDIAN}
Has the value
big
if the assembler is in big-endian mode, or
little
if it is in little-endian mode.
{CODESIZE}
Is a synonym for
{CONFIG}
.
{CPU}
Holds the name of the selected cpu. The default is
ARM7TDMI
. If an architecture was specified in
the command line
-cpu
option,
{CPU}
holds the value "
Generic ARM
".
{FPU}
Holds the name of the selected fpu. The default is
SoftVFP
.
{ARCHITECTURE}
Holds the name of the selected ARM architecture.
{PCSTOREOFFSET}
Is the offset between the address of the
STR pc,[...]
or
STM Rb,{..., pc}
instruction and the
value of pc stored out. This varies depending on the CPU or architecture specified.
{ARMASM_VERSION}
Holds an integer that increases with each version. See also Determining the armasm version at
assembly time on page 3-11
|ads$version|
Has the same value as
{ARMASM_VERSION}
.
{INTER}
Has the value True if
/inter
is set. The default is False.
{ROPI}
Has the value True if
/ropi
is set. The default is False.
{RWPI}
Has the value True if
/rwpi
is set. The default is False.
{SWST}
Has the value True if
/swst
is set. The default is False.
{NOSWST}
Has the value True if
/noswst
is set. The default is False.