3.4. Built-in variables

Table 3.1 lists the built-in variables defined by the ARM assembler.

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
|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.

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"

|ads$version| must be all lower case. The other built-in variables can be upper-case, lower-case, or mixed.

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