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The ARM assembler contains built-in variables for programmer convenience.
The following table shows the built-in variable definitions.
| Variable | Description |
|---|---|
| {PC} or . | Contains the current value of the program location counter. |
| {VAR} or @ | Contains the current value of the storage area location counter. |
| {TRUE} | Contains the logical constant true. |
| {FALSE} | Contains the logical constant false. |
| {OPT} | Contains the 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 in 32-bit program counter mode, and the value 26 if it is in 26-bit mode. |
| {ENDIAN} | Has the value "big" if the assembler is in big-endian mode and the value "little" if it is in little-endian mode. |
| {CODESIZE} | Has the value 16 if compiling Thumb code. Otherwise, it is 32. |
| {CPU} | Has the name of the selected CPU or generic ARM if no CPU is specified. |
| {ARCHITECTURE} | Has the value of the selected ARM architecture: 4 or 4T. |
See Also
ARM Assembler | Predeclared ARM Register Names
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