:orphan:

.. title:: CONFIG_ASSEMBLER_ISA_THUMB2

.. kconfig:: CONFIG_ASSEMBLER_ISA_THUMB2

CONFIG_ASSEMBLER_ISA_THUMB2
###########################

*(No prompt -- not directly user assignable.)*

Type: ``bool``

Help
====

.. code-block:: none

    This helper symbol specifies the default target instruction set for
    the assembler.

    When only the Thumb-2 ISA is supported (i.e. on Cortex-M cores), the
    assembler must use the Thumb-2 instruction set.

    When both the Thumb-2 and ARM ISAs are supported (i.e. on Cortex-A
    and Cortex-R cores), the assembler must use the ARM instruction set
    because the architecture assembly code makes use of the ARM
    instructions.

Direct dependencies
===================

!\ :kconfig:`ISA_ARM <CONFIG_ISA_ARM>` && \ :kconfig:`ARM <CONFIG_ARM>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y if \ :kconfig:`ISA_THUMB2 <CONFIG_ISA_THUMB2>` && !\ :kconfig:`ISA_ARM <CONFIG_ISA_ARM>`

Kconfig definition
==================



At ``<Zephyr Architecture>/arm/core/aarch32/Kconfig:80``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Zephyr Architecture>/Kconfig:12`` → ``<Zephyr Architecture>/arm/Kconfig:57``

Menu path: (Top) → ARM Options

.. code-block:: kconfig

    config ASSEMBLER_ISA_THUMB2
    	bool
    	default y if ISA_THUMB2 && !ISA_ARM
    	depends on !ISA_ARM && ARM
    	help
    	  This helper symbol specifies the default target instruction set for
    	  the assembler.
	  
    	  When only the Thumb-2 ISA is supported (i.e. on Cortex-M cores), the
    	  assembler must use the Thumb-2 instruction set.
	  
    	  When both the Thumb-2 and ARM ISAs are supported (i.e. on Cortex-A
    	  and Cortex-R cores), the assembler must use the ARM instruction set
    	  because the architecture assembly code makes use of the ARM
    	  instructions.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*