:orphan:

.. title:: ASSEMBLER_ISA_THUMB2

.. option:: CONFIG_ASSEMBLER_ISA_THUMB2

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

Type: ``bool``

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.

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

!\ :option:`ISA_ARM <CONFIG_ISA_ARM>` && !\ :option:`ARM64 <CONFIG_ARM64>` && \ :option:`ARM <CONFIG_ARM>`

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

Default
=======

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

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

.. highlight:: kconfig

At ``arch/arm/core/aarch32/Kconfig:76``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``arch/Kconfig:12`` → ``arch/arm/Kconfig:42``

Menu path: (Top) → ARM Options

.. parsed-literal::

    config ASSEMBLER_ISA_THUMB2
    	bool
    	default y if \ :option:`ISA_THUMB2 <CONFIG_ISA_THUMB2>` && !\ :option:`ISA_ARM <CONFIG_ISA_ARM>`
    	depends on !\ :option:`ISA_ARM <CONFIG_ISA_ARM>` && !\ :option:`ARM64 <CONFIG_ARM64>` && \ :option:`ARM <CONFIG_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.)*