:orphan:

.. title:: CONFIG_X86_SSE_FP_MATH

.. kconfig:: CONFIG_X86_SSE_FP_MATH

CONFIG_X86_SSE_FP_MATH
######################

*Compiler-generated SSEx instructions for floating point math*

Type: ``bool``

Help
====

.. code-block:: none

    This option allows the compiler to generate SSEx instructions for
    performing floating point math. This can greatly improve performance
    when exactly the same operations are to be performed on multiple
    data objects; however, it can also significantly reduce performance
    when preemptive task switches occur because of the larger register
    set that must be saved and restored.

    Disabling this option means that the compiler utilizes only the
    x87 instruction set for floating point operations.

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

\ :kconfig:`X86_SSE <CONFIG_X86_SSE>` && (\ :kconfig:`FPU <CONFIG_FPU>` || \ :kconfig:`X86_64 <CONFIG_X86_64>`) && \ :kconfig:`X86 <CONFIG_X86>`

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

Defaults
========

No defaults. Implicitly defaults to ``n``.

Symbols that select this symbol
===============================

- \ :kconfig:`SSE_FP_MATH <CONFIG_SSE_FP_MATH>`

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



At ``<Zephyr Architecture>/x86/Kconfig:159``

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

Menu path: (Top) → X86 Architecture Options → x86 Features

.. code-block:: kconfig

    config X86_SSE_FP_MATH
    	bool "Compiler-generated SSEx instructions for floating point math"
    	depends on X86_SSE && (FPU || X86_64) && X86
    	help
    	  This option allows the compiler to generate SSEx instructions for
    	  performing floating point math. This can greatly improve performance
    	  when exactly the same operations are to be performed on multiple
    	  data objects; however, it can also significantly reduce performance
    	  when preemptive task switches occur because of the larger register
    	  set that must be saved and restored.
	  
    	  Disabling this option means that the compiler utilizes only the
    	  x87 instruction set for floating point operations.

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