:orphan:

.. title:: SSE_FP_MATH

.. option:: CONFIG_SSE_FP_MATH

*Compiler-generated SSEx instructions*

Type: ``bool``

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.

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

\ :option:`SSE <CONFIG_SSE>` && \ :option:`CPU_HAS_FPU <CONFIG_CPU_HAS_FPU>` && !\ :option:`X86_64 <CONFIG_X86_64>` && \ :option:`X86 <CONFIG_X86>`

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

Defaults
========

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

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

.. highlight:: kconfig

At ``arch/x86/core/Kconfig.ia32:98``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``arch/Kconfig:12`` → ``arch/x86/Kconfig:319``

Menu path: (Top) → X86 Architecture Options → Processor Capabilities → Architecture Floating Point Options → SSE registers

.. parsed-literal::

    config SSE_FP_MATH
    	bool "Compiler-generated SSEx instructions"
    	depends on \ :option:`SSE <CONFIG_SSE>` && \ :option:`CPU_HAS_FPU <CONFIG_CPU_HAS_FPU>` && !\ :option:`X86_64 <CONFIG_X86_64>` && \ :option:`X86 <CONFIG_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.)*