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x86: Change order of floating point options

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Changes the order of the floating point options so that the SSE Kconfig options
are not interspersed with the floating point options.

Change-Id: I8390b5049f95b3088e7abf48bf492a544e7f5f50
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
This commit is contained in:
Peter Mitsis 2015-07-31 16:52:22 -04:00 • committed by Anas Nashif
commit 39fc84e65a
1 changed files with 28 additions and 28 deletions
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56
arch/x86/Kconfig
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@ -227,34 +227,6 @@ config FLOAT
Disabling this option means that any task or fiber that uses a
floating point instruction will get a fatal exception.
config SSE
bool
prompt "SSEx instructions"
depends on FLOAT && !CPU_SSE_UNSUPPORTED
default n
help
This option enables the use of SSEx instructions by a task or fiber.
Disabling this option means that no task or fiber may use SSEx
instructions; any such use will result in undefined behavior.
config SSE_FP_MATH
bool
prompt "Compiler-generated SSEx instructions" if FP_SHARING
depends on SSE
default n if FP_SHARING
default y if !FP_SHARING
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 pre-emptive 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.
config FP_SHARING
bool
prompt "Floating point resource sharing" if !ENHANCED_SECURITY
@ -297,6 +269,34 @@ config AUTOMATIC_FP_ENABLING
if SSE is configured, otherwise it is enabled for using x87 FPU or
MMX instructions only.
config SSE
bool
prompt "SSEx instructions"
depends on FLOAT && !CPU_SSE_UNSUPPORTED
default n
help
This option enables the use of SSEx instructions by a task or fiber.
Disabling this option means that no task or fiber may use SSEx
instructions; any such use will result in undefined behavior.
config SSE_FP_MATH
bool
prompt "Compiler-generated SSEx instructions" if FP_SHARING
depends on SSE
default n if FP_SHARING
default y if !FP_SHARING
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 pre-emptive 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.
config XIP
default n