CONFIG_FPU¶
Enable floating point unit (FPU)
Type: bool
Help¶
This option enables the hardware Floating Point Unit (FPU), in order to
support using the floating point registers and instructions.
When this option is enabled, by default, threads may use the floating
point registers only in an exclusive manner, and this usually means that
only one thread may perform floating point operations.
If it is necessary for multiple threads to perform concurrent floating
point operations, the "FPU register sharing" option must be enabled to
preserve the floating point registers across context switches.
Note that this option cannot be selected for the platforms that do not
include a hardware floating point unit; the floating point support for
those platforms is dependent on the availability of the toolchain-
provided software floating point library.
Direct dependencies¶
(SOC_MCIMX6X_M4 && SOC_SERIES_IMX_6X_M4) || CPU_HAS_FPU
(Includes any dependencies from ifs and menus.)
Default¶
y
Symbols that imply this symbol¶
Kconfig definitions¶
At soc/arm/nxp_imx/mcimx6x_m4/Kconfig.defconfig.mcimx6x_m4:11
Included via Kconfig:8 → Kconfig.zephyr:27 → soc/arm/nxp_imx/Kconfig.defconfig:8 → soc/arm/nxp_imx/mcimx6x_m4/Kconfig.defconfig.series:15
Menu path: (Top)
config FPU
bool
default y
depends on SOC_MCIMX6X_M4 && SOC_SERIES_IMX_6X_M4
At arch/Kconfig:845
Included via Kconfig:8 → Kconfig.zephyr:39
Menu path: (Top) → Floating Point Options
config FPU
bool "Enable floating point unit (FPU)"
depends on CPU_HAS_FPU
help
This option enables the hardware Floating Point Unit (FPU), in order to
support using the floating point registers and instructions.
When this option is enabled, by default, threads may use the floating
point registers only in an exclusive manner, and this usually means that
only one thread may perform floating point operations.
If it is necessary for multiple threads to perform concurrent floating
point operations, the "FPU register sharing" option must be enabled to
preserve the floating point registers across context switches.
Note that this option cannot be selected for the platforms that do not
include a hardware floating point unit; the floating point support for
those platforms is dependent on the availability of the toolchain-
provided software floating point library.
(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)