CONFIG_MATHEMU: Kernel FP software completion

General informations

The Linux kernel configuration item CONFIG_MATHEMU has multiple definitions:

Kernel FP software completion found in arch/alpha/Kconfig.debug

The configuration item CONFIG_MATHEMU:

• prompt: Kernel FP software completion
• type: tristate
• depends on: ( CONFIG_DEBUG_KERNEL && ! CONFIG_SMP ) && (! CONFIG_DEBUG_KERNEL || CONFIG_SMP )
• defined in arch/alpha/Kconfig.debug
• found in Linux kernels: 2.6.9–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.14, 6.15-rc+HEAD
• modules built: math-emu, math, math, qrnnd, qrnnd

Help text

This option is required for IEEE compliant floating point arithmetic on the Alpha. The only time you would ever not say Y is to say M in order to debug the code. Say Y unless you know what you are doing.

IEEE FPU emulation found in arch/s390/Kconfig

The configuration item CONFIG_MATHEMU:

• prompt: IEEE FPU emulation
• type: bool
• depends on: CONFIG_MARCH_G5
• defined in arch/s390/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.39, 3.0–3.19, 4.0
• modules built: math-emu, math, math, qrnnd, qrnnd

Help text

This option is required for IEEE compliant floating point arithmetic on older ESA/390 machines. Say Y unless you know your machine doesn't need this.

Kernel FP software completion found in arch/alpha/Kconfig

The configuration item CONFIG_MATHEMU:

• prompt: Kernel FP software completion
• type: tristate
• depends on: ( CONFIG_DEBUG_KERNEL && ! CONFIG_SMP ) && (! CONFIG_DEBUG_KERNEL || CONFIG_SMP )
• defined in arch/alpha/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.8
• modules built: math-emu, math, math, qrnnd, qrnnd

Help text

This option is required for IEEE compliant floating point arithmetic on the Alpha. The only time you would ever not say Y is to say M in order to debug the code. Say Y unless you know what you are doing.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module math CONFIG_MATHEMU : arch/alpha/Kconfig : "Kernel FP software completion" # in 2.5.45–2.5.75, 2.6.0–2.6.8
• lkddb module math CONFIG_MATHEMU : arch/alpha/Kconfig.debug : "Kernel FP software completion" # in 2.6.9–2.6.39, 3.0–3.19, 4.0
• lkddb module math-emu CONFIG_MATHEMU : arch/alpha/Kconfig.debug : "Kernel FP software completion" # in 4.1–4.20, 5.0–5.19, 6.0–6.14, 6.15-rc+HEAD
• lkddb module qrnnd CONFIG_MATHEMU : arch/alpha/Kconfig : "Kernel FP software completion" # in 2.5.45–2.5.75, 2.6.0–2.6.8
• lkddb module qrnnd CONFIG_MATHEMU : arch/alpha/Kconfig.debug : "Kernel FP software completion" # in 2.6.9–2.6.20

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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