s390/vx: add support functions for in-kernel FPU use

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Introduce the kernel_fpu_begin() and kernel_fpu_end() function
to enclose any in-kernel use of FPU instructions and registers.
In enclosed sections, you can perform floating-point or vector
(SIMD) computations.  The functions take care of saving and
restoring FPU register contents and controls.

For usage details, see the guidelines in arch/s390/include/asm/fpu/api.h

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Hendrik Brueckner 2015-02-18 14:46:00 +01:00 • committed by Martin Schwidefsky

parent de3fa841e4

commit 0486480802

4 changed files with 335 additions and 1 deletions

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75

arch/s390/include/asm/fpu/api.h

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10

arch/s390/include/asm/fpu/types.h

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2

arch/s390/kernel/Makefile

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249

arch/s390/kernel/fpu.c

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