ARM: vfp: add VFPv4 capability detection and populate elf_hwcap

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The presence of VFPv4 cannot be detected simply by looking at the FPSID
subarchitecture field, as a value >= 2 signifies the architecture as
VFPv3 or later.

This patch reads from MVFR1 to check whether or not the fused multiply
accumulate instructions are supported. Since these are introduced with
VFPv4, this tells us what we need to know.

Signed-off-by: Will Deacon <will.deacon@arm.com>

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This commit is contained in:

Will Deacon 2011-06-08 11:42:43 +01:00

parent 254cdf8ec3

commit 18b9dc130c

1 changed files with 4 additions and 2 deletions

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arch/arm/vfp/vfpmodule.c

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