On Wed, 9 Dec 2015, Janne Grunau wrote:
The vector mode was deprecated in ARMv7-A/VFPv3 and various cpu
implementations do not support it in hardware. Vector mode code will
depending the OS either be emulated in software or result in an illegal
instruction on cpus which does not support it. This was not really
problem in practice since NEON implementations of the same functions are
preferred. It will however become a problem for checkasm which tests
every cpu flag separately.
Since this is a cpu feature newer cpu do not support anymore the
behaviour of this flag differs from the other flags. It can be only
activated by runtime cpu feature selection.
---
libavutil/arm/cpu.h | 4 ++++
libavutil/cpu.h | 1 +
libavcodec/arm/dcadsp_init_arm.c | 4 ++--
libavcodec/arm/fft_init_arm.c | 2 +-
libavcodec/arm/fmtconvert_init_arm.c | 2 +-
libavutil/arm/cpu.c | 4 ++++
libavutil/cpu.c | 2 ++
tests/checkasm/checkasm.c | 1 +
8 files changed, 16 insertions(+), 4 deletions(-)
This seems ok. Should something else be done for the cases where we lack
runtime detection (like old ARMv6 iOS)? I.e. add something similar within
the non-runtime version of ff_get_cpu_flags_arm?
// Martin
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