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FFmpeg/libavutil/arm

History

Martin Storsjö 7b0c7c9163 arm: Detect 32 bit cpu features on ARMv8 when running on a 64 bit kernel ... When running on a 64 bit kernel, /proc/cpuinfo lists different optional features than on 32 bit kernels (because some of them are mandatory in the 64 bit implemenations). The kernel does list the old features properly if they are queried via /proc/self/auxv though - however this file is not always readable (e.g. on most android systems). The getauxval function could also provide the same info as /proc/self/auxv even if this file isn't readable, but this function is not always available (and thus would need to be loaded with dlsym for compatibility with older android versions). The android cpufeatures library does this slightly differently, by assuming that these are available if the "CPU architecture" line is >= 8, see [1] for details. It has been suggested to include the old, non-optional features in /proc/cpuinfo as well, but that suggested patch never was merged. See [2] for the discussion around this suggestion. [1] https://android-review.googlesource.com/91380 [2] http://marc.info/?l=linux-arm-kernel&m=139087240101974 Signed-off-by: Martin Storsjö <martin@martin.st>		11 years ago
..
Makefile	arm: rename ARMVFP config symbol to VFP	12 years ago
asm.S	build: check if AS supports the '.func' directive	11 years ago
bswap.h	arm: use HAVE*_INLINE/EXTERNAL macros for conditional compilation	12 years ago
cpu.c	arm: Detect 32 bit cpu features on ARMv8 when running on a 64 bit kernel	11 years ago
cpu.h	avutil: Refactor CPU extension availability macros	11 years ago
float_dsp_arm.h	arm: float_dsp: Propagate cpu_flags to vfp initialization function	11 years ago
float_dsp_init_arm.c	Update dsputil- and SIMD-related comments to match reality more closely	11 years ago
float_dsp_init_neon.c	avutil: Add av_cold attributes to init functions missing them	12 years ago
float_dsp_init_vfp.c	arm: float_dsp: Propagate cpu_flags to vfp initialization function	11 years ago
float_dsp_neon.S	floatdsp: move scalarproduct_float from dsputil to avfloatdsp.	12 years ago
float_dsp_vfp.S	floatdsp: move vector_fmul_reverse from dsputil to avfloatdsp.	12 years ago
intmath.h	arm: use HAVE*_INLINE/EXTERNAL macros for conditional compilation	12 years ago
intreadwrite.h	ARM: use Q/R inline asm operand modifiers only if supported	12 years ago
neontest.h	arm: Add an option for making sure NEON registers aren't clobbered	11 years ago
timer.h	Replace FFmpeg with Libav in licence headers	14 years ago