Advise the compiler that the store is eventually going to a uint8_t
buffer. This helps avoid getting alignment hints which would cause the
memory access to fail.
Originally added as a workaround for clang:
https://bugs.llvm.org//show_bug.cgi?id=24421
Change-Id: Ie9854b777cfb2f4baaee66764f0e51dcb094d51e
This function was removed when clang started introducing alignment hints
which caused the 32 bit vld1_lane_u32/vst1_lane_u32 to fail:
https://llvm.org/bugs/show_bug.cgi?id=24421
The load has been rendered safe with an implementation ~indiscernible
performance-wise that uses _u8 and over-reads just a touch.
It is still ~5x faster than C in the unaligned case and doing both
filters.
BUG=webm:892
BUG=webm:1273
Change-Id: Icf7167189391b46202f47233bb585c24c42bcc36
These implementations rely on casting the pointers to load the data.
Clang implemented optimizations which automatically add alignment hints
to such loads. The 4x4 filters do not guarantee the necessary alignment
so the resulting assembly is broken.
https://llvm.org/bugs/show_bug.cgi?id=24421
BUG=webm:817
BUG=webm:892
Change-Id: I608885299f1f86ff83653b65e0e40d0ae87fb3fe
make bifilter4_coeff[][] uint8_t, no values exceed this range and
they're loaded with vdup_n_u8().
Change-Id: I921983e9edd828d29820e40ac30a7801dbe0fb4f
Filter out files ending in _neon.c and append .neon so the Android build
system knows to apply -mfpu=neon
Change-Id: Ib67277e5920bfcaeda7c4aa16cd1001b11d59305
