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Add a POWER8 and POWER9 version of the autocorrelation functions.

flac --best is about 3.3x faster on POWER9 with this patch.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>

Use getauxval() to determine if we are on POWER8 or POWER9 or newer.
POWER8 is represented by version 2.07 and POWER9 by version 3.00.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>

Check if the compiler supports __attribute__((target("cpu=power8")))
and __attribute__((target("cpu=power9")))
Signed-off-by: Amitay Isaacs <amitay@ozlabs.org>

Signed-off-by: Amitay Isaacs <amitay@ozlabs.org>

FLAC__CPU_PPC wasn't catching powerpcle or powerpc64le. Fix that and
add a new define for FLAC__CPU_PPC64.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>

We want to create functions with PowerPC VSX instructions, so add
a configure check.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>

We don't have any SPE code, so there's no need to detect it
at configure time.
Signed-off-by: Anton Blanchard <anton@ozlabs.org>

Visual Studio can use GCC (for Android) and Clang (supported toolset) so they must be checked before native compiler.
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

And make sure to reserve the whole file path when not using --output-prefix.

Fixes https://sourceforge.net/p/flac/bugs/463/Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

Found via `codespell -q 3`

Update FLAC__BitReader structure in unit test.

Patch-from: lvqcl <lvqcl.mail@gmail.com>

This is an updtate to the fix for an MSVC 2015 bug in 94a61241.

Patch-from: lvqcl <lvqcl.mail@gmail.com>

The `inline` keyword is only available in C++ so include `share/compat.h`.
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

This is macro identifier is not defined, define it to `0`.

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

Cppcheck was incorrectly warning that `doubletmp` was being used
un-initialized. This was due to the fact that it was being used
and initialized in a pre-processor macro. Chaning the macro to
an inline function stops cppcheck from raising a warning.

This reverts commit b52fa0ec.

See: https://github.com/xiph/flac/commit/b52fa0ec6dc83ec0f430ff7bd7c80485c45728b0

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

The window amplitude is now  normalised to 1.0.
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>

GCC 7 warns about `case` statements which are not separated by a
`break` statement. This warning can be fixed by adding a comment.

Remove redundant assignment before broadcasting into xmm registers.
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>