Initialize regs variable
Cosmetics
Revert "Obtain M_PI by defining _USE_MATH_DEFINES"

This reverts commit 48cdcdb8b29bc8629590c0c6b31c6e0b08e1e3c3.
Rename pi constant to avoid conflict with POSIX
Merge pull request #1 from dubhater/autotools

Add build system for Unix
Add missing includes
Rename SSE2 unresize class to UnresizeImplSSE2
Fix handling of boundary conditions in unresize SSE2 core
AVX2 unresize core. Up to 20% faster
Generalize unresize AVX2 core to support f16 as well. Up to 40% faster
Fix incorrect coefficient order in horizontal vector back substitution pass
Special case unresize horizontal SIMD cores for narrow filters, 7% speedup
Factor MatrixOperation implementations into a base class
Cosmetics
Cosmetics
Avoid possible overflows due to multiplication of ints
Prefix header guards with module name
cpuid/gcc: Add missing paren

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
build: Make out-of-tree builds work

Include directories need to take the base dir into account.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
resize/sse2: Remove unused variable

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>