Fixed dec header guard
Altivec abs
Altivec saturated abs
Altivec saturated add
Altivec bitwise_andnot
Altivec bitwise_notand
Altivec ceil
Altivec tofloat
Altivec max
Altivec min
Altivec trunc
Altivec toints
Altivec interleave_first
Altivec interleave_second
Altivec subs
Altivec group
Altivec groups
Max/Min works on arithmetic
Fix is_not_equal_with_equal_nans to use better algorithm
Fix guard in vmx/altivec/interleave_second.hpp