correcting/polishing  abs, fabs and fabsf are better in scalar for float and double
cutting commentaries in common file that pertain to sse
correcting/oxygenating idivceil which is now generic
divfloor no more depends of idivfloor
wrong shift in divs caused corner error. Corrected and added tests
correcting/oxygenating/testing divfix.hpp
correcting/oxygenating/testing idivfix.hpp plus forgotten include in divceil.cpp
typos of oxygenation of first files in arithmetic from abs to divround2even
some oxygenation in arithmetic files
some oxygenation in arithmetic files 2
homogeneization of divxxx idivxxx and ixxx
tests for divround2even and divround
oxygenation for remaining files in base arithmetic
polishing scalar unit tests for arithmetic
idivxxx are generic
idivfloor is generic
polishing some simd unit tests for arithmetic
correcting bug in oneminus and suppressing support of remainder for unsigned

in the computation of remainder in is possible that for 2 positive inputs the result be negative, (this is not the case for
rem and mod
polishing simd unit tests in arithmetic
on more oxygenation turn on arithmetic