+1
added tests for rcp/rsqrt double
added double-version for rcp
added support for fast approximate rsqrt(double). Provide 16 digit accurancy but is over 3x faster than 1/sqrt(double)
added fast approximate rcp(double) accurate to 15 digits
adding __have_native_{rsqrtd,rcpd} to select between native support for double precision reciprocals and using slower but safe version in stdlib
removed __declspec(safe) duplicate
change {rsqrt,rcp}_double to {rsqrt,rcp}d_decl
added support for rsqrtd/rcpd for generic-*.h
added {rsqrt,rcp}d support for sse4.h
first commit for {rsqrt,rcp}d knc support. going to test on other node now
fix packed_store_active2 for knc-i1x8.h
added {rsqrt,rcp}d support for knc.h. test-147.ispc & test-148.ispc pass.
Merge pull request #730 from egaburov/double_math

Added double precision support for reciprocals: rsqrt rcp