keep custom double atomic add separate from built in float version
keep custom double atomic add separate from built in float version

dariomangoni/chrono,rserban/chrono,amelmquist/chrono,jcmadsen/chrono,tjolsen/chrono,rserban/chrono,armanpazouki/chrono,projectchrono/chrono,jcmadsen/chrono,tjolsen/chrono,dariomangoni/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,armanpazouki/chrono,jcmadsen/chrono,jcmadsen/chrono,jcmadsen/chrono,andrewseidl/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,projectchrono/chrono,andrewseidl/chrono,armanpazouki/chrono,armanpazouki/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,andrewseidl/chrono,jcmadsen/chrono,tjolsen/chrono,amelmquist/chrono,Milad-Rakhsha/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,amelmquist/chrono,dariomangoni/chrono,armanpazouki/chrono,dariomangoni/chrono,rserban/chrono,amelmquist/chrono,tjolsen/chrono,projectchrono/chrono,amelmquist/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,projectchrono/chrono,rserban/chrono,dariomangoni/chrono,tjolsen/chrono,rserban/chrono,rserban/chrono,amelmquist/chrono