Fix exp2, log2 fallback functions.
Fix exp2, log2 fallback functions.

tynn/numpy,pizzathief/numpy,stefanv/numpy,brandon-rhodes/numpy,GaZ3ll3/numpy,njase/numpy,Srisai85/numpy,rajathkumarmp/numpy,jankoslavic/numpy,ogrisel/numpy,pizzathief/numpy,GaZ3ll3/numpy,tacaswell/numpy,ekalosak/numpy,GrimDerp/numpy,mingwpy/numpy,madphysicist/numpy,stefanv/numpy,ChristopherHogan/numpy,charris/numpy,githubmlai/numpy,drasmuss/numpy,jschueller/numpy,pelson/numpy,githubmlai/numpy,mortada/numpy,numpy/numpy-refactor,pdebuyl/numpy,solarjoe/numpy,stuarteberg/numpy,naritta/numpy,tacaswell/numpy,rajathkumarmp/numpy,skymanaditya1/numpy,jakirkham/numpy,embray/numpy,mortada/numpy,andsor/numpy,matthew-brett/numpy,sigma-random/numpy,Dapid/numpy,seberg/numpy,rgommers/numpy,seberg/numpy,BabeNovelty/numpy,moreati/numpy,ViralLeadership/numpy,Linkid/numpy,abalkin/numpy,numpy/numpy-refactor,brandon-rhodes/numpy,ChanderG/numpy,naritta/numpy,hainm/numpy,joferkington/numpy,cjermain/numpy,behzadnouri/numpy,stefanv/numpy,BMJHayward/numpy,ahaldane/numpy,joferkington/numpy,GrimDerp/numpy,embray/numpy,ssanderson/numpy,dimasad/numpy,mwiebe/numpy,ahaldane/numpy,sinhrks/numpy,dch312/numpy,KaelChen/numpy,BabeNovelty/numpy,anntzer/numpy,Eric89GXL/numpy,Dapid/numpy,MaPePeR/numpy,Yusa95/numpy,BMJHayward/numpy,ajdawson/numpy,ekalosak/numpy,githubmlai/numpy,MichaelAquilina/numpy,chatcannon/numpy,naritta/numpy,nbeaver/numpy,mwiebe/numpy,ewmoore/numpy,embray/numpy,chiffa/numpy,rhythmsosad/numpy,empeeu/numpy,felipebetancur/numpy,kiwifb/numpy,rhythmsosad/numpy,mingwpy/numpy,dwillmer/numpy,has2k1/numpy,yiakwy/numpy,joferkington/numpy,jakirkham/numpy,yiakwy/numpy,stuarteberg/numpy,pbrod/numpy,pyparallel/numpy,rhythmsosad/numpy,jakirkham/numpy,rherault-insa/numpy,ahaldane/numpy,utke1/numpy,solarjoe/numpy,MSeifert04/numpy,dimasad/numpy,Linkid/numpy,andsor/numpy,ChristopherHogan/numpy,MSeifert04/numpy,ogrisel/numpy,kirillzhuravlev/numpy,bertrand-l/numpy,jankoslavic/numpy,jonathanunderwood/numpy,astrofrog/numpy,leifdenby/numpy,bertrand-l/numpy,stuarteberg/numpy,pyparallel/numpy,dato-code/numpy,immerrr/numpy,AustereCuriosity/numpy,seberg/numpy,skymanaditya1/numpy,dato-code/numpy,mattip/numpy,andsor/numpy,GaZ3ll3/numpy,matthew-brett/numpy,pelson/numpy,bmorris3/numpy,numpy/numpy-refactor,pizzathief/numpy,jorisvandenbossche/numpy,mingwpy/numpy,rherault-insa/numpy,pelson/numpy,NextThought/pypy-numpy,bringingheavendown/numpy,charris/numpy,pbrod/numpy,pdebuyl/numpy,numpy/numpy,numpy/numpy,brandon-rhodes/numpy,BabeNovelty/numpy,b-carter/numpy,tdsmith/numpy,BMJHayward/numpy,b-carter/numpy,SunghanKim/numpy,gfyoung/numpy,njase/numpy,NextThought/pypy-numpy,MaPePeR/numpy,jankoslavic/numpy,chatcannon/numpy,dwf/numpy,moreati/numpy,dwillmer/numpy,matthew-brett/numpy,MSeifert04/numpy,ddasilva/numpy,jankoslavic/numpy,maniteja123/numpy,ChristopherHogan/numpy,Anwesh43/numpy,mathdd/numpy,ssanderson/numpy,WarrenWeckesser/numpy,jorisvandenbossche/numpy,stuarteberg/numpy,ViralLeadership/numpy,pdebuyl/numpy,immerrr/numpy,ekalosak/numpy,larsmans/numpy,NextThought/pypy-numpy,dato-code/numpy,skwbc/numpy,Anwesh43/numpy,ChanderG/numpy,Yusa95/numpy,hainm/numpy,sigma-random/numpy,Anwesh43/numpy,KaelChen/numpy,WarrenWeckesser/numpy,abalkin/numpy,rgommers/numpy,bertrand-l/numpy,skymanaditya1/numpy,bringingheavendown/numpy,Anwesh43/numpy,rudimeier/numpy,chatcannon/numpy,anntzer/numpy,ewmoore/numpy,simongibbons/numpy,larsmans/numpy,nbeaver/numpy,CMartelLML/numpy,pelson/numpy,nguyentu1602/numpy,skwbc/numpy,rhythmsosad/numpy,cowlicks/numpy,mindw/numpy,dimasad/numpy,ewmoore/numpy,kirillzhuravlev/numpy,pyparallel/numpy,trankmichael/numpy,ddasilva/numpy,SiccarPoint/numpy,mhvk/numpy,hainm/numpy,numpy/numpy,Linkid/numpy,kiwifb/numpy,charris/numpy,cjermain/numpy,grlee77/numpy,GrimDerp/numpy,embray/numpy,maniteja123/numpy,gfyoung/numpy,groutr/numpy,sigma-random/numpy,MSeifert04/numpy,ajdawson/numpy,naritta/numpy,gmcastil/numpy,endolith/numpy,nguyentu1602/numpy,kiwifb/numpy,rmcgibbo/numpy,dch312/numpy,madphysicist/numpy,trankmichael/numpy,musically-ut/numpy,dato-code/numpy,pdebuyl/numpy,jonathanunderwood/numpy,embray/numpy,tdsmith/numpy,tynn/numpy,MaPePeR/numpy,sinhrks/numpy,pbrod/numpy,joferkington/numpy,behzadnouri/numpy,dwillmer/numpy,jonathanunderwood/numpy,kirillzhuravlev/numpy,ESSS/numpy,immerrr/numpy,Yusa95/numpy,SunghanKim/numpy,astrofrog/numpy,argriffing/numpy,shoyer/numpy,cowlicks/numpy,moreati/numpy,CMartelLML/numpy,rudimeier/numpy,jschueller/numpy,SunghanKim/numpy,KaelChen/numpy,numpy/numpy-refactor,empeeu/numpy,drasmuss/numpy,SiccarPoint/numpy,ogrisel/numpy,empeeu/numpy,astrofrog/numpy,endolith/numpy,andsor/numpy,ChanderG/numpy,simongibbons/numpy,mattip/numpy,mindw/numpy,has2k1/numpy,KaelChen/numpy,tdsmith/numpy,has2k1/numpy,rajathkumarmp/numpy,sonnyhu/numpy,ewmoore/numpy,yiakwy/numpy,Srisai85/numpy,trankmichael/numpy,gmcastil/numpy,grlee77/numpy,larsmans/numpy,jorisvandenbossche/numpy,rmcgibbo/numpy,pbrod/numpy,sinhrks/numpy,groutr/numpy,ChristopherHogan/numpy,maniteja123/numpy,rmcgibbo/numpy,solarjoe/numpy,WarrenWeckesser/numpy,numpy/numpy-refactor,skymanaditya1/numpy,jakirkham/numpy,ogrisel/numpy,matthew-brett/numpy,shoyer/numpy,pizzathief/numpy,sonnyhu/numpy,shoyer/numpy,anntzer/numpy,ViralLeadership/numpy,SunghanKim/numpy,grlee77/numpy,argriffing/numpy,mathdd/numpy,argriffing/numpy,ContinuumIO/numpy,charris/numpy,musically-ut/numpy,CMartelLML/numpy,tacaswell/numpy,mindw/numpy,dwillmer/numpy,ssanderson/numpy,WarrenWeckesser/numpy,njase/numpy,ajdawson/numpy,ContinuumIO/numpy,NextThought/pypy-numpy,groutr/numpy,shoyer/numpy,yiakwy/numpy,SiccarPoint/numpy,pizzathief/numpy,SiccarPoint/numpy,mathdd/numpy,mhvk/numpy,rmcgibbo/numpy,jschueller/numpy,bmorris3/numpy,ewmoore/numpy,jschueller/numpy,BMJHayward/numpy,gfyoung/numpy,BabeNovelty/numpy,rudimeier/numpy,rudimeier/numpy,CMartelLML/numpy,dwf/numpy,cowlicks/numpy,chiffa/numpy,jorisvandenbossche/numpy,ahaldane/numpy,Eric89GXL/numpy,shoyer/numpy,leifdenby/numpy,nguyentu1602/numpy,utke1/numpy,dch312/numpy,Srisai85/numpy,leifdenby/numpy,dwf/numpy,mortada/numpy,drasmuss/numpy,hainm/numpy,grlee77/numpy,musically-ut/numpy,nguyentu1602/numpy,rajathkumarmp/numpy,immerrr/numpy,gmcastil/numpy,mattip/numpy,jakirkham/numpy,ddasilva/numpy,ekalosak/numpy,WillieMaddox/numpy,dimasad/numpy,ESSS/numpy,sigma-random/numpy,mhvk/numpy,tdsmith/numpy,mindw/numpy,musically-ut/numpy,has2k1/numpy,WarrenWeckesser/numpy,ajdawson/numpy,MichaelAquilina/numpy,mattip/numpy,madphysicist/numpy,ahaldane/numpy,Eric89GXL/numpy,cowlicks/numpy,rherault-insa/numpy,tynn/numpy,mhvk/numpy,cjermain/numpy,jorisvandenbossche/numpy,ContinuumIO/numpy,felipebetancur/numpy,stefanv/numpy,nbeaver/numpy,dwf/numpy,Dapid/numpy,behzadnouri/numpy,rgommers/numpy,Linkid/numpy,ChanderG/numpy,seberg/numpy,pbrod/numpy,skwbc/numpy,simongibbons/numpy,ogrisel/numpy,sinhrks/numpy,astrofrog/numpy,GrimDerp/numpy,utke1/numpy,matthew-brett/numpy,Eric89GXL/numpy,WillieMaddox/numpy,mathdd/numpy,MichaelAquilina/numpy,dwf/numpy,mhvk/numpy,AustereCuriosity/numpy,trankmichael/numpy,larsmans/numpy,bmorris3/numpy,simongibbons/numpy,GaZ3ll3/numpy,ESSS/numpy,simongibbons/numpy,WillieMaddox/numpy,Srisai85/numpy,felipebetancur/numpy,mortada/numpy,b-carter/numpy,mwiebe/numpy,astrofrog/numpy,grlee77/numpy,mingwpy/numpy,bringingheavendown/numpy,sonnyhu/numpy,rgommers/numpy,githubmlai/numpy,sonnyhu/numpy,pelson/numpy,stefanv/numpy,MaPePeR/numpy,empeeu/numpy,Yusa95/numpy,abalkin/numpy,dch312/numpy,bmorris3/numpy,chiffa/numpy,endolith/numpy,AustereCuriosity/numpy,madphysicist/numpy,cjermain/numpy,kirillzhuravlev/numpy,MSeifert04/numpy,brandon-rhodes/numpy,MichaelAquilina/numpy,numpy/numpy,madphysicist/numpy,felipebetancur/numpy,anntzer/numpy,endolith/numpy