Add copysignf
Add copysignf

* Fix #692

tralamazza/micropython,Peetz0r/micropython-esp32,dinau/micropython,Timmenem/micropython,martinribelotta/micropython,selste/micropython,matthewelse/micropython,mhoffma/micropython,ryannathans/micropython,xuxiaoxin/micropython,dinau/micropython,bvernoux/micropython,vitiral/micropython,chrisdearman/micropython,turbinenreiter/micropython,ernesto-g/micropython,suda/micropython,SHA2017-badge/micropython-esp32,pozetroninc/micropython,ericsnowcurrently/micropython,orionrobots/micropython,micropython/micropython-esp32,jimkmc/micropython,jlillest/micropython,lbattraw/micropython,martinribelotta/micropython,matthewelse/micropython,ChuckM/micropython,jimkmc/micropython,SHA2017-badge/micropython-esp32,dxxb/micropython,micropython/micropython-esp32,jmarcelino/pycom-micropython,infinnovation/micropython,ryannathans/micropython,suda/micropython,blazewicz/micropython,kostyll/micropython,deshipu/micropython,puuu/micropython,infinnovation/micropython,henriknelson/micropython,torwag/micropython,jimkmc/micropython,selste/micropython,AriZuu/micropython,pramasoul/micropython,danicampora/micropython,ChuckM/micropython,methoxid/micropystat,jmarcelino/pycom-micropython,noahwilliamsson/micropython,redbear/micropython,alex-robbins/micropython,noahchense/micropython,jlillest/micropython,feilongfl/micropython,MrSurly/micropython,adamkh/micropython,selste/micropython,HenrikSolver/micropython,ahotam/micropython,toolmacher/micropython,ceramos/micropython,omtinez/micropython,ruffy91/micropython,TDAbboud/micropython,misterdanb/micropython,alex-march/micropython,alex-robbins/micropython,feilongfl/micropython,tralamazza/micropython,EcmaXp/micropython,alex-march/micropython,deshipu/micropython,mpalomer/micropython,misterdanb/micropython,mianos/micropython,bvernoux/micropython,HenrikSolver/micropython,neilh10/micropython,hosaka/micropython,omtinez/micropython,KISSMonX/micropython,rubencabrera/micropython,SHA2017-badge/micropython-esp32,mianos/micropython,noahchense/micropython,adafruit/circuitpython,suda/micropython,emfcamp/micropython,mianos/micropython,xhat/micropython,firstval/micropython,heisewangluo/micropython,SHA2017-badge/micropython-esp32,rubencabrera/micropython,orionrobots/micropython,toolmacher/micropython,stonegithubs/micropython,Vogtinator/micropython,lbattraw/micropython,utopiaprince/micropython,lbattraw/micropython,oopy/micropython,chrisdearman/micropython,adafruit/micropython,xyb/micropython,hosaka/micropython,xyb/micropython,praemdonck/micropython,trezor/micropython,Timmenem/micropython,ernesto-g/micropython,ryannathans/micropython,mhoffma/micropython,pfalcon/micropython,stonegithubs/micropython,praemdonck/micropython,matthewelse/micropython,chrisdearman/micropython,martinribelotta/micropython,kostyll/micropython,alex-march/micropython,mpalomer/micropython,adafruit/micropython,infinnovation/micropython,adamkh/micropython,warner83/micropython,xyb/micropython,torwag/micropython,tdautc19841202/micropython,EcmaXp/micropython,orionrobots/micropython,galenhz/micropython,ceramos/micropython,supergis/micropython,MrSurly/micropython,ganshun666/micropython,slzatz/micropython,dmazzella/micropython,SungEun-Steve-Kim/test-mp,neilh10/micropython,PappaPeppar/micropython,puuu/micropython,KISSMonX/micropython,firstval/micropython,martinribelotta/micropython,adafruit/micropython,hiway/micropython,SungEun-Steve-Kim/test-mp,hiway/micropython,misterdanb/micropython,adamkh/micropython,adamkh/micropython,SungEun-Steve-Kim/test-mp,adafruit/circuitpython,jlillest/micropython,galenhz/micropython,danicampora/micropython,jmarcelino/pycom-micropython,Peetz0r/micropython-esp32,MrSurly/micropython-esp32,vitiral/micropython,cwyark/micropython,mgyenik/micropython,PappaPeppar/micropython,danicampora/micropython,noahwilliamsson/micropython,warner83/micropython,KISSMonX/micropython,dxxb/micropython,ernesto-g/micropython,suda/micropython,ruffy91/micropython,Vogtinator/micropython,ahotam/micropython,swegener/micropython,praemdonck/micropython,vriera/micropython,noahwilliamsson/micropython,matthewelse/micropython,trezor/micropython,supergis/micropython,xhat/micropython,cnoviello/micropython,ericsnowcurrently/micropython,TDAbboud/micropython,ruffy91/micropython,alex-march/micropython,ernesto-g/micropython,alex-robbins/micropython,kerneltask/micropython,Timmenem/micropython,ericsnowcurrently/micropython,kerneltask/micropython,slzatz/micropython,paul-xxx/micropython,tuc-osg/micropython,cnoviello/micropython,tobbad/micropython,dhylands/micropython,ruffy91/micropython,KISSMonX/micropython,supergis/micropython,cnoviello/micropython,stonegithubs/micropython,blazewicz/micropython,heisewangluo/micropython,cloudformdesign/micropython,stonegithubs/micropython,micropython/micropython-esp32,drrk/micropython,galenhz/micropython,Peetz0r/micropython-esp32,stonegithubs/micropython,henriknelson/micropython,methoxid/micropystat,methoxid/micropystat,aethaniel/micropython,xuxiaoxin/micropython,noahchense/micropython,martinribelotta/micropython,firstval/micropython,rubencabrera/micropython,dhylands/micropython,tobbad/micropython,MrSurly/micropython-esp32,dinau/micropython,tobbad/micropython,EcmaXp/micropython,cloudformdesign/micropython,tobbad/micropython,swegener/micropython,feilongfl/micropython,omtinez/micropython,misterdanb/micropython,danicampora/micropython,misterdanb/micropython,utopiaprince/micropython,dxxb/micropython,ganshun666/micropython,ryannathans/micropython,emfcamp/micropython,supergis/micropython,matthewelse/micropython,oopy/micropython,emfcamp/micropython,selste/micropython,cloudformdesign/micropython,adafruit/circuitpython,HenrikSolver/micropython,adafruit/micropython,mianos/micropython,firstval/micropython,skybird6672/micropython,puuu/micropython,ganshun666/micropython,torwag/micropython,pramasoul/micropython,mpalomer/micropython,hiway/micropython,ericsnowcurrently/micropython,tdautc19841202/micropython,paul-xxx/micropython,henriknelson/micropython,hosaka/micropython,mgyenik/micropython,cwyark/micropython,heisewangluo/micropython,MrSurly/micropython,xhat/micropython,Peetz0r/micropython-esp32,noahchense/micropython,paul-xxx/micropython,lowRISC/micropython,cloudformdesign/micropython,kerneltask/micropython,redbear/micropython,pramasoul/micropython,oopy/micropython,blmorris/micropython,orionrobots/micropython,kostyll/micropython,tuc-osg/micropython,oopy/micropython,deshipu/micropython,mgyenik/micropython,galenhz/micropython,jmarcelino/pycom-micropython,swegener/micropython,noahchense/micropython,HenrikSolver/micropython,slzatz/micropython,mpalomer/micropython,praemdonck/micropython,suda/micropython,micropython/micropython-esp32,henriknelson/micropython,lowRISC/micropython,HenrikSolver/micropython,micropython/micropython-esp32,drrk/micropython,SHA2017-badge/micropython-esp32,blmorris/micropython,bvernoux/micropython,slzatz/micropython,MrSurly/micropython,selste/micropython,adafruit/circuitpython,drrk/micropython,chrisdearman/micropython,methoxid/micropystat,kerneltask/micropython,swegener/micropython,aethaniel/micropython,jmarcelino/pycom-micropython,rubencabrera/micropython,praemdonck/micropython,dhylands/micropython,neilh10/micropython,pozetroninc/micropython,MrSurly/micropython,hosaka/micropython,ceramos/micropython,drrk/micropython,skybird6672/micropython,xuxiaoxin/micropython,pfalcon/micropython,ruffy91/micropython,cnoviello/micropython,feilongfl/micropython,redbear/micropython,pozetroninc/micropython,noahwilliamsson/micropython,tuc-osg/micropython,ceramos/micropython,matthewelse/micropython,toolmacher/micropython,trezor/micropython,xuxiaoxin/micropython,Vogtinator/micropython,MrSurly/micropython-esp32,vriera/micropython,lbattraw/micropython,redbear/micropython,turbinenreiter/micropython,bvernoux/micropython,hosaka/micropython,Peetz0r/micropython-esp32,dmazzella/micropython,tuc-osg/micropython,adamkh/micropython,toolmacher/micropython,kostyll/micropython,paul-xxx/micropython,ceramos/micropython,noahwilliamsson/micropython,methoxid/micropystat,adafruit/circuitpython,blmorris/micropython,firstval/micropython,AriZuu/micropython,emfcamp/micropython,dinau/micropython,supergis/micropython,kerneltask/micropython,dxxb/micropython,turbinenreiter/micropython,vitiral/micropython,lowRISC/micropython,Vogtinator/micropython,vitiral/micropython,utopiaprince/micropython,warner83/micropython,pozetroninc/micropython,emfcamp/micropython,mhoffma/micropython,aethaniel/micropython,xuxiaoxin/micropython,blmorris/micropython,neilh10/micropython,dmazzella/micropython,chrisdearman/micropython,skybird6672/micropython,tdautc19841202/micropython,AriZuu/micropython,tdautc19841202/micropython,utopiaprince/micropython,aethaniel/micropython,tdautc19841202/micropython,tralamazza/micropython,SungEun-Steve-Kim/test-mp,jimkmc/micropython,aethaniel/micropython,SungEun-Steve-Kim/test-mp,kostyll/micropython,puuu/micropython,KISSMonX/micropython,adafruit/circuitpython,Timmenem/micropython,EcmaXp/micropython,PappaPeppar/micropython,drrk/micropython,infinnovation/micropython,bvernoux/micropython,ericsnowcurrently/micropython,pfalcon/micropython,dmazzella/micropython,mhoffma/micropython,ahotam/micropython,mpalomer/micropython,ryannathans/micropython,ganshun666/micropython,TDAbboud/micropython,oopy/micropython,alex-robbins/micropython,mgyenik/micropython,vitiral/micropython,cloudformdesign/micropython,cwyark/micropython,slzatz/micropython,skybird6672/micropython,infinnovation/micropython,ahotam/micropython,mhoffma/micropython,lowRISC/micropython,blazewicz/micropython,turbinenreiter/micropython,xyb/micropython,xyb/micropython,hiway/micropython,heisewangluo/micropython,xhat/micropython,danicampora/micropython,AriZuu/micropython,swegener/micropython,jimkmc/micropython,pramasoul/micropython,ahotam/micropython,rubencabrera/micropython,neilh10/micropython,orionrobots/micropython,lowRISC/micropython,xhat/micropython,ChuckM/micropython,redbear/micropython,pozetroninc/micropython,jlillest/micropython,deshipu/micropython,ChuckM/micropython,blazewicz/micropython,blmorris/micropython,blazewicz/micropython,TDAbboud/micropython,torwag/micropython,turbinenreiter/micropython,utopiaprince/micropython,MrSurly/micropython-esp32,dinau/micropython,adafruit/micropython,tobbad/micropython,MrSurly/micropython-esp32,alex-robbins/micropython,EcmaXp/micropython,tuc-osg/micropython,vriera/micropython,cwyark/micropython,trezor/micropython,puuu/micropython,heisewangluo/micropython,galenhz/micropython,omtinez/micropython,jlillest/micropython,vriera/micropython,pfalcon/micropython,cnoviello/micropython,AriZuu/micropython,dxxb/micropython,trezor/micropython,paul-xxx/micropython,toolmacher/micropython,warner83/micropython,skybird6672/micropython,pramasoul/micropython,dhylands/micropython,deshipu/micropython,ganshun666/micropython,mgyenik/micropython,torwag/micropython,PappaPeppar/micropython,vriera/micropython,lbattraw/micropython,PappaPeppar/micropython,henriknelson/micropython,alex-march/micropython,cwyark/micropython,omtinez/micropython,hiway/micropython,dhylands/micropython,pfalcon/micropython,Timmenem/micropython,feilongfl/micropython,Vogtinator/micropython,ChuckM/micropython,mianos/micropython,warner83/micropython,TDAbboud/micropython,ernesto-g/micropython,tralamazza/micropython