divide optimisations

Date	2016-01-09 13:12
From	Peter Burgess
Subject	divide optimisations
	will csound optimise x / 2, x / 4, x / 8, etc.. into bitshifts? I'm wondering if I should be careful to write these as x * 0.5, x * 0.25 etc. Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2016-01-09 14:37
From	jpff
Subject	Re: divide optimisations
	No as csound is all floating point; multiply is neter than divide but tat might be optimised - not sure On Sat, 9 Jan 2016, Peter Burgess wrote: > will csound optimise x / 2, x / 4, x / 8, etc.. into bitshifts? I'm > wondering if I should be careful to write these as x * 0.5, x * 0.25 > etc. > > Csound mailing list > Csound@listserv.heanet.ie > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2016-01-09 14:45
From	Peter Burgess
Subject	Re: divide optimisations
	Ah right yeah. so will it maybe just decrease the exponent by 1, 2, or 3 and still make for a fairly swift calculation? On Sat, Jan 9, 2016 at 2:37 PM, jpff wrote: > No as csound is all floating point; multiply is neter than divide but tat > might be optimised - not sure > > > On Sat, 9 Jan 2016, Peter Burgess wrote: > >> will csound optimise x / 2, x / 4, x / 8, etc.. into bitshifts? I'm >> wondering if I should be careful to write these as x * 0.5, x * 0.25 >> etc. >> >> Csound mailing list >> Csound@listserv.heanet.ie >> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here >> > > Csound mailing list > Csound@listserv.heanet.ie > https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2016-01-09 14:48
From	Peter Burgess
Subject	Re: divide optimisations
	Being written in C, will it depend on what C would do? On Sat, Jan 9, 2016 at 2:45 PM, Peter Burgess wrote: > Ah right yeah. so will it maybe just decrease the exponent by 1, 2, or > 3 and still make for a fairly swift calculation? > > On Sat, Jan 9, 2016 at 2:37 PM, jpff wrote: >> No as csound is all floating point; multiply is neter than divide but tat >> might be optimised - not sure >> >> >> On Sat, 9 Jan 2016, Peter Burgess wrote: >> >>> will csound optimise x / 2, x / 4, x / 8, etc.. into bitshifts? I'm >>> wondering if I should be careful to write these as x * 0.5, x * 0.25 >>> etc. >>> >>> Csound mailing list >>> Csound@listserv.heanet.ie >>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND >>> Send bugs reports to >>> https://github.com/csound/csound/issues >>> Discussions of bugs and features can be posted here >>> >> >> Csound mailing list >> Csound@listserv.heanet.ie >> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here