Re: Bitshift Opcode Efficiency

Date	2015-07-12 20:30
From	jpff
Subject	Re: Bitshift Opcode Efficiency
	>> Are the bitshift opcodes more efficient cpu-wise than the >> multiplication and division opcodes, or are they just doing >> multiplication and division in their code, too. it converts the floating point numbers to integer, and then uses bit operations. Then casts back to float/double. Not that ceap. ==John ffitch ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-07-13 04:50
From	andy fillebrown
Subject	Re: Bitshift Opcode Efficiency
	It was probably more useful when Csound was using integer processing internally? On Sun, Jul 12, 2015 at 3:30 PM, jpff wrote: >>> Are the bitshift opcodes more efficient cpu-wise than the >>> multiplication and division opcodes, or are they just doing >>> multiplication and division in their code, too. > > it converts the floating point numbers to integer, and then uses bit > operations. Then casts back to float/double. Not that ceap. > ==John ffitch > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-07-13 08:33
From	Victor Lazzarini
Subject	Re: Bitshift Opcode Efficiency
	I am not sure it ever did, discounting the sharc version. Victor Lazzarini Dean of Arts, Celtic Studies, and Philosophy Maynooth University Ireland > On 13 Jul 2015, at 04:50, andy fillebrown wrote: > > It was probably more useful when Csound was using integer processing internally? > > On Sun, Jul 12, 2015 at 3:30 PM, jpff wrote: >>>> Are the bitshift opcodes more efficient cpu-wise than the >>>> multiplication and division opcodes, or are they just doing >>>> multiplication and division in their code, too. >> >> it converts the floating point numbers to integer, and then uses bit >> operations. Then casts back to float/double. Not that ceap. >> ==John ffitch >> >> ------------------------------------------------------------------------------ >> Don't Limit Your Business. Reach for the Cloud. >> GigeNET's Cloud Solutions provide you with the tools and support that >> you need to offload your IT needs and focus on growing your business. >> Configured For All Businesses. Start Your Cloud Today. >> https://www.gigenetcloud.com/ >> _______________________________________________ >> Csound-users mailing list >> Csound-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/csound-users >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Date	2015-07-13 11:42
From	jpff
Subject	Re: Bitshift Opcode Efficiency
	I agree. Been floatig point wcer since I was involved (circa 1990) excetBarry's version. The opcodes were contributed by a user, providing functionaliy in the main ==John ff On Mon, 13 Jul 2015, Victor Lazzarini wrote: > I am not sure it ever did, discounting the sharc version. > > Victor Lazzarini > Dean of Arts, Celtic Studies, and Philosophy > Maynooth University > Ireland > >> On 13 Jul 2015, at 04:50, andy fillebrown wrote: >> >> It was probably more useful when Csound was using integer processing internally? >> >> On Sun, Jul 12, 2015 at 3:30 PM, jpff wrote: >>>>> Are the bitshift opcodes more efficient cpu-wise than the >>>>> multiplication and division opcodes, or are they just doing >>>>> multiplication and division in their code, too. >>> >>> it converts the floating point numbers to integer, and then uses bit >>> operations. Then casts back to float/double. Not that ceap. >>> ==John ffitch >>> >>> ------------------------------------------------------------------------------ >>> Don't Limit Your Business. Reach for the Cloud. >>> GigeNET's Cloud Solutions provide you with the tools and support that >>> you need to offload your IT needs and focus on growing your business. >>> Configured For All Businesses. Start Your Cloud Today. >>> https://www.gigenetcloud.com/ >>> _______________________________________________ >>> Csound-users mailing list >>> Csound-users@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/csound-users >>> Send bugs reports to >>> https://github.com/csound/csound/issues >>> Discussions of bugs and features can be posted here >> >> ------------------------------------------------------------------------------ >> Don't Limit Your Business. Reach for the Cloud. >> GigeNET's Cloud Solutions provide you with the tools and support that >> you need to offload your IT needs and focus on growing your business. >> Configured For All Businesses. Start Your Cloud Today. >> https://www.gigenetcloud.com/ >> _______________________________________________ >> Csound-users mailing list >> Csound-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/csound-users >> Send bugs reports to >> https://github.com/csound/csound/issues >> Discussions of bugs and features can be posted here > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > Csound-users mailing list > Csound-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/csound-users > Send bugs reports to > https://github.com/csound/csound/issues > Discussions of bugs and features can be posted here > ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Csound-users mailing list Csound-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/csound-users Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here