Thanks Philipp, I have decided to use _Bool from now on: http://palmmicro.com/woody/blog/ar1688/20101208.php
Woody http://palmmicro.com/woody/ ----- Original Message ----- From: "Philipp Klaus Krause" <p...@spth.de> To: <sdcc-user@lists.sourceforge.net> Sent: Wednesday, December 08, 2010 4:52 AM Subject: Re: [Sdcc-user] Z80 --std-c99 and _Bool results in larger code size and slow speed > Am 07.12.2010 16:16, schrieb Lin Rongrong: >> Just tested rev #6078, with TestBoolean function, the compiled size are >> the >> same now, and "_Bool" is 4ms faster than "unsigned char". > > On an original Z80 _Bool should be exactly three clock cycles faster per > loop iteration in your example. In terms of speed this is the main > advantage of _Bool over unsigned char: saving three clock cycles each > time we use it as a condition, be it in the ternary operator, an if/else > or some other control mechanism. > >> Really a fast fix. >> But I am still uncomfortable with "_Bool", as my overall code size is >> still >> a little larger with "_Bool". > > Well there probably are still some places where sdcc generates > unnecessary casts for _Bool, this will improve over time (and the > improvmeent will be faster when users report the issue on this list (as > you did) or as a feature request (which has the advantage of not being > forgotten as easily)). > > Philipp > > ------------------------------------------------------------------------------ > What happens now with your Lotus Notes apps - do you make another costly > upgrade, or settle for being marooned without product support? Time to > move > off Lotus Notes and onto the cloud with Force.com, apps are easier to > build, > use, and manage than apps on traditional platforms. Sign up for the Lotus > Notes Migration Kit to learn more. http://p.sf.net/sfu/salesforce-d2d > _______________________________________________ > Sdcc-user mailing list > Sdcc-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sdcc-user ------------------------------------------------------------------------------ What happens now with your Lotus Notes apps - do you make another costly upgrade, or settle for being marooned without product support? Time to move off Lotus Notes and onto the cloud with Force.com, apps are easier to build, use, and manage than apps on traditional platforms. Sign up for the Lotus Notes Migration Kit to learn more. http://p.sf.net/sfu/salesforce-d2d _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
