But it looks like Martin uses it on an unsigned char and not on a bit variable. I doubt it will create a problem here. Probably not even suboptimal code.
Maarten > In SDCC, use ! instead of ~ to flip a bit. > > > -----Original Message----- > From: Martin Leopold <[email protected]> > To: [email protected] > Sent: Fri, 16 Jan 2009 9:21 am > Subject: [Sdcc-user] New TinyOS 8051 platform results in non zero exit code > > > > All. > I've recently added ported my 8051-TinyOS to a new platform, and I > thought I might give SDCC a spin, but unfortunately I'm having some > problems (the platform is a SiLabs c8051F340, but I hardly think that is > the problem). I've used the sdcc-nf 2.8.0 distributed with Ubuntu. > > The attached app.c results in a bunch of warnings, but no errors, but > sdcc returns a non zero exit code (at least my makescript says so), so I > suppose something went wrong!? > > The warnings give rise to a different question regarding "~". I'm using > ~ to turn certain bits of in a register, eg. "myreg |= MYBITMASK;myreg > &= ~MYBITMASK". Is there an other convenient way to do the same that > avoids the integer-promotion that the compiler warns about? > > Anyway, the command and errors are: > sdcc -mmcs51 --model-large --no-c-code-in-asm --std-sdcc99 app.c -oapp > build/c8051F340TB/app.c:1221: warning 84: 'auto' variable 'i' may be > used before initialization > build/c8051F340TB/app.c:1610: warning 180: using ~ on bit/bool/unsigned > char variables can give unexpected results due to promotion to int > build/c8051F340TB/app.c:1687: warning 180: using ~ on bit/bool/unsigned > char variables can give unexpected results due to promotion to int > build/c8051F340TB/app.c:1769: warning 85: in function > SchedulerBasicP__TaskBasic__default__runTask unreferenced function > argument : 'id' > build/c8051F340TB/app.c:2002: warning 126: unreachable code > build/c8051F340TB/app.c:2002: warning 126: unreachable code > build/c8051F340TB/app.c:2002: warning 126: unreachable code > > -- > Regards Martin Leopold. > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > SourcForge Community > SourceForge wants to tell your story. > http://p.sf.net/sfu/sf-spreadtheword > > > > _______________________________________________ > Sdcc-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sdcc-user > > ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Sdcc-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sdcc-user
