Ok, make it a const function pointer then. And to get rid of the warning add a cast too:
void (* const fp)(void) = (void (*)(void))0xFFF0; fp(); Now it's as small as the inline asm. Maarten > The resulting code using the C version generates this assembly instructions: > > mov _fp,#0xF0 > mov (_fp + 1),#0xFF > . > . > . > mov dpl,_fp > mov dph,(_fp + 1) > lcall __sdcc_call_dptr > > That is 15 bytes of code memory and two bytes of RAM. On the other > hand, the assembly call (within C) > > lcall 0xfff0 > > takes only 3 bytes of code memory. > > Jesus > > At 02:25 PM 18/01/2009, you wrote: > > >Or in C > > > >void (*fp)(void) = 0xfff0; > >fp(); > > > > > > > Try: > > > > > > _asm lcall 0xfff0 _endasm; > > > > > > > > > At 10:59 AM 18/01/2009, Gudjon I. Gudjonsson wrote: > > > > > > >Hi > > > > Sorry once again if the question is silly but I am trying to call > > > > the > > > >PGM_MTP at address 0xFFF0 > > > >function in the in application bootloader for the NXP 8051 > > microcontrollers. > > > >The problem is that I don't know how to put an absolute address on a > > > >function. I know how to absolute address variables but not functions. Can > > > >someone help me. > > > > > > > >Thanks > > > >Gudjon > > > > > > > >----------------------------------------------------------------- > > ------------- > > > >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 > > > >Sdcc-user@lists.sourceforge.net > > > >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 > > > Sdcc-user@lists.sourceforge.net > > > 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 > >Sdcc-user@lists.sourceforge.net > >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 > Sdcc-user@lists.sourceforge.net > 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 Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
