[fpc-pascal] selecting target processor
Hi, how can I tell fpc to use only instructions supported on a specific processor? I'm compiling on an athlon for running on a geode (restriction has to define instruction set from x686 to x586, I think). Sometimes my program crashes on the target machine with signal 4 (illegal instruction). TIA, Marc ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] selecting target processor
On 19 Jun 2005, at 20:48, Marc Santhoff wrote: how can I tell fpc to use only instructions supported on a specific processor? I'm compiling on an athlon for running on a geode (restriction has to define instruction set from x686 to x586, I think). In theory, the code generated by FPC should always run on an i386 (even if you use e.g. -Op3), unless you use some special command line switches I cannot find in the help. Other behaviour indicates a bug. Can you figure out which instruction it is that causes this? Jonas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] selecting target processor
Jonas Maebe wrote: > > On 19 Jun 2005, at 20:48, Marc Santhoff wrote: > >> how can I tell fpc to use only instructions supported on a specific >> processor? >> >> I'm compiling on an athlon for running on a geode (restriction has to >> define instruction set from x686 to x586, I think). > > > In theory, the code generated by FPC should always run on an i386 (even > if you use e.g. -Op3), unless you use some special command line > switches I cannot find in the help. -C code generation options: -Cc set default calling convention to -CDcreate also dynamic library (not supported) -CeCompilation with emulated floating point opcodes -Cf Select fpu instruction set to use, see fpc -i for possible values -CgGenerate PIC code -Ch bytes heap (between 1023 and 67107840) -CiIO-checking -Cnomit linking stage -Cocheck overflow of integer operations -Cp select instruction set, see fpc -i for possible values That is it :) > Other behaviour indicates a bug. > Can you figure out which instruction it is that causes this? > > > Jonas > > > ___ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] selecting target processor
Date sent: Sun, 19 Jun 2005 22:49:44 +0200 From: Florian Klaempfl <[EMAIL PROTECTED]> To: FPC-Pascal users discussions Subject:Re: [fpc-pascal] selecting target processor Send reply to: FPC-Pascal users discussions > > On 19 Jun 2005, at 20:48, Marc Santhoff wrote: > > > >> how can I tell fpc to use only instructions supported on a specific > >> processor? > >> > >> I'm compiling on an athlon for running on a geode (restriction has > >> to define instruction set from x686 to x586, I think). > > > > In theory, the code generated by FPC should always run on an i386 > > (even if you use e.g. -Op3), unless you use some special command > > line switches I cannot find in the help. > > -C code generation options: > -Cc set default calling convention to > -CDcreate also dynamic library (not supported) > -CeCompilation with emulated floating point opcodes > -Cf Select fpu instruction set to use, see fpc -i for > possible values > -CgGenerate PIC code > -Ch bytes heap (between 1023 and 67107840) > -CiIO-checking > -Cnomit linking stage > -Cocheck overflow of integer operations > -Cp select instruction set, see fpc -i for possible > values > > That is it :) Nice can of worms I haven't been aware of... ;-) So what is the best - Cp option for my Athlon then? ;-))) And what would be correct for AMD K6 and all other non-Intel CPUs > 386? Looks as a lot of work for Michael... Tomas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] selecting target processor
Tomas Hajny wrote: > Date sent:Sun, 19 Jun 2005 22:49:44 +0200 > From: Florian Klaempfl <[EMAIL PROTECTED]> > To: FPC-Pascal users discussions > > Subject: Re: [fpc-pascal] selecting target processor > Send reply to:FPC-Pascal users discussions > > > > > >>>On 19 Jun 2005, at 20:48, Marc Santhoff wrote: >>> >>> how can I tell fpc to use only instructions supported on a specific processor? I'm compiling on an athlon for running on a geode (restriction has to define instruction set from x686 to x586, I think). >>> >>>In theory, the code generated by FPC should always run on an i386 >>>(even if you use e.g. -Op3), unless you use some special command >>>line switches I cannot find in the help. >> >> -C code generation options: >> -Cc set default calling convention to >> -CDcreate also dynamic library (not supported) >> -CeCompilation with emulated floating point opcodes >> -Cf Select fpu instruction set to use, see fpc -i for >>possible values >> -CgGenerate PIC code >> -Ch bytes heap (between 1023 and 67107840) >> -CiIO-checking >> -Cnomit linking stage >> -Cocheck overflow of integer operations >> -Cp select instruction set, see fpc -i for possible >> values >> >>That is it :) > > > Nice can of worms I haven't been aware of... ;-) So what is the best - > Cp option for my Athlon then? ;-))) And what would be correct for AMD > K6 and all other non-Intel CPUs > 386? Looks as a lot of work for > Michael... PENTIUM afaik nothing new PENTIUM2 mainly cmov and fcmov, cmov creates nice code for length() or max if max is inlined: # [14] i:=length(s); movlU_P$PROGRAM_S,%eax testl %eax,%eax cmovnel -4(%eax),%eax movl%eax,U_P$PROGRAM_I # [15] j:=max(j,k); movlU_P$PROGRAM_K,%ecx movlU_P$PROGRAM_J,%edx cmpl%ecx,%edx cmovgl %edx,%eax .L29: cmovngl %ecx,%eax movl%eax,U_P$PROGRAM_J PENTIUM3 sse1 for usual code possible (e.g. prefetch) PENTIUM4 sse2 for usual code possible K6 -> Pentium Athlon/Duron -> Pentium2 AthlonXP/Sempron -> Pentium3 Athlon64 -> Pentium4 > > Tomas > > ___ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
