đŁÔŇ ëĎÓÁŇĹ×ÓËÉĘ wrote: >> On 24 mei 2006, at 10:56, đŁÔŇ ëĎÓÁŇĹ×ÓËÉĘ wrote: >> > Is there high level operator/(inline)function for rotating bits? >> No. >> > Am I supposed to implement rotating bits (like ror/rol in i386 asm) >> > by inline assembler or some ugly workarounds (shifts and or-s)? >> Yes. I think there's already a feature request to provide these >> operations, but no one worked on it yet. > > Why don't use this code? . . > function brol(b: byte; c: byte): byte; assembler; inline; > asm > movb b,%al > movb c,%cl > rolb %cl,%al > movb %al,result > end ['al','cl']; . .
With register calling convention (which is the default calling convention in FPC 2.x), it can be reduced just to: function brol(b: byte; c: byte): byte; assembler; inline; asm rolb %cl,%al end; (and similarly for all the other functions). The first parameter goes to eax, the second to ecx, and the result is supposed to be in eax again. Tomas _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
