p.s. tested execution speed and there is no measurable difference.
> asm code > # [109] bit:= longint(1) shl k; > movslq %ecx,%rdx > # Register r8d allocated > movl $1,%r8d > # Register edx,edx allocated > shlx %edx,%r8d,%edx > # Register r8d released > # Register edx allocated > movl %edx,%esi > # Peephole Optimization: %esi = %edx; changed to minimise pipeline stall > (MovXXX2MovXXX) > # Peephole Optimization: Mov2Nop 4 done > what purpose serve: movslq %ecx,%rdx ? > movl %edx,%esi seems unnecessary, > when just enough would be > movl $1,%esi > shlx %ecx,%esi,%esi > _______________________________________________ > fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
