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87 :: how do I do a c like >>

• adrianv (orginal) [2012-10-13T21:23:34+02:00] view original

  I can't find a c like >> (sar). shr seems to be bitwise (which is great). Currently I do:

  
  proc `sar` (a, b: Int): Int {.inline.} =
    {.emit: """ return `a` >> `b`; """}
  
  Run

  but is there a neater way ? (if you look at the generated c - its ugly - but who cares as long the compiler knows what I meant ;-)

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• Araq (orginal) [2012-10-13T22:31:59+02:00] view original

  There is no other way I think. Never needed 'sar' once. Just use 'div', the compiler is smart enough to generate a 'sar' if 'b' is a constant and a power of 2; and even if 'b' is no constant at compile time, the CPU may not mind a div instruction...

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