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Obtaining the bit pattern of a floating point number


It seems to me that x86_64 supports direct moves from XMM to
general-purpose registers, so that it's possible to access the
representation of a floating point value without going through memory:

long getbits(double src)
{
  long result;
  __asm__ ("movq %1, %0" : "=q" (result) : "x" (src));
  return result;
}

Is this functionally available as some sort of built-in?


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