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?
