Question

Under visual 2012 how can I call the sqrtsd asm function in a c++ project

I can’t find it via google

something like :

double mySqrt(double val)
{
__asm
{
  ...
  sqrstd...
}
}

EDIT:

in 32bit mode

Answer 1

I think doing this is a somewhat academic excercise, as it’s unlikely to have any actual benefit, and quite likely a penalty. However:

double mySqrt(double val)
{
    double retu;

    __asm
    {
        sqrtsd xmm1, val
        movsd retu, xmm1
    }
    return retu;
}