public static double2 madsub(double2 a, double2 b, double2 c)
{
if (Fma.IsFmaSupported)
{
v128 temp = Fma.fmsubadd_pd(*(v128 *)&a, *(v128 *)&b, *(v128 *)&c);
return(*(double2 *)&temp);
}
else if (Sse2.IsSse2Supported)
{
v128 negate = Sse2.xor_pd(*(v128 *)&c, new v128(0L, 1L << 63));
return(math.mad(a, b, *(double2 *)&negate));
}
else
{
return(new double2(a.x * b.x + c.x, a.y * b.y - c.y));
}
}