internal static v128 ShortToLong(short2 x)
{
if (Sse4_1.IsSse41Supported)
{
return(Sse4_1.cvtepi16_epi64(x));
}
else if (Sse2.IsSse2Supported)
{
v128 sign = Sse2.cmpgt_epi16(default(v128), x);
v128 shorts = Sse2.unpacklo_epi16(x, sign);
sign = Sse2.unpacklo_epi16(sign, sign);
return(Sse2.unpacklo_epi32(shorts, sign));
}
else
{
throw new CPUFeatureCheckException();
}
}