add vphaddw, vphaddd, vphaddsw
add vphsubw, vphsubd, vphsubsw, vpmaddwd, vpmaddubsw
add vpmaxsb, vpmaxsw, vpmaxsd
add vpminsb, vpminsw, vpminsd, vpminub, vpminuw, vpminud
add vpsignb, vpsignw, vpsignd
vpsub{b,w,d,q,sb,sw,usb,usw}