go/src/cmd/internal/obj/s390x/vector.go

// vop returns the opcode, element size and condition
// setting for the given (possibly extended) mnemonic.
func vop(as obj.As) (opcode, es, cs uint32) { … }

// singleElementMask returns the single element mask bits required for the
// given instruction.
func singleElementMask(as obj.As) uint32 { … }