instoffset int64
	pc         int64
}

// Instruction layout.

const (
	FuncAlign = 4
	loopAlign = 16
)

type Optab struct {
	as    obj.As
	from1 uint8
	reg   uint8
	from3 uint8
	to1   uint8
	to2   uint8
	type_ int8
	size  int8
	param int16
	flag  uint8
}

const (
	NOTUSETMP = 1 << iota // p expands to multiple instructions, but does NOT use REGTMP