//go:noescape
func p256LittleToBig(res *[32]byte, in *p256Element)

//go:noescape
func p256OrdBigToLittle(res *p256OrdElement, in *[32]byte)

//go:noescape
func p256OrdLittleToBig(res *[32]byte, in *p256OrdElement)

// p256Table is a table of the first 16 multiples of a point. Points are stored
// at an index offset of -1 so [8]P is at index 7, P is at 0, and [16]P is at 15.