b uint64 _, b = bits.Sub64(x[0], p256P[0], b) _, b = bits.Sub64(x[1], p256P[1], b) _, b = bits.Sub64(x[2], p256P[2], b) _, b = bits.Sub64(x[3], p256P[3], b) return int(b) } func p256BigToLittle(l *p256Element, b *[32]byte) { bytesToLimbs((*[4]uint64)(l), b) } func bytesToLimbs(l *[4]uint64, b *[32]byte) { l[0] = byteorder.BEUint64(b[24:]) l[1] = byteorder.BEUint64(b[16:]) l[2] = byteorder.BEUint64(b[8:]) l[3] = byteorder.BEUint64(b[:]) } func p256LittleToBig(b *[32]byte, l *p256Element) { limbsToBytes(b,...