package sm2ec // p256Element is a P-256 base field element in [0, P-1] in the Montgomery // domain (with R 2²⁵⁶) as four limbs in little-endian order value. type p256Element [4]uint64 //go:noescape func p256BigToLittle(res *p256Element, in *[32]byte) //go:noescape func p256LittleToBig(res *[32]byte, in *p256Element) // If cond is not 0, sets val = -val mod p. // //go:noescape func p256NegCond(val *p256Element, cond int)