path: root/pyecsca/ec/efd/shortw/jacobian-3/doubling/dbl-1998-cmo

source 1998 Cohen--Miyaji--Ono "Efficient elliptic curve exponentiation using mixed coordinates", formula (6)
compute S = 4 X1 Y1^2
compute M = 3 X1^2+a Z1^4
compute T = M^2-2 S
compute X3 = T
compute Y3 = M (S-T)-8 Y1^4
compute Z3 = 2 Y1 Z1