SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
In the extended GCD algorithm shown in Section 7.3.4.4.1.6.5, GF2m SXL Operation, it can happen that the ADD operation (3) changes the degree of the 'v' operand, namely when deg(u) == deg(v). The DEGREE operation helps to quickly determine the new degree of the 'v' operand again. The DEGREE operation is not issued through the GF2M_CMD register, but occurs as a side effect of reading a word from one of the GF2M_OPERAND (GF2M_OPERAND_A_0 through GF2M_OPERAND_D_17) or GF2M_POLYNOMIAL (GF2M_POLYNOMIAL_0 through GF2M_POLYNOMIAL_17) registers. The suggested use is as follows: