| 摘要 |
FIELD: information technologies. ^ SUBSTANCE: there performed is bitwise summation of two operands and previous carry by using one of the operands which is summed bitwise as to module of the number system base with a mask; from the obtained result there bitwise subtracted is the mask as to module of the number system base; the result of bitwise subtraction is the output result; value of transfer in each bit is formed of the input value of this operand bit summed up as to module of the number system base with a mask, of the second operand, mask and the previous carry with the combined transfer function not using bitwise subtraction as to module of the number system base of the mask from the first operand during transfer formation process; at that, for the lower order bit, as the previous carry value there used is zero value; transfer value from the output of transfer of high-order bit is the output transfer value of summation unit. ^ EFFECT: increasing data protection. ^ 2 dwg, 1 tbl |
