Write the equations for the carry-lookahead logic for a 64-bit adder using the new notation from Exercise
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Figure B.6.3
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Carryln a0 Бо Carryln Resulto-3 at ALUO pi PO GO C1 ci+ 1 Carry-lookahead unit Carryin Result4-7 ALU1 pi+1 gi+ 1 P1 G1 b7 C2 ci+ 2 ав b8 a9 Carryln Result8-11 b9 a10 b10 a11 b11 ALU2 pi + 2 gi+2 P2 G2 СЗ ci+3 a12 Б12 a13 b13 a14 Б14 a15 b15 Carryln Result12–15 ALU3 pi+3 P3 gi+3 G3 C4 ci+ 4 CarryOut
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The equations for c4 c8 and c12 are the same as those given in the solution to Exercise 44...View the full answer
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Related Book For
Computer Organization and Design The Hardware Software Interface
ISBN: 978-0124077263
5th edition
Authors: David A. Patterson, John L. Hennessy
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