27第九章硬件描述语言 ∥通过A0,B0,A1,B1,A2,B2和C1计算C3 nodule Carry3(AO, BO, Al, B1, A2, B2, CL, C3 input AO, B0, Al, Bl, A2, B2, CI wire C2temp Carry 2 forc:2(A0, B0, Al, BI, Cl, C2temp) assign C3 =(A2&&B2)-((A2-B2 )&&C2temp) endmodule ∥通过A0,BO,AI,B1,A2,B2,A3,B3和CU计算C4 module Carry 4( AO, B0, Al, Bl, A2, B2, A3, B3, CI, C4) input AO, BO, Al, B1, A2, B2, A3, B3, CI outpul C4: 3 forc 3 (AO, B0, Al, B1, A2, B2, Cl, C3temp); assign C4=(A3 & b3)-"((A3-"B3 )& C3temp) endmodule 【题9.5】请根据下面所给的语言描述,画出对应的逻辑电路图。 module binary To ESeg wire eSeg, pl, p2, p3, P4 reg A, B, C, D: (pl,C,~D), 2(p2,A,B) (p3,~B,~D) B (eSeg, p1, p2, p3, p4 endmodul A 解:见图A9.5