PLE10P4                                             PLE DESIGN SPECIFICATION
P5020                                                  VINCENT COLI 08/22/83
FIVE 2-BIT INTEGER ROW PARTIAL PRODUCTS ADDER
MMI SANTA CLARA, CALIFORNIA
.ADD A0 A1 B0 B1 C0 C1 D0 D1 E0 E1
.DAT P0 P1 P2 P3


P3,P2,P1,P0 = A1,A0 .+. B1,B0 .+. C1,C0 .+. D1,D0 .+. E1,E0  ; P = A+B+C+D+E


FUNCTION TABLE

A1 A0 B1 B0 C1 C0 D1 D0 E1 E0 P3 P2 P1 P0

;AA   BB   CC   DD   EE    PPPP     COMMENTS
;10   10   10   10   10    3210     A + B + C + D + E = P
-----------------------------------------------------------
 LL   LL   LL   LL   LL    LLLL     0 + 0 + 0 + 0 + 0 =  0
 LH   LH   LH   LH   LH    LHLH     1 + 1 + 1 + 1 + 1 =  5
 HL   HL   HL   HL   HL    HLHL     2 + 2 + 2 + 2 + 2 = 10
 HH   HH   HH   HH   HH    HHHH     3 + 3 + 3 + 3 + 3 = 15
-----------------------------------------------------------


DESCRIPTION

THIS PLE10P4 PERFORMS PARTIAL PRODUCTS REDUCTION FOR WALLACE TREE
COMPRESSION.  FIVE ROWS OF 2-BIT NUMBERS (A1-A0, B1-B0, C1-C0,
D1-D0, AND E1-E0) ARE NUMERICALLY SUMMED TO PRODUCE A 4-BIT RESULT
(P3-P0).


                  A1 A0
                  B1 B0
                  C1 C0
                  D1 D0
              +   E1 E0
            ------------
            P3 P2 P1 P0
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