adder27bi.v
5.62 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
*************************************************************************/
// $Id: adder27bi.v,v 1.1 2002/03/28 00:26:13 berndt Exp $
/////////////////////////////////////////////////////////////////////////
//
// Project Reality
//
// module: adder27bi
// description: A 27 bit adder instantiated.
//
// designer: Mike M. Cai 10/28/94
//
/////////////////////////////////////////////////////////////////////////
module adder27bi( sum, co, a, b);
input [26:0] a, b;
output [26:0] sum;
output co;
wire [26:0] sum, sum0_co, sum1_co, sum1, sum0;
ad01d1
sum0_0(.s(sum[0]), .co(sum0_co[1]),
.a(a[0]), .b(b[0]), .ci(1'h0)),
sum0_1(.s(sum[1]), .co(sum0_co[2]),
.a(a[1]), .b(b[1]), .ci(sum0_co[1])),
sum0_2(.s(sum[2]), .co(sum0_co[3]),
.a(a[2]), .b(b[2]), .ci(sum0_co[2])),
sum0_3(.s(sum[3]), .co(sum0_co[4]),
.a(a[3]), .b(b[3]), .ci(sum0_co[3])),
sum0_4(.s(sum[4]), .co(sum0_co[5]),
.a(a[4]), .b(b[4]), .ci(sum0_co[4])),
sum0_5(.s(sum[5]), .co(sum0_co[6]),
.a(a[5]), .b(b[5]), .ci(sum0_co[5])),
sum0_6(.s(sum[6]), .co(sum0_co[7]),
.a(a[6]), .b(b[6]), .ci(sum0_co[6]));
ad01d1h
sum0_7(.s(sum[7]), .co(sum0_co[8]),
.a(a[7]), .b(b[7]), .ci(sum0_co[7])),
sum0_8(.s(sum[8]), .co(sum0_co[9]),
.a(a[8]), .b(b[8]), .ci(sum0_co[8])),
sum0_9(.s(sum[9]), .co(sum0_co[10]),
.a(a[9]), .b(b[9]), .ci(sum0_co[9])),
sum0_10(.s(sum[10]), .co(sum0_co[11]),
.a(a[10]), .b(b[10]), .ci(sum0_co[10])),
sum0_11(.s(sum[11]), .co(sum0_co[12]),
.a(a[11]), .b(b[11]), .ci(sum0_co[11])),
sum0_12(.s(sum[12]), .co(sum0_co[13]),
.a(a[12]), .b(b[12]), .ci(sum0_co[12]));
ni01d3
carry_sel0(.z(sel_carry), .i(sum0_co[13]));
ad01d1
sum0_13(.s(sum0[13]), .co(sum0_co[14]),
.a(a[13]), .b(b[13]), .ci(1'h0)),
sum1_13(.s(sum1[13]), .co(sum1_co[14]),
.a(a[13]), .b(b[13]), .ci(1'h1)),
sum0_14(.s(sum0[14]), .co(sum0_co[15]),
.a(a[14]), .b(b[14]), .ci(sum0_co[14])),
sum1_14(.s(sum1[14]), .co(sum1_co[15]),
.a(a[14]), .b(b[14]), .ci(sum1_co[14])),
sum0_15(.s(sum0[15]), .co(sum0_co[16]),
.a(a[15]), .b(b[15]), .ci(sum0_co[15])),
sum1_15(.s(sum1[15]), .co(sum1_co[16]),
.a(a[15]), .b(b[15]), .ci(sum1_co[15])),
sum0_16(.s(sum0[16]), .co(sum0_co[17]),
.a(a[16]), .b(b[16]), .ci(sum0_co[16])),
sum1_16(.s(sum1[16]), .co(sum1_co[17]),
.a(a[16]), .b(b[16]), .ci(sum1_co[16])),
sum0_17(.s(sum0[17]), .co(sum0_co[18]),
.a(a[17]), .b(b[17]), .ci(sum0_co[17])),
sum1_17(.s(sum1[17]), .co(sum1_co[18]),
.a(a[17]), .b(b[17]), .ci(sum1_co[17])),
sum0_18(.s(sum0[18]), .co(sum0_co[19]),
.a(a[18]), .b(b[18]), .ci(sum0_co[18])),
sum1_18(.s(sum1[18]), .co(sum1_co[19]),
.a(a[18]), .b(b[18]), .ci(sum1_co[18])),
sum0_19(.s(sum0[19]), .co(sum0_co[20]),
.a(a[19]), .b(b[19]), .ci(sum0_co[19])),
sum1_19(.s(sum1[19]), .co(sum1_co[20]),
.a(a[19]), .b(b[19]), .ci(sum1_co[19])),
sum0_20(.s(sum0[20]), .co(sum0_co[21]),
.a(a[20]), .b(b[20]), .ci(sum0_co[20])),
sum1_20(.s(sum1[20]), .co(sum1_co[21]),
.a(a[20]), .b(b[20]), .ci(sum1_co[20]));
ad01d1h
sum0_21(.s(sum0[21]), .co(sum0_co[22]),
.a(a[21]), .b(b[21]), .ci(sum0_co[21])),
sum1_21(.s(sum1[21]), .co(sum1_co[22]),
.a(a[21]), .b(b[21]), .ci(sum1_co[21])),
sum0_22(.s(sum0[22]), .co(sum0_co[23]),
.a(a[22]), .b(b[22]), .ci(sum0_co[22])),
sum1_22(.s(sum1[22]), .co(sum1_co[23]),
.a(a[22]), .b(b[22]), .ci(sum1_co[22])),
sum0_23(.s(sum0[23]), .co(sum0_co[24]),
.a(a[23]), .b(b[23]), .ci(sum0_co[23])),
sum1_23(.s(sum1[23]), .co(sum1_co[24]),
.a(a[23]), .b(b[23]), .ci(sum1_co[23])),
sum0_24(.s(sum0[24]), .co(sum0_co[25]),
.a(a[24]), .b(b[24]), .ci(sum0_co[24])),
sum1_24(.s(sum1[24]), .co(sum1_co[25]),
.a(a[24]), .b(b[24]), .ci(sum1_co[24])),
sum0_25(.s(sum0[25]), .co(sum0_co[26]),
.a(a[25]), .b(b[25]), .ci(sum0_co[25])),
sum1_25(.s(sum1[25]), .co(sum1_co[26]),
.a(a[25]), .b(b[25]), .ci(sum1_co[25])),
sum0_26(.s(sum0[26]), // .co(sum0_co[27]),
.a(a[26]), .b(b[26]), .ci(sum0_co[26])),
sum1_26(.s(sum1[26]), // .co(sum1_co[27]),
.a(a[26]), .b(b[26]), .ci(sum1_co[26]));
mx21d1
sum13(.z(sum[13]), .i0(sum0[13]), .i1(sum1[13]), .s(sel_carry)),
sum14(.z(sum[14]), .i0(sum0[14]), .i1(sum1[14]), .s(sel_carry)),
sum15(.z(sum[15]), .i0(sum0[15]), .i1(sum1[15]), .s(sel_carry)),
sum16(.z(sum[16]), .i0(sum0[16]), .i1(sum1[16]), .s(sel_carry)),
sum17(.z(sum[17]), .i0(sum0[17]), .i1(sum1[17]), .s(sel_carry)),
sum18(.z(sum[18]), .i0(sum0[18]), .i1(sum1[18]), .s(sel_carry)),
sum19(.z(sum[19]), .i0(sum0[19]), .i1(sum1[19]), .s(sel_carry)),
sum20(.z(sum[20]), .i0(sum0[20]), .i1(sum1[20]), .s(sel_carry)),
sum21(.z(sum[21]), .i0(sum0[21]), .i1(sum1[21]), .s(sel_carry)),
sum22(.z(sum[22]), .i0(sum0[22]), .i1(sum1[22]), .s(sel_carry)),
sum23(.z(sum[23]), .i0(sum0[23]), .i1(sum1[23]), .s(sel_carry)),
sum24(.z(sum[24]), .i0(sum0[24]), .i1(sum1[24]), .s(sel_carry)),
sum25(.z(sum[25]), .i0(sum0[25]), .i1(sum1[25]), .s(sel_carry)),
sum26(.z(sum[26]), .i0(sum0[26]), .i1(sum1[26]), .s(sel_carry));
endmodule // adder27bi