1DPGEN_ADSB2F(3)         Alliance - genlib User's Manual        DPGEN_ADSB2F(3)
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NAME

6       DPGEN_ADSB2F - Adder/Substractor Macro-Generator
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SYNOPSIS

9       #include  <genlib.h>
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11       void GENLIB_MACRO (DPGEN_ADSB2F, char *modelname, long flags, long N);
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DESCRIPTION

14       Generate a N bits adder/substractor named modelname.
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16       How it works :
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18       · if  the add_sub signal is set to '0' an addition is performed, other‐
19         wise it's a substraction.
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21       · Operation can be either signed or unsigned. In unsigned mode  c31  is
22         the overflow, in unsigned mode you have to compute overflow by XORing
23         c31 and c30.
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25   TERMINAL NAMES
26       1. add_sub : select addition or substraction (input, 1 bit).
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28       2. c31 : carry out. In unsigned mode, this is the overflow  (output,  1
29          bits).
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31       3. c30  : used to compute overflow in signed mode : overflow := c31 xor
32          c30 (output, 1 bits).
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34       4. i1 : first operand (input, N bits).
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36       5. i0 : second operand (input, N bits).
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38       6. q : output (N bits).
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40       7. vdd : power.
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42       8. vss : ground.
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EXAMPLE

45       GENLIB_MACRO(DPGEN_ADSB2F, "model_adsb2f_32"
46                                   , F_BEHAV|F_PLACE
47                                   , 32
48                                   );
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50       GENLIB_LOINS( "model_adsb2f_32"
51                   , "instance1_adsb2f_32"
52                   , "add_sub"
53                   , "c32"
54                   , "c31"
55                   , "i1[31:0]"
56                   , "i0[31:0]"
57                   ,  "q[31:0]"
58                   , "vdd", "vss", NULL
59                   );
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SEE ALSO

63       GENLIB_MACRO(3), genlib(1)
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67ASIM/LIP6                        30 July 2004                  DPGEN_ADSB2F(3)