Microsemi SmartFusion2 Manual page 9

Table 2-2 • Hard Multiplier Accumulator Dot Product Mode Configuration Description
Name Valid Range
Width 2 to 9
Register Port
Input Port B1
Width 2 to 9
Register Port
Input Port C
Use Constant
35
Constant Value (Hex) -2
Width 2 to 35
Carry In
Register Port
Output Port P
Register Port Always selected
Overflow/CarryOut None, Overflow,
CarryOut
Description
Width of input port B0; if shorter than 9 bits it is sign-extended. For
example, if the width is 8, a value of 0x7F means +127 and a value of
0xFF means -1.
Registers input port B0
Width of input port B1; if shorter than 9 bits it is sign-extended. For
example, if the width is 8, a value of 0x7F means +127 and a value of
0xFF means -1.
Registers input port B1
Sets input port C to constant
35
to (2 - 1) Two's complement value of C, if C is constant. Values shorter than 35
bits are padded with zeros. Negative values must be a full 35 bits wide.
Width of input port C; if shorter than 35 bits it is sign-extended. For
example, if the width is 8, a value of 0x7F means +127 and a value of
0xFF means -1.
Carry in for C (if C is not set to constant)
Registers input port C and Carry In (if C is not set to constant)
Registers output port P, CDOUT, and Overflow/CarryOut
Select the output port function to include in the module interface
9