ModuleWare Reference Guide - Hornad

Arithmetic Parts181 ALU (alu181)FunctionIf scalar input port mode = 1 and parameter mode_type = ActiveHigh or scalar input port mode= 0 and parameter mode_type = ActiveLow:f= NOT(a)= NOT(a AND b)= NOT(a) OR b= 1= NOT(a OR b)= NOT(b)= NOT(a XOR b)= a OR NOT(b)= NOT(a) AND b= a XOR b= b= a OR b= 0= a AND NOT(b)= a AND b= aif s = 0if s = 1if s = 2if s = 3if s = 4if s = 5if s = 6if s = 7if s = 8if s = 9if s = 10if s = 11if s = 12if s = 13if s = 14if s = 15cout = 0ovfl = 0else (if scalar input port mode = 0 and parameter mode_type = ActiveHigh or scalar input portmode = 1 and parameter mode_type = ActiveLow):f= a - 1 + cin= a AND b - 1 + cin= a AND NOT(b) - 1 + cin= -1 + cin= a + (a OR NOT(b) + cin= (a AND b) + (a OR NOT(b)) + cin= a - b - 1 + cin= a + NOT(b) + cin= a + (a OR b) + cin= a + b + cin= (a AND NOT(b)) + (a OR b) + cin= a + b + cin= a + a + cin= (a AND b) + a + cin= (a AND NOT(b)) + a + cin= a + cinif s = 0if s = 1if s = 2if s = 3if s = 4if s = 5if s = 6if s = 7if s = 8if s = 9if s = 10if s = 11if s = 12if s = 13if s = 14if s = 15(a MSB is the MSB of the arithmetic operation; this is the n+1th bit from the arithmeticoperation, where n is the width of ports a, b and f)cout= MSBModuleWare Reference Manual, Library Version 1.9 99September 18, 2008