ModuleWare Reference Guide - Hornad

Arithmetic Parts181 ALU (alu181)ParametersTable 6-2. 181 ALU ParametersParameter Values Defaulta, b, f Port widths (must be > 0) Automaticsign_typecin_typemode_typecout_typeovfl_typeUnsigned, SignedActiveHigh, ActiveLowActiveHigh, ActiveLowActiveHigh, ActiveLowActiveHigh, ActiveLowUnsignedActiveHighActiveHighActiveHighActiveHighDesign Rule Checks• An error is issued if the width of any port cannot be determined, if ports cin, cout, ovfl andmode do not have a fixed width of 1 or if port s does not have a fixed width of 4.• A warning is issued and HDL generation fails for this part if any of ports a, b, mode, s and fare not connected.ModuleWare Reference Manual, Library Version 1.9 101September 18, 2008