ModuleWare Reference Guide - Hornad

Memory PartsRegister File (regfile)Functionregfile is a table of internal locations. The number of locations is given by the parameterregfile_size:regfile(waddr) = din if wena = 1 & waddr < regfile_sizedout0= regfile(raddr0) if rena0 = 1 & waddr0 < regfile_size= ZZ…otherwisedout1= regfile(raddr1)= ZZ...raddr0_error = 0= 1raddr1_error = 0= 1waddr_error = 0= 1Parametersif rena1 = 1 & waddr1 < regfile_sizeotherwiseif raddr0 < regfile_sizeotherwiseif raddr1 < regfile_sizeotherwiseif waddr < regfile_sizeotherwiseTable 9-6. Register File ParametersParameter Values Defaultdin, dout0, dout1raddr0raddr1waddrraddr0_error_typeraddr1_error_typewaddr_error_typeregfile_sizePort widths (must be > 0)Port width (must be > 0)Port width (must be > 0)Port width (must be > 0)Enabled,DisabledEnabled,DisabledEnabled,DisabledNumber of memory locations in the register fileAutomaticAutomaticAutomaticAutomaticEnabledEnabledEnabled8Design Rule Checks• An error is issued if the width of any port cannot be determined or if ports wena, rena,rena1, raddr0_error, raddr1_error and waddr_error do not have a fixed width of 1.• A warning is issued and HDL generation fails for this part if any of ports rena0, rena1,raddr0, raddr1, waddr, rena, dout0 or dout1 are not connected.ModuleWare Reference Manual, Library Version 1.9 215September 18, 2008