8位乘法器.doc

8位乘法器一：8位乘法器的源程序:module mult8( p, a, b); parameter size = 8; input size:1 a, b; output 2* size:1 p; reg 2* size:1 p;always ( a or b) Begin:mult integer index; p = 0;for(index=1; index=size; index=index+1) if (bindex=1) p = p + (a(index); endendmodule二：8位乘法器的测试代码：timescale 1ns/1nsinclude mult8.vmodule tb_mult8;reg8:1 ina,inb;wire16:1 p;mult8 tb_mult8(p,ina,inb);initialbegin#10 ina=$random%255;inb=$random%255;#10 ina=$random%255;inb=$random%255;#10 ina=$random%255;inb=$random%255;#10 $finish;endinitial $monitor($time,%d*%d=%d,ina,inb,p);endmodule三：Transcript显示结果：# Reading D:/altera/91/modelsim_ase/tcl/vsim/pref.tcl # Loading project adder# reading D:altera91modelsim_asewin32aloem/./modelsim.ini# Loading project mult# reading D:altera91modelsim_asewin32aloem/./modelsim.ini# Loading project mult# Compile of mult8.v was successful.# Compile of tb_mult8.v failed with 1 errors.# 2 compiles, 1 failed with 1 error. # Compile of tb_mult8.v was successful.# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# * Error: (vsim-3033) E:/mult/tb_mult8.v(11): Instantiation of initial$monitor failed. The design unit was not found.# Region: /tb_mult8# Searched libraries:# E:multwork# Error loading design# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# * Error: (vsim-3033) E:/mult/tb_mult8.v(11): Instantiation of initial$monitor failed. The design unit was not found.# Region: /tb_mult8# Searched libraries:# E:multwork# Error loading design# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# Loading work.mult8# * Error: (vsim-3033) E:/mult/tb_mult8.v(12): Instantiation of initial$monitor failed. The design unit was not found.# Region: /tb_mult8# Searched libraries:# E:multwork# Error loading design# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# Loading work.mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (16 or 16) does not match connection size (8) for port p.# Region: /tb_mult8/tb_mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (8 or 8) does not match connection size (4) for port a.# Region: /tb_mult8/tb_mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (8 or 8) does not match connection size (4) for port b.# Region: /tb_mult8/tb_mult8add wave sim:/tb_mult8/*run -all# 0 x* x= x# 10 0*10= x# * Note: $finish : E:/mult/tb_mult8.v(10)# Time: 20 ns Iteration: 0 Instance: /tb_mult8# 1# Break in Module tb_mult8 at E:/mult/tb_mult8.v line 10quit -sim# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# Loading work.mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (16 or 16) does not match connection size (8) for port p.# Region: /tb_mult8/tb_mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (8 or 8) does not match connection size (4) for port a.# Region: /tb_mult8/tb_mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (8 or 8) does not match connection size (4) for port b.# Region: /tb_mult8/tb_mult8add wave sim:/tb_mult8/*run -all# 0 x* x= x# 10 0*10= x# * Note: $finish : E:/mult/tb_mult8.v(10)# Time: 20 ns Iteration: 0 Instance: /tb_mult8# 1# Break in Module tb_mult8 at E:/mult/tb_mult8.v line 10quit -sim# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# Loading work.mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (16 or 16) does not match connection size (8) for port p.# Region: /tb_mult8/tb_mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (8 or 8) does not match connection size (4) for port a.# Region: /tb_mult8/tb_mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (8 or 8) does not match connection size (4) for port b.# Region: /tb_mult8/tb_mult8add wave sim:/tb_mult8/*run -all# 0 x* x= x# 10 0*10= x# 20 8*12= x# 30 8*13= x# * Note: $finish : E:/mult/tb_mult8.v(12)# Time: 40 ns Iteration: 0 Instance: /tb_mult8# 1# Break in Module tb_mult8 at E:/mult/tb_mult8.v line 12quit -sim# Compile of mult8.v was successful.# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8 # Loading work.tb_mult8# Loading work.mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (16 or 16) does not match connection size (8) for port p.# Region: /tb_mult8/tb_mult8add wave sim:/tb_mult8/*run -all# 0 x* x= x# 10 128* 42= 0# 20 232* 92= 96# 30 72* 77=168# * Note: $finish : E:/mult/tb_mult8.v(12)# Time: 40 ns Iteration: 0 Instance: /tb_mult8# 1# Break in Module tb_mult8 at E:/mult/tb_mult8.v line 12quit -sim# Compile of mult8.v was successful.# Compile of tb_mult8.v was successful.# 2 compiles, 0 failed with no errors. vsim work.tb_mult8# vsim work.tb_mult8# Loading work.tb_mult8# Loading work.mult8# * Warning: (vsim-3015) E:/mult/tb_mult8.v(6): PCDPC - Port size (16 or 16) does not match connection size (8) for port p.# Region: /tb_mult8/tb_mult8add wave sim:/tb_mult8/*run -all# 0 x* x= x# 10 128* 42= 0# 20 232* 9