From 1390e9a0a7d4872e24a9fe53e258b8097932392a Mon Sep 17 00:00:00 2001
From: Clifford Wolf <clifford@clifford.at>
Date: Sat, 18 Mar 2017 15:00:03 +0100
Subject: [PATCH] Add simple EDIF test case generator and checker

---
 backends/edif/runtest.py | 113 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 backends/edif/runtest.py

diff --git a/backends/edif/runtest.py b/backends/edif/runtest.py
new file mode 100644
index 000000000..ced5fda5c
--- /dev/null
+++ b/backends/edif/runtest.py
@@ -0,0 +1,113 @@
+#!/usr/bin/env python3
+
+import os
+import numpy as np
+
+enable_upto = True
+enable_offset = True
+
+def make_module(f, modname, width, subs):
+    print("module %s (A, B, C, X, Y, Z);" % modname, file=f)
+    inbits = list()
+    outbits = list()
+
+    for p in "ABC":
+        offset = np.random.randint(10) if enable_offset else 0
+        if enable_upto and np.random.randint(2):
+            print("  input [%d:%d] %s;" % (offset, offset+width-1, p), file=f)
+        else:
+            print("  input [%d:%d] %s;" % (offset+width-1, offset, p), file=f)
+        for i in range(offset, offset+width):
+            inbits.append("%s[%d]" % (p, i))
+
+    for p in "XYZ":
+        offset = np.random.randint(10) if enable_offset else 0
+        if enable_upto and np.random.randint(2):
+            print("  output [%d:%d] %s;" % (offset, offset+width-1, p), file=f)
+        else:
+            print("  output [%d:%d] %s;" % (offset+width-1, offset, p), file=f)
+        for i in range(offset, offset+width):
+            outbits.append("%s[%d]" % (p, i))
+
+    instidx = 0
+    subcandidates = list(subs.keys())
+
+    while len(outbits) > 0:
+        submod = None
+        if len(subcandidates):
+            submod = np.random.choice(subcandidates)
+            subcandidates.remove(submod)
+
+        if submod is None or 3*subs[submod] >= len(outbits):
+            for bit in outbits:
+                print("  assign %s = %s;" % (bit,  np.random.choice(inbits)), file=f)
+            break
+
+        instidx += 1
+        print("  %s inst%d (" % (submod, instidx), file=f)
+
+        for p in "ABC":
+            print("    .%s({%s})," % (p, ",".join(np.random.choice(inbits, subs[submod]))), file=f)
+
+        for p in "XYZ":
+            bits = list(np.random.choice(outbits, subs[submod], False))
+            for bit in bits:
+                outbits.remove(bit)
+            print("    .%s({%s})%s" % (p, ",".join(bits), "," if p != "Z" else ""), file=f)
+
+        print("  );", file=f);
+
+    print("endmodule", file=f)
+
+with open("test_top.v", "w") as f:
+    make_module(f, "sub1", 2, {})
+    make_module(f, "sub2", 3, {})
+    make_module(f, "sub3", 4, {})
+    make_module(f, "sub4", 8, {"sub1": 2, "sub2": 3, "sub3": 4})
+    make_module(f, "sub5", 8, {"sub1": 2, "sub2": 3, "sub3": 4})
+    make_module(f, "sub6", 8, {"sub1": 2, "sub2": 3, "sub3": 4})
+    make_module(f, "top", 32, {"sub4": 8, "sub5": 8, "sub6": 8})
+
+os.system("set -x; ../../yosys -p 'prep -top top; write_edif -pvector par test_syn.edif' test_top.v")
+
+with open("test_syn.tcl", "w") as f:
+    print("read_edif test_syn.edif", file=f)
+    print("link_design", file=f)
+    print("write_verilog -force test_syn.v", file=f)
+
+os.system("set -x; vivado -nojournal -nolog -mode batch -source test_syn.tcl")
+
+with open("test_tb.v", "w") as f:
+    print("module tb;", file=f)
+    print("  reg [31:0] A, B, C;", file=f)
+    print("  wire [31:0] X, Y, Z;", file=f)
+    print("", file=f)
+    print("  top uut (", file=f)
+    print("    .A(A),", file=f)
+    print("    .B(B),", file=f)
+    print("    .C(C),", file=f)
+    print("    .X(X),", file=f)
+    print("    .Y(Y),", file=f)
+    print("    .Z(Z)", file=f)
+    print("  );", file=f)
+    print("", file=f)
+    print("  initial begin", file=f)
+    for i in range(100):
+        print("    A = 32'h%08x;" % np.random.randint(2**32), file=f)
+        print("    B = 32'h%08x;" % np.random.randint(2**32), file=f)
+        print("    C = 32'h%08x;" % np.random.randint(2**32), file=f)
+        print("    #10;", file=f)
+        print("    $display(\"%x %x %x\", X, Y, Z);", file=f)
+        print("    #10;", file=f)
+    print("    $finish;", file=f)
+    print("  end", file=f)
+    print("endmodule", file=f)
+
+os.system("set -x; iverilog -o test_gold test_tb.v test_top.v")
+os.system("set -x; iverilog -o test_gate test_tb.v test_syn.v ../../techlibs/xilinx/cells_sim.v")
+
+os.system("set -x; ./test_gold > test_gold.out")
+os.system("set -x; ./test_gate > test_gate.out")
+
+os.system("set -x; md5sum test_gold.out test_gate.out")
+
-- 
2.30.2