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#!/usr/bin/env python3
import os
import sys
import random
debug_mode = False
seed = (int(os.times()[4]*100) + os.getpid()) % 900000 + 100000
def create_bram(dsc_f, sim_f, ref_f, tb_f, k1, k2, or_next):
while True:
init = 0 # random.randrange(2)
abits = random.randrange(1, 8)
dbits = random.randrange(1, 8)
groups = random.randrange(2, 5)
if random.randrange(2):
abits = 2 ** random.randrange(1, 4)
if random.randrange(2):
dbits = 2 ** random.randrange(1, 4)
while True:
wrmode = [ random.randrange(0, 2) for i in range(groups) ]
if wrmode.count(1) == 0: continue
if wrmode.count(0) == 0: continue
break
if random.randrange(2) or True:
maxpol = 4
maxtransp = 1
else:
maxpol = 2
maxtransp = 2
def generate_enable(i):
if wrmode[i]:
v = 2 ** random.randrange(0, 4)
while dbits < v or dbits % v != 0:
v //= 2
return v
return 0
def generate_transp(i):
if wrmode[i] == 0:
return random.randrange(maxtransp)
return 0
ports = [ random.randrange(1, 3) for i in range(groups) ]
enable = [ generate_enable(i) for i in range(groups) ]
transp = [ generate_transp(i) for i in range(groups) ]
clocks = [ random.randrange(1, 4) for i in range(groups) ]
clkpol = [ random.randrange(maxpol) for i in range(groups) ]
break
print("bram bram_%02d_%02d" % (k1, k2), file=dsc_f)
print(" init %d" % init, file=dsc_f)
print(" abits %d" % abits, file=dsc_f)
print(" dbits %d" % dbits, file=dsc_f)
print(" groups %d" % groups, file=dsc_f)
print(" ports %s" % " ".join(["%d" % i for i in ports]), file=dsc_f)
print(" wrmode %s" % " ".join(["%d" % i for i in wrmode]), file=dsc_f)
print(" enable %s" % " ".join(["%d" % i for i in enable]), file=dsc_f)
print(" transp %s" % " ".join(["%d" % i for i in transp]), file=dsc_f)
print(" clocks %s" % " ".join(["%d" % i for i in clocks]), file=dsc_f)
print(" clkpol %s" % " ".join(["%d" % i for i in clkpol]), file=dsc_f)
print("endbram", file=dsc_f)
print("match bram_%02d_%02d" % (k1, k2), file=dsc_f)
if random.randrange(2):
non_zero_enables = [chr(ord('A') + i) for i in range(len(enable)) if enable[i]]
if len(non_zero_enables):
print(" shuffle_enable %c" % random.choice(non_zero_enables), file=dsc_f)
if or_next:
print(" or_next_if_better", file=dsc_f)
print("endmatch", file=dsc_f)
states = set()
v_ports = set()
v_stmts = list()
v_always = dict()
tb_decls = list()
tb_clocks = list()
tb_addr = list()
tb_din = list()
tb_dout = list()
tb_addrlist = list()
for i in range(10):
tb_addrlist.append(random.randrange(1048576))
t = random.randrange(1048576)
for i in range(10):
tb_addrlist.append(t ^ (1 << i))
v_stmts.append("(* nomem2reg *) reg [%d:0] memory [0:%d];" % (dbits-1, 2**abits-1))
portindex = 0
last_always_hdr = (-1, "")
for p1 in range(groups):
for p2 in range(ports[p1]):
pf = "%c%d" % (chr(ord("A") + p1), p2 + 1)
portindex += 1
v_stmts.append("`ifndef SYNTHESIS")
v_stmts.append(" event UPDATE_%s;" % pf)
v_stmts.append("`endif")
if clocks[p1] and not ("CLK%d" % clocks[p1]) in v_ports:
v_ports.add("CLK%d" % clocks[p1])
v_stmts.append("input CLK%d;" % clocks[p1])
tb_decls.append("reg CLK%d;" % clocks[p1])
tb_clocks.append("CLK%d" % clocks[p1])
v_ports.add("%sADDR" % pf)
v_stmts.append("input [%d:0] %sADDR;" % (abits-1, pf))
tb_decls.append("reg [%d:0] %sADDR;" % (abits-1, pf))
tb_addr.append("%sADDR" % pf)
v_ports.add("%sDATA" % pf)
v_stmts.append("%s [%d:0] %sDATA;" % ("input" if wrmode[p1] else "output reg", dbits-1, pf))
if wrmode[p1]:
tb_decls.append("reg [%d:0] %sDATA;" % (dbits-1, pf))
tb_din.append("%sDATA" % pf)
else:
tb_decls.append("wire [%d:0] %sDATA;" % (dbits-1, pf))
tb_decls.append("wire [%d:0] %sDATA_R;" % (dbits-1, pf))
tb_dout.append("%sDATA" % pf)
if wrmode[p1] and enable[p1]:
v_ports.add("%sEN" % pf)
v_stmts.append("input [%d:0] %sEN;" % (enable[p1]-1, pf))
tb_decls.append("reg [%d:0] %sEN;" % (enable[p1]-1, pf))
tb_din.append("%sEN" % pf)
assign_op = "<="
if clocks[p1] == 0:
always_hdr = "always @* begin"
assign_op = "="
elif clkpol[p1] == 0:
always_hdr = "always @(negedge CLK%d) begin" % clocks[p1]
elif clkpol[p1] == 1:
always_hdr = "always @(posedge CLK%d) begin" % clocks[p1]
else:
if not ("CP", clkpol[p1]) in states:
v_stmts.append("parameter CLKPOL%d = 0;" % clkpol[p1])
states.add(("CP", clkpol[p1]))
if not ("CPW", clocks[p1], clkpol[p1]) in states:
v_stmts.append("wire CLK%d_CLKPOL%d = CLK%d == CLKPOL%d;" % (clocks[p1], clkpol[p1], clocks[p1], clkpol[p1]))
states.add(("CPW", clocks[p1], clkpol[p1]))
always_hdr = "always @(posedge CLK%d_CLKPOL%d) begin" % (clocks[p1], clkpol[p1])
if last_always_hdr[1] != always_hdr:
last_always_hdr = (portindex, always_hdr)
v_always[last_always_hdr] = list()
if wrmode[p1]:
for i in range(enable[p1]):
enrange = "[%d:%d]" % ((i+1)*dbits/enable[p1]-1, i*dbits/enable[p1])
v_always[last_always_hdr].append((portindex, pf, "if (%sEN[%d]) memory[%sADDR]%s = %sDATA%s;" % (pf, i, pf, enrange, pf, enrange)))
else:
v_always[last_always_hdr].append((sum(ports)+1 if transp[p1] else 0, pf, "%sDATA %s memory[%sADDR];" % (pf, assign_op, pf)))
for always_hdr in sorted(v_always):
v_stmts.append(always_hdr[1])
triggered_events = set()
time_cursor = 0
v_always[always_hdr].sort()
for t, p, s in v_always[always_hdr]:
if time_cursor != t or not p in triggered_events:
v_stmts.append(" `ifndef SYNTHESIS")
stmt = ""
if time_cursor != t:
stmt += " #%d;" % (t-time_cursor)
time_cursor = t
if not p in triggered_events:
stmt += (" -> UPDATE_%s;" % p)
triggered_events.add(p)
v_stmts.append(" %s" % stmt)
v_stmts.append(" `endif")
v_stmts.append(" %s" % s)
v_stmts.append("end")
print("module bram_%02d_%02d(%s);" % (k1, k2, ", ".join(v_ports)), file=sim_f)
for stmt in v_stmts:
print(" %s" % stmt, file=sim_f)
print("endmodule", file=sim_f)
print("module bram_%02d_%02d_ref(%s);" % (k1, k2, ", ".join(v_ports)), file=ref_f)
for stmt in v_stmts:
print(" %s" % stmt, file=ref_f)
print("endmodule", file=ref_f)
print("module bram_%02d_%02d_tb;" % (k1, k2), file=tb_f)
for stmt in tb_decls:
print(" %s" % stmt, file=tb_f)
print(" bram_%02d_%02d uut (" % (k1, k2), file=tb_f)
print(" " + ",\n ".join([".%s(%s)" % (p, p) for p in (tb_clocks + tb_addr + tb_din + tb_dout)]), file=tb_f)
print(" );", file=tb_f)
print(" bram_%02d_%02d_ref ref (" % (k1, k2), file=tb_f)
print(" " + ",\n ".join([".%s(%s)" % (p, p) for p in (tb_clocks + tb_addr + tb_din)]) + ",", file=tb_f)
print(" " + ",\n ".join([".%s(%s_R)" % (p, p) for p in tb_dout]), file=tb_f)
print(" );", file=tb_f)
expr_dout = "{%s}" % ", ".join(tb_dout)
expr_dout_ref = "{%s}" % ", ".join(i + "_R" for i in tb_dout)
print(" wire error = %s !== %s;" % (expr_dout, expr_dout_ref), file=tb_f)
print(" initial begin", file=tb_f)
if debug_mode:
print(" $dumpfile(`vcd_file);", file=tb_f)
print(" $dumpvars(0, bram_%02d_%02d_tb);" % (k1, k2), file=tb_f)
print(" #%d;" % (1000 + k2), file=tb_f)
for p in (tb_clocks + tb_addr + tb_din):
if p[-2:] == "EN":
print(" %s <= ~0;" % p, file=tb_f)
else:
print(" %s <= 0;" % p, file=tb_f)
print(" #1000;", file=tb_f)
for v in [1, 0, 1, 0]:
for p in tb_clocks:
print(" %s = %d;" % (p, v), file=tb_f)
print(" #1000;", file=tb_f)
for i in range(20 if debug_mode else 100):
if len(tb_clocks):
c = random.choice(tb_clocks)
print(" %s = !%s;" % (c, c), file=tb_f)
print(" #100;", file=tb_f)
print(" $display(\"bram_%02d_%02d %3d: %%b %%b %%s\", %s, %s, error ? \"ERROR\" : \"OK\");" %
(k1, k2, i, expr_dout, expr_dout_ref), file=tb_f)
for p in tb_din:
print(" %s <= %d;" % (p, random.randrange(1048576)), file=tb_f)
for p in tb_addr:
print(" %s <= %d;" % (p, random.choice(tb_addrlist)), file=tb_f)
print(" #900;", file=tb_f)
print(" end", file=tb_f)
print("endmodule", file=tb_f)
print("Rng seed: %d" % seed)
random.seed(seed)
for k1 in range(5):
dsc_f = open("temp/brams_%02d.txt" % k1, "w")
sim_f = open("temp/brams_%02d.v" % k1, "w")
ref_f = open("temp/brams_%02d_ref.v" % k1, "w")
tb_f = open("temp/brams_%02d_tb.v" % k1, "w")
for f in [sim_f, ref_f, tb_f]:
print("`timescale 1 ns / 1 ns", file=f)
lenk2 = 1 if debug_mode else 10
for k2 in range(lenk2):
create_bram(dsc_f, sim_f, ref_f, tb_f, k1, k2, random.randrange(2 if k2+1 < lenk2 else 1))
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