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tests/bram: Do not generate write address collisions. 

These have no defined semantics, making the tests non-deterministic.
This commit is contained in:
Marcelina Kościelnicka 2021-03-04 17:55:57 +01:00
parent 9cdc6b5f2e
commit d555454969
1 changed files with 23 additions and 5 deletions
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28
tests/bram/generate.py
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@ -93,18 +93,22 @@ def create_bram(dsc_f, sim_f, ref_f, tb_f, k1, k2, or_next):
tb_dout = list()
tb_addrlist = list()
addrmask = (1 << abits) - 1
for i in range(10):
tb_addrlist.append(random.randrange(1048576))
tb_addrlist.append(random.randrange(1048576) & addrmask)
t = random.randrange(1048576)
for i in range(10):
tb_addrlist.append(t ^ (1 << i))
tb_addrlist.append((t ^ (1 << i)) & addrmask)
v_stmts.append("(* nomem2reg *) reg [%d:0] memory [0:%d];" % (dbits-1, 2**abits-1))
portindex = 0
last_always_hdr = (-1, "")
addr2en = {}
for p1 in range(groups):
for p2 in range(ports[p1]):
pf = "%c%d" % (chr(ord("A") + p1), p2 + 1)
@ -143,6 +147,7 @@ def create_bram(dsc_f, sim_f, ref_f, tb_f, k1, k2, or_next):
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)
addr2en["%sADDR" % pf] = "%sEN" % pf
assign_op = "<="
if clocks[p1] == 0:
@ -247,10 +252,23 @@ def create_bram(dsc_f, sim_f, ref_f, tb_f, k1, k2, or_next):
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)
a2e = {}
for p in tb_addr:
print(" %s <= %d;" % (p, random.choice(tb_addrlist)), file=tb_f)
addr = random.choice(tb_addrlist)
if p in addr2en:
if addr not in a2e:
a2e[addr] = []
a2e[addr].append(addr2en[p])
print(" %s <= %d;" % (p, addr), file=tb_f)
enzero = set()
for v in a2e.values():
x = random.choice(v)
for s in v:
if s != x:
enzero.add(s)
for p in tb_din:
val = 0 if p in enzero else random.randrange(1048576)
print(" %s <= %d;" % (p, val), file=tb_f)
print(" #900;", file=tb_f)
print(" end", file=tb_f)