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icebox: Fix LUT output code. 

sig values where "1'b0" and "1'b1" not "0" or "1".
This commit is contained in:
Tim 'mithro' Ansell 2018-06-11 13:45:06 -07:00
parent 92751d505a
commit f9c1f2e5b2
1 changed files with 5 additions and 5 deletions
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10
icebox/icebox_vlog.py
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@ -851,11 +851,11 @@ for lut in luts_queue:
l_expr = make_lut_expr(bits[0:len(bits)//2], sigs[1:])
h_expr = make_lut_expr(bits[len(bits)//2:len(bits)], sigs[1:])
if h_expr == l_expr: return h_expr
if sigs[0] == "0": return l_expr
if sigs[0] == "1": return h_expr
if h_expr == "1" and l_expr == "0": return sigs[0]
if h_expr == "0" and l_expr == "1": return "!" + sigs[0]
return "%s ? %s : %s" % (sigs[0], h_expr, l_expr)
if sigs[0] == "1'b0": return l_expr
if sigs[0] == "1'b1": return h_expr
if h_expr == "1'b1" and l_expr == "1'b0": return sigs[0]
if h_expr == "1'b0" and l_expr == "1'b1": return "!" + sigs[0]
return "(%s ? %s : %s)" % (sigs[0], h_expr, l_expr)
lut_expr = make_lut_expr(lut_bits, [net_in3, net_in2, net_in1, net_in0])
lut_assigns.append([net_lout, "/* LUT %2d %2d %2d */ %s" % (lut[0], lut[1], lut[2], lut_expr)])
max_net_len = max(max_net_len, len(net_lout))