[myhdl-list] the path not taken

[Neal B. <ndb...@gm...>]

I'm having a problem with this code:

def rnd (x, bits, output):
    min_val = x.min
    max_val = x.max
    @always_comb
    def rnd_logic():
        if (bits < 1):
            output.next = x
        else:
            y1 = intbv (int (x >> (bits-1)), min_val, max_val)
            #y1 = intbv (int(x), min_val, max_val)
            y2 = intbv (int (y1 + 1), min_val, max_val)
            y3 = intbv (int (y2 >> 1), min_val, max_val)
            output.next = y3
    return rnd_logic

When translating to verilog:
ValueError: negative shift count

If the commented line #y1 is used, no error.

So myhdl is complaining about neg shift count if bits < 1, even though I
tried to eliminate that with the if (bits < 1).

What can I do?