Chisel BugList

[ ] BitPat length bugs
BitPat.pare("b1100_0000") = (192,255,9) 实际8bit，返回9bit
BitPat.pare("b11000000") = (192,255,8)

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35:     (bits, mask, x.length - 1) 
fix 剔除字符'_' 后统计长度
35:     (bits, mask, x.filter(_!='_').length - 1)

# Chisel, firrtl