Verilator

Verilator is generating calls to a undefined function named VL_SHIFTL_QQW.

I've found that defining this function in include/verilated.h fixes this issue. To resolve, simply add the following definition to include/verilated.h after VL_SHIFTL_IIW:

static inline QData VL_SHIFTL_QQW(int obits,int,int rbits,IData lhs, WDataInP rwp) VL_MT_SAFE {      
    for (int i=1; i < VL_WORDS_I(rbits); ++i) {                                                      
        if (VL_UNLIKELY(rwp[i])) {  // Huge shift 1>>32 or more                                      
            return 0;                                                                                
        }                                                                                            
    }                                                                                                
    return VL_CLEAN_QQ(obits,obits,lhs<<rwp[0]);                                                     
}   

I've created a Git fork with the necessary changes that can be pulled into your Git repo.

- Larry Lee