word d_valB = [
d_srcB == e_dstE : e_valE; # Forward valE from execute
d_srcB == M_dstM : m_valM; # Forward valM from memory
d_srcB == M_dstE : M_valE; # Forward valE from memory
d_srcB == W_dstM : W_valM; # Forward valM from write back
d_srcB == W_dstE : W_valE; # Forward valE from write back
1 : d_rvalB;
]