Revert "Rewrite &= -> = and simplify the initial blocking phase."
Revert "Rewrite &= -> = and simplify the initial blocking phase."

xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS