Multiply instead of doing a left shift of a potentially negative number
Multiply instead of doing a left shift of a potentially negative number

fixes GCC ubsan report in the BLAS tests
xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS,xianyi/OpenBLAS