cpu_sgemm_and_matmul_cpp_short

C++ API example demonstrating MatMul as a replacement for SGEMM functions.

Concepts:

• Create primitive once, use multiple times
  • Run-time tensor shapes: DNNL_RUNTIME_DIM_VAL
  • Run-time output scales: dnnl::primitive_attr::set_output_scales() and DNNL_RUNTIME_F32_VAL