MSP430FR6007: MSP430FR6007 LEA integers matrix operation

Have you looked into the MSP DSP Library? It has APIs for matrix and vector additions, multiplications, etc, and will use the LEA if available on the device.

The problem there is that the data is assumed to be in one of the available fixed point formats. Which results in bit shifts to fix up the binary point after multiply and divide operations. Not compatible with simple integers.