MICROFORUM

I use 16-bit MCU and need to multiply two 128-bit binary numbers. Any idea how to do this?

I have five binary words called W0, W1, W2, W3 and W4. Each word has 8 bit p0 to p7, where p0 is LSB and p7 is MSB. The word W0 is the lowest and W4 is the highest word. All words concatenated together (W0 through W4) represent a 40-bit binary number: p7(W4) is bit 39 and is MSB of 40 bit binary num...