68K/68332 Assembly/Binary Problem

Hey all,

I'm in need of some help with a project I'm currently working on.

It's a calculator that runs on an MC68332 processor and performs
operations and conversions with numbers in Hex, Decimal and Binary.

The problem I'm having is with the limitations of the CPUs arithmetic
commands; the program needs to work with 64-bit signed integers
however the CPU commands are limited to mainly 32-bit values.

Is there a way to convert decimal to binary/hex and back without
needing large division and multiplication commands? I've considered
manually coding division and multiplication subroutines but after
designing a multiplication algorithm which takes way too many clock
cycles; is there another way to proceed?

Thanks.

.

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