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Only by emulation.
If you use C, you can check compile properties - there is usually fixed point emulation on.
However it significantly slows down processing.
If using floating point is critical for your task, you have to choose another chip.
Your time critical dsp calculations should be in fixed point (interupt, sampling), so you need convert your floating point parameters in fixed point before.
You can make floating code calculations in your non-time critica code sections.l