4.3.3. Bare machine C with floating-point

If you want to use floating-point processing in your application you must:

If you are using software floating-point, you can also define the function __rt_fp_status_addr() to return the address of a writable data word to be used instead of the floating-point status register. If you do not do this, the user_libspace area is created which occupies over 90 bytes.

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