Defined in rt_fp.h, this function returns the address of the floating-point status word, which resides by default in __user_libspace. It is not part of the C library standard, but the ARM C library supports it as an extension.


unsigned *__rt_fp_status_addr(void);


If __rt_fp_status_addr() is not defined, the default implementation from the C library is used. The value is initialized when __rt_lib_init() calls _fp_init(). The constants for the status word are listed in fenv.h. The default floating-point status is 0.


The address of the floating-point status word.

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ARM C and C++ Libraries and Floating-Point Support User Guide:

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