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Arm Compiler Arm C and C++ Libraries and Floating-Point Support User Guide : __rt_fp_status_addr()


Defined in rt_fp.h, the __rt_fp_status_addr() function returns the address of the floating-point status word.

By default, the floating-point status word resides in __user_libspace.

This function 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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