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Download TASKING VX-toolset for ARM User Guide
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TASKING VX-toolset for ARM User Guide feholdexept Saves the current floating-point environment and installs an environment that ignores all floating-point exceptions. (Not implemented) fesetenv Restores a previously saved (fegetenv or feholdexcept) floating-point environment. (Not implemented) feupdateenv Saves the currently raised floating-point exceptions, restores a previously saved floating-point environment and finally raises the saved exceptions. (Not implemented) feclearexcept Clears the current exception status flags corresponding to the flags specified in the argument. (Not implemented) fegetexceptflag Stores the current setting of the floating-point status flags. (Not implemented) feraiseexcept Raises the exceptions represented in the argument. As a result, other exceptions may be raised as well. (Not implemented) fesetexceptflag Sets the current floating-point status flags. (Not implemented) fetestexcept Returns the bitwise-OR of the exception macros corresponding to the exception flags which are currently set and are specified in the argument. (Not implemented) For each supported exception, a macro is defined. The following exceptions are defined: FE_DIVBYZERO FE_OVERFLOW FE_INEXACT FE_UNDERFLOW FE_INVALID FE_ALL_EXCEPT fegetround Returns the current rounding direction, represented as one of the values of the rounding direction macros. (Not implemented) fesetround Sets the current rounding directions. (Not implemented) Currently no rounding mode macros are implemented. 14.2.9. float.h The header file float.h defines the characteristics of the real floating-point types float, double and long double. float.h used to contain prototypes for the functions copysign(f), isinf(f), isfinite(f), isnan(f) and scalb(f). These functions have accordingly to the ISO C99 standard been moved to the header file math.h. See also Section 14.2.16, math.h and tgmath.h. The following functions are only available for ISO C90: copysignf(float f,float s) Copies the sign of the second argument s to the value of the first argument f and returns the result. 796
