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Sets the floating-point control word.

void __cdecl _set_controlfp(
    unsigned int newControl,
    unsigned int mask


New control-word bit values.


Mask for new control-word bits to set.

The _set_controlfp is similar to _control87, but it only sets the floating-point control word to newControl. The bits in the values indicate the floating-point control state. The floating-point control state allows the program to change the precision, rounding, and infinity modes in the floating-point math package. You can also mask or unmask floating-point exceptions using _set_controlfp. For more information, see _control87, _controlfp, __control87_2.

This function is deprecated when compiling with /clr (Common Language Runtime Compilation) or /clr:pure because the common language runtime only supports the default floating-point precision.


Required header




x86 processor only

For more compatibility information, see Compatibility in the Introduction.