set-controlfp.md

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_set_controlfp | Microsoft Docs		11/04/2016			cpp-standard-libraries		article	_set_controlfp	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll api-ms-win-crt-runtime-l1-1-0.dll	DLLExport	set_controlfp _set_controlfp	C++	set_controlfp function floating-point functions, setting control word _set_controlfp function	e0689d50-f68a-4028-a9c1-fb23eedee4ad	11	corob-msft	corob	ghogen

_set_controlfp

Sets the floating-point control word.

Syntax

void __cdecl _set_controlfp(  
    unsigned int newControl,  
    unsigned int mask  
);  

Parameters

newControl
New control-word bit values.

mask
Mask for new control-word bits to set.

Return Value

None.

Remarks

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) because the common language runtime only supports the default floating-point precision.

Requirements

Routine	Required header	Compatibility
_set_controlfp	<float.h>	x86 processor only

For more compatibility information, see Compatibility in the Introduction.

See Also

Floating-Point Support
_clear87, _clearfp
_status87, _statusfp, _statusfp2