_set_controlfp

Article
2017-06-05

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at _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) or /clr:pure 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.

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