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Object Pascal

function Get8087CW: Word;


extern DELPHI_PACKAGE Word __fastcall Get8087CW(void);


Type Visibility Source Unit Parent
function public
System System


Returns the value of the 8087 control word.

Use Get8087CW to determine the current value of the FPU (floating-point unit) control word.

On 32-bit Windows: This control word controls the precision of floating-point calculations, the rounding mode, and whether certain floating-point operations trigger exceptions. See the Intel processors' documentation for details.

On 64-bit Windows: This control word does not control floating-point operations, because the SSE register is used for floating point in 64-bit mode, instead of the FPU. However the FPU is still present in 64-bit mode, so Get8087CW returns the control word value, as in 32-bit mode.

See Also