fabsf.c File Reference

#include <math.h>

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Functions
_Check_return_ float __cdecl	fabsf (_In_ float x)

Function Documentation

fabsf()

_Check_return_ float __cdecl fabsf

(

_In_ float

x

)

Definition at line 13 of file fabsf.c.

{
    /* Load the value as uint */
    unsigned int u32 = *(unsigned int*)&x;
 
    /* Clear the sign bit */
    u32 &= ~(1 << 31);
 
    /* Check for NAN */
    if (u32 > 0x7F800000)
    {
        /* Set error bit */
        *(unsigned int*)&x |= 0x00400000;
        return x;
    }
 
    /* Convert back to float */
    return *(float*)&u32;
}