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glibc  2.9
Functions | Variables
e_remainderf.c File Reference
#include "math.h"
#include "math_private.h"

Go to the source code of this file.

Functions

float __ieee754_remainderf (float x, float p)

Variables

static float zero = 0.0

Function Documentation

float __ieee754_remainderf ( float  x,
float  p 
)

Definition at line 33 of file e_remainderf.c.

{
       int32_t hx,hp;
       u_int32_t sx;
       float p_half;

       GET_FLOAT_WORD(hx,x);
       GET_FLOAT_WORD(hp,p);
       sx = hx&0x80000000;
       hp &= 0x7fffffff;
       hx &= 0x7fffffff;

    /* purge off exception values */
       if(hp==0) return (x*p)/(x*p);             /* p = 0 */
       if((hx>=0x7f800000)||                     /* x not finite */
         ((hp>0x7f800000)))               /* p is NaN */
           return (x*p)/(x*p);


       if (hp<=0x7effffff) x = __ieee754_fmodf(x,p+p);  /* now x < 2p */
       if ((hx-hp)==0) return zero*x;
       x  = fabsf(x);
       p  = fabsf(p);
       if (hp<0x01000000) {
           if(x+x>p) {
              x-=p;
              if(x+x>=p) x -= p;
           }
       } else {
           p_half = (float)0.5*p;
           if(x>p_half) {
              x-=p;
              if(x>=p_half) x -= p;
           }
       }
       GET_FLOAT_WORD(hx,x);
       SET_FLOAT_WORD(x,hx^sx);
       return x;
}

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Variable Documentation

float zero = 0.0 [static]

Definition at line 26 of file e_remainderf.c.