return -two25/zero;              if (hx<0) return (x-x)/zero;
return -two25/(x-x);		 if (hx<0) return (x-x)/(x-x);
	float __ieee754_log10f(float x)#else	float __ieee754_log10f(x)	float x;#endif{	float y,z;	int32_t i,k,hx;	GET_FLOAT_WORD(hx,x);        k=0;        if (hx < 0x00800000) {                  /* x < 2**-126  */            if ((hx&0x7fffffff)==0)                return -two25/zero;             /* log(+-0)=-inf */            if (hx<0) return (x-x)/zero;        /* log(-#) = NaN */            k -= 25; x *= two25; /* subnormal number, scale up x */	    GET_FLOAT_WORD(hx,x);        }	if (hx >= 0x7f800000) return x+x;	k += (hx>>23)-127;	i  = ((u_int32_t)k&0x80000000)>>31;        hx = (hx&0x007fffff)|((0x7f-i)<<23);        y  = (float)(k+i);	SET_FLOAT_WORD(x,hx);	z  = y*log10_2lo + ivln10*__ieee754_logf(x);	return  z+y*log10_2hi;}