Lg3 = 0x91e9ee.0p-25, /* 0.28498786688 */
Lg4 = 0xf89e26.0p-26; /* 0.24279078841 */
-static const float zero = 0.0;
-
float logf(float x)
{
float hfsq,f,s,z,R,w,t1,t2,dk;
k = 0;
if (ix < 0x00800000) { /* x < 2**-126 */
if ((ix & 0x7fffffff) == 0)
- return -two25/zero; /* log(+-0)=-inf */
+ return -two25/0.0f; /* log(+-0)=-inf */
if (ix < 0)
- return (x-x)/zero; /* log(-#) = NaN */
+ return (x-x)/0.0f; /* log(-#) = NaN */
/* subnormal number, scale up x */
k -= 25;
x *= two25;
k += i>>23;
f = x - 1.0f;
if ((0x007fffff & (0x8000 + ix)) < 0xc000) { /* -2**-9 <= f < 2**-9 */
- if (f == zero) {
+ if (f == 0.0f) {
if (k == 0)
- return zero;
+ return 0.0f;
dk = (float)k;
return dk*ln2_hi + dk*ln2_lo;
}