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#include <limits.h>
#include "libm.h"
int ilogbf(float x)
{
union fshape u = {x};
int e = u.bits>>23 & 0xff;
if (!e) {
u.bits <<= 9;
if (u.bits == 0)
return FP_ILOGB0;
/* subnormal x */
for (e = -0x7f; u.bits < (uint32_t)1<<31; e--, u.bits<<=1);
return e;
}
if (e == 0xff)
return u.bits<<9 ? FP_ILOGBNAN : INT_MAX;
return e - 0x7f;
}
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