lib/libm/__fpclassifyf.c


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#include <math.h>
#include <stdint.h>

int __fpclassifyf(float x)
{
	union {
		float f;
		uint32_t i;
	} u = { x };
	int e = u.i >> 23 & 0xff;
	if (!e)
		return u.i << 1 ? FP_SUBNORMAL : FP_ZERO;
	if (e == 0xff)
		return u.i << 9 ? FP_NAN : FP_INFINITE;
	return FP_NORMAL;
}