src/math/__fpclassifyf.c

570af302Sopenharmony_ci#include <math.h>
570af302Sopenharmony_ci#include <stdint.h>
570af302Sopenharmony_ci
570af302Sopenharmony_ciint __fpclassifyf(float x)
570af302Sopenharmony_ci{
570af302Sopenharmony_ci	union {float f; uint32_t i;} u = {x};
570af302Sopenharmony_ci	int e = u.i>>23 & 0xff;
570af302Sopenharmony_ci	if (!e) return u.i<<1 ? FP_SUBNORMAL : FP_ZERO;
570af302Sopenharmony_ci	if (e==0xff) return u.i<<9 ? FP_NAN : FP_INFINITE;
570af302Sopenharmony_ci	return FP_NORMAL;
570af302Sopenharmony_ci}