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#include <math.h>
#include <stdint.h>
float rintf(float x)
{
union {float f; uint32_t i;} u = {x};
int e = u.i>>23 & 0xff;
int s = u.i>>31;
float_t y;
if (e >= 0x7f+23)
return x;
if (s)
y = (float)(x - 0x1p23f) + 0x1p23f;
else
y = (float)(x + 0x1p23f) - 0x1p23f;
if (y == 0)
return s ? -0.0f : 0.0f;
return y;
}
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