#include "libm.h"
+#if FLT_EVAL_METHOD==0
+#define EPS FLT_EPSILON
+#elif FLT_EVAL_METHOD==1
+#define EPS DBL_EPSILON
+#elif FLT_EVAL_METHOD==2
+#define EPS LDBL_EPSILON
+#endif
+static const float_t toint = 1/EPS;
+
float roundf(float x)
{
union {float f; uint32_t i;} u = {x};
if (u.i >> 31)
x = -x;
if (e < 0x7f-1) {
- FORCE_EVAL(x + 0x1p23f);
+ FORCE_EVAL(x + toint);
return 0*u.f;
}
- y = (float)(x + 0x1p23f) - 0x1p23f - x;
+ y = x + toint - toint - x;
if (y > 0.5f)
y = y + x - 1;
else if (y <= -0.5f)