#include "libm.h"
+#if FLT_EVAL_METHOD==0 || FLT_EVAL_METHOD==1
+#define EPS DBL_EPSILON
+#elif FLT_EVAL_METHOD==2
+#define EPS LDBL_EPSILON
+#endif
+static const double_t toint = 1/EPS;
+
double ceil(double x)
{
union {double f; uint64_t i;} u = {x};
return x;
/* y = int(x) - x, where int(x) is an integer neighbor of x */
if (u.i >> 63)
- y = (double)(x - 0x1p52) + 0x1p52 - x;
+ y = x - toint + toint - x;
else
- y = (double)(x + 0x1p52) - 0x1p52 - x;
+ y = x + toint - toint - x;
/* special case because of non-nearest rounding modes */
if (e <= 0x3ff-1) {
FORCE_EVAL(y);