X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Fceil.c;h=b13e6f2d63689818ff349f1327fb5d1bb25eb49d;hb=0ce946cf808274c2d6e5419b139e130c8ad4bd30;hp=22dc224c5f38b1fdebbdba03d36bf0f408298baa;hpb=79ca86094d70f43252b683c3a3ccb572d462cf28;p=musl

diff --git a/src/math/ceil.c b/src/math/ceil.c
index 22dc224c..b13e6f2d 100644
--- a/src/math/ceil.c
+++ b/src/math/ceil.c
@@ -1,5 +1,12 @@
 #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};
@@ -10,9 +17,9 @@ double ceil(double 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);