X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Fnearbyint.c;h=7a4c58cf5af64833c1460ca8772810aa19c16cda;hb=38b3f1fea8fe4f2c590c1a9438d219291a7bfcd2;hp=714c55cadb68ed95a357a3bf900b00fe651b78d4;hpb=93a50a26cd0f9efc59cc83daae7b2d916b327ab1;p=musl

diff --git a/src/math/nearbyint.c b/src/math/nearbyint.c
index 714c55ca..7a4c58cf 100644
--- a/src/math/nearbyint.c
+++ b/src/math/nearbyint.c
@@ -1,20 +1,19 @@
 #include <fenv.h>
 #include <math.h>
 
-/*
-rint may raise inexact (and it should not alter the fenv otherwise)
-nearbyint must not raise inexact
+/* nearbyint is the same as rint, but it must not raise the inexact exception */
 
-(according to ieee754r section 7.9 both functions should raise invalid
-when the input is signaling nan, but c99 does not define snan so saving
-and restoring the entire fenv should be fine)
-*/
+double nearbyint(double x)
+{
+#ifdef FE_INEXACT
+	int e;
 
-double nearbyint(double x) {
-	fenv_t e;
-
-	fegetenv(&e);
+	e = fetestexcept(FE_INEXACT);
+#endif
 	x = rint(x);
-	fesetenv(&e);
+#ifdef FE_INEXACT
+	if (!e)
+		feclearexcept(FE_INEXACT);
+#endif
 	return x;
 }