X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fmath%2Fllrintl.c;h=3449f6f2b400944f64076270433144626d9eb4b5;hb=3bb6bd85808ace7b588d1c523bb7badfd9e72650;hp=ec2cf86b5251969a7fcaeb0c896f521f2fe24735;hpb=93a50a26cd0f9efc59cc83daae7b2d916b327ab1;p=musl

diff --git a/src/math/llrintl.c b/src/math/llrintl.c
index ec2cf86b..3449f6f2 100644
--- a/src/math/llrintl.c
+++ b/src/math/llrintl.c
@@ -1,16 +1,36 @@
-#include <math.h>
-#include <float.h>
+#include <limits.h>
+#include <fenv.h>
+#include "libm.h"
+
 
 #if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
 long long llrintl(long double x)
 {
 	return llrint(x);
 }
-#else
-#define type            long double
-#define roundit         rintl
-#define dtype           long long
-#define fn              llrintl
+#elif defined(FE_INEXACT)
+/*
+see comments in lrint.c
+
+Note that if LLONG_MAX == 0x7fffffffffffffff && LDBL_MANT_DIG == 64
+then x == 2**63 - 0.5 is the only input that overflows and
+raises inexact (with tonearest or upward rounding mode)
+*/
+long long llrintl(long double x)
+{
+	#pragma STDC FENV_ACCESS ON
+	int e;
 
-#include "lrint.c"
+	e = fetestexcept(FE_INEXACT);
+	x = rintl(x);
+	if (!e && (x > LLONG_MAX || x < LLONG_MIN))
+		feclearexcept(FE_INEXACT);
+	/* conversion */
+	return x;
+}
+#else
+long long llrintl(long double x)
+{
+	return rintl(x);
+}
 #endif