From 7f3394bdf34e28b374e5569a7a74ddac734fb172 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Fri, 29 May 2009 12:00:22 -0700
Subject: [PATCH] Fix errno for boundary conditions in 128-bit long double.

Similar to the changes which went already in for the other formats,
follow POSIX rules for errno.
---
 ChangeLog                           | 11 +++++++++++
 sysdeps/ieee754/ldbl-128/s_cosl.c   | 10 +++++++++-
 sysdeps/ieee754/ldbl-128/s_expm1l.c |  6 +++++-
 sysdeps/ieee754/ldbl-128/s_sinl.c   | 10 +++++++++-
 sysdeps/ieee754/ldbl-128/s_tanl.c   | 10 +++++++++-
 5 files changed, 43 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 99ff1e390b..b1fec55266 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2009-05-29  Jakub Jelinek  <jakub@redhat.com>
+
+	* sysdeps/ieee754/ldbl-128/s_expm1l.c: Include <errno.h>.
+	(__expm1l): Set errno to ERANGE on overflow.
+	* sysdeps/ieee754/ldbl-128/s_tanl.c: Include <errno.h>.
+	(__tanl): Set errno to EDOM for ±Inf.
+	* sysdeps/ieee754/ldbl-128/s_cosl.c: Include <errno.h>.
+	(__cosl): Set errno to EDOM for ±Inf.
+	* sysdeps/ieee754/ldbl-128/s_sinl.c: Include <errno.h>.
+	(__sinl): Set errno to EDOM for ±Inf.
+
 2009-05-29  Jakub Jelinek  <jakub@redhat.com>
 
 	* sysdeps/s390/s390-32/__longjmp.c (__longjmp): If CHECK_SP is
diff --git a/sysdeps/ieee754/ldbl-128/s_cosl.c b/sysdeps/ieee754/ldbl-128/s_cosl.c
index d1258b2cf1..ef61c3afdb 100644
--- a/sysdeps/ieee754/ldbl-128/s_cosl.c
+++ b/sysdeps/ieee754/ldbl-128/s_cosl.c
@@ -44,6 +44,7 @@
  *	TRIG(x) returns trig(x) nearly rounded
  */
 
+#include <errno.h>
 #include "math.h"
 #include "math_private.h"
 
@@ -66,7 +67,14 @@
 	  return __kernel_cosl(x,z);
 
     /* cos(Inf or NaN) is NaN */
-	else if (ix>=0x7fff000000000000LL) return x-x;
+	else if (ix>=0x7fff000000000000LL) {
+	    if (ix == 0x7fff000000000000LL) {
+		GET_LDOUBLE_LSW64(n,x);
+		if (n == 0)
+		    __set_errno (EDOM);
+	    }
+	    return x-x;
+	}
 
     /* argument reduction needed */
 	else {
diff --git a/sysdeps/ieee754/ldbl-128/s_expm1l.c b/sysdeps/ieee754/ldbl-128/s_expm1l.c
index 78bbe65b53..a82489bb24 100644
--- a/sysdeps/ieee754/ldbl-128/s_expm1l.c
+++ b/sysdeps/ieee754/ldbl-128/s_expm1l.c
@@ -53,6 +53,7 @@
 
 
 
+#include <errno.h>
 #include "math.h"
 #include "math_private.h"
 
@@ -121,7 +122,10 @@ __expm1l (long double x)
 
   /* Overflow.  */
   if (x > maxlog)
-    return (big * big);
+    {
+      __set_errno (ERANGE);
+      return (big * big);
+    }
 
   /* Minimum value.  */
   if (x < minarg)
diff --git a/sysdeps/ieee754/ldbl-128/s_sinl.c b/sysdeps/ieee754/ldbl-128/s_sinl.c
index 446a75f126..dc509e72e5 100644
--- a/sysdeps/ieee754/ldbl-128/s_sinl.c
+++ b/sysdeps/ieee754/ldbl-128/s_sinl.c
@@ -44,6 +44,7 @@
  *	TRIG(x) returns trig(x) nearly rounded
  */
 
+#include <errno.h>
 #include "math.h"
 #include "math_private.h"
 
@@ -66,7 +67,14 @@
 	  return __kernel_sinl(x,z,0);
 
     /* sin(Inf or NaN) is NaN */
-	else if (ix>=0x7fff000000000000LL) return x-x;
+	else if (ix>=0x7fff000000000000LL) {
+	    if (ix == 0x7fff000000000000LL) {
+		GET_LDOUBLE_LSW64(n,x);
+		if (n == 0)
+		    __set_errno (EDOM);
+	    }
+	    return x-x;
+	}
 
     /* argument reduction needed */
 	else {
diff --git a/sysdeps/ieee754/ldbl-128/s_tanl.c b/sysdeps/ieee754/ldbl-128/s_tanl.c
index ea9d053d9b..2349da67f1 100644
--- a/sysdeps/ieee754/ldbl-128/s_tanl.c
+++ b/sysdeps/ieee754/ldbl-128/s_tanl.c
@@ -44,6 +44,7 @@
  *	TRIG(x) returns trig(x) nearly rounded
  */
 
+#include <errno.h>
 #include "math.h"
 #include "math_private.h"
 
@@ -65,7 +66,14 @@
 	if(ix <= 0x3ffe921fb54442d1LL) return __kernel_tanl(x,z,1);
 
     /* tanl(Inf or NaN) is NaN */
-	else if (ix>=0x7fff000000000000LL) return x-x;		/* NaN */
+	else if (ix>=0x7fff000000000000LL) {
+	    if (ix == 0x7fff000000000000LL) {
+		GET_LDOUBLE_LSW64(n,x);
+		if (n == 0)
+		    __set_errno (EDOM);
+	    }
+	    return x-x;		/* NaN */
+	}
 
     /* argument reduction needed */
 	else {