From 423a7160af7fcffc61aac5e2e36d0b6b5b083214 Mon Sep 17 00:00:00 2001
From: Wilco <wdijkstr@arm.com>
Date: Thu, 17 Apr 2014 09:39:27 +0100
Subject: [PATCH] Add fenv test support for targets which don't have FP traps.

---
 ChangeLog                    |  7 +++++++
 math/test-fenv.c             | 25 +++++++++++++++----------
 sysdeps/arm/math-tests.h     |  3 +++
 sysdeps/generic/math-tests.h | 11 +++++++++++
 4 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ac4065988a..b8fa520e19 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2014-04-17  Wilco  <wdijkstr@arm.com>
+
+	* sysdeps/arm/math-tests.h: New file: Set ARM math-test settings.
+	* sysdeps/generic/math-tests.h: Add macro (EXCEPTION_ENABLE_SUPPORTED).
+	* math/test-fenv.c: Skip exception trap tests on targets which only
+	support non-stop mode.
+
 2014-04-17  Ian Bolton  <ian.bolton@arm.com>
 	    Wilco Dijkstra  <wilco.dijkstra@arm.com>
 
diff --git a/math/test-fenv.c b/math/test-fenv.c
index 73cd1a7fb8..23e47d4f36 100644
--- a/math/test-fenv.c
+++ b/math/test-fenv.c
@@ -36,6 +36,7 @@
 #include <unistd.h>
 #include <sys/wait.h>
 #include <sys/resource.h>
+#include <math-tests.h>
 
 /*
   Since not all architectures might define all exceptions, we define
@@ -233,14 +234,9 @@ feenv_nomask_test (const char *flag_name, int fe_exc)
 #if defined FE_NOMASK_ENV
   int status;
   pid_t pid;
-  fenv_t saved;
 
-  fegetenv (&saved);
-  errno = 0;
-  fesetenv (FE_NOMASK_ENV);
-  status = errno;
-  fesetenv (&saved);
-  if (status == ENOSYS)
+  if (!EXCEPTION_ENABLE_SUPPORTED (FE_ALL_EXCEPT)
+      && fesetenv (FE_NOMASK_ENV) != 0)
     {
       printf ("Test: not testing FE_NOMASK_ENV, it isn't implemented.\n");
       return;
@@ -349,7 +345,13 @@ feexcp_nomask_test (const char *flag_name, int fe_exc)
   int status;
   pid_t pid;
 
-  printf ("Test: after fedisableexcept (%s) processes will abort\n",
+  if (!EXCEPTION_ENABLE_SUPPORTED (fe_exc) && feenableexcept (fe_exc) == -1)
+    {
+      printf ("Test: not testing feenableexcept, it isn't implemented.\n");
+      return;
+    }
+
+  printf ("Test: after feenableexcept (%s) processes will abort\n",
 	  flag_name);
   printf ("      when feraiseexcept (%s) is called.\n", flag_name);
   pid = fork ();
@@ -470,7 +472,6 @@ feenable_test (const char *flag_name, int fe_exc)
 {
   int excepts;
 
-
   printf ("Tests for feenableexcepts etc. with flag %s\n", flag_name);
 
   /* First disable all exceptions.  */
@@ -488,8 +489,12 @@ feenable_test (const char *flag_name, int fe_exc)
 	      flag_name, excepts);
       ++count_errors;
     }
-
   excepts = feenableexcept (fe_exc);
+  if (!EXCEPTION_ENABLE_SUPPORTED (fe_exc) && excepts == -1)
+    {
+      printf ("Test: not testing feenableexcept, it isn't implemented.\n");
+      return;
+    }
   if (excepts == -1)
     {
       printf ("Test: feenableexcept (%s) failed\n", flag_name);
diff --git a/sysdeps/arm/math-tests.h b/sysdeps/arm/math-tests.h
index e65f135e97..ea5f8dc994 100644
--- a/sysdeps/arm/math-tests.h
+++ b/sysdeps/arm/math-tests.h
@@ -29,4 +29,7 @@
 # define EXCEPTION_TESTS_long_double	0
 #endif
 
+/* Not all VFP implementations support trapping exceptions.  */
+#define EXCEPTION_ENABLE_SUPPORTED(EXCEPT)	((EXCEPT) == 0)
+
 #include_next <math-tests.h>
diff --git a/sysdeps/generic/math-tests.h b/sysdeps/generic/math-tests.h
index c86b06705e..3f2bd69829 100644
--- a/sysdeps/generic/math-tests.h
+++ b/sysdeps/generic/math-tests.h
@@ -76,3 +76,14 @@
   (sizeof (TYPE) == sizeof (float) ? EXCEPTION_TESTS_float	\
    : sizeof (TYPE) == sizeof (double) ? EXCEPTION_TESTS_double	\
    : EXCEPTION_TESTS_long_double)
+
+/* Indicate whether the given exception trap(s) can be enabled
+   in feenableexcept.  If non-zero, the traps are always supported.
+   If zero, traps may or may not be supported depending on the
+   target (this can be determined by checking the return value
+   of feenableexcept).  This enables skipping of tests which use
+   traps.  By default traps are supported unless overridden.  */
+#ifndef EXCEPTION_ENABLE_SUPPORTED
+# define EXCEPTION_ENABLE_SUPPORTED(EXCEPT)			\
+   (EXCEPTION_TESTS_float || EXCEPTION_TESTS_double)
+#endif