1 files changed, 138 insertions, 0 deletions
diff --git a/sysdeps/x86/fpu/test-fenv-sse.c b/sysdeps/x86/fpu/test-fenv-sse.c
new file mode 100644
index 0000000000..c81eb16f79
--- /dev/null
+++ b/sysdeps/x86/fpu/test-fenv-sse.c
@@ -0,0 +1,138 @@
+/* Test floating-point environment includes SSE state (bug 16064).
+   Copyright (C) 2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <cpuid.h>
+#include <fenv.h>
+#include <float.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+static bool
+have_sse2 (void)
+{
+  unsigned int eax, ebx, ecx, edx;
+
+  if (!__get_cpuid (1, &eax, &ebx, &ecx, &edx))
+    return false;
+
+  return (edx & bit_SSE2) != 0;
+}
+
+static __attribute__ ((noinline)) int
+sse_tests (void)
+{
+  int ret = 0;
+  fenv_t base_env;
+  if (fegetenv (&base_env) != 0)
+    {
+      puts ("fegetenv (&base_env) failed");
+      return 1;
+    }
+  if (fesetround (FE_UPWARD) != 0)
+    {
+      puts ("fesetround (FE_UPWARD) failed");
+      return 1;
+    }
+  if (fesetenv (&base_env) != 0)
+    {
+      puts ("fesetenv (&base_env) failed");
+      return 1;
+    }
+  volatile float a = 1.0f, b = FLT_MIN, c;
+  c = a + b;
+  if (c != 1.0f)
+    {
+      puts ("fesetenv did not restore rounding mode");
+      ret = 1;
+    }
+  if (fesetround (FE_DOWNWARD) != 0)
+    {
+      puts ("fesetround (FE_DOWNWARD) failed");
+      return 1;
+    }
+  if (feupdateenv (&base_env) != 0)
+    {
+      puts ("feupdateenv (&base_env) failed");
+      return 1;
+    }
+  volatile float d = -FLT_MIN, e;
+  e = a + d;
+  if (e != 1.0f)
+    {
+      puts ("feupdateenv did not restore rounding mode");
+      ret = 1;
+    }
+  if (fesetround (FE_UPWARD) != 0)
+    {
+      puts ("fesetround (FE_UPWARD) failed");
+      return 1;
+    }
+  fenv_t upward_env;
+  if (feholdexcept (&upward_env) != 0)
+    {
+      puts ("feholdexcept (&upward_env) failed");
+      return 1;
+    }
+  if (fesetround (FE_DOWNWARD) != 0)
+    {
+      puts ("fesetround (FE_DOWNWARD) failed");
+      return 1;
+    }
+  if (fesetenv (&upward_env) != 0)
+    {
+      puts ("fesetenv (&upward_env) failed");
+      return 1;
+    }
+  e = a + d;
+  if (e != 1.0f)
+    {
+      puts ("fesetenv did not restore rounding mode from feholdexcept");
+      ret = 1;
+    }
+  if (fesetround (FE_UPWARD) != 0)
+    {
+      puts ("fesetround (FE_UPWARD) failed");
+      return 1;
+    }
+  if (fesetenv (FE_DFL_ENV) != 0)
+    {
+      puts ("fesetenv (FE_DFL_ENV) failed");
+      return 1;
+    }
+  c = a + b;
+  if (c != 1.0f)
+    {
+      puts ("fesetenv (FE_DFL_ENV) did not restore rounding mode");
+      ret = 1;
+    }
+  return ret;
+}
+
+static int
+do_test (void)
+{
+  if (!have_sse2 ())
+    {
+      puts ("CPU does not support SSE2, cannot test");
+      return 0;
+    }
+  return sse_tests ();
+}
+
+#define TEST_FUNCTION do_test ()
+#include <test-skeleton.c>