1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/x86_64/tst-avx.c b/sysdeps/x86_64/tst-avx.c
new file mode 100644
index 0000000000..9c52fc264a
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx.c
@@ -0,0 +1,49 @@
+/* Test case for preserved AVX registers in dynamic linker.
+   Copyright (C) 2017-2018 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>
+
+int tst_avx_aux (void);
+
+static int
+avx_enabled (void)
+{
+  unsigned int eax, ebx, ecx, edx;
+
+  if (__get_cpuid (1, &eax, &ebx, &ecx, &edx) == 0
+      || (ecx & (bit_AVX | bit_OSXSAVE)) != (bit_AVX | bit_OSXSAVE))
+    return 0;
+
+  /* Check the OS has AVX and SSE saving enabled.  */
+  asm ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (0));
+
+  return (eax & 6) == 6;
+}
+
+static int
+do_test (void)
+{
+  /* Run AVX test only if AVX is supported.  */
+  if (avx_enabled ())
+    return tst_avx_aux ();
+  else
+    return 77;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../../test-skeleton.c"