x86-64: Verify that _dl_runtime_resolve preserves vector registers

On x86-64, _dl_runtime_resolve must preserve the first 8 vector
registers.  Add 3 _dl_runtime_resolve tests to verify that SSE,
AVX and AVX512 registers are preserved.

	* sysdeps/x86_64/Makefile (tests): Add tst-sse, tst-avx and
	tst-avx512.
	(test-extras): Add tst-avx-aux and tst-avx512-aux.
	(extra-test-objs): Add tst-avx-aux.o and tst-avx512-aux.o.
	(modules-names): Add tst-ssemod, tst-avxmod and tst-avx512mod.
	($(objpfx)tst-sse): New rule.
	($(objpfx)tst-avx): Likewise.
	($(objpfx)tst-avx512): Likewise.
	(CFLAGS-tst-avx-aux.c): New.
	(CFLAGS-tst-avxmod.c): Likewise.
	(CFLAGS-tst-avx512-aux.c): Likewise.
	(CFLAGS-tst-avx512mod.c): Likewise.
	* sysdeps/x86_64/tst-avx-aux.c: New file.
	* sysdeps/x86_64/tst-avx.c: Likewise.
	* sysdeps/x86_64/tst-avx512-aux.c: Likewise.
	* sysdeps/x86_64/tst-avx512.c: Likewise.
	* sysdeps/x86_64/tst-avx512mod.c: Likewise.
	* sysdeps/x86_64/tst-avxmod.c: Likewise.
	* sysdeps/x86_64/tst-sse.c: Likewise.
	* sysdeps/x86_64/tst-ssemod.c: Likewise.

1 files changed, 48 insertions, 0 deletions

diff --git a/sysdeps/x86_64/tst-avx512-aux.c b/sysdeps/x86_64/tst-avx512-aux.c
new file mode 100644
index 0000000000..6cebc523f2
--- /dev/null
+++ b/sysdeps/x86_64/tst-avx512-aux.c
@@ -0,0 +1,48 @@
+/* Test case for preserved AVX512 registers in dynamic linker,
+   -mavx512 part.
+   Copyright (C) 2017 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 <immintrin.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+tst_avx512_aux (void)
+{
+#ifdef __AVX512F__
+  extern __m512i avx512_test (__m512i, __m512i, __m512i, __m512i,
+			      __m512i, __m512i, __m512i, __m512i);
+
+  __m512i zmm0 = _mm512_set1_epi32 (0);
+  __m512i zmm1 = _mm512_set1_epi32 (1);
+  __m512i zmm2 = _mm512_set1_epi32 (2);
+  __m512i zmm3 = _mm512_set1_epi32 (3);
+  __m512i zmm4 = _mm512_set1_epi32 (4);
+  __m512i zmm5 = _mm512_set1_epi32 (5);
+  __m512i zmm6 = _mm512_set1_epi32 (6);
+  __m512i zmm7 = _mm512_set1_epi32 (7);
+  __m512i ret = avx512_test (zmm0, zmm1, zmm2, zmm3,
+			     zmm4, zmm5, zmm6, zmm7);
+  zmm0 =  _mm512_set1_epi32 (0x12349876);
+  if (memcmp (&zmm0, &ret, sizeof (ret)))
+    abort ();
+  return 0;
+#else  /* __AVX512F__ */
+  return 77;
+#endif  /* __AVX512F__ */
+}