x86-64: Add vector erf/erff implementation to libmvec

Implement vectorized erf/erff containing SSE, AVX, AVX2 and
AVX512 versions for libmvec as per vector ABI.  It also contains
accuracy and ABI tests for vector erf/erff with regenerated ulps.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/sysdeps/x86_64/fpu/multiarch/svml_s_erff8_core.c b/sysdeps/x86_64/fpu/multiarch/svml_s_erff8_core.c
new file mode 100644
index 0000000000..50f5901db1
--- /dev/null
+++ b/sysdeps/x86_64/fpu/multiarch/svml_s_erff8_core.c
@@ -0,0 +1,28 @@
+/* Multiple versions of vectorized erff, vector length is 8.
+   Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#define SYMBOL_NAME _ZGVdN8v_erff
+#include "ifunc-mathvec-avx2.h"
+
+libc_ifunc_redirected (REDIRECT_NAME, SYMBOL_NAME, IFUNC_SELECTOR ());
+
+#ifdef SHARED
+__hidden_ver1 (_ZGVdN8v_erff, __GI__ZGVdN8v_erff,
+	       __redirect__ZGVdN8v_erff)
+  __attribute__ ((visibility ("hidden")));
+#endif