Merge commit 'refs/top-bases/t/bigmem' into t/bigmem

1 files changed, 45 insertions, 0 deletions

diff --git a/sysdeps/tile/tilegx/rawmemchr.c b/sysdeps/tile/tilegx/rawmemchr.c
new file mode 100644
index 0000000000..94e8acb5bd
--- /dev/null
+++ b/sysdeps/tile/tilegx/rawmemchr.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 2011-2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
+
+   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 <string.h>
+#include <stdint.h>
+#include "string-endian.h"
+
+void *
+__rawmemchr (const void *s, int c)
+{
+  /* Get an aligned pointer. */
+  const uintptr_t s_int = (uintptr_t) s;
+  const uint64_t *p = (const uint64_t *) (s_int & -8);
+
+  /* Create eight copies of the byte for which we are looking. */
+  const uint64_t goal = copy_byte(c);
+
+  /* Read the first word, but munge it so that bytes before the array
+     will not match goal.  */
+  const uint64_t before_mask = MASK (s_int);
+  uint64_t v = (*p | before_mask) ^ (goal & before_mask);
+
+  uint64_t bits;
+  while ((bits = __insn_v1cmpeq (v, goal)) == 0)
+    v = *++p;
+
+  return ((char *) p) + (CFZ (bits) >> 3);
+}
+libc_hidden_def (__rawmemchr)
+weak_alias (__rawmemchr, rawmemchr)