1 files changed, 45 insertions, 0 deletions
diff --git a/ports/sysdeps/tile/tilegx/string-endian.h b/ports/sysdeps/tile/tilegx/string-endian.h
new file mode 100644
index 0000000000..c2e40ecd4f
--- /dev/null
+++ b/ports/sysdeps/tile/tilegx/string-endian.h
@@ -0,0 +1,45 @@
+/* Copyright (C) 2011-2012 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/>.  */
+
+/* Provide a mask based on the pointer alignment that
+   sets up non-zero bytes before the beginning of the string.
+   The MASK expression works because shift counts are taken mod 64.
+   Also, specify how to count "first" and "last" bits
+   when the bits have been read as a word.  */
+
+#ifndef __BIG_ENDIAN__
+#define MASK(x) (__insn_shl(1ULL, (x << 3)) - 1)
+#define NULMASK(x) ((2ULL << x) - 1)
+#define CFZ(x) __insn_ctz(x)
+#define REVCZ(x) __insn_clz(x)
+#else
+#define MASK(x) (__insn_shl(-2LL, ((-x << 3) - 1)))
+#define NULMASK(x) (-2LL << (63 - x))
+#define CFZ(x) __insn_clz(x)
+#define REVCZ(x) __insn_ctz(x)
+#endif
+
+/* Create eight copies of the byte in a uint64_t. */
+static inline uint64_t copy_byte(uint8_t byte)
+{
+  uint64_t word = byte;
+  word = __insn_bfins(word, word, 8, 15);
+  word = __insn_bfins(word, word, 16, 31);
+  word = __insn_bfins(word, word, 32, 63);
+  return word;
+}