1 files changed, 75 insertions, 0 deletions
diff --git a/newlib/libc/machine/spu/straddr.h b/newlib/libc/machine/spu/straddr.h
new file mode 100644
index 000000000..3de594df6
--- /dev/null
+++ b/newlib/libc/machine/spu/straddr.h
@@ -0,0 +1,75 @@
+/*
+  (C) Copyright 2008
+  International Business Machines Corporation,
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+    * Neither the names of the copyright holders nor the names of their
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+  OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <spu_intrinsics.h>
+#include "vec_literal.h"
+
+/*
+ * Supply the inline _straddr for use by strncpy and strncat.
+*
+* _straddr: search the string s, and return the address of the first byte
+* containing zero.
+*/
+static inline char *_straddr(const char *s)
+{
+  unsigned int cnt, cmp, skip, mask;
+  vec_uchar16 *ptr, data;
+
+  /*
+   * Compensate for unaligned strings.
+   */
+  ptr = (vec_uchar16 *)s; /* implicit (s & ~0xf) */
+  skip = (unsigned int)(ptr) & 0xf;
+  /*
+   * skip the first skip bytes starting at (s & ~0xf).
+   */
+  mask = 0xFFFF >> skip;
+
+  data = *ptr;
+  cmp = spu_extract(spu_gather(spu_cmpeq(data, 0)), 0);
+  cmp &= mask;
+
+  cnt = spu_extract(spu_cntlz(spu_promote(cmp, 0)), 0);
+
+  while (cnt == 32) {
+    data = *++ptr;
+    cnt = spu_extract(spu_cntlz(spu_gather(spu_cmpeq(data, 0))), 0);
+    /*
+     * The first 16 bits for gather on a byte vector are zero, so if cnt
+     * is 32, none of the 16 bytes in data was zero. And, there are (cnt -
+     * 16) non-zero bytes in data.
+     */
+  }
+  /*
+   * The first non-zero byte is at ptr aligned down plus the number of
+   * non-zero bytes seen.
+   */
+  return ((char*) (((int) ptr & ~0xf) + (cnt - 16)));
+}