1 files changed, 82 insertions, 0 deletions
diff --git a/newlib/libc/machine/spu/strchr.c b/newlib/libc/machine/spu/strchr.c
new file mode 100644
index 000000000..2b1eeac80
--- /dev/null
+++ b/newlib/libc/machine/spu/strchr.c
@@ -0,0 +1,82 @@
+/*
+  (C) Copyright 2001,2006,
+  International Business Machines Corporation,
+  Sony Computer Entertainment, Incorporated,
+  Toshiba 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 <stddef.h>
+
+/* Scans the string pointed to by s for the character c and
+ * returns a pointer to the first occurance of c. If
+ * c is not found, then NULL is returned.
+ */
+char *strchr(const char *s, int c)
+{
+  unsigned int cmp, skip;
+  vec_uchar16 *ptr, data, vc;
+  vec_uint4 cmp_c, cmp_0;
+  vec_uint4 result;
+  vec_uint4 mask;
+
+  /* Scan memory array a quadword at a time. Skip leading
+   * mis-aligned bytes.
+   */
+  ptr = (vec_uchar16 *)s;
+
+  skip = (unsigned int)(ptr) & 15;
+  mask = spu_rlmask((vec_uint4)(0xFFFF), -skip);
+
+  vc = spu_splats((unsigned char)(c));
+
+  data = *ptr++;
+
+  cmp_c = spu_and(spu_gather(spu_cmpeq(data, vc)), mask);
+  cmp_0 = spu_and(spu_gather(spu_cmpeq(data, 0)), mask);
+
+  cmp = spu_extract(spu_or(cmp_c, cmp_0), 0);
+
+  while (cmp == 0) {
+    data = *ptr++;
+    cmp_c = spu_gather(spu_cmpeq(data, vc));
+    cmp_0 = spu_gather(spu_cmpeq(data, 0));
+
+    cmp = spu_extract(spu_or(cmp_c, cmp_0), 0);
+  }
+
+  /* Compute the location of the first character. If it is beyond
+   * the end of the string, then return NULL.
+   */
+  result = spu_add(spu_promote((unsigned int)ptr - (skip+32), 0),
+		   spu_cntlz(spu_promote(cmp, 0)));
+
+  result = spu_andc(result, spu_cmpgt(cmp_0, cmp_c));
+
+  return ((char *)spu_extract(result, 0));
+}