1 files changed, 78 insertions, 0 deletions
diff --git a/newlib/libc/machine/spu/memcmp_ea.c b/newlib/libc/machine/spu/memcmp_ea.c
new file mode 100644
index 000000000..4088bcc14
--- /dev/null
+++ b/newlib/libc/machine/spu/memcmp_ea.c
@@ -0,0 +1,78 @@
+/*
+(C) Copyright IBM Corp. 2007, 2008
+
+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 name of IBM nor the names of its 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 <string.h>
+#include <stddef.h>
+#include "ea_internal.h"
+#include <ea.h>
+#include <spu_cache.h>
+
+COMPAT_EA_ALIAS (memcmp_ea);
+
+int
+memcmp_ea (__ea void *s1, __ea const void *s2, size_ea_t n)
+{
+  __ea void *curr_s1 = s1;
+  __ea void *curr_s2 = (__ea void *) s2;
+  void *l_s1;
+  void *l_s2;
+  size_ea_t local_n;
+  size_ea_t s2_n;
+  size_ea_t s1_n;
+  int ret;
+
+  ret = 0;
+  while (n)
+    {
+      l_s2 = __cache_fetch (curr_s2);
+      l_s1 = __cache_fetch (curr_s1);
+
+      /*
+       * Use the smaller of the size left to compare (n), the space left in
+       * s2 cacheline (s2_n), or the space left in the s1 cacheline (s1_n).
+       */
+      s2_n = ROUND_UP_NEXT_128 ((size_ea_t) curr_s2) - (size_ea_t) curr_s2;
+      s1_n = ROUND_UP_NEXT_128 ((size_ea_t) curr_s1) - (size_ea_t) curr_s1;
+      local_n = three_way_min (s2_n, s1_n, n);
+
+      ret = memcmp (l_s1, l_s2, local_n);
+      if (ret)
+	return ret;
+
+      /* update values to take into account what we copied */
+      curr_s2 += local_n;
+      curr_s1 += local_n;
+      n -= local_n;
+
+    }
+
+  return ret;
+}