[GCC 4.8] Initial check-in of GCC 4.8.0

Change-Id: I0719d8a6d0f69b367a6ab6f10eb75622dbf12771

1 files changed, 56 insertions, 0 deletions

diff --git a/gcc-4.8/libgo/runtime/go-type-identity.c b/gcc-4.8/libgo/runtime/go-type-identity.c
new file mode 100644
index 000000000..ed510f75a
--- /dev/null
+++ b/gcc-4.8/libgo/runtime/go-type-identity.c
@@ -0,0 +1,56 @@
+/* go-type-identity.c -- hash and equality identity functions.
+
+   Copyright 2009 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+#include <stddef.h>
+
+#include "runtime.h"
+#include "go-type.h"
+
+/* An identity hash function for a type.  This is used for types where
+   we can simply use the type value itself as a hash code.  This is
+   true of, e.g., integers and pointers.  */
+
+uintptr_t
+__go_type_hash_identity (const void *key, uintptr_t key_size)
+{
+  uintptr_t ret;
+  uintptr_t i;
+  const unsigned char *p;
+
+  if (key_size <= 8)
+    {
+      union
+      {
+	uint64 v;
+	unsigned char a[8];
+      } u;
+      u.v = 0;
+#ifdef WORDS_BIGENDIAN
+      __builtin_memcpy (&u.a[8 - key_size], key, key_size);
+#else
+      __builtin_memcpy (&u.a[0], key, key_size);
+#endif
+      if (sizeof (uintptr_t) >= 8)
+	return (uintptr_t) u.v;
+      else
+	return (uintptr_t) ((u.v >> 32) ^ (u.v & 0xffffffff));
+    }
+
+  ret = 5381;
+  for (i = 0, p = (const unsigned char *) key; i < key_size; i++, p++)
+    ret = ret * 33 + *p;
+  return ret;
+}
+
+/* An identity equality function for a type.  This is used for types
+   where we can check for equality by checking that the values have
+   the same bits.  */
+
+_Bool
+__go_type_equal_identity (const void *k1, const void *k2, uintptr_t key_size)
+{
+  return __builtin_memcmp (k1, k2, key_size) == 0;
+}