1 /* go-type-identity.c -- hash and equality identity functions.
3 Copyright 2009 The Go Authors. All rights reserved.
4 Use of this source code is governed by a BSD-style
5 license that can be found in the LICENSE file. */
11 /* The 64-bit type. */
13 typedef unsigned int DItype __attribute__ ((mode (DI)));
15 /* An identity hash function for a type. This is used for types where
16 we can simply use the type value itself as a hash code. This is
17 true of, e.g., integers and pointers. */
20 __go_type_hash_identity (const void *key, uintptr_t key_size)
24 const unsigned char *p;
34 __builtin_memcpy (&u.a, key, key_size);
35 return (uintptr_t) u.v;
39 for (i = 0, p = (const unsigned char *) key; i < key_size; i++, p++)
44 /* An identity equality function for a type. This is used for types
45 where we can check for equality by checking that the values have
49 __go_type_equal_identity (const void *k1, const void *k2, uintptr_t key_size)
51 return __builtin_memcmp (k1, k2, key_size) == 0;