i386/string/bcopy.c

   1 /*
   2  * Copyright (c) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <machine/cpu_capabilities.h>
  25 #include <platfunc.h>
  26
  27 PLATFUNC_DESCRIPTOR_PROTOTYPE(bcopy, sse42);
  28 PLATFUNC_DESCRIPTOR_PROTOTYPE(bcopy, sse3x);
  29 PLATFUNC_DESCRIPTOR_PROTOTYPE(bcopy, sse2);
  30 PLATFUNC_DESCRIPTOR_PROTOTYPE(bcopy, scalar);
  31
  32 static const platfunc_descriptor *bcopy_platfunc_descriptors[] = {
  33         PLATFUNC_DESCRIPTOR_REFERENCE(bcopy, sse42),
  34         PLATFUNC_DESCRIPTOR_REFERENCE(bcopy, sse3x),
  35         PLATFUNC_DESCRIPTOR_REFERENCE(bcopy, sse2),
  36         PLATFUNC_DESCRIPTOR_REFERENCE(bcopy, scalar),
  37         0
  38 };
  39
  40 void *bcopy_chooser() __asm__("_bcopy");
  41 void *bcopy_chooser() {
  42         __asm__(".desc _bcopy, 0x100");
  43         return find_platform_function((const platfunc_descriptor **) bcopy_platfunc_descriptors);
  44 }