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      1 #/** @file
      2 #  Compiler intrinsic for ARM compiler
      3 #
      4 #  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
      5 #  This program and the accompanying materials
      6 #  are licensed and made available under the terms and conditions of the BSD License
      7 #  which accompanies this distribution.  The full text of the license may be found at
      8 #  http://opensource.org/licenses/bsd-license.php
      9 #
     10 #  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     11 #  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.;
     12 #
     13 #**/
     14 #
     15 
     16 #include <AsmMacroIoLib.h>
     17 
     18 .syntax unified
     19 
     20 ASM_FUNC(__switch16)
     21     ldrh      ip, [lr, #-1]
     22     cmp       r0, ip
     23     add       r0, lr, r0, lsl #1
     24     ldrshcc   r0, [r0, #1]
     25     add       ip, lr, ip, lsl #1
     26     ldrshcs   r0, [ip, #1]
     27     add       ip, lr, r0, lsl #1
     28     bx        ip
     29 
     30 
     31