ArmPkg/Library/CompilerIntrinsicsLib/Arm/switch32.S

   1 #/** @file
   2 #  Compiler intrinsic for ARM compiler
   3 #
   4 #  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   5 #  SPDX-License-Identifier: BSD-2-Clause-Patent
   6 #
   7 #**/
   8 #
   9
  10 #include <AsmMacroIoLib.h>
  11
  12 .syntax unified
  13
  14 ASM_FUNC(__switch32)
  15     ldr     ip, [lr, #-1]
  16     cmp     r0, ip
  17     add     r0, lr, r0, lsl #2
  18     ldrcc   r0, [r0, #3]
  19     add     ip, lr, ip, lsl #2
  20     ldrcs   r0, [ip, #3]
  21     add     ip, lr, r0
  22     bx      ip
  23