ArmPkg/Library/CompilerIntrinsicsLib/Arm/mullu.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 #
   5 # SPDX-License-Identifier: BSD-2-Clause-Patent
   6 #
   7 #------------------------------------------------------------------------------
   8 .text
   9
  10 GCC_ASM_EXPORT(__ARM_ll_mullu)
  11 GCC_ASM_EXPORT(__aeabi_lmul)
  12 #
  13 #INT64
  14 #EFIAPI
  15 #__aeabi_lmul (
  16 #  IN INT64   Multiplicand
  17 #  IN INT32   Multiplier
  18 #  );
  19 #
  20 ASM_PFX(__ARM_ll_mullu):
  21   mov     r3, #0
  22 # Make upper part of INT64 Multiplier 0 and use __aeabi_lmul
  23
  24 #
  25 #INT64
  26 #EFIAPI
  27 #__aeabi_lmul (
  28 #  IN INT64   Multiplicand
  29 #  IN INT64   Multiplier
  30 #  );
  31 #
  32 ASM_PFX(__aeabi_lmul):
  33   stmdb   sp!, {lr}
  34   mov     lr, r0
  35   umull   r0, ip, r2, lr
  36   mla     r1, r2, r1, ip
  37   mla     r1, r3, lr, r1
  38   ldmia   sp!, {pc}