ArmPkg/Library/CompilerIntrinsicsLib/Arm/muldi3.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2008-2009 Apple Inc. All rights reserved.
   4 #
   5 # All rights reserved. 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         .text
  16         .align 2
  17         .globl ASM_PFX(__muldi3)
  18
  19 ASM_PFX(__muldi3):
  20         stmfd   sp!, {r4, r5, r6, r7, lr}
  21         add     r7, sp, #12
  22         stmfd   sp!, {r8, r10, r11}
  23         ldr     r11, L4
  24         mov     r4, r0, lsr #16
  25         and     r8, r0, r11
  26         and     ip, r2, r11
  27         mul     lr, ip, r8
  28         mul     ip, r4, ip
  29         sub     sp, sp, #8
  30         add     r10, ip, lr, lsr #16
  31         and     ip, r10, r11
  32         and     lr, lr, r11
  33         mov     r6, r2, lsr #16
  34         str     r4, [sp, #4]
  35         add     r4, lr, ip, asl #16
  36         mul     ip, r8, r6
  37         mov     r5, r10, lsr #16
  38         add     r10, ip, r4, lsr #16
  39         and     ip, r10, r11
  40         and     lr, r4, r11
  41         add     r4, lr, ip, asl #16
  42         mul     r0, r3, r0
  43         add     ip, r5, r10, lsr #16
  44         ldr     r5, [sp, #4]
  45         mla     r0, r2, r1, r0
  46         mla     r5, r6, r5, ip
  47         mov     r10, r4
  48         add     r11, r0, r5
  49         mov     r1, r11
  50         mov     r0, r4
  51         sub     sp, r7, #24
  52         ldmfd   sp!, {r8, r10, r11}
  53         ldmfd   sp!, {r4, r5, r6, r7, pc}
  54         .p2align 2
  55 L5:
  56         .align 2
  57 L4:
  58         .long   65535