target/linux/coldfire/files-2.6.31/arch/m68k/coldfire/common/muldi3.S

   1 /*
   2  * Coldfire muldi3 assembly verion
   3  * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
   4  *   Jason Jin Jason.Jin@freescale.com
   5  *   Shrek Wu B16972@freescale.com
   6  */
   7
   8 #include <linux/linkage.h>
   9 .globl __muldi3
  10
  11 ENTRY(__muldi3)
  12         linkw   %fp,#0
  13         lea     %sp@(-32),%sp
  14         moveml  %d2-%d7/%a2-%a3,%sp@
  15         moveal  %fp@(8), %a2
  16         moveal  %fp@(12), %a3
  17         moveal  %fp@(16), %a0
  18         moveal  %fp@(20),%a1
  19         movel   %a3,%d2
  20         andil   #65535,%d2
  21         movel   %a3,%d3
  22         clrw    %d3
  23         swap    %d3
  24         movel   %a1,%d0
  25         andil   #65535,%d0
  26         movel   %a1,%d1
  27         clrw    %d1
  28         swap    %d1
  29         movel   %d2,%d7
  30         mulsl   %d0,%d7
  31         movel   %d2,%d4
  32         mulsl   %d1,%d4
  33         movel   %d3,%d2
  34         mulsl   %d0,%d2
  35         mulsl   %d1,%d3
  36         movel   %d7,%d0
  37         clrw    %d0
  38         swap    %d0
  39         addl    %d0,%d4
  40         addl    %d2,%d4
  41         cmpl    %d4,%d2
  42         blss    1f
  43         addil   #65536,%d3
  44 1:
  45         movel   %d4,%d0
  46         clrw    %d0
  47         swap    %d0
  48         movel   %d3,%d5
  49         addl    %d0,%d5
  50         movew   %d4,%d6
  51         swap    %d6
  52         movew   %d7,%d6
  53         movel   %d5,%d0
  54         movel   %d6,%d1
  55         movel   %a3,%d2
  56         movel   %a0,%d3
  57         mulsl   %d3,%d2
  58         movel   %a2,%d3
  59         movel   %a1,%d4
  60         mulsl   %d4,%d3
  61         addl    %d3,%d2
  62         movel   %d2,%d0
  63         addl    %d5,%d0
  64         moveml  %sp@, %d2-%d7/%a2-%a3
  65         lea     %sp@(32),%sp
  66         unlk    %fp
  67         rts