sdcc/device/lib/stm8/__mululonguchar2ulonglong.s

   1 ;--------------------------------------------------------------------------
   2 ;  __mululonguchar2ulonglong.s
   3 ;
   4 ;  Copyright (c) 2023, Philipp Klaus Krause
   5 ;
   6 ;  This library is free software; you can redistribute it and/or modify it
   7 ;  under the terms of the GNU General Public License as published by the
   8 ;  Free Software Foundation; either version 2, or (at your option) any
   9 ;  later version.
  10 ;
  11 ;  This library is distributed in the hope that it will be useful,
  12 ;  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 ;  GNU General Public License for more details.
  15 ;
  16 ;  You should have received a copy of the GNU General Public License
  17 ;  along with this library; see the file COPYING. If not, write to the
  18 ;  Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
  19 ;   MA 02110-1301, USA.
  20 ;
  21 ;  As a special exception, if you link this library with other files,
  22 ;  some of which are compiled with SDCC, to produce an executable,
  23 ;  this library does not by itself cause the resulting executable to
  24 ;  be covered by the GNU General Public License. This exception does
  25 ;  not however invalidate any other reasons why the executable file
  26 ;   might be covered by the GNU General Public License.
  27 ;--------------------------------------------------------------------------
  28
  29 .globl ___mululonguchar2ulonglong
  30
  31 .area CODE
  32
  33 ___mululonguchar2ulonglong:
  34         ; Create temporary destination.
  35         clrw    x
  36         push    a
  37         pushw   x
  38         pushw   x
  39
  40         ld      a, (14, sp)
  41
  42         ldw     x, (12, sp)
  43         mul     x, a
  44         ldw     (4, sp), x
  45
  46         ldw     x, (11, sp)
  47         mul     x, a
  48         addw    x, (3, sp)
  49         ldw     (3, sp), x
  50
  51         ldw     x, (10, sp)
  52         mul     x, a
  53         addw    x, (2, sp)
  54         ldw     (2, sp), x
  55
  56         ldw     x, (9, sp)
  57         mul     x, a
  58         addw    x, (1, sp)
  59
  60         ldw     y, (8, sp)
  61         ldw     (3, y), x
  62         clrw    x
  63         exgw    x, y
  64         ldw     (1, x), y
  65         clr     (x)
  66         ldw     y, (3, sp)
  67         ldw     (5, x), y
  68         ld a, (5, sp)
  69         ld      (7, x), a
  70
  71         addw    sp, #5
  72
  73         ret
  74