sdcc/device/lib/stm8-large/_modulong.s

   1 ;--------------------------------------------------------------------------
   2 ;  _modulong.s
   3 ;
   4 ;  Copyright (C) 2014, Ben Shi
   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 __modulong
  30
  31         .area CODE
  32 __modulong:
  33         sub     sp, #3
  34 ;       device/lib/_modulong.c: 342: unsigned char count = 0;
  35         clr     (0x03, sp)
  36 ;       device/lib/_modulong.c: 344: while (!MSB_SET(b))
  37         clr     (0x01, sp)
  38 __modulong_00103:
  39         ld      a, (0x0b, sp)
  40         sll     a
  41         clr     a
  42         rlc     a
  43         tnz     a
  44         jrne    __modulong_00117
  45 ;       device/lib/_modulong.c: 346: b <<= 1;
  46         ldw     y, (0x0d, sp)
  47         ldw     x, (0x0b, sp)
  48         sllw    y
  49         rlcw    x
  50         ldw     (0x0d, sp), y
  51         ldw     (0x0b, sp), x
  52 ;       device/lib/_modulong.c: 347: if (b > a)
  53         ldw     x, (0x09, sp)
  54         cpw     x, (0x0d, sp)
  55         ld      a, (0x08, sp)
  56         sbc     a, (0x0c, sp)
  57         ld      a, (0x07, sp)
  58         sbc     a, (0x0b, sp)
  59         jrnc    __modulong_00102
  60 ;       device/lib/_modulong.c: 349: b >>=1;
  61         ldw     y, (0x0d, sp)
  62         ldw     x, (0x0b, sp)
  63         srlw    x
  64         rrcw    y
  65         ldw     (0x0d, sp), y
  66         ldw     (0x0b, sp), x
  67 ;       device/lib/_modulong.c: 350: break;
  68         jra     __modulong_00117
  69 __modulong_00102:
  70 ;       device/lib/_modulong.c: 352: count++;
  71         inc     (0x01, sp)
  72         ld      a, (0x01, sp)
  73         ld      (0x03, sp), a
  74         jra     __modulong_00103
  75 ;       device/lib/_modulong.c: 354: do
  76 __modulong_00117:
  77         ld      a, (0x03, sp)
  78         ld      (0x02, sp), a
  79 __modulong_00108:
  80 ;       device/lib/_modulong.c: 356: if (a >= b)
  81         ldw     x, (0x09, sp)
  82         subw    x, (0x0d, sp)
  83         ld      a, (0x08, sp)
  84         sbc     a, (0x0c, sp)
  85         ld      yl, a
  86         ld      a, (0x07, sp)
  87         sbc     a, (0x0b, sp)
  88         jrc     __modulong_00107
  89 ;       device/lib/_modulong.c: 357: a -= b;
  90         ldw     (0x09, sp), x
  91         ld      yh, a
  92         ldw     (0x07, sp), y
  93 __modulong_00107:
  94 ;       device/lib/_modulong.c: 358: b >>= 1;
  95         ldw     y, (0x0d, sp)
  96         ldw     x, (0x0b, sp)
  97         srlw    x
  98         rrcw    y
  99         ldw     (0x0d, sp), y
 100         ldw     (0x0b, sp), x
 101 ;       device/lib/_modulong.c: 360: while (count--);
 102         ld      a, (0x02, sp)
 103         dec     (0x02, sp)
 104         tnz     a
 105         jrne    __modulong_00108
 106 ;       device/lib/_modulong.c: 362: return a;
 107         ldw     x, (0x09, sp)
 108         ldw     y, (0x07, sp)
 109         addw    sp, #3
 110         retf