sdcc/device/lib/f8/_divsint.s

   1 ;--------------------------------------------------------------------------
   2 ;  _divsint.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 __divsint
  30         .globl __divuint
  31
  32         .area CODE
  33
  34 ; _divsint (int x, int y)
  35 ; Return quotient in y, remainder in z.
  36 __divsint:
  37         ld      xl, yh
  38         tst     xl
  39         jrnn    x_nonnegative
  40         negw    y
  41 x_nonnegative:
  42
  43         ldw     z, (2, sp)
  44         jrnn    y_nonnegative
  45         negw    z
  46         xor     xl, #0x80
  47 y_nonnegative:
  48
  49         push    xl
  50         pushw   z
  51         call    #__divuint
  52         tst     (2, sp)
  53         jrnn    return_nonnegative
  54         negw    y
  55 return_nonnegative:
  56         addw    sp, #3
  57
  58         ret
  59