sdcc/device/lib/r3ka/modmixed.s

   1 ;--------------------------------------------------------------------------
   2 ;  modmixed.s
   3 ;
   4 ;  Copyright (C) 2010-2021, 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  __modsuchar
  30 .globl  __moduschar
  31
  32 __moduschar:
  33         ; Zero-extend
  34         ld      e, l
  35         ld      d, #0
  36
  37         ; Sign-extend
  38         ld      l, a
  39         rlca
  40         sbc     a, a
  41         ld      h, a
  42
  43         call    __div16
  44
  45         jp      __get_remainder
  46
  47 __modsuchar:
  48         ld      e, l
  49         ld      l, a
  50         ld      h, #0
  51
  52         call    __div_signexte
  53
  54         jp      __get_remainder
  55