libgcc/config/rl78/umindi3.S

   1 ;   Copyright (C) 2017-2024 Free Software Foundation, Inc.
   2 ;   Contributed by Sebastian Perta.
   3 ;
   4 ; This file is free software; you can redistribute it and/or modify it
   5 ; under the terms of the GNU General Public License as published by the
   6 ; Free Software Foundation; either version 3, or (at your option) any
   7 ; later version.
   8 ;
   9 ; This file is distributed in the hope that it will be useful, but
  10 ; WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 ; General Public License for more details.
  13 ;
  14 ; Under Section 7 of GPL version 3, you are granted additional
  15 ; permissions described in the GCC Runtime Library Exception, version
  16 ; 3.1, as published by the Free Software Foundation.
  17 ;
  18 ; You should have received a copy of the GNU General Public License and
  19 ; a copy of the GCC Runtime Library Exception along with this program;
  20 ; see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  21 ; <http://www.gnu.org/licenses/>.
  22
  23
  24 #include "vregs.h"
  25
  26     .text
  27
  28 START_FUNC ___umindi3
  29
  30     ; copy first argument/operand to the output registers
  31     movw   ax, [sp+4]
  32     movw   r8, ax
  33     movw   ax, [sp+6]
  34     movw   r10, ax
  35     movw   ax, [sp+8]
  36     movw   r12, ax
  37     movw   ax, [sp+10]
  38     movw   r14, ax
  39
  40     ; use 16-bit compares from the most significant words downto the least significant ones
  41     movw   ax, [sp+18]
  42     cmpw   ax, r14
  43     bc     $.L1
  44     bnz    $.L2
  45
  46     movw   ax, [sp+16]
  47     cmpw   ax, r12
  48     bc     $.L1
  49     bnz    $.L2
  50
  51     movw   ax, [sp+14]
  52     cmpw   ax, r10
  53     bc     $.L1
  54     bnz    $.L2
  55
  56     movw   ax, [sp+12]
  57     cmpw   ax, r8
  58     bc     $.L1
  59     ret
  60
  61 .L1:
  62     ; copy second argument/operand to the output registers
  63     movw   ax, [sp+12]
  64     movw   r8, ax
  65     movw   ax, [sp+14]
  66     movw   r10, ax
  67     movw   ax, [sp+16]
  68     movw   r12, ax
  69     movw   ax, [sp+18]
  70     movw   r14, ax
  71 .L2:
  72     ret
  73
  74 END_FUNC ___umindi3