arch/x86/math-emu/div_small.S

   1         .file   "div_small.S"
   2 /*---------------------------------------------------------------------------+
   3  |  div_small.S                                                              |
   4  |                                                                           |
   5  | Divide a 64 bit integer by a 32 bit integer & return remainder.           |
   6  |                                                                           |
   7  | Copyright (C) 1992,1995                                                   |
   8  |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
   9  |                       Australia.  E-mail billm@jacobi.maths.monash.edu.au |
  10  |                                                                           |
  11  |                                                                           |
  12  +---------------------------------------------------------------------------*/
  13
  14 /*---------------------------------------------------------------------------+
  15  |    unsigned long FPU_div_small(unsigned long long *x, unsigned long y)    |
  16  +---------------------------------------------------------------------------*/
  17
  18 #include "fpu_emu.h"
  19
  20 .text
  21 ENTRY(FPU_div_small)
  22         pushl   %ebp
  23         movl    %esp,%ebp
  24
  25         pushl   %esi
  26
  27         movl    PARAM1,%esi     /* pointer to num */
  28         movl    PARAM2,%ecx     /* The denominator */
  29
  30         movl    4(%esi),%eax    /* Get the current num msw */
  31         xorl    %edx,%edx
  32         divl    %ecx
  33
  34         movl    %eax,4(%esi)
  35
  36         movl    (%esi),%eax     /* Get the num lsw */
  37         divl    %ecx
  38
  39         movl    %eax,(%esi)
  40
  41         movl    %edx,%eax       /* Return the remainder in eax */
  42
  43         popl    %esi
  44
  45         leave
  46         ret
  47 ENDPROC(FPU_div_small)