kernel/arch/m68k/fpsp040/x_bsun.S

   1 |
   2 |       x_bsun.sa 3.3 7/1/91
   3 |
   4 |       fpsp_bsun --- FPSP handler for branch/set on unordered exception
   5 |
   6 |       Copy the PC to FPIAR to maintain 881/882 compatibility
   7 |
   8 |       The real_bsun handler will need to perform further corrective
   9 |       measures as outlined in the 040 User's Manual on pages
  10 |       9-41f, section 9.8.3.
  11 |
  12
  13 |               Copyright (C) Motorola, Inc. 1990
  14 |                       All Rights Reserved
  15 |
  16 |       For details on the license for this file, please see the
  17 |       file, README, in this same directory.
  18
  19 X_BSUN: |idnt    2,1 | Motorola 040 Floating Point Software Package
  20
  21         |section        8
  22
  23 #include "fpsp.h"
  24
  25         |xref   real_bsun
  26
  27         .global fpsp_bsun
  28 fpsp_bsun:
  29 |
  30         link            %a6,#-LOCAL_SIZE
  31         fsave           -(%a7)
  32         moveml          %d0-%d1/%a0-%a1,USER_DA(%a6)
  33         fmovemx %fp0-%fp3,USER_FP0(%a6)
  34         fmoveml %fpcr/%fpsr/%fpiar,USER_FPCR(%a6)
  35
  36 |
  37         movel           EXC_PC(%a6),USER_FPIAR(%a6)
  38 |
  39         moveml          USER_DA(%a6),%d0-%d1/%a0-%a1
  40         fmovemx USER_FP0(%a6),%fp0-%fp3
  41         fmoveml USER_FPCR(%a6),%fpcr/%fpsr/%fpiar
  42         frestore        (%a7)+
  43         unlk            %a6
  44         bral            real_bsun
  45 |
  46         |end