arch/m68k-all/exec/copymem.c

   1 /*
   2     Copyright © 1995-2012, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CopyMem()
   6     Lang: english
   7 */
   8
   9 #include <exec/types.h>
  10 #include <exec/execbase.h>
  11 #include <proto/exec.h>
  12 #include <aros/libcall.h>
  13
  14 extern void AROS_SLIB_ENTRY(CopyMem_000,Exec,104)(void);
  15 extern void AROS_SLIB_ENTRY(CopyMem_020,Exec,104)(void);
  16
  17 /*****************************************************************************
  18
  19     NAME */
  20
  21         AROS_LH3I(void, CopyMem,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(CONST_APTR,  source, A0),
  25         AROS_LHA(APTR,  dest,   A1),
  26         AROS_LHA(IPTR,  size,   D0),
  27
  28 /*  LOCATION */
  29         struct ExecBase *, SysBase, 104, Exec)
  30
  31 /*  FUNCTION
  32         Copy some memory from one destination in memory to another using
  33         a fast copying method.
  34
  35     INPUTS
  36         source - Pointer to source area
  37         dest   - Pointer to destination
  38         size   - number of bytes to copy (may be zero)
  39
  40     RESULT
  41
  42     NOTES
  43         The source and destination area are not allowed to overlap.
  44
  45     EXAMPLE
  46
  47     BUGS
  48
  49     SEE ALSO
  50         CopyMemQuick()
  51
  52     INTERNALS
  53
  54 ******************************************************************************/
  55 {
  56     AROS_LIBFUNC_INIT
  57     void (*func)(void);
  58
  59     Disable();
  60     if (SysBase->AttnFlags & AFF_68020) {
  61         /* 68020+ */
  62         func = AROS_SLIB_ENTRY(CopyMem_020, Exec, 104);
  63     } else {
  64         /* 68000/68010 */
  65         func = AROS_SLIB_ENTRY(CopyMem_000, Exec, 104);
  66     }
  67     SetFunction((struct Library *)SysBase, -LIB_VECTSIZE * 104, func);
  68     Enable();
  69
  70     return CopyMem(source, dest, size);
  71
  72     AROS_LIBFUNC_EXIT
  73 } /* CopyMem */