gcc/halfpic.h

   1 /* OSF/rose half-pic support definitions.
   2    Copyright (C) 1992, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 #ifndef NO_HALF_PIC
  22
  23 #ifdef ANSI_PROTOTYPES
  24 union tree_node;                /* forward reference */
  25 struct rtx_def;
  26 #endif
  27
  28 /* Declare the variable flag_half_pic as 'int' instead of 'extern
  29    int', so that BSS variables are created (even though this is not
  30    strict ANSI).  This is because rtl.c now refers to the
  31    CONSTANT_ADDRESS_P macro, which in turn refers to flag_half_pic,
  32    and wants to call half_pic_address_p, whose address we also store
  33    in a BSS variable.  This way, the gen* programs won't get
  34    unknown symbol errors when being linked (flag_half_pic will never
  35    be true in the gen* programs).  */
  36
  37 int flag_half_pic;                      /* Global half-pic flag.  */
  38 int (*ptr_half_pic_address_p) PARAMS ((struct rtx_def *)); /* ptr to half_pic_address_p () */
  39
  40 extern int  half_pic_number_ptrs;                               /* # distinct pointers found */
  41 extern int  half_pic_number_refs;                               /* # half-pic references */
  42 extern void half_pic_encode PARAMS ((union tree_node *));       /* encode whether half-pic */
  43 extern void half_pic_declare PARAMS ((const char *));           /* declare object local */
  44 extern void half_pic_external PARAMS ((const char *));          /* declare object external */
  45 extern void half_pic_init PARAMS ((void));                      /* half_pic initialization */
  46 extern int  half_pic_address_p PARAMS ((struct rtx_def *));     /* true if an address is half-pic */
  47 extern struct rtx_def *half_pic_ptr PARAMS ((struct rtx_def *));        /* return RTX for half-pic pointer */
  48 #ifdef BUFSIZ
  49 extern void half_pic_finish PARAMS ((FILE *));  /* half_pic termination */
  50 #endif
  51
  52 /* Macros to provide access to the half-pic stuff (so they can easily
  53    be stubbed out.  */
  54
  55 #define HALF_PIC_P()            (flag_half_pic)
  56 #define HALF_PIC_NUMBER_PTRS    (half_pic_number_ptrs)
  57 #define HALF_PIC_NUMBER_REFS    (half_pic_number_refs)
  58
  59 #define HALF_PIC_ENCODE(DECL)   half_pic_encode (DECL)
  60 #define HALF_PIC_DECLARE(NAME)  half_pic_declare (NAME)
  61 #define HALF_PIC_EXTERNAL(NAME) half_pic_external (NAME)
  62 #define HALF_PIC_INIT()         half_pic_init ()
  63 #define HALF_PIC_FINISH(STREAM) half_pic_finish (STREAM)
  64 #define HALF_PIC_ADDRESS_P(X)   ((*ptr_half_pic_address_p) (X))
  65 #define HALF_PIC_PTR(X)         half_pic_ptr (X)
  66
  67 /* Prefix for half-pic names */
  68 #ifndef HALF_PIC_PREFIX
  69 #define HALF_PIC_PREFIX "__pic_"
  70 #endif
  71
  72 #endif /* NO_HALF_PIC */