gcc/config/rs6000/aix31.h

   1 /* Definitions of target machine for GNU compiler,
   2    for IBM RS/6000 running AIX version 3.1.
   3    Copyright (C) 1993,1997, 2000, 2001 Free Software Foundation, Inc.
   4    Contributed by Richard Kenner (kenner@nyu.edu)
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23
  24 /* Output something to declare an external symbol to the assembler.  Most
  25    assemblers don't need this.
  26
  27    If we haven't already, add "[RW]" (or "[DS]" for a function) to the
  28    name.  Normally we write this out along with the name.  In the few cases
  29    where we can't, it gets stripped off.  */
  30
  31 #undef ASM_OUTPUT_EXTERNAL
  32 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)   \
  33 { rtx _symref = XEXP (DECL_RTL (DECL), 0);      \
  34   if ((TREE_CODE (DECL) == VAR_DECL             \
  35        || TREE_CODE (DECL) == FUNCTION_DECL)    \
  36       && (NAME)[strlen (NAME) - 1] != ']')      \
  37     {                                           \
  38       char *_name = (char *) permalloc (strlen (XSTR (_symref, 0)) + 5); \
  39       strcpy (_name, XSTR (_symref, 0));        \
  40       strcat (_name, TREE_CODE (DECL) == FUNCTION_DECL ? "[DS]" : "[RW]"); \
  41       XSTR (_symref, 0) = _name;                \
  42     }                                           \
  43   fputs ("\t.extern ", FILE);                   \
  44   assemble_name (FILE, XSTR (_symref, 0));      \
  45   if (TREE_CODE (DECL) == FUNCTION_DECL)        \
  46     {                                           \
  47       fputs ("\n\t.extern .", FILE);            \
  48       RS6000_OUTPUT_BASENAME (FILE, XSTR (_symref, 0)); \
  49     }                                           \
  50   putc ('\n', FILE);                            \
  51 }
  52
  53 /* Similar, but for libcall.  We only have to worry about the function name,
  54    not that of the descriptor.  */
  55
  56 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)  \
  57 { fputs ("\t.extern .", FILE);                  \
  58   assemble_name (FILE, XSTR (FUN, 0));          \
  59   putc ('\n', FILE);                            \
  60 }
  61
  62 /* AIX 3.2 defined _AIX32, but older versions do not.  */
  63 #undef CPP_PREDEFINES
  64 #define CPP_PREDEFINES "-D_IBMR2 -D_AIX -Asystem=unix -Asystem=aix -Acpu=rs6000 -Amachine=rs6000"
  65
  66 /* AIX 3.1 uses bit 15 in CROR as the magic nop.  */
  67 #undef RS6000_CALL_GLUE
  68 #define RS6000_CALL_GLUE "cror 15,15,15"
  69
  70 /* AIX 3.1 does not prepend underscores to itrunc, uitrunc, or mcount.  */
  71 #undef RS6000_ITRUNC
  72 #define RS6000_ITRUNC "itrunc"
  73 #undef RS6000_UITRUNC
  74 #define RS6000_UITRUNC "uitrunc"
  75 #undef RS6000_MCOUNT
  76 #define RS6000_MCOUNT ".mcount"
  77