gcc/config/a29k/unix.h

   1 /* Definitions of target machine for GNU compiler, for AMD Am29000 CPU, Unix.
   2    Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc.
   3    Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22
  23 /* We define unix instead of EPI and define unix-style machine names.  */
  24
  25 /* Set our default target to be the 29050; that is the more interesting chip
  26    for Unix systems.  */
  27
  28 #undef TARGET_DEFAULT
  29 #define TARGET_DEFAULT (1+2+16+128)
  30
  31 #undef CPP_PREDEFINES
  32 #define CPP_PREDEFINES "-Dam29k -Da29k -Dam29000 -Asystem=unix -Acpu=a29k -Amachine=a29k"
  33
  34 #undef CPP_SPEC
  35 #define CPP_SPEC "%{!m29000:-Dam29050 -D__am29050__}"
  36
  37 /* Use a default linker configuration file.  */
  38 #undef LINK_SPEC
  39 #define LINK_SPEC "-T default.gld%s"
  40
  41 /* Define the magic numbers that we recognize as COFF.  */
  42
  43 #define MY_ISCOFF(magic) ((magic) == SIPFBOMAGIC || (magic) == SIPRBOMAGIC)
  44
  45 /* For some systems, it is best if double-word objects are aligned on a
  46    doubleword boundary.  We want to maintain compatibility with MetaWare in
  47    a29k.h, but do not feel constrained to do so here.  */
  48
  49 #undef BIGGEST_ALIGNMENT
  50 #define BIGGEST_ALIGNMENT 64
  51
  52 /* Add shared data as a kludge for now.  */
  53
  54 #undef ASM_FILE_START
  55 #define ASM_FILE_START(FILE)                                    \
  56 { const char *p, *after_dir = main_input_filename;              \
  57   if (TARGET_29050)                                             \
  58     fprintf (FILE, "\t.cputype 29050\n");                       \
  59   for (p = main_input_filename; *p; p++)                        \
  60     if (*p == '/')                                              \
  61       after_dir = p + 1;                                        \
  62   fprintf (FILE, "\t.file ");                                   \
  63   output_quoted_string (FILE, after_dir);                       \
  64   fprintf (FILE, "\n");                                         \
  65   if (flag_shared_data)                                         \
  66     fprintf (FILE, "\t.sect .shdata,data\n");                   \
  67   fprintf (FILE, "\t.sect .lit,lit\n");  }
  68
  69 /* Output before shared  data.  */
  70
  71 #define SHARED_SECTION_ASM_OP "\t.use .shdata"
  72
  73 /* If we want shared data, we have to turn off commons.  */
  74
  75 #define OVERRIDE_OPTIONS if (flag_shared_data) flag_no_common = 1;
  76
  77 /* Default to -fno-pcc-struct-return, since we don't have to worry about
  78    compatibility.  */
  79 #define DEFAULT_PCC_STRUCT_RETURN 0
  80
  81 #if 0 /* This would be needed except that the 29k doesn't have strict
  82          alignment requirements.  */
  83
  84 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)                               \
  85   (((TYPE) != 0)                                                        \
  86         ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY)                          \
  87                 ? PARM_BOUNDARY                                         \
  88                 : TYPE_ALIGN(TYPE))                                     \
  89         : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY)                  \
  90                 ? PARM_BOUNDARY                                         \
  91                 : GET_MODE_ALIGNMENT(MODE)))
  92 #endif