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Annotation of gcc/config/a29k/unix.h, revision 1.1.1.4

1.1       root        1: /* Definitions of target machine for GNU compiler, for AMD Am29000 CPU, Unix.
1.1.1.4 ! root        2:    Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
        !             3:    Contributed by Richard Kenner ([email protected])
1.1       root        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
1.1.1.4 ! root       19: the Free Software Foundation, 59 Temple Place - Suite 330,
        !            20: Boston, MA 02111-1307, USA.  */
1.1       root       21: 
                     22: 
                     23: /* This is mostly the same as a29k.h, except that we define unix instead of
                     24:    EPI and define unix-style machine names.  */
                     25: 
                     26: #include "a29k/a29k.h"
                     27: 
                     28: /* Set our default target to be the 29050; that is the more interesting chip
                     29:    for Unix systems.  */
                     30: 
                     31: #undef TARGET_DEFAULT
1.1.1.3   root       32: #define TARGET_DEFAULT (1+2+16+128)
1.1       root       33: 
                     34: #undef CPP_PREDEFINES
1.1.1.2   root       35: #define CPP_PREDEFINES "-Dam29k -Da29k -Dam29000 -Asystem(unix) -Acpu(a29k) -Amachine(a29k)"
1.1       root       36: 
                     37: #undef CPP_SPEC
                     38: #define CPP_SPEC "%{!m29000:-Dam29050 -D__am29050__}"
                     39: 
                     40: /* Use a default linker configuration file.  */
                     41: #undef LINK_SPEC
                     42: #define LINK_SPEC "-T default.gld%s"
                     43: 
                     44: /* Define the magic numbers that we recognize as COFF.  */
                     45: 
                     46: #define MY_ISCOFF(magic) ((magic) == SIPFBOMAGIC || (magic) == SIPRBOMAGIC)
                     47: 
                     48: /* For some systems, it is best if double-word objects are aligned on a 
                     49:    doubleword boundary.  We want to maintain compatibility with MetaWare in
                     50:    a29k.h, but do not feel constrained to do so here.  */
                     51: 
                     52: #undef BIGGEST_ALIGNMENT
                     53: #define BIGGEST_ALIGNMENT 64
                     54: 
                     55: /* Add shared data as a kludge for now.  */
                     56: 
                     57: #undef ASM_FILE_START
                     58: #define ASM_FILE_START(FILE)                                   \
                     59: { char *p, *after_dir = main_input_filename;                   \
                     60:   if (TARGET_29050)                                            \
                     61:     fprintf (FILE, "\t.cputype 29050\n");                      \
                     62:   for (p = main_input_filename; *p; p++)                       \
                     63:     if (*p == '/')                                             \
                     64:       after_dir = p + 1;                                       \
1.1.1.2   root       65:   fprintf (FILE, "\t.file ");                                  \
                     66:   output_quoted_string (FILE, after_dir);                      \
                     67:   fprintf (FILE, "\n");                                                \
1.1       root       68:   if (flag_shared_data)                                                \
                     69:     fprintf (FILE, "\t.sect .shdata,data\n");                  \
                     70:   fprintf (FILE, "\t.sect .lit,lit\n");  }
                     71: 
                     72: /* Output before shared  data.  */
                     73: 
                     74: #define SHARED_SECTION_ASM_OP "\t.use .shdata"
                     75: 
                     76: /* If we want shared data, we have to turn off commons.  */
                     77: 
                     78: #define OVERRIDE_OPTIONS if (flag_shared_data) flag_no_common = 1;
                     79: 
1.1.1.4 ! root       80: /* Default to -fno-pcc-struct-return, since we don't have to worry about
        !            81:    compatibility.  */
        !            82: #define DEFAULT_PCC_STRUCT_RETURN 0
        !            83: 
1.1       root       84: #if 0 /* This would be needed except that the 29k doesn't have strict
                     85:         alignment requirements.  */
                     86: 
                     87: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)                              \
                     88:   (((TYPE) != 0)                                                       \
                     89:        ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY)                          \
                     90:                ? PARM_BOUNDARY                                         \
                     91:                : TYPE_ALIGN(TYPE))                                     \
                     92:        : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY)                  \
                     93:                ? PARM_BOUNDARY                                         \
                     94:                : GET_MODE_ALIGNMENT(MODE)))
                     95: #endif

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