ptx4-i.h revision 169689 
1/* Target definitions for GCC for Intel 80386 running Dynix/ptx v4
2   Copyright (C) 1996, 2002 Free Software Foundation, Inc.
3
4   Modified from sysv4.h
5   Originally written by Ron Guilmette (rfg@netcom.com).
6   Modified by Tim Wright (timw@sequent.com).
7
8This file is part of GCC.
9
10GCC is free software; you can redistribute it and/or modify
11it under the terms of the GNU General Public License as published by
12the Free Software Foundation; either version 2, or (at your option)
13any later version.
14
15GCC is distributed in the hope that it will be useful,
16but WITHOUT ANY WARRANTY; without even the implied warranty of
17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18GNU General Public License for more details.
19
20You should have received a copy of the GNU General Public License
21along with GCC; see the file COPYING.  If not, write to
22the Free Software Foundation, 51 Franklin Street, Fifth Floor,
23Boston, MA 02110-1301, USA.  */
24
25
26#define TARGET_VERSION fprintf (stderr, " (i386 Sequent Dynix/ptx Version 4)");
27
28/* The svr4 ABI for the i386 says that records and unions are returned
29   in memory.  */
30
31#undef RETURN_IN_MEMORY
32#define RETURN_IN_MEMORY(TYPE) \
33  (TYPE_MODE (TYPE) == BLKmode \
34   || (VECTOR_MODE_P (TYPE_MODE (TYPE)) && int_size_in_bytes (TYPE) == 8))
35
36#define TARGET_OS_CPP_BUILTINS()		\
37  do						\
38    {						\
39	builtin_define_std ("unix");		\
40	builtin_define ("_SEQUENT_");		\
41	builtin_assert ("system=unix");		\
42	builtin_assert ("system=ptx4");		\
43    }						\
44  while (0)
45
46#undef DBX_REGISTER_NUMBER
47#define DBX_REGISTER_NUMBER(n)  svr4_dbx_register_map[n]
48
49/* The routine used to output sequences of byte values.  We use a special
50   version of this for most svr4 targets because doing so makes the
51   generated assembly code more compact (and thus faster to assemble)
52   as well as more readable.  Note that if we find subparts of the
53   character sequence which end with NUL (and which are shorter than
54   STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING.  */
55
56#undef ASM_OUTPUT_ASCII
57#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)				\
58  do									\
59    {									\
60      const unsigned char *_ascii_bytes =				\
61        (const unsigned char *) (STR);					\
62      const unsigned char *limit = _ascii_bytes + (LENGTH);		\
63      unsigned bytes_in_chunk = 0;					\
64      for (; _ascii_bytes < limit; _ascii_bytes++)			\
65        {								\
66	  const unsigned char *p;					\
67	  if (bytes_in_chunk >= 64)					\
68	    {								\
69	      fputc ('\n', (FILE));					\
70	      bytes_in_chunk = 0;					\
71	    }								\
72	  for (p = _ascii_bytes; p < limit && *p != '\0'; p++)		\
73	    continue;							\
74	  if (p < limit && (p - _ascii_bytes) <= (long) STRING_LIMIT)	\
75	    {								\
76	      if (bytes_in_chunk > 0)					\
77		{							\
78		  fputc ('\n', (FILE));					\
79		  bytes_in_chunk = 0;					\
80		}							\
81	      ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);		\
82	      _ascii_bytes = p;						\
83	    }								\
84	  else								\
85	    {								\
86	      if (bytes_in_chunk == 0)					\
87		fprintf ((FILE), "\t.byte\t");				\
88	      else							\
89		fputc (',', (FILE));					\
90	      fprintf ((FILE), "0x%02x", *_ascii_bytes);		\
91	      bytes_in_chunk += 5;					\
92	    }								\
93	}								\
94      if (bytes_in_chunk > 0)						\
95        fprintf ((FILE), "\n");						\
96    }									\
97  while (0)
98