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1 /* Definitions of target machine for GNU compiler, for a PDP with 2BSD
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2 Copyright (C) 1995, 1996, 1999, 2000, 2007 Free Software Foundation, Inc.
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3 Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #define TWO_BSD
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22
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23 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
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24 the stack pointer does not matter. The value is tested only in
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25 functions that have frame pointers.
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26 No definition is equivalent to always zero. */
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27
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28 #undef EXIT_IGNORE_STACK
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29 #define EXIT_IGNORE_STACK 1
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30
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31 #undef INITIAL_FRAME_POINTER_OFFSET
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32 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) \
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33 { \
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34 int offset; \
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35 offset = get_frame_size(); \
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36 offset = (offset <= 2)? 0: (offset -2); \
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37 (DEPTH_VAR) = offset+10; \
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38 }
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39
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40 /* Value should be nonzero if functions must have frame pointers.
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41 Zero means the frame pointer need not be set up (and parms
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42 may be accessed via the stack pointer) in functions that seem suitable.
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43 This is computed in `reload', in reload1.c.
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44 */
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45
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46 #undef FRAME_POINTER_REQUIRED
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47 #define FRAME_POINTER_REQUIRED 1
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48
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49 /* Offset within stack frame to start allocating local variables at.
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50 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
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51 first local allocated. Otherwise, it is the offset to the BEGINNING
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52 of the first local allocated. */
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53 #undef STARTING_FRAME_OFFSET
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54 #define STARTING_FRAME_OFFSET -8
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55
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56
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57 #undef ASM_DECLARE_FUNCTION_NAME
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58 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
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59 do { \
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60 ASM_OUTPUT_LABEL (STREAM, NAME); \
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61 fprintf (STREAM, "~~%s:\n", NAME); \
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62 } while (0)
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63
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64 #undef TARGET_UNIX_ASM_DEFAULT
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65 #define TARGET_UNIX_ASM_DEFAULT MASK_UNIX_ASM
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