--- /dev/null
+/* Definitions of target machine for GNU compiler, for a PDP with 2BSD
+ Copyright (C) 1995 Free Software Foundation, Inc.
+ Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "pdp11/pdp11.h"
+
+/* This macro generates the assembly code for function entry. */
+#undef FUNCTION_PROLOGUE
+#define FUNCTION_PROLOGUE(FILE, SIZE) \
+do { \
+fprintf(FILE, "\tjsr r5, csv\n"); \
+if ((SIZE) != 0) \
+ { \
+ fprintf(FILE, "\t/*abuse empty parameter slot for locals!*/\n"); \
+ if ((SIZE) > 2) \
+ fprintf(FILE, "\tsub $%d, sp\n", (SIZE)-2); \
+ }; \
+} while (0)
+
+/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
+ the stack pointer does not matter. The value is tested only in
+ functions that have frame pointers.
+ No definition is equivalent to always zero. */
+
+#undef EXIT_IGNORE_STACK
+#define EXIT_IGNORE_STACK 1
+
+/* This macro generates the assembly code for function exit,
+ on machines that need it. If FUNCTION_EPILOGUE is not defined
+ then individual return instructions are generated for each
+ return statement. Args are same as for FUNCTION_PROLOGUE.
+*/
+
+#undef FUNCTION_EPILOGUE
+#define FUNCTION_EPILOGUE(FILE, SIZE) \
+do { \
+fprintf(FILE, "\t/* SP ignored by cret? */\n"); \
+fprintf(FILE, "\tjmp cret\n"); \
+} while (0)
+
+#undef INITIAL_FRAME_POINTER_OFFSET
+#define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) \
+{ \
+ int offset, regno; \
+ offset = get_frame_size(); \
+ offset = (offset <= 2)? 0: (offset -2); \
+ (DEPTH_VAR) = offset+10; \
+}
+
+/* Value should be nonzero if functions must have frame pointers.
+ Zero means the frame pointer need not be set up (and parms
+ may be accessed via the stack pointer) in functions that seem suitable.
+ This is computed in `reload', in reload1.c.
+ */
+
+#undef FRAME_POINTER_REQUIRED
+#define FRAME_POINTER_REQUIRED 1
+
+/* Offset within stack frame to start allocating local variables at.
+ If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
+ first local allocated. Otherwise, it is the offset to the BEGINNING
+ of the first local allocated. */
+#undef STARTING_FRAME_OFFSET
+#define STARTING_FRAME_OFFSET -8
+
+
+#undef ASM_DECLARE_FUNCTION_NAME
+#define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
+do { \
+ASM_OUTPUT_LABEL (STREAM, NAME); \
+fprintf (STREAM, "~~%s:\n", NAME); \
+} while (0)