3b1.h

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/* Definitions of target machine for GNU compiler.
   AT&T UNIX PC version (pc7300, 3b1)
   Copyright (C) 1987, 1993, 1996, 1999, 2000 Free Software Foundation, Inc.
   Contributed by Alex Crain ([e-mail]).

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 2, 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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#define SGS_SWITCH_TABLES	/* Different switch table handling */

#include "m68k/hp320.h"

/* See m68k.h.  0 means 680[01]0 with no 68881.  */

#undef TARGET_DEFAULT
#define	TARGET_DEFAULT 0

/* Don't try using XFmode.  */
#undef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE 64

/* -m68020 requires special flags to the assembler.  */

#undef ASM_SPEC
#define ASM_SPEC "%{m68020:-68020}%{!m68020:-68010} %{m68881:-68881}"

/* we use /lib/libp/lib*  when profiling */

#undef LIB_SPEC
#define LIB_SPEC "%{!shlib:%{p:-L/lib/libp} %{pg:-L/lib/libp} -lc}"

/* shared libraries need to use crt0s.o  */

#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
  "%{!shlib:%{pg:mcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}\
   %{shlib:crt0s.o%s shlib.ifile%s} "

/* Make output for SDB.  */

#define SDB_DEBUGGING_INFO 1

/* The .file command should always begin the output.  */

#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
output_file_directive ((FILE), main_input_filename)

/* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
   This will control the use of inline 68881 insns in certain macros.  */

#undef CPP_SPEC
#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"

/* Names to predefine in the preprocessor for this target machine.  */
/* ihnp4!lmayk![e-mail] says mc68000 and m68k should not be here.  */

#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dmc68k -Dunix -Dunixpc -D__motorola__ -Asystem=unix  -Asystem=svr3 -Acpu=m68k -Amachine=m68k"

#undef REGISTER_NAMES
#define REGISTER_NAMES \
{"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",	\
 "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",	\
 "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7"}

/* Specify how to pad function arguments.
   Value should be `upward', `downward' or `none'.
   Same as the default, except no padding for large or variable-size args.  */

#define FUNCTION_ARG_PADDING(MODE, TYPE)				\
  (((MODE) == BLKmode							\
    ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST		\
       && int_size_in_bytes (TYPE) < PARM_BOUNDARY / BITS_PER_UNIT)	\
    : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)				\
   ? downward : none)

/* The 3b1 does not have `atexit'.  */

#define NEED_ATEXIT

/* Override parts of m68k.h to fit the SGS-3b1 assembler.  */

#undef TARGET_VERSION
#undef ASM_FORMAT_PRIVATE_NAME
#undef ASM_OUTPUT_ALIGN
#undef ASM_OUTPUT_SOURCE_FILENAME
#undef ASM_OUTPUT_SOURCE_LINE
#undef PRINT_OPERAND_ADDRESS
#undef ASM_GENERATE_INTERNAL_LABEL
#undef FUNCTION_PROFILER
#undef ASM_OUTPUT_ADDR_VEC_ELT
#undef ASM_OUTPUT_ADDR_DIFF_ELT
#undef ASM_OUTPUT_INTERNAL_LABEL
#undef ASM_OUTPUT_OPCODE
#undef ASM_OUTPUT_LOCAL
#undef USER_LABEL_PREFIX
#undef ASM_OUTPUT_ASCII

#define TARGET_VERSION fprintf (stderr, " (68k, SGS/AT&T unixpc syntax)");

/* Store in OUTPUT a string (made with alloca) containing
   an assembler-name for a local static variable named NAME.
   LABELNO is an integer which is different for each call.  */

#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)	\
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 12),	\
  sprintf ((OUTPUT), "%s_%%%d", (NAME), (LABELNO)))

#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
do {					\
  if ((LOG) == 1)			\
    fprintf (FILE, "\teven\n");	\
  else if ((LOG) != 0)			\
    abort ();				\
} while (0)

/* This is how to output an assembler line
   that says to advance the location counter by SIZE bytes.  */

#undef ASM_OUTPUT_SKIP
#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\tspace %d\n", (SIZE))

/* Can't use ASM_OUTPUT_SKIP in text section; it doesn't leave 0s.  */

#define ASM_NO_SKIP_IN_TEXT 1

/* The beginnings of sdb support...  */

#define ASM_OUTPUT_SOURCE_FILENAME(FILE, FILENAME) \
  do {	fprintf (FILE, "\tfile\t");		\
	output_quoted_string (FILE, FILENAME);	\
	fprintf (FILE, "\n");			\
  } while (0)

#define ASM_OUTPUT_SOURCE_LINE(FILE, LINENO)	\
  fprintf (FILE, "\tln\t%d\n",			\
	   (sdb_begin_function_line		\
	    ? (LINENO) - sdb_begin_function_line : 1))

/* Yet another null terminated string format.  */

#define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \
  do { register size_t sp = 0, lp = 0, limit = (LEN); \
    fprintf ((FILE), "\tbyte\t"); \
  loop: \
    if ((PTR)[sp] > ' ' && ! ((PTR)[sp] & 0x80) && (PTR)[sp] != '\\') \
      { lp += 3; \
	fprintf ((FILE), "'%c", (PTR)[sp]); } \
    else \
      { lp += 5; \
	fprintf ((FILE), "0x%x", (PTR)[sp]); } \
    if (++sp < limit) \
      {	if (lp > 60) \
	  { lp = 0; \
	    fprintf ((FILE), "\n%s", ASCII_DATA_ASM_OP); }	\
	else \
	  putc (',', (FILE)); \
	goto loop; } \
    putc ('\n', (FILE)); } while (0)

/* Note that in the case of the movhi which fetches an element of
   an ADDR_DIFF_VEC the offset output is too large by 2.
   This is because the 3b1 assembler refuses to subtract 2.
   ASM_OUTPUT_CASE_LABEL, below, compensates for this.  */

#define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
{ register rtx reg1, reg2, breg, ireg;					\
  register rtx addr = ADDR;						\
  rtx offset;								\
  switch (GET_CODE (addr))						\
    {									\
    case REG:								\
      fprintf (FILE, "(%s)", reg_names[REGNO (addr)]);			\
      break;								\
    case PRE_DEC:							\
      fprintf (FILE, "-(%s)", reg_names[REGNO (XEXP (addr, 0))]);	\
      break;								\
    case POST_INC:							\
      fprintf (FILE, "(%s)+", reg_names[REGNO (XEXP (addr, 0))]);	\
      break;								\
    case PLUS:								\
      reg1 = 0;	reg2 = 0;						\
      ireg = 0;	breg = 0;						\
      offset = 0;							\
      if (CONSTANT_ADDRESS_P (XEXP (addr, 0)))				\
	{								\
	  offset = XEXP (addr, 0);					\
	  addr = XEXP (addr, 1);					\
	}								\
      else if (CONSTANT_ADDRESS_P (XEXP (addr, 1)))			\
	{								\
	  offset = XEXP (addr, 1);					\
	  addr = XEXP (addr, 0);					\
	}								\
      if (GET_CODE (addr) != PLUS) ;					\
      else if (GET_CODE (XEXP (addr, 0)) == SIGN_EXTEND)		\
	{								\
	  reg1 = XEXP (addr, 0);					\
	  addr = XEXP (addr, 1);					\
	}								\
      else if (GET_CODE (XEXP (addr, 1)) == SIGN_EXTEND)		\
	{								\
	  reg1 = XEXP (addr, 1);					\
	  addr = XEXP (addr, 0);					\
	}								\
      else if (GET_CODE (XEXP (addr, 0)) == MULT)			\
	{								\
	  reg1 = XEXP (addr, 0);					\
	  addr = XEXP (addr, 1);					\
	}								\
      else if (GET_CODE (XEXP (addr, 1)) == MULT)			\
	{								\
	  reg1 = XEXP (addr, 1);					\
	  addr = XEXP (addr, 0);					\
	}								\
      else if (GET_CODE (XEXP (addr, 0)) == REG)			\
	{								\
	  reg1 = XEXP (addr, 0);					\
	  addr = XEXP (addr, 1);					\
	}								\
      else if (GET_CODE (XEXP (addr, 1)) == REG)			\
	{								\
	  reg1 = XEXP (addr, 1);					\
	  addr = XEXP (addr, 0);					\
	}								\