Subversion Repositories openrisc_2011-10-31

/* Definitions for Intel 386 using GAS.

   Copyright (C) 1988, 1993, 1994, 1996, 2002, 2004, 2007, 2008

   Free Software Foundation, Inc.

This file is part of GCC.

GCC 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 3, or (at your option)

any later version.

GCC 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 GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

/* Note that i386/seq-gas.h is a GAS configuration that does not use this

   file.  */

/* Use the bsd assembler syntax.  */

/* we need to do this because gas is really a bsd style assembler,

 * and so doesn't work well this these att-isms:

 *

 *  ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas

 *  ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be

 *   used to define bss static space

 *

 * Next is the question of whether to uses underscores.  RMS didn't

 * like this idea at first, but since it is now obvious that we

 * need this separate tm file for use with gas, at least to get

 * dbx debugging info, I think we should also switch to underscores.

 * We can keep i386v for real att style output, and the few

 * people who want both form will have to compile twice.

 */

/* these come from i386/bsd.h, but are specific to sequent */

#undef DBX_NO_XREFS

#undef DBX_CONTIN_LENGTH

/* Ask for COFF symbols.  */

#define SDB_DEBUGGING_INFO 1

/* Output #ident as a .ident.  */

#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);

/* In the past there was confusion as to what the argument to .align was

   in GAS.  For the last several years the rule has been this: for a.out

   file formats that argument is LOG, and for all other file formats the

   argument is 1<<LOG.

   However, GAS now has .p2align and .balign pseudo-ops so to remove any

   doubt or guess work, and since this file is used for both a.out and other

   file formats, we use one of them.  */

#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN 

#undef ASM_OUTPUT_ALIGN

#define ASM_OUTPUT_ALIGN(FILE,LOG) \

  if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))

#endif

/* A C statement to output to the stdio stream FILE an assembler

   command to advance the location counter to a multiple of 1<<LOG

   bytes if it is within MAX_SKIP bytes.

   This is used to align code labels according to Intel recommendations.  */

#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN

#  define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \

     if ((LOG) != 0) {\

       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \

       else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \

     }

#endif

/* A C statement or statements which output an assembler instruction

   opcode to the stdio stream STREAM.  The macro-operand PTR is a

   variable of type `char *' which points to the opcode name in its

   "internal" form--the form that is written in the machine description.

   GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.

   So use `repe' instead.  */

#undef ASM_OUTPUT_OPCODE

#define ASM_OUTPUT_OPCODE(STREAM, PTR)  \

{                                                                       \

  if ((PTR)[0] == 'r'                                                    \

      && (PTR)[1] == 'e'                                                \

      && (PTR)[2] == 'p')                                               \

    {                                                                   \

      if ((PTR)[3] == 'z')                                              \

        {                                                               \

          fputs ("repe", (STREAM));                                     \

          (PTR) += 4;                                                   \

        }                                                               \

      else if ((PTR)[3] == 'n' && (PTR)[4] == 'z')                      \

        {                                                               \

          fputs ("repne", (STREAM));                                    \

          (PTR) += 5;                                                   \

        }                                                               \

    }                                                                   \

  else                                                                  \

    ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR));                            \

}

/* Define macro used to output shift-double opcodes when the shift

   count is in %cl.  Some assemblers require %cl as an argument;

   some don't.

   GAS requires the %cl argument, so override i386/unix.h.  */

#undef SHIFT_DOUBLE_OMITS_COUNT

#define SHIFT_DOUBLE_OMITS_COUNT 0

/* The comment-starter string as GAS expects it. */

#undef ASM_COMMENT_START

#define ASM_COMMENT_START "#"

#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true