tm-att386.h

这是完整的gcc源代码

/* Definitions for AT&T assembler syntax for the Intel 80386.
   Copyright (C) 1988 Free Software Foundation, Inc.

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.  */


#define TARGET_VERSION fprintf (stderr, " (80386, ATT syntax)");

/* Define the syntax of instructions and addresses.  */

/* Define some concatenation macros to concatenate an opcode
   and one, two or three operands.  In other assembler syntaxes
   they may alter the order of ther operands.  */

#ifdef __STDC__
#define AS2(a,b,c) #a " " #b "," #c
#define AS3(a,b,c,d) #a " " #b "," #c "," #d
#define AS1(a,b) #a " " #b
#else
#define AS1(a,b) "a b"
#define AS2(a,b,c) "a b,c"
#define AS3(a,b,c,d) "a b,c,d"
#endif  

/* Output the size-letter for an opcode.
   CODE is the letter used in an operand spec (L, B, W, S or Q).
   CH is the corresponding lower case letter
     (except if CODE is L then CH is `l').  */
#define PUT_OP_SIZE(CODE,CH,FILE) putc (CH,(FILE))

/* Opcode suffix for fullword insn.  */
#define L_SIZE "l"

/* Prefix for register names in this syntax.  */
#define RP "%"

/* Prefix for immediate operands in this syntax.  */
#define IP "$"

/* Prefix for internally generated assembler labels.  */
#define LPREFIX ".L"

/* Output the prefix for an immediate operand, or for an offset operand.  */
#define PRINT_IMMED_PREFIX(FILE)  fputs ("$", (FILE))
#define PRINT_OFFSET_PREFIX(FILE)  fputs ("$", (FILE))

/* Indirect call instructions should use `*'.  */
#define USE_STAR 1

/* Prefix for a memory-operand X.  */
#define PRINT_PTR(X, FILE)

/* Delimiters that surround base reg and index reg.  */
#define ADDR_BEG(FILE) putc('(', (FILE))
#define ADDR_END(FILE) putc(')', (FILE))

/* Print an index register (whose rtx is IREG).  */
#define PRINT_IREG(FILE,IREG) \
  do								\
  { fputs (",", (FILE)); PRINT_REG ((IREG), 0, (FILE)); }	\
  while (0)
  
/* Print an index scale factor SCALE.  */
#define PRINT_SCALE(FILE,SCALE) \
  if ((SCALE) != 1) fprintf ((FILE), ",%d", (SCALE))

/* Print a base/index combination.
   BREG is the base reg rtx, IREG is the index reg rtx,
   and SCALE is the index scale factor (an integer).  */

#define PRINT_B_I_S(BREG,IREG,SCALE,FILE) \
  { ADDR_BEG (FILE); 				\
    if (BREG) PRINT_REG ((BREG), 0, (FILE));	\
    if ((IREG) != 0)				\
      { PRINT_IREG ((FILE), (IREG));		\
        PRINT_SCALE ((FILE), (SCALE)); }	\
    ADDR_END (FILE); }

/* Define the syntax of pseudo-ops, labels and comments.  */

/* Assembler pseudos to introduce constants of various size.  */

#define ASM_BYTE "\t.byte "
#define ASM_SHORT "\t.value "
#define ASM_LONG "\t.long "
#define ASM_DOUBLE "\t.double "

/* String containing the assembler's comment-starter.  */

#define COMMENT_BEGIN "/"

/* Output at beginning of assembler file.  */
/* The .file command should always begin the output.  */

#undef ASM_FILE_START
#define ASM_FILE_START(FILE)				\
  do { sdbout_filename ((FILE), main_input_filename);	\
       if (optimize) ASM_FILE_START_1 (FILE);		\
     } while (0)

#define ASM_FILE_START_1(FILE) fprintf (FILE, "\t.optim\n")

/* Output to assembler file text saying following lines
   may contain character constants, extra white space, comments, etc.  */

#define ASM_APP_ON "/APP\n"

/* Output to assembler file text saying following lines
   no longer contain unusual constructs.  */

#define ASM_APP_OFF "/NO_APP\n"

/* This is how to output an assembler line
   that says to advance the location counter
   to a multiple of 2**LOG bytes.  */

#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
    if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))

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

/* The `space' pseudo in the text segment outputs nop insns rather than 0s,
   so we must output 0s explicitly in the text segment.  */
#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  if (in_text_section ())                                           	    \
    {									    \
      int i;								    \
      for (i = 0; i < (SIZE) - 20; i += 20)				    \
	fprintf (FILE, "\t.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\n"); \
      if (i < (SIZE))							    \
        {								    \
	  fprintf (FILE, "\t.byte 0");					    \
	  i++;								    \
	  for (; i < (SIZE); i++)					    \
	    fprintf (FILE, ",0");					    \
	  fprintf (FILE, "\n");						    \
	}								    \
    }									    \
  else									    \
    fprintf ((FILE), "\t.set .,.+%u\n", (SIZE))

/* Output before read-only data.  */

#define TEXT_SECTION_ASM_OP ".text"

/* Output before writable data.  */

#define DATA_SECTION_ASM_OP ".data"

/* Output before uninitialized data.  */

#define BSS_SECTION_ASM_OP ".bss"

#define EXTRA_SECTIONS in_bss

#define EXTRA_SECTION_FUNCTIONS					\
void								\
bss_section ()							\
{								\
  if (in_section != in_bss)					\
    {								\
      fprintf (asm_out_file, "%s\n", BSS_SECTION_ASM_OP);	\
      in_section = in_bss;					\
    }								\
}

/* Define the syntax of labels and symbol definitions/declarations.  */

/* This says how to output an assembler line
   to define a global common symbol.  */
/* We don't use ROUNDED because the standard compiler doesn't,
   and the linker gives error messages if a common symbol
   has more than one length value.  */

#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".comm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%u\n", (SIZE)))

/* This says how to output an assembler line
   to define a local common symbol.  */

/* Note that using bss_section here caused errors
   in building shared libraries on system V.3.  */
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)	\
  do {							\
    int align = exact_log2 (ROUNDED);			\
    if (align > 2) align = 2;				\
    data_section ();					\
    ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align);	\
    ASM_OUTPUT_LABEL ((FILE), (NAME));			\
    fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED));	\
  } while (0)

/* This is how to store into the string BUF
   the symbol_ref name of an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.
   This is suitable for output with `assemble_name'.  */

#define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)	\
  sprintf ((BUF), ".%s%d", (PREFIX), (NUMBER))

/* This is how to output a reference to a user-level label named NAME.  */

#define ASM_OUTPUT_LABELREF(FILE,NAME)	\
  fprintf (FILE, "%s", NAME)

/* This is how to output an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.  */

#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
  fprintf (FILE, ".%s%d:\n", PREFIX, NUM)

/* This is how to output a command to make the user-level label named NAME
   defined for reference from other files.  */

#define ASM_GLOBALIZE_LABEL(FILE,NAME)	\
  (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))

/* How to output an ASCII string constant.  */

#define ASM_OUTPUT_ASCII(FILE, p, size) \
{ int i=0; 						\
  while (i < size)					\
    { if (i%10 == 0) { if (i!=0) fprintf (FILE, "\n");	\
		       fprintf (FILE, ASM_BYTE); }	\
      else fprintf (FILE, ",");				\
	fprintf (FILE, "0x%x",(p[i++] & 0377)) ;}	\
      fprintf (FILE, "\n"); }