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Annotation of gcc/tm-i386gas.h, revision 1.1.1.2

1.1       root        1: /* Definitions for Intel 386 running system V with gnu tools
                      2:    Copyright (C) 1988 Free Software Foundation, Inc.
                      3: 
                      4: This file is part of GNU CC.
                      5: 
1.1.1.2 ! root        6: GNU CC is free software; you can redistribute it and/or modify
        !             7: it under the terms of the GNU General Public License as published by
        !             8: the Free Software Foundation; either version 1, or (at your option)
        !             9: any later version.
        !            10: 
1.1       root       11: GNU CC is distributed in the hope that it will be useful,
1.1.1.2 ! root       12: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: GNU General Public License for more details.
        !            15: 
        !            16: You should have received a copy of the GNU General Public License
        !            17: along with GNU CC; see the file COPYING.  If not, write to
        !            18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
1.1       root       19: 
                     20: 
                     21: #include "tm-i386.h"
                     22: /* Use the bsd assembler syntax.  */
                     23: /* we need to do this because gas is really a bsd style assembler,
                     24:  * and so doesn't work well this these att-isms:
                     25:  *
                     26:  *  ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
                     27:  *  ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
                     28:  *   used to define bss static space
                     29:  *  ASM_OUTPUT_ALIGN's arg is N instead of log(N) for att
                     30:  *
                     31:  * Next is the question of whether to uses underscores.  RMS didn't
                     32:  * like this idea at first, but since it is now obvious that we
                     33:  * need this separate tm file for use with gas, at least to get
                     34:  * dbx debugging info, I think we should also switch to underscores.
                     35:  * We can keep tm-i386v for real att style output, and the few
                     36:  * people who want both form will have to compile twice.
                     37:  */
                     38: 
                     39: #include "tm-bsd386.h"
                     40: 
                     41: /* these come from tm-bsd386.h, but are specific to sequent */
                     42: #undef DBX_NO_XREFS
                     43: #undef DBX_CONTIN_LENGTH
                     44: 
                     45: /* By default, target has a 80387.  */
                     46: 
                     47: #define TARGET_DEFAULT 1
                     48: 
                     49: /* Specify predefined symbols in preprocessor.  */
                     50: 
                     51: #define CPP_PREDEFINES "-Dunix -Di386"
                     52: 
                     53: /* Allow #ident and #sccs in preprocessor.  */
                     54: 
                     55: #define IDENT_DIRECTIVE
                     56: #define SCCS_DIRECTIVE
                     57: 
                     58: /* We do not want to output SDB debugging information.  */
                     59: 
                     60: #undef SDB_DEBUGGING_INFO
                     61: 
                     62: /* We want to output DBX debugging information.  */
                     63: 
                     64: #define DBX_DEBUGGING_INFO
                     65: 
                     66: /* Implicit library calls should use memcpy, not bcopy, etc.  */
                     67: 
                     68: #define TARGET_MEM_FUNCTIONS
                     69: 
                     70: 
                     71: /* Machines that use the AT&T assembler syntax
                     72:    also return floating point values in an FP register.  */
                     73: /* Define how to find the value returned by a function.
                     74:    VALTYPE is the data type of the value (as a tree).
                     75:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
                     76:    otherwise, FUNC is 0.  */
                     77: 
                     78: #define VALUE_REGNO(MODE) \
                     79:   (((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
                     80: 
                     81: /* 1 if N is a possible register number for a function value. */
                     82: 
                     83: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
                     84: 
                     85: #undef ASM_FILE_START
                     86: #define ASM_FILE_START(FILE) \
                     87:   fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);

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