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Annotation of gcc/tm-i386gas.h, revision 1.1.1.1

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: 
                      6: GNU CC is distributed in the hope that it will be useful,
                      7: but WITHOUT ANY WARRANTY.  No author or distributor
                      8: accepts responsibility to anyone for the consequences of using it
                      9: or for whether it serves any particular purpose or works at all,
                     10: unless he says so in writing.  Refer to the GNU CC General Public
                     11: License for full details.
                     12: 
                     13: Everyone is granted permission to copy, modify and redistribute
                     14: GNU CC, but only under the conditions described in the
                     15: GNU CC General Public License.   A copy of this license is
                     16: supposed to have been given to you along with GNU CC so you
                     17: can know your rights and responsibilities.  It should be in a
                     18: file named COPYING.  Among other things, the copyright notice
                     19: and this notice must be preserved on all copies.  */
                     20: 
                     21: 
                     22: #include "tm-i386.h"
                     23: /* Use the bsd assembler syntax.  */
                     24: /* we need to do this because gas is really a bsd style assembler,
                     25:  * and so doesn't work well this these att-isms:
                     26:  *
                     27:  *  ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
                     28:  *  ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
                     29:  *   used to define bss static space
                     30:  *  ASM_OUTPUT_ALIGN's arg is N instead of log(N) for att
                     31:  *
                     32:  * Next is the question of whether to uses underscores.  RMS didn't
                     33:  * like this idea at first, but since it is now obvious that we
                     34:  * need this separate tm file for use with gas, at least to get
                     35:  * dbx debugging info, I think we should also switch to underscores.
                     36:  * We can keep tm-i386v for real att style output, and the few
                     37:  * people who want both form will have to compile twice.
                     38:  */
                     39: 
                     40: #include "tm-bsd386.h"
                     41: 
                     42: /* these come from tm-bsd386.h, but are specific to sequent */
                     43: #undef DBX_NO_XREFS
                     44: #undef DBX_CONTIN_LENGTH
                     45: 
                     46: /* By default, target has a 80387.  */
                     47: 
                     48: #define TARGET_DEFAULT 1
                     49: 
                     50: /* Specify predefined symbols in preprocessor.  */
                     51: 
                     52: #define CPP_PREDEFINES "-Dunix -Di386"
                     53: 
                     54: /* Allow #ident and #sccs in preprocessor.  */
                     55: 
                     56: #define IDENT_DIRECTIVE
                     57: #define SCCS_DIRECTIVE
                     58: 
                     59: /* We do not want to output SDB debugging information.  */
                     60: 
                     61: #undef SDB_DEBUGGING_INFO
                     62: 
                     63: /* We want to output DBX debugging information.  */
                     64: 
                     65: #define DBX_DEBUGGING_INFO
                     66: 
                     67: /* Implicit library calls should use memcpy, not bcopy, etc.  */
                     68: 
                     69: #define TARGET_MEM_FUNCTIONS
                     70: 
                     71: 
                     72: /* Machines that use the AT&T assembler syntax
                     73:    also return floating point values in an FP register.  */
                     74: /* Define how to find the value returned by a function.
                     75:    VALTYPE is the data type of the value (as a tree).
                     76:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
                     77:    otherwise, FUNC is 0.  */
                     78: 
                     79: #define VALUE_REGNO(MODE) \
                     80:   (((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
                     81: 
                     82: /* 1 if N is a possible register number for a function value. */
                     83: 
                     84: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
                     85: 
                     86: #undef ASM_FILE_START
                     87: #define ASM_FILE_START(FILE) \
                     88:   fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);

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