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Annotation of gcc/config/tm-i386v.h, revision 1.1.1.1

1.1       root        1: /* Definitions for Intel 386 running system V.
                      2:    Copyright (C) 1988 Free Software Foundation, Inc.
                      3: 
                      4: This file is part of GNU CC.
                      5: 
                      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: 
                     11: GNU CC is distributed in the hope that it will be useful,
                     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.  */
                     19: 
                     20: 
                     21: #include "tm-i386.h"
                     22: 
                     23: /* Use the ATT assembler syntax.  */
                     24: 
                     25: #include "tm-att386.h"
                     26: 
                     27: /* By default, target has a 80387.  */
                     28: 
                     29: #define TARGET_DEFAULT 1
                     30: 
                     31: /* Use crt1.o as a startup file and crtn.o as a closing file.  */
                     32: 
                     33: #define STARTFILE_SPEC  \
                     34:   "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
                     35: 
                     36: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
                     37: 
                     38: /* Specify predefined symbols in preprocessor.  */
                     39: 
                     40: #define CPP_PREDEFINES "-Dunix -Di386"
                     41: 
                     42: /* Allow #sccs in preprocessor.  */
                     43: 
                     44: #define SCCS_DIRECTIVE
                     45: 
                     46: /* Output #ident as a .ident.  */
                     47: 
                     48: #define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
                     49: 
                     50: /* We want to output SDB debugging information.  */
                     51: 
                     52: #define SDB_DEBUGGING_INFO
                     53: 
                     54: /* We don't want to output DBX debugging information.  */
                     55: 
                     56: #undef DBX_DEBUGGING_INFO
                     57: 
                     58: /* Implicit library calls should use memcpy, not bcopy, etc.  */
                     59: 
                     60: #define TARGET_MEM_FUNCTIONS
                     61: 
                     62: /* Writing `int' for a bitfield forces int alignment for the structure.  */
                     63: 
                     64: #define PCC_BITFIELD_TYPE_MATTERS
                     65: 
                     66: /* Don't write a `.optim' pseudo; this assembler doesn't handle them.  */
                     67: 
                     68: #undef ASM_FILE_START_1
                     69: #define ASM_FILE_START_1(FILE)
                     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)

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