Annotation of gcc/config/tm-aix386.h, revision 1.1.1.1

1.1       root        1: /* Definitions for IBM PS2 running AIX/386.
                      2:    From: Minh Tran-Le <[email protected]>
                      3:    Copyright (C) 1988 Free Software Foundation, Inc.
                      4: 
                      5: This file is part of GNU CC.
                      6: 
                      7: GNU CC is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU General Public License as published by
                      9: the Free Software Foundation; either version 1, or (at your option)
                     10: any later version.
                     11: 
                     12: GNU CC is distributed in the hope that it will be useful,
                     13: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: GNU General Public License for more details.
                     16: 
                     17: You should have received a copy of the GNU General Public License
                     18: along with GNU CC; see the file COPYING.  If not, write to
                     19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     20: 
                     21: 
                     22: #include "tm-i386.h"
                     23: 
                     24: /* Use the ATT assembler syntax.  */
                     25: 
                     26: #include "tm-att386.h"
                     27: 
                     28: /* By default, target has a 80387.  */
                     29: 
                     30: #define TARGET_DEFAULT 1
                     31: 
                     32: /* Use crt1.o as a startup file and crtn.o as a closing file.  */
                     33: 
                     34: #define STARTFILE_SPEC  \
                     35:   "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
                     36: 
                     37: #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} crtn.o%s"
                     38: 
                     39: /* Special flags for the linker.  I don't know what they do.  */
                     40: 
                     41: #define LINK_SPEC "%{!K:-K} %{!T*:-T0x00400000} %{lg} %{g} %{z:-lm}"
                     42: 
                     43: /* Specify predefined symbols in preprocessor.  */
                     44: 
                     45: #define CPP_PREDEFINES "-Dunix -Di386 -DAIX"
                     46: 
                     47: /* special flags for the aix assembler to generate the short form for all
                     48:    qualifying forward reference */
                     49: 
                     50: #define ASM_SPEC "-s2"
                     51: 
                     52: /* Allow #sccs in preprocessor.  */
                     53: 
                     54: #define SCCS_DIRECTIVE
                     55: 
                     56: /* Output #ident as a .ident.  */
                     57: 
                     58: #define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
                     59: 
                     60: /* We don't want to output SDB debugging information. */
                     61: 
                     62: #undef SDB_DEBUGGING_INFO
                     63: #undef ASM_FILE_START
                     64: #define ASM_FILE_START(FILE)                                   \
                     65:   do { fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);    \
                     66:        if (optimize) ASM_FILE_START_1 (FILE);                  \
                     67:      } while (0)
                     68: 
                     69: /* This was suggested, but it shouldn't be right for DBX output. -- RMS
                     70:    #define ASM_OUTPUT_SOURCE_FILENAME(FILE, NAME) */
                     71: 
                     72: /* This is IBM AIX, it has a DBX debugger */
                     73: 
                     74: #define DBX_DEBUGGING_INFO
                     75: 
                     76: /* Implicit library calls should use memcpy, not bcopy, etc.  */
                     77: 
                     78: #define TARGET_MEM_FUNCTIONS
                     79: 
                     80: /* Don't write a `.optim' pseudo; this assembler
                     81:    is said to have a bug when .optim is used.  */
                     82: 
                     83: #undef ASM_FILE_START_1
                     84: #define ASM_FILE_START_1(FILE) fprintf (FILE, "\t.noopt\n");
                     85: 
                     86: /* Machines that use the AT&T assembler syntax
                     87:    also return floating point values in an FP register.  */
                     88: /* Define how to find the value returned by a function.
                     89:    VALTYPE is the data type of the value (as a tree).
                     90:    If the precise function being called is known, FUNC is its FUNCTION_DECL;
                     91:    otherwise, FUNC is 0.  */
                     92: 
                     93: #define VALUE_REGNO(MODE) \
                     94:   (((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
                     95: 
                     96: /* 1 if N is a possible register number for a function value. */
                     97: 
                     98: #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)

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