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