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Annotation of gcc/config/tm-bsd386.h, revision 1.1

1.1     ! root        1: /* Definitions for BSD assembler syntax for Intel 386
        !             2:    (actually AT&T syntax for insns and operands,
        !             3:    adapted to BSD conventions for symbol names and debugging.)
        !             4:    Copyright (C) 1988 Free Software Foundation, Inc.
        !             5: 
        !             6: This file is part of GNU CC.
        !             7: 
        !             8: GNU CC is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU General Public License as published by
        !            10: the Free Software Foundation; either version 1, or (at your option)
        !            11: any later version.
        !            12: 
        !            13: GNU CC is distributed in the hope that it will be useful,
        !            14: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16: GNU General Public License for more details.
        !            17: 
        !            18: You should have received a copy of the GNU General Public License
        !            19: along with GNU CC; see the file COPYING.  If not, write to
        !            20: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            21: 
        !            22: /* Use the Sequent Symmetry assembler syntax.  */
        !            23: 
        !            24: #define TARGET_VERSION fprintf (stderr, " (80386, BSD syntax)");
        !            25: 
        !            26: /* Define some concatenation macros to concatenate an opcode
        !            27:    and one, two or three operands.  In other assembler syntaxes
        !            28:    they may alter the order of ther operands.  */
        !            29: 
        !            30: #ifdef __STDC__
        !            31: #define AS2(a,b,c) #a " " #b "," #c
        !            32: #define AS3(a,b,c,d) #a " " #b "," #c "," #d
        !            33: #define AS1(a,b) #a " " #b
        !            34: #else
        !            35: #define AS1(a,b) "a b"
        !            36: #define AS2(a,b,c) "a b,c"
        !            37: #define AS3(a,b,c,d) "a b,c,d"
        !            38: #endif  
        !            39: 
        !            40: /* Output the size-letter for an opcode.
        !            41:    CODE is the letter used in an operand spec (L, B, W, S or Q).
        !            42:    CH is the corresponding lower case letter
        !            43:      (except if CODE is L then CH is `l').  */
        !            44: #define PUT_OP_SIZE(CODE,CH,FILE) putc (CH,(FILE))
        !            45: 
        !            46: /* Opcode suffix for fullword insn.  */
        !            47: #define L_SIZE "l"
        !            48: 
        !            49: /* Prefix for register names in this syntax.  */
        !            50: #define RP "%"
        !            51: 
        !            52: /* Prefix for immediate operands in this syntax.  */
        !            53: #define IP "$"
        !            54: 
        !            55: /* Prefix for internally generated assembler labels.  */
        !            56: #define LPREFIX "L"
        !            57: 
        !            58: /* Output the prefix for an immediate operand, or for an offset operand.  */
        !            59: #define PRINT_IMMED_PREFIX(FILE)  fputs ("$", (FILE))
        !            60: #define PRINT_OFFSET_PREFIX(FILE)  fputs ("$", (FILE))
        !            61: 
        !            62: /* Indirect call instructions should use `*'.  */
        !            63: #define USE_STAR 1
        !            64: 
        !            65: /* Prefix for a memory-operand X.  */
        !            66: #define PRINT_PTR(X, FILE)
        !            67: 
        !            68: /* Delimiters that surround base reg and index reg.  */
        !            69: #define ADDR_BEG(FILE) putc('(', (FILE))
        !            70: #define ADDR_END(FILE) putc(')', (FILE))
        !            71: 
        !            72: /* Print an index register (whose rtx is IREG).  */
        !            73: #define PRINT_IREG(FILE,IREG) \
        !            74:   do                                                           \
        !            75:   { fputs (",", (FILE)); PRINT_REG ((IREG), 0, (FILE)); }      \
        !            76:   while (0)
        !            77:   
        !            78: /* Print an index scale factor SCALE.  */
        !            79: #define PRINT_SCALE(FILE,SCALE) \
        !            80:   if ((SCALE) != 1) fprintf ((FILE), ",%d", (SCALE))
        !            81: 
        !            82: /* Print a base/index combination.
        !            83:    BREG is the base reg rtx, IREG is the index reg rtx,
        !            84:    and SCALE is the index scale factor (an integer).  */
        !            85: 
        !            86: #define PRINT_B_I_S(BREG,IREG,SCALE,FILE) \
        !            87:   { ADDR_BEG (FILE);                           \
        !            88:     if (BREG) PRINT_REG ((BREG), 0, (FILE));   \
        !            89:     if ((IREG) != 0)                           \
        !            90:       { PRINT_IREG ((FILE), (IREG));           \
        !            91:         PRINT_SCALE ((FILE), (SCALE)); }       \
        !            92:     ADDR_END (FILE); }
        !            93: 
        !            94: /* Define the syntax of pseudo-ops, labels and comments.  */
        !            95: 
        !            96: /* Assembler pseudos to introduce constants of various size.  */
        !            97: 
        !            98: #define ASM_BYTE "\t.byte "
        !            99: #define ASM_SHORT "\t.word "
        !           100: #define ASM_LONG "\t.long "
        !           101: #define ASM_DOUBLE "\t.double "
        !           102: 
        !           103: /* String containing the assembler's comment-starter.  */
        !           104: 
        !           105: #define COMMENT_BEGIN "/"
        !           106: 
        !           107: /* Output at beginning of assembler file.
        !           108:    ??? I am skeptical of this -- RMS.  */
        !           109: 
        !           110: #define ASM_FILE_START(FILE) \
        !           111:   fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);
        !           112: 
        !           113: /* This was suggested, but it shouldn't be right for DBX output. -- RMS
        !           114:    #define ASM_OUTPUT_SOURCE_FILENAME(FILE, NAME) */
        !           115: 
        !           116: /* Output to assembler file text saying following lines
        !           117:    may contain character constants, extra white space, comments, etc.  */
        !           118: 
        !           119: #define ASM_APP_ON "/APP\n"
        !           120: 
        !           121: /* Output to assembler file text saying following lines
        !           122:    no longer contain unusual constructs.  */
        !           123: 
        !           124: #define ASM_APP_OFF "/NO_APP\n"
        !           125: 
        !           126: /* Define the syntax of labels and symbol definitions/declarations.  */
        !           127: 
        !           128: /* This is how to output an assembler line
        !           129:    that says to advance the location counter by SIZE bytes.  */
        !           130: 
        !           131: #define ASM_OUTPUT_SKIP(FILE,SIZE)  \
        !           132:   fprintf (FILE, "\t.space %d\n", (SIZE))
        !           133: 
        !           134: /* Output before read-only data.  */
        !           135: 
        !           136: #define TEXT_SECTION_ASM_OP ".text"
        !           137: 
        !           138: /* Output before writable data.  */
        !           139: 
        !           140: #define DATA_SECTION_ASM_OP ".data"
        !           141: 
        !           142: /* Define the syntax of labels and symbol definitions/declarations.  */
        !           143: 
        !           144: /* This says how to output an assembler line
        !           145:    to define a global common symbol.  */
        !           146: 
        !           147: #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
        !           148: ( fputs (".comm ", (FILE)),                    \
        !           149:   assemble_name ((FILE), (NAME)),              \
        !           150:   fprintf ((FILE), ",%d\n", (SIZE)))
        !           151: 
        !           152: /* This says how to output an assembler line
        !           153:    to define a local common symbol.  */
        !           154: 
        !           155: #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
        !           156: ( fputs (".lcomm ", (FILE)),                   \
        !           157:   assemble_name ((FILE), (NAME)),              \
        !           158:   fprintf ((FILE), ",%d\n", (SIZE)))
        !           159: 
        !           160: /* This is how to output an assembler line
        !           161:    that says to advance the location counter
        !           162:    to a multiple of 2**LOG bytes.  */
        !           163: 
        !           164: #define ASM_OUTPUT_ALIGN(FILE,LOG)     \
        !           165:      if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", (LOG))
        !           166: 
        !           167: /* This is how to store into the string BUF
        !           168:    the symbol_ref name of an internal numbered label where
        !           169:    PREFIX is the class of label and NUM is the number within the class.
        !           170:    This is suitable for output with `assemble_name'.  */
        !           171: 
        !           172: #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \
        !           173:     sprintf ((BUF), "*%s%d", (PREFIX), (NUMBER))
        !           174: 
        !           175: /* This is how to output an internal numbered label where
        !           176:    PREFIX is the class of label and NUM is the number within the class.  */
        !           177: 
        !           178: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)     \
        !           179:   fprintf (FILE, "%s%d:\n", PREFIX, NUM)
        !           180: 
        !           181: /* This is how to output a reference to a user-level label named NAME.  */
        !           182: 
        !           183: #define ASM_OUTPUT_LABELREF(FILE,NAME) \
        !           184:   fprintf (FILE, "_%s", NAME)
        !           185: 
        !           186: /* Sequent has some changes in the format of DBX symbols.  */
        !           187: #define DBX_NO_XREFS 1
        !           188: 
        !           189: /* Don't split DBX symbols into continuations.  */
        !           190: #define DBX_CONTIN_LENGTH 0
        !           191:  
        !           192: /* This is how to output a command to make the user-level label named NAME
        !           193:    defined for reference from other files.  */
        !           194: 
        !           195: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
        !           196:   (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))
        !           197: 
        !           198: /* This is how to output an assembler line defining a `double' constant.  */
        !           199: 
        !           200: #undef ASM_OUTPUT_DOUBLE
        !           201: #define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
        !           202:   fprintf (FILE, "\t.double 0d%.20e\n", (VALUE))

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