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Annotation of gcc/config/ns32k/netbsd.h, revision 1.1

1.1     ! root        1: /* Configuration for a ns32532 running NetBSD as the target machine.
        !             2:    Copyright (C) 1988, 1994 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 2, 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:        $Id: netbsd.h,v 1.2 1994/08/08 23:57:00 kenner Exp $
        !            21: */
        !            22: 
        !            23: #include <machine/ansi.h>
        !            24: #include "ns32k/ns32k.h"
        !            25: 
        !            26: /* Compile for the floating point unit & 32532 by default;
        !            27:    Don't assume SB is zero;
        !            28:    Don't use bitfield instructions; */
        !            29: 
        !            30: #define TARGET_DEFAULT 121
        !            31: 
        !            32: /* 32-bit alignment for efficiency */
        !            33: 
        !            34: #undef POINTER_BOUNDARY
        !            35: #define POINTER_BOUNDARY 32
        !            36: 
        !            37: /* 32-bit alignment for efficiency */
        !            38: 
        !            39: #undef FUNCTION_BOUNDARY
        !            40: #define FUNCTION_BOUNDARY 32
        !            41: 
        !            42: /* 32532 spec says it can handle any alignment.  Rumor from tm-ns32k.h
        !            43:    tells this might not be actually true (but it's for 32032, perhaps
        !            44:    National has fixed the bug for 32532).  You might have to change this
        !            45:    if the bug still exists. */
        !            46: 
        !            47: #undef STRICT_ALIGNMENT
        !            48: #define STRICT_ALIGNMENT 0
        !            49: 
        !            50: /* Use pc relative addressing whenever possible,
        !            51:    it's more efficient than absolute (ns32k.c)
        !            52:    You have to fix a bug in gas 1.38.1 to make this work with gas,
        !            53:    patch available from [email protected].
        !            54:    (NetBSD's gas version has this patch already applied) */
        !            55: 
        !            56: #define PC_RELATIVE
        !            57: 
        !            58: /* Operand of bsr or jsr should be just the address.  */
        !            59: 
        !            60: #define CALL_MEMREF_IMPLICIT
        !            61: 
        !            62: /* movd insns may have floating point constant operands.  */
        !            63: 
        !            64: #define MOVD_FLOAT_OK
        !            65: 
        !            66: /* Names to predefine in the preprocessor for this target machine.  */
        !            67: 
        !            68: #undef CPP_PREDEFINES
        !            69: #define CPP_PREDEFINES "-Dns32k -Dns32000 -Dns32532 -D__NetBSD__ -Dunix -Dpc532"
        !            70: 
        !            71: /* Specify -k to assembler for pic generation. PIC needs -K too. */
        !            72: 
        !            73: #define ASM_SPEC "%{fpic:-k} %{fPIC:-k -K}"
        !            74: 
        !            75: #define LINK_SPEC      \
        !            76:  "%{!nostdlib:%{!r*:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} %{assert*}"
        !            77: 
        !            78: #define STARTFILE_SPEC  \
        !            79:   "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"
        !            80: 
        !            81: /* No more libg.a; no libraries if making shared object */
        !            82: 
        !            83: #define LIB_SPEC "%{!shared:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"
        !            84: 
        !            85: /* Make gcc agree with <machine/ansi.h> */
        !            86: 
        !            87: #undef SIZE_TYPE
        !            88: #define SIZE_TYPE "unsigned int"
        !            89: 
        !            90: #undef PTRDIFF_TYPE
        !            91: #define PTRDIFF_TYPE "int"
        !            92: 
        !            93: #undef WCHAR_TYPE
        !            94: #define WCHAR_TYPE     "int"
        !            95: 
        !            96: #define WCHAR_UNSIGNED 0
        !            97: 
        !            98: #undef WCHAR_TYPE_SIZE
        !            99: #define WCHAR_TYPE_SIZE        32
        !           100: 
        !           101: /* This is BSD, so it wants DBX format.  */
        !           102: 
        !           103: #define DBX_DEBUGGING_INFO
        !           104: 
        !           105: /* Do not break .stabs pseudos into continuations.  */
        !           106: 
        !           107: #define DBX_CONTIN_LENGTH 0
        !           108: 
        !           109: /* This is the char to use for continuation (in case we need to turn
        !           110:    continuation back on).  */
        !           111: 
        !           112: #define DBX_CONTIN_CHAR '?'
        !           113: 
        !           114: /* Don't use the `xsfoo;' construct in DBX output; this system
        !           115:    doesn't support it.  */
        !           116: 
        !           117: #define DBX_NO_XREFS
        !           118: 
        !           119: /* Don't default to pcc-struct-return, because gcc is the only compiler, and
        !           120:    we want to retain compatibility with older gcc versions.  */
        !           121: 
        !           122: #undef PCC_STATIC_STRUCT_RETURN
        !           123: #define DEFAULT_PCC_STRUCT_RETURN 0
        !           124: 
        !           125: /*
        !           126:  * Some imports from svr4.h in support of shared libraries.
        !           127:  */
        !           128: 
        !           129: /* Define the strings used for the special svr4 .type and .size directives.
        !           130:    These strings generally do not vary from one system running svr4 to
        !           131:    another, but if a given system (e.g. m88k running svr) needs to use
        !           132:    different pseudo-op names for these, they may be overridden in the
        !           133:    file which includes this one.  */
        !           134: 
        !           135: #define TYPE_ASM_OP    ".type"
        !           136: #define SIZE_ASM_OP    ".size"
        !           137: #define WEAK_ASM_OP    ".weak"
        !           138: 
        !           139: /* The following macro defines the format used to output the second
        !           140:    operand of the .type assembler directive.  Different svr4 assemblers
        !           141:    expect various different forms for this operand.  The one given here
        !           142:    is just a default.  You may need to override it in your machine-
        !           143:    specific tm.h file (depending upon the particulars of your assembler).  */
        !           144: 
        !           145: #define TYPE_OPERAND_FMT       "@%s"
        !           146: 
        !           147: /* Write the extra assembler code needed to declare a function's result.
        !           148:    Most svr4 assemblers don't require any special declaration of the
        !           149:    result value, but there are exceptions.  */
        !           150: 
        !           151: #ifndef ASM_DECLARE_RESULT
        !           152: #define ASM_DECLARE_RESULT(FILE, RESULT)
        !           153: #endif
        !           154: 
        !           155: /* These macros generate the special .type and .size directives which
        !           156:    are used to set the corresponding fields of the linker symbol table
        !           157:    entries in an ELF object file under SVR4.  These macros also output
        !           158:    the starting labels for the relevant functions/objects.  */
        !           159: 
        !           160: /* Write the extra assembler code needed to declare a function properly.
        !           161:    Some svr4 assemblers need to also have something extra said about the
        !           162:    function's return value.  We allow for that here.  */
        !           163: 
        !           164: #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                    \
        !           165:   do {                                                                 \
        !           166:     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);                            \
        !           167:     assemble_name (FILE, NAME);                                                \
        !           168:     putc (',', FILE);                                                  \
        !           169:     fprintf (FILE, TYPE_OPERAND_FMT, "function");                      \
        !           170:     putc ('\n', FILE);                                                 \
        !           171:     ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                     \
        !           172:     ASM_OUTPUT_LABEL(FILE, NAME);                                      \
        !           173:   } while (0)
        !           174: 
        !           175: /* Write the extra assembler code needed to declare an object properly.  */
        !           176: 
        !           177: #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                      \
        !           178:   do {                                                                 \
        !           179:     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);                            \
        !           180:     assemble_name (FILE, NAME);                                                \
        !           181:     putc (',', FILE);                                                  \
        !           182:     fprintf (FILE, TYPE_OPERAND_FMT, "object");                                \
        !           183:     putc ('\n', FILE);                                                 \
        !           184:     size_directive_output = 0;                                         \
        !           185:     if (!flag_inhibit_size_directive && DECL_SIZE (DECL))              \
        !           186:       {                                                                        \
        !           187:         size_directive_output = 1;                                     \
        !           188:        fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
        !           189:        assemble_name (FILE, NAME);                                     \
        !           190:        fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (decl))); \
        !           191:       }                                                                        \
        !           192:     ASM_OUTPUT_LABEL(FILE, NAME);                                      \
        !           193:   } while (0)
        !           194: 
        !           195: /* Output the size directive for a decl in rest_of_decl_compilation
        !           196:    in the case where we did not do so before the initializer.
        !           197:    Once we find the error_mark_node, we know that the value of
        !           198:    size_directive_output was set
        !           199:    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
        !           200: 
        !           201: #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)        \
        !           202: do {                                                                    \
        !           203:      char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);                  \
        !           204:      if (!flag_inhibit_size_directive                                   \
        !           205:         && !size_directive_output                                       \
        !           206:          && DECL_SIZE (DECL)                                            \
        !           207:          && ! AT_END && TOP_LEVEL                                       \
        !           208:         && DECL_INITIAL (DECL) == error_mark_node)                      \
        !           209:        {                                                                \
        !           210:         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
        !           211:         assemble_name (FILE, name);                                     \
        !           212:         fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL))); \
        !           213:        }                                                                \
        !           214:    } while (0)
        !           215: 
        !           216: /* This is how to declare the size of a function.  */
        !           217: 
        !           218: #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                   \
        !           219:   do {                                                                 \
        !           220:     if (!flag_inhibit_size_directive)                                  \
        !           221:       {                                                                        \
        !           222:         char label[256];                                               \
        !           223:        static int labelno;                                             \
        !           224:        labelno++;                                                      \
        !           225:        ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);            \
        !           226:        ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);               \
        !           227:        fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
        !           228:        assemble_name (FILE, (FNAME));                                  \
        !           229:         fprintf (FILE, ",");                                           \
        !           230:        assemble_name (FILE, label);                                    \
        !           231:         fprintf (FILE, "-");                                           \
        !           232:        assemble_name (FILE, (FNAME));                                  \
        !           233:        putc ('\n', FILE);                                              \
        !           234:       }                                                                        \
        !           235:   } while (0)

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