gcc/config/i860/paragon.h

   1 /* Target definitions for GNU compiler for Intel 80860 running OSF/1AD
   2    Copyright (C) 1991, 1996, 1999 Free Software Foundation, Inc.
   3    Based upon original work of Ron Guilmette (rfg@monkeys.com).
   4    Contributed by Andy Pfiffer (andyp@ssd.intel.com).
   5    Partially inspired by
   6         Pete Beckman of Indiana University (beckman@cs.indiana.edu)
   7         Harry Dolan of Intel Corporation (dolan@ssd.intel.com)
   8
   9 This file is part of GNU CC.
  10
  11 GNU CC is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 2, or (at your option)
  14 any later version.
  15
  16 GNU CC is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GNU CC; see the file COPYING.  If not, write to
  23 the Free Software Foundation, 59 Temple Place - Suite 330,
  24 Boston, MA 02111-1307, USA.  */
  25
  26 #undef TARGET_SWITCHES
  27 #define TARGET_SWITCHES  \
  28   { {"xp", 1, "Generate code which uses the FPU"},              \
  29     {"noxp", -1, "Do not generate code which uses the FPU"},    \
  30     {"xr", -1, "Do not generate code which uses the FPU"},      \
  31     {"noieee", -1, "Do not generate code which uses the FPU"},  \
  32     {"nx", 2, NULL},                  \
  33     { "", TARGET_DEFAULT, NULL}}
  34
  35 #undef TARGET_DEFAULT
  36 #define TARGET_DEFAULT 1
  37
  38 /* The Intel as860 assembler does not understand .stabs, must use COFF */
  39 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
  40
  41 #undef TARGET_VERSION
  42 #define TARGET_VERSION fprintf (stderr, " (i860 OSF/1AD)");
  43
  44 #undef CPP_PREDEFINES
  45 #define CPP_PREDEFINES  "-Di860 -D__i860 -D__i860__ -D__PARAGON__ -D__OSF1__ -D_COFF -Dunix -DMACH -DCMU"
  46
  47 #define CPP_SPEC "%{mnx:-D__NODE}"
  48
  49 /* autoinit.o autolaunches NX applications */
  50 #define STARTFILE_SPEC "crt0.o%s %{mnx:-yoptions/autoinit.o%s}"
  51
  52 /* libic.a is the PGI intrinsic library */
  53 /* libpm.o and guard.o are for the performance monitoring modules (ignored) */
  54 /* /usr/lib/noieee contains non-IEEE compliant (but faster) math routines */
  55 #if     HAVE_DASH_G
  56 #define LIB_SPEC \
  57 "%{mnoieee:-L/usr/lib/noieee} %{mnx:-lnx} %{g*:-lg} -lc -lmach -lc -lic"
  58 #else   /* HAVE_DASH_G */
  59 /* can't use -g for -lg; libg.a doesn't have a symbol table and ld complains */
  60 #define LIB_SPEC "%{mnoieee:-L/usr/lib/noieee} %{mnx:-lnx} -lc -lmach -lc -lic"
  61 #endif  /* HAVE_DASH_G */
  62
  63 /* Get rid of definition from svr3.h.  */
  64 #undef SIZE_TYPE
  65
  66 #undef  I860_REG_PREFIX
  67
  68 #undef  ASM_COMMENT_START
  69 #define ASM_COMMENT_START "//"
  70
  71 #undef TYPE_OPERAND_FMT
  72 #define TYPE_OPERAND_FMT      "\"%s\""
  73
  74 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
  75
  76 #undef ASCII_DATA_ASM_OP
  77 #define ASCII_DATA_ASM_OP       ".byte"
  78
  79 /*
  80  *      the assembler we're using doesn't grok .ident...
  81  */
  82 #undef  ASM_OUTPUT_IDENT
  83 #define ASM_OUTPUT_IDENT(FILE, NAME) \
  84   fprintf (FILE, "//\t.ident \"%s\"\n", NAME);
  85
  86 /*
  87  *      the assembler doesn't grok .double INF and the like
  88  *      but does understand .long with hex numbers, so special
  89  *      case the "symbolic" IEEE numbers.
  90  */
  91 #undef ASM_OUTPUT_DOUBLE
  92 #define ASM_OUTPUT_DOUBLE(FILE,VALUE)                           \
  93   {                                                             \
  94     if (REAL_VALUE_ISINF (VALUE)                                \
  95         || REAL_VALUE_ISNAN (VALUE)                             \
  96         || REAL_VALUE_MINUS_ZERO (VALUE))                       \
  97       {                                                         \
  98         long t[2];                                              \
  99         REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t);               \
 100         fprintf (FILE, "\t.long 0x%lx\n\t.long 0x%lx\n", t[0], t[1]); \
 101       }                                                         \
 102     else                                                        \
 103       fprintf (FILE, "\t.double %.20e\n", VALUE);               \
 104   }
 105
 106 #undef ASM_OUTPUT_FLOAT
 107 #define ASM_OUTPUT_FLOAT(FILE,VALUE)                            \
 108   {                                                             \
 109     if (REAL_VALUE_ISINF (VALUE)                                \
 110         || REAL_VALUE_ISNAN (VALUE)                             \
 111         || REAL_VALUE_MINUS_ZERO (VALUE))                       \
 112       {                                                         \
 113         long t;                                                 \
 114         REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t);               \
 115         fprintf (FILE, "\t.long 0x%lx\n", t);                   \
 116       }                                                         \
 117     else                                                        \
 118       fprintf (FILE, "\t.float %.12e\n", VALUE);                \
 119   }
 120
 121 #undef  ASM_OUTPUT_ASCII
 122 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                     \
 123   do                                                            \
 124     {                                                           \
 125       register const unsigned char *str = (const unsigned char *) (STR); \
 126       register const unsigned char *limit = str + (LENGTH);     \
 127       register unsigned bytes_in_chunk = 0;                     \
 128       for (; str < limit; str++)                                \
 129         {                                                       \
 130           register unsigned ch = *str;                          \
 131           if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127)  \
 132             {                                                   \
 133               if (bytes_in_chunk > 0)                           \
 134                 {                                               \
 135                   fprintf ((FILE), "\"\n");                     \
 136                   bytes_in_chunk = 0;                           \
 137                 }                                               \
 138               fprintf ((FILE), "\t%s\t%d\n", ASM_BYTE_OP, ch);  \
 139             }                                                   \
 140           else                                                  \
 141             {                                                   \
 142               if (bytes_in_chunk >= 60)                         \
 143                 {                                               \
 144                   fprintf ((FILE), "\"\n");                     \
 145                   bytes_in_chunk = 0;                           \
 146                 }                                               \
 147               if (bytes_in_chunk == 0)                          \
 148                 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP);\
 149               putc (ch, (FILE));                                \
 150               bytes_in_chunk++;                                 \
 151             }                                                   \
 152         }                                                       \
 153       if (bytes_in_chunk > 0)                                   \
 154         fprintf ((FILE), "\"\n");                               \
 155     }                                                           \
 156   while (0)
 157
 158
 159 /* This says how to output an assembler line
 160    to define a local common symbol.  */
 161
 162 #undef ASM_OUTPUT_LOCAL
 163 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
 164 ( fputs (".lcomm ", (FILE)),                    \
 165   assemble_name ((FILE), (NAME)),               \
 166   fprintf ((FILE), ",%u\n", (ROUNDED)))
 167
 168 /*
 169  *      not defining ASM_STABS_OP yields .stabs in the .s file
 170  *      when using g++ -- so, I'll define it.
 171  */
 172 #define ASM_STABS_OP    "//.stabs"
 173
 174 /* Define this macro if an instruction to load a value narrower
 175    than a word from memory into a register also zero-extends the
 176    value to the whole  register.  */
 177 /*#define BYTE_LOADS_ZERO_EXTEND*/
 178
 179 /* Define this macro as a C expression which is nonzero if
 180    accessing less than a word of memory (i.e. a `char' or a
 181    `short') is no faster than accessing a word of memory, i.e., if
 182    such access require more than one instruction or if there is no
 183    difference in cost between byte and (aligned) word loads.
 184
 185    On RISC machines, it tends to generate better code to define
 186    this as 1, since it avoids making a QI or HI mode register.  */
 187 /*
 188 #undef SLOW_BYTE_ACCESS
 189 #define SLOW_BYTE_ACCESS 1
 190 */
 191
 192 /* Define if shifts truncate the shift count
 193    which implies one can omit a sign-extension or zero-extension
 194    of a shift count. */
 195 #define SHIFT_COUNT_TRUNCATED 1
 196
 197
 198 #define FASTEST_ALIGNMENT 32
 199
 200 /* Make strings word-aligned so strcpy from constants will be faster.  */
 201 #define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
 202   (TREE_CODE (EXP) == STRING_CST        \
 203    && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
 204
 205 /* Make arrays of chars word-aligned for the same reasons.  */
 206 #define DATA_ALIGNMENT(TYPE, ALIGN)             \
 207   (TREE_CODE (TYPE) == ARRAY_TYPE               \
 208    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode    \
 209    && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
 210
 211 /*
 212  *      disable a few things picked up from svr3.h
 213  */
 214 #undef INIT_SECTION_ASM_OP
 215 #undef FINI_SECTION_ASM_OP
 216 #undef CONST_SECTION_ASM_OP
 217 #undef CTORS_SECTION_ASM_OP
 218 #undef DTORS_SECTION_ASM_OP
 219 #undef DO_GLOBAL_CTORS_BODY
 220 #undef ASM_OUTPUT_DESTRUCTOR
 221 #undef SELECT_SECTION
 222 #undef SELECT_RTX_SECTION
 223 #undef READONLY_DATA_SECTION
 224
 225 #define BSS_SECTION_ASM_OP      ".bss"          /* XXX */
 226 #undef EXTRA_SECTIONS
 227 #undef EXTRA_SECTION_FUNCTIONS