1/* Definitions for Motorola 68k running Haiku 2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2007 3 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GCC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to 19the Free Software Foundation, 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22/* Default target comes from config.gcc. */ 23 24#undef TARGET_DEFAULT 25#ifdef TARGET_CPU_DEFAULT 26#define TARGET_DEFAULT TARGET_CPU_DEFAULT 27#else 28#define TARGET_DEFAULT (MASK_BITFIELD|MASK_68881|MASK_68020) 29#endif 30 31/* for 68k machines this only needs to be TRUE for the 68000 */ 32 33#undef STRICT_ALIGNMENT 34#define STRICT_ALIGNMENT 0 35 36/* Here are four prefixes that are used by asm_fprintf to 37 facilitate customization for alternate assembler syntaxes. 38 Machines with no likelihood of an alternate syntax need not 39 define these and need not use asm_fprintf. */ 40 41/* The prefix for register names. Note that REGISTER_NAMES 42 is supposed to include this prefix. Also note that this is NOT an 43 fprintf format string, it is a literal string */ 44 45#undef REGISTER_PREFIX 46#define REGISTER_PREFIX "%" 47 48/* The prefix for local (compiler generated) labels. 49 These labels will not appear in the symbol table. */ 50 51#undef LOCAL_LABEL_PREFIX 52#define LOCAL_LABEL_PREFIX "." 53 54/* The prefix to add to user-visible assembler symbols. */ 55 56#undef USER_LABEL_PREFIX 57#define USER_LABEL_PREFIX "" 58 59#undef ASM_COMMENT_START 60#define ASM_COMMENT_START "|" 61 62/* Target OS builtins. */ 63 64#undef TARGET_OS_CPP_BUILTINS 65#define TARGET_OS_CPP_BUILTINS() \ 66 do \ 67 { \ 68 builtin_define ("__HAIKU__"); \ 69 builtin_define ("__M68K__"); \ 70 builtin_define_std ("mc68000"); \ 71 builtin_define_std ("mc68020"); \ 72 builtin_define ("__stdcall=__attribute__((__stdcall__))"); \ 73 builtin_define ("__cdecl=__attribute__((__cdecl__))"); \ 74 builtin_define ("__STDC_ISO_10646__=201103L"); \ 75 builtin_assert ("system=haiku"); \ 76 } \ 77 while (0) 78 79#define TARGET_OBJFMT_CPP_BUILTINS() \ 80 do \ 81 { \ 82 builtin_define ("__ELF__"); \ 83 } \ 84 while (0) 85 86#undef CPP_SPEC 87#if TARGET_DEFAULT & MASK_68881 88#define CPP_SPEC \ 89 "%{fPIC|fpic|fPIE|fpie:-D__PIC__ -D__pic__} %{!msoft-float:-D__HAVE_68881__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" 90#else 91#define CPP_SPEC \ 92 "%{fPIC|fpic|fPIE|fpie:-D__PIC__ -D__pic__} %{m68881:-D__HAVE_68881__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" 93#endif 94 95/* We override the ASM_SPEC from svr4.h because we must pass -m68040 down 96 to the assembler. */ 97#undef ASM_SPEC 98#define ASM_SPEC \ 99 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \ 100%{m68040} %{m68060:-m68040}" 101 102/* Provide a LINK_SPEC appropriate for Haiku. Here we provide support 103 for the special GCC options -static and -shared, which allow us to 104 link things in one of these three modes by applying the appropriate 105 combinations of options at link-time. */ 106 107/* If ELF is the default format, we should not use /lib/elf. */ 108 109#undef LINK_SPEC 110/*#define LINK_SPEC "%{!o*:-o %b} -m elf_m68k_haiku -shared -no-undefined %{nostart:-e 0}"*/ 111#define LINK_SPEC "%{!o*:-o %b} -m m68kelf %{!r:-shared} %{nostart:-e 0} %{shared:-e 0} %{!shared: %{!nostart: -no-undefined}}" 112 113/* XXX: not sure for the rest there... */ 114 115/* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to 116 keep switch tables in the text section. */ 117 118#define JUMP_TABLES_IN_TEXT_SECTION 1 119 120/* This is how to output an assembler line that says to advance the 121 location counter to a multiple of 2**LOG bytes. */ 122 123/* Use the default action for outputting the case label. */ 124#undef ASM_OUTPUT_CASE_LABEL 125#define ASM_RETURN_CASE_JUMP \ 126 do { \ 127 if (TARGET_COLDFIRE) \ 128 { \ 129 if (ADDRESS_REG_P (operands[0])) \ 130 return "jmp %%pc@(2,%0:l)"; \ 131 else \ 132 return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \ 133 } \ 134 else \ 135 return "jmp %%pc@(2,%0:w)"; \ 136 } while (0) 137 138#undef ASM_OUTPUT_ALIGN 139#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 140 if ((LOG) > 0) \ 141 fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); 142 143/* If defined, a C expression whose value is a string containing the 144 assembler operation to identify the following data as uninitialized global 145 data. */ 146 147#define BSS_SECTION_ASM_OP "\t.section\t.bss" 148 149/* A C statement (sans semicolon) to output to the stdio stream 150 FILE the assembler definition of uninitialized global DECL named 151 NAME whose size is SIZE bytes and alignment is ALIGN bytes. 152 Try to use asm_output_aligned_bss to implement this macro. */ 153 154#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 155 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 156 157/* Output assembler code to FILE to increment profiler label # LABELNO 158 for profiling a function entry. */ 159 160#undef FUNCTION_PROFILER 161#define FUNCTION_PROFILER(FILE, LABELNO) \ 162{ \ 163 asm_fprintf (FILE, "\tlea (%LLP%d,%Rpc),%Ra1\n", (LABELNO)); \ 164 if (flag_pic) \ 165 fprintf (FILE, "\tbsr.l _mcount@PLTPC\n"); \ 166 else \ 167 fprintf (FILE, "\tjbsr _mcount\n"); \ 168} 169 170/* How to renumber registers for dbx and gdb. 171 On the Sun-3, the floating point registers have numbers 172 18 to 25, not 16 to 23 as they do in the compiler. */ 173 174#define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2) 175 176/* Do not break .stabs pseudos into continuations. */ 177 178#define DBX_CONTIN_LENGTH 0 179 180/* 1 if N is a possible register number for a function value. For 181 m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral, 182 pointer, or floating types, respectively. Reject fp0 if not using 183 a 68881 coprocessor. */ 184 185#undef FUNCTION_VALUE_REGNO_P 186#define FUNCTION_VALUE_REGNO_P(N) \ 187 ((N) == 0 || (N) == 8 || (TARGET_68881 && (N) == 16)) 188 189/* Define this to be true when FUNCTION_VALUE_REGNO_P is true for 190 more than one register. */ 191 192#undef NEEDS_UNTYPED_CALL 193#define NEEDS_UNTYPED_CALL 1 194 195/* Define how to generate (in the callee) the output value of a 196 function and how to find (in the caller) the value returned by a 197 function. VALTYPE is the data type of the value (as a tree). If 198 the precise function being called is known, FUNC is its 199 FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the 200 result in d0, a0, or fp0 as appropriate. */ 201 202#undef FUNCTION_VALUE 203#define FUNCTION_VALUE(VALTYPE, FUNC) \ 204 (TREE_CODE (VALTYPE) == REAL_TYPE && TARGET_68881 \ 205 ? gen_rtx_REG (TYPE_MODE (VALTYPE), 16) \ 206 : (POINTER_TYPE_P (VALTYPE) \ 207 ? gen_rtx_REG (TYPE_MODE (VALTYPE), 8) \ 208 : gen_rtx_REG (TYPE_MODE (VALTYPE), 0))) 209 210/* For compatibility with the large body of existing code which does 211 not always properly declare external functions returning pointer 212 types, the m68k/SVR4 convention is to copy the value returned for 213 pointer functions from a0 to d0 in the function epilogue, so that 214 callers that have neglected to properly declare the callee can 215 still find the correct return value. */ 216 217#define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) \ 218do { \ 219 if (current_function_returns_pointer \ 220 && ! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode)) \ 221 asm_fprintf (FILE, "\tmove.l %Ra0,%Rd0\n"); \ 222} while (0); 223 224/* Define how to find the value returned by a library function 225 assuming the value has mode MODE. 226 For m68k/SVR4 look for integer values in d0, pointer values in d0 227 (returned in both d0 and a0), and floating values in fp0. */ 228 229#undef LIBCALL_VALUE 230#define LIBCALL_VALUE(MODE) \ 231 ((((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode) \ 232 && TARGET_68881) \ 233 ? gen_rtx_REG ((MODE), 16) \ 234 : gen_rtx_REG ((MODE), 0)) 235 236/* For m68k SVR4, structures are returned using the reentrant 237 technique. */ 238#undef PCC_STATIC_STRUCT_RETURN 239#define DEFAULT_PCC_STRUCT_RETURN 0 240 241/* Finalize the trampoline by flushing the insn cache. */ 242 243#undef FINALIZE_TRAMPOLINE 244#define FINALIZE_TRAMPOLINE(TRAMP) \ 245 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"), \ 246 LCT_NORMAL, VOIDmode, 2, TRAMP, Pmode, \ 247 plus_constant (Pmode, TRAMP, TRAMPOLINE_SIZE), \ 248 Pmode); 249 250/* Clear the instruction cache from `beg' to `end'. This makes an 251 inline system call to SYS_cacheflush. The arguments are as 252 follows: 253 254 cacheflush (addr, scope, cache, len) 255 256 addr - the start address for the flush 257 scope - the scope of the flush (see the cpush insn) 258 cache - which cache to flush (see the cpush insn) 259 len - a factor relating to the number of flushes to perform: 260 len/16 lines, or len/4096 pages. */ 261 262#define CLEAR_INSN_CACHE(BEG, END) \ 263{ \ 264extern void clear_caches(void *address, int length, unsigned long flags); \ 265 void *ptr = BEG; \ 266 int len = (END - BEG + 32); \ 267 clear_caches(ptr, len, 0x0005); \ 268} 269