1 /* Definitions of target machine for GNU compiler,
2 for m68k (including m68010) NetBSD platforms using the
4 Copyright (C) 2002 Free Software Foundation, Inc.
5 Contributed by Wasabi Systems. Inc.
7 This file is derived from <m68k/m68kv4.h>, <m68k/m68kelf.h>,
10 This file is part of GNU CC.
12 GNU CC is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
17 GNU CC is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GNU CC; see the file COPYING. If not, write to
24 the Free Software Foundation, 59 Temple Place - Suite 330,
25 Boston, MA 02111-1307, USA. */
27 #define TARGET_OS_CPP_BUILTINS() \
30 NETBSD_OS_CPP_BUILTINS_ELF(); \
31 builtin_define ("__m68k__"); \
32 builtin_define ("__SVR4_ABI__"); \
33 builtin_define ("__motorola__"); \
34 builtin_assert ("cpu=m68k"); \
35 builtin_assert ("machine=m68k"); \
39 /* Default target comes from config.gcc */
41 #define TARGET_DEFAULT TARGET_CPU_DEFAULT
44 /* Don't try using XFmode on the 68010. */
45 #undef LONG_DOUBLE_TYPE_SIZE
46 #define LONG_DOUBLE_TYPE_SIZE \
47 ((TARGET_68020 || TARGET_68040 || TARGET_68040_ONLY || \
48 TARGET_68060) ? 96 : 64)
51 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
53 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 96
57 { "cpp_cpu_default_spec", CPP_CPU_DEFAULT_SPEC }, \
58 { "cpp_cpu_spec", CPP_CPU_SPEC }, \
59 { "cpp_fpu_spec", CPP_FPU_SPEC }, \
60 { "asm_default_spec", ASM_DEFAULT_SPEC }, \
61 { "netbsd_cpp_spec", NETBSD_CPP_SPEC }, \
62 { "netbsd_entry_point", NETBSD_ENTRY_POINT },
65 #define CPP_CPU_SPEC \
66 "%{m68010:-D__mc68010__} \
67 %{m68020:-D__mc68020__} \
68 %{m68030:-D__mc68030__} \
69 %{m68040:-D__mc68040__} \
70 %(cpp_cpu_default_spec)"
74 #if TARGET_DEFAULT & MASK_68020
75 #define TARGET_VERSION fprintf (stderr, " (NetBSD/m68k ELF)");
76 #define CPP_CPU_DEFAULT_SPEC "%{!m680*:-D__mc68020__}"
77 #define ASM_DEFAULT_SPEC "%{!m680*:-m68020}"
79 #define TARGET_VERSION fprintf (stderr, " (NetBSD/68010 ELF)");
80 #define CPP_CPU_DEFAULT_SPEC "%{!m680*:-D__mc68010__}"
81 #define ASM_DEFAULT_SPEC "%{!m680*:-m68010}"
85 #if TARGET_DEFAULT & MASK_68881
86 #define CPP_FPU_SPEC "%{!msoft-float:-D__HAVE_68881__ -D__HAVE_FPU__}"
88 #define CPP_FPU_SPEC "%{m68881:-D__HAVE_68881__ -D__HAVE_FPU__}"
92 /* Provide a CPP_SPEC appropriate for NetBSD m68k targets. Currently we
93 deal with the GCC option '-posix', as well as an indication as to
94 whether or not use of the FPU is allowed. */
98 "%(netbsd_cpp_spec) %(cpp_cpu_spec) %(cpp_fpu_spec)"
101 /* Provide an ASM_SPEC appropriate for NetBSD m68k ELF targets. We pass
102 on some CPU options, as well as PIC code generation options. */
106 "%(asm_default_spec) \
107 %{m68010} %{m68020} %{m68030} %{m68040} %{m68060} \
108 %{fpic:-k} %{fPIC:-k -K}"
110 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
112 /* Provide a LINK_SPEC appropriate for a NetBSD/m68k ELF target. */
115 #define LINK_SPEC NETBSD_LINK_SPEC_ELF
117 #define NETBSD_ENTRY_POINT "_start"
119 /* Output assembler code to FILE to increment profiler label # LABELNO
120 for profiling a function only. */
122 #undef FUNCTION_PROFILER
123 #define FUNCTION_PROFILER(FILE, LABELNO) \
126 asm_fprintf (FILE, "\tlea (%LLP%d,%Rpc),%Ra1\n", (LABELNO)); \
128 fprintf (FILE, "\tbsr.l __mcount@PLTPC\n"); \
130 fprintf (FILE, "\tjbsr __mcount\n"); \
135 /* Make gcc agree with <machine/ansi.h> */
138 #define SIZE_TYPE "unsigned int"
141 #define PTRDIFF_TYPE "int"
145 Here is a bunch of stuff lifted from m68kelf.h. We don't use that
146 file directly, because it has a lot of baggage we don't want. */
148 #define MOTOROLA /* Use Motorola syntax */
149 #define USE_GAS /* But GAS wants jbsr instead of jsr */
152 /* The prefix for register names. Note that REGISTER_NAMES
153 is supposed to include this prefix. Also note that this is NOT an
154 fprintf format string, it is a literal string. */
156 #undef REGISTER_PREFIX
157 #define REGISTER_PREFIX "%"
160 /* The prefix for local (compiler generated) lables.
161 These labels will not appear in the symbol table. */
163 #undef LOCAL_LABEL_PREFIX
164 #define LOCAL_LABEL_PREFIX "."
167 /* The prefix to add to user-visible assembler symbols. */
169 #undef USER_LABEL_PREFIX
170 #define USER_LABEL_PREFIX ""
173 /* The prefix for immediate operands. */
175 #undef IMMEDIATE_PREFIX
176 #define IMMEDIATE_PREFIX "#"
179 #undef ASM_COMMENT_START
180 #define ASM_COMMENT_START "|"
183 /* How to refer to registers in assembler output.
184 This sequence is indexed by compiler's hard-register-number.
185 Motorola format uses different register names than defined in m68k.h.
186 We also take this chance to convert 'a6' to 'fp' */
188 #undef REGISTER_NAMES
190 #ifndef SUPPORT_SUN_FPA
192 #define REGISTER_NAMES \
193 {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
194 "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp", \
195 "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
197 #else /* SUPPORT_SUN_FPA */
199 #define REGISTER_NAMES \
200 {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
201 "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp", \
202 "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7", \
203 "%fpa0", "%fpa1", "%fpa2", "%fpa3", "%fpa4", "%fpa5", "%fpa6","%fpa7", \
204 "%fpa8", "%fpa9", "%fpa10","%fpa11","%fpa12","%fpa13","%fpa14","%fpa15", \
205 "%fpa16","%fpa17","%fpa18","%fpa19","%fpa20","%fpa21","%fpa22","%fpa23", \
206 "%fpa24","%fpa25","%fpa26","%fpa27","%fpa28","%fpa29","%fpa30","%fpa31" }
208 #endif /* ! SUPPORT_SUN_FPA */
211 /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
212 keep switch tables in the text section. */
214 #undef JUMP_TABLES_IN_TEXT_SECTION
215 #define JUMP_TABLES_IN_TEXT_SECTION 1
218 /* Use the default action for outputting the case label. */
219 #undef ASM_OUTPUT_CASE_LABEL
220 #define ASM_RETURN_CASE_JUMP \
224 if (ADDRESS_REG_P (operands[0])) \
225 return "jmp %%pc@(2,%0:l)"; \
227 return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
230 return "jmp %%pc@(2,%0:w)"; \
234 /* This is how to output an assembler line that says to advance the
235 location counter to a multiple of 2**LOG bytes. */
237 #undef ASM_OUTPUT_ALIGN
238 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
242 fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \
247 /* If defined, a C expression whose value is a string containing the
248 assembler operation to identify the following data as uninitialized global
251 #define BSS_SECTION_ASM_OP ".section\t.bss"
254 /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
255 separate, explicit argument. If you define this macro, it is used
256 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
257 handling the required alignment of the variable. The alignment is
258 specified as the number of bits.
260 Try to use function `asm_output_aligned_bss' defined in file
261 `varasm.c' when defining this macro. */
263 #undef ASM_OUTPUT_ALIGNED_BSS
264 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
265 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
268 #undef ASM_OUTPUT_COMMON
269 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
270 ( fputs (".comm ", (FILE)), \
271 assemble_name ((FILE), (NAME)), \
272 fprintf ((FILE), ",%u\n", (SIZE)))
274 #undef ASM_OUTPUT_LOCAL
275 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
276 ( fputs (".lcomm ", (FILE)), \
277 assemble_name ((FILE), (NAME)), \
278 fprintf ((FILE), ",%u\n", (SIZE)))
282 This is the end of the chunk lifted from m68kelf.h */
286 The following chunk is more or less lifted from m68kv4.h.
287 We'd like to just #include that file, but it has not yet
288 been converted to the new include style.
290 Should there be a m68kv4-abi.h ?? */
293 /* Register in which address to store a structure value is passed to a
294 function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */
296 #undef STRUCT_VALUE_REGNUM
297 #define STRUCT_VALUE_REGNUM 8
300 /* Register in which static-chain is passed to a function. The
301 default isn m68k.h is a0, but that is already the struct value
302 regnum. Make it a1 instead. */
304 #undef STATIC_CHAIN_REGNUM
305 #define STATIC_CHAIN_REGNUM 9
308 /* Now to renumber registers for dbx and gdb.
309 We use the Sun-3 convention, which is:
310 floating point registers have numbers 18 to 25, not
311 16 to 23 as they do in the compiler. */
313 #undef DBX_REGISTER_NUMBER
314 #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2)
317 /* 1 if N is a possible register number for a function value. For
318 m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral,
319 pointer, or floating types, respectively. Reject fp0 if not using
320 a 68881 coprocessor. */
322 #undef FUNCTION_VALUE_REGNO_P
323 #define FUNCTION_VALUE_REGNO_P(N) \
324 ((N) == 0 || (N) == 8 || (TARGET_68881 && (N) == 16))
327 /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
328 more than one register. */
330 #undef NEEDS_UNTYPED_CALL
331 #define NEEDS_UNTYPED_CALL 1
334 /* Define how to generate (in the callee) the output value of a
335 function and how to find (in the caller) the value returned by a
336 function. VALTYPE is the data type of the value (as a tree). If
337 the precise function being called is known, FUNC is its
338 FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the
339 result in d0, a0, or fp0 as appropriate. */
341 #undef FUNCTION_VALUE
342 #define FUNCTION_VALUE(VALTYPE, FUNC) \
343 (TREE_CODE (VALTYPE) == REAL_TYPE && TARGET_68881 \
344 ? gen_rtx_REG (TYPE_MODE (VALTYPE), 16) \
345 : (POINTER_TYPE_P (VALTYPE) \
346 ? gen_rtx_REG (TYPE_MODE (VALTYPE), 8) \
347 : gen_rtx_REG (TYPE_MODE (VALTYPE), 0)))
350 /* For compatibility with the large body of existing code which does
351 not always properly declare external functions returning pointer
352 types, the m68k/SVR4 convention is to copy the value returned for
353 pointer functions from a0 to d0 in the function epilogue, so that
354 callers that have neglected to properly declare the callee can
355 still find the correct return value. */
357 extern int current_function_returns_pointer;
358 #define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) \
361 if (current_function_returns_pointer \
362 && ! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode)) \
363 asm_fprintf (FILE, "\tmove.l %Ra0,%Rd0\n"); \
368 /* Define how to find the value returned by a library function
369 assuming the value has mode MODE.
370 For m68k/SVR4 look for integer values in d0, pointer values in d0
371 (returned in both d0 and a0), and floating values in fp0. */
374 #define LIBCALL_VALUE(MODE) \
375 ((((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode) \
377 ? gen_rtx_REG (MODE, 16) \
378 : gen_rtx_REG (MODE, 0))
381 /* Boundary (in *bits*) on which stack pointer should be aligned.
382 The m68k/SVR4 convention is to keep the stack pointer longword aligned. */
384 #undef STACK_BOUNDARY
385 #define STACK_BOUNDARY 32
388 /* Alignment of field after `int : 0' in a structure.
389 For m68k/SVR4, this is the next longword boundary. */
391 #undef EMPTY_FIELD_BOUNDARY
392 #define EMPTY_FIELD_BOUNDARY 32
395 /* No data type wants to be aligned rounder than this.
396 For m68k/SVR4, some types (doubles for example) are aligned on 8 byte
399 #undef BIGGEST_ALIGNMENT
400 #define BIGGEST_ALIGNMENT 64
403 /* In m68k svr4, a symbol_ref rtx can be a valid PIC operand if it is
404 an operand of a function call. */
406 #undef LEGITIMATE_PIC_OPERAND_P
407 #define LEGITIMATE_PIC_OPERAND_P(X) \
408 ((! symbolic_operand (X, VOIDmode) \
409 && ! (GET_CODE (X) == CONST_DOUBLE && mem_for_const_double (X) \
410 && GET_CODE (mem_for_const_double (X)) == MEM \
411 && symbolic_operand (XEXP (mem_for_const_double (X), 0), \
413 || (GET_CODE (X) == SYMBOL_REF && SYMBOL_REF_FLAG (X)) \
414 || PCREL_GENERAL_OPERAND_OK)
417 /* For m68k SVR4, structures are returned using the reentrant
420 #undef PCC_STATIC_STRUCT_RETURN
423 /* The svr4 ABI for the m68k says that records and unions are returned
426 #undef DEFAULT_PCC_STRUCT_RETURN
427 #define DEFAULT_PCC_STRUCT_RETURN 1
429 /* Output assembler code for a block containing the constant parts
430 of a trampoline, leaving space for the variable parts. */
432 /* On m68k svr4, the trampoline is different from the generic version
433 in that we use a1 as the static call chain. */
435 #undef TRAMPOLINE_TEMPLATE
436 #define TRAMPOLINE_TEMPLATE(FILE) \
438 assemble_aligned_integer (2, GEN_INT (0x227a)); \
439 assemble_aligned_integer (2, GEN_INT (8)); \
440 assemble_aligned_integer (2, GEN_INT (0x2f3a)); \
441 assemble_aligned_integer (2, GEN_INT (8)); \
442 assemble_aligned_integer (2, GEN_INT (0x4e75)); \
443 assemble_aligned_integer (4, const0_rtx); \
444 assemble_aligned_integer (4, const0_rtx); \
447 /* Redefine since we are using a different trampoline */
448 #undef TRAMPOLINE_SIZE
449 #define TRAMPOLINE_SIZE 18
451 /* Emit RTL insns to initialize the variable parts of a trampoline.
452 FNADDR is an RTX for the address of the function's pure code.
453 CXT is an RTX for the static chain value for the function. */
455 #undef INITIALIZE_TRAMPOLINE
456 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
458 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 10)), CXT); \
459 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 14)), FNADDR); \
464 This is the end of the chunk lifted from m68kv4.h */