+++ /dev/null
-/* Target definitions for GNU compiler for mc680x0 running System V.4
- Copyright (C) 1991, 1993, 1994, 1995, 1996, 1998, 1999, 2000
- Free Software Foundation, Inc.
- Contributed by Ron Guilmette (rfg@monkeys.com) and
- Fred Fish (fnf@cygnus.com).
-
-This file is part of GNU CC.
-
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* Use SGS_* macros to control compilation in m68k.md */
-
-#define SGS_SWITCH_TABLES /* Different switch table handling */
-
-/* TODO: convert includes to ${tm_file} list in config.gcc. */
-#include "m68k/sgs.h" /* The m68k/SVR4 assembler is SGS based */
-
-#include "dbxelf.h"
-#include "elfos.h"
-#include "svr4.h" /* Pick up the generic SVR4 macros */
-
-/* See m68k.h. 7 means 68020 with 68881. */
-
-#ifndef TARGET_DEFAULT
-#define TARGET_DEFAULT (MASK_BITFIELD|MASK_68881|MASK_68020)
-#endif
-
-/* Override the definition of NO_DOLLAR_IN_LABEL in svr4.h, for special
- g++ assembler names. When this is defined, g++ uses embedded '.'
- characters and some m68k assemblers have problems with this. The
- chances are much greater that any particular assembler will permit
- embedded '$' characters. */
-
-#undef NO_DOLLAR_IN_LABEL
-
-/* Define PCC_STATIC_STRUCT_RETURN if the convention on the target machine
- is to use the nonreentrant technique for returning structure and union
- values, as commonly implemented by the AT&T Portable C Compiler (PCC).
- When defined, the gcc option -fpcc-struct-return can be used to cause
- this form to be generated. When undefined, the option does nothing.
- For m68k SVR4, the convention is to use a reentrant technique compatible
- with the gcc default, so override the definition of this macro in m68k.h */
-
-#undef PCC_STATIC_STRUCT_RETURN
-
-/* Provide a set of pre-definitions and pre-assertions appropriate for
- the m68k running svr4. __svr4__ is our extension. */
-
-#define CPP_PREDEFINES \
- "-Dm68k -Dunix -D__svr4__ -D__motorola__ \
- -Asystem=unix -Asystem=svr4 -Acpu=m68k -Amachine=m68k"
-
-/* Test to see if the target includes a 68881 by default, and use CPP_SPEC
- to control whether or not __HAVE_68881__ is defined by default or not.
- If a 68881 is the default, gcc will use inline 68881 instructions, by
- predefining __HAVE_68881__, unless -msoft-float is specified.
- If a 68881 is not the default, gcc will only define __HAVE_68881__ if
- -m68881 is specified. */
-
-#if TARGET_DEFAULT & MASK_68881
-#define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
-#else
-#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
-#endif
-
-/* Output assembler code to FILE to increment profiler label # LABELNO
- for profiling a function entry. We override the definition in m68k.h
- and match the way the native m68k/SVR4 compiler does profiling, with the
- address of the profile counter in a1, not a0, and using bsr rather
- than jsr. */
-
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO) \
- asm_fprintf ((FILE), "\tlea.l\t(%LLP%d,%Rpc),%Ra1\n\tbsr\t_mcount\n", \
- (LABELNO))
-
-/* Local common symbols are declared to the assembler with ".lcomm" rather
- than ".bss", so override the definition in svr4.h */
-/* ??? svr4.h no longer defines this, and this is only used by m68k/amix.h. */
-
-#undef BSS_ASM_OP
-#define BSS_ASM_OP "\t.lcomm\t"
-
-/* Register in which address to store a structure value is passed to a
- function. The default in m68k.h is a1. For m68k/SVR4 it is a0. */
-
-#undef STRUCT_VALUE_REGNUM
-#define STRUCT_VALUE_REGNUM 8
-
-/* Register in which static-chain is passed to a function. The
- default in m68k.h is a0, but that is already the struct value
- regnum. Make it a1 instead. */
-
-#undef STATIC_CHAIN_REGNUM
-#define STATIC_CHAIN_REGNUM 9
-
-#define ASM_COMMENT_START "#"
-
-#undef TYPE_OPERAND_FMT
-#define TYPE_OPERAND_FMT "@%s"
-
-/* Define how the m68k registers should be numbered for Dwarf output.
- The numbering provided here should be compatible with the native
- SVR4 SDB debugger in the m68k/SVR4 reference port, where d0-d7
- are 0-7, a0-a8 are 8-15, and fp0-fp7 are 16-23. */
-
-#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
-
-/* The ASM_OUTPUT_SKIP macro is first defined in m68k.h, using ".skip".
- It is then overridden by m68k/sgs.h to use ".space", and again by svr4.h
- to use ".zero". The m68k/SVR4 assembler uses ".space", so repeat the
- definition from m68k/sgs.h here. Note that ASM_NO_SKIP_IN_TEXT is
- defined in m68k/sgs.h, so we don't have to repeat it here. */
-
-#undef ASM_OUTPUT_SKIP
-#define ASM_OUTPUT_SKIP(FILE,SIZE) \
- fprintf (FILE, "%s%u\n", SPACE_ASM_OP, (SIZE))
-
-/* 1 if N is a possible register number for a function value.
- For m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral,
- pointer, or floating types, respectively. Reject fp0 if not using a
- 68881 coprocessor. */
-
-#undef FUNCTION_VALUE_REGNO_P
-#define FUNCTION_VALUE_REGNO_P(N) \
- ((N) == 0 || (N) == 8 || (TARGET_68881 && (N) == 16))
-
-/* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
- more than one register. */
-
-#undef NEEDS_UNTYPED_CALL
-#define NEEDS_UNTYPED_CALL 1
-
-/* Define how to generate (in the callee) the output value of a function
- and how to find (in the caller) the value returned by a function. VALTYPE
- is the data type of the value (as a tree). If the precise function being
- called is known, FUNC is its FUNCTION_DECL; otherwise, FUNC is 0.
- For m68k/SVR4 generate the result in d0, a0, or fp0 as appropriate. */
-
-#undef FUNCTION_VALUE
-#define FUNCTION_VALUE(VALTYPE, FUNC) \
- (TREE_CODE (VALTYPE) == REAL_TYPE && TARGET_68881 \
- ? gen_rtx_REG (TYPE_MODE (VALTYPE), 16) \
- : (POINTER_TYPE_P (VALTYPE) \
- ? gen_rtx_REG (TYPE_MODE (VALTYPE), 8) \
- : gen_rtx_REG (TYPE_MODE (VALTYPE), 0)))
-
-/* For compatibility with the large body of existing code which does not
- always properly declare external functions returning pointer types, the
- m68k/SVR4 convention is to copy the value returned for pointer functions
- from a0 to d0 in the function epilogue, so that callers that have
- neglected to properly declare the callee can still find the correct return
- value. */
-
-#define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) \
-do { \
- if (current_function_returns_pointer \
- && ! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode)) \
- asm_fprintf (FILE, "\tmov.l %Ra0,%Rd0\n"); \
-} while (0);
-
-/* Define how to find the value returned by a library function assuming the
- value has mode MODE.
- For m68k/SVR4 look for integer values in d0, pointer values in d0
- (returned in both d0 and a0), and floating values in fp0. */
-
-#undef LIBCALL_VALUE
-#define LIBCALL_VALUE(MODE) \
- ((((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode) \
- && TARGET_68881) \
- ? gen_rtx_REG ((MODE), 16) \
- : gen_rtx_REG ((MODE), 0))
-
-/* Boundary (in *bits*) on which stack pointer should be aligned.
- The m68k/SVR4 convention is to keep the stack pointer longword aligned. */
-
-#undef STACK_BOUNDARY
-#define STACK_BOUNDARY 32
-
-/* Alignment of field after `int : 0' in a structure.
- For m68k/SVR4, this is the next longword boundary. */
-
-#undef EMPTY_FIELD_BOUNDARY
-#define EMPTY_FIELD_BOUNDARY 32
-
-/* No data type wants to be aligned rounder than this.
- For m68k/SVR4, some types (doubles for example) are aligned on 8 byte
- boundaries */
-
-#undef BIGGEST_ALIGNMENT
-#define BIGGEST_ALIGNMENT 64
-
-/* SVR4 m68k assembler is bitching on the `comm i,1,1' which asks for
- 1 byte alignment. Don't generate alignment for COMMON seems to be
- safer until we the assembler is fixed. */
-#undef ASM_OUTPUT_ALIGNED_COMMON
-/* Same problem with this one. */
-#undef ASM_OUTPUT_ALIGNED_LOCAL
-
-/* The `string' directive on m68k svr4 does not handle string with
- escape char (ie., `\') right. Use normal way to output ASCII bytes
- seems to be safer. */
-#undef ASM_OUTPUT_ASCII
-#define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \
-do { \
- register size_t sp = 0, limit = (LEN); \
- fputs (integer_asm_op (1, TRUE), (FILE)); \
- do { \
- int ch = (PTR)[sp]; \
- if (ch > ' ' && ! (ch & 0x80) && ch != '\\') \
- { \
- fprintf ((FILE), "'%c", ch); \
- } \
- else \
- { \
- fprintf ((FILE), "0x%x", ch); \
- } \
- if (++sp < limit) \
- { \
- if ((sp % 10) == 0) \
- { \
- fprintf ((FILE), "\n%s", integer_asm_op (1, TRUE)); \
- } \
- else \
- { \
- putc (',', (FILE)); \
- } \
- } \
- } while (sp < limit); \
- putc ('\n', (FILE)); \
-} while (0)
-
-/* SVR4 m68k assembler is bitching on the syntax `2.b'.
- So use the "LLDnnn-LLnnn" format. Define LLDnnn after the table. */
-
-#undef ASM_OUTPUT_CASE_END
-#define ASM_OUTPUT_CASE_END(FILE,NUM,TABLE) \
-do { \
- if (switch_table_difference_label_flag) \
- asm_fprintf ((FILE), "%s%LLD%d,%LL%d\n", SET_ASM_OP, (NUM), (NUM)); \
- switch_table_difference_label_flag = 0; \
-} while (0)
-
-int switch_table_difference_label_flag;
-
-#undef ASM_OUTPUT_COMMON
-#undef ASM_OUTPUT_LOCAL
-#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
-( fputs (".comm ", (FILE)), \
- assemble_name ((FILE), (NAME)), \
- fprintf ((FILE), ",%u\n", (SIZE)))
-
-#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
-( fputs (".lcomm ", (FILE)), \
- assemble_name ((FILE), (NAME)), \
- fprintf ((FILE), ",%u\n", (SIZE)))
-
-/* Override the definition in svr4.h. In m68k svr4, using swbeg is the
- standard way to do switch table. */
-#undef ASM_OUTPUT_BEFORE_CASE_LABEL
-#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \
- fprintf ((FILE), "%s&%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1));
-
-/* In m68k svr4, a symbol_ref rtx can be a valid PIC operand if it is an
- operand of a function call. */
-#undef LEGITIMATE_PIC_OPERAND_P
-#define LEGITIMATE_PIC_OPERAND_P(X) \
- ((! symbolic_operand (X, VOIDmode) \
- && ! (GET_CODE (X) == CONST_DOUBLE && mem_for_const_double (X) != 0 \
- && GET_CODE (mem_for_const_double (X)) == MEM \
- && symbolic_operand (XEXP (mem_for_const_double (X), 0), \
- VOIDmode))) \
- || (GET_CODE (X) == SYMBOL_REF && SYMBOL_REF_FLAG (X)) \
- || PCREL_GENERAL_OPERAND_OK)
-
-/* Turn off function cse if we are doing PIC. We always want function call
- to be done as `bsr foo@PLTPC', so it will force the assembler to create
- the PLT entry for `foo'. Doing function cse will cause the address of `foo'
- to be loaded into a register, which is exactly what we want to avoid when
- we are doing PIC on svr4 m68k. */
-#undef OVERRIDE_OPTIONS
-#define OVERRIDE_OPTIONS \
-{ \
- if (flag_pic) flag_no_function_cse = 1; \
- if (! TARGET_68020 && flag_pic == 2) \
- error("-fPIC is not currently supported on the 68000 or 68010\n"); \
-}
-
-/* Output assembler code for a block containing the constant parts
- of a trampoline, leaving space for the variable parts. */
-
-/* On m68k svr4, the trampoline is different from the generic version
- in that we use a1 as the static call chain. */
-
-#undef TRAMPOLINE_TEMPLATE
-#define TRAMPOLINE_TEMPLATE(FILE) \
-{ \
- assemble_aligned_integer (2, GEN_INT (0x227a)); \
- assemble_aligned_integer (2, GEN_INT (8)); \
- assemble_aligned_integer (2, GEN_INT (0x2f3a)); \
- assemble_aligned_integer (2, GEN_INT (8)); \
- assemble_aligned_integer (2, GEN_INT (0x4e75)); \
- assemble_aligned_integer (4, const0_rtx); \
- assemble_aligned_integer (4, const0_rtx); \
-}
-
-/* Redefine since we are using a different trampoline */
-#undef TRAMPOLINE_SIZE
-#define TRAMPOLINE_SIZE 18
-
-/* Emit RTL insns to initialize the variable parts of a trampoline.
- FNADDR is an RTX for the address of the function's pure code.
- CXT is an RTX for the static chain value for the function. */
-
-#undef INITIALIZE_TRAMPOLINE
-#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
-{ \
- emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 10)), CXT); \
- emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 14)), FNADDR); \
-}
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