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/* m68kelf support, derived from m68kv4.h */
/* Target definitions for GNU compiler for mc680x0 running System V.4
Copyright (C) 1991, 1993, 2000, 2002, 2003, 2004, 2007, 2010
Free Software Foundation, Inc.
Written by Ron Guilmette (rfg@netcom.com) and Fred Fish (fnf@cygnus.com).
This file is part of GCC.
GCC 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 3, or (at your option)
any later version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef SWBEG_ASM_OP
#define SWBEG_ASM_OP "\t.swbeg\t"
#endif
/* Here are three prefixes that are used by asm_fprintf to
facilitate customization for alternate assembler syntaxes.
Machines with no likelihood of an alternate syntax need not
define these and need not use asm_fprintf. */
/* The prefix for register names. Note that REGISTER_NAMES
is supposed to include this prefix. Also note that this is NOT an
fprintf format string, it is a literal string */
#undef REGISTER_PREFIX
#define REGISTER_PREFIX "%"
/* The prefix for local (compiler generated) labels.
These labels will not appear in the symbol table. */
#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX "."
/* The prefix to add to user-visible assembler symbols. */
#undef USER_LABEL_PREFIX
#define USER_LABEL_PREFIX ""
/* config/m68k.md has an explicit reference to the program counter,
prefix this by the register prefix. */
#define ASM_RETURN_CASE_JUMP \
do { \
if (TARGET_COLDFIRE) \
{ \
if (ADDRESS_REG_P (operands[0])) \
return "jmp %%pc@(2,%0:l)"; \
else \
return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
} \
else \
return "jmp %%pc@(2,%0:w)"; \
} while (0)
/* This is how to output an assembler line that says to advance the
location counter to a multiple of 2**LOG bytes. */
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
do { \
if ((LOG) > 0) \
fprintf ((FILE), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG)); \
} while (0)
/* 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 M68K_STRUCT_VALUE_REGNUM
#define M68K_STRUCT_VALUE_REGNUM A0_REG
/* The static chain regnum defaults to a0, but we use that for
structure return, so have to use a1 for the static chain. */
#undef STATIC_CHAIN_REGNUM
#define STATIC_CHAIN_REGNUM A1_REG
#undef M68K_STATIC_CHAIN_REG_NAME
#define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a1"
#define ASM_COMMENT_START "|"
/* 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. */
#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
#if 0
/* SVR4 m68k assembler is bitching on the `comm i,1,1' which askes 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
#endif
#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", (int)(SIZE)))
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
( fputs (".lcomm ", (FILE)), \
assemble_name ((FILE), (NAME)), \
fprintf ((FILE), ",%u\n", (int)(SIZE)))
/* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
keep switch tables in the text section. */
#define JUMP_TABLES_IN_TEXT_SECTION 1
/* 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));
/* end of stuff from m68kv4.h */
#undef ENDFILE_SPEC
#define ENDFILE_SPEC "crtend.o%s"
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "crtbegin.o%s"
/* If defined, a C expression whose value is a string containing the
assembler operation to identify the following data as
uninitialized global data. If not defined, and neither
`ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
uninitialized global data will be output in the data section if
`-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
used. */
#ifndef BSS_SECTION_ASM_OP
#define BSS_SECTION_ASM_OP "\t.section\t.bss"
#endif
/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
separate, explicit argument. If you define this macro, it is used
in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
handling the required alignment of the variable. The alignment is
specified as the number of bits.
Try to use function `asm_output_aligned_bss' defined in file
`varasm.c' when defining this macro. */
#ifndef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
#endif
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