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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 Free Software Foundation, Inc.
Written by Ron Guilmette (rfg@netcom.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. */
/* #notinclude "m68k/sgs.h" / * The m68k/SVR4 assembler is SGS based */
/* These are necessary for -fpic/-fPIC to work correctly. */
#ifndef MOTOROLA
#define MOTOROLA /* Use MOTOROLA syntax. */
#endif
#ifndef USE_GAS /* forces jsbr instead of jsr. */
#define USE_GAS
#endif
#ifndef SWBEG_ASM_OP
#define SWBEG_ASM_OP "\t.swbeg\t"
#endif
/* Here are four 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 ""
/* The prefix for immediate operands. */
#undef IMMEDIATE_PREFIX
#define IMMEDIATE_PREFIX "#"
/* In the machine description we can't use %R, because it will not be seen
by ASM_FPRINTF. (Isn't that a design bug?). */
#undef REGISTER_PREFIX_MD
#define REGISTER_PREFIX_MD "%%"
/* 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_5200) \
return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
else \
return "jmp %%pc@(2,%0:w)"; \
} while (0)
/* How to refer to registers in assembler output.
This sequence is indexed by compiler's hard-register-number.
Motorola format uses different register names than defined
in m68k.h. */
#undef REGISTER_NAMES
#define REGISTER_NAMES \
{"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
"%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \
"%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
/* 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)); \
else if ((LOG) > 31) \
abort (); \
} while (0)
/* Use proper assembler syntax for these macros. */
#undef ASM_OUTPUT_REG_PUSH
#define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
asm_fprintf (FILE, "\t%Omove.l %s,-(%Rsp)\n", reg_names[REGNO])
#undef ASM_OUTPUT_REG_POP
#define ASM_OUTPUT_REG_POP(FILE,REGNO) \
asm_fprintf (FILE, "\t%Omove.l (%Rsp)+,%s\n", reg_names[REGNO])
/* 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
/* Local common symbols are declared to the assembler with ".lcomm" rather
than ".bss", so override the definition in svr4.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
#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)
/* 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))
#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
/* 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 int sp = 0, ch; \
fputs (integer_asm_op (1, TRUE), (FILE)); \
do { \
ch = (PTR)[sp]; \
if (ch > ' ' && ! (ch & 0x80) && ch != '\\') \
{ \
fprintf ((FILE), "'%c", ch); \
} \
else \
{ \
fprintf ((FILE), "0x%x", ch); \
} \
if (++sp < (LEN)) \
{ \
if ((sp % 10) == 0) \
{ \
fprintf ((FILE), "\n%s", integer_asm_op (1, TRUE)); \
} \
else \
{ \
putc (',', (FILE)); \
} \
} \
} while (sp < (LEN)); \
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)
extern 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)))
/* 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
/* 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) == SYMBOL_REF && SYMBOL_REF_FLAG (X)) \
|| PCREL_GENERAL_OPERAND_OK)
/* end of stuff from m68kv4.h */
#undef SGS_CMP_ORDER
#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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