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/* Definitions of target machine for GNU compiler. Apollo 680X0 version.
Copyright (C) 1989 Free Software Foundation, Inc.
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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "tm-m68k.h"
/* This symbol may be tested in other files for special Apollo handling */
#define TM_APOLLO
/* See tm-m68k.h. 7 means 68020 with 68881. */
#ifndef TARGET_DEFAULT
#define TARGET_DEFAULT 7
#endif
/* Target switches for the Apollo is the same as in tm-m68k.h, except
there is no Sun FPA. */
#undef TARGET_SWITCHES
#define TARGET_SWITCHES \
{ { "68020", 5}, \
{ "c68020", 5}, \
{ "68881", 2}, \
{ "bitfield", 4}, \
{ "68000", -5}, \
{ "c68000", -5}, \
{ "soft-float", -0102}, \
{ "nobitfield", -4}, \
{ "rtd", 8}, \
{ "nortd", -8}, \
{ "short", 040}, \
{ "noshort", -040}, \
{ "", TARGET_DEFAULT}}
/* Define __HAVE_68881__ in preprocessor,
according to the -m flags.
This will control the use of inline 68881 insns in certain macros.
Also inform the program which CPU this is for. */
#if TARGET_DEFAULT & 02
/* -m68881 is the default */
#define CPP_SPEC \
"%{!msoft-float:%{mfpa:-D__HAVE_FPA__ }%{!mfpa:-D__HAVE_68881__ }}\
%{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\
%{!ansi:-D_APOLLO_SOURCE}}"
#else
/* -msoft-float is the default */
#define CPP_SPEC \
"%{m68881:-D__HAVE_68881__ }%{mfpa:-D__HAVE_FPA__ }\
%{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\
%{!ansi:-D_APOLLO_SOURCE}}"
#endif
/* Names to predefine in the preprocessor for this target machine. */
/* These are the ones defined by Apollo, plus mc68000 for uniformity with
GCC on other 68000 systems. */
#define CPP_PREDEFINES "-Dapollo -Daegis -Dunix"
/* cpp has to support a #sccs directive for the /usr/include files */
#define SCCS_DIRECTIVE
/* Allow #ident but output nothing for it. */
#define IDENT_DIRECTIVE
#define ASM_OUTPUT_IDENT(FILE, NAME)
/* Allow dollarsigns in identifiers */
#define DOLLARS_IN_IDENTIFIERS 1
/* -m68000 requires special flags to the assembler.
The -C flag is passed to a modified GNU assembler to cause COFF
modules to be produced. Remove it if you're not using this.
(See vasta@apollo.com.) */
#define ASM_SPEC \
"-C %{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
/* STARTFILE_SPEC
Note that includes knowledge of the default specs for gcc, ie. no
args translates to the same effect as -m68881 */
/* To get ANSI-conformant behavior, a special version of crt0.o must be used.
We use the -ansi switch to pick up that version. */
#define STARTFILE_SPEC \
"%{ansi:/usr/apollo/lib/%{pg:gcrt0.o}%{!pg:%{p:mcrt0.o}%{!p:crt0.o}}}\
%{!ansi:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"
/* Make sure ld sets the entry point to _start.
This is in LIB_SPEC rather than LINK_SPEC because it needs to
come after _start is defined, and to eliminate the default LIB_SPEC. */
#define LIB_SPEC "-e _start"
/* Debugging is not supported yet */
#undef DBX_DEBUGGING_INFO
#undef SDB_DEBUGGING_INFO
/* Every structure or union's size must be a multiple of 2 bytes. */
#define STRUCTURE_SIZE_BOUNDARY 16
/* Functions which return large structures get the address
to place the wanted value at offset 8 from the frame. */
#undef PCC_STATIC_STRUCT_RETURN
#undef STRUCT_VALUE_REGNUM
/* Caller treats address of return area like a parm. */
#define STRUCT_VALUE 0
#define STRUCT_VALUE_INCOMING \
gen_rtx (MEM, Pmode, \
gen_rtx (PLUS, SImode, frame_pointer_rtx, \
gen_rtx (CONST_INT, VOIDmode, 8)))
/* Boundary (in *bits*) on which stack pointer should be aligned. */
#undef STACK_BOUNDARY
#define STACK_BOUNDARY 32
/* Specify how to pad function arguments.
Arguments are not padded at all; the stack is kept aligned on long
boundaries. */
#define FUNCTION_ARG_PADDING(mode, size) none
/* Short integral argument prototype promotion is not done */
#undef PROMOTE_PROTOTYPES
/* The definition of this macro imposes a limit on the size of
an aggregate object which can be treated as if it were a scalar
object. */
#define MAX_FIXED_MODE_SIZE BITS_PER_WORD
/* The definition of this macro implies that there are cases where
a scalar value cannot be returned in registers.
For Apollo, anything larger than one integer register is returned
using the structure-value mechanism, i.e. objects of DFmode are
returned that way. */
#define RETURN_IN_MEMORY(type) \
(GET_MODE_SIZE (TYPE_MODE (type)) > UNITS_PER_WORD)
/* This is how to output a reference to a user-level label named NAME.
In order to link to Apollo libraries, no underscore is prepended to names.
`assemble_name' uses this. */
#undef ASM_OUTPUT_LABELREF
#define ASM_OUTPUT_LABELREF(FILE,NAME) \
fprintf (FILE, "%s", NAME)
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