4.4BSD/usr/src/contrib/gcc-2.3.3/config/apollo68.h
/* Definitions of target machine for GNU compiler. Apollo 680X0 version.
Copyright (C) 1989,1992 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 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "m68k.h"
/* This symbol may be tested in other files for special Apollo handling */
#define TM_APOLLO
/* See 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 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 2
/* -m68000 requires special flags to the assembler. */
#define ASM_SPEC \
"%{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 */
#if TARGET_DEFAULT & 2
/* -m68881 is the default */
#define STARTFILE_SPEC \
"%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
#else
/* -msoft-float is the default */
#define STARTFILE_SPEC \
"%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
#endif
/* Specify library to handle `-a' basic block profiling. */
#define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \
%{a:/usr/lib/bb_link.o} "
/* Debugging is not supported yet */
#undef DBX_DEBUGGING_INFO
#undef SDB_DEBUGGING_INFO
/* We have atexit(2). So C++ can use it for global destructors. */
#if 0 /* troy@cbme.unsw.edu.au says people are still using sr10.2
and it does not support atexit. */
#define HAVE_ATEXIT
#endif
/* Every structure or union's size must be a multiple of 2 bytes. */
#define STRUCTURE_SIZE_BOUNDARY 16
/* Boundary (in *bits*) on which stack pointer should be aligned. */
#undef STACK_BOUNDARY
#define STACK_BOUNDARY 32
/* Functions which return large structures get the address
to place the wanted value from a hidden parameter. */
#undef PCC_STATIC_STRUCT_RETURN
#undef STRUCT_VALUE_REGNUM
#define STRUCT_VALUE 0
#define STRUCT_VALUE_INCOMING 0
/* 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
/* 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)
/* In order to link with Apollo libraries, we can't prefix external
symbols with an underscore. */
#undef USER_LABEL_PREFIX
/* Use a prefix for local labels, just to be on the save side. */
#undef LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX "."
/* Use a register prefix to avoid clashes with external symbols (classic
example: `extern char PC;' in termcap). */
#undef REGISTER_PREFIX
#define REGISTER_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 return "jmp %%pc@(2,%0:w)"
/* Here are the new register names. */
#undef REGISTER_NAMES
#ifndef SUPPORT_SUN_FPA
#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" }
#else /* SUPPORTED_SUN_FPA */
#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", \
"%fpa0", "%fpa1", "%fpa2", "%fpa3", "%fpa4", "%fpa5", "%fpa6", "%fpa7", \
"%fpa8", "%fpa9", "%fpa10", "%fpa11", "%fpa12", "%fpa13", "%fpa14", "%fpa15", \
"%fpa16", "%fpa17", "%fpa18", "%fpa19", "%fpa20", "%fpa21", "%fpa22", "%fpa23", \
"%fpa24", "%fpa25", "%fpa26", "%fpa27", "%fpa28", "%fpa29", "%fpa30", "%fpa31" }
#endif /* defined SUPPORT_SUN_FPA */