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- /* 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/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 -Asystem(unix) -Acpu(m68k) -Amachine(m68k)"
-
- /* 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) \
- (TYPE_MODE (type) == BLKmode \
- || 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 */
-