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- /* Definitions of target machine for GNU compiler. 64 bit ABI support.
- Copyright (C) 1994 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, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
- /* Macros to implement the 64 bit ABI. This file is meant to be included
- after mips.h. */
-
- #undef ABI_64BIT
- #define ABI_64BIT 1
-
- /* For Irix 6, -mips3 implies TARGET_LONG64. */
- #undef TARGET_LONG64
- #define TARGET_LONG64 (target_flags & MASK_64BIT)
-
- #undef CPP_PREDEFINES
- #define CPP_PREDEFINES \
- "-Dunix -Dmips -Dsgi -Dhost_mips -DMIPSEB -D_MIPSEB -DSYSTYPE_SVR4 \
- -D_SVR4_SOURCE -D_MODERN_C -D__DSO__ \
- -Asystem(unix) -Asystem(svr4) -Acpu(mips) -Amachine(sgi)"
-
- /* We must make -mips3 do what -mlong64 used to do. */
- #undef CPP_SPEC
- #define CPP_SPEC "\
- %{!ansi:-D__EXTENSIONS__ -D_SGI_SOURCE -D_LONGLONG} \
- %{.cc: -D_LANGUAGE_C_PLUS_PLUS} \
- %{.cxx: -D_LANGUAGE_C_PLUS_PLUS} \
- %{.C: -D_LANGUAGE_C_PLUS_PLUS} \
- %{.m: -D_LANGUAGE_OBJECTIVE_C -D_LANGUAGE_C} \
- %{.S: -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
- %{.s: -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
- %{!.S:%{!.s: %{!.cc: %{!.cxx: %{!.C: %{!.m: -D_LANGUAGE_C %{!ansi:-DLANGUAGE_C}}}}}}}\
- %{mfp32: -D_MIPS_FPSET=16}%{!mfp32: -D_MIPS_FPSET=32} \
- %{mips1: -D_MIPS_ISA=_MIPS_ISA_MIPS1} \
- %{mips2: -D_MIPS_ISA=_MIPS_ISA_MIPS2} \
- %{mips3: -D_MIPS_ISA=_MIPS_ISA_MIPS3} \
- %{mips4: -D_MIPS_ISA=_MIPS_ISA_MIPS4} \
- %{!mips1: %{!mips2: %{!mips3: %{!mips4: -D_MIPS_ISA=_MIPS_ISA_MIPS4}}}} \
- %{mips1: -D_MIPS_SIM=_MIPS_SIM_ABI32} \
- %{mips2: -D_MIPS_SIM=_MIPS_SIM_ABI32} \
- %{mips3: -D_ABI64=3 -D_MIPS_SIM=_ABI64} \
- %{mips4: -D_ABI64=3 -D_MIPS_SIM=_ABI64} \
- %{!mips1: %{!mips2: %{!mips3: %{!mips4: -D_ABI64=3 -D_MIPS_SIM=_ABI64}}}} \
- %{!mint64: -D_MIPS_SZINT=32}%{mint64: -D_MIPS_SZINT=64} \
- %{mips1: -D_MIPS_SZLONG=32}%{mips2: -D_MIPS_SZLONG=32} \
- %{!mips1:%{!mips2: -D_MIPS_SZLONG=64}} \
- %{mips1: -D_MIPS_SZPTR=32}%{mips2: -D_MIPS_SZPTR=32} \
- %{mips3: -D_MIPS_SZPTR=64}%{mips4: -D_MIPS_SZPTR=64} \
- %{!mips1: %{!mips2: %{!mips3: %{!mips4: -D_MIPS_SZPTR=64}}}} \
- %{!mips1:%{!mips2: -D_COMPILER_VERSION=601}} \
- %{mips1: -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int} \
- %{mips2: -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int} \
- %{!mips1:%{!mips2: -D__SIZE_TYPE__=long\\ unsigned\\ int -D__PTRDIFF_TYPE__=long\\ int}} \
- %{mips3:-U__mips -D__mips=3} \
- %{!mips1:%{!mips2:-U__mips -D__mips=4}}"
-
- #undef EMPTY_FIELD_BOUNDARY
- #define EMPTY_FIELD_BOUNDARY 32
-
- #undef STACK_BOUNDARY
- #define STACK_BOUNDARY 128
-
- #undef MIPS_STACK_ALIGN
- #define MIPS_STACK_ALIGN(LOC) (((LOC)+15) & ~15)
-
- #undef GP_ARG_LAST
- #define GP_ARG_LAST (mips_isa < 3 ? GP_REG_FIRST + 7 : GP_REG_FIRST + 11)
- #undef FP_ARG_LAST
- #define FP_ARG_LAST (mips_isa < 3 ? FP_REG_FIRST + 15 : FP_REG_FIRST + 19)
-
- /* fp20-23 are now caller saved. */
- #undef SUBTARGET_CONDITIONAL_REGISTER_USAGE
- #define SUBTARGET_CONDITIONAL_REGISTER_USAGE \
- { \
- if (mips_isa >= 3) \
- { \
- int regno; \
- for (regno = FP_REG_FIRST + 20; regno < FP_REG_FIRST + 24; regno++) \
- call_used_regs[regno] = 1; \
- } \
- }
-
- #undef MAX_ARGS_IN_REGISTERS
- #define MAX_ARGS_IN_REGISTERS (mips_isa < 3 ? 4 : 8)
-
- #undef REG_PARM_STACK_SPACE
- #define REG_PARM_STACK_SPARC(FNDECL) \
- (mips_abi < 3 \
- ? (MAX_ARGS_IN_REGISTERS*UNITS_PER_WORD) - FIRST_PARM_OFFSET (FNDECL) \
- : 0)
-
- #define FUNCTION_ARG_PADDING(MODE, TYPE) \
- (! BYTES_BIG_ENDIAN \
- ? upward \
- : (((MODE) == BLKmode \
- ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
- && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT))\
- : (GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY \
- && (mips_isa < 3 || GET_MODE_CLASS (MODE) == MODE_INT))) \
- ? downward : upward))
-
- extern struct rtx_def *type_dependent_reg ();
- #define TYPE_DEPENDENT_REG(REGNO, INDEX, TYPE) \
- type_dependent_reg (REGNO, INDEX, TYPE)
-
- #undef RETURN_IN_MEMORY
- #define RETURN_IN_MEMORY(TYPE) \
- (mips_isa < 3 ? TYPE_MODE (TYPE) == BLKmode : int_size_in_bytes (TYPE) > 16)
-
- extern struct rtx_def *mips_function_value ();
- #undef FUNCTION_VALUE
- #define FUNCTION_VALUE(VALTYPE, FUNC) mips_function_value (VALTYPE, FUNC)
-
- /* For varargs, we must save the current argument, because it is the fake
- argument va_alist, and will need to be converted to the real argument.
- For stdarg, we do not need to save the current argument, because it
- is a real argument. */
- #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
- { if (mips_isa >= 3 && (CUM).arg_words < MAX_ARGS_IN_REGISTERS - 1) \
- { \
- PRETEND_SIZE \
- = (MAX_ARGS_IN_REGISTERS - (CUM).arg_words \
- - ! current_function_varargs) * UNITS_PER_WORD; \
- \
- if (! (NO_RTL)) \
- { \
- rtx mem = gen_rtx (MEM, BLKmode, \
- plus_constant (virtual_incoming_args_rtx, \
- - PRETEND_SIZE)); \
- /* va_arg is an array access in this case, which causes it to \
- get MEM_IN_STRUCT_P set. We must set it here so that the \
- insn scheduler won't assume that these stores can't \
- possibly overlap with the va_arg loads. */ \
- if (BYTES_BIG_ENDIAN) \
- MEM_IN_STRUCT_P (mem) = 1; \
- move_block_from_reg \
- ((CUM).arg_words + GP_ARG_FIRST + ! current_function_varargs, \
- mem, \
- (MAX_ARGS_IN_REGISTERS - (CUM).arg_words \
- - ! current_function_varargs), \
- PRETEND_SIZE); \
- } \
- } \
- }
-
- #define STRICT_ARGUMENT_NAMING
-
- /* ??? Unimplemented stuff follows. */
-
- /* ??? Add support for 16 byte/128 bit long doubles here when
- mips_isa >= 3. */
-
- /* ??? Make main return zero if user did not specify return value. */
-
- /* ??? Add support for .interfaces section, so as to get linker warnings
- when stdarg functions called without prototype in scope? */
-
- /* ??? Could optimize structure passing by putting the right register rtx
- into the field decl, so that if we use the field, we can take the value from
- a register instead of from memory. */
-
-