New file.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@8866 138bc75d-0d04-0410-961f-82ee72b054a4

7 files changed, 534 insertions, 0 deletions

diff --git a/gcc/config/mips/abi64.h b/gcc/config/mips/abi64.h
new file mode 100644
index 00000000000..b8456924f66
--- /dev/null
+++ b/gcc/config/mips/abi64.h
@@ -0,0 +1,166 @@
+/* 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, 675 Mass Ave, Cambridge, MA 02139, 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_MIPS_SIM=_MIPS_SIM_ABI64}	\
+%{mips4: -D_MIPS_SIM=_MIPS_SIM_ABI64}	\
+%{!mips1: %{!mips2: %{!mips3: %{!mips4: -D_MIPS_SIM=_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))							\
+	move_block_from_reg						\
+	  ((CUM).arg_words + GP_ARG_FIRST + ! current_function_varargs,	\
+	   gen_rtx (MEM, BLKmode,					\
+		    plus_constant (virtual_incoming_args_rtx,		\
+				   - PRETEND_SIZE)),			\
+	   (MAX_ARGS_IN_REGISTERS - (CUM).arg_words			\
+	    - ! current_function_varargs),				\
+	   PRETEND_SIZE, 0);						\
+    }									\
+}
+
+#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.  */
+
diff --git a/gcc/config/mips/cross64.h b/gcc/config/mips/cross64.h
new file mode 100644
index 00000000000..19c17fb5013
--- /dev/null
+++ b/gcc/config/mips/cross64.h
@@ -0,0 +1,36 @@
+/* Configuration for an Irix 5 host and Irix 6 target using SGI's cross64
+   package.  */
+
+#include "mips/iris6.h"
+
+#define STANDARD_INCLUDE_DIR "/usr/cross64/usr/include"
+#undef MD_EXEC_PREFIX
+#define MD_EXEC_PREFIX "/usr/cross64/usr/bin/"
+#undef MD_STARTFILE_PREFIX
+#define MD_STARTFILE_PREFIX "/usr/cross64/usr/lib/lib64/"
+
+/* Must add TOOLROOT to the environment, or else the assembler will not
+   work.  */
+#define INIT_ENVIRONMENT	\
+  putenv ("TOOLROOT=/usr/cross64")
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{mips1:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
+   %{mips2:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
+   %{!mips1:%{!mips2:%{pg:/usr/cross64/usr/lib64/mips4/gcrt1.o}		    \
+   %{!pg:%{p:/usr/cross64/usr/lib64/mips4/mcrt1.o			    \
+     /usr/cross64/usr/lib64/mips4/libprof1.a}				    \
+   %{!p:/usr/cross64/usr/lib64/mips4/crt1.o}}}}"
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+  "%{mips1:crtn.o%s}%{mips2:crtn.o%s}%{!mips1:%{!mips2:/usr/cross64/usr/lib64/mips4/crtn.o}}"
+
+#undef LINK_SPEC
+#define LINK_SPEC "\
+-64 -_SYSTYPE_SVR4 %{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
+%{bestGnum} %{shared} %{non_shared} \
+%{call_shared} %{no_archive} %{exact_version} \
+%{!shared: %{!non_shared: %{!call_shared: -call_shared -no_unresolved}}} \
+%{!mips1:%{!mips2:-L/usr/cross64/usr/lib64/mips4 -L/usr/cross64/usr/lib64}}"
diff --git a/gcc/config/mips/iris6.h b/gcc/config/mips/iris6.h
new file mode 100644
index 00000000000..ea710257274
--- /dev/null
+++ b/gcc/config/mips/iris6.h
@@ -0,0 +1,279 @@
+/* Definitions of target machine for GNU compiler.  Iris version 6.
+   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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Irix 6 uses DWARF.  */
+#define DWARF_DEBUGGING_INFO
+#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
+
+/* Default to -mips4.  */
+#define TARGET_DEFAULT MASK_ABICALLS|MASK_FLOAT64|MASK_64BIT
+#define MIPS_ISA_DEFAULT 4
+
+#include "mips/iris5gas.h"
+#include "mips/abi64.h"
+
+/* Irix 5 stuff that we don't need for Irix 6.  */
+#undef ASM_OUTPUT_UNDEF_FUNCTION
+#undef ASM_OUTPUT_EXTERNAL_LIBCALL
+#undef ASM_DECLARE_FUNCTION_SIZE
+
+/* Stuff we need for Irix 6 that isn't in Irix 5.  */
+
+#undef SET_ASM_OP	/* Has no equivalent.  See ASM_OUTPUT_DEF below.  */
+
+/* This is how to equate one symbol to another symbol.  The syntax used is
+   `SYM1=SYM2'.  Note that this is different from the way equates are done
+   with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'.  */
+
+#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
+ do {	fprintf ((FILE), "\t");						\
+	assemble_name (FILE, LABEL1);					\
+	fprintf (FILE, " = ");						\
+	assemble_name (FILE, LABEL2);					\
+	fprintf (FILE, "\n");						\
+  } while (0)
+
+#define POPSECTION_ASM_OP	".popsection"
+
+/* To enable use of init and fini sections.  */
+#define INIT_SECTION_ASM_OP	".section\t.init"
+#undef LD_INIT_SWITCH
+#undef LD_FINI_SWITCH
+#undef HAS_INIT_SECTION
+
+#define DEBUG_SECTION		".debug,1,0,0,1"
+#define LINE_SECTION		".line,1,0,0,1"
+#define SFNAMES_SECTION		".debug_sfnames,1,0,0,1"
+#define SRCINFO_SECTION		".debug_srcinfo,1,0,0,1"
+#define MACINFO_SECTION		".debug_macinfo,1,0,0,1"
+#define PUBNAMES_SECTION	".debug_pubnames,1,0,0,1"
+#define ARANGES_SECTION		".debug_aranges,1,0,0,1"
+
+#undef ASM_SPEC
+#if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0
+/* GAS */
+#define ASM_SPEC "\
+%{mmips-as: \
+	%{!.s:-nocpp} %{.s: %{cpp} %{nocpp}} \
+	%{pipe: %e-pipe is not supported.} \
+	%{K}} \
+%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} %{v} \
+%{noasmopt:-O0} \
+%{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}} \
+%{g} %{g0} %{g1} %{g2} %{g3} \
+%{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
+%{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
+%{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
+%{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
+%{membedded-pic}"
+
+#else
+/* not GAS */
+/* Must pass -g0 to the assembler, otherwise it may overwrite our
+   debug info with its own debug info. */
+/* Must pass -show instead of -v.  */
+/* Must pass -G 0 to the assembler, otherwise we may get warnings about
+   GOT overflow.  */
+#define ASM_SPEC "\
+%{!mgas: \
+	%{!.s:-nocpp} %{.s: %{cpp} %{nocpp}} \
+	%{pipe: %e-pipe is not supported.} \
+	%{K}} \
+%{G*} %{EB} %{EL} %{v:-show} \
+%{mips1} %{mips2} %{mips3} %{mips4} \
+%{!mips1: %{!mips2: %{!mips3: %{!mips4: -mips4}}}} \
+%{noasmopt:-O0} %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}} \
+-g0 -G 0 %{membedded-pic}"
+
+#endif
+
+/* Stuff for constructors.  Start here.  */
+
+#define CONST_SECTION_ASM_OP_32	"\t.rdata"
+#define CONST_SECTION_ASM_OP_64	".section\t.rodata"
+#define CTORS_SECTION_ASM_OP	".section\t.ctors,1,2,0,4"
+#define DTORS_SECTION_ASM_OP	".section\t.dtors,1,2,0,4"
+
+/* This is the pseudo-op used to generate a 32-bit word of data with a
+   specific value in some section.  This is the same for all known svr4
+   assemblers.  */
+
+#define INT_ASM_OP		".word"
+
+/* A default list of other sections which we might be "in" at any given
+   time.  For targets that use additional sections (e.g. .tdesc) you
+   should override this definition in the target-specific file which
+   includes this file.  */
+
+#undef EXTRA_SECTIONS
+#define EXTRA_SECTIONS in_sdata, in_rdata, in_const, in_ctors, in_dtors, in_bss
+
+/* A default list of extra section function definitions.  For targets
+   that use additional sections (e.g. .tdesc) you should override this
+   definition in the target-specific file which includes this file.  */
+
+/* ??? rdata_section is now same as svr4 const_section.  */
+
+#undef EXTRA_SECTION_FUNCTIONS
+#define EXTRA_SECTION_FUNCTIONS						\
+void									\
+sdata_section ()							\
+{									\
+  if (in_section != in_sdata)						\
+    {									\
+      fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP);		\
+      in_section = in_sdata;						\
+    }									\
+}									\
+									\
+void									\
+rdata_section ()							\
+{									\
+  if (in_section != in_rdata)						\
+    {									\
+      if (mips_isa >= 3)						\
+	fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP_64);	\
+      else								\
+	fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP_32);	\
+      in_section = in_rdata;						\
+    }									\
+}									\
+  CTORS_SECTION_FUNCTION						\
+  DTORS_SECTION_FUNCTION
+
+#define CTORS_SECTION_FUNCTION						\
+void									\
+ctors_section ()							\
+{									\
+  if (in_section != in_ctors)						\
+    {									\
+      fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP);		\
+      in_section = in_ctors;						\
+    }									\
+}
+
+#define DTORS_SECTION_FUNCTION						\
+void									\
+dtors_section ()							\
+{									\
+  if (in_section != in_dtors)						\
+    {									\
+      fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP);		\
+      in_section = in_dtors;						\
+    }									\
+}
+
+/* A C statement (sans semicolon) to output an element in the table of
+   global constructors.  */
+#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)				\
+  do {									\
+    ctors_section ();							\
+    fprintf (FILE, "\t%s\t ", INT_ASM_OP);				\
+    assemble_name (FILE, NAME);						\
+    fprintf (FILE, "\n");						\
+  } while (0)
+
+/* A C statement (sans semicolon) to output an element in the table of
+   global destructors.  */
+#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)       				\
+  do {									\
+    dtors_section ();                   				\
+    fprintf (FILE, "\t%s\t ", INT_ASM_OP);				\
+    assemble_name (FILE, NAME);              				\
+    fprintf (FILE, "\n");						\
+  } while (0)
+
+/* Stuff for constructors.  End here.  */
+
+/* ??? Perhaps just include svr4.h in this file?  */
+
+/* ??? SGI assembler may core dump when compiling with -g.
+   Sometimes as succeeds, but then we get a linker error. (cmds.c in 072.sc)
+   Getting rid of .file solves both problems.  */
+#undef ASM_OUTPUT_FILENAME
+#define ASM_OUTPUT_FILENAME(STREAM, NUM_SOURCE_FILENAMES, NAME) \
+do								\
+  {								\
+    fprintf (STREAM, "\t#.file\t%d ", NUM_SOURCE_FILENAMES);	\
+    output_quoted_string (STREAM, NAME);			\
+    fputs ("\n", STREAM);					\
+  }								\
+while (0)
+
+/* ??? SGI assembler gives warning whenever .lcomm is used.  */
+#undef ASM_OUTPUT_LOCAL
+#define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)	\
+do								\
+  {								\
+    if (mips_isa >= 3)						\
+      {								\
+	fputs ("\t.section\t.bss\n", STREAM);			\
+	ASM_DECLARE_OBJECT_NAME (STREAM, NAME, 0);		\
+	ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));	\
+	ASM_OUTPUT_SKIP (STREAM, SIZE);				\
+	fprintf (STREAM, "\t%s\n", POPSECTION_ASM_OP);		\
+      }								\
+    else							\
+      mips_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (SIZE)); \
+  }								\
+while (0)
+
+#undef ASM_OUTPUT_INTERNAL_LABEL
+#define ASM_OUTPUT_INTERNAL_LABEL(STREAM,PREFIX,NUM)			\
+  fprintf (STREAM, ".%s%d:\n", PREFIX, NUM)
+
+/* This is how to store into the string LABEL
+   the symbol_ref name of an internal numbered label where
+   PREFIX is the class of label and NUM is the number within the class.
+   This is suitable for output with `assemble_name'.  */
+
+#undef ASM_GENERATE_INTERNAL_LABEL
+#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)			\
+  sprintf (LABEL, "*.%s%d", PREFIX, NUM)
+
+#undef STARTFILE_SPEC
+/* Profiling is supported via libprof1.a not -lc_p as in Irix 3.  */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{mips1:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
+   %{mips2:%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
+   %{!mips1:%{!mips2:%{pg:/usr/lib64/gcrt1.o}%{!pg:%{p:/usr/lib64/mcrt1.o /usr/lib64/libprof1.a}%{!p:/usr/lib64/crt1.o}}}}"
+
+#undef LIB_SPEC
+#define LIB_SPEC "%{p:libprof1.a%s}%{pg:libprof1.a%s} -lc"
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+  "%{mips1:crtn.o%s}%{mips2:crtn.o%s}%{!mips1:%{!mips2:/usr/lib64/crtn.o}}"
+
+#undef LINK_SPEC
+#define LINK_SPEC "\
+%{G*} %{EB} %{EL} %{mips1} %{mips2} %{mips3} %{mips4} \
+%{bestGnum} %{shared} %{non_shared} \
+%{call_shared} %{no_archive} %{exact_version} \
+%{!shared: %{!non_shared: %{!call_shared: -call_shared -no_unresolved}}} \
+-_SYSTYPE_SVR4"
+
+/* ??? Debugging does not work.  We get many assembler core dumps,
+   and even some linker core dumps.  */
+#undef DBX_DEBUGGING_INFO
+#undef SDB_DEBUGGING_INFO
+#undef MIPS_DEBUGGING_INFO
+#undef DWARF_DEBUGGING_INFO
+#undef PREFERRED_DEBUGGING_TYPE
diff --git a/gcc/config/mips/t-cross64 b/gcc/config/mips/t-cross64
new file mode 100644
index 00000000000..9482412a844
--- /dev/null
+++ b/gcc/config/mips/t-cross64
@@ -0,0 +1,19 @@
+SYSTEM_HEADER_DIR = /usr/cross64/usr/include
+
+AR = /usr/cross64/usr/bin/ar
+
+FLOAT_H = $(CROSS_FLOAT_H)
+
+# The rest of the file is identical to t-iris6.
+
+# Suppress building libgcc1.a, since the MIPS compiler port is complete
+# and does not need anything from libgcc1.a.
+LIBGCC1 = 
+CROSS_LIBGCC1 = 
+
+MULTILIB_OPTIONS=mips1/mips2/mips3/mips4
+MULTILIB_DIRNAMES=
+MULTILIB_MATCHES=
+
+LIBGCC = stmp-multilib
+INSTALL_LIBGCC = install-multilib
diff --git a/gcc/config/mips/t-iris6 b/gcc/config/mips/t-iris6
new file mode 100644
index 00000000000..e1a4d50ce41
--- /dev/null
+++ b/gcc/config/mips/t-iris6
@@ -0,0 +1,11 @@
+# Suppress building libgcc1.a, since the MIPS compiler port is complete
+# and does not need anything from libgcc1.a.
+LIBGCC1 = 
+CROSS_LIBGCC1 = 
+
+MULTILIB_OPTIONS=mips1/mips2/mips3/mips4
+MULTILIB_DIRNAMES=
+MULTILIB_MATCHES=
+
+LIBGCC = stmp-multilib
+INSTALL_LIBGCC = install-multilib
diff --git a/gcc/config/mips/x-iris6 b/gcc/config/mips/x-iris6
new file mode 100644
index 00000000000..a1a4facc42f
--- /dev/null
+++ b/gcc/config/mips/x-iris6
@@ -0,0 +1,2 @@
+# Find all of the declarations from the header files
+FIXPROTO_DEFINES= -D__EXTENSIONS__
diff --git a/gcc/config/mips/xm-iris6.h b/gcc/config/mips/xm-iris6.h
new file mode 100644
index 00000000000..775497cc80f
--- /dev/null
+++ b/gcc/config/mips/xm-iris6.h
@@ -0,0 +1,21 @@
+#define MIPS_OVERRIDE_ALLOCA
+#ifndef __GNUC__
+#include <alloca.h>
+#else
+extern void *alloca ();
+#endif
+
+#include "mips/xm-iris5.h"
+
+#undef HOST_BITS_PER_LONG
+#define HOST_BITS_PER_LONG	64
+
+/* Declare some functions needed for this machine.  We don't want to
+   include these in the sources since other machines might define them
+   differently.  */
+
+extern void *malloc (), *realloc (), *calloc ();
+
+#ifndef inhibit_libc
+#include "string.h"
+#endif