config.gcc (mmix-*-*): New target.

	* config.gcc (mmix-*-*): New target.
	* doc/invoke.texi: Document MMIX options.
	* doc/contrib.texi: Add note about MMIX port to my entry.
	* config/mmix/t-mmix: New file.
	* config/mmix/mmix.h: New file.
	* config/mmix/mmix-protos.h: New file.
	* config/mmix/mmix.c: New file.
	* config/mmix/mmix.md: New file.
	* config/mmix/crti.asm: New file.
	* config/mmix/crtn.asm: New file.

From-SVN: r46746

gcc/ChangeLog

+2001-11-03  Hans-Peter Nilsson  <hp@bitrange.com>
+
+	* config.gcc (mmix-*-*): New target.
+	* doc/invoke.texi: Document MMIX options.
+	* doc/contrib.texi: Add note about MMIX port to my entry.
+	* config/mmix/t-mmix: New file.
+	* config/mmix/mmix.h: New file.
+	* config/mmix/mmix-protos.h: New file.
+	* config/mmix/mmix.c: New file.
+	* config/mmix/mmix.md: New file.
+	* config/mmix/crti.asm: New file.
+	* config/mmix/crtn.asm: New file.
+
 2001-11-03  Kazu Hirata  <kazu@hxi.com>
 
 	* config/sparc/linux-aout.h: Fix comment formatting.

gcc/config.gcc

@@ -2554,6 +2554,8 @@ mips-*-*)				# Default MIPS RISC-OS 4.0.
 		use_collect2=yes
 	fi
 	;;
+mmix-knuth-mmixware)
+	;;
 mn10200-*-*)
 	float_format=i32
 	tm_file="elfos.h svr4.h ${tm_file}"

gcc/config/mmix/crti.asm

+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   Contributed by Hans-Peter Nilsson <hp@bitrange.com>
+
+This file 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.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file 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 this program; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+% This is crt0 for mmix-knuth-mmixware, for setting up things for
+% compiler-generated assembler and for setting up things between where the
+% simulator calls and main, and shutting things down on the way back.
+
+% This file and the GCC output are supposed to be *reasonably*
+% mmixal-compatible to enable people to re-use output with Knuth's mmixal.
+% However, forward references are used more freely: we are using the
+% binutils tools.  Users of mmixal beware; you will sometimes have to
+% re-order things or use temporary variables.
+
+% Users of mmixal will want to set up 8H and 9H to be .text and .data
+% respectively, so the compiler can switch between them pretending they're
+% segments.
+
+% This little treasure is here so the 32 lowest address bits of user data
+% will not be zero.  Because of truncation, that would cause test-case
+% gcc.c-torture/execute/980701-1.c to incorrectly fail.
+	.data	! mmixal:= 8H LOC Data_Segment
+	.p2align 3
+	LOC @+(8-@)@7
+	OCTA 2009
+
+	.text	! mmixal:= 9H LOC 8B; LOC #100
+	.global Main
+
+% The __Stack_start symbol is provided by the link script.
+stackpp	OCTA __Stack_start
+
+% "Main" is the magic symbol the simulator jumps to.  We want to go
+% on to "main".
+% We need to set rG explicitly to avoid hard-to-debug situations.
+Main	SETL	$255,32
+	PUT	rG,$255
+
+% Initialize the stack pointer.  It is supposedly made a global
+% zero-initialized (allowed to change) register in crtn.asm; we use the
+% explicit number.
+	GETA	$255,stackpp
+	LDOU	$254,$255,0
+
+% Make sure we get more than one mem, to simplify counting cycles.
+	LDBU	$255,$1,0
+	LDBU	$255,$1,1
+
+	PUSHJ	$2,_init
+
+#ifdef __MMIX_ABI_GNU__
+% Copy argc and argv from their initial position to argument registers
+% where necessary.
+	SET	$232,$0
+	SET	$233,$1
+#else
+% For the mmixware ABI, we need to move arguments.  The return value will
+% appear in $0.
+	SET	$2,$1
+	SET	$1,$0
+#endif
+
+	PUSHJ	$0,main
+	JMP	exit
+
+% Provide first part of _init and _fini.  Save the return address on the
+% register stack.  We eventually ignore the return address of these
+% PUSHJ:s, so it doesn't matter that whether .init and .fini code calls
+% functions or where they store rJ.  We shouldn't get there, so abort if
+% that happens
+
+	.section .init,"ax",@progbits
+	.global	_init
+_init:
+	GET	$0,:rJ
+	PUSHJ	$1,0F
+	SETL	$255,255
+	TRAP	0,0,0
+0H	IS	@
+
+	.section .fini,"ax",@progbits
+	.global	_fini
+_fini:
+	GET	$0,:rJ
+	PUSHJ	$1,0F
+	SETL	$255,255
+	TRAP	0,0,0
+0H	IS	@

gcc/config/mmix/crtn.asm

+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   Contributed by Hans-Peter Nilsson <hp@bitrange.com>
+
+This file 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.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file 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 this program; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+% This must be the last file on the link-line, allocating global registers
+% from the top.
+
+% Register $254 is the stack-pointer.
+sp GREG
+
+% Register $253 is frame-pointer.  It's not supposed to be used in most
+% functions.
+fp GREG
+
+% $252 is the static chain register; nested functions receive the
+% context of the surrounding function through a pointer passed in this
+% register.
+static_chain GREG
+struct_value_reg GREG
+
+% These registers are used to pass state at an exceptional return (C++).
+eh_state_3 GREG
+eh_state_2 GREG
+eh_state_1 GREG
+eh_state_0 GREG
+
+#ifdef __MMIX_ABI_GNU__
+
+% Allocate global registers used by the GNU ABI.
+gnu_parm_reg_16 GREG
+gnu_parm_reg_15 GREG
+gnu_parm_reg_14 GREG
+gnu_parm_reg_13 GREG
+gnu_parm_reg_12 GREG
+gnu_parm_reg_11 GREG
+gnu_parm_reg_10 GREG
+gnu_parm_reg_9 GREG
+gnu_parm_reg_8 GREG
+gnu_parm_reg_7 GREG
+gnu_parm_reg_6 GREG
+gnu_parm_reg_5 GREG
+gnu_parm_reg_4 GREG
+gnu_parm_reg_3 GREG
+gnu_parm_reg_2 GREG
+gnu_parm_reg_1 GREG
+
+#endif /* __MMIX_ABI_GNU__ */
+
+% Provide last part of _init and _fini.
+
+% The return address is stored in the topmost stored register in the
+% register-stack.  We ignore the current value in rJ.  It is probably
+% garbage because each fragment of _init and _fini may have their own idea
+% of the current stack frame, if they're cut out from a "real" function
+% like in gcc/crtstuff.c.
+
+	.section .init,"ax",@progbits
+	GETA	$255,0F
+	PUT	rJ,$255
+	POP	0,0
+0H	PUT	rJ,$0
+	POP	0,0
+	
+	.section .fini,"ax",@progbits
+	GETA	$255,0F
+	PUT	rJ,$255
+0H	PUT	rJ,$0
+	POP	0,0

gcc/config/mmix/mmix-protos.h

+/* Prototypes for exported functions defined in mmix.c
+   Copyright (C) 2000, 2001  Free Software Foundation, Inc.
+   Contributed by Hans-Peter Nilsson (hp@bitrange.com)
+
+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.  */
+
+extern void mmix_override_options PARAMS ((void));
+extern void mmix_init_expanders PARAMS ((void));
+extern int mmix_eh_return_data_regno PARAMS ((int));
+extern int mmix_initial_elimination_offset PARAMS ((int, int));
+extern int mmix_starting_frame_offset PARAMS ((void));
+extern int mmix_function_arg_regno_p PARAMS ((int, int));
+extern void mmix_function_profiler PARAMS ((FILE *, int));
+extern void mmix_function_block_profiler PARAMS ((FILE *, int));
+extern void mmix_block_profiler PARAMS ((FILE *, int));
+extern void mmix_function_block_profiler_exit PARAMS ((FILE *));
+extern void mmix_trampoline_template PARAMS ((FILE *));
+extern int mmix_trampoline_size;
+extern int mmix_reversible_cc_mode PARAMS ((enum machine_mode));
+extern int mmix_register_move_cost
+  PARAMS ((enum machine_mode, enum reg_class, enum reg_class));
+extern const char *mmix_text_section_asm_op PARAMS ((void));
+extern const char *mmix_data_section_asm_op PARAMS ((void));
+extern const char *mmix_strip_name_encoding PARAMS ((const char *));
+extern void mmix_asm_file_start PARAMS ((FILE *));
+extern void mmix_asm_file_end PARAMS ((FILE *));
+extern void mmix_asm_identify_gcc PARAMS ((FILE *));
+extern void mmix_asm_output_source_filename PARAMS ((FILE *, const char *));
+extern void mmix_output_quoted_string PARAMS ((FILE *, const char *, int));
+extern void mmix_asm_output_source_line  PARAMS ((FILE *, int));
+extern void mmix_asm_output_ascii PARAMS ((FILE *, const char *, int));
+extern void mmix_asm_output_label PARAMS ((FILE *, const char *));
+extern void mmix_asm_globalize_label PARAMS ((FILE *, const char *));
+extern void mmix_asm_weaken_label PARAMS ((FILE *, const char *));
+extern void mmix_asm_output_labelref PARAMS ((FILE *, const char *));
+extern void mmix_asm_output_internal_label
+  PARAMS ((FILE *, const char *, int));
+extern void mmix_asm_output_def PARAMS ((FILE *, const char *, const char *));
+extern void mmix_asm_output_define_label_difference_symbol
+  PARAMS ((FILE *, const char *, const char *, const char *));
+extern int mmix_print_operand_punct_valid_p PARAMS ((int));
+extern void mmix_asm_output_reg_push PARAMS ((FILE *, int));
+extern void mmix_asm_output_reg_pop PARAMS ((FILE *, int));
+extern void mmix_asm_output_skip PARAMS ((FILE *, int));
+extern void mmix_asm_output_align PARAMS ((FILE *, int));
+extern int mmix_shiftable_wyde_value PARAMS ((unsigned HOST_WIDEST_INT));
+extern void mmix_output_register_setting
+  PARAMS ((FILE *, int, HOST_WIDEST_INT, int));
+extern void mmix_conditional_register_usage PARAMS ((void));
+extern int mmix_dbx_register_number PARAMS ((int));
+
+/* Things that need rtl.h, tree.h or real.h included, or in combination.  */
+
+/* Need tree.h */
+#ifdef TREE_CODE
+
+extern void mmix_make_decl_one_only PARAMS ((tree));
+extern int mmix_function_arg_pass_by_reference
+  PARAMS ((const CUMULATIVE_ARGS *, enum machine_mode, tree, int));
+extern rtx mmix_function_outgoing_value PARAMS ((tree, tree));
+extern int mmix_data_alignment PARAMS ((tree, int));
+extern int mmix_constant_alignment PARAMS ((tree, int));
+extern int mmix_local_alignment PARAMS ((tree, int));
+extern void mmix_setup_incoming_varargs
+  PARAMS ((CUMULATIVE_ARGS *, enum machine_mode, tree, int *, int));
+extern void mmix_select_section PARAMS ((tree, int, int));
+extern void mmix_encode_section_info PARAMS ((tree));
+extern void mmix_unique_section PARAMS ((tree, int));
+extern void mmix_asm_output_pool_prologue
+  PARAMS ((FILE *, const char *, tree, int));
+extern void mmix_asm_output_aligned_common
+  PARAMS ((FILE *, const char *, int, int));
+extern void mmix_asm_output_aligned_local
+  PARAMS ((FILE *, const char *, int, int));
+extern void mmix_asm_declare_register_global
+  PARAMS ((FILE *, tree, int, const char *));
+extern void mmix_asm_output_mi_thunk PARAMS ((FILE *, tree, int, tree));
+
+/* Need tree.h and rtl.h */
+# ifdef RTX_CODE
+extern rtx mmix_function_arg
+  PARAMS ((const CUMULATIVE_ARGS *, enum machine_mode, tree, int, int));
+extern rtx mmix_expand_builtin_va_arg PARAMS ((tree, tree));
+# endif /* RTX_CODE */
+#endif /* TREE_CODE */
+
+/* Need rtl.h */
+#ifdef RTX_CODE
+extern void mmix_asm_output_addr_diff_elt PARAMS ((FILE *, rtx, int, int));
+extern void mmix_asm_output_addr_vec_elt PARAMS ((FILE *, int));
+extern enum reg_class mmix_preferred_reload_class
+  PARAMS ((rtx, enum reg_class));
+extern enum reg_class mmix_preferred_output_reload_class
+  PARAMS ((rtx, enum reg_class));
+extern enum reg_class mmix_secondary_reload_class
+  PARAMS ((enum reg_class, enum machine_mode, rtx, int));
+extern int mmix_const_ok_for_letter_p PARAMS ((HOST_WIDE_INT, int));
+extern int mmix_const_double_ok_for_letter_p PARAMS ((rtx, int));
+extern int mmix_extra_constraint PARAMS ((rtx, int));
+extern rtx mmix_dynamic_chain_address PARAMS ((rtx));
+extern rtx mmix_return_addr_rtx PARAMS ((int, rtx));
+extern rtx mmix_eh_return_stackadj_rtx PARAMS ((void));
+extern rtx mmix_eh_return_handler_rtx PARAMS ((void));
+extern void mmix_initialize_trampoline PARAMS ((rtx, rtx, rtx));
+extern int mmix_constant_address_p PARAMS ((rtx));
+extern int mmix_legitimate_address PARAMS ((enum machine_mode, rtx, int));
+extern int mmix_legitimate_constant_p PARAMS ((rtx));
+extern enum machine_mode mmix_select_cc_mode PARAMS ((RTX_CODE, rtx, rtx));
+extern void mmix_canonicalize_comparison PARAMS ((RTX_CODE *, rtx *, rtx *));
+extern int mmix_rtx_cost_recalculated
+  PARAMS ((rtx, RTX_CODE, RTX_CODE, int *));
+extern int mmix_address_cost PARAMS ((rtx));
+extern void mmix_asm_output_double_int PARAMS ((FILE *, rtx, int));
+extern void mmix_print_operand PARAMS ((FILE *, rtx, int));
+extern void mmix_print_operand_address PARAMS ((FILE *, rtx));
+extern int mmix_valid_comparison PARAMS ((RTX_CODE, enum machine_mode, rtx));
+extern rtx mmix_gen_compare_reg PARAMS ((enum rtx_code, rtx, rtx));
+#endif /* RTX_CODE */
+
+extern int mmix_asm_preferred_eh_data_format PARAMS ((int, int));
+extern void mmix_setup_frame_addresses PARAMS ((void));
+
+/* Need real.h */
+#ifdef GCC_REAL_H
+extern void mmix_asm_output_double PARAMS ((FILE *, REAL_VALUE_TYPE *));
+extern void mmix_asm_output_float PARAMS ((FILE *, REAL_VALUE_TYPE *));
+#endif /* GCC_REAL_H */
+
+/*
+ * Local variables:
+ * eval: (c-set-style "gnu")
+ * indent-tabs-mode: t
+ * End:
+ */

gcc/config/mmix/t-mmix

+# See "Target Fragment" in GCC info.  That same order is used here.
+LIBGCC1 =
+
+# libgcc1-test doesn't work.  There's critical stuff in crti and crtn and
+# we know the result of running libgcc1-test anyway.
+LIBGCC1_TEST =
+CROSS_LIBGCC1 =
+
+TARGET_LIBGCC2_CFLAGS = -mlibfuncs -Dinhibit_libc -O2
+
+EXTRA_MULTILIB_PARTS = crti.o crtn.o crtbegin.o crtend.o
+
+MULTILIB_OPTIONS = mabi=gnu
+MULTILIB_DIRNAMES = gnuabi
+
+$(T)crti.o: $(srcdir)/config/mmix/crti.asm $(GCC_PASSES)
+	$(GCC_FOR_TARGET) -c -o crti.o -x assembler-with-cpp $(srcdir)/config/mmix/crti.asm
+
+$(T)crtn.o: $(srcdir)/config/mmix/crtn.asm $(GCC_PASSES)
+	$(GCC_FOR_TARGET) -c -o crtn.o -x assembler-with-cpp $(srcdir)/config/mmix/crtn.asm

gcc/doc/contrib.texi

@@ -384,8 +384,8 @@ NeXT, Inc.@: donated the front end that supports the Objective-C
 language.
 
 @item
-Hans-Peter Nilsson for the CRIS port, improvements to the search engine
-setup, various documentation fixes and other small fixes.
+Hans-Peter Nilsson for the CRIS and MMIX ports, improvements to the search
+engine setup, various documentation fixes and other small fixes.
 
 @item
 Geoff Noer for this work on getting cygwin native builds working.

gcc/doc/invoke.texi

@@ -574,6 +574,12 @@ in the following sections.
 -mno-callgraph-data  -mslow-bytes  -mno-slow-bytes  -mno-lsim @gol
 -mlittle-endian  -mbig-endian  -m210  -m340  -mstack-increment}
 
+@emph{MMIX Options}
+@gccoptlist{
+-mlibfuncs -mno-libfuncs -mepsilon -mno-epsilon -mabi=gnu @gol
+-mabi=mmixware -mzero-extend -mknuthdiv -mtoplevel-symbols @gol
+-melf}
+
 @emph{IA-64 Options}
 @gccoptlist{
 -mbig-endian  -mlittle-endian  -mgnu-as  -mgnu-ld  -mno-pic @gol
@@ -5116,6 +5122,7 @@ that macro, which enables you to change the defaults.
 * D30V Options::
 * S/390 and zSeries Options::
 * CRIS Options::
+* MMIX Options::
 @end menu
 
 @node M680x0 Options
@@ -9633,6 +9640,52 @@ Like @option{-sim}, but pass linker options to locate initialized data at
 0x40000000 and zero-initialized data at 0x80000000.
 @end table
 
+@node MMIX Options
+@subsection MMIX Options
+@cindex MMIX Options
+
+These options are defined for the MMIX:
+
+@table @code
+@item -mlibfuncs
+@itemx -mno-libfuncs
+Specify that intrinsic library functions are being compiled, passing all
+values in registers, no matter the size.
+
+@item -mepsilon
+@itemx -mno-epsilon
+Generate floating-point comparison instructions that compare with respect
+to the @code{rE} epsilon register.
+
+@item -mabi=mmixware
+@itemx -mabi=gnu
+Generate code that passes function parameters and return values that (in
+the called function) are seen as registers @code{$0} and up, as opposed to
+the GNU ABI which uses global registers @code{$231} and up.
+
+@item -mzero-extend
+@item -mno-zero-extend
+When reading data from memory in sizes shorter than 64 bits, use (do not
+use) zero-extending load instructions by default, rather than
+sign-extending ones.
+
+@item -mknuthdiv
+@itemx -mno-knuthdiv
+Make the result of a division yielding a remainder have the same sign as
+the divisor.  With the default, @option{-mno-knuthdiv}, the sign of the
+result follows the sign of the dividend.  Both methods are arithmetically
+valid, the latter being almost exclusively used.
+
+@item -mtoplevel-symbols
+@itemx -mno-toplevel-symbols
+Prepend (do not prepend) a @code{:} to all global symbols, so the assembly
+code can be used with the @code{PREFIX} assembly directive.
+
+@item -melf
+Generate an executable in the @samp{ELF} format, rather than the default
+@samp{mmo} format used by the @command{mmix} simulator.
+@end table
+
 
 @node Code Gen Options
 @section Options for Code Generation Conventions