MAINTAINERS: Resurrect the i860 maintainer.

2003-08-22  Jason Eckhardt  <jle@rice.edu>

ChangeLog
	* MAINTAINERS: Resurrect the i860 maintainer.

gcc/ChangeLog:
	* gcc/config.gcc (i860-*-sysv4*): Add target.
	* config/i860/i860-protos.h: New.
	* config/i860/i860.c: New.
	* config/i860/i860.h: New.
	* config/i860/i860.md: New.
	* config/i860/sysv4.h: New.
	* config/i860/varargs.asm: New.
	* config/i860/x-sysv4: New.

From-SVN: r70719

ChangeLog

+2003-08-22  Jason Eckhardt  <jle@rice.edu>
+
+	* MAINTAINERS: Resurrect the i860 maintainer.
+
 2003-08-20  Geoffrey Keating  <geoffk@apple.com>
 
 	PR 8180

MAINTAINERS

@@ -49,6 +49,7 @@ h8 port			Kazu Hirata		kazu@cs.umass.edu
 hppa port		Jeff Law		law@redhat.com
 hppa port		Dave Anglin		dave.anglin@nrc.ca
 i386 port		Richard Henderson	rth@redhat.com
+i860 port		Jason Eckhardt		jle@rice.edu
 i960 port		Jim Wilson		wilson@tuliptree.org
 ia64 port		Jim Wilson		wilson@tuliptree.org
 ip2k port		Denis Chertykov		denisc@overta.ru

gcc/ChangeLog

 2003-08-22  Jason Eckhardt  <jle@rice.edu>
 
+	* config.gcc (i860-*-sysv4*): Add target.
+	* config/i860/i860-protos.h: New.
+	* config/i860/i860.c: New.
+	* config/i860/i860.h: New.
+	* config/i860/i860.md: New.
+	* config/i860/sysv4.h: New.
+	* config/i860/varargs.asm: New.
+	* config/i860/x-sysv4: New.
+
+2003-08-22  Jason Eckhardt  <jle@rice.edu>
+
 	* config/pa/pa.c: Replace 'GNU CC' with 'GCC'.
 	Remove all uses of PARAMS macro.
 	Convert all function definitions to ISO C90 syntax.

gcc/config.gcc

@@ -1235,6 +1235,13 @@ i[34567]86-*-kaos*)
 	tm_file="${tm_file} i386/unix.h i386/att.h dbxelf.h elfos.h i386/i386elf.h kaos.h i386/kaos-i386.h"
 	tmake_file="i386/t-i386elf t-svr4"
 	;;
+i860-*-sysv4*)
+        tm_file="${tm_file} elfos.h svr4.h i860/sysv4.h"
+        xm_defines="USG SVR3"
+        xmake_file=i860/x-sysv4
+        tmake_file=t-svr4
+        extra_parts="crtbegin.o crtend.o"
+        ;;
 i960-*-coff*)
 	tm_file="${tm_file} dbxcoff.h i960/i960-coff.h libgloss.h"
 	tmake_file=i960/t-960bare

gcc/config/i860/i860-protos.h

+/* Definitions of target machine for GNU compiler, for Intel 860.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   Hacked substantially by Ron Guilmette (rfg@monkeys.com) to cater to
+   the whims of the System V Release 4 assembler.
+
+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.  */
+
+/* Declare things which are defined in i860.c but called from
+   insn-output.c.  */
+
+#ifdef RTX_CODE
+extern unsigned long sfmode_constant_to_ulong PARAMS ((rtx));
+extern const char *output_load PARAMS ((rtx *));
+extern const char *output_store PARAMS ((rtx *));
+extern const char *output_move_double PARAMS ((rtx *));
+extern const char *output_fp_move_double PARAMS ((rtx *));
+extern const char *output_block_move PARAMS ((rtx *));
+extern const char *output_delay_insn PARAMS ((rtx));
+#if 0
+extern const char *output_delayed_branch PARAMS ((const char *, rtx *, rtx));
+#endif
+extern void output_load_address PARAMS ((rtx *));
+extern int safe_insn_src_p PARAMS ((rtx, enum machine_mode));
+extern int operand_clobbered_before_used_after PARAMS ((rtx, rtx));
+extern int single_insn_src_p PARAMS ((rtx, enum machine_mode));
+extern int reg_or_0_operand PARAMS ((rtx, enum machine_mode));
+extern int arith_operand PARAMS ((rtx, enum machine_mode));
+extern int logic_operand PARAMS ((rtx, enum machine_mode));
+extern int shift_operand PARAMS ((rtx, enum machine_mode));
+extern int compare_operand PARAMS ((rtx, enum machine_mode));
+extern int bte_operand PARAMS ((rtx, enum machine_mode));
+extern int indexed_operand PARAMS ((rtx, enum machine_mode));
+extern int load_operand PARAMS ((rtx, enum machine_mode));
+extern int small_int PARAMS ((rtx, enum machine_mode));
+extern int logic_int PARAMS ((rtx, enum machine_mode));
+extern int call_insn_operand PARAMS ((rtx, enum machine_mode));
+extern rtx i860_saveregs PARAMS ((void));
+#ifdef TREE_CODE
+extern void i860_va_start PARAMS ((int, tree, rtx));
+extern rtx i860_va_arg PARAMS ((tree, tree));
+#endif /* TREE_CODE */
+#endif /* RTX_CODE */
+
+#ifdef TREE_CODE
+extern tree i860_build_va_list PARAMS ((void));
+#endif /* TREE_CODE */

gcc/config/i860/sysv4.h

+/* Target definitions for GNU compiler for Intel 80860 running System V.4
+   Copyright (C) 1991, 1996, 2000, 2002 Free Software Foundation, Inc.
+   Contributed by Ron Guilmette (rfg@monkeys.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.  */
+
+#undef TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (i860 System V Release 4)");
+
+/* Provide a set of pre-definitions and pre-assertions appropriate for
+   the i860 running svr4.  Note that the symbol `__svr4__' MUST BE
+   DEFINED!  It is needed so that the va_list struct in va-i860.h
+   will get correctly defined for the svr4 (ABI compliant) case rather
+   than for the previous (svr3, svr2, ...) case.  It also needs to be
+   defined so that the correct (svr4) version of __builtin_saveregs
+   will be selected when we are building gnulib2.c.
+   __svr4__ is our extension.  */
+
+#define CPP_PREDEFINES \
+  "-Di860 -Dunix -DSVR4 -D__svr4__ -Asystem=unix -Asystem=svr4 -Acpu=i860 -Amachine=i860"
+
+/* For the benefit of i860_va_arg, flag it this way too.  */
+
+#define I860_SVR4_VA_LIST 1
+
+/* The prefix to be used in assembler output for all names of registers.
+   This string gets prepended to all i860 register names (svr4 only).  */
+
+#define I860_REG_PREFIX	"%"
+
+#define ASM_COMMENT_START "#"
+
+#undef TYPE_OPERAND_FMT
+#define TYPE_OPERAND_FMT      "\"%s\""
+
+/* The following macro definition overrides the one in i860.h
+   because the svr4 i860 assembler requires a different syntax
+   for getting parts of constant/relocatable values.  */
+
+#undef PRINT_OPERAND_PART
+#define PRINT_OPERAND_PART(FILE, X, PART_CODE)				\
+  do { fprintf (FILE, "[");						\
+	output_address (X);						\
+	fprintf (FILE, "]@%s", PART_CODE);				\
+  } while (0)
+
+#undef ASM_FILE_START
+#define ASM_FILE_START(FILE)						\
+  do {	output_file_directive (FILE, main_input_filename);		\
+	fprintf (FILE, "\t.version\t\"01.01\"\n");			\
+  } while (0)
+
+/* Output the special word the svr4 SDB wants to see just before
+   the first word of each function's prologue code.  */
+
+extern const char *current_function_original_name;
+
+/* This special macro is used to output a magic word just before the
+   first word of each function.  On some versions of UNIX running on
+   the i860, this word can be any word that looks like a NOP, however
+   under svr4, this neds to be an `shr r0,r0,r0' instruction in which
+   the normally unused low-order bits contain the length of the function
+   prologue code (in bytes).  This is needed to make the svr4 SDB debugger
+   happy.  */
+
+#undef ASM_OUTPUT_FUNCTION_PREFIX
+#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME)			\
+  do {	ASM_OUTPUT_ALIGN (FILE, 2);					\
+  	fprintf ((FILE), "\t.long\t.ep.");				\
+	assemble_name (FILE, FNNAME);					\
+	fprintf (FILE, "-");						\
+	assemble_name (FILE, FNNAME);					\
+	fprintf (FILE, "+0xc8000000\n");				\
+	current_function_original_name = (FNNAME);			\
+  } while (0)
+
+/* Output the special label that must go just after each function's
+   prologue code to support svr4 SDB.  */
+
+#define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE)				\
+  do {	fprintf (FILE, ".ep.");						\
+	assemble_name (FILE, current_function_original_name);		\
+	fprintf (FILE, ":\n");						\
+  } while (0)
+
+/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
+ 
+   Note that we want to give these sections the SHF_WRITE attribute
+   because these sections will actually contain data (i.e. tables of
+   addresses of functions in the current root executable or shared library
+   file) and, in the case of a shared library, the relocatable addresses
+   will have to be properly resolved/relocated (and then written into) by
+   the dynamic linker when it actually attaches the given shared library
+   to the executing process.  (Note that on SVR4, you may wish to use the
+   `-z text' option to the ELF linker, when building a shared library, as
+   an additional check that you are doing everything right.  But if you do
+   use the `-z text' option when building a shared library, you will get
+   errors unless the .ctors and .dtors sections are marked as writable
+   via the SHF_WRITE attribute.)  */
+ 
+#undef CTORS_SECTION_ASM_OP
+#define CTORS_SECTION_ASM_OP	"\t.section\t.ctors,\"aw\""
+#undef DTORS_SECTION_ASM_OP
+#define DTORS_SECTION_ASM_OP	"\t.section\t.dtors,\"aw\""
+
+/* Add definitions to support the .tdesc section as specified in the svr4
+   ABI for the i860.  */
+
+#define TDESC_SECTION_ASM_OP    "\t.section\t.tdesc"
+
+#undef EXTRA_SECTIONS
+#define EXTRA_SECTIONS in_tdesc
+
+#undef EXTRA_SECTION_FUNCTIONS
+#define EXTRA_SECTION_FUNCTIONS						\
+  TDESC_SECTION_FUNCTION
+
+#define TDESC_SECTION_FUNCTION						\
+void									\
+tdesc_section ()							\
+{									\
+  if (in_section != in_tdesc)						\
+    {									\
+      fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP);		\
+      in_section = in_tdesc;						\
+    }									\
+}
+

gcc/config/i860/varargs.asm

+/* Special varargs support for i860.
+   Copyright (C) 2001  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.
+
+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.)
+
+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.  */
+
+#if defined(__svr4__) || defined(__alliant__)
+	.text
+	.align	4
+
+/* The Alliant needs the added underscore.  */
+	.globl	__builtin_saveregs
+__builtin_saveregs:
+	.globl	___builtin_saveregs
+___builtin_saveregs:
+
+	andnot	0x0f,%sp,%sp	/* round down to 16-byte boundary */
+	adds	-96,%sp,%sp  /* allocate stack space for reg save
+			   area and also for a new va_list
+			   structure */
+	/* Save all argument registers in the arg reg save area.  The
+	   arg reg save area must have the following layout (according
+	   to the svr4 ABI):
+
+	struct {
+	  union  {
+	    float freg[8];
+	    double dreg[4];
+	  } float_regs;
+	  long	ireg[12];
+	};
+	*/
+
+	fst.q	%f8,  0(%sp) /* save floating regs (f8-f15)  */
+	fst.q	%f12,16(%sp) 
+
+	st.l	%r16,32(%sp) /* save integer regs (r16-r27) */
+	st.l	%r17,36(%sp) 
+	st.l	%r18,40(%sp)
+	st.l	%r19,44(%sp)
+	st.l	%r20,48(%sp)
+	st.l	%r21,52(%sp)
+	st.l	%r22,56(%sp)
+	st.l	%r23,60(%sp)
+	st.l	%r24,64(%sp)
+	st.l	%r25,68(%sp)
+	st.l	%r26,72(%sp)
+	st.l	%r27,76(%sp)
+
+	adds	80,%sp,%r16  /* compute the address of the new
+			   va_list structure.  Put in into
+			   r16 so that it will be returned
+			   to the caller.  */
+
+	/* Initialize all fields of the new va_list structure.  This
+	   structure looks like:
+
+	typedef struct {
+	    unsigned long	ireg_used;
+	    unsigned long	freg_used;
+	    long	*reg_base;
+	    long	*mem_ptr;
+	} va_list;
+	*/
+
+	st.l	%r0, 0(%r16) /* nfixed */
+	st.l	%r0, 4(%r16) /* nfloating */
+	st.l    %sp, 8(%r16) /* __va_ctl points to __va_struct.  */
+	bri	%r1	/* delayed return */
+	st.l	%r28,12(%r16) /* pointer to overflow args */
+
+#else /* not __svr4__ */
+#if defined(__PARAGON__)
+	/*
+	 *	we'll use SVR4-ish varargs but need SVR3.2 assembler syntax,
+	 *	and we stand a better chance of hooking into libraries
+	 *	compiled by PGI.  [andyp@ssd.intel.com]
+	 */
+	.text
+	.align	4
+	.globl	__builtin_saveregs
+__builtin_saveregs:
+	.globl	___builtin_saveregs
+___builtin_saveregs:
+
+	andnot	0x0f,sp,sp	/* round down to 16-byte boundary */
+	adds	-96,sp,sp	/* allocate stack space for reg save
+			   area and also for a new va_list
+			   structure */
+	/* Save all argument registers in the arg reg save area.  The
+	   arg reg save area must have the following layout (according
+	   to the svr4 ABI):
+
+	struct {
+	  union  {
+	    float freg[8];
+	    double dreg[4];
+	  } float_regs;
+	  long	ireg[12];
+	};
+	*/
+
+	fst.q	f8,  0(sp)
+	fst.q	f12,16(sp) 
+	st.l	r16,32(sp)
+	st.l	r17,36(sp) 
+	st.l	r18,40(sp)
+	st.l	r19,44(sp)
+	st.l	r20,48(sp)
+	st.l	r21,52(sp)
+	st.l	r22,56(sp)
+	st.l	r23,60(sp)
+	st.l	r24,64(sp)
+	st.l	r25,68(sp)
+	st.l	r26,72(sp)
+	st.l	r27,76(sp)
+
+	adds	80,sp,r16  /* compute the address of the new
+			   va_list structure.  Put in into
+			   r16 so that it will be returned
+			   to the caller.  */
+
+	/* Initialize all fields of the new va_list structure.  This
+	   structure looks like:
+
+	typedef struct {
+	    unsigned long	ireg_used;
+	    unsigned long	freg_used;
+	    long	*reg_base;
+	    long	*mem_ptr;
+	} va_list;
+	*/
+
+	st.l	r0, 0(r16) /* nfixed */
+	st.l	r0, 4(r16) /* nfloating */
+	st.l    sp, 8(r16) /* __va_ctl points to __va_struct.  */
+	bri	r1	/* delayed return */
+	st.l	r28,12(r16) /* pointer to overflow args */
+#else /* not __PARAGON__ */
+	.text
+	.align	4
+
+	.globl	___builtin_saveregs
+___builtin_saveregs:
+	mov	sp,r30
+	andnot	0x0f,sp,sp
+	adds	-96,sp,sp  /* allocate sufficient space on the stack */
+
+/* Fill in the __va_struct.  */
+	st.l	r16, 0(sp) /* save integer regs (r16-r27) */
+	st.l	r17, 4(sp) /* int	fixed[12] */
+	st.l	r18, 8(sp)
+	st.l	r19,12(sp)
+	st.l	r20,16(sp)
+	st.l	r21,20(sp)
+	st.l	r22,24(sp)
+	st.l	r23,28(sp)
+	st.l	r24,32(sp)
+	st.l	r25,36(sp)
+	st.l	r26,40(sp)
+	st.l	r27,44(sp)
+
+	fst.q	f8, 48(sp) /* save floating regs (f8-f15) */
+	fst.q	f12,64(sp) /* int floating[8] */
+
+/* Fill in the __va_ctl.  */
+	st.l    sp, 80(sp) /* __va_ctl points to __va_struct.  */
+	st.l	r28,84(sp) /* pointer to more args */
+	st.l	r0, 88(sp) /* nfixed */
+	st.l	r0, 92(sp) /* nfloating */
+
+	adds	80,sp,r16  /* return address of the __va_ctl.  */
+	bri	r1
+	mov	r30,sp
+		/* recover stack and pass address to start 
+		   of data.  */
+#endif /* not __PARAGON__ */
+#endif /* not __svr4__ */

gcc/config/i860/x-sysv4

+# The svr4 reference port for the i860 contains an alloca.o routine
+# in /usr/ucblib/libucb.a, but we can't just try to get that by
+# setting CLIB to /usr/ucblib/libucb.a because (unfortunately)
+# there are a lot of other routines in libucb.a which are supposed
+# to be the Berkeley versions of library routines normally found in
+# libc.a and many of these Berkeley versions are badly broken.  Thus,
+# if we try to link programs with libucb.a before libc.a, those
+# programs tend to crash.
+
+# Also, the alloca() routine supplied in early version of svr4 for
+# the i860 is non-ABI compliant.  It doesn't keep the stack aligned
+# to a 16-byte boundary as the ABI requires.
+
+# More importantly however, even a fully ABI compliant alloca() routine
+# would fail to work correctly with some versions of the native svr4 C
+# compiler currently being distributed for the i860 (as of 1/29/92).
+# The problem is that the native C compiler generates non-ABI-compliant
+# function epilogues which cut back the stack (upon function exit) in
+# an incorrect manner.  Specifically, they cut back the stack by adding
+# the nominal *static* frame size (determined statically at compile-time)
+# to the stack pointer rather than setting the stack pointer based upon
+# the current value of the frame pointer (as called for in the i860 ABI).
+# This can cause serious trouble in cases where you repeatedly call a
+# routine which itself calls alloca().  In such cases, the stack will
+# grow continuously until you finally run out of swap space or exceed
+# the system's process size limit.  To avoid this problem (which can
+# arise when a stage1 gcc is being used to build a stage2 gcc) you
+# *must* link in the C language version of alloca() which is supplied
+# with gcc to your stage1 version of gcc.  The following definition
+# forces that to happen.
+
+ALLOCA=alloca.o
+
+# We build all stages *without* shared libraries because that may make
+# debugging the compiler easier (until there is a GDB which supports
+# both Dwarf *and* svr4 shared libraries).
+
+# Note that the native C compiler for the svr4 reference port on the
+# i860 recognizes a special -gg option.  Using that option causes *full*
+# Dwarf debugging information to be generated, whereas using only -g
+# causes only limited Dwarf debugging information to be generated.
+# (This is an undocumented feature of the native svr4 C compiler.)
+
+CCLIBFLAGS=-Bstatic -dn -gg