2013-02-06 Sandra Loosemore <sandra@codesourcery.com>

            Andrew Jenner <andrew@codesourcery.com>

	Based on patches from Altera Corporation.

	bfd/
	* Makefile.am (ALL_MACHINES): Add cpu-nios2.lo.
	(ALL_MACHINES_CFILES): Add cpu-nios2.c.
	(BFD_BACKENDS): Add elf32-nios2.lo.
	(BFD32_BACKENDS_CFILES): Add elf32-nios2.c.
	* Makefile.in: Regenerated.
	* configure.in: Add entries for bfd_elf32_bignios2_vec and
	bfd_elf32_littlenios2_vec.
	* configure: Regenerated.
	* config.bfd: Add cases for nios2.
	* archures.c (enum bfd_architecture): Add bfd_arch_nios2.
	(bfd_mach_nios2): Define.
	(bfd_nios2_arch): Declare.
	(bfd_archures_list): Add bfd_nios2_arch.
	* targets.c (bfd_elf32_bignios2_vec): Declare.
	(bfd_elf32_littlenios2_vec): Declare.
	(_bfd_target_vector): Add entries for bfd_elf32_bignios2_vec and
	bfd_elf32_littlenios2_vec.
	* elf-bfd.h (enum elf_target_id): Add NIOS2_ELF_DATA.
	* reloc.c (enum bfd_reloc_code_real): Add Nios II relocations.
	* bfd-in2.h: Regenerated.
	* libbfd.h: Regenerated.
	* cpu-nios2.c: New file.
	* elf32-nios2.c: New file.

	opcodes/
	* Makefile.am (TARGET_LIBOPCODES_CFILES): Add nios2-dis.c and
	nios2-opc.c.
	* Makefile.in: Regenerated.
	* configure.in: Add case for bfd_nios2_arch.
	* configure: Regenerated.
	* disassemble.c (ARCH_nios2): Define.
	(disassembler): Add case for bfd_arch_nios2.
	* nios2-dis.c: New file.
	* nios2-opc.c: New file.

	include/
	* dis-asm.h (print_insn_big_nios2): Declare.
	(print_insn_little_nios2): Declare.

	include/elf
	* nios2.h: New file.

	include/opcode/
	* nios2.h: New file.

	gas/
	* Makefile.am (TARGET_CPU_CFILES): Add config/tc-nios2.c.
	(TARGET_CPU_HFILES): Add config/tc-nios2.h.
	* Makefile.in: Regenerated.
	* configure.tgt: Add case for nios2*-linux*.
	* config/obj-elf.c: Conditionally include elf/nios2.h.
	* config/tc-nios2.c: New file.
	* config/tc-nios2.h: New file.
	* doc/Makefile.am (CPU_DOCS): Add c-nios2.texi.
	* doc/Makefile.in: Regenerated.
	* doc/all.texi: Set NIOSII.
	* doc/as.texinfo (Overview): Add Nios II options.
	(Machine Dependencies): Include c-nios2.texi.
	* doc/c-nios2.texi: New file.
	* NEWS: Note Altera Nios II support.

	gas/testsuite/
	* gas/nios2/add.d: New.
	* gas/nios2/add.s: New.
	* gas/nios2/align_fill.d: New.
	* gas/nios2/align_fill.s: New.
	* gas/nios2/align_text.d: New.
	* gas/nios2/align_text.s: New.
	* gas/nios2/and.d: New.
	* gas/nios2/and.s: New.
	* gas/nios2/branch.d: New.
	* gas/nios2/branch.s: New.
	* gas/nios2/break.d: New.
	* gas/nios2/break.s: New.
	* gas/nios2/bret.d: New.
	* gas/nios2/bret.s: New.
	* gas/nios2/cache.d: New.
	* gas/nios2/cache.s: New.
	* gas/nios2/call26.d: New.
	* gas/nios2/call26.s: New.
	* gas/nios2/call.d: New.
	* gas/nios2/call.s: New.
	* gas/nios2/cmp.d: New.
	* gas/nios2/cmp.s: New.
	* gas/nios2/comments.d: New.
	* gas/nios2/comments.s: New.
	* gas/nios2/complex.d: New.
	* gas/nios2/complex.s: New.
	* gas/nios2/ctl.d: New.
	* gas/nios2/ctl.s: New.
	* gas/nios2/custom.d: New.
	* gas/nios2/custom.s: New.
	* gas/nios2/etbt.d: New.
	* gas/nios2/etbt.s: New.
	* gas/nios2/flushda.d: New.
	* gas/nios2/flushda.s: New.
	* gas/nios2/illegal.l: New.
	* gas/nios2/illegal.s: New.
	* gas/nios2/jmp.d: New.
	* gas/nios2/jmp.s: New.
	* gas/nios2/ldb.d: New.
	* gas/nios2/ldb.s: New.
	* gas/nios2/ldh.d: New.
	* gas/nios2/ldh.s: New.
	* gas/nios2/ldw.d: New.
	* gas/nios2/ldw.s: New.
	* gas/nios2/lineseparator.d: New.
	* gas/nios2/lineseparator.s: New.
	* gas/nios2/mov.d: New.
	* gas/nios2/movia.d: New.
	* gas/nios2/movia.s: New.
	* gas/nios2/movi.d: New.
	* gas/nios2/movi.s: New.
	* gas/nios2/mov.s: New.
	* gas/nios2/mul.d: New.
	* gas/nios2/mul.s: New.
	* gas/nios2/nios2.exp: New.
	* gas/nios2/nor.d: New.
	* gas/nios2/nor.s: New.
	* gas/nios2/or.d: New.
	* gas/nios2/or.s: New.
	* gas/nios2/ret.d: New.
	* gas/nios2/ret.s: New.
	* gas/nios2/rol.d: New.
	* gas/nios2/rol.s: New.
	* gas/nios2/rotate.d: New.
	* gas/nios2/rotate.s: New.
	* gas/nios2/stb.d: New.
	* gas/nios2/stb.s: New.
	* gas/nios2/sth.d: New.
	* gas/nios2/sth.s: New.
	* gas/nios2/stw.d: New.
	* gas/nios2/stw.s: New.
	* gas/nios2/sub.d: New.
	* gas/nios2/sub.s: New.
	* gas/nios2/sync.d: New.
	* gas/nios2/sync.s: New.
	* gas/nios2/trap.d: New.
	* gas/nios2/trap.s: New.
	* gas/nios2/tret.d: New.
	* gas/nios2/tret.s: New.
	* gas/nios2/warn_noat.l: New.
	* gas/nios2/warn_noat.s: New.
	* gas/nios2/warn_nobreak.l: New.
	* gas/nios2/warn_nobreak.s: New.
	* gas/nios2/xor.d: New.
	* gas/nios2/xor.s: New.

	ld/
	* Makefile.am (enios2elf.c): New rule.
	* Makefile.in: Regenerated.
	* configure.tgt: Add case for nios2*-*-*.
	* emulparams/nios2elf.sh: New file.
	* NEWS: Note Altera Nios II support.

	ld/testsuite/
	* ld-nios2/emit-relocs-1a.s: New.
	* ld-nios2/emit-relocs-1b.s: New.
	* ld-nios2/emit-relocs-1.d: New.
	* ld-nios2/emit-relocs-1.ld: New.
	* ld-nios2/gprel.d: New.
	* ld-nios2/gprel.s: New.
	* ld-nios2/hilo16.d: New.
	* ld-nios2/hilo16.s: New.
	* ld-nios2/hilo16_symbol.s: New.
	* ld-nios2/imm5.d: New.
	* ld-nios2/imm5.s: New.
	* ld-nios2/imm5_symbol.s: New.
	* ld-nios2/nios2.exp: New.
	* ld-nios2/pcrel16.d: New.
	* ld-nios2/pcrel16_label.s: New.
	* ld-nios2/pcrel16.s: New.
	* ld-nios2/relax_callr.d: New.
	* ld-nios2/relax_callr.ld: New.
	* ld-nios2/relax_callr.s: New.
	* ld-nios2/relax_cjmp.d: New.
	* ld-nios2/relax_cjmp.s: New.
	* ld-nios2/relax_jmp.ld: New.
	* ld-nios2/relax_section.d: New.
	* ld-nios2/relax_section.s: New.
	* ld-nios2/relax_ujmp.d: New.
	* ld-nios2/relax_ujmp.s: New.
	* ld-nios2/reloc.d: New.
	* ld-nios2/reloc.s: New.
	* ld-nios2/reloc_symbol.s: New.
	* ld-nios2/s16.d: New.
	* ld-nios2/s16.s: New.
	* ld-nios2/s16_symbol.s: New.
	* ld-nios2/u16.d: New.
	* ld-nios2/u16.s: New.
	* ld-nios2/u16_symbol.s: New.
	* ld-elf/indirect.exp: Skip on targets that don't support
	-shared -fPIC.
	* ld-elfcomm/elfcomm.exp: Build with -G0 for nios2.
	* ld-plugin/lto.exp: Skip shared library tests on targets that
	don't support them.  Skip execution tests on non-native targets.

	binutils/
	* readelf.c: Include elf/nios2.h.
	(dump_relocations): Add case for EM_ALTERA_NIOS2.
	(get_nios2_dynamic_type): New.
	(get_dynamic_type): Add case for EM_ALTERA_NIOS2.
	(is_32bit_abs_reloc): Fix EM_ALTERA_NIOS2 case.
	(is_16bit_abs_reloc): Likewise.
	(is_none_reloc): Add EM_ALTERA_NIOS2 and EM_NIOS32 cases.
	* NEWS: Note Altera Nios II support.
	* MAINTAINERS: Add Nios II maintainers.

6 files changed, 632 insertions, 0 deletions

diff --git a/include/ChangeLog b/include/ChangeLog
index 3d093d733..b34099b6e 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,11 @@
+2013-02-06  Sandra Loosemore  <sandra@codesourcery.com>
+            Andrew Jenner <andrew@codesourcery.com>
+
+	Based on patches from Altera Corporation.
+
+	* dis-asm.h (print_insn_big_nios2): Declare.
+	(print_insn_little_nios2): Declare.
+
 2013-01-30  Kai Tietz  <ktietz@redhat.com>
 
 	PR other/54620
diff --git a/include/dis-asm.h b/include/dis-asm.h
index 43c26b166..78e9fc01a 100644
--- a/include/dis-asm.h
+++ b/include/dis-asm.h
@@ -226,6 +226,7 @@ extern int print_insn_avr		(bfd_vma, disassemble_info *);
 extern int print_insn_bfin		(bfd_vma, disassemble_info *);
 extern int print_insn_big_arm		(bfd_vma, disassemble_info *);
 extern int print_insn_big_mips		(bfd_vma, disassemble_info *);
+extern int print_insn_big_nios2		(bfd_vma, disassemble_info *);
 extern int print_insn_big_or32		(bfd_vma, disassemble_info *);
 extern int print_insn_big_powerpc	(bfd_vma, disassemble_info *);
 extern int print_insn_big_score         (bfd_vma, disassemble_info *);
@@ -253,6 +254,7 @@ extern int print_insn_ip2k		(bfd_vma, disassemble_info *);
 extern int print_insn_iq2000		(bfd_vma, disassemble_info *);
 extern int print_insn_little_arm	(bfd_vma, disassemble_info *);
 extern int print_insn_little_mips	(bfd_vma, disassemble_info *);
+extern int print_insn_little_nios2	(bfd_vma, disassemble_info *);
 extern int print_insn_little_or32	(bfd_vma, disassemble_info *);
 extern int print_insn_little_powerpc	(bfd_vma, disassemble_info *);
 extern int print_insn_little_score      (bfd_vma, disassemble_info *); 
diff --git a/include/elf/ChangeLog b/include/elf/ChangeLog
index 82e884ef2..780776727 100644
--- a/include/elf/ChangeLog
+++ b/include/elf/ChangeLog
@@ -1,3 +1,10 @@
+2013-02-06  Sandra Loosemore  <sandra@codesourcery.com>
+            Andrew Jenner <andrew@codesourcery.com>
+
+	Based on patches from Altera Corporation.
+
+	* nios2.h: New file.
+
 2013-01-24  Nick Clifton  <nickc@redhat.com>
 
 	* v850.h: Add support for e3v5 architecture.
diff --git a/include/elf/nios2.h b/include/elf/nios2.h
new file mode 100644
index 000000000..ff5947bf7
--- /dev/null
+++ b/include/elf/nios2.h
@@ -0,0 +1,91 @@
+/* Altera Nios II ELF support for BFD.
+   Copyright (C) 2012, 2013 Free Software Foundation, Inc.
+   Contributed by Nigel Gray (ngray@altera.com).
+   Contributed by Mentor Graphics, Inc.
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program 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 3 of the License, or
+   (at your option) any later version.
+
+   This program 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; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+
+/* This file holds definitions specific to the Altera Nios II ELF ABI.  Note
+   that most of this is not actually implemented by BFD.  */
+
+#ifndef _ELF_NIOS2_H
+#define _ELF_NIOS2_H
+
+#include "elf/reloc-macros.h"
+
+/* The order of these numbers must match the order in
+   the elf_nios2_howto_table_rel table for the lookup
+   function to work properly.  */
+
+START_RELOC_NUMBERS (elf_nios2_reloc_type)
+  RELOC_NUMBER (R_NIOS2_NONE,	  0)
+  RELOC_NUMBER (R_NIOS2_S16,	  1)
+  RELOC_NUMBER (R_NIOS2_U16,	  2)
+  RELOC_NUMBER (R_NIOS2_PCREL16, 3)
+  RELOC_NUMBER (R_NIOS2_CALL26,  4)
+  RELOC_NUMBER (R_NIOS2_IMM5,	  5)
+  RELOC_NUMBER (R_NIOS2_CACHE_OPX, 6)
+  RELOC_NUMBER (R_NIOS2_IMM6,	  7)
+  RELOC_NUMBER (R_NIOS2_IMM8,	  8)
+  RELOC_NUMBER (R_NIOS2_HI16,	  9)
+  RELOC_NUMBER (R_NIOS2_LO16,	  10)
+  RELOC_NUMBER (R_NIOS2_HIADJ16, 11)
+  RELOC_NUMBER (R_NIOS2_BFD_RELOC_32, 12)
+  RELOC_NUMBER (R_NIOS2_BFD_RELOC_16, 13)
+  RELOC_NUMBER (R_NIOS2_BFD_RELOC_8, 14)
+  RELOC_NUMBER (R_NIOS2_GPREL, 15)
+  RELOC_NUMBER (R_NIOS2_GNU_VTINHERIT, 16)
+  RELOC_NUMBER (R_NIOS2_GNU_VTENTRY, 17)
+  RELOC_NUMBER (R_NIOS2_UJMP, 18)
+  RELOC_NUMBER (R_NIOS2_CJMP, 19)
+  RELOC_NUMBER (R_NIOS2_CALLR, 20)
+  RELOC_NUMBER (R_NIOS2_ALIGN, 21)
+  RELOC_NUMBER (R_NIOS2_GOT16, 22)
+  RELOC_NUMBER (R_NIOS2_CALL16, 23)
+  RELOC_NUMBER (R_NIOS2_GOTOFF_LO, 24)
+  RELOC_NUMBER (R_NIOS2_GOTOFF_HA, 25)
+  RELOC_NUMBER (R_NIOS2_PCREL_LO, 26)
+  RELOC_NUMBER (R_NIOS2_PCREL_HA, 27)
+  RELOC_NUMBER (R_NIOS2_TLS_GD16, 28)
+  RELOC_NUMBER (R_NIOS2_TLS_LDM16, 29)
+  RELOC_NUMBER (R_NIOS2_TLS_LDO16, 30)
+  RELOC_NUMBER (R_NIOS2_TLS_IE16, 31)
+  RELOC_NUMBER (R_NIOS2_TLS_LE16, 32)
+  RELOC_NUMBER (R_NIOS2_TLS_DTPMOD, 33)
+  RELOC_NUMBER (R_NIOS2_TLS_DTPREL, 34)
+  RELOC_NUMBER (R_NIOS2_TLS_TPREL, 35)
+  RELOC_NUMBER (R_NIOS2_COPY, 36)
+  RELOC_NUMBER (R_NIOS2_GLOB_DAT, 37)
+  RELOC_NUMBER (R_NIOS2_JUMP_SLOT, 38)
+  RELOC_NUMBER (R_NIOS2_RELATIVE, 39)
+  RELOC_NUMBER (R_NIOS2_GOTOFF, 40)
+  RELOC_NUMBER (R_NIOS2_ILLEGAL, 41)
+END_RELOC_NUMBERS (R_NIOS2_maxext)
+
+/* Processor-specific section flags.  */
+
+/* This is used to mark gp-relative sections.  */
+#define SHF_NIOS2_GPREL	0x10000000
+
+/* Processor-specific dynamic array tags.  */
+
+/* Address of _gp.  */
+#define DT_NIOS2_GP 0x70000002
+
+#endif /* _ELF_NIOS2_H */
diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index ebe33dcaa..cef6986e1 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,10 @@
+2013-02-06  Sandra Loosemore  <sandra@codesourcery.com>
+            Andrew Jenner <andrew@codesourcery.com>
+
+	Based on patches from Altera Corporation.
+
+	* nios2.h: New file.
+
 2013-01-30  Yufeng Zhang  <yufeng.zhang@arm.com>
 
 	* aarch64.h (aarch64_op): Add OP_SXTL, OP_SXTL2, OP_UXTL and OP_UXTL2.
diff --git a/include/opcode/nios2.h b/include/opcode/nios2.h
new file mode 100644
index 000000000..85e702311
--- /dev/null
+++ b/include/opcode/nios2.h
@@ -0,0 +1,517 @@
+/* Nios II opcode list for GAS, the GNU assembler.
+   Copyright (C) 2012, 2013 Free Software Foundation, Inc.
+   Contributed by Nigel Gray (ngray@altera.com).
+   Contributed by Mentor Graphics, Inc.
+
+   This file is part of GAS, the GNU Assembler, and GDB, the GNU disassembler.
+
+   GAS/GDB 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 3, or (at your option)
+   any later version.
+
+   GAS/GDB 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 GAS or GDB; see the file COPYING3.  If not, write to
+   the Free Software Foundation, 51 Franklin Street - Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+#ifndef _NIOS2_H_
+#define _NIOS2_H_
+
+#include "bfd.h"
+
+/****************************************************************************
+ * This file contains structures, bit masks and shift counts used
+ * by the GNU toolchain to define the Nios II instruction set and
+ * access various opcode fields.
+ ****************************************************************************/
+
+/* Identify different overflow situations for error messages.  */
+enum overflow_type
+{
+  call_target_overflow = 0,
+  branch_target_overflow,
+  address_offset_overflow,
+  signed_immed16_overflow,
+  unsigned_immed16_overflow,
+  unsigned_immed5_overflow,
+  custom_opcode_overflow,
+  no_overflow
+};
+
+/* This structure holds information for a particular instruction. 
+
+   The args field is a string describing the operands.  The following
+   letters can appear in the args:
+     c - a 5-bit control register index or break opcode
+     d - a 5-bit destination register index
+     s - a 5-bit left source register index
+     t - a 5-bit right source register index
+     i - a 16-bit signed immediate
+     u - a 16-bit unsigned immediate
+     j - a 5-bit unsigned immediate
+     k - a 6-bit unsigned immediate
+     l - an 8-bit unsigned immediate
+     m - a 26-bit unsigned immediate
+   Literal ',', '(', and ')' characters may also appear in the args as
+   delimiters.
+
+   The pinfo field is INSN_MACRO for a macro.  Otherwise, it is a collection
+   of bits describing the instruction, notably any relevant hazard
+   information.
+
+   When assembling, the match field contains the opcode template, which
+   is modified by the arguments to produce the actual opcode
+   that is emitted.  If pinfo is INSN_MACRO, then this is 0.
+
+   If pinfo is INSN_MACRO, the mask field stores the macro identifier.
+   Otherwise this is a bit mask for the relevant portions of the opcode
+   when disassembling.  If the actual opcode anded with the match field
+   equals the opcode field, then we have found the correct instruction.  */
+
+struct nios2_opcode
+{
+  const char *name;		/* The name of the instruction.  */
+  const char *args;		/* A string describing the arguments for this 
+				   instruction.  */
+  const char *args_test;	/* Like args, but with an extra argument for 
+				   the expected opcode.  */
+  unsigned long num_args;	/* The number of arguments the instruction 
+				   takes.  */
+  unsigned long match;		/* The basic opcode for the instruction.  */
+  unsigned long mask;		/* Mask for the opcode field of the 
+				   instruction.  */
+  unsigned long pinfo;		/* Is this a real instruction or instruction 
+				   macro?  */
+  enum overflow_type overflow_msg;  /* Used to generate informative 
+				       message when fixup overflows.  */
+};
+
+/* This value is used in the nios2_opcode.pinfo field to indicate that the 
+   instruction is a macro or pseudo-op.  This requires special treatment by 
+   the assembler, and is used by the disassembler to determine whether to 
+   check for a nop.  */
+#define NIOS2_INSN_MACRO	0x80000000
+#define NIOS2_INSN_MACRO_MOV	0x80000001
+#define NIOS2_INSN_MACRO_MOVI	0x80000002
+#define NIOS2_INSN_MACRO_MOVIA	0x80000004
+
+#define NIOS2_INSN_RELAXABLE	0x40000000
+#define NIOS2_INSN_UBRANCH	0x00000010
+#define NIOS2_INSN_CBRANCH	0x00000020
+#define NIOS2_INSN_CALL		0x00000040
+
+#define NIOS2_INSN_ADDI		0x00000080
+#define NIOS2_INSN_ANDI		0x00000100
+#define NIOS2_INSN_ORI		0x00000200
+#define NIOS2_INSN_XORI		0x00000400
+
+
+/* Associates a register name ($6) with a 5-bit index (eg 6).  */
+struct nios2_reg
+{
+  const char *name;
+  const int index;
+};
+
+
+/* These are bit masks and shift counts for accessing the various
+   fields of a Nios II instruction.  */
+
+/* Macros for getting and setting an instruction field.  */
+#define GET_INSN_FIELD(X, i) \
+  (((i) & OP_MASK_##X) >> OP_SH_##X)
+#define SET_INSN_FIELD(X, i, j) \
+  ((i) = (((i) & ~OP_MASK_##X) | (((j) << OP_SH_##X) & OP_MASK_##X)))
+
+/* Instruction field definitions.  */
+#define IW_A_LSB 27
+#define IW_A_MSB 31
+#define IW_A_SZ 5
+#define IW_A_MASK 0x1f
+
+#define IW_B_LSB 22
+#define IW_B_MSB 26
+#define IW_B_SZ 5
+#define IW_B_MASK 0x1f
+
+#define IW_C_LSB 17
+#define IW_C_MSB 21
+#define IW_C_SZ 5
+#define IW_C_MASK 0x1f
+
+#define IW_IMM16_LSB 6
+#define IW_IMM16_MSB 21
+#define IW_IMM16_SZ 16
+#define IW_IMM16_MASK 0xffff
+
+#define IW_IMM26_LSB 6
+#define IW_IMM26_MSB 31
+#define IW_IMM26_SZ 26
+#define IW_IMM26_MASK 0x3ffffff
+
+#define IW_OP_LSB 0
+#define IW_OP_MSB 5
+#define IW_OP_SZ 6
+#define IW_OP_MASK 0x3f
+
+#define IW_OPX_LSB 11
+#define IW_OPX_MSB 16
+#define IW_OPX_SZ 6
+#define IW_OPX_MASK 0x3f
+
+#define IW_SHIFT_IMM5_LSB 6
+#define IW_SHIFT_IMM5_MSB 10
+#define IW_SHIFT_IMM5_SZ 5
+#define IW_SHIFT_IMM5_MASK 0x1f
+
+#define IW_CONTROL_REGNUM_LSB 6
+#define IW_CONTROL_REGNUM_MSB 9
+#define IW_CONTROL_REGNUM_SZ 4
+#define IW_CONTROL_REGNUM_MASK 0xf
+
+/* Operator mask and shift.  */
+#define OP_MASK_OP		(IW_OP_MASK << IW_OP_LSB)
+#define OP_SH_OP		IW_OP_LSB
+
+/* Masks and shifts for I-type instructions.  */
+#define OP_MASK_IOP		(IW_OP_MASK << IW_OP_LSB)
+#define OP_SH_IOP		IW_OP_LSB
+
+#define OP_MASK_IMM16		(IW_IMM16_MASK << IW_IMM16_LSB)
+#define OP_SH_IMM16		IW_IMM16_LSB
+
+#define OP_MASK_IRD		(IW_B_MASK << IW_B_LSB)
+#define OP_SH_IRD		IW_B_LSB /* The same as T for I-type.  */
+
+#define OP_MASK_IRT		(IW_B_MASK << IW_B_LSB)
+#define OP_SH_IRT		IW_B_LSB
+
+#define OP_MASK_IRS		(IW_A_MASK << IW_A_LSB)
+#define OP_SH_IRS		IW_A_LSB
+
+/* Masks and shifts for R-type instructions.  */
+#define OP_MASK_ROP		(IW_OP_MASK << IW_OP_LSB)
+#define OP_SH_ROP		IW_OP_LSB
+
+#define OP_MASK_ROPX		(IW_OPX_MASK << IW_OPX_LSB)
+#define OP_SH_ROPX		IW_OPX_LSB
+
+#define OP_MASK_RRD		(IW_C_MASK << IW_C_LSB)
+#define OP_SH_RRD		IW_C_LSB
+
+#define OP_MASK_RRT		(IW_B_MASK << IW_B_LSB)
+#define OP_SH_RRT		IW_B_LSB
+
+#define OP_MASK_RRS		(IW_A_MASK << IW_A_LSB)
+#define OP_SH_RRS		IW_A_LSB
+
+/* Masks and shifts for J-type instructions.  */
+#define OP_MASK_JOP		(IW_OP_MASK << IW_OP_LSB)
+#define OP_SH_JOP		IW_OP_LSB
+
+#define OP_MASK_IMM26		(IW_IMM26_MASK << IW_IMM26_LSB)
+#define OP_SH_IMM26		IW_IMM26_LSB
+
+/* Masks and shifts for CTL instructions.  */
+#define OP_MASK_RCTL	0x000007c0
+#define OP_SH_RCTL	6
+
+/* Break instruction imm5 field.  */
+#define OP_MASK_TRAP_IMM5 0x000007c0
+#define OP_SH_TRAP_IMM5	  6
+
+/* Instruction imm5 field.  */
+#define OP_MASK_IMM5		(IW_SHIFT_IMM5_MASK << IW_SHIFT_IMM5_LSB)
+#define OP_SH_IMM5		IW_SHIFT_IMM5_LSB
+
+/* Cache operation fields (type j,i(s)).  */
+#define OP_MASK_CACHE_OPX	(IW_B_MASK << IW_B_LSB)
+#define OP_SH_CACHE_OPX		IW_B_LSB
+#define OP_MASK_CACHE_RRS	(IW_A_MASK << IW_A_LSB)
+#define OP_SH_CACHE_RRS		IW_A_LSB
+
+/* Custom instruction masks.  */
+#define OP_MASK_CUSTOM_A	0x00010000
+#define OP_SH_CUSTOM_A		16
+
+#define OP_MASK_CUSTOM_B	0x00008000
+#define OP_SH_CUSTOM_B		15
+
+#define OP_MASK_CUSTOM_C	0x00004000
+#define OP_SH_CUSTOM_C		14
+
+#define OP_MASK_CUSTOM_N	0x00003fc0
+#define OP_SH_CUSTOM_N		6
+#define OP_MAX_CUSTOM_N		255
+
+/* OP instruction values. */
+#define OP_ADDI 4
+#define OP_ANDHI 44
+#define OP_ANDI 12
+#define OP_BEQ 38
+#define OP_BGE 14
+#define OP_BGEU 46
+#define OP_BLT 22
+#define OP_BLTU 54
+#define OP_BNE 30
+#define OP_BR 6
+#define OP_CALL 0
+#define OP_CMPEQI 32
+#define OP_CMPGEI 8
+#define OP_CMPGEUI 40
+#define OP_CMPLTI 16
+#define OP_CMPLTUI 48
+#define OP_CMPNEI 24
+#define OP_CUSTOM 50
+#define OP_FLUSHD 59
+#define OP_FLUSHDA 27
+#define OP_INITD 51
+#define OP_INITDA 19
+#define OP_JMPI 1
+#define OP_LDB 7
+#define OP_LDBIO 39
+#define OP_LDBU 3
+#define OP_LDBUIO 35
+#define OP_LDH 15
+#define OP_LDHIO 47
+#define OP_LDHU 11
+#define OP_LDHUIO 43
+#define OP_LDL 31
+#define OP_LDW 23
+#define OP_LDWIO 55
+#define OP_MULI 36
+#define OP_OPX 58
+#define OP_ORHI 52
+#define OP_ORI 20
+#define OP_STB 5
+#define OP_STBIO 37
+#define OP_STC 29
+#define OP_STH 13
+#define OP_STHIO 45
+#define OP_STW 21
+#define OP_STWIO 53
+#define OP_XORHI 60
+#define OP_XORI 28
+
+/* OPX instruction values.  */
+#define OPX_ADD 49
+#define OPX_AND 14
+#define OPX_BREAK 52
+#define OPX_BRET 9
+#define OPX_CALLR 29
+#define OPX_CMPEQ 32
+#define OPX_CMPGE 8
+#define OPX_CMPGEU 40
+#define OPX_CMPLT 16
+#define OPX_CMPLTU 48
+#define OPX_CMPNE 24
+#define OPX_CRST 62
+#define OPX_DIV 37
+#define OPX_DIVU 36
+#define OPX_ERET 1
+#define OPX_FLUSHI 12
+#define OPX_FLUSHP 4
+#define OPX_HBREAK 53
+#define OPX_INITI 41
+#define OPX_INTR 61
+#define OPX_JMP 13
+#define OPX_MUL 39
+#define OPX_MULXSS 31
+#define OPX_MULXSU 23
+#define OPX_MULXUU 7
+#define OPX_NEXTPC 28
+#define OPX_NOR 6
+#define OPX_OR 22
+#define OPX_RDCTL 38
+#define OPX_RET 5
+#define OPX_ROL 3
+#define OPX_ROLI 2
+#define OPX_ROR 11
+#define OPX_SLL 19
+#define OPX_SLLI 18
+#define OPX_SRA 59
+#define OPX_SRAI 58
+#define OPX_SRL 27
+#define OPX_SRLI 26
+#define OPX_SUB 57
+#define OPX_SYNC 54
+#define OPX_TRAP 45
+#define OPX_WRCTL 46
+#define OPX_XOR 30
+
+/* The following macros define the opcode matches for each
+   instruction code & OP_MASK_INST == OP_MATCH_INST.  */
+
+/* OP instruction matches.  */
+#define OP_MATCH_ADDI		OP_ADDI
+#define OP_MATCH_ANDHI		OP_ANDHI
+#define OP_MATCH_ANDI		OP_ANDI
+#define OP_MATCH_BEQ		OP_BEQ
+#define OP_MATCH_BGE		OP_BGE
+#define OP_MATCH_BGEU		OP_BGEU
+#define OP_MATCH_BLT		OP_BLT
+#define OP_MATCH_BLTU		OP_BLTU
+#define OP_MATCH_BNE		OP_BNE
+#define OP_MATCH_BR		OP_BR
+#define OP_MATCH_FLUSHD		OP_FLUSHD
+#define OP_MATCH_FLUSHDA	OP_FLUSHDA
+#define OP_MATCH_INITD		OP_INITD
+#define OP_MATCH_INITDA		OP_INITDA
+#define OP_MATCH_CALL		OP_CALL
+#define OP_MATCH_CMPEQI		OP_CMPEQI
+#define OP_MATCH_CMPGEI		OP_CMPGEI
+#define OP_MATCH_CMPGEUI	OP_CMPGEUI
+#define OP_MATCH_CMPLTI		OP_CMPLTI
+#define OP_MATCH_CMPLTUI	OP_CMPLTUI
+#define OP_MATCH_CMPNEI		OP_CMPNEI
+#define OP_MATCH_JMPI		OP_JMPI
+#define OP_MATCH_LDB		OP_LDB
+#define OP_MATCH_LDBIO		OP_LDBIO
+#define OP_MATCH_LDBU		OP_LDBU
+#define OP_MATCH_LDBUIO		OP_LDBUIO
+#define OP_MATCH_LDH		OP_LDH
+#define OP_MATCH_LDHIO		OP_LDHIO
+#define OP_MATCH_LDHU		OP_LDHU
+#define OP_MATCH_LDHUIO		OP_LDHUIO
+#define OP_MATCH_LDL		OP_LDL
+#define OP_MATCH_LDW		OP_LDW
+#define OP_MATCH_LDWIO		OP_LDWIO
+#define OP_MATCH_MULI		OP_MULI
+#define OP_MATCH_OPX		OP_OPX
+#define OP_MATCH_ORHI		OP_ORHI
+#define OP_MATCH_ORI		OP_ORI
+#define OP_MATCH_STB		OP_STB
+#define OP_MATCH_STBIO		OP_STBIO
+#define OP_MATCH_STC		OP_STC
+#define OP_MATCH_STH		OP_STH
+#define OP_MATCH_STHIO		OP_STHIO
+#define OP_MATCH_STW		OP_STW
+#define OP_MATCH_STWIO		OP_STWIO
+#define OP_MATCH_CUSTOM		OP_CUSTOM
+#define OP_MATCH_XORHI		OP_XORHI
+#define OP_MATCH_XORI		OP_XORI
+#define OP_MATCH_OPX		OP_OPX
+
+/* OPX instruction values.  */
+#define OPX_MATCH(code) ((code << IW_OPX_LSB) | OP_OPX)
+
+#define OP_MATCH_ADD		OPX_MATCH (OPX_ADD)
+#define OP_MATCH_AND		OPX_MATCH (OPX_AND)
+#define OP_MATCH_BREAK		((0x1e << 17) | OPX_MATCH (OPX_BREAK))
+#define OP_MATCH_BRET		(0xf0000000 | OPX_MATCH (OPX_BRET))
+#define OP_MATCH_CALLR		((0x1f << 17) | OPX_MATCH (OPX_CALLR))
+#define OP_MATCH_CMPEQ		OPX_MATCH (OPX_CMPEQ)
+#define OP_MATCH_CMPGE		OPX_MATCH (OPX_CMPGE)
+#define OP_MATCH_CMPGEU		OPX_MATCH (OPX_CMPGEU)
+#define OP_MATCH_CMPLT		OPX_MATCH (OPX_CMPLT)
+#define OP_MATCH_CMPLTU		OPX_MATCH (OPX_CMPLTU)
+#define OP_MATCH_CMPNE		OPX_MATCH (OPX_CMPNE)
+#define OP_MATCH_DIV		OPX_MATCH (OPX_DIV)
+#define OP_MATCH_DIVU		OPX_MATCH (OPX_DIVU)
+#define OP_MATCH_JMP		OPX_MATCH (OPX_JMP)
+#define OP_MATCH_MUL		OPX_MATCH (OPX_MUL)
+#define OP_MATCH_MULXSS		OPX_MATCH (OPX_MULXSS)
+#define OP_MATCH_MULXSU		OPX_MATCH (OPX_MULXSU)
+#define OP_MATCH_MULXUU		OPX_MATCH (OPX_MULXUU)
+#define OP_MATCH_NEXTPC		OPX_MATCH (OPX_NEXTPC)
+#define OP_MATCH_NOR		OPX_MATCH (OPX_NOR)
+#define OP_MATCH_OR		OPX_MATCH (OPX_OR)
+#define OP_MATCH_RDCTL		OPX_MATCH (OPX_RDCTL)
+#define OP_MATCH_RET		(0xf8000000 | OPX_MATCH (OPX_RET))
+#define OP_MATCH_ROL		OPX_MATCH (OPX_ROL)
+#define OP_MATCH_ROLI		OPX_MATCH (OPX_ROLI)
+#define OP_MATCH_ROR		OPX_MATCH (OPX_ROR)
+#define OP_MATCH_SLL		OPX_MATCH (OPX_SLL)
+#define OP_MATCH_SLLI		OPX_MATCH (OPX_SLLI)
+#define OP_MATCH_SRA		OPX_MATCH (OPX_SRA)
+#define OP_MATCH_SRAI		OPX_MATCH (OPX_SRAI)
+#define OP_MATCH_SRL		OPX_MATCH (OPX_SRL)
+#define OP_MATCH_SRLI		OPX_MATCH (OPX_SRLI)
+#define OP_MATCH_SUB		OPX_MATCH (OPX_SUB)
+#define OP_MATCH_SYNC		OPX_MATCH (OPX_SYNC)
+#define OP_MATCH_TRAP		((0x1d << 17) | OPX_MATCH (OPX_TRAP))
+#define OP_MATCH_ERET		(0xe8000000 | OPX_MATCH (OPX_ERET))
+#define OP_MATCH_WRCTL		OPX_MATCH (OPX_WRCTL)
+#define OP_MATCH_XOR		OPX_MATCH (OPX_XOR)
+#define OP_MATCH_FLUSHI		OPX_MATCH (OPX_FLUSHI)
+#define OP_MATCH_FLUSHP		OPX_MATCH (OPX_FLUSHP)
+#define OP_MATCH_INITI		OPX_MATCH (OPX_INITI)
+
+/* Some unusual op masks.  */
+#define OP_MASK_BREAK		((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_RRD \
+				  | OP_MASK_ROPX | OP_MASK_OP) \
+				 & 0xfffff03f)
+#define OP_MASK_CALLR		((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \
+				  | OP_MASK_OP))
+#define OP_MASK_JMP		((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \
+				  | OP_MASK_OP))
+#define OP_MASK_SYNC		((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \
+				  | OP_MASK_OP))
+#define OP_MASK_TRAP		((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_RRD \
+				  | OP_MASK_ROPX | OP_MASK_OP) \
+				 & 0xfffff83f)
+#define OP_MASK_WRCTL		((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \
+				  | OP_MASK_OP))	/*& 0xfffff83f */
+#define OP_MASK_NEXTPC		((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_ROPX \
+				  | OP_MASK_OP))
+#define OP_MASK_FLUSHI		((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \
+				  | OP_MASK_OP))
+#define OP_MASK_INITI		((OP_MASK_RRT | OP_MASK_RRD | OP_MASK_ROPX \
+				  | OP_MASK_OP))
+
+#define OP_MASK_ROLI		((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP))
+#define OP_MASK_SLLI		((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP))
+#define OP_MASK_SRAI		((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP))
+#define OP_MASK_SRLI		((OP_MASK_RRT | OP_MASK_ROPX | OP_MASK_OP))
+#define OP_MASK_RDCTL		((OP_MASK_RRS | OP_MASK_RRT | OP_MASK_ROPX \
+				  | OP_MASK_OP))	/*& 0xfffff83f */
+
+#ifndef OP_MASK
+#define OP_MASK				0xffffffff
+#endif
+
+/* These convenience macros to extract instruction fields are used by GDB.  */
+#define GET_IW_A(Iw) \
+    (((Iw) >> IW_A_LSB) & IW_A_MASK)
+#define GET_IW_B(Iw) \
+    (((Iw) >> IW_B_LSB) & IW_B_MASK)
+#define GET_IW_C(Iw) \
+    (((Iw) >> IW_C_LSB) & IW_C_MASK)
+#define GET_IW_CONTROL_REGNUM(Iw) \
+    (((Iw) >> IW_CONTROL_REGNUM_LSB) & IW_CONTROL_REGNUM_MASK)
+#define GET_IW_IMM16(Iw) \
+    (((Iw) >> IW_IMM16_LSB) & IW_IMM16_MASK)
+#define GET_IW_IMM26(Iw) \
+    (((Iw) >> IW_IMM26_LSB) & IW_IMM26_MASK)
+#define GET_IW_OP(Iw) \
+    (((Iw) >> IW_OP_LSB) & IW_OP_MASK)
+#define GET_IW_OPX(Iw) \
+    (((Iw) >> IW_OPX_LSB) & IW_OPX_MASK)
+
+/* These are the data structures we use to hold the instruction information.  */
+extern const struct nios2_opcode nios2_builtin_opcodes[];
+extern const int bfd_nios2_num_builtin_opcodes;
+extern struct nios2_opcode *nios2_opcodes;
+extern int bfd_nios2_num_opcodes;
+
+/* These are the data structures used to hold the register information.  */
+extern const struct nios2_reg nios2_builtin_regs[];
+extern struct nios2_reg *nios2_regs;
+extern const int nios2_num_builtin_regs;
+extern int nios2_num_regs;
+
+/* Machine-independent macro for number of opcodes.  */
+#define NUMOPCODES bfd_nios2_num_opcodes
+#define NUMREGISTERS nios2_num_regs;
+
+/* This is made extern so that the assembler can use it to find out
+   what instruction caused an error.  */
+extern const struct nios2_opcode *nios2_find_opcode_hash (unsigned long);
+
+#endif /* _NIOS2_H */