Add MMIX support

2 files changed, 189 insertions, 0 deletions

diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 583f742c6c7..73dd9c65bde 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2001-10-30  Hans-Peter Nilsson  <hp@bitrange.com>
+
+	* mmix.h: New file.
+
 2001-10-18  Chris Demetriou  <cgd@broadcom.com>
 
 	* mips.h (OPCODE_IS_MEMBER): Add a no-op term to the end
diff --git a/include/opcode/mmix.h b/include/opcode/mmix.h
new file mode 100644
index 00000000000..825eb0e244b
--- /dev/null
+++ b/include/opcode/mmix.h
@@ -0,0 +1,185 @@
+/* mmix.h -- Header file for MMIX opcode table
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   Written by Hans-Peter Nilsson (hp@bitrange.com)
+
+This file is part of GDB, GAS, and the GNU binutils.
+
+GDB, GAS, and the GNU binutils are free software; you can redistribute
+them and/or modify them 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.
+
+GDB, GAS, and the GNU binutils are distributed in the hope that they
+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 file; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* We could have just a char*[] table indexed by the register number, but
+   that would not allow for synonyms.  The table is terminated with an
+   entry with a NULL name.  */
+struct mmix_spec_reg
+{
+  const char *name;
+  unsigned int number;
+};
+
+/* General indication of the type of instruction.  */
+enum mmix_insn_type
+ {
+   mmix_type_pseudo,
+   mmix_type_normal,
+   mmix_type_branch,
+   mmix_type_condbranch,
+   mmix_type_memaccess_octa,
+   mmix_type_memaccess_tetra,
+   mmix_type_memaccess_wyde,
+   mmix_type_memaccess_byte,
+   mmix_type_memaccess_block,
+   mmix_type_jsr
+ };
+
+/* Type of operands an instruction takes.  Use when parsing assembly code
+   and disassembling.  */
+enum mmix_operands_type
+ {
+   mmix_operands_none = 0,
+
+   /* All operands are registers: "$X,$Y,$Z".  */
+   mmix_operands_regs,
+
+   /* "$X,YZ", like SETH.  */
+   mmix_operands_reg_yz,
+
+   /* The regular "$X,$Y,$Z|Z".
+      The Z is optional; if only "$X,$Y" is given, then "$X,$Y,0" is
+      assumed.  */
+   mmix_operands_regs_z_opt,
+
+   /* The regular "$X,$Y,$Z|Z".  */
+   mmix_operands_regs_z,
+
+   /* "Address"; only JMP.  Zero operands allowed unless GNU syntax.  */
+   mmix_operands_jmp,
+
+   /* "$X|X,$Y,$Z|Z": PUSHGO; like "3", but X can be expressed as an
+      integer.  */
+   mmix_operands_pushgo,
+
+   /* Two registers or a register and a byte, like FLOT, possibly with
+      rounding: "$X,$Z|Z" or "$X,ROUND_MODE,$Z|Z".  */
+   mmix_operands_roundregs_z,
+
+   /* "X,YZ", POP.  Unless GNU syntax, zero or one operand is allowed.  */
+   mmix_operands_pop,
+
+   /* Two registers, possibly with rounding: "$X,$Z" or
+      "$X,ROUND_MODE,$Z".  */
+   mmix_operands_roundregs,
+
+   /* "XYZ", like SYNC.  */
+   mmix_operands_sync,
+
+   /* "X,$Y,$Z|Z", like SYNCD.  */
+   mmix_operands_x_regs_z,
+
+   /* "$X,Y,$Z|Z", like NEG and NEGU.  The Y field is optional, default 0.  */
+   mmix_operands_neg,
+
+   /* "$X,Address, like GETA or branches.  */
+   mmix_operands_regaddr,
+
+   /* "$X|X,Address, like PUSHJ.  */
+   mmix_operands_pushj,
+
+   /* "$X,spec_reg"; GET.  */
+   mmix_operands_get,
+
+   /* "spec_reg,$Z|Z"; PUT.  */
+   mmix_operands_put,
+
+   /* Two registers, "$X,$Y".  */
+   mmix_operands_set,
+
+   /* "$X,0"; SAVE.  */
+   mmix_operands_save,
+
+   /* "0,$Z"; UNSAVE. */
+   mmix_operands_unsave,
+
+   /* "X,Y,Z"; like SWYM or TRAP.  Zero (or 1 if GNU syntax) to three
+      operands, interpreted as 0; XYZ; X, YZ and X, Y, Z.  */
+   mmix_operands_xyz_opt,
+
+   /* Just "Z", like RESUME.  Unless GNU syntax, the operand can be omitted
+      and will then be assumed zero.  */
+   mmix_operands_resume,
+
+   /* These are specials to handle that pseudo-directives are specified
+      like ordinary insns when being mmixal-compatible.  They signify the
+      specific pseudo-directive rather than the operands type.  */
+
+   /* LOC.  */
+   mmix_operands_loc,
+
+   /* PREFIX.  */
+   mmix_operands_prefix,
+
+   /* BYTE.  */
+   mmix_operands_byte,
+
+   /* WYDE.  */
+   mmix_operands_wyde,
+
+   /* TETRA.  */
+   mmix_operands_tetra,
+
+   /* OCTA.  */
+   mmix_operands_octa,
+
+   /* LOCAL.  */
+   mmix_operands_local,
+
+   /* BSPEC.  */
+   mmix_operands_bspec,
+
+   /* ESPEC.  */
+   mmix_operands_espec,
+ };
+
+struct mmix_opcode
+ {
+   const char *name;
+   unsigned long match;
+   unsigned long lose;
+   enum mmix_operands_type operands;
+
+   /* This is used by the disassembly function.  */
+   enum mmix_insn_type type;
+ };
+
+/* Declare the actual tables.  */
+extern const struct mmix_opcode mmix_opcodes[];
+
+/* This one is terminated with an entry with a NULL name.  */
+extern const struct mmix_spec_reg mmix_spec_regs[];
+
+/* Some insn values we use when padding and synthesizing address loads.  */
+#define IMM_OFFSET_BIT 1
+#define COND_INV_BIT 0x8
+#define PRED_INV_BIT 0x10
+
+#define PUSHGO_INSN_BYTE 0xbe
+#define GO_INSN_BYTE 0x9e
+#define SETL_INSN_BYTE 0xe3
+#define INCML_INSN_BYTE 0xe6
+#define INCMH_INSN_BYTE 0xe5
+#define INCH_INSN_BYTE 0xe4
+#define SWYM_INSN_BYTE 0xfd
+
+/* We can have 256 - 32 (local registers) - 1 ($255 is not allocatable)
+   global registers.  */
+#define MAX_GREGS 223