* arc.h (ARC_MACH_{BASE,HOST,GRAPHICS,AUDIO}): Define.

	(ARC_MACH_MASK, ARC_OPCODE_MACH, ARC_OPVAL_MACH): Define.
	(ARC_HAVE_MULT_SHIFT): Delete.
	(ARC_HAVE_MACH): Define.
	(struct arc_opcode): New field `flags'.
	(struct arc_operand_value): Ditto.
	(arc_opcode_supported): New function.
	(arc_opval_supported): Ditto.

1 files changed, 217 insertions, 0 deletions

diff --git a/include/opcode/arc.h b/include/opcode/arc.h
new file mode 100644
index 0000000..edc7f5c
--- /dev/null
+++ b/include/opcode/arc.h
@@ -0,0 +1,217 @@
+/* Opcode table for the ARC.
+   Copyright 1994, 1995 Free Software Foundation, Inc.
+   Contributed by Doug Evans (dje@cygnus.com).
+   
+   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 2, 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* List of the various cpu types.
+   The tables currently use bit masks to say whether the instruction or
+   whatever is supported by a particular cpu.  This lets us have one entry
+   apply to several cpus.
+   There may be more ARCs in the future, beyond the current project.  */
+
+/* The `base' cpu must be 0 (table entries are omitted for the base cpu).  */
+#define ARC_MACH_BASE 0
+#define ARC_MACH_HOST 1
+#define ARC_MACH_GRAPHICS 2
+#define ARC_MACH_AUDIO 4
+
+/* Mask of number of bits necessary to record cpu type.  */
+#define ARC_MACH_MASK 7
+
+/* Type to denote an ARC instruction (at least a 32 bit unsigned long).  */
+typedef unsigned long arc_insn;
+
+struct arc_opcode {
+  char *syntax;			/* syntax of insn */
+  unsigned long mask, value;	/* recognize instruction if (op&mask)==value */
+  int flags;			/* various flag bits */
+
+/* Values for `flags'.  */
+
+/* Return MACH number, given flag bits.  */
+#define ARC_OPCODE_MACH(bits) ((bits) & ARC_MACH_MASK)
+};
+
+struct arc_operand_value {
+  char *name;			/* eg: "eq" */
+  short value;			/* eg: 1 */
+  unsigned char type;		/* index into `arc_operands' */
+  unsigned char flags;		/* various flag bits */
+
+/* Values for `flags'.  */
+
+/* Return MACH number, given flag bits.  */
+#define ARC_OPVAL_MACH(bits) ((bits) & ARC_MACH_MASK)
+};
+
+struct arc_operand {
+  /* One of the insn format chars.  */
+  unsigned char fmt;
+
+  /* The number of bits in the operand (may be unused for a modifier).  */
+  unsigned char bits;
+
+  /* How far the operand is left shifted in the instruction, or
+     the modifier's flag bit (may be unused for a modifier.  */
+  unsigned char shift;
+
+  /* Various flag bits.  */
+  int flags;
+
+/* Values for `flags'.  */
+
+/* This operand is a suffix to the opcode.  */
+#define ARC_OPERAND_SUFFIX 1
+
+/* This operand is a relative branch displacement.  The disassembler
+   prints these symbolically if possible.  */
+#define ARC_OPERAND_RELATIVE 2
+
+/* This operand is an absolute branch address.  The disassembler
+   prints these symbolically if possible.  */
+#define ARC_OPERAND_ABSOLUTE 4
+
+/* This operand takes signed values.  */
+#define ARC_OPERAND_SIGNED 8
+
+/* This operand takes signed values, but also accepts a full positive
+   range of values.  That is, if bits is 16, it takes any value from
+   -0x8000 to 0xffff.  */
+#define ARC_OPERAND_SIGNOPT 0x10
+
+/* This operand should be regarded as a negative number for the
+   purposes of overflow checking (i.e., the normal most negative
+   number is disallowed and one more than the normal most positive
+   number is allowed).  This flag will only be set for a signed
+   operand.  */
+#define ARC_OPERAND_NEGATIVE 0x20
+
+/* This operand doesn't really exist.  The program uses these operands
+   in special ways.  */
+#define ARC_OPERAND_FAKE 0x40
+
+/* Modifier values.  */
+/* A dot is required before a suffix.  Eg: .le  */
+#define ARC_MOD_DOT 0x1000
+
+/* A normal register is allowed (not used, but here for completeness).  */
+#define ARC_MOD_REG 0x2000
+
+/* An auxiliary register name is expected.  */
+#define ARC_MOD_AUXREG 0x4000
+
+/* Sum of all ARC_MOD_XXX bits.  */
+#define ARC_MOD_BITS 0x7000
+
+/* Non-zero if the operand type is really a modifier.  */
+#define ARC_MOD_P(X) ((X) & ARC_MOD_BITS)
+
+  /* Insertion function.  This is used by the assembler.  To insert an
+     operand value into an instruction, check this field.
+
+     If it is NULL, execute
+         i |= (p & ((1 << o->bits) - 1)) << o->shift;
+     (I is the instruction which we are filling in, O is a pointer to
+     this structure, and OP is the opcode value; this assumes twos
+     complement arithmetic).
+
+     If this field is not NULL, then simply call it with the
+     instruction and the operand value.  It will return the new value
+     of the instruction.  If the ERRMSG argument is not NULL, then if
+     the operand value is illegal, *ERRMSG will be set to a warning
+     string (the operand will be inserted in any case).  If the
+     operand value is legal, *ERRMSG will be unchanged.
+
+     REG is non-NULL when inserting a register value.  */
+
+  arc_insn (*insert) PARAMS ((arc_insn insn,
+			      const struct arc_operand *operand, int mods,
+			      const struct arc_operand_value *reg, long value,
+			      const char **errmsg));
+
+  /* Extraction function.  This is used by the disassembler.  To
+     extract this operand type from an instruction, check this field.
+
+     If it is NULL, compute
+         op = ((i) >> o->shift) & ((1 << o->bits) - 1);
+	 if ((o->flags & ARC_OPERAND_SIGNED) != 0
+	     && (op & (1 << (o->bits - 1))) != 0)
+	   op -= 1 << o->bits;
+     (I is the instruction, O is a pointer to this structure, and OP
+     is the result; this assumes twos complement arithmetic).
+
+     If this field is not NULL, then simply call it with the
+     instruction value.  It will return the value of the operand.  If
+     the INVALID argument is not NULL, *INVALID will be set to
+     non-zero if this operand type can not actually be extracted from
+     this operand (i.e., the instruction does not match).  If the
+     operand is valid, *INVALID will not be changed.
+
+     INSN is a pointer to an array of two `arc_insn's.  The first element is
+     the insn, the second is the limm if present.
+
+     Operands that have a printable form like registers and suffixes have
+     their struct arc_operand_value pointer stored in OPVAL.  */
+
+  long (*extract) PARAMS ((arc_insn *insn,
+			   const struct arc_operand *operand,
+			   int mods, const struct arc_operand_value **opval,
+			   int *invalid));
+};
+
+/* Bits that say what version of cpu we have.
+   These should be passed to arc_init_opcode_tables.
+   At present, all there is is the cpu type.  */
+
+/* MACH number, given value passed to `arc_init_opcode_tables'.  */
+#define ARC_HAVE_MACH(bits) ((bits) & ARC_MACH_MASK)
+
+/* Special register values:  */
+#define ARC_REG_SHIMM_UPDATE 61
+#define ARC_REG_SHIMM 63
+#define ARC_REG_LIMM 62
+
+/* Non-zero if REG is a constant marker.  */
+#define ARC_REG_CONSTANT_P(REG) ((REG) >= 61)
+
+/* Positions and masks of various fields:  */
+#define ARC_SHIFT_REGA 21
+#define ARC_SHIFT_REGB 15
+#define ARC_SHIFT_REGC 9
+#define ARC_MASK_REG 63
+
+/* Non-zero if X will fit in a signed 9 bit field.  */
+#define ARC_SHIMM_CONST_P(x) ((long) (x) >= -256 && (long) (x) <= 255)
+
+extern const struct arc_operand arc_operands[];
+extern const int arc_operand_count;
+extern const struct arc_opcode arc_opcodes[];
+extern const int arc_opcodes_count;
+extern const struct arc_operand_value arc_suffixes[];
+extern const int arc_suffixes_count;
+extern const struct arc_operand_value arc_reg_names[];
+extern const int arc_reg_names_count;
+extern unsigned char arc_operand_map[];
+
+/* Utility fns in arc-opc.c.  */
+/* `arc_opcode_init_tables' must be called before `arc_xxx_supported'.  */
+void arc_opcode_init_tables PARAMS ((int));
+void arc_opcode_init_insert PARAMS ((void));
+void arc_opcode_init_extract PARAMS ((void));
+int arc_opcode_limm_p PARAMS ((long *));
+const struct arc_operand_value *arc_opcode_lookup_suffix PARAMS ((const struct arc_operand *type, int value));
+int arc_opcode_supported PARAMS ((const struct arc_opcode *));
+int arc_opval_supported PARAMS ((const struct arc_operand_value *));