Add Xtensa port

1 files changed, 142 insertions, 0 deletions

diff --git a/gas/config/xtensa-relax.h b/gas/config/xtensa-relax.h
new file mode 100644
index 00000000000..99bf77bfd8e
--- /dev/null
+++ b/gas/config/xtensa-relax.h
@@ -0,0 +1,142 @@
+/* Table of relaxations for Xtensa assembly.
+   Copyright 2003 Free Software Foundation, Inc.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS 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.
+
+   GAS 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; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 
+   MA 02111-1307, USA.  */
+
+#ifndef XTENSA_RELAX_H
+#define XTENSA_RELAX_H
+
+#include "xtensa-isa.h"
+
+
+/* Data structures for the table-driven relaxations for Xtensa processors.
+   See xtensa-relax.c for details.  */
+
+typedef struct transition_list TransitionList;
+typedef struct transition_table TransitionTable;
+typedef struct transition_rule TransitionRule;
+typedef struct precondition_list PreconditionList;
+typedef struct precondition Precondition;
+
+struct transition_table
+{
+  int num_opcodes;
+  TransitionList **table;	/* Possible transitions for each opcode.  */
+};
+
+struct transition_list
+{
+  TransitionRule *rule;
+  TransitionList *next;
+};
+
+struct precondition_list
+{
+  Precondition *precond;
+  PreconditionList *next;
+};
+
+
+/* Operand types and constraints on operands:  */
+
+typedef enum op_type OpType;
+typedef enum cmp_op CmpOp;
+
+enum op_type
+{
+  OP_CONSTANT,
+  OP_OPERAND,
+  OP_OPERAND_LOW8,		/* Sign-extended low 8 bits of immed.  */
+  OP_OPERAND_HI24S,		/* high 24 bits of immed,
+				   plus 0x100 if low 8 bits are signed.  */
+  OP_OPERAND_F32MINUS,		/* 32 - immed.  */
+  OP_LITERAL,
+  OP_LABEL
+};
+
+enum cmp_op
+{
+  OP_EQUAL,
+  OP_NOTEQUAL,
+};
+
+struct precondition
+{
+  CmpOp cmp;
+  int op_num;
+  OpType typ;			/* CONSTANT: op_data is a constant.
+				   OPERAND: operand op_num must equal op_data.
+				   Cannot be LITERAL or LABEL.  */
+  int op_data;
+};
+
+typedef struct build_op BuildOp;
+
+struct build_op
+{
+  int op_num;
+  OpType typ;
+  unsigned op_data;		/* CONSTANT: op_data is the value to encode.
+				   OPERAND: op_data is the field in the
+				   source instruction to take the value from
+				   and encode in the op_num field here.
+				   LITERAL or LABEL: op_data is the ordinal
+				   that identifies the appropriate one, i.e.,
+				   there can be more than one literal or
+				   label in an expansion.  */
+  BuildOp *next;
+};
+
+typedef struct build_instr BuildInstr;
+typedef enum instr_type InstrType;
+
+enum instr_type
+{
+  INSTR_INSTR,
+  INSTR_LITERAL_DEF,
+  INSTR_LABEL_DEF
+};
+
+struct build_instr
+{
+  InstrType typ;
+  unsigned id;			/* LITERAL_DEF or LABEL_DEF: an ordinal to
+				   identify which one.  */
+  xtensa_opcode opcode;		/* unused for LITERAL_DEF or LABEL_DEF.  */
+  BuildOp *ops;
+  BuildInstr *next;
+};
+
+struct transition_rule
+{
+  xtensa_opcode opcode;
+  PreconditionList *conditions;
+  BuildInstr *to_instr;
+};
+
+extern TransitionTable *xg_build_simplify_table
+  PARAMS ((void));
+extern TransitionTable *xg_build_widen_table
+  PARAMS ((void));
+
+extern bfd_boolean xg_has_userdef_op_fn
+  PARAMS ((OpType));
+extern long xg_apply_userdef_op_fn
+  PARAMS ((OpType, long));
+
+#endif /* !XTENSA_RELAX_H */