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authorNick Clifton <nickc@redhat.com>2003-04-01 15:50:31 +0000
committerNick Clifton <nickc@redhat.com>2003-04-01 15:50:31 +0000
commite0001a05d2e4967ee86f4468cdc4fafea66b92d1 (patch)
tree4676b72e452f4dfc81e8d6646fb43f63a108da1b /include/xtensa-isa-internal.h
parentce0c72625ad0f6497718b4293572b2b6be711714 (diff)
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Add Xtensa port
Diffstat (limited to 'include/xtensa-isa-internal.h')
-rw-r--r--include/xtensa-isa-internal.h114
1 files changed, 114 insertions, 0 deletions
diff --git a/include/xtensa-isa-internal.h b/include/xtensa-isa-internal.h
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+/* Internal definitions for configurable Xtensa ISA support.
+ Copyright 2003 Free Software Foundation, 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* Use the statically-linked version for the GNU tools. */
+#define STATIC_LIBISA 1
+
+#define ISA_INTERFACE_VERSION 3
+
+struct config_struct
+{
+ char *param_name;
+ char *param_value;
+};
+
+/* Encode/decode function types for immediate operands. */
+typedef uint32 (*xtensa_immed_decode_fn) (uint32);
+typedef xtensa_encode_result (*xtensa_immed_encode_fn) (uint32 *);
+
+/* Field accessor function types. */
+typedef uint32 (*xtensa_get_field_fn) (const xtensa_insnbuf);
+typedef void (*xtensa_set_field_fn) (xtensa_insnbuf, uint32);
+
+/* PC-relative relocation function types. */
+typedef uint32 (*xtensa_do_reloc_fn) (uint32, uint32);
+typedef uint32 (*xtensa_undo_reloc_fn) (uint32, uint32);
+
+/* Instruction decode function type. */
+typedef int (*xtensa_insn_decode_fn) (const xtensa_insnbuf);
+
+/* Instruction encoding template function type (each of these functions
+ returns a constant template; they exist only to make it easier for the
+ TIE compiler to generate endian-independent DLLs). */
+typedef xtensa_insnbuf (*xtensa_encoding_template_fn) (void);
+
+
+typedef struct xtensa_operand_internal_struct
+{
+ char *operand_kind; /* e.g., "a", "f", "i", "l".... */
+ char inout; /* '<', '>', or '='. */
+ char isPCRelative; /* Is this a PC-relative offset? */
+ xtensa_get_field_fn get_field; /* Get encoded value of the field. */
+ xtensa_set_field_fn set_field; /* Set field with an encoded value. */
+ xtensa_immed_encode_fn encode; /* Encode the operand value. */
+ xtensa_immed_decode_fn decode; /* Decode the value from the field. */
+ xtensa_do_reloc_fn do_reloc; /* Perform a PC-relative relocation. */
+ xtensa_undo_reloc_fn undo_reloc; /* Undo a PC-relative relocation. */
+} xtensa_operand_internal;
+
+
+typedef struct xtensa_iclass_internal_struct
+{
+ int num_operands; /* Size of "operands" array. */
+ xtensa_operand_internal **operands; /* Array of operand structures. */
+} xtensa_iclass_internal;
+
+
+typedef struct xtensa_opcode_internal_struct
+{
+ const char *name; /* Opcode mnemonic. */
+ int length; /* Length in bytes of the insn. */
+ xtensa_encoding_template_fn template; /* Fn returning encoding template. */
+ xtensa_iclass_internal *iclass; /* Iclass for this opcode. */
+} xtensa_opcode_internal;
+
+
+typedef struct opname_lookup_entry_struct
+{
+ const char *key; /* Opcode mnemonic. */
+ xtensa_opcode opcode; /* Internal opcode number. */
+} opname_lookup_entry;
+
+
+typedef struct xtensa_isa_internal_struct
+{
+ int is_big_endian; /* Endianness. */
+ int insn_size; /* Maximum length in bytes. */
+ int insnbuf_size; /* Number of insnbuf_words. */
+ int num_opcodes; /* Total number for all modules. */
+ xtensa_opcode_internal **opcode_table;/* Indexed by internal opcode #. */
+ int num_modules; /* Number of modules (DLLs) loaded. */
+ int *module_opcode_base; /* Starting opcode # for each module. */
+ xtensa_insn_decode_fn *module_decode_fn; /* Decode fn for each module. */
+ opname_lookup_entry *opname_lookup_table; /* Lookup table for each module. */
+ struct config_struct *config; /* Table of configuration parameters. */
+ int has_density; /* Is density option available? */
+} xtensa_isa_internal;
+
+
+typedef struct xtensa_isa_module_struct
+{
+ const int (*get_num_opcodes_fn) (void);
+ xtensa_opcode_internal **(*get_opcodes_fn) (void);
+ int (*decode_insn_fn) (const xtensa_insnbuf);
+ struct config_struct *(*get_config_table_fn) (void);
+} xtensa_isa_module;
+
+extern xtensa_isa_module xtensa_isa_modules[];
+