/* Header file for targets using CGEN: Cpu tools GENerator.
-Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of GDB, the GNU debugger, and the GNU Binutils.
#ifndef CGEN_H
#define CGEN_H
-/* Prepend the arch name, defined in <arch>-opc.h, and _cgen_ to symbol S.
+/* ??? This file requires bfd.h but only to get bfd_vma.
+ Seems like an awful lot to require just to get such a fundamental type.
+ Perhaps the definition of bfd_vma can be moved outside of bfd.h.
+ Or perhaps one could duplicate its definition in another file.
+ Until such time, this file conditionally compiles definitions that require
+ bfd_vma using BFD_VERSION. */
+
+/* Enums must be defined before they can be used.
+ Allow them to be used in struct definitions, even though the enum must
+ be defined elsewhere.
+ If CGEN_ARCH isn't defined, this file is being included by something other
+ than <arch>-desc.h. */
+
+/* Prepend the arch name, defined in <arch>-desc.h, and _cgen_ to symbol S.
The lack of spaces in the arg list is important for non-stdc systems.
- This file is included by <arch>-opc.h.
- It can be included independently of <arch>-opc.h, in which case the arch
+ This file is included by <arch>-desc.h.
+ It can be included independently of <arch>-desc.h, in which case the arch
dependent portions will be declared as "unknown_cgen_foo". */
#ifndef CGEN_SYM
/* The assembler syntax is made up of expressions (duh...).
At the lowest level the values are mnemonics, register names, numbers, etc.
Above that are subexpressions, if any (an example might be the
- "effective address" in m68k cpus). At the second highest level are the
- insns themselves. Above that are pseudo-insns, synthetic insns, and macros,
- if any.
-*/
+ "effective address" in m68k cpus). Subexpressions are wip.
+ At the second highest level are the insns themselves. Above that are
+ pseudo-insns, synthetic insns, and macros, if any. */
\f
/* Lots of cpu's have a fixed insn size, or one which rarely changes,
and it's generally easier to handle these by treating the insn as an
integer type, rather than an array of characters. So we allow targets
- to control this. */
+ to control this. When an integer type the value is in host byte order,
+ when an array of characters the value is in target byte order. */
-#ifdef CGEN_INT_INSN
-typedef unsigned int cgen_insn_t;
+typedef unsigned int CGEN_INSN_INT;
+#if CGEN_INT_INSN_P
+typedef CGEN_INSN_INT CGEN_INSN_BYTES;
+typedef CGEN_INSN_INT *CGEN_INSN_BYTES_PTR;
#else
-typedef char * cgen_insn_t;
+typedef unsigned char *CGEN_INSN_BYTES;
+typedef unsigned char *CGEN_INSN_BYTES_PTR;
#endif
#ifdef __GNUC__
-#define CGEN_INLINE inline
+#define CGEN_INLINE __inline__
#else
#define CGEN_INLINE
#endif
CGEN_ENDIAN_BIG
};
-/* Version information. */
-extern const int cgen_version_major;
-extern const int cgen_version_minor;
-extern const int cgen_version_fixlevel;
-
/* Forward decl. */
+
typedef struct cgen_insn CGEN_INSN;
+
+/* Opaque pointer version for use by external world. */
+
+typedef struct cgen_cpu_desc *CGEN_CPU_DESC;
\f
/* Attributes.
- Attributes are used to describe various random things. */
+ Attributes are used to describe various random things associated with
+ an object (ifield, hardware, operand, insn, whatever) and are specified
+ as name/value pairs.
+ Integer attributes computed at compile time are currently all that's
+ supported, though adding string attributes and run-time computation is
+ straightforward. Integer attribute values are always host int's
+ (signed or unsigned). For portability, this means 32 bits.
+ Integer attributes are further categorized as boolean, bitset, integer,
+ and enum types. Boolean attributes appear frequently enough that they're
+ recorded in one host int. This limits the maximum number of boolean
+ attributes to 32, though that's a *lot* of attributes. */
+
+/* Type of attribute values. */
+
+typedef int CGEN_ATTR_VALUE_TYPE;
/* Struct to record attribute information. */
+
typedef struct
{
- unsigned char num_nonbools;
+ /* Boolean attributes. */
unsigned int bool;
- unsigned int nonbool[1];
+ /* Non-boolean integer attributes. */
+ CGEN_ATTR_VALUE_TYPE nonbool[1];
} CGEN_ATTR;
/* Define a structure member for attributes with N non-boolean entries.
- The attributes are sorted so that the non-boolean ones come first.
- num_nonbools: count of nonboolean attributes
- bool: values of boolean attributes
- nonbool: values of non-boolean attributes
- There is a maximum of 32 attributes total. */
+ There is no maximum number of non-boolean attributes.
+ There is a maximum of 32 boolean attributes (since they are all recorded
+ in one host int). */
+
#define CGEN_ATTR_TYPE(n) \
-struct { unsigned char num_nonbools; \
- unsigned int bool; \
- unsigned int nonbool[(n) ? (n) : 1]; }
+struct { unsigned int bool; \
+ CGEN_ATTR_VALUE_TYPE nonbool[(n) ? (n) : 1]; }
+
+/* Return the boolean attributes. */
+
+#define CGEN_ATTR_BOOLS(a) ((a)->bool)
+
+/* Non-boolean attribute numbers are offset by this much. */
+
+#define CGEN_ATTR_NBOOL_OFFSET 32
+
+/* Given a boolean attribute number, return its mask. */
-/* Given an attribute number, return its mask. */
#define CGEN_ATTR_MASK(attr) (1 << (attr))
/* Return the value of boolean attribute ATTR in ATTRS. */
-#define CGEN_BOOL_ATTR(attrs, attr) \
-((CGEN_ATTR_MASK (attr) & (attrs)) != 0)
+
+#define CGEN_BOOL_ATTR(attrs, attr) ((CGEN_ATTR_MASK (attr) & (attrs)) != 0)
/* Return value of attribute ATTR in ATTR_TABLE for OBJ.
- OBJ is a pointer to the entity that has the attributes.
- It's not used at present but is reserved for future purposes. */
+ OBJ is a pointer to the entity that has the attributes
+ (??? not used at present but is reserved for future purposes - eventually
+ the goal is to allow recording attributes in source form and computing
+ them lazily at runtime, not sure of the details yet). */
+
#define CGEN_ATTR_VALUE(obj, attr_table, attr) \
-((unsigned int) (attr) < (attr_table)->num_nonbools \
- ? ((attr_table)->nonbool[attr]) \
- : (((attr_table)->bool & (1 << (attr))) != 0))
+((unsigned int) (attr) < CGEN_ATTR_NBOOL_OFFSET \
+ ? ((CGEN_ATTR_BOOLS (attr_table) & CGEN_ATTR_MASK (attr)) != 0) \
+ : ((attr_table)->nonbool[(attr) - CGEN_ATTR_NBOOL_OFFSET]))
/* Attribute name/value tables.
- These are used to assist parsing of descriptions at runtime. */
+ These are used to assist parsing of descriptions at run-time. */
typedef struct
{
const char * name;
- int value;
+ CGEN_ATTR_VALUE_TYPE value;
} CGEN_ATTR_ENTRY;
-/* For each domain (ifld,operand,insn), list of attributes. */
+/* For each domain (ifld,hw,operand,insn), list of attributes. */
typedef struct
{
const char * name;
- /* NULL for boolean attributes. */
+ const CGEN_ATTR_ENTRY * dfault;
const CGEN_ATTR_ENTRY * vals;
} CGEN_ATTR_TABLE;
\f
+/* Instruction set variants. */
+
+typedef struct {
+ const char *name;
+
+ /* Default instruction size (in bits).
+ This is used by the assembler when it encounters an unknown insn. */
+ unsigned int default_insn_bitsize;
+
+ /* Base instruction size (in bits).
+ For non-LIW cpus this is generally the length of the smallest insn.
+ For LIW cpus its wip (work-in-progress). For the m32r its 32. */
+ unsigned int base_insn_bitsize;
+
+ /* Minimum/maximum instruction size (in bits). */
+ unsigned int min_insn_bitsize;
+ unsigned int max_insn_bitsize;
+} CGEN_ISA;
+
+/* Machine variants. */
+
+typedef struct {
+ const char *name;
+ /* The argument to bfd_arch_info->scan. */
+ const char *bfd_name;
+ /* one of enum mach_attr */
+ int num;
+} CGEN_MACH;
+\f
/* Parse result (also extraction result).
The result of parsing an insn is stored here.
if it ever gets inlined. On architectures where insns all have the same
size, may wish to detect that and make this macro a constant - to allow
further optimizations. */
+
#define CGEN_FIELDS_BITSIZE(fields) ((fields)->length)
\f
+/* Extraction support for variable length insn sets. */
+
+/* When disassembling we don't know the number of bytes to read at the start.
+ So the first CGEN_BASE_INSN_SIZE bytes are read at the start and the rest
+ are read when needed. This struct controls this. It is basically the
+ disassemble_info stuff, except that we provide a cache for values already
+ read (since bytes can typically be read several times to fetch multiple
+ operands that may be in them), and that extraction of fields is needed
+ in contexts other than disassembly. */
+
+typedef struct {
+ /* A pointer to the disassemble_info struct.
+ We don't require dis-asm.h so we use PTR for the type here.
+ If NULL, BYTES is full of valid data (VALID == -1). */
+ PTR dis_info;
+ /* Points to a working buffer of sufficient size. */
+ unsigned char *insn_bytes;
+ /* Mask of bytes that are valid in INSN_BYTES. */
+ unsigned int valid;
+} CGEN_EXTRACT_INFO;
+\f
/* Associated with each insn or expression is a set of "handlers" for
performing operations like parsing, printing, etc. These require a bfd_vma
value to be passed around but we don't want all applications to need bfd.h.
So this stuff is only provided if bfd.h has been included. */
-#ifdef BFD_VERSION
-
/* Parse handler.
- The first argument is a pointer to a struct describing the insn being
- parsed.
- The second argument is a pointer to a pointer to the text being parsed.
- The third argument is a pointer to a cgen_fields struct
- in which the results are placed.
- If the expression is successfully parsed, the pointer to the text is
- updated. If not it is left alone.
+ CD is a cpu table descriptor.
+ INSN is a pointer to a struct describing the insn being parsed.
+ STRP is a pointer to a pointer to the text being parsed.
+ FIELDS is a pointer to a cgen_fields struct in which the results are placed.
+ If the expression is successfully parsed, *STRP is updated.
+ If not it is left alone.
The result is NULL if success or an error message. */
-typedef const char * (cgen_parse_fn) PARAMS ((const struct cgen_insn *,
- const char **,
- CGEN_FIELDS *));
-
-/* Print handler.
- The first argument is a pointer to the disassembly info.
- Eg: disassemble_info. It's defined as `PTR' so this file can be included
- without dis-asm.h.
- The second argument is a pointer to a struct describing the insn being
- printed.
- The third argument is a pointer to a cgen_fields struct.
- The fourth argument is the pc value of the insn.
- The fifth argument is the length of the insn, in bytes. */
-typedef void (cgen_print_fn) PARAMS ((PTR, const struct cgen_insn *,
- CGEN_FIELDS *, bfd_vma, int));
+typedef const char * (cgen_parse_fn)
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *insn_,
+ const char **strp_, CGEN_FIELDS *fields_));
/* Insert handler.
- The first argument is a pointer to a struct describing the insn being
- parsed.
- The second argument is a pointer to a cgen_fields struct
- from which the values are fetched.
- The third argument is a pointer to a buffer in which to place the insn.
- The fourth argument is the pc value of the insn.
+ CD is a cpu table descriptor.
+ INSN is a pointer to a struct describing the insn being parsed.
+ FIELDS is a pointer to a cgen_fields struct from which the values
+ are fetched.
+ INSNP is a pointer to a buffer in which to place the insn.
+ PC is the pc value of the insn.
The result is an error message or NULL if success. */
-typedef const char * (cgen_insert_fn) PARAMS ((const struct cgen_insn *,
- CGEN_FIELDS *, cgen_insn_t *,
- bfd_vma));
+
+#ifdef BFD_VERSION
+typedef const char * (cgen_insert_fn)
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *insn_,
+ CGEN_FIELDS *fields_, CGEN_INSN_BYTES_PTR insnp_,
+ bfd_vma pc_));
+#else
+typedef const char * (cgen_insert_fn) ();
+#endif
/* Extract handler.
- The first argument is a pointer to a struct describing the insn being
- parsed.
+ CD is a cpu table descriptor.
+ INSN is a pointer to a struct describing the insn being parsed.
The second argument is a pointer to a struct controlling extraction
(only used for variable length insns).
- The third argument is the first CGEN_BASE_INSN_SIZE bytes.
- The fourth argument is a pointer to a cgen_fields struct
- in which the results are placed.
- The fifth argument is the pc value of the insn.
- The result is the length of the insn or zero if not recognized. */
-typedef int (cgen_extract_fn) PARAMS ((const struct cgen_insn *,
- void *, cgen_insn_t,
- CGEN_FIELDS *, bfd_vma));
-
-/* The `parse' and `insert' fields are indices into these tables.
- The elements are pointer to specialized handler functions.
- Element 0 is special, it means use the default handler. */
-extern cgen_parse_fn * CGEN_SYM (parse_handlers) [];
-#define CGEN_PARSE_FN(x) (CGEN_SYM (parse_handlers)[(x)->base.parse])
-extern cgen_insert_fn * CGEN_SYM (insert_handlers) [];
-#define CGEN_INSERT_FN(x) (CGEN_SYM (insert_handlers)[(x)->base.insert])
-
-/* Likewise for the `extract' and `print' fields. */
-extern cgen_extract_fn * CGEN_SYM (extract_handlers) [];
-#define CGEN_EXTRACT_FN(x) (CGEN_SYM (extract_handlers)[(x)->base.extract])
-extern cgen_print_fn * CGEN_SYM (print_handlers) [];
-#define CGEN_PRINT_FN(x) (CGEN_SYM (print_handlers)[(x)->base.print])
-
-/* Default insn parser, printer. */
-extern cgen_parse_fn CGEN_SYM (parse_insn);
-extern cgen_insert_fn CGEN_SYM (insert_insn);
-extern cgen_extract_fn CGEN_SYM (extract_insn);
-extern cgen_print_fn CGEN_SYM (print_insn);
-
-#endif /* BFD_VERSION */
-\f
-/* Base class of parser/printer.
- (Don't read too much into the use of the phrase "base class".
- It's a name I'm using to organize my thoughts.)
+ EX_INFO is a pointer to a struct for controlling reading of further
+ bytes for the insn.
+ BASE_INSN is the first CGEN_BASE_INSN_SIZE bytes (host order).
+ FIELDS is a pointer to a cgen_fields struct in which the results are placed.
+ PC is the pc value of the insn.
+ The result is the length of the insn in bits or zero if not recognized. */
- Instructions and expressions all share this data in common.
- It's a collection of the common elements needed to parse, insert, extract,
- and print each of them. */
+#ifdef BFD_VERSION
+typedef int (cgen_extract_fn)
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *insn_,
+ CGEN_EXTRACT_INFO *ex_info_, CGEN_INSN_INT base_insn_,
+ CGEN_FIELDS *fields_, bfd_vma pc_));
+#else
+typedef int (cgen_extract_fn) ();
+#endif
-struct cgen_base
+/* Print handler.
+ CD is a cpu table descriptor.
+ INFO is a pointer to the disassembly info.
+ Eg: disassemble_info. It's defined as `PTR' so this file can be included
+ without dis-asm.h.
+ INSN is a pointer to a struct describing the insn being printed.
+ FIELDS is a pointer to a cgen_fields struct.
+ PC is the pc value of the insn.
+ LEN is the length of the insn, in bits. */
+
+#ifdef BFD_VERSION
+typedef void (cgen_print_fn)
+ PARAMS ((CGEN_CPU_DESC, PTR info_, const CGEN_INSN *insn_,
+ CGEN_FIELDS *fields_, bfd_vma pc_, int len_));
+#else
+typedef void (cgen_print_fn) ();
+#endif
+
+/* Parse/insert/extract/print handlers.
+
+ Indices into the handler tables.
+ We could use pointers here instead, but 90% of them are generally identical
+ and that's a lot of redundant data. Making these unsigned char indices
+ into tables of pointers saves a bit of space.
+ Using indices also keeps assembler code out of the disassembler and
+ vice versa. */
+
+struct cgen_opcode_handler
{
- /* Indices into the handler tables.
- We could use pointers here instead, but in the case of the insn table,
- 90% of them would be identical and that's a lot of redundant data.
- 0 means use the default (what the default is is up to the code).
- Using indices also keeps assembler code out of the disassembler and
- vice versa. */
unsigned char parse, insert, extract, print;
};
\f
Not that one would necessarily want to do that but rather that it helps
keep a clean interface. The interface will obviously be slanted towards
GAS, but at least it's a start.
- ??? Note that one possible use of the assembler besides GAS is GDB.
+ ??? Note that one possible user of the assembler besides GAS is GDB.
Parsing is controlled by the assembler which calls
CGEN_SYM (assemble_insn). If it can parse and build the entire insn
it doesn't call back to the assembler. If it needs/wants to call back
- to the assembler, (*cgen_parse_operand_fn) is called which can either
+ to the assembler, cgen_parse_operand_fn is called which can either
- return a number to be inserted in the insn
- return a "register" value to be inserted
The parsed value is stored in the bfd_vma *. */
/* Values for indicating what the caller wants. */
+
enum cgen_parse_operand_type
{
CGEN_PARSE_OPERAND_INIT,
};
/* Values for indicating what was parsed. */
+
enum cgen_parse_operand_result
{
CGEN_PARSE_OPERAND_RESULT_NUMBER,
};
#ifdef BFD_VERSION /* Don't require bfd.h unnecessarily. */
-extern const char * (*cgen_parse_operand_fn)
- PARAMS ((enum cgen_parse_operand_type, const char **, int, int,
+typedef const char * (cgen_parse_operand_fn)
+ PARAMS ((CGEN_CPU_DESC,
+ enum cgen_parse_operand_type, const char **, int, int,
enum cgen_parse_operand_result *, bfd_vma *));
+#else
+typedef const char * (cgen_parse_operand_fn) ();
#endif
+/* Set the cgen_parse_operand_fn callback. */
+
+extern void cgen_set_parse_operand_fn
+ PARAMS ((CGEN_CPU_DESC, cgen_parse_operand_fn));
+
/* Called before trying to match a table entry with the insn. */
-extern void cgen_init_parse_operand PARAMS ((void));
-/* The result is an error message or NULL for success.
- The parsed value is stored in the bfd_vma *. */
-#ifdef BFD_VERSION /* Don't require bfd.h unnecessarily. */
-extern const char * cgen_parse_operand
- PARAMS ((enum cgen_parse_operand_type,
- const char **, int, int,
- enum cgen_parse_operand_result *,
- bfd_vma *));
-#endif
+extern void cgen_init_parse_operand PARAMS ((CGEN_CPU_DESC));
\f
/* Operand values (keywords, integers, symbols, etc.) */
enum cgen_asm_type
{
- CGEN_ASM_KEYWORD, CGEN_ASM_MAX
+ CGEN_ASM_NONE, CGEN_ASM_KEYWORD, CGEN_ASM_MAX
};
+#ifndef CGEN_ARCH
+enum cgen_hw_type { CGEN_HW_MAX };
+#endif
+
/* List of hardware elements. */
-typedef struct cgen_hw_entry
+typedef struct
{
- /* The type of this entry, one of `enum hw_type'.
- This is an int and not the enum as the latter may not be declared yet. */
- int type;
- const struct cgen_hw_entry * next;
- char * name;
+ char *name;
+ enum cgen_hw_type type;
+ /* There is currently no example where both index specs and value specs
+ are required, so for now both are clumped under "asm_data". */
enum cgen_asm_type asm_type;
PTR asm_data;
+#ifndef CGEN_HW_NBOOL_ATTRS
+#define CGEN_HW_NBOOL_ATTRS 1
+#endif
+ CGEN_ATTR_TYPE (CGEN_HW_NBOOL_ATTRS) attrs;
+#define CGEN_HW_ATTRS(hw) (&(hw)->attrs)
} CGEN_HW_ENTRY;
-extern const CGEN_HW_ENTRY * cgen_hw_lookup_by_name PARAMS ((const char *));
-extern const CGEN_HW_ENTRY * cgen_hw_lookup_by_num PARAMS ((int));
+/* Return value of attribute ATTR in HW. */
+
+#define CGEN_HW_ATTR_VALUE(hw, attr) \
+CGEN_ATTR_VALUE ((hw), CGEN_HW_ATTRS (hw), (attr))
+
+/* Table of hardware elements for selected mach, computed at runtime.
+ enum cgen_hw_type is an index into this table (specifically `entries'). */
+
+typedef struct {
+ /* Pointer to null terminated table of all compiled in entries. */
+ const CGEN_HW_ENTRY *init_entries;
+ unsigned int entry_size; /* since the attribute member is variable sized */
+ /* Array of all entries, initial and run-time added. */
+ const CGEN_HW_ENTRY **entries;
+ /* Number of elements in `entries'. */
+ unsigned int num_entries;
+ /* For now, xrealloc is called each time a new entry is added at runtime.
+ ??? May wish to keep track of some slop to reduce the number of calls to
+ xrealloc, except that there's unlikely to be many and not expected to be
+ in speed critical code. */
+} CGEN_HW_TABLE;
+
+extern const CGEN_HW_ENTRY * cgen_hw_lookup_by_name
+ PARAMS ((CGEN_CPU_DESC, const char *));
+extern const CGEN_HW_ENTRY * cgen_hw_lookup_by_num
+ PARAMS ((CGEN_CPU_DESC, int));
/* This struct is used to describe things like register names, etc. */
This should, but technically needn't, appear last. It is a variable sized
array in that one architecture may have 1 nonbool attribute and another
may have more. Having this last means the non-architecture specific code
- needn't care. */
+ needn't care. The goal is to eventually record
+ attributes in their raw form, evaluate them at run-time, and cache the
+ values, so this worry will go away anyway. */
/* ??? Moving this last should be done by treating keywords like insn lists
and moving the `next' fields into a CGEN_KEYWORD_LIST struct. */
/* FIXME: Not used yet. */
#ifndef CGEN_KEYWORD_NBOOL_ATTRS
#define CGEN_KEYWORD_NBOOL_ATTRS 1
#endif
- const CGEN_ATTR_TYPE (CGEN_KEYWORD_NBOOL_ATTRS) attrs;
+ CGEN_ATTR_TYPE (CGEN_KEYWORD_NBOOL_ATTRS) attrs;
+ /* ??? Putting these here means compiled in entries can't be const.
+ Not a really big deal, but something to consider. */
/* Next name hash table entry. */
struct cgen_keyword_entry *next_name;
/* Next value hash table entry. */
/* Top level struct for describing a set of related keywords
(e.g. register names).
- This struct supports runtime entry of new values, and hashed lookups. */
+ This struct supports run-time entry of new values, and hashed lookups. */
typedef struct cgen_keyword
{
/* Pointer to initial [compiled in] values. */
- CGEN_KEYWORD_ENTRY * init_entries;
+ CGEN_KEYWORD_ENTRY *init_entries;
/* Number of entries in `init_entries'. */
unsigned int num_init_entries;
/* Hash table used for name lookup. */
- CGEN_KEYWORD_ENTRY ** name_hash_table;
+ CGEN_KEYWORD_ENTRY **name_hash_table;
/* Hash table used for value lookup. */
- CGEN_KEYWORD_ENTRY ** value_hash_table;
+ CGEN_KEYWORD_ENTRY **value_hash_table;
/* Number of entries in the hash_tables. */
unsigned int hash_table_size;
/* Pointer to null keyword "" entry if present. */
- const CGEN_KEYWORD_ENTRY * null_entry;
+ const CGEN_KEYWORD_ENTRY *null_entry;
} CGEN_KEYWORD;
/* Structure used for searching. */
typedef struct
{
/* Table being searched. */
- const CGEN_KEYWORD * table;
+ const CGEN_KEYWORD *table;
/* Specification of what is being searched for. */
- const char * spec;
+ const char *spec;
/* Current index in hash table. */
unsigned int current_hash;
/* Current element in current hash chain. */
- CGEN_KEYWORD_ENTRY * current_entry;
+ CGEN_KEYWORD_ENTRY *current_entry;
} CGEN_KEYWORD_SEARCH;
/* Lookup a keyword from its name. */
-const CGEN_KEYWORD_ENTRY * cgen_keyword_lookup_name
+
+const CGEN_KEYWORD_ENTRY *cgen_keyword_lookup_name
PARAMS ((CGEN_KEYWORD *, const char *));
+
/* Lookup a keyword from its value. */
-const CGEN_KEYWORD_ENTRY * cgen_keyword_lookup_value
+
+const CGEN_KEYWORD_ENTRY *cgen_keyword_lookup_value
PARAMS ((CGEN_KEYWORD *, int));
+
/* Add a keyword. */
+
void cgen_keyword_add PARAMS ((CGEN_KEYWORD *, CGEN_KEYWORD_ENTRY *));
+
/* Keyword searching.
This can be used to retrieve every keyword, or a subset. */
+
CGEN_KEYWORD_SEARCH cgen_keyword_search_init
PARAMS ((CGEN_KEYWORD *, const char *));
const CGEN_KEYWORD_ENTRY *cgen_keyword_search_next
PARAMS ((CGEN_KEYWORD_SEARCH *));
/* Operand value support routines. */
-/* FIXME: some of the long's here will need to be bfd_vma or some such. */
-
-extern const char * cgen_parse_keyword PARAMS ((const char **,
- CGEN_KEYWORD *,
- long *));
-extern const char * cgen_parse_signed_integer PARAMS ((const char **, int,
- long *));
-extern const char * cgen_parse_unsigned_integer PARAMS ((const char **, int,
- unsigned long *));
-extern const char * cgen_parse_address PARAMS ((const char **, int, int,
- enum cgen_parse_operand_result *,
- long *));
-extern const char * cgen_validate_signed_integer PARAMS ((long, long, long));
-extern const char * cgen_validate_unsigned_integer PARAMS ((unsigned long,
- unsigned long,
- unsigned long));
+
+extern const char *cgen_parse_keyword
+ PARAMS ((CGEN_CPU_DESC, const char **, CGEN_KEYWORD *, long *));
+#ifdef BFD_VERSION /* Don't require bfd.h unnecessarily. */
+extern const char *cgen_parse_signed_integer
+ PARAMS ((CGEN_CPU_DESC, const char **, int, long *));
+extern const char *cgen_parse_unsigned_integer
+ PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
+extern const char *cgen_parse_address
+ PARAMS ((CGEN_CPU_DESC, const char **, int, int,
+ enum cgen_parse_operand_result *, bfd_vma *));
+extern const char *cgen_validate_signed_integer
+ PARAMS ((long, long, long));
+extern const char *cgen_validate_unsigned_integer
+ PARAMS ((unsigned long, unsigned long, unsigned long));
+#endif
\f
/* Operand modes. */
to <arch>-opc.h, or add a hook. */
enum cgen_mode {
- CGEN_MODE_VOID, /* FIXME: rename simulator's VM to VOID */
+ CGEN_MODE_VOID, /* ??? rename simulator's VM to VOID? */
CGEN_MODE_BI, CGEN_MODE_QI, CGEN_MODE_HI, CGEN_MODE_SI, CGEN_MODE_DI,
CGEN_MODE_UBI, CGEN_MODE_UQI, CGEN_MODE_UHI, CGEN_MODE_USI, CGEN_MODE_UDI,
CGEN_MODE_SF, CGEN_MODE_DF, CGEN_MODE_XF, CGEN_MODE_TF,
+ CGEN_MODE_TARGET_MAX,
+ CGEN_MODE_INT, CGEN_MODE_UINT,
CGEN_MODE_MAX
};
/* FIXME: Until simulator is updated. */
+
#define CGEN_MODE_VM CGEN_MODE_VOID
\f
+/* Operands. */
+
+#ifndef CGEN_ARCH
+enum cgen_operand_type { CGEN_OPERAND_MAX };
+#endif
+
+/* "nil" indicator for the operand instance table */
+#define CGEN_OPERAND_NIL CGEN_OPERAND_MAX
+
/* This struct defines each entry in the operand table. */
-typedef struct cgen_operand
+typedef struct
{
/* Name as it appears in the syntax string. */
- char * name;
+ char *name;
+
+ /* Operand type. */
+ enum cgen_operand_type type;
/* The hardware element associated with this operand. */
- const CGEN_HW_ENTRY *hw;
+ enum cgen_hw_type hw_type;
/* FIXME: We don't yet record ifield definitions, which we should.
When we do it might make sense to delete start/length (since they will
be duplicated in the ifield's definition) and replace them with a
- pointer to the ifield entry. Note that as more complicated situations
- need to be handled, going more and more with an OOP paradigm will help
- keep the complication under control. Of course, this was the goal from
- the start, but getting there in one step was too much too soon. */
+ pointer to the ifield entry. */
- /* Bit position (msb of first byte = bit 0).
+ /* Bit position.
This is just a hint, and may be unused in more complex operands.
May be unused for a modifier. */
unsigned char start;
This should, but technically needn't, appear last. It is a variable sized
array in that one architecture may have 1 nonbool attribute and another
may have more. Having this last means the non-architecture specific code
- needn't care, now or tomorrow. */
+ needn't care, now or tomorrow. The goal is to eventually record
+ attributes in their raw form, evaluate them at run-time, and cache the
+ values, so this worry will go away anyway. */
#ifndef CGEN_OPERAND_NBOOL_ATTRS
#define CGEN_OPERAND_NBOOL_ATTRS 1
#endif
- const CGEN_ATTR_TYPE (CGEN_OPERAND_NBOOL_ATTRS) attrs;
+ CGEN_ATTR_TYPE (CGEN_OPERAND_NBOOL_ATTRS) attrs;
#define CGEN_OPERAND_ATTRS(operand) (&(operand)->attrs)
} CGEN_OPERAND;
/* Return value of attribute ATTR in OPERAND. */
-#define CGEN_OPERAND_ATTR(operand, attr) \
-CGEN_ATTR_VALUE (operand, CGEN_OPERAND_ATTRS (operand), attr)
-
-/* The operand table is currently a very static entity. */
-extern const CGEN_OPERAND CGEN_SYM (operand_table)[];
-enum cgen_operand_type;
-
-#define CGEN_OPERAND_INDEX(operand) ((int) ((operand) - CGEN_SYM (operand_table)))
-/* FIXME: Rename, cpu-opc.h defines this as the typedef of the enum. */
-#define CGEN_OPERAND_TYPE(operand) ((enum cgen_operand_type) CGEN_OPERAND_INDEX (operand))
-#define CGEN_OPERAND_ENTRY(n) (& CGEN_SYM (operand_table) [n])
-
-/* Types of parse/insert/extract/print cover-fn handlers. */
-/* FIXME: move opindex first to match caller. */
-/* FIXME: also need types of insert/extract/print fns. */
-/* FIXME: not currently used as type of 3rd arg varies. */
-typedef const char * (CGEN_PARSE_OPERAND_FN) PARAMS ((const char **, int,
- long *));
+#define CGEN_OPERAND_ATTR_VALUE(operand, attr) \
+CGEN_ATTR_VALUE ((operand), CGEN_OPERAND_ATTRS (operand), (attr))
+
+/* Table of operands for selected mach/isa, computed at runtime.
+ enum cgen_operand_type is an index into this table (specifically
+ `entries'). */
+
+typedef struct {
+ /* Pointer to null terminated table of all compiled in entries. */
+ const CGEN_OPERAND *init_entries;
+ unsigned int entry_size; /* since the attribute member is variable sized */
+ /* Array of all entries, initial and run-time added. */
+ const CGEN_OPERAND **entries;
+ /* Number of elements in `entries'. */
+ unsigned int num_entries;
+ /* For now, xrealloc is called each time a new entry is added at runtime.
+ ??? May wish to keep track of some slop to reduce the number of calls to
+ xrealloc, except that there's unlikely to be many and not expected to be
+ in speed critical code. */
+} CGEN_OPERAND_TABLE;
+
+extern const CGEN_OPERAND * cgen_operand_lookup_by_name
+ PARAMS ((CGEN_CPU_DESC, const char *));
+extern const CGEN_OPERAND * cgen_operand_lookup_by_num
+ PARAMS ((CGEN_CPU_DESC, int));
\f
/* Instruction operand instances.
written are recorded. */
/* The type of the instance. */
-enum cgen_operand_instance_type {
+
+enum cgen_opinst_type {
/* End of table marker. */
- CGEN_OPERAND_INSTANCE_END = 0,
- CGEN_OPERAND_INSTANCE_INPUT, CGEN_OPERAND_INSTANCE_OUTPUT
+ CGEN_OPINST_END = 0,
+ CGEN_OPINST_INPUT, CGEN_OPINST_OUTPUT
};
typedef struct
{
- /* The type of this operand. */
- enum cgen_operand_instance_type type;
-#define CGEN_OPERAND_INSTANCE_TYPE(opinst) ((opinst)->type)
+ /* Input or output indicator. */
+ enum cgen_opinst_type type;
+
+ /* Name of operand. */
+ const char *name;
/* The hardware element referenced. */
- const CGEN_HW_ENTRY *hw;
-#define CGEN_OPERAND_INSTANCE_HW(opinst) ((opinst)->hw)
+ enum cgen_hw_type hw_type;
/* The mode in which the operand is being used. */
enum cgen_mode mode;
-#define CGEN_OPERAND_INSTANCE_MODE(opinst) ((opinst)->mode)
- /* The operand table entry or NULL if there is none (i.e. an explicit
- hardware reference). */
- const CGEN_OPERAND *operand;
-#define CGEN_OPERAND_INSTANCE_OPERAND(opinst) ((opinst)->operand)
+ /* The operand table entry CGEN_OPERAND_NIL if there is none
+ (i.e. an explicit hardware reference). */
+ enum cgen_operand_type op_type;
- /* If `operand' is NULL, the index (e.g. into array of registers). */
+ /* If `operand' is "nil", the index (e.g. into array of registers). */
int index;
-#define CGEN_OPERAND_INSTANCE_INDEX(opinst) ((opinst)->index)
-} CGEN_OPERAND_INSTANCE;
+
+ /* Attributes.
+ ??? This perhaps should be a real attribute struct but there's
+ no current need, so we save a bit of space and just have a set of
+ flags. The interface is such that this can easily be made attributes
+ should it prove useful. */
+ unsigned int attrs;
+#define CGEN_OPINST_ATTRS(opinst) ((opinst)->attrs)
+/* Return value of attribute ATTR in OPINST. */
+#define CGEN_OPINST_ATTR(opinst, attr) \
+((CGEN_OPINST_ATTRS (opinst) & (attr)) != 0)
+/* Operand is conditionally referenced (read/written). */
+#define CGEN_OPINST_COND_REF 1
+} CGEN_OPINST;
\f
/* Syntax string.
into the operand table. The operand table doesn't exist in C, per se, as
the data is recorded in the parse/insert/extract/print switch statements. */
-#ifndef CGEN_MAX_SYNTAX_BYTES
-#define CGEN_MAX_SYNTAX_BYTES 16
+/* This should be at least as large as necessary for any target. */
+#define CGEN_MAX_SYNTAX_BYTES 32
+
+/* A target may know its own precise maximum. Assert that it falls below
+ the above limit. */
+#ifdef CGEN_ACTUAL_MAX_SYNTAX_BYTES
+#if CGEN_ACTUAL_MAX_SYNTAX_BYTES > CGEN_MAX_SYNTAX_BYTES
+#error "CGEN_ACTUAL_MAX_SYNTAX_BYTES too high - enlarge CGEN_MAX_SYNTAX_BYTES"
#endif
+#endif
+
typedef struct
{
However, we treat mnemonics as just another operand of the instruction.
A value of 1 means "this is where the mnemonic appears". 1 isn't
special other than it's a non-printable ASCII char. */
+
#define CGEN_SYNTAX_MNEMONIC 1
#define CGEN_SYNTAX_MNEMONIC_P(ch) ((ch) == CGEN_SYNTAX_MNEMONIC)
\f
+/* Instruction fields.
+
+ ??? We currently don't allow adding fields at run-time.
+ Easy to fix when needed. */
+
+typedef struct cgen_ifld {
+ /* Enum of ifield. */
+ int num;
+#define CGEN_IFLD_NUM(f) ((f)->num)
+
+ /* Name of the field, distinguishes it from all other fields. */
+ const char *name;
+#define CGEN_IFLD_NAME(f) ((f)->name)
+
+ /* Default offset, in bits, from the start of the insn to the word
+ containing the field. */
+ int word_offset;
+#define CGEN_IFLD_WORD_OFFSET(f) ((f)->word_offset)
+
+ /* Default length of the word containing the field. */
+ int word_size;
+#define CGEN_IFLD_WORD_SIZE(f) ((f)->word_size)
+
+ /* Default starting bit number.
+ Whether lsb=0 or msb=0 is determined by CGEN_INSN_LSB0_P. */
+ int start;
+#define CGEN_IFLD_START(f) ((f)->start)
+
+ /* Length of the field, in bits. */
+ int length;
+#define CGEN_IFLD_LENGTH(f) ((f)->length)
+
+#ifndef CGEN_IFLD_NBOOL_ATTRS
+#define CGEN_IFLD_NBOOL_ATTRS 1
+#endif
+ CGEN_ATTR_TYPE (CGEN_IFLD_NBOOL_ATTRS) attrs;
+#define CGEN_IFLD_ATTRS(f) (&(f)->attrs)
+} CGEN_IFLD;
+
+/* Return value of attribute ATTR in IFLD. */
+#define CGEN_IFLD_ATTR_VALUE(ifld, attr) \
+CGEN_ATTR_VALUE ((ifld), CGEN_IFLD_ATTRS (ifld), (attr))
+\f
+/* Instruction data. */
+
/* Instruction formats.
Instructions are grouped by format. Associated with an instruction is its
- format. Each opcode table entry contains a format table entry.
+ format. Each insn's opcode table entry contains a format table entry.
??? There is usually very few formats compared with the number of insns,
so one can reduce the size of the opcode table by recording the format table
as a separate entity. Given that we currently don't, format table entries
??? Support for variable length ISA's is wip. */
+/* Accompanying each iformat description is a list of its fields. */
+
+typedef struct {
+ const CGEN_IFLD *ifld;
+#define CGEN_IFMT_IFLD_IFLD(ii) ((ii)->ifld)
+} CGEN_IFMT_IFLD;
+
+/* This should be at least as large as necessary for any target. */
+#define CGEN_MAX_IFMT_OPERANDS 16
+
+/* A target may know its own precise maximum. Assert that it falls below
+ the above limit. */
+#ifdef CGEN_ACTUAL_MAX_IFMT_OPERANDS
+#if CGEN_ACTUAL_MAX_IFMT_OPERANDS > CGEN_MAX_IFMT_OPERANDS
+#error "CGEN_ACTUAL_MAX_IFMT_OPERANDS too high - enlarge CGEN_MAX_IFMT_OPERANDS"
+#endif
+#endif
+
+
typedef struct
{
/* Length that MASK and VALUE have been calculated to
[VALUE is recorded elsewhere].
- Normally it is CGEN_BASE_INSN_BITSIZE. On [V]LIW architectures where
- the base insn size may be larger than the size of an insn, this field is
- less than CGEN_BASE_INSN_BITSIZE. */
+ Normally it is base_insn_bitsize. On [V]LIW architectures where the base
+ insn size may be larger than the size of an insn, this field is less than
+ base_insn_bitsize. */
unsigned char mask_length;
+#define CGEN_IFMT_MASK_LENGTH(ifmt) ((ifmt)->mask_length)
/* Total length of instruction, in bits. */
unsigned char length;
+#define CGEN_IFMT_LENGTH(ifmt) ((ifmt)->length)
/* Mask to apply to the first MASK_LENGTH bits.
Each insn's value is stored with the insn.
The first step in recognizing an insn for disassembly is
(opcode & mask) == value. */
- unsigned int mask;
-} CGEN_FORMAT;
-\f
-/* This struct defines each entry in the instruction table. */
+ CGEN_INSN_INT mask;
+#define CGEN_IFMT_MASK(ifmt) ((ifmt)->mask)
-struct cgen_insn
+ /* Instruction fields.
+ +1 for trailing NULL. */
+ CGEN_IFMT_IFLD iflds[CGEN_MAX_IFMT_OPERANDS + 1];
+#define CGEN_IFMT_IFLDS(ifmt) ((ifmt)->iflds)
+} CGEN_IFMT;
+
+/* Instruction values. */
+
+typedef struct
{
- /* This field is an array of functions that operand on this entry. */
- struct cgen_base base;
-#define CGEN_INSN_BASE(insn) (&(insn)->base)
+ /* The opcode portion of the base insn. */
+ CGEN_INSN_INT base_value;
- /* Each real instruction is enumerated.
- The simulator use to use this value but currently no longer does.
- This may go away in time. */
- int num;
-#define CGEN_INSN_NUM(insn) ((insn)->num)
+#ifdef CGEN_MAX_EXTRA_OPCODE_OPERANDS
+ /* Extra opcode values beyond base_value. */
+ unsigned long ifield_values[CGEN_MAX_EXTRA_OPCODE_OPERANDS];
+#endif
+} CGEN_IVALUE;
- /* Name of entry (that distinguishes it from all other entries).
- This is used, for example, in simulator profiling results. */
- /* ??? If mnemonics have operands, try to print full mnemonic. */
- const char * name;
-#define CGEN_INSN_NAME(insn) ((insn)->name)
+/* Instruction opcode table.
+ This contains the syntax and format data of an instruction. */
- /* Mnemonic. This is used when parsing and printing the insn.
- In the case of insns that have operands on the mnemonics, this is
- only the constant part. E.g. for conditional execution of an `add' insn,
- where the full mnemonic is addeq, addne, etc., this is only "add". */
- const char * mnemonic;
-#define CGEN_INSN_MNEMONIC(insn) ((insn)->mnemonic)
+/* ??? Some ports already have an opcode table yet still need to use the rest
+ of what cgen_insn has. Plus keeping the opcode data with the operand
+ instance data can create a pretty big file. So we keep them separately.
+ Not sure this is a good idea in the long run. */
+
+typedef struct
+{
+ /* Indices into parse/insert/extract/print handler tables. */
+ struct cgen_opcode_handler handlers;
+#define CGEN_OPCODE_HANDLERS(opc) (& (opc)->handlers)
/* Syntax string. */
- const CGEN_SYNTAX syntax;
-#define CGEN_INSN_SYNTAX(insn) (& (insn)->syntax)
+ CGEN_SYNTAX syntax;
+#define CGEN_OPCODE_SYNTAX(opc) (& (opc)->syntax)
/* Format entry. */
- const CGEN_FORMAT format;
-#define CGEN_INSN_MASK_BITSIZE(insn) ((insn)->format.mask_length)
-#define CGEN_INSN_BITSIZE(insn) ((insn)->format.length)
+ const CGEN_IFMT *format;
+#define CGEN_OPCODE_FORMAT(opc) ((opc)->format)
+#define CGEN_OPCODE_MASK_BITSIZE(opc) CGEN_IFMT_MASK_LENGTH (CGEN_OPCODE_FORMAT (opc))
+#define CGEN_OPCODE_BITSIZE(opc) CGEN_IFMT_LENGTH (CGEN_OPCODE_FORMAT (opc))
+#define CGEN_OPCODE_IFLDS(opc) CGEN_IFMT_IFLDS (CGEN_OPCODE_FORMAT (opc))
/* Instruction opcode value. */
- unsigned int value;
-#define CGEN_INSN_VALUE(insn) ((insn)->value)
-#define CGEN_INSN_MASK(insn) ((insn)->format.mask)
-
- /* Opaque pointer to "subclass" specific data.
- In the case of real insns this points to a NULL entry terminated
- table of operands used, or NULL if none.
- In the case of macro insns this points to data to control the expansion.
- ??? I'd rather not get carried away and lay things out with pedantic
- purity right now. Sure, other fields might better be tucked away in
- `data'. Not now. */
- PTR data;
-#define CGEN_INSN_DATA(insn) ((insn)->data)
-#define CGEN_INSN_OPERANDS(insn) ((CGEN_OPERAND_INSTANCE *) (insn)->data)
+ CGEN_IVALUE value;
+#define CGEN_OPCODE_VALUE(opc) (& (opc)->value)
+#define CGEN_OPCODE_BASE_VALUE(opc) (CGEN_OPCODE_VALUE (opc)->base_value)
+#define CGEN_OPCODE_BASE_MASK(opc) CGEN_IFMT_MASK (CGEN_OPCODE_FORMAT (opc))
+} CGEN_OPCODE;
+
+/* Instruction attributes.
+ This is made a published type as applications can cache a pointer to
+ the attributes for speed. */
+
+#ifndef CGEN_INSN_NBOOL_ATTRS
+#define CGEN_INSN_NBOOL_ATTRS 1
+#endif
+typedef CGEN_ATTR_TYPE (CGEN_INSN_NBOOL_ATTRS) CGEN_INSN_ATTR_TYPE;
+
+/* Enum of architecture independent attributes. */
+
+#ifndef CGEN_ARCH
+/* ??? Numbers here are recorded in two places. */
+typedef enum cgen_insn_attr {
+ CGEN_INSN_ALIAS = 0
+} CGEN_INSN_ATTR;
+#endif
+
+/* This struct defines each entry in the instruction table. */
+
+typedef struct
+{
+ /* Each real instruction is enumerated. */
+ /* ??? This may go away in time. */
+ int num;
+#define CGEN_INSN_NUM(insn) ((insn)->base->num)
+
+ /* Name of entry (that distinguishes it from all other entries). */
+ /* ??? If mnemonics have operands, try to print full mnemonic. */
+ const char *name;
+#define CGEN_INSN_NAME(insn) ((insn)->base->name)
+
+ /* Mnemonic. This is used when parsing and printing the insn.
+ In the case of insns that have operands on the mnemonics, this is
+ only the constant part. E.g. for conditional execution of an `add' insn,
+ where the full mnemonic is addeq, addne, etc., and the condition is
+ treated as an operand, this is only "add". */
+ const char *mnemonic;
+#define CGEN_INSN_MNEMONIC(insn) ((insn)->base->mnemonic)
+
+ /* Total length of instruction, in bits. */
+ int bitsize;
+#define CGEN_INSN_BITSIZE(insn) ((insn)->base->bitsize)
+
+#if 0 /* ??? Disabled for now as there is a problem with embedded newlines
+ and the table is already pretty big. Should perhaps be moved
+ to a file of its own. */
+ /* Semantics, as RTL. */
+ /* ??? Plain text or bytecodes? */
+ /* ??? Note that the operand instance table could be computed at run-time
+ if we parse this and cache the results. Something to eventually do. */
+ const char *rtx;
+#define CGEN_INSN_RTX(insn) ((insn)->base->rtx)
+#endif
/* Attributes.
This must appear last. It is a variable sized array in that one
architecture may have 1 nonbool attribute and another may have more.
Having this last means the non-architecture specific code needn't
- care. */
-#ifndef CGEN_INSN_NBOOL_ATTRS
-#define CGEN_INSN_NBOOL_ATTRS 1
-#endif
- const CGEN_ATTR_TYPE (CGEN_INSN_NBOOL_ATTRS) attrs;
-#define CGEN_INSN_ATTRS(insn) (&(insn)->attrs)
+ care. The goal is to eventually record attributes in their raw form,
+ evaluate them at run-time, and cache the values, so this worry will go
+ away anyway. */
+ CGEN_INSN_ATTR_TYPE attrs;
+#define CGEN_INSN_ATTRS(insn) (&(insn)->base->attrs)
/* Return value of attribute ATTR in INSN. */
-#define CGEN_INSN_ATTR(insn, attr) \
-CGEN_ATTR_VALUE (insn, CGEN_INSN_ATTRS (insn), attr)
+#define CGEN_INSN_ATTR_VALUE(insn, attr) \
+CGEN_ATTR_VALUE ((insn), CGEN_INSN_ATTRS (insn), (attr))
+} CGEN_IBASE;
+
+/* Return non-zero if INSN is the "invalid" insn marker. */
+
+#define CGEN_INSN_INVALID_P(insn) (CGEN_INSN_MNEMONIC (insn) == 0)
+
+/* Main struct contain instruction information.
+ BASE is always present, the rest is present only if asked for. */
+
+struct cgen_insn
+{
+ /* ??? May be of use to put a type indicator here.
+ Then this struct could different info for different classes of insns. */
+ /* ??? A speedup can be had by moving `base' into this struct.
+ Maybe later. */
+ const CGEN_IBASE *base;
+ const CGEN_OPCODE *opcode;
+ const CGEN_OPINST *opinst;
};
/* Instruction lists.
typedef struct cgen_insn_list
{
- struct cgen_insn_list * next;
- const CGEN_INSN * insn;
+ struct cgen_insn_list *next;
+ const CGEN_INSN *insn;
} CGEN_INSN_LIST;
-/* The table of instructions. */
+/* Table of instructions. */
typedef struct
{
- /* Pointer to initial [compiled in] entries. */
- const CGEN_INSN * init_entries;
-
- /* Size of an entry (since the attribute member is variable sized). */
- unsigned int entry_size;
-
- /* Number of entries in `init_entries', including trailing NULL entry. */
+ const CGEN_INSN *init_entries;
+ unsigned int entry_size; /* since the attribute member is variable sized */
unsigned int num_init_entries;
-
- /* Values added at runtime. */
- CGEN_INSN_LIST * new_entries;
+ CGEN_INSN_LIST *new_entries;
} CGEN_INSN_TABLE;
-/* ??? This is currently used by the simulator. */
-extern const CGEN_INSN CGEN_SYM (insn_table_entries)[];
+/* Return number of instructions. This includes any added at run-time. */
+
+extern int cgen_insn_count PARAMS ((CGEN_CPU_DESC));
+extern int cgen_macro_insn_count PARAMS ((CGEN_CPU_DESC));
+
+/* Macros to access the other insn elements not recorded in CGEN_IBASE. */
+
+/* Fetch INSN's operand instance table. */
+/* ??? Doesn't handle insns added at runtime. */
+#define CGEN_INSN_OPERANDS(insn) ((insn)->opinst)
+
+/* Return INSN's opcode table entry. */
+#define CGEN_INSN_OPCODE(insn) ((insn)->opcode)
+
+/* Return INSN's handler data. */
+#define CGEN_INSN_HANDLERS(insn) CGEN_OPCODE_HANDLERS (CGEN_INSN_OPCODE (insn))
+
+/* Return INSN's syntax. */
+#define CGEN_INSN_SYNTAX(insn) CGEN_OPCODE_SYNTAX (CGEN_INSN_OPCODE (insn))
+
+/* Return size of base mask in bits. */
+#define CGEN_INSN_MASK_BITSIZE(insn) \
+ CGEN_OPCODE_MASK_BITSIZE (CGEN_INSN_OPCODE (insn))
+
+/* Return mask of base part of INSN. */
+#define CGEN_INSN_BASE_MASK(insn) \
+ CGEN_OPCODE_BASE_MASK (CGEN_INSN_OPCODE (insn))
-/* Return number of instructions. This includes any added at runtime. */
+/* Return value of base part of INSN. */
+#define CGEN_INSN_BASE_VALUE(insn) \
+ CGEN_OPCODE_BASE_VALUE (CGEN_INSN_OPCODE (insn))
-extern int cgen_insn_count PARAMS ((void));
+/* Standard way to test whether INSN is supported by MACH.
+ MACH is one of enum mach_attr.
+ The "|1" is because the base mach is always selected. */
+#define CGEN_INSN_MACH_HAS_P(insn, mach) \
+((CGEN_INSN_ATTR_VALUE ((insn), CGEN_INSN_MACH) & ((1 << (mach)) | 1)) != 0)
\f
/* Macro instructions.
Macro insns aren't real insns, they map to one or more real insns.
Space for the expansion is obtained with malloc.
It is up to the caller to free it. */
const char * (* fn) PARAMS ((const struct cgen_minsn_expansion *,
- const char *, const char **, int *, CGEN_OPERAND **));
+ const char *, const char **, int *,
+ CGEN_OPERAND **));
#define CGEN_MIEXPN_FN(ex) ((ex)->fn)
/* Instruction(s) the macro expands to.
may contain further macro invocations. */
extern const char * cgen_expand_macro_insn
- PARAMS ((const struct cgen_minsn_expansion *,
+ PARAMS ((CGEN_CPU_DESC, const struct cgen_minsn_expansion *,
const char *, const char **, int *, CGEN_OPERAND **));
\f
/* The assembler insn table is hashed based on some function of the mnemonic
(the actually hashing done is up to the target, but we provide a few
examples like the first letter or a function of the entire mnemonic). */
-#ifndef CGEN_ASM_HASH_P
-#define CGEN_ASM_HASH_P(insn) 1
-#endif
-
-/* INSN is the CGEN_INSN entry when building the hash table and NULL
- when looking up the insn during assembly. */
-#ifndef CGEN_ASM_HASH
-#define CGEN_ASM_HASH_SIZE 127
-#ifdef CGEN_MNEMONIC_OPERANDS
-#define CGEN_ASM_HASH(mnem) (*(unsigned char *) (mnem) % CGEN_ASM_HASH_SIZE)
-#else
-#define CGEN_ASM_HASH(mnem) (*(unsigned char *) (mnem) % CGEN_ASM_HASH_SIZE) /*FIXME*/
-#endif
-#endif
-
-extern CGEN_INSN_LIST * cgen_asm_lookup_insn PARAMS ((const char *));
-#define CGEN_ASM_LOOKUP_INSN(string) cgen_asm_lookup_insn (string)
+extern CGEN_INSN_LIST * cgen_asm_lookup_insn
+ PARAMS ((CGEN_CPU_DESC, const char *));
+#define CGEN_ASM_LOOKUP_INSN(cd, string) cgen_asm_lookup_insn ((cd), (string))
#define CGEN_ASM_NEXT_INSN(insn) ((insn)->next)
/* The disassembler insn table is hashed based on some function of machine
instruction (the actually hashing done is up to the target). */
-#ifndef CGEN_DIS_HASH_P
-#define CGEN_DIS_HASH_P(insn) 1
-#endif
-
-/* It doesn't make much sense to provide a default here,
- but while this is under development we do.
- INSN is the CGEN_INSN entry when building the hash table and NULL
- when looking up the insn during assembly.
- BUFFER is a pointer to the bytes of the insn.
- VALUE is the first CGEN_BASE_INSN_SIZE bytes as an int in host order. */
-#ifndef CGEN_DIS_HASH
-#define CGEN_DIS_HASH_SIZE 256
-#define CGEN_DIS_HASH(buffer, value) (*(unsigned char *) (buffer))
-#endif
-
-extern CGEN_INSN_LIST * cgen_dis_lookup_insn PARAMS ((const char *,
- unsigned long));
-#define CGEN_DIS_LOOKUP_INSN(buf, value) cgen_dis_lookup_insn ((buf), (value))
+extern CGEN_INSN_LIST * cgen_dis_lookup_insn
+ PARAMS ((CGEN_CPU_DESC, const char *, CGEN_INSN_INT));
+/* FIXME: delete these two */
+#define CGEN_DIS_LOOKUP_INSN(cd, buf, value) cgen_dis_lookup_insn ((cd), (buf), (value))
#define CGEN_DIS_NEXT_INSN(insn) ((insn)->next)
\f
-/* Top level structures and functions. */
+/* The CPU description.
+ A copy of this is created when the cpu table is "opened".
+ All global state information is recorded here.
+ Access macros are provided for "public" members. */
-typedef struct
+typedef struct cgen_cpu_desc
{
- const CGEN_HW_ENTRY * hw_list;
+ /* Bitmap of selected machine(s) (a la BFD machine number). */
+ int machs;
+
+ /* Bitmap of selected isa(s).
+ ??? Simultaneous multiple isas might not make sense, but it's not (yet)
+ precluded. */
+ int isas;
+
+ /* Current endian. */
+ enum cgen_endian endian;
+#define CGEN_CPU_ENDIAN(cd) ((cd)->endian)
+
+ /* Current insn endian. */
+ enum cgen_endian insn_endian;
+#define CGEN_CPU_INSN_ENDIAN(cd) ((cd)->insn_endian)
+
+ /* Word size (in bits). */
+ /* ??? Or maybe maximum word size - might we ever need to allow a cpu table
+ to be opened for both sparc32/sparc64?
+ ??? Another alternative is to create a table of selected machs and
+ lazily fetch the data from there. */
+ unsigned int word_bitsize;
- /*CGEN_OPERAND_TABLE * operand_table; - FIXME:wip */
+ /* Indicator if sizes are unknown.
+ This is used by default_insn_bitsize,base_insn_bitsize if there is a
+ difference between the selected isa's. */
+#define CGEN_SIZE_UNKNOWN 65535
- CGEN_INSN_TABLE * insn_table;
+ /* Default instruction size (in bits).
+ This is used by the assembler when it encounters an unknown insn. */
+ unsigned int default_insn_bitsize;
+
+ /* Base instruction size (in bits).
+ For non-LIW cpus this is generally the length of the smallest insn.
+ For LIW cpus its wip (work-in-progress). For the m32r its 32. */
+ unsigned int base_insn_bitsize;
+
+ /* Minimum/maximum instruction size (in bits). */
+ unsigned int min_insn_bitsize;
+ unsigned int max_insn_bitsize;
+
+ /* Instruction set variants. */
+ const CGEN_ISA *isa_table;
+
+ /* Machine variants. */
+ const CGEN_MACH *mach_table;
+
+ /* Hardware elements. */
+ CGEN_HW_TABLE hw_table;
+
+ /* Instruction fields. */
+ const CGEN_IFLD *ifld_table;
+
+ /* Operands. */
+ CGEN_OPERAND_TABLE operand_table;
+
+ /* Main instruction table. */
+ CGEN_INSN_TABLE insn_table;
+#define CGEN_CPU_INSN_TABLE(cd) (& (cd)->insn_table)
/* Macro instructions are defined separately and are combined with real
insns during hash table computation. */
- CGEN_INSN_TABLE * macro_insn_table;
+ CGEN_INSN_TABLE macro_insn_table;
+
+ /* Copy of CGEN_INT_INSN_P. */
+ int int_insn_p;
+
+ /* Called to rebuild the tables after something has changed. */
+ void (*rebuild_tables) PARAMS ((CGEN_CPU_DESC));
+
+ /* Operand parser callback. */
+ cgen_parse_operand_fn * parse_operand_fn;
+
+ /* Parse/insert/extract/print cover fns for operands. */
+ const char * (*parse_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, const char **,
+ CGEN_FIELDS *fields_));
+#ifdef BFD_VERSION
+ const char * (*insert_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, CGEN_FIELDS *fields_,
+ CGEN_INSN_BYTES_PTR, bfd_vma pc_));
+ int (*extract_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
+ CGEN_FIELDS *fields_, bfd_vma pc_));
+ void (*print_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, PTR info_, CGEN_FIELDS * fields_,
+ void const *attrs_, bfd_vma pc_, int length_));
+#else
+ const char * (*insert_operand) ();
+ int (*extract_operand) ();
+ void (*print_operand) ();
+#endif
+#define CGEN_CPU_PARSE_OPERAND(cd) ((cd)->parse_operand)
+#define CGEN_CPU_INSERT_OPERAND(cd) ((cd)->insert_operand)
+#define CGEN_CPU_EXTRACT_OPERAND(cd) ((cd)->extract_operand)
+#define CGEN_CPU_PRINT_OPERAND(cd) ((cd)->print_operand)
+
+ /* Size of CGEN_FIELDS struct. */
+ unsigned int sizeof_fields;
+#define CGEN_CPU_SIZEOF_FIELDS(cd) ((cd)->sizeof_fields)
+
+ /* Set the bitsize field. */
+ void (*set_fields_bitsize) PARAMS ((CGEN_FIELDS *fields_, int size_));
+#define CGEN_CPU_SET_FIELDS_BITSIZE(cd) ((cd)->set_fields_bitsize)
+
+ /* CGEN_FIELDS accessors. */
+ int (*get_int_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, const CGEN_FIELDS *fields_));
+ void (*set_int_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, CGEN_FIELDS *fields_, int value_));
+#ifdef BFD_VERSION
+ bfd_vma (*get_vma_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, const CGEN_FIELDS *fields_));
+ void (*set_vma_operand)
+ PARAMS ((CGEN_CPU_DESC, int opindex_, CGEN_FIELDS *fields_, bfd_vma value_));
+#else
+ long (*get_vma_operand) ();
+ void (*set_vma_operand) ();
+#endif
+#define CGEN_CPU_GET_INT_OPERAND(cd) ((cd)->get_int_operand)
+#define CGEN_CPU_SET_INT_OPERAND(cd) ((cd)->set_int_operand)
+#define CGEN_CPU_GET_VMA_OPERAND(cd) ((cd)->get_vma_operand)
+#define CGEN_CPU_SET_VMA_OPERAND(cd) ((cd)->set_vma_operand)
+
+ /* Instruction parse/insert/extract/print handlers. */
+ /* FIXME: make these types uppercase. */
+ cgen_parse_fn * const *parse_handlers;
+ cgen_insert_fn * const *insert_handlers;
+ cgen_extract_fn * const *extract_handlers;
+ cgen_print_fn * const *print_handlers;
+#define CGEN_PARSE_FN(cd, insn) (cd->parse_handlers[(insn)->opcode->handlers.parse])
+#define CGEN_INSERT_FN(cd, insn) (cd->insert_handlers[(insn)->opcode->handlers.insert])
+#define CGEN_EXTRACT_FN(cd, insn) (cd->extract_handlers[(insn)->opcode->handlers.extract])
+#define CGEN_PRINT_FN(cd, insn) (cd->print_handlers[(insn)->opcode->handlers.print])
/* Return non-zero if insn should be added to hash table. */
int (* asm_hash_p) PARAMS ((const CGEN_INSN *));
unsigned int (* asm_hash) PARAMS ((const char *));
/* Number of entries in assembler hash table. */
- unsigned int asm_hash_table_size;
+ unsigned int asm_hash_size;
/* Return non-zero if insn should be added to hash table. */
int (* dis_hash_p) PARAMS ((const CGEN_INSN *));
/* Disassembler hash function. */
- unsigned int (* dis_hash) PARAMS ((const char *, unsigned long));
+ unsigned int (* dis_hash) PARAMS ((const char *, CGEN_INSN_INT));
/* Number of entries in disassembler hash table. */
- unsigned int dis_hash_table_size;
-} CGEN_OPCODE_TABLE;
+ unsigned int dis_hash_size;
-/* Each CPU has one of these. */
-extern const CGEN_OPCODE_TABLE CGEN_SYM (opcode_table);
+ /* Assembler instruction hash table. */
+ CGEN_INSN_LIST **asm_hash_table;
+ CGEN_INSN_LIST *asm_hash_table_entries;
-/* Global state access macros.
- Some of these are tucked away and accessed with cover fns.
- Simpler things like the current machine and endian are not. */
+ /* Disassembler instruction hash table. */
+ CGEN_INSN_LIST **dis_hash_table;
+ CGEN_INSN_LIST *dis_hash_table_entries;
-extern int cgen_current_machine;
-#define CGEN_CURRENT_MACHINE cgen_current_machine
-
-extern enum cgen_endian cgen_current_endian;
-#define CGEN_CURRENT_ENDIAN cgen_current_endian
+ /* This field could be turned into a bitfield if room for other flags is needed. */
+ unsigned int signed_overflow_ok_p;
+
+} CGEN_CPU_TABLE;
+/* wip */
+#ifndef CGEN_WORD_ENDIAN
+#define CGEN_WORD_ENDIAN(cd) CGEN_CPU_ENDIAN (cd)
+#endif
+#ifndef CGEN_INSN_WORD_ENDIAN
+#define CGEN_INSN_WORD_ENDIAN(cd) CGEN_CPU_INSN_ENDIAN (cd)
+#endif
+\f
/* Prototypes of major functions. */
+/* FIXME: Move more CGEN_SYM-defined functions into CGEN_CPU_DESC.
+ Not the init fns though, as that would drag in things that mightn't be
+ used and might not even exist. */
+
+/* Argument types to cpu_open. */
+
+enum cgen_cpu_open_arg {
+ CGEN_CPU_OPEN_END,
+ /* Select instruction set(s), arg is bitmap or 0 meaning "unspecified". */
+ CGEN_CPU_OPEN_ISAS,
+ /* Select machine(s), arg is bitmap or 0 meaning "unspecified". */
+ CGEN_CPU_OPEN_MACHS,
+ /* Select machine, arg is mach's bfd name.
+ Multiple machines can be specified by repeated use. */
+ CGEN_CPU_OPEN_BFDMACH,
+ /* Select endian, arg is CGEN_ENDIAN_*. */
+ CGEN_CPU_OPEN_ENDIAN
+};
-/* Set the current cpu (+ mach number, endian, etc.). */
-extern void cgen_set_cpu PARAMS ((const CGEN_OPCODE_TABLE *, int,
- enum cgen_endian));
-
-/* Initialize the assembler, disassembler. */
-extern void cgen_asm_init PARAMS ((void));
-extern void cgen_dis_init PARAMS ((void));
-
-/* `init_tables' must be called before `xxx_supported'. */
-extern void CGEN_SYM (init_tables) PARAMS ((int));
-extern void CGEN_SYM (init_asm) PARAMS ((int, enum cgen_endian));
-extern void CGEN_SYM (init_dis) PARAMS ((int, enum cgen_endian));
-
-/* FIXME: This prototype is wrong ifndef CGEN_INT_INSN.
- Furthermore, ifdef CGEN_INT_INSN, the insn is created in
- target byte order (in which case why use int's at all).
- Perhaps replace cgen_insn_t * with char *? */
-extern const struct cgen_insn *
-CGEN_SYM (assemble_insn) PARAMS ((const char *, CGEN_FIELDS *,
- cgen_insn_t *, char **));
-#if 0 /* old */
-extern int CGEN_SYM (insn_supported) PARAMS ((const struct cgen_insn *));
-extern int CGEN_SYM (opval_supported) PARAMS ((const struct cgen_opval *));
-#endif
+/* Open a cpu descriptor table for use.
+ ??? We only support ISO C stdargs here, not K&R.
+ Laziness, plus experiment to see if anything requires K&R - eventually
+ K&R will no longer be supported - e.g. GDB is currently trying this. */
-extern const CGEN_KEYWORD CGEN_SYM (operand_mach);
-extern int CGEN_SYM (get_mach) PARAMS ((const char *));
+extern CGEN_CPU_DESC CGEN_SYM (cpu_open) (enum cgen_cpu_open_arg, ...);
-extern const CGEN_INSN *
-CGEN_SYM (lookup_insn) PARAMS ((const CGEN_INSN *, cgen_insn_t,
- int, CGEN_FIELDS *, int));
-extern void
-CGEN_SYM (get_insn_operands) PARAMS ((const CGEN_INSN *, const CGEN_FIELDS *,
- int *));
-extern const CGEN_INSN *
-CGEN_SYM (lookup_get_insn_operands) PARAMS ((const CGEN_INSN *, cgen_insn_t,
- int, int *));
-
-/* Get/set fields in the CGEN_FIELDS struct. */
-int
-CGEN_SYM (get_int_operand) PARAMS ((int, const CGEN_FIELDS *));
-void
-CGEN_SYM (set_int_operand) PARAMS ((int, CGEN_FIELDS *, int));
-#ifdef BFD_VERSION /* Don't require bfd.h unnecessarily. */
-bfd_vma
-CGEN_SYM (get_vma_operand) PARAMS ((int, const CGEN_FIELDS *));
-void
-CGEN_SYM (set_vma_operand) PARAMS ((int, CGEN_FIELDS *, bfd_vma));
-#endif
+/* Cover fn to handle simple case. */
-extern const char *
-CGEN_SYM (parse_operand) PARAMS ((int, const char **, CGEN_FIELDS *));
+extern CGEN_CPU_DESC CGEN_SYM (cpu_open_1) PARAMS ((const char *mach_name_,
+ enum cgen_endian endian_));
-#ifdef BFD_VERSION /* Don't require bfd.h unnecessarily. */
-extern const char *
-CGEN_SYM (insert_operand) PARAMS ((int, CGEN_FIELDS *, char *, bfd_vma));
-#endif
+/* Close it. */
+
+extern void CGEN_SYM (cpu_close) PARAMS ((CGEN_CPU_DESC));
+
+/* Initialize the opcode table for use.
+ Called by init_asm/init_dis. */
+
+extern void CGEN_SYM (init_opcode_table) PARAMS ((CGEN_CPU_DESC cd_));
+
+/* Initialize the ibld table for use.
+ Called by init_asm/init_dis. */
+
+extern void CGEN_SYM (init_ibld_table) PARAMS ((CGEN_CPU_DESC cd_));
+
+/* Initialize an cpu table for assembler or disassembler use.
+ These must be called immediately after cpu_open. */
+
+extern void CGEN_SYM (init_asm) PARAMS ((CGEN_CPU_DESC));
+extern void CGEN_SYM (init_dis) PARAMS ((CGEN_CPU_DESC));
+
+/* Initialize the operand instance table for use. */
+
+extern void CGEN_SYM (init_opinst_table) PARAMS ((CGEN_CPU_DESC cd_));
+
+/* Assemble an instruction. */
+
+extern const CGEN_INSN * CGEN_SYM (assemble_insn)
+ PARAMS ((CGEN_CPU_DESC, const char *, CGEN_FIELDS *,
+ CGEN_INSN_BYTES_PTR, char **));
+
+extern const CGEN_KEYWORD CGEN_SYM (operand_mach);
+extern int CGEN_SYM (get_mach) PARAMS ((const char *));
-/* Read in a cpu description file. */
-extern const char * cgen_read_cpu_file PARAMS ((const char *));
+/* Operand index computation. */
+extern const CGEN_INSN * cgen_lookup_insn
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN * insn_,
+ CGEN_INSN_INT int_value_, unsigned char *bytes_value_,
+ int length_, CGEN_FIELDS *fields_, int alias_p_));
+extern void cgen_get_insn_operands
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN * insn_,
+ const CGEN_FIELDS *fields_, int *indices_));
+extern const CGEN_INSN * cgen_lookup_get_insn_operands
+ PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *insn_,
+ CGEN_INSN_INT int_value_, unsigned char *bytes_value_,
+ int length_, int *indices_, CGEN_FIELDS *fields_));
+
+/* Cover fns to bfd_get/set. */
+
+extern CGEN_INSN_INT cgen_get_insn_value
+ PARAMS ((CGEN_CPU_DESC, unsigned char *, int));
+extern void cgen_put_insn_value
+ PARAMS ((CGEN_CPU_DESC, unsigned char *, int, CGEN_INSN_INT));
+
+/* Read in a cpu description file.
+ ??? For future concerns, including adding instructions to the assembler/
+ disassembler at run-time. */
+
+extern const char * cgen_read_cpu_file
+ PARAMS ((CGEN_CPU_DESC, const char * filename_));
+
+/* Allow signed overflow of instruction fields. */
+extern void cgen_set_signed_overflow_ok PARAMS ((CGEN_CPU_DESC));
+
+/* Generate an error message if a signed field in an instruction overflows. */
+extern void cgen_clear_signed_overflow_ok PARAMS ((CGEN_CPU_DESC));
+
+/* Will an error message be generated if a signed field in an instruction overflows ? */
+extern unsigned int cgen_signed_overflow_ok_p PARAMS ((CGEN_CPU_DESC));
#endif /* CGEN_H */
projects / deliverable / binutils-gdb.git / blobdiff