nonbool: values of non-boolean attributes
There is a maximum of 32 attributes total. */
#define CGEN_ATTR_TYPE(n) \
-const struct { unsigned char num_nonbools; \
- unsigned int bool; \
- unsigned int nonbool[(n) ? (n) : 1]; }
+struct { unsigned char num_nonbools; \
+ unsigned int bool; \
+ unsigned int nonbool[(n) ? (n) : 1]; }
/* 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)
+
/* 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. */
typedef struct
{
const char * name;
- int value;
+ int value;
} CGEN_ATTR_ENTRY;
/* For each domain (fld,operand,insn), list of attributes. */
typedef struct
{
- const char * name;
+ const char * name;
/* NULL for boolean attributes. */
const CGEN_ATTR_ENTRY * vals;
} CGEN_ATTR_TABLE;
/* 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). */
+ 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
#endif
/* Called before trying to match a table entry with the insn. */
-void cgen_init_parse_operand PARAMS ((void));
+extern void cgen_init_parse_operand PARAMS ((void));
/* Called from <cpu>-asm.c to initialize operand parsing. */
but rather that we need to put them somewhere. */
/* Call this from md_assemble to initialize the assembler callback. */
-void cgen_asm_init_parse PARAMS ((void));
+extern void cgen_asm_init_parse PARAMS ((void));
/* Don't require bfd.h unnecessarily. */
#ifdef BFD_VERSION
/* The result is an error message or NULL for success.
The parsed value is stored in the bfd_vma *. */
-const char * cgen_parse_operand PARAMS ((enum cgen_parse_operand_type,
- const char **, int, int,
- enum cgen_parse_operand_result *,
- bfd_vma *));
+extern const char * cgen_parse_operand
+ PARAMS ((enum cgen_parse_operand_type,
+ const char **, int, int,
+ enum cgen_parse_operand_result *,
+ bfd_vma *));
#endif
-void cgen_save_fixups PARAMS ((void));
-void cgen_restore_fixups PARAMS ((void));
-void cgen_swap_fixups PARAMS ((void));
+extern void cgen_save_fixups PARAMS ((void));
+extern void cgen_restore_fixups PARAMS ((void));
+extern void cgen_swap_fixups PARAMS ((void));
/* Add a register to the assembler's hash table.
This makes lets GAS parse registers for us.
??? This isn't currently used, but it could be in the future. */
-void cgen_asm_record_register PARAMS ((char *, int));
+extern void cgen_asm_record_register PARAMS ((char *, int));
/* After CGEN_SYM (assemble_insn) is done, this is called to
output the insn and record any fixups. The address of the
assembled instruction is returned in case it is needed by
the caller. */
-char * cgen_asm_finish_insn PARAMS ((const struct cgen_insn *, cgen_insn_t *,
- unsigned int));
+extern char * cgen_asm_finish_insn PARAMS ((const struct cgen_insn *,
+ cgen_insn_t *, unsigned int, int));
\f
/* Operand values (keywords, integers, symbols, etc.) */
{
/* 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;
+ int type;
const struct cgen_hw_entry * next;
- char * name;
- enum cgen_asm_type asm_type;
- PTR asm_data;
+ char * name;
+ enum cgen_asm_type asm_type;
+ PTR asm_data;
} CGEN_HW_ENTRY;
-const CGEN_HW_ENTRY * cgen_hw_lookup PARAMS ((const char *));
+extern const CGEN_HW_ENTRY * cgen_hw_lookup PARAMS ((const char *));
/* This struct is used to describe things like register names, etc. */
#ifndef CGEN_KEYWORD_NBOOL_ATTRS
#define CGEN_KEYWORD_NBOOL_ATTRS 1
#endif
- CGEN_ATTR_TYPE (CGEN_KEYWORD_NBOOL_ATTRS) attrs;
+ const CGEN_ATTR_TYPE (CGEN_KEYWORD_NBOOL_ATTRS) attrs;
/* Next name hash table entry. */
struct cgen_keyword_entry *next_name;
/* Operand value support routines. */
/* FIXME: some of the long's here will need to be bfd_vma or some such. */
-const char * cgen_parse_keyword PARAMS ((const char **,
- CGEN_KEYWORD *,
- long *));
-const char * cgen_parse_signed_integer PARAMS ((const char **, int, long *));
-const char * cgen_parse_unsigned_integer PARAMS ((const char **, int,
- unsigned long *));
-const char * cgen_parse_address PARAMS ((const char **, int, int,
- enum cgen_parse_operand_result *,
- long *));
-const char * cgen_validate_signed_integer PARAMS ((long, long, long));
-const char * cgen_validate_unsigned_integer PARAMS ((unsigned long,
- unsigned long,
- unsigned long));
+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));
\f
/* Operand modes. */
#ifndef CGEN_OPERAND_NBOOL_ATTRS
#define CGEN_OPERAND_NBOOL_ATTRS 1
#endif
- CGEN_ATTR_TYPE (CGEN_OPERAND_NBOOL_ATTRS) attrs;
+ const CGEN_ATTR_TYPE (CGEN_OPERAND_NBOOL_ATTRS) attrs;
#define CGEN_OPERAND_ATTRS(operand) (&(operand)->attrs)
} CGEN_OPERAND;
struct cgen_insn
{
- /* ??? Further table size reductions can be had by moving this element
- either to the format table or to a separate table of its own. Not
- sure this is desirable yet. */
+ /* This field is an array of functions that operand on this entry. */
struct cgen_base base;
-
-/* Given a pointer to a cgen_insn struct, return a pointer to `base'. */
#define CGEN_INSN_BASE(insn) (&(insn)->base)
+ /* Each real instruction is enumerated. This is used, for example, to do
+ insn profiling in the simulator.
+ Macro-insns are not enumerated. The simulator doesn't use them and there
+ is currently no other need for it. */
+ int num;
+#define CGEN_INSN_NUM(insn) ((insn)->num)
+
/* 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. */
#define CGEN_INSN_VALUE(insn) ((insn)->value)
#define CGEN_INSN_MASK(insn) ((insn)->format.mask)
- /* Pointer to NULL entry terminated table of operands used,
- or NULL if none. */
- const CGEN_OPERAND_INSTANCE *operands;
-#define CGEN_INSN_OPERANDS(insn) ((insn)->operands)
+ /* 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)
/* Attributes.
This must appear last. It is a variable sized array in that one
#ifndef CGEN_INSN_NBOOL_ATTRS
#define CGEN_INSN_NBOOL_ATTRS 1
#endif
- CGEN_ATTR_TYPE (CGEN_INSN_NBOOL_ATTRS) attrs;
+ const CGEN_ATTR_TYPE (CGEN_INSN_NBOOL_ATTRS) attrs;
#define CGEN_INSN_ATTRS(insn) (&(insn)->attrs)
/* Return value of attribute ATTR in INSN. */
#define CGEN_INSN_ATTR(insn, attr) \
/* Values added at runtime. */
CGEN_INSN_LIST * new_entries;
-
- /* Assembler hash function. */
- unsigned int (* asm_hash) PARAMS ((const char *));
-
- /* Number of entries in assembler hash table. */
- unsigned int asm_hash_table_size;
-
- /* Disassembler hash function. */
- unsigned int (* dis_hash) PARAMS ((const char *, unsigned long));
-
- /* Number of entries in disassembler hash table. */
- unsigned int dis_hash_table_size;
} CGEN_INSN_TABLE;
-/* ??? This is currently used by the simulator.
- We want this to be fast and the simulator currently doesn't handle
- runtime added instructions so this is ok. An alternative would be to
- store the index in the table. */
+/* ??? This is currently used by the simulator. */
extern const CGEN_INSN CGEN_SYM (insn_table_entries)[];
-#define CGEN_INSN_INDEX(insn) ((int) ((insn) - CGEN_SYM (insn_table_entries)))
-#define CGEN_INSN_ENTRY(n) (& CGEN_SYM (insn_table_entries) [n])
/* Return number of instructions. This includes any added at runtime. */
-int cgen_insn_count PARAMS ((void));
-
+extern int cgen_insn_count PARAMS ((void));
+\f
+/* Macro instructions.
+ Macro insns aren't real insns, they map to one or more real insns.
+ E.g. An architecture's "nop" insn may actually be an "mv r0,r0" or
+ some such.
+
+ Macro insns can expand to nothing (e.g. a nop that is optimized away).
+ This is useful in multi-insn macros that build a constant in a register.
+ Of course this isn't the default behaviour and must be explicitly enabled.
+
+ Assembly of macro-insns is relatively straightforward. Disassembly isn't.
+ However, disassembly of at least some kinds of macro insns is important
+ in order that the disassembled code preserve the readability of the original
+ insn. What is attempted here is to disassemble all "simple" macro-insns,
+ where "simple" is currently defined to mean "expands to one real insn".
+
+ Simple macro-insns are handled specially. They are emitted as ALIAS's
+ of real insns. This simplifies their handling since there's usually more
+ of them than any other kind of macro-insn, and proper disassembly of them
+ falls out for free. */
+
+/* For each macro-insn there may be multiple expansion possibilities,
+ depending on the arguments. This structure is accessed via the `data'
+ member of CGEN_INSN. */
+
+typedef struct cgen_minsn_expansion {
+ /* Function to do the expansion.
+ If the expansion fails (e.g. "no match") NULL is returned.
+ 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 **));
+#define CGEN_MIEXPN_FN(ex) ((ex)->fn)
+
+ /* Instruction(s) the macro expands to.
+ The format of STR is defined by FN.
+ It is typically the assembly code of the real insn, but it could also be
+ the original Scheme expression or a tokenized form of it (with FN being
+ an appropriate interpreter). */
+ const char * str;
+#define CGEN_MIEXPN_STR(ex) ((ex)->str)
+} CGEN_MINSN_EXPANSION;
+
+/* Normal expander.
+ When supported, this function will convert the input string to another
+ string and the parser will be invoked recursively. The output string
+ may contain further macro invocations. */
+
+extern const char * cgen_expand_macro_insn
+ PARAMS ((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).
- The index of each entry is the index of the corresponding table entry.
- The value of each entry is the index of the next entry, with a 0
- terminating (thus the first entry is reserved). */
+ 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
-#ifdef CGEN_MNEMONIC_OPERANDS
#define CGEN_ASM_HASH_SIZE 127
-#define CGEN_ASM_HASH(string) (*(unsigned char *) (string) % CGEN_ASM_HASH_SIZE)
+#ifdef CGEN_MNEMONIC_OPERANDS
+#define CGEN_ASM_HASH(mnem) (*(unsigned char *) (mnem) % CGEN_ASM_HASH_SIZE)
#else
-#define CGEN_ASM_HASH_SIZE 128
-#define CGEN_ASM_HASH(string) (*(unsigned char *) (string) % CGEN_ASM_HASH_SIZE) /*FIXME*/
+#define CGEN_ASM_HASH(mnem) (*(unsigned char *) (mnem) % CGEN_ASM_HASH_SIZE) /*FIXME*/
#endif
#endif
-unsigned int CGEN_SYM (asm_hash_insn) PARAMS ((const char *));
-CGEN_INSN_LIST * cgen_asm_lookup_insn PARAMS ((const char *));
-#define CGEN_ASM_LOOKUP_INSN(insn) cgen_asm_lookup_insn (insn)
+extern CGEN_INSN_LIST * cgen_asm_lookup_insn PARAMS ((const char *));
+#define CGEN_ASM_LOOKUP_INSN(string) cgen_asm_lookup_insn (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.
- INSN is the first CGEN_BASE_INSN_SIZE bytes as an int in host order. */
+ 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, insn) (*(unsigned char *) (buffer))
+#define CGEN_DIS_HASH(buffer, value) (*(unsigned char *) (buffer))
#endif
-unsigned int CGEN_SYM (dis_hash_insn) PARAMS ((const char *, unsigned long));
-CGEN_INSN_LIST * cgen_dis_lookup_insn PARAMS ((const char *, unsigned long));
-#define CGEN_DIS_LOOKUP_INSN(buf, insn) cgen_dis_lookup_insn (buf, insn)
+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))
#define CGEN_DIS_NEXT_INSN(insn) ((insn)->next)
\f
/* Top level structures and functions. */
typedef struct
{
- const CGEN_HW_ENTRY * hw_list;
+ const CGEN_HW_ENTRY * hw_list;
+
/*CGEN_OPERAND_TABLE * operand_table; - FIXME:wip */
- CGEN_INSN_TABLE * insn_table;
-} CGEN_OPCODE_DATA;
+
+ CGEN_INSN_TABLE * insn_table;
+
+ /* Macro instructions are defined separately and are combined with real
+ insns during hash table computation. */
+ CGEN_INSN_TABLE * macro_insn_table;
+
+ /* Return non-zero if insn should be added to hash table. */
+ int (* asm_hash_p) PARAMS ((const CGEN_INSN *));
+
+ /* Assembler hash function. */
+ unsigned int (* asm_hash) PARAMS ((const char *));
+
+ /* Number of entries in assembler hash table. */
+ unsigned int asm_hash_table_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));
+
+ /* Number of entries in disassembler hash table. */
+ unsigned int dis_hash_table_size;
+} CGEN_OPCODE_TABLE;
/* Each CPU has one of these. */
-extern CGEN_OPCODE_DATA CGEN_SYM (opcode_data);
+extern const CGEN_OPCODE_TABLE CGEN_SYM (opcode_table);
/* Global state access macros.
Some of these are tucked away and accessed with cover fns.
/* Prototypes of major functions. */
/* Set the current cpu (+ mach number, endian, etc.). */
-void cgen_set_cpu PARAMS ((CGEN_OPCODE_DATA *, int, enum cgen_endian));
+extern void cgen_set_cpu PARAMS ((const CGEN_OPCODE_TABLE *, int,
+ enum cgen_endian));
/* Initialize the assembler, disassembler. */
-void cgen_asm_init PARAMS ((void));
-void cgen_dis_init PARAMS ((void));
+extern void cgen_asm_init PARAMS ((void));
+extern void cgen_dis_init PARAMS ((void));
/* `init_tables' must be called before `xxx_supported'. */
-void CGEN_SYM (init_tables) PARAMS ((int));
-void CGEN_SYM (init_asm) PARAMS ((int, enum cgen_endian));
-void CGEN_SYM (init_dis) PARAMS ((int, enum cgen_endian));
-void CGEN_SYM (init_parse) PARAMS ((void));
-void CGEN_SYM (init_print) PARAMS ((void));
-void CGEN_SYM (init_insert) PARAMS ((void));
-void CGEN_SYM (init_extract) PARAMS ((void));
+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 *? */
-const struct cgen_insn *
+extern const struct cgen_insn *
CGEN_SYM (assemble_insn) PARAMS ((const char *, CGEN_FIELDS *,
cgen_insn_t *, char **));
#if 0 /* old */
-int CGEN_SYM (insn_supported) PARAMS ((const struct cgen_insn *));
-int CGEN_SYM (opval_supported) PARAMS ((const struct cgen_opval *));
+extern int CGEN_SYM (insn_supported) PARAMS ((const struct cgen_insn *));
+extern int CGEN_SYM (opval_supported) PARAMS ((const struct cgen_opval *));
#endif
extern const CGEN_KEYWORD CGEN_SYM (operand_mach);
-int CGEN_SYM (get_mach) PARAMS ((const char *));
+extern int CGEN_SYM (get_mach) PARAMS ((const char *));
-const CGEN_INSN *
-CGEN_SYM (get_insn_operands) PARAMS ((const CGEN_INSN *, cgen_insn_t,
- int, int *));
-const CGEN_INSN *
+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 *));
CGEN_INLINE void
CGEN_SYM (put_operand) PARAMS ((int, const long *,
CGEN_INLINE long
CGEN_SYM (get_operand) PARAMS ((int, const CGEN_FIELDS *));
-const char *
+extern const char *
CGEN_SYM (parse_operand) PARAMS ((int, const char **, CGEN_FIELDS *));
-const char *
+extern const char *
CGEN_SYM (insert_operand) PARAMS ((int, CGEN_FIELDS *, char *));
/* Default insn parser, printer. */
extern cgen_print_fn CGEN_SYM (print_insn);
/* Read in a cpu description file. */
-const char * cgen_read_cpu_file PARAMS ((const char *));
+extern const char * cgen_read_cpu_file PARAMS ((const char *));
#endif /* CGEN_H */
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