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Diffstat (limited to 'include/opcode/arc.h')
| -rw-r--r-- | include/opcode/arc.h | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/include/opcode/arc.h b/include/opcode/arc.h new file mode 100644 index 0000000..a1e0ca1 --- /dev/null +++ b/include/opcode/arc.h @@ -0,0 +1,274 @@ +/* Opcode table for the ARC. + Copyright 1994, 1995, 1997 Free Software Foundation, Inc. + Contributed by Doug Evans (dje@cygnus.com). + +This file is part of GAS, the GNU Assembler, GDB, the GNU debugger, and +the GNU Binutils. + +GAS/GDB 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/GDB 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 or GDB; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, 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. + + This duplicates bfd_mach_arc_xxx. For now I wish to isolate this from bfd + and bfd from this. Also note that these numbers are bit values as we want + to allow for things available on more than one ARC (but not necessarily all + ARCs). */ + +/* The `base' cpu must be 0 (table entries are omitted for the base cpu). + The cpu type is treated independently of endianness. + The complete `mach' number includes endianness. + These values are internal to opcodes/bfd/binutils/gas. */ +#define ARC_MACH_BASE 0 +#define ARC_MACH_UNUSED1 1 +#define ARC_MACH_UNUSED2 2 +#define ARC_MACH_UNUSED4 4 +/* Additional cpu values can be inserted here and ARC_MACH_BIG moved down. */ +#define ARC_MACH_BIG 8 + +/* Mask of number of bits necessary to record cpu type. */ +#define ARC_MACH_CPU_MASK 7 +/* Mask of number of bits necessary to record cpu type + endianness. */ +#define ARC_MACH_MASK 15 + +/* Type to denote an ARC instruction (at least a 32 bit unsigned int). */ +typedef unsigned int arc_insn; + +struct arc_opcode { + char *syntax; /* syntax of insn */ + unsigned long mask, value; /* recognize insn if (op&mask)==value */ + int flags; /* various flag bits */ + +/* Values for `flags'. */ + +/* Return CPU number, given flag bits. */ +#define ARC_OPCODE_CPU(bits) ((bits) & ARC_MACH_CPU_MASK) +/* Return MACH number, given flag bits. */ +#define ARC_OPCODE_MACH(bits) ((bits) & ARC_MACH_MASK) +/* First opcode flag bit available after machine mask. */ +#define ARC_OPCODE_FLAG_START ((ARC_MACH_MASK + 1) << 0) +/* This insn is a conditional branch. */ +#define ARC_OPCODE_COND_BRANCH (ARC_OPCODE_FLAG_START) + + /* These values are used to optimize assembly and disassembly. Each insn is + on a list of related insns (same first letter for assembly, same insn code + for disassembly). */ + struct arc_opcode *next_asm; /* Next instruction to try during assembly. */ + struct arc_opcode *next_dis; /* Next instruction to try during disassembly. */ + + /* Macros to create the hash values for the lists. */ +#define ARC_HASH_OPCODE(string) \ + ((string)[0] >= 'a' && (string)[0] <= 'z' ? (string)[0] - 'a' : 26) +#define ARC_HASH_ICODE(insn) \ + ((unsigned int) (insn) >> 27) + + /* Macros to access `next_asm', `next_dis' so users needn't care about the + underlying mechanism. */ +#define ARC_OPCODE_NEXT_ASM(op) ((op)->next_asm) +#define ARC_OPCODE_NEXT_DIS(op) ((op)->next_dis) +}; + +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 CPU number, given flag bits. */ +#define ARC_OPVAL_CPU(bits) ((bits) & ARC_MACH_CPU_MASK) +/* 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_BRANCH 2 + +/* This operand is an absolute branch address. The disassembler + prints these symbolically if possible. */ +#define ARC_OPERAND_ABSOLUTE_BRANCH 4 + +/* This operand is an address. The disassembler + prints these symbolically if possible. */ +#define ARC_OPERAND_ADDRESS 8 + +/* This operand is a long immediate value. */ +#define ARC_OPERAND_LIMM 0x10 + +/* This operand takes signed values. */ +#define ARC_OPERAND_SIGNED 0x20 + +/* 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 0x40 + +/* 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 0x80 + +/* This operand doesn't really exist. The program uses these operands + in special ways. */ +#define ARC_OPERAND_FAKE 0x100 + +/* 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. */ + +/* CPU number, given value passed to `arc_init_opcode_tables'. */ +#define ARC_HAVE_CPU(bits) ((bits) & ARC_MACH_CPU_MASK) +/* 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 + +/* Delay slot types. */ +#define ARC_DELAY_NONE 0 /* no delay slot */ +#define ARC_DELAY_NORMAL 1 /* delay slot in both cases */ +#define ARC_DELAY_JUMP 2 /* delay slot only if branch taken */ + +/* 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. */ +int arc_get_opcode_mach PARAMS ((int, int)); +/* `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)); +const struct arc_opcode *arc_opcode_lookup_asm PARAMS ((const char *)); +const struct arc_opcode *arc_opcode_lookup_dis PARAMS ((unsigned int)); +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 *)); |