| /* 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 *)); |