/* tic80.h -- Header file for TI TMS320C80 (MV) opcode table Copyright 1996, 1997 Free Software Foundation, Inc. Written by Fred Fish (fnf@cygnus.com), Cygnus Support This file is part of GDB, GAS, and the GNU binutils. GDB, GAS, and the GNU binutils are free software; you can redistribute them and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version. GDB, GAS, and the GNU binutils are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this file; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef TIC80_H #define TIC80_H /* The opcode table is an array of struct tic80_opcode. */ struct tic80_opcode { /* The opcode name. */ const char *name; /* The opcode itself. Those bits which will be filled in with operands are zeroes. */ unsigned long opcode; /* The opcode mask. This is used by the disassembler. This is a mask containing ones indicating those bits which must match the opcode field, and zeroes indicating those bits which need not match (and are presumably filled in by operands). */ unsigned long mask; /* The format of this opcode. I.E. short-immediate, register, long immediate, etc. FIXME: Will this ever be used? */ unsigned char format; /* An array of operand codes. Each code is an index into the operand table. They appear in the order which the operands must appear in assembly code, and are terminated by a zero. FIXME: Adjust size to match actual requirements when TIc80 support is complete */ unsigned char operands[8]; }; /* The table itself is sorted by major opcode number, and is otherwise in the order in which the disassembler should consider instructions. FIXME: This isn't currently true. */ extern const struct tic80_opcode tic80_opcodes[]; extern const int tic80_num_opcodes; /* The operands table is an array of struct tic80_operand. */ struct tic80_operand { /* The number of bits in the operand. */ int bits; /* How far the operand is left shifted in the instruction. */ int shift; /* 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 |= (op & ((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 (most operands can accept any value). */ unsigned long (*insert) PARAMS ((unsigned long instruction, long op, 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 & PPC_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. */ long (*extract) PARAMS ((unsigned long instruction, int *invalid)); /* One bit syntax flags. */ unsigned long flags; }; /* Elements in the table are retrieved by indexing with values from the operands field of the tic80_opcodes table. */ extern const struct tic80_operand tic80_operands[]; /* Values defined for the flags field of a struct tic80_operand. */ /* This operand takes signed values. */ #define TIC80_OPERAND_SIGNED (01) /* The next operand should be wrapped in parentheses rather than separated from this one by a comma. This is used for various instructions, like the load and store instructions, which want their operands to look like "displacement(reg)" */ #define TIC80_OPERAND_PARENS (02) /* This operand may use the symbolic names for the condition and size codes that the branch instructions use, such as "eq.b", "or.f", etc. */ #define TIC80_OPERAND_CC_SZ (04) /* This operand names a register. The disassembler uses this to print register names with a leading 'r'. */ #define TIC80_OPERAND_GPR (010) /* This operand names a floating point accumulator register. The disassembler prints these with a leading 'a'. */ #define TIC80_OPERAND_FPA (020) /* This operand is a relative branch displacement. The disassembler prints these symbolically if possible. */ #define TIC80_OPERAND_RELATIVE (040) /* This flag is a hint to the disassembler for using hex as the prefered printing format, even for small positive or negative immediate values. Normally values in the range -999 to 999 are printed as signed decimal values and other values are printed in hex. */ #define TIC80_OPERAND_BITFIELD (0100) /* Values which go in the struct tic80_opcode format field to distinguish between various types of instructions with the same mnemonic. FIXME: Not currently used? */ #define FMT_UNUSED 0 /* Unused */ #define FMT_SI 1 /* Short immediate format */ #define FMT_LI 2 /* Long immediate format */ #define FMT_REG 3 /* Register format */ #endif /* TIC80_H */