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Diffstat (limited to 'include/opcode/tic80.h')
| -rw-r--r-- | include/opcode/tic80.h | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/include/opcode/tic80.h b/include/opcode/tic80.h new file mode 100644 index 000000000..b99bc30b8 --- /dev/null +++ b/include/opcode/tic80.h @@ -0,0 +1,277 @@ +/* tic80.h -- Header file for TI TMS320C80 (MV) opcode table + Copyright 1996, 1997, 1999 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; + + /* Special purpose flags for this opcode. */ + + unsigned char flags; + + /* 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 & TIC80_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. + + Note that flags for all predefined symbols, such as the general purpose + registers (ex: r10), control registers (ex: FPST), condition codes (ex: + eq0.b), bit numbers (ex: gt.b), etc are large enough that they can be + or'd into an int where the lower bits contain the actual numeric value + that correponds to this predefined symbol. This way a single int can + contain both the value of the symbol and it's type. + */ + +/* This operand must be an even register number. Floating point numbers + for example are stored in even/odd register pairs. */ + +#define TIC80_OPERAND_EVEN (1 << 0) + +/* This operand must be an odd register number and must be one greater than + the register number of the previous operand. I.E. the second register in + an even/odd register pair. */ + +#define TIC80_OPERAND_ODD (1 << 1) + +/* This operand takes signed values. */ + +#define TIC80_OPERAND_SIGNED (1 << 2) + +/* This operand may be either a predefined constant name or a numeric value. + An example would be a condition code like "eq0.b" which has the numeric + value 0x2. */ + +#define TIC80_OPERAND_NUM (1 << 3) + +/* This operand should be wrapped in parentheses rather than separated + from the previous 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 (1 << 4) + +/* This operand is a PC relative branch offset. The disassembler prints + these symbolically if possible. Note that the offsets are taken as word + offsets. */ + +#define TIC80_OPERAND_PCREL (1 << 5) + +/* 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 (1 << 6) + +/* This operand may have a ":m" modifier specified by bit 17 in a short + immediate form instruction. */ + +#define TIC80_OPERAND_M_SI (1 << 7) + +/* This operand may have a ":m" modifier specified by bit 15 in a long + immediate or register form instruction. */ + +#define TIC80_OPERAND_M_LI (1 << 8) + +/* This operand may have a ":s" modifier specified in bit 11 in a long + immediate or register form instruction. */ + +#define TIC80_OPERAND_SCALED (1 << 9) + +/* This operand is a floating point value */ + +#define TIC80_OPERAND_FLOAT (1 << 10) + +/* This operand is an byte offset from a base relocation. The lower + two bits of the final relocated address are ignored when the value is + written to the program counter. */ + +#define TIC80_OPERAND_BASEREL (1 << 11) + +/* This operand is an "endmask" field for a shift instruction. + It is treated special in that it can have values of 0-32, + where 0 and 32 result in the same instruction. The assembler + must be able to accept both endmask values. This disassembler + has no way of knowing from the instruction which value was + given at assembly time, so it just uses '0'. */ + +#define TIC80_OPERAND_ENDMASK (1 << 12) + +/* This operand is one of the 32 general purpose registers. + The disassembler prints these with a leading 'r'. */ + +#define TIC80_OPERAND_GPR (1 << 27) + +/* This operand is a floating point accumulator register. + The disassembler prints these with a leading 'a'. */ + +#define TIC80_OPERAND_FPA ( 1 << 28) + +/* This operand is a control register number, either numeric or + symbolic (like "EIF", "EPC", etc). + The disassembler prints these symbolically. */ + +#define TIC80_OPERAND_CR (1 << 29) + +/* This operand is a condition code, either numeric or + symbolic (like "eq0.b", "ne0.w", etc). + The disassembler prints these symbolically. */ + +#define TIC80_OPERAND_CC (1 << 30) + +/* This operand is a bit number, either numeric or + symbolic (like "eq.b", "or.f", etc). + The disassembler prints these symbolically. + Note that they appear in the instruction in 1's complement relative + to the values given in the manual. */ + +#define TIC80_OPERAND_BITNUM (1 << 31) + +/* This mask is used to strip operand bits from an int that contains + both operand bits and a numeric value in the lsbs. */ + +#define TIC80_OPERAND_MASK (TIC80_OPERAND_GPR | TIC80_OPERAND_FPA | TIC80_OPERAND_CR | TIC80_OPERAND_CC | TIC80_OPERAND_BITNUM) + + +/* Flag bits for the struct tic80_opcode flags field. */ + +#define TIC80_VECTOR 01 /* Is a vector instruction */ +#define TIC80_NO_R0_DEST 02 /* Register r0 cannot be a destination register */ + + +/* The opcodes library contains a table that allows translation from predefined + symbol names to numeric values, and vice versa. */ + +/* Structure to hold information about predefined symbols. */ + +struct predefined_symbol +{ + char *name; /* name to recognize */ + int value; +}; + +#define PDS_NAME(pdsp) ((pdsp) -> name) +#define PDS_VALUE(pdsp) ((pdsp) -> value) + +extern const struct predefined_symbol tic80_predefined_symbols[]; /* Translation array */ +extern const int tic80_num_predefined_symbols; /* How many members in the array */ + +const char *tic80_value_to_symbol PARAMS ((int val, int class)); /* Translate value to symbolic name */ +int tic80_symbol_to_value PARAMS ((char *name, int class)); /* Translate symbolic name to value */ + +const struct predefined_symbol * +tic80_next_predefined_symbol PARAMS ((const struct predefined_symbol *)); + +#endif /* TIC80_H */ |