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Diffstat (limited to 'include/opcode/msp430-decode.h')
| -rw-r--r-- | include/opcode/msp430-decode.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/include/opcode/msp430-decode.h b/include/opcode/msp430-decode.h new file mode 100644 index 0000000..0653ade --- /dev/null +++ b/include/opcode/msp430-decode.h @@ -0,0 +1,130 @@ +/* Opcode decoder for the TI MSP430 + Copyright 2012-2013 Free Software Foundation, Inc. + Written by DJ Delorie <dj@redhat.com> + + This file is part of GDB, the GNU Debugger. + + This program 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 3 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ + +typedef enum +{ + MSO_unknown, + /* Double-operand instructions - all repeat .REPEATS times. */ + MSO_mov, /* dest = src */ + MSO_add, /* dest += src */ + MSO_addc, /* dest += src + carry */ + MSO_subc, /* dest -= (src-1) + carry */ + MSO_sub, /* dest -= src */ + MSO_cmp, /* dest - src -> status */ + MSO_dadd, /* dest += src (as BCD) */ + MSO_bit, /* dest & src -> status */ + MSO_bic, /* dest &= ~src (bit clear) */ + MSO_bis, /* dest |= src (bit set, OR) */ + MSO_xor, /* dest ^= src */ + MSO_and, /* dest &= src */ + + /* Single-operand instructions. */ + MSO_rrc, /* Rotate through carry, dest >>= .REPEATS. */ + MSO_swpb, /* Swap lower bytes of operand. */ + MSO_rra, /* Signed shift dest >>= .REPEATS. */ + MSO_sxt, /* Sign extend lower byte. */ + MSO_push, /* Push .REPEATS registers (or other op) starting at SRC going towards R0. */ + MSO_pop, /* Pop .REPEATS registers starting at DEST going towards R15. */ + MSO_call, + MSO_reti, + + /* Jumps. */ + MSO_jmp, /* PC = SRC if .COND true. */ + + /* Extended single-operand instructions. */ + MSO_rru, /* Unsigned shift right, dest >>= .REPEATS. */ + +} MSP430_Opcode_ID; + +typedef enum +{ + MSP430_Operand_None, + MSP430_Operand_Immediate, + MSP430_Operand_Register, + MSP430_Operand_Indirect, + MSP430_Operand_Indirect_Postinc +} MSP430_Operand_Type; + +typedef enum +{ + MSR_0 = 0, + MSR_PC = 0, + MSR_SP = 1, + MSR_SR = 2, + MSR_CG = 3, + MSR_None = 16, +} MSP430_Register; + +typedef struct +{ + MSP430_Operand_Type type; + int addend; + MSP430_Register reg : 8; + MSP430_Register reg2 : 8; + unsigned char bit_number : 4; + unsigned char condition : 3; +} MSP430_Opcode_Operand; + +typedef enum +{ + MSP430_Byte = 0, + MSP430_Word, + MSP430_Addr +} MSP430_Size; + +/* These numerically match the bit encoding. */ +typedef enum +{ + MSC_nz = 0, + MSC_z, + MSC_nc, + MSC_c, + MSC_n, + MSC_ge, + MSC_l, + MSC_true, +} MSP430_Condition; + +#define MSP430_FLAG_C 0x01 +#define MSP430_FLAG_Z 0x02 +#define MSP430_FLAG_N 0x04 +#define MSP430_FLAG_V 0x80 + +typedef struct +{ + int lineno; + MSP430_Opcode_ID id; + unsigned flags_1:8; /* These flags are set to '1' by the insn. */ + unsigned flags_0:8; /* These flags are set to '0' by the insn. */ + unsigned flags_set:8; /* These flags are set appropriately by the insn. */ + unsigned zc:1; /* If set, pretend the carry bit is zero. */ + unsigned repeat_reg:1; /* If set, count is in REG[repeats]. */ + unsigned ofs_430x:1; /* If set, the offset in any operand is 430x (else use 430 compatibility mode). */ + unsigned repeats:5; /* Contains COUNT-1, or register number. */ + int n_bytes; /* Opcode size in BYTES. */ + char * syntax; + MSP430_Size size; /* Operand size in BITS. */ + MSP430_Condition cond; + /* By convention, these are [0]destination, [1]source. */ + MSP430_Opcode_Operand op[2]; +} MSP430_Opcode_Decoded; + +int msp430_decode_opcode (unsigned long, MSP430_Opcode_Decoded *, int (*)(void *), void *); |