include/opcode/msp430-decode.h

   1 /* Opcode decoder for the TI MSP430
   2    Copyright (C) 2012-2015 Free Software Foundation, Inc.
   3    Written by DJ Delorie <dj@redhat.com>
   4
   5    This file is part of GDB, the GNU Debugger.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 typedef enum
  23 {
  24   MSO_unknown,
  25   /* Double-operand instructions - all repeat .REPEATS times. */
  26   MSO_mov,      /* dest = src */
  27   MSO_add,      /* dest += src */
  28   MSO_addc,     /* dest += src + carry */
  29   MSO_subc,     /* dest -= (src-1) + carry */
  30   MSO_sub,      /* dest -= src */
  31   MSO_cmp,      /* dest - src -> status */
  32   MSO_dadd,     /* dest += src (as BCD) */
  33   MSO_bit,      /* dest & src -> status */
  34   MSO_bic,      /* dest &= ~src (bit clear) */
  35   MSO_bis,      /* dest |= src (bit set, OR) */
  36   MSO_xor,      /* dest ^= src */
  37   MSO_and,      /* dest &= src */
  38
  39   /* Single-operand instructions.  */
  40   MSO_rrc,      /* Rotate through carry, dest >>= .REPEATS.  */
  41   MSO_swpb,     /* Swap lower bytes of operand.  */
  42   MSO_rra,      /* Signed shift dest >>= .REPEATS.  */
  43   MSO_sxt,      /* Sign extend lower byte.  */
  44   MSO_push,     /* Push .REPEATS registers (or other op) starting at SRC going towards R0.  */
  45   MSO_pop,      /* Pop .REPEATS registers starting at DEST going towards R15.  */
  46   MSO_call,
  47   MSO_reti,
  48
  49   /* Jumps.  */
  50   MSO_jmp,      /* PC = SRC if .COND true.  */
  51
  52   /* Extended single-operand instructions.  */
  53   MSO_rru,      /* Unsigned shift right, dest >>= .REPEATS.  */
  54
  55 } MSP430_Opcode_ID;
  56
  57 typedef enum
  58 {
  59   MSP430_Operand_None,
  60   MSP430_Operand_Immediate,
  61   MSP430_Operand_Register,
  62   MSP430_Operand_Indirect,
  63   MSP430_Operand_Indirect_Postinc
  64 } MSP430_Operand_Type;
  65
  66 typedef enum
  67 {
  68   MSR_0 = 0,
  69   MSR_PC = 0,
  70   MSR_SP = 1,
  71   MSR_SR = 2,
  72   MSR_CG = 3,
  73   MSR_None = 16,
  74 } MSP430_Register;
  75
  76 typedef struct
  77 {
  78   MSP430_Operand_Type  type;
  79   int                  addend;
  80   MSP430_Register      reg : 8;
  81   MSP430_Register      reg2 : 8;
  82   unsigned char        bit_number : 4;
  83   unsigned char        condition : 3;
  84 } MSP430_Opcode_Operand;
  85
  86 typedef enum
  87 {
  88   MSP430_Byte = 0,
  89   MSP430_Word,
  90   MSP430_Addr
  91 } MSP430_Size;
  92
  93 /* These numerically match the bit encoding.  */
  94 typedef enum
  95 {
  96   MSC_nz = 0,
  97   MSC_z,
  98   MSC_nc,
  99   MSC_c,
 100   MSC_n,
 101   MSC_ge,
 102   MSC_l,
 103   MSC_true,
 104 } MSP430_Condition;
 105
 106 #define MSP430_FLAG_C   0x01
 107 #define MSP430_FLAG_Z   0x02
 108 #define MSP430_FLAG_N   0x04
 109 #define MSP430_FLAG_V   0x80
 110
 111 typedef struct
 112 {
 113   int lineno;
 114   MSP430_Opcode_ID      id;
 115   unsigned              flags_1:8;      /* These flags are set to '1' by the insn.  */
 116   unsigned              flags_0:8;      /* These flags are set to '0' by the insn.  */
 117   unsigned              flags_set:8;    /* These flags are set appropriately by the insn.  */
 118   unsigned              zc:1;           /* If set, pretend the carry bit is zero.  */
 119   unsigned              repeat_reg:1;   /* If set, count is in REG[repeats].  */
 120   unsigned              ofs_430x:1;     /* If set, the offset in any operand is 430x (else use 430 compatibility mode).  */
 121   unsigned              repeats:5;      /* Contains COUNT-1, or register number.  */
 122   int                   n_bytes;        /* Opcode size in BYTES.  */
 123   char *                syntax;
 124   MSP430_Size           size;           /* Operand size in BITS.  */
 125   MSP430_Condition      cond;
 126   /* By convention, these are [0]destination, [1]source.  */
 127   MSP430_Opcode_Operand op[2];
 128 } MSP430_Opcode_Decoded;
 129
 130 int msp430_decode_opcode (unsigned long, MSP430_Opcode_Decoded *, int (*)(void *), void *);