source: trunk/libs/newlib/src/include/opcode/msp430-decode.h @ 444

Last change on this file since 444 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 3.8 KB
Line 
1/* Opcode decoder for the TI MSP430
2   Copyright 2012-2013 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
22typedef 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
57typedef 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
66typedef 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
76typedef 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
86typedef enum
87{
88  MSP430_Byte = 0,
89  MSP430_Word,
90  MSP430_Addr
91} MSP430_Size;
92
93/* These numerically match the bit encoding.  */
94typedef 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
111typedef 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
130int msp430_decode_opcode (unsigned long, MSP430_Opcode_Decoded *, int (*)(void *), void *);
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