1 /* Opcode decoder for the Renesas RX
2 Copyright (C) 2008-2016 Free Software Foundation, Inc.
3 Written by DJ Delorie <dj@redhat.com>
5 This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler.
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.
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.
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
22 /* The RX decoder in libopcodes is used by the simulator, gdb's
23 analyzer, and the disassembler. Given an opcode data source,
24 it decodes the next opcode into the following structures. */
33 RX_Byte
, /* undefined extension */
36 RX_Word
, /* undefined extension */
48 RX_Operand_Immediate
, /* #addend */
49 RX_Operand_Register
, /* Rn */
50 RX_Operand_Indirect
, /* [Rn + addend] */
51 RX_Operand_Zero_Indirect
,/* [Rn] */
52 RX_Operand_Postinc
, /* [Rn+] */
53 RX_Operand_Predec
, /* [-Rn] */
54 RX_Operand_Condition
, /* eq, gtu, etc */
55 RX_Operand_Flag
, /* [UIOSZC] */
56 RX_Operand_TwoReg
, /* [Rn + scale*R2] */
62 RXO_mov
, /* d = s (signed) */
63 RXO_movbi
, /* d = [s,s2] (signed) */
64 RXO_movbir
, /* [s,s2] = d (signed) */
65 RXO_pushm
, /* s..s2 */
67 RXO_xchg
, /* s <-> d */
68 RXO_stcc
, /* d = s if cond(s2) */
69 RXO_rtsd
, /* rtsd, 1=imm, 2-0 = reg if reg type */
71 /* These are all either d OP= s or, if s2 is set, d = s OP s2. Note
72 that d may be "None". */
85 RXO_adc
, /* d = d + s + carry */
86 RXO_sbb
, /* d = d - s - ~carry */
87 RXO_abs
, /* d = |s| */
88 RXO_max
, /* d = max(d,s) */
89 RXO_min
, /* d = min(d,s) */
90 RXO_emul
, /* d:64 = d:32 * s */
91 RXO_emulu
, /* d:64 = d:32 * s (unsigned) */
93 RXO_rolc
, /* d <<= 1 through carry */
94 RXO_rorc
, /* d >>= 1 through carry*/
95 RXO_rotl
, /* d <<= #s without carry */
96 RXO_rotr
, /* d >>= #s without carry*/
97 RXO_revw
, /* d = revw(s) */
98 RXO_revl
, /* d = revl(s) */
99 RXO_branch
, /* pc = d if cond(s) */
100 RXO_branchrel
,/* pc += d if cond(s) */
101 RXO_jsr
, /* pc = d */
102 RXO_jsrrel
, /* pc += d */
132 RXO_sat
, /* sat(d) */
135 RXO_fadd
, /* d op= s */
144 RXO_bset
, /* d |= (1<<s) */
145 RXO_bclr
, /* d &= ~(1<<s) */
146 RXO_btst
, /* s & (1<<s2) */
147 RXO_bnot
, /* d ^= (1<<s) */
148 RXO_bmcc
, /* d<s> = cond(s2) */
150 RXO_clrpsw
, /* flag index in d */
151 RXO_setpsw
, /* flag index in d */
152 RXO_mvtipl
, /* new IPL in s */
156 RXO_rtd
, /* undocumented */
158 RXO_dbt
, /* undocumented */
159 RXO_int
, /* vector id in s */
163 RXO_sccnd
, /* d = cond(s) ? 1 : 0 */
185 /* Condition bitpatterns, as registers. */
202 #define RXC_always 14
207 RX_Operand_Type type
;
220 /* By convention, these are destination, source1, source2. */
221 RX_Opcode_Operand op
[3];
223 /* The logic here is:
224 newflags = (oldflags & ~(int)flags_0) | flags_1 | (op_flags & flags_s)
225 Only the O, S, Z, and C flags are affected. */
226 char flags_0
; /* This also clears out flags-to-be-set. */
231 /* Within the syntax, %c-style format specifiers are as follows:
234 %0 = operand[0] (destination)
235 %1 = operand[1] (source)
236 %2 = operand[2] (2nd source)
237 %s = operation size (b/w/l)
238 %SN = operand size [N] (N=0,1,2)
239 %aN = op[N] as an address (N=0,1,2)
241 Register numbers 0..15 are general registers. 16..31 are control
242 registers. 32..47 are condition codes. */
244 int rx_decode_opcode (unsigned long, RX_Opcode_Decoded
*, int (*)(void *), void *);
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