include/opcode/rx.h

   1 /* Opcode decoder for the Renesas RX
   2    Copyright 2008, 2009
   3    Free Software Foundation, Inc.
   4    Written by DJ Delorie <dj@redhat.com>
   5
   6    This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  21    02110-1301, USA.  */
  22
  23 /* The RX decoder in libopcodes is used by the simulator, gdb's
  24    analyzer, and the disassembler.  Given an opcode data source,
  25    it decodes the next opcode into the following structures.  */
  26
  27 typedef enum
  28 {
  29   RX_AnySize = 0,
  30   RX_Byte, /* undefined extension */
  31   RX_UByte,
  32   RX_SByte,
  33   RX_Word, /* undefined extension */
  34   RX_UWord,
  35   RX_SWord,
  36   RX_3Byte,
  37   RX_Long,
  38 } RX_Size;
  39
  40 typedef enum
  41 {
  42   RX_Operand_None,
  43   RX_Operand_Immediate, /* #addend */
  44   RX_Operand_Register,  /* Rn */
  45   RX_Operand_Indirect,  /* [Rn + addend] */
  46   RX_Operand_Postinc,   /* [Rn+] */
  47   RX_Operand_Predec,    /* [-Rn] */
  48   RX_Operand_Condition, /* eq, gtu, etc */
  49   RX_Operand_Flag,      /* [UIOSZC] */
  50 } RX_Operand_Type;
  51
  52 typedef enum
  53 {
  54   RXO_unknown,
  55   RXO_mov,      /* d = s (signed) */
  56   RXO_movbi,    /* d = [s,s2] (signed) */
  57   RXO_movbir,   /* [s,s2] = d (signed) */
  58   RXO_pushm,    /* s..s2 */
  59   RXO_popm,     /* s..s2 */
  60   RXO_pusha,    /* &s */
  61   RXO_xchg,     /* s <-> d */
  62   RXO_stcc,     /* d = s if cond(s2) */
  63   RXO_rtsd,     /* rtsd, 1=imm, 2-0 = reg if reg type */
  64
  65   /* These are all either d OP= s or, if s2 is set, d = s OP s2.  Note
  66      that d may be "None".  */
  67   RXO_and,
  68   RXO_or,
  69   RXO_xor,
  70   RXO_add,
  71   RXO_sub,
  72   RXO_mul,
  73   RXO_div,
  74   RXO_divu,
  75   RXO_shll,
  76   RXO_shar,
  77   RXO_shlr,
  78
  79   RXO_adc,      /* d = d + s + carry */
  80   RXO_sbb,      /* d = d - s - ~carry */
  81   RXO_abs,      /* d = |s| */
  82   RXO_max,      /* d = max(d,s) */
  83   RXO_min,      /* d = min(d,s) */
  84   RXO_emul,     /* d:64 = d:32 * s */
  85   RXO_emulu,    /* d:64 = d:32 * s (unsigned) */
  86   RXO_ediv,     /* d:64 / s; d = quot, d+1 = rem */
  87   RXO_edivu,    /* d:64 / s; d = quot, d+1 = rem */
  88
  89   RXO_rolc,     /* d <<= 1 through carry */
  90   RXO_rorc,     /* d >>= 1 through carry*/
  91   RXO_rotl,     /* d <<= #s without carry */
  92   RXO_rotr,     /* d >>= #s without carry*/
  93   RXO_revw,     /* d = revw(s) */
  94   RXO_revl,     /* d = revl(s) */
  95   RXO_branch,   /* pc = d if cond(s) */
  96   RXO_branchrel,/* pc += d if cond(s) */
  97   RXO_jsr,      /* pc = d */
  98   RXO_jsrrel,   /* pc += d */
  99   RXO_rts,
 100   RXO_nop,
 101
 102   RXO_scmpu,
 103   RXO_smovu,
 104   RXO_smovb,
 105   RXO_suntil,
 106   RXO_swhile,
 107   RXO_smovf,
 108   RXO_sstr,
 109
 110   RXO_rmpa,
 111   RXO_mulhi,
 112   RXO_mullo,
 113   RXO_machi,
 114   RXO_maclo,
 115   RXO_mvtachi,
 116   RXO_mvtaclo,
 117   RXO_mvfachi,
 118   RXO_mvfacmi,
 119   RXO_mvfaclo,
 120   RXO_racw,
 121
 122   RXO_sat,      /* sat(d) */
 123   RXO_satr,
 124
 125   RXO_fadd,     /* d op= s */
 126   RXO_fcmp,
 127   RXO_fsub,
 128   RXO_ftoi,
 129   RXO_fmul,
 130   RXO_fdiv,
 131   RXO_round,
 132   RXO_itof,
 133
 134   RXO_bset,     /* d |= (1<<s) */
 135   RXO_bclr,     /* d &= ~(1<<s) */
 136   RXO_btst,     /* s & (1<<s2) */
 137   RXO_bnot,     /* d ^= (1<<s) */
 138   RXO_bmcc,     /* d<s> = cond(s2) */
 139
 140   RXO_clrpsw,   /* flag index in d */
 141   RXO_setpsw,   /* flag index in d */
 142
 143   RXO_mvtcp,    /* cop# in s2, cop[d] = s */
 144   RXO_mvfcp,    /* cop# in s2, d = cop[s] */
 145   RXO_opecp,    /* cop# in s2, do cop[s] */
 146
 147   RXO_rtfi,
 148   RXO_rte,
 149   RXO_rtd,      /* undocumented */
 150   RXO_brk,
 151   RXO_dbt,      /* undocumented */
 152   RXO_int,      /* vector id in s */
 153   RXO_stop,
 154   RXO_wait,
 155
 156   RXO_sccnd,    /* d = cond(s) ? 1 : 0 */
 157 } RX_Opcode_ID;
 158
 159 /* Condition bitpatterns, as registers.  */
 160 #define RXC_eq          0
 161 #define RXC_z           0
 162 #define RXC_ne          1
 163 #define RXC_nz          1
 164 #define RXC_c           2
 165 #define RXC_nc          3
 166 #define RXC_gtu         4
 167 #define RXC_leu         5
 168 #define RXC_pz          6
 169 #define RXC_n           7
 170 #define RXC_ge          8
 171 #define RXC_lt          9
 172 #define RXC_gt          10
 173 #define RXC_le          11
 174 #define RXC_o           12
 175 #define RXC_no          13
 176 #define RXC_always      14
 177 #define RXC_never       15
 178
 179 typedef struct
 180 {
 181   RX_Operand_Type  type;
 182   int              reg;
 183   int              addend;
 184   RX_Size          size;
 185 } RX_Opcode_Operand;
 186
 187 typedef struct
 188 {
 189   RX_Opcode_ID      id;
 190   int               n_bytes;
 191   int               prefix;
 192   char *            syntax;
 193   RX_Size           size;
 194   /* By convention, these are destination, source1, source2.  */
 195   RX_Opcode_Operand op[3];
 196
 197   /* The logic here is:
 198      newflags = (oldflags & ~(int)flags_0) | flags_1 | (op_flags & flags_s)
 199      Only the O, S, Z, and C flags are affected.  */
 200   char flags_0; /* This also clears out flags-to-be-set.  */
 201   char flags_1;
 202   char flags_s;
 203 } RX_Opcode_Decoded;
 204
 205 /* Within the syntax, %c-style format specifiers are as follows:
 206
 207    %% = '%' character
 208    %0 = operand[0] (destination)
 209    %1 = operand[1] (source)
 210    %2 = operand[2] (2nd source)
 211    %s = operation size (b/w/l)
 212    %SN = operand size [N] (N=0,1,2)
 213    %aN = op[N] as an address (N=0,1,2)
 214
 215    Register numbers 0..15 are general registers.  16..31 are control
 216    registers.  32..47 are condition codes.  */
 217
 218 int rx_decode_opcode (unsigned long, RX_Opcode_Decoded *, int (*)(void *), void *);