include/opcode/rx.h

   1 /* Opcode decoder for the Renesas RX
   2    Copyright (C) 2008-2015 Free Software Foundation, Inc.
   3    Written by DJ Delorie <dj@redhat.com>
   4
   5    This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler.
   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 /* 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.  */
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 typedef enum
  31 {
  32   RX_AnySize = 0,
  33   RX_Byte, /* undefined extension */
  34   RX_UByte,
  35   RX_SByte,
  36   RX_Word, /* undefined extension */
  37   RX_UWord,
  38   RX_SWord,
  39   RX_3Byte,
  40   RX_Long,
  41   RX_Bad_Size,
  42   RX_MAX_SIZE
  43 } RX_Size;
  44
  45 typedef enum
  46 {
  47   RX_Operand_None,
  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] */
  57 } RX_Operand_Type;
  58
  59 typedef enum
  60 {
  61   RXO_unknown,
  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 */
  66   RXO_popm,     /* 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 */
  70
  71   /* These are all either d OP= s or, if s2 is set, d = s OP s2.  Note
  72      that d may be "None".  */
  73   RXO_and,
  74   RXO_or,
  75   RXO_xor,
  76   RXO_add,
  77   RXO_sub,
  78   RXO_mul,
  79   RXO_div,
  80   RXO_divu,
  81   RXO_shll,
  82   RXO_shar,
  83   RXO_shlr,
  84
  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) */
  92
  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 */
 103   RXO_rts,
 104   RXO_nop,
 105   RXO_nop2,
 106   RXO_nop3,
 107   RXO_nop4,
 108   RXO_nop5,
 109   RXO_nop6,
 110   RXO_nop7,
 111
 112   RXO_scmpu,
 113   RXO_smovu,
 114   RXO_smovb,
 115   RXO_suntil,
 116   RXO_swhile,
 117   RXO_smovf,
 118   RXO_sstr,
 119
 120   RXO_rmpa,
 121   RXO_mulhi,
 122   RXO_mullo,
 123   RXO_machi,
 124   RXO_maclo,
 125   RXO_mvtachi,
 126   RXO_mvtaclo,
 127   RXO_mvfachi,
 128   RXO_mvfacmi,
 129   RXO_mvfaclo,
 130   RXO_racw,
 131
 132   RXO_sat,      /* sat(d) */
 133   RXO_satr,
 134
 135   RXO_fadd,     /* d op= s */
 136   RXO_fcmp,
 137   RXO_fsub,
 138   RXO_ftoi,
 139   RXO_fmul,
 140   RXO_fdiv,
 141   RXO_round,
 142   RXO_itof,
 143
 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) */
 149
 150   RXO_clrpsw,   /* flag index in d */
 151   RXO_setpsw,   /* flag index in d */
 152   RXO_mvtipl,   /* new IPL in s */
 153
 154   RXO_rtfi,
 155   RXO_rte,
 156   RXO_rtd,      /* undocumented */
 157   RXO_brk,
 158   RXO_dbt,      /* undocumented */
 159   RXO_int,      /* vector id in s */
 160   RXO_stop,
 161   RXO_wait,
 162
 163   RXO_sccnd,    /* d = cond(s) ? 1 : 0 */
 164 } RX_Opcode_ID;
 165
 166 /* Condition bitpatterns, as registers.  */
 167 #define RXC_eq          0
 168 #define RXC_z           0
 169 #define RXC_ne          1
 170 #define RXC_nz          1
 171 #define RXC_c           2
 172 #define RXC_nc          3
 173 #define RXC_gtu         4
 174 #define RXC_leu         5
 175 #define RXC_pz          6
 176 #define RXC_n           7
 177 #define RXC_ge          8
 178 #define RXC_lt          9
 179 #define RXC_gt          10
 180 #define RXC_le          11
 181 #define RXC_o           12
 182 #define RXC_no          13
 183 #define RXC_always      14
 184 #define RXC_never       15
 185
 186 typedef struct
 187 {
 188   RX_Operand_Type  type;
 189   int              reg;
 190   int              addend;
 191   RX_Size          size;
 192 } RX_Opcode_Operand;
 193
 194 typedef struct
 195 {
 196   RX_Opcode_ID      id;
 197   int               n_bytes;
 198   int               prefix;
 199   char *            syntax;
 200   RX_Size           size;
 201   /* By convention, these are destination, source1, source2.  */
 202   RX_Opcode_Operand op[3];
 203
 204   /* The logic here is:
 205      newflags = (oldflags & ~(int)flags_0) | flags_1 | (op_flags & flags_s)
 206      Only the O, S, Z, and C flags are affected.  */
 207   char flags_0; /* This also clears out flags-to-be-set.  */
 208   char flags_1;
 209   char flags_s;
 210 } RX_Opcode_Decoded;
 211
 212 /* Within the syntax, %c-style format specifiers are as follows:
 213
 214    %% = '%' character
 215    %0 = operand[0] (destination)
 216    %1 = operand[1] (source)
 217    %2 = operand[2] (2nd source)
 218    %s = operation size (b/w/l)
 219    %SN = operand size [N] (N=0,1,2)
 220    %aN = op[N] as an address (N=0,1,2)
 221
 222    Register numbers 0..15 are general registers.  16..31 are control
 223    registers.  32..47 are condition codes.  */
 224
 225 int rx_decode_opcode (unsigned long, RX_Opcode_Decoded *, int (*)(void *), void *);
 226
 227 #ifdef __cplusplus
 228 }
 229 #endif