include/opcode/d10v.h

   1 /* d10v.h -- Header file for D10V opcode table
   2    Copyright (C) 1996-2024 Free Software Foundation, Inc.
   3    Written by Martin Hunt (hunt@cygnus.com), Cygnus Support
   4
   5    This file is part of GDB, GAS, and the GNU binutils.
   6
   7    GDB, GAS, and the GNU binutils are free software; you can redistribute
   8    them and/or modify them under the terms of the GNU General Public
   9    License as published by the Free Software Foundation; either version 3,
  10    or (at your option) any later version.
  11
  12    GDB, GAS, and the GNU binutils are distributed in the hope that they
  13    will be useful, but WITHOUT ANY WARRANTY; without even the implied
  14    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15    the 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 file; see the file COPYING3.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #ifndef D10V_H
  23 #define D10V_H
  24
  25 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 /* Format Specifier */
  30 #define FM00    0
  31 #define FM01    0x40000000
  32 #define FM10    0x80000000
  33 #define FM11    0xC0000000
  34
  35 #define NOP 0x5e00
  36 #define OPCODE_DIVS     0x14002800
  37
  38 /* The opcode table is an array of struct d10v_opcode.  */
  39
  40 struct d10v_opcode
  41 {
  42   /* The opcode name.  */
  43   const char *name;
  44
  45   /* the opcode format */
  46   int format;
  47
  48   /* These numbers were picked so we can do if( i & SHORT_OPCODE) */
  49 #define SHORT_OPCODE 1
  50 #define LONG_OPCODE  8
  51 #define SHORT_2      1          /* short with 2 operands */
  52 #define SHORT_B      3          /* short with 8-bit branch */
  53 #define LONG_B       8          /* long with 16-bit branch */
  54 #define LONG_L       10         /* long with 3 operands */
  55 #define LONG_R       12         /* reserved */
  56
  57   /* just a placeholder for variable-length instructions */
  58   /* for example, "bra" will be a fake for "bra.s" and bra.l" */
  59   /* which will immediately follow in the opcode table.  */
  60 #define OPCODE_FAKE  32
  61
  62   /* the number of cycles */
  63   int cycles;
  64
  65   /* the execution unit(s) used */
  66   int unit;
  67 #define EITHER  0
  68 #define IU      1
  69 #define MU      2
  70 #define BOTH    3
  71
  72   /* execution type; parallel or sequential */
  73   /* this field is used to decide if two instructions */
  74   /* can be executed in parallel */
  75   int exec_type;
  76 #define PARONLY 1       /* parallel only */
  77 #define SEQ     2       /* must be sequential */
  78 #define PAR     4       /* may be parallel */
  79 #define BRANCH_LINK 8   /* subroutine call.  must be aligned */
  80 #define RMEM     16     /* reads memory */
  81 #define WMEM     32     /* writes memory */
  82 #define RF0      64     /* reads f0 */
  83 #define WF0     128     /* modifies f0 */
  84 #define WCAR    256     /* write Carry */
  85 #define BRANCH  512     /* branch, no link */
  86 #define ALONE  1024     /* short but pack with a NOP if on asm line alone */
  87
  88   /* the opcode */
  89   long opcode;
  90
  91   /* mask.  if( (i & mask) == opcode ) then match */
  92   long mask;
  93
  94   /* An array of operand codes.  Each code is an index into the
  95      operand table.  They appear in the order which the operands must
  96      appear in assembly code, and are terminated by a zero.  */
  97   unsigned char operands[6];
  98 };
  99
 100 /* The table itself is sorted by major opcode number, and is otherwise
 101    in the order in which the disassembler should consider
 102    instructions.  */
 103 extern const struct d10v_opcode d10v_opcodes[];
 104 extern const int d10v_num_opcodes;
 105
 106 /* The operands table is an array of struct d10v_operand.  */
 107 struct d10v_operand
 108 {
 109   /* The number of bits in the operand.  */
 110   int bits;
 111
 112   /* How far the operand is left shifted in the instruction.  */
 113   int shift;
 114
 115   /* One bit syntax flags.  */
 116   int flags;
 117 };
 118
 119 /* Elements in the table are retrieved by indexing with values from
 120    the operands field of the d10v_opcodes table.  */
 121
 122 extern const struct d10v_operand d10v_operands[];
 123
 124 /* Values defined for the flags field of a struct d10v_operand.  */
 125
 126 /* the operand must be an even number */
 127 #define OPERAND_EVEN    (1)
 128
 129 /* the operand must be an odd number */
 130 #define OPERAND_ODD     (2)
 131
 132 /* this is the destination register; it will be modified */
 133 /* this is used by the optimizer */
 134 #define OPERAND_DEST    (4)
 135
 136 /* number or symbol */
 137 #define OPERAND_NUM     (8)
 138
 139 /* address or label */
 140 #define OPERAND_ADDR    (0x10)
 141
 142 /* register */
 143 #define OPERAND_REG     (0x20)
 144
 145 /* postincrement +  */
 146 #define OPERAND_PLUS    (0x40)
 147
 148 /* postdecrement -  */
 149 #define OPERAND_MINUS   (0x80)
 150
 151 /* @  */
 152 #define OPERAND_ATSIGN  (0x100)
 153
 154 /* @(  */
 155 #define OPERAND_ATPAR   (0x200)
 156
 157 /* accumulator 0 */
 158 #define OPERAND_ACC0    (0x400)
 159
 160 /* accumulator 1 */
 161 #define OPERAND_ACC1    (0x800)
 162
 163 /* f0 / f1 flag register */
 164 #define OPERAND_FFLAG   (0x1000)
 165
 166 /* c flag register */
 167 #define OPERAND_CFLAG   (0x2000)
 168
 169 /* control register  */
 170 #define OPERAND_CONTROL (0x4000)
 171
 172 /* predecrement mode '@-sp'  */
 173 #define OPERAND_ATMINUS (0x8000)
 174
 175 /* signed number */
 176 #define OPERAND_SIGNED  (0x10000)
 177
 178 /* special accumulator shifts need a 4-bit number */
 179 /* 1 <= x <= 16 */
 180 #define OPERAND_SHIFT   (0x20000)
 181
 182 /* general purpose register */
 183 #define OPERAND_GPR     (0x40000)
 184
 185 /* special imm3 values with range restricted to -2 <= imm3 <= 3 */
 186 /* needed for rac/rachi */
 187 #define RESTRICTED_NUM3 (0x80000)
 188
 189 /* Pre-decrement is only supported for SP.  */
 190 #define OPERAND_SP      (0x100000)
 191
 192 /* Post-decrement is not supported for SP.  Like OPERAND_EVEN, and
 193    unlike OPERAND_SP, this flag doesn't prevent the instruction from
 194    matching, it only fails validation later on.  */
 195 #define OPERAND_NOSP    (0x200000)
 196
 197 /* Structure to hold information about predefined registers.  */
 198 struct pd_reg
 199 {
 200   char *name;           /* name to recognize */
 201   char *pname;          /* name to print for this register */
 202   int value;
 203 };
 204
 205 extern const struct pd_reg d10v_predefined_registers[];
 206 int d10v_reg_name_cnt (void);
 207
 208 /* an expressionS only has one register type, so we fake it */
 209 /* by setting high bits to indicate type */
 210 #define REGISTER_MASK   0xFF
 211
 212 #ifdef __cplusplus
 213 }
 214 #endif
 215
 216 #endif /* D10V_H */