include/opcode/d10v.h

   1 /* d10v.h -- Header file for D10V opcode table
   2    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003
   3    Free Software Foundation, Inc.
   4    Written by Martin Hunt (hunt@cygnus.com), Cygnus Support
   5
   6 This file is part of GDB, GAS, and the GNU binutils.
   7
   8 GDB, GAS, and the GNU binutils are free software; you can redistribute
   9 them and/or modify them under the terms of the GNU General Public
  10 License as published by the Free Software Foundation; either version
  11 1, or (at your option) any later version.
  12
  13 GDB, GAS, and the GNU binutils are distributed in the hope that they
  14 will be useful, but WITHOUT ANY WARRANTY; without even the implied
  15 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  16 the 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 file; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef D10V_H
  23 #define D10V_H
  24
  25 /* Format Specifier */
  26 #define FM00    0
  27 #define FM01    0x40000000
  28 #define FM10    0x80000000
  29 #define FM11    0xC0000000
  30
  31 #define NOP 0x5e00
  32 #define OPCODE_DIVS     0x14002800
  33
  34 /* The opcode table is an array of struct d10v_opcode.  */
  35
  36 struct d10v_opcode
  37 {
  38   /* The opcode name.  */
  39   const char *name;
  40
  41   /* the opcode format */
  42   int format;
  43
  44   /* These numbers were picked so we can do if( i & SHORT_OPCODE) */
  45 #define SHORT_OPCODE 1
  46 #define LONG_OPCODE  8
  47 #define SHORT_2      1          /* short with 2 operands */
  48 #define SHORT_B      3          /* short with 8-bit branch */
  49 #define LONG_B       8          /* long with 16-bit branch */
  50 #define LONG_L       10         /* long with 3 operands */
  51 #define LONG_R       12         /* reserved */
  52
  53   /* just a placeholder for variable-length instructions */
  54   /* for example, "bra" will be a fake for "bra.s" and bra.l" */
  55   /* which will immediately follow in the opcode table.  */
  56 #define OPCODE_FAKE  32
  57
  58   /* the number of cycles */
  59   int cycles;
  60
  61   /* the execution unit(s) used */
  62   int unit;
  63 #define EITHER  0
  64 #define IU      1
  65 #define MU      2
  66 #define BOTH    3
  67
  68   /* execution type; parallel or sequential */
  69   /* this field is used to decide if two instructions */
  70   /* can be executed in parallel */
  71   int exec_type;
  72 #define PARONLY 1       /* parallel only */
  73 #define SEQ     2       /* must be sequential */
  74 #define PAR     4       /* may be parallel */
  75 #define BRANCH_LINK 8   /* subroutine call.  must be aligned */
  76 #define RMEM     16     /* reads memory */
  77 #define WMEM     32     /* writes memory */
  78 #define RF0      64     /* reads f0 */
  79 #define WF0     128     /* modifies f0 */
  80 #define WCAR    256     /* write Carry */
  81 #define BRANCH  512     /* branch, no link */
  82 #define ALONE  1024     /* short but pack with a NOP if on asm line alone */
  83
  84   /* the opcode */
  85   long opcode;
  86
  87   /* mask.  if( (i & mask) == opcode ) then match */
  88   long mask;
  89
  90   /* An array of operand codes.  Each code is an index into the
  91      operand table.  They appear in the order which the operands must
  92      appear in assembly code, and are terminated by a zero.  */
  93   unsigned char operands[6];
  94 };
  95
  96 /* The table itself is sorted by major opcode number, and is otherwise
  97    in the order in which the disassembler should consider
  98    instructions.  */
  99 extern const struct d10v_opcode d10v_opcodes[];
 100 extern const int d10v_num_opcodes;
 101
 102 /* The operands table is an array of struct d10v_operand.  */
 103 struct d10v_operand
 104 {
 105   /* The number of bits in the operand.  */
 106   int bits;
 107
 108   /* How far the operand is left shifted in the instruction.  */
 109   int shift;
 110
 111   /* One bit syntax flags.  */
 112   int flags;
 113 };
 114
 115 /* Elements in the table are retrieved by indexing with values from
 116    the operands field of the d10v_opcodes table.  */
 117
 118 extern const struct d10v_operand d10v_operands[];
 119
 120 /* Values defined for the flags field of a struct d10v_operand.  */
 121
 122 /* the operand must be an even number */
 123 #define OPERAND_EVEN    (1)
 124
 125 /* the operand must be an odd number */
 126 #define OPERAND_ODD     (2)
 127
 128 /* this is the destination register; it will be modified */
 129 /* this is used by the optimizer */
 130 #define OPERAND_DEST    (4)
 131
 132 /* number or symbol */
 133 #define OPERAND_NUM     (8)
 134
 135 /* address or label */
 136 #define OPERAND_ADDR    (0x10)
 137
 138 /* register */
 139 #define OPERAND_REG     (0x20)
 140
 141 /* postincrement +  */
 142 #define OPERAND_PLUS    (0x40)
 143
 144 /* postdecrement -  */
 145 #define OPERAND_MINUS   (0x80)
 146
 147 /* @  */
 148 #define OPERAND_ATSIGN  (0x100)
 149
 150 /* @(  */
 151 #define OPERAND_ATPAR   (0x200)
 152
 153 /* accumulator 0 */
 154 #define OPERAND_ACC0    (0x400)
 155
 156 /* accumulator 1 */
 157 #define OPERAND_ACC1    (0x800)
 158
 159 /* f0 / f1 flag register */
 160 #define OPERAND_FFLAG   (0x1000)
 161
 162 /* c flag register */
 163 #define OPERAND_CFLAG   (0x2000)
 164
 165 /* control register  */
 166 #define OPERAND_CONTROL (0x4000)
 167
 168 /* predecrement mode '@-sp'  */
 169 #define OPERAND_ATMINUS (0x8000)
 170
 171 /* signed number */
 172 #define OPERAND_SIGNED  (0x10000)
 173
 174 /* special accumulator shifts need a 4-bit number */
 175 /* 1 <= x <= 16 */
 176 #define OPERAND_SHIFT   (0x20000)
 177
 178 /* general purpose register */
 179 #define OPERAND_GPR     (0x40000)
 180
 181 /* special imm3 values with range restricted to -2 <= imm3 <= 3 */
 182 /* needed for rac/rachi */
 183 #define RESTRICTED_NUM3 (0x80000)
 184
 185 /* Pre-decrement is only supported for SP.  */
 186 #define OPERAND_SP      (0x100000)
 187
 188 /* Post-decrement is not supported for SP.  Like OPERAND_EVEN, and
 189    unlike OPERAND_SP, this flag doesn't prevent the instruction from
 190    matching, it only fails validation later on.  */
 191 #define OPERAND_NOSP    (0x200000)
 192
 193 /* Structure to hold information about predefined registers.  */
 194 struct pd_reg
 195 {
 196   char *name;           /* name to recognize */
 197   char *pname;          /* name to print for this register */
 198   int value;
 199 };
 200
 201 extern const struct pd_reg d10v_predefined_registers[];
 202 int d10v_reg_name_cnt (void);
 203
 204 /* an expressionS only has one register type, so we fake it */
 205 /* by setting high bits to indicate type */
 206 #define REGISTER_MASK   0xFF
 207
 208 #endif /* D10V_H */