include/opcode/ppc.h

   1 /* ppc.h -- Header file for PowerPC opcode table
   2    Copyright 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004
   3    Free Software Foundation, Inc.
   4    Written by Ian Lance Taylor, 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 PPC_H
  23 #define PPC_H
  24
  25 /* The opcode table is an array of struct powerpc_opcode.  */
  26
  27 struct powerpc_opcode
  28 {
  29   /* The opcode name.  */
  30   const char *name;
  31
  32   /* The opcode itself.  Those bits which will be filled in with
  33      operands are zeroes.  */
  34   unsigned long opcode;
  35
  36   /* The opcode mask.  This is used by the disassembler.  This is a
  37      mask containing ones indicating those bits which must match the
  38      opcode field, and zeroes indicating those bits which need not
  39      match (and are presumably filled in by operands).  */
  40   unsigned long mask;
  41
  42   /* One bit flags for the opcode.  These are used to indicate which
  43      specific processors support the instructions.  The defined values
  44      are listed below.  */
  45   unsigned long flags;
  46
  47   /* An array of operand codes.  Each code is an index into the
  48      operand table.  They appear in the order which the operands must
  49      appear in assembly code, and are terminated by a zero.  */
  50   unsigned char operands[8];
  51 };
  52
  53 /* The table itself is sorted by major opcode number, and is otherwise
  54    in the order in which the disassembler should consider
  55    instructions.  */
  56 extern const struct powerpc_opcode powerpc_opcodes[];
  57 extern const int powerpc_num_opcodes;
  58
  59 /* Values defined for the flags field of a struct powerpc_opcode.  */
  60
  61 /* Opcode is defined for the PowerPC architecture.  */
  62 #define PPC_OPCODE_PPC                   1
  63
  64 /* Opcode is defined for the POWER (RS/6000) architecture.  */
  65 #define PPC_OPCODE_POWER                 2
  66
  67 /* Opcode is defined for the POWER2 (Rios 2) architecture.  */
  68 #define PPC_OPCODE_POWER2                4
  69
  70 /* Opcode is only defined on 32 bit architectures.  */
  71 #define PPC_OPCODE_32                    8
  72
  73 /* Opcode is only defined on 64 bit architectures.  */
  74 #define PPC_OPCODE_64                 0x10
  75
  76 /* Opcode is supported by the Motorola PowerPC 601 processor.  The 601
  77    is assumed to support all PowerPC (PPC_OPCODE_PPC) instructions,
  78    but it also supports many additional POWER instructions.  */
  79 #define PPC_OPCODE_601                0x20
  80
  81 /* Opcode is supported in both the Power and PowerPC architectures
  82    (ie, compiler's -mcpu=common or assembler's -mcom).  */
  83 #define PPC_OPCODE_COMMON             0x40
  84
  85 /* Opcode is supported for any Power or PowerPC platform (this is
  86    for the assembler's -many option, and it eliminates duplicates).  */
  87 #define PPC_OPCODE_ANY                0x80
  88
  89 /* Opcode is supported as part of the 64-bit bridge.  */
  90 #define PPC_OPCODE_64_BRIDGE         0x100
  91
  92 /* Opcode is supported by Altivec Vector Unit */
  93 #define PPC_OPCODE_ALTIVEC           0x200
  94
  95 /* Opcode is supported by PowerPC 403 processor.  */
  96 #define PPC_OPCODE_403               0x400
  97
  98 /* Opcode is supported by PowerPC BookE processor.  */
  99 #define PPC_OPCODE_BOOKE             0x800
 100
 101 /* Opcode is only supported by 64-bit PowerPC BookE processor.  */
 102 #define PPC_OPCODE_BOOKE64          0x1000
 103
 104 /* Opcode is supported by PowerPC 440 processor.  */
 105 #define PPC_OPCODE_440              0x2000
 106
 107 /* Opcode is only supported by Power4 architecture.  */
 108 #define PPC_OPCODE_POWER4           0x4000
 109
 110 /* Opcode isn't supported by Power4 architecture.  */
 111 #define PPC_OPCODE_NOPOWER4         0x8000
 112
 113 /* Opcode is only supported by POWERPC Classic architecture.  */
 114 #define PPC_OPCODE_CLASSIC         0x10000
 115
 116 /* Opcode is only supported by e500x2 Core.  */
 117 #define PPC_OPCODE_SPE             0x20000
 118
 119 /* Opcode is supported by e500x2 Integer select APU.  */
 120 #define PPC_OPCODE_ISEL            0x40000
 121
 122 /* Opcode is an e500 SPE floating point instruction.  */
 123 #define PPC_OPCODE_EFS             0x80000
 124
 125 /* Opcode is supported by branch locking APU.  */
 126 #define PPC_OPCODE_BRLOCK         0x100000
 127
 128 /* Opcode is supported by performance monitor APU.  */
 129 #define PPC_OPCODE_PMR            0x200000
 130
 131 /* Opcode is supported by cache locking APU.  */
 132 #define PPC_OPCODE_CACHELCK       0x400000
 133
 134 /* Opcode is supported by machine check APU.  */
 135 #define PPC_OPCODE_RFMCI          0x800000
 136
 137 /* A macro to extract the major opcode from an instruction.  */
 138 #define PPC_OP(i) (((i) >> 26) & 0x3f)
 139 \f
 140 /* The operands table is an array of struct powerpc_operand.  */
 141
 142 struct powerpc_operand
 143 {
 144   /* The number of bits in the operand.  */
 145   int bits;
 146
 147   /* How far the operand is left shifted in the instruction.  */
 148   int shift;
 149
 150   /* Insertion function.  This is used by the assembler.  To insert an
 151      operand value into an instruction, check this field.
 152
 153      If it is NULL, execute
 154          i |= (op & ((1 << o->bits) - 1)) << o->shift;
 155      (i is the instruction which we are filling in, o is a pointer to
 156      this structure, and op is the opcode value; this assumes twos
 157      complement arithmetic).
 158
 159      If this field is not NULL, then simply call it with the
 160      instruction and the operand value.  It will return the new value
 161      of the instruction.  If the ERRMSG argument is not NULL, then if
 162      the operand value is illegal, *ERRMSG will be set to a warning
 163      string (the operand will be inserted in any case).  If the
 164      operand value is legal, *ERRMSG will be unchanged (most operands
 165      can accept any value).  */
 166   unsigned long (*insert)
 167     (unsigned long instruction, long op, int dialect, const char **errmsg);
 168
 169   /* Extraction function.  This is used by the disassembler.  To
 170      extract this operand type from an instruction, check this field.
 171
 172      If it is NULL, compute
 173          op = ((i) >> o->shift) & ((1 << o->bits) - 1);
 174          if ((o->flags & PPC_OPERAND_SIGNED) != 0
 175              && (op & (1 << (o->bits - 1))) != 0)
 176            op -= 1 << o->bits;
 177      (i is the instruction, o is a pointer to this structure, and op
 178      is the result; this assumes twos complement arithmetic).
 179
 180      If this field is not NULL, then simply call it with the
 181      instruction value.  It will return the value of the operand.  If
 182      the INVALID argument is not NULL, *INVALID will be set to
 183      non-zero if this operand type can not actually be extracted from
 184      this operand (i.e., the instruction does not match).  If the
 185      operand is valid, *INVALID will not be changed.  */
 186   long (*extract) (unsigned long instruction, int dialect, int *invalid);
 187
 188   /* One bit syntax flags.  */
 189   unsigned long flags;
 190 };
 191
 192 /* Elements in the table are retrieved by indexing with values from
 193    the operands field of the powerpc_opcodes table.  */
 194
 195 extern const struct powerpc_operand powerpc_operands[];
 196
 197 /* Values defined for the flags field of a struct powerpc_operand.  */
 198
 199 /* This operand takes signed values.  */
 200 #define PPC_OPERAND_SIGNED (01)
 201
 202 /* This operand takes signed values, but also accepts a full positive
 203    range of values when running in 32 bit mode.  That is, if bits is
 204    16, it takes any value from -0x8000 to 0xffff.  In 64 bit mode,
 205    this flag is ignored.  */
 206 #define PPC_OPERAND_SIGNOPT (02)
 207
 208 /* This operand does not actually exist in the assembler input.  This
 209    is used to support extended mnemonics such as mr, for which two
 210    operands fields are identical.  The assembler should call the
 211    insert function with any op value.  The disassembler should call
 212    the extract function, ignore the return value, and check the value
 213    placed in the valid argument.  */
 214 #define PPC_OPERAND_FAKE (04)
 215
 216 /* The next operand should be wrapped in parentheses rather than
 217    separated from this one by a comma.  This is used for the load and
 218    store instructions which want their operands to look like
 219        reg,displacement(reg)
 220    */
 221 #define PPC_OPERAND_PARENS (010)
 222
 223 /* This operand may use the symbolic names for the CR fields, which
 224    are
 225        lt  0    gt  1   eq  2   so  3   un  3
 226        cr0 0    cr1 1   cr2 2   cr3 3
 227        cr4 4    cr5 5   cr6 6   cr7 7
 228    These may be combined arithmetically, as in cr2*4+gt.  These are
 229    only supported on the PowerPC, not the POWER.  */
 230 #define PPC_OPERAND_CR (020)
 231
 232 /* This operand names a register.  The disassembler uses this to print
 233    register names with a leading 'r'.  */
 234 #define PPC_OPERAND_GPR (040)
 235
 236 /* Like PPC_OPERAND_GPR, but don't print a leading 'r' for r0.  */
 237 #define PPC_OPERAND_GPR_0 (0100)
 238
 239 /* This operand names a floating point register.  The disassembler
 240    prints these with a leading 'f'.  */
 241 #define PPC_OPERAND_FPR (0200)
 242
 243 /* This operand is a relative branch displacement.  The disassembler
 244    prints these symbolically if possible.  */
 245 #define PPC_OPERAND_RELATIVE (0400)
 246
 247 /* This operand is an absolute branch address.  The disassembler
 248    prints these symbolically if possible.  */
 249 #define PPC_OPERAND_ABSOLUTE (01000)
 250
 251 /* This operand is optional, and is zero if omitted.  This is used for
 252    example, in the optional BF field in the comparison instructions.  The
 253    assembler must count the number of operands remaining on the line,
 254    and the number of operands remaining for the opcode, and decide
 255    whether this operand is present or not.  The disassembler should
 256    print this operand out only if it is not zero.  */
 257 #define PPC_OPERAND_OPTIONAL (02000)
 258
 259 /* This flag is only used with PPC_OPERAND_OPTIONAL.  If this operand
 260    is omitted, then for the next operand use this operand value plus
 261    1, ignoring the next operand field for the opcode.  This wretched
 262    hack is needed because the Power rotate instructions can take
 263    either 4 or 5 operands.  The disassembler should print this operand
 264    out regardless of the PPC_OPERAND_OPTIONAL field.  */
 265 #define PPC_OPERAND_NEXT (04000)
 266
 267 /* This operand should be regarded as a negative number for the
 268    purposes of overflow checking (i.e., the normal most negative
 269    number is disallowed and one more than the normal most positive
 270    number is allowed).  This flag will only be set for a signed
 271    operand.  */
 272 #define PPC_OPERAND_NEGATIVE (010000)
 273
 274 /* This operand names a vector unit register.  The disassembler
 275    prints these with a leading 'v'.  */
 276 #define PPC_OPERAND_VR (020000)
 277
 278 /* This operand is for the DS field in a DS form instruction.  */
 279 #define PPC_OPERAND_DS (040000)
 280
 281 /* This operand is for the DQ field in a DQ form instruction.  */
 282 #define PPC_OPERAND_DQ (0100000)
 283 \f
 284 /* The POWER and PowerPC assemblers use a few macros.  We keep them
 285    with the operands table for simplicity.  The macro table is an
 286    array of struct powerpc_macro.  */
 287
 288 struct powerpc_macro
 289 {
 290   /* The macro name.  */
 291   const char *name;
 292
 293   /* The number of operands the macro takes.  */
 294   unsigned int operands;
 295
 296   /* One bit flags for the opcode.  These are used to indicate which
 297      specific processors support the instructions.  The values are the
 298      same as those for the struct powerpc_opcode flags field.  */
 299   unsigned long flags;
 300
 301   /* A format string to turn the macro into a normal instruction.
 302      Each %N in the string is replaced with operand number N (zero
 303      based).  */
 304   const char *format;
 305 };
 306
 307 extern const struct powerpc_macro powerpc_macros[];
 308 extern const int powerpc_num_macros;
 309
 310 #endif /* PPC_H */