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-/* ppc.h -- Header file for PowerPC opcode table
- Copyright 1994 Free Software Foundation, Inc.
- Written by Ian Lance Taylor, Cygnus Support
-
-This file is part of GDB, GAS, and the GNU binutils.
-
-GDB, GAS, and the GNU binutils are free software; you can redistribute
-them and/or modify them under the terms of the GNU General Public
-License as published by the Free Software Foundation; either version
-1, or (at your option) any later version.
-
-GDB, GAS, and the GNU binutils are distributed in the hope that they
-will be useful, but WITHOUT ANY WARRANTY; without even the implied
-warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
-the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this file; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#ifndef PPC_H
-#define PPC_H
-
-/* The opcode table is an array of struct powerpc_opcode. */
-
-struct powerpc_opcode
-{
- /* The opcode name. */
- const char *name;
-
- /* The opcode itself. Those bits which will be filled in with
- operands are zeroes. */
- unsigned long opcode;
-
- /* The opcode mask. This is used by the disassembler. This is a
- mask containing ones indicating those bits which must match the
- opcode field, and zeroes indicating those bits which need not
- match (and are presumably filled in by operands). */
- unsigned long mask;
-
- /* One bit flags for the opcode. These are used to indicate which
- specific processors support the instructions. The defined values
- are listed below. */
- unsigned long flags;
-
- /* An array of operand codes. Each code is an index into the
- operand table. They appear in the order which the operands must
- appear in assembly code, and are terminated by a zero. */
- unsigned char operands[8];
-};
-
-/* The table itself is sorted by major opcode number, and is otherwise
- in the order in which the disassembler should consider
- instructions. */
-extern const struct powerpc_opcode powerpc_opcodes[];
-extern const int powerpc_num_opcodes;
-
-/* Values defined for the flags field of a struct powerpc_opcode. */
-
-/* Opcode is defined for the PowerPC architecture. */
-#define PPC_OPCODE_PPC (01)
-
-/* Opcode is defined for the POWER (RS/6000) architecture. */
-#define PPC_OPCODE_POWER (02)
-
-/* Opcode is defined for the POWER2 (Rios 2) architecture. */
-#define PPC_OPCODE_POWER2 (04)
-
-/* Opcode is only defined on 32 bit architectures. */
-#define PPC_OPCODE_32 (010)
-
-/* Opcode is only defined on 64 bit architectures. */
-#define PPC_OPCODE_64 (020)
-
-/* Opcode is supported by the Motorola PowerPC 601 processor. The 601
- is assumed to support all PowerPC (PPC_OPCODE_PPC) instructions,
- but it also supports many additional POWER instructions. */
-#define PPC_OPCODE_601 (040)
-
-/* A macro to extract the major opcode from an instruction. */
-#define PPC_OP(i) (((i) >> 26) & 0x3f)
-
-/* The operands table is an array of struct powerpc_operand. */
-
-struct powerpc_operand
-{
- /* The number of bits in the operand. */
- int bits;
-
- /* How far the operand is left shifted in the instruction. */
- int shift;
-
- /* Insertion function. This is used by the assembler. To insert an
- operand value into an instruction, check this field.
-
- If it is NULL, execute
- i |= (op & ((1 << o->bits) - 1)) << o->shift;
- (i is the instruction which we are filling in, o is a pointer to
- this structure, and op is the opcode value; this assumes twos
- complement arithmetic).
-
- If this field is not NULL, then simply call it with the
- instruction and the operand value. It will return the new value
- of the instruction. If the ERRMSG argument is not NULL, then if
- the operand value is illegal, *ERRMSG will be set to a warning
- string (the operand will be inserted in any case). If the
- operand value is legal, *ERRMSG will be unchanged (most operands
- can accept any value). */
- unsigned long (*insert) PARAMS ((unsigned long instruction, long op,
- const char **errmsg));
-
- /* Extraction function. This is used by the disassembler. To
- extract this operand type from an instruction, check this field.
-
- If it is NULL, compute
- op = ((i) >> o->shift) & ((1 << o->bits) - 1);
- if ((o->flags & PPC_OPERAND_SIGNED) != 0
- && (op & (1 << (o->bits - 1))) != 0)
- op -= 1 << o->bits;
- (i is the instruction, o is a pointer to this structure, and op
- is the result; this assumes twos complement arithmetic).
-
- If this field is not NULL, then simply call it with the
- instruction value. It will return the value of the operand. If
- the INVALID argument is not NULL, *INVALID will be set to
- non-zero if this operand type can not actually be extracted from
- this operand (i.e., the instruction does not match). If the
- operand is valid, *INVALID will not be changed. */
- long (*extract) PARAMS ((unsigned long instruction, int *invalid));
-
- /* One bit syntax flags. */
- unsigned long flags;
-};
-
-/* Elements in the table are retrieved by indexing with values from
- the operands field of the powerpc_opcodes table. */
-
-extern const struct powerpc_operand powerpc_operands[];
-
-/* Values defined for the flags field of a struct powerpc_operand. */
-
-/* This operand takes signed values. */
-#define PPC_OPERAND_SIGNED (01)
-
-/* This operand takes signed values, but also accepts a full positive
- range of values when running in 32 bit mode. That is, if bits is
- 16, it takes any value from -0x8000 to 0xffff. In 64 bit mode,
- this flag is ignored. */
-#define PPC_OPERAND_SIGNOPT (02)
-
-/* This operand does not actually exist in the assembler input. This
- is used to support extended mnemonics such as mr, for which two
- operands fields are identical. The assembler should call the
- insert function with any op value. The disassembler should call
- the extract function, ignore the return value, and check the value
- placed in the valid argument. */
-#define PPC_OPERAND_FAKE (04)
-
-/* The next operand should be wrapped in parentheses rather than
- separated from this one by a comma. This is used for the load and
- store instructions which want their operands to look like
- reg,displacement(reg)
- */
-#define PPC_OPERAND_PARENS (010)
-
-/* This operand may use the symbolic names for the CR fields, which
- are
- lt 0 gt 1 eq 2 so 3 un 3
- cr0 0 cr1 1 cr2 2 cr3 3
- cr4 4 cr5 5 cr6 6 cr7 7
- These may be combined arithmetically, as in cr2*4+gt. These are
- only supported on the PowerPC, not the POWER. */
-#define PPC_OPERAND_CR (020)
-
-/* This operand names a register. The disassembler uses this to print
- register names with a leading 'r'. */
-#define PPC_OPERAND_GPR (040)
-
-/* This operand names a floating point register. The disassembler
- prints these with a leading 'f'. */
-#define PPC_OPERAND_FPR (0100)
-
-/* This operand is a relative branch displacement. The disassembler
- prints these symbolically if possible. */
-#define PPC_OPERAND_RELATIVE (0200)
-
-/* This operand is an absolute branch address. The disassembler
- prints these symbolically if possible. */
-#define PPC_OPERAND_ABSOLUTE (0400)
-
-/* This operand is optional, and is zero if omitted. This is used for
- the optional BF and L fields in the comparison instructions. The
- assembler must count the number of operands remaining on the line,
- and the number of operands remaining for the opcode, and decide
- whether this operand is present or not. The disassembler should
- print this operand out only if it is not zero. */
-#define PPC_OPERAND_OPTIONAL (01000)
-
-/* This flag is only used with PPC_OPERAND_OPTIONAL. If this operand
- is omitted, then for the next operand use this operand value plus
- 1, ignoring the next operand field for the opcode. This wretched
- hack is needed because the Power rotate instructions can take
- either 4 or 5 operands. The disassembler should print this operand
- out regardless of the PPC_OPERAND_OPTIONAL field. */
-#define PPC_OPERAND_NEXT (02000)
-
-/* This operand should be regarded as a negative number for the
- purposes of overflow checking (i.e., the normal most negative
- number is disallowed and one more than the normal most positive
- number is allowed). This flag will only be set for a signed
- operand. */
-#define PPC_OPERAND_NEGATIVE (04000)
-
-/* The POWER and PowerPC assemblers use a few macros. We keep them
- with the operands table for simplicity. The macro table is an
- array of struct powerpc_macro. */
-
-struct powerpc_macro
-{
- /* The macro name. */
- const char *name;
-
- /* The number of operands the macro takes. */
- unsigned int operands;
-
- /* One bit flags for the opcode. These are used to indicate which
- specific processors support the instructions. The values are the
- same as those for the struct powerpc_opcode flags field. */
- unsigned long flags;
-
- /* A format string to turn the macro into a normal instruction.
- Each %N in the string is replaced with operand number N (zero
- based). */
- const char *format;
-};
-
-extern const struct powerpc_macro powerpc_macros[];
-extern const int powerpc_num_macros;
-
-#endif /* PPC_H */