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/* Opcode table header for m680[01234]0/m6888[12]/m68851.
Copyright 1989, 1991, 1992, 1993, 1994, 1995 Free Software Foundation.
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. */
/* These are used as bit flags for the arch field in the m68k_opcode
structure. */
#define _m68k_undef 0
#define m68000 0x001
#define m68008 m68000 /* synonym for -m68000. otherwise unused. */
#define m68010 0x002
#define m68020 0x004
#define m68030 0x008
#define m68ec030 m68030 /* similar enough to -m68030 to ignore differences;
gas will deal with the few differences. */
#define m68040 0x010
/* there is no 68050 */
#define m68060 0x020
#define m68881 0x040
#define m68882 m68881 /* synonym for -m68881. otherwise unused. */
#define m68851 0x080
#define cpu32 0x100 /* e.g., 68332 */
/* handy aliases */
#define m68040up (m68040 | m68060)
#define m68030up (m68030 | m68040up)
#define m68020up (m68020 | m68030up)
#define m68010up (m68010 | cpu32 | m68020up)
#define m68000up (m68000 | m68010up)
#define mfloat (m68881 | m68882 | m68040 | m68060)
#define mmmu (m68851 | m68030 | m68040 | m68060)
/* The structure used to hold information for an opcode. */
struct m68k_opcode
{
/* The opcode name. */
const char *name;
/* The opcode itself. */
unsigned long opcode;
/* The mask used by the disassembler. */
unsigned long match;
/* The arguments. */
const char *args;
/* The architectures which support this opcode. */
unsigned int arch;
};
/* The structure used to hold information for an opcode alias. */
struct m68k_opcode_alias
{
/* The alias name. */
const char *alias;
/* The instruction for which this is an alias. */
const char *primary;
};
/* We store four bytes of opcode for all opcodes because that is the
most any of them need. The actual length of an instruction is
always at least 2 bytes, and is as much longer as necessary to hold
the operands it has.
The match field is a mask saying which bits must match particular
opcode in order for an instruction to be an instance of that
opcode.
The args field is a string containing two characters for each
operand of the instruction. The first specifies the kind of
operand; the second, the place it is stored. */
/* Kinds of operands:
Characters used: AaBCcDdFfIJkLlMOQRrSsTtUVWXYZ0123|*~%;@!&$?/#^+-
D data register only. Stored as 3 bits.
A address register only. Stored as 3 bits.
a address register indirect only. Stored as 3 bits.
R either kind of register. Stored as 4 bits.
r either kind of register indirect only. Stored as 4 bits.
At the moment, used only for cas2 instruction.
F floating point coprocessor register only. Stored as 3 bits.
O an offset (or width): immediate data 0-31 or data register.
Stored as 6 bits in special format for BF... insns.
+ autoincrement only. Stored as 3 bits (number of the address register).
- autodecrement only. Stored as 3 bits (number of the address register).
Q quick immediate data. Stored as 3 bits.
This matches an immediate operand only when value is in range 1 .. 8.
M moveq immediate data. Stored as 8 bits.
This matches an immediate operand only when value is in range -128..127
T trap vector immediate data. Stored as 4 bits.
k K-factor for fmove.p instruction. Stored as a 7-bit constant or
a three bit register offset, depending on the field type.
# immediate data. Stored in special places (b, w or l)
which say how many bits to store.
^ immediate data for floating point instructions. Special places
are offset by 2 bytes from '#'...
B pc-relative address, converted to an offset
that is treated as immediate data.
d displacement and register. Stores the register as 3 bits
and stores the displacement in the entire second word.
C the CCR. No need to store it; this is just for filtering validity.
S the SR. No need to store, just as with CCR.
U the USP. No need to store, just as with CCR.
I Coprocessor ID. Not printed if 1. The Coprocessor ID is always
extracted from the 'd' field of word one, which means that an extended
coprocessor opcode can be skipped using the 'i' place, if needed.
s System Control register for the floating point coprocessor.
J Misc register for movec instruction, stored in 'j' format.
Possible values:
0x000 SFC Source Function Code reg [60, 40, 30, 20, 10]
0x001 DFC Data Function Code reg [60, 40, 30, 20, 10]
0x002 CACR Cache Control Register [60, 40, 30, 20]
0x003 TC MMU Translation Control [60, 40]
0x004 ITT0 Instruction Transparent
Translation reg 0 [60, 40]
0x005 ITT1 Instruction Transparent
Translation reg 1 [60, 40]
0x006 DTT0 Data Transparent
Translation reg 0 [60, 40]
0x007 DTT1 Data Transparent
Translation reg 1 [60, 40]
0x008 BUSCR Bus Control Register [60]
0x800 USP User Stack Pointer [60, 40, 30, 20, 10]
0x801 VBR Vector Base reg [60, 40, 30, 20, 10]
0x802 CAAR Cache Address Register [ 30, 20]
0x803 MSP Master Stack Pointer [ 40, 30, 20]
0x804 ISP Interrupt Stack Pointer [ 40, 30, 20]
0x805 MMUSR MMU Status reg [ 40]
0x806 URP User Root Pointer [60, 40]
0x807 SRP Supervisor Root Pointer [60, 40]
0x808 PCR Processor Configuration reg [60]
L Register list of the type d0-d7/a0-a7 etc.
(New! Improved! Can also hold fp0-fp7, as well!)
The assembler tries to see if the registers match the insn by
looking at where the insn wants them stored.
l Register list like L, but with all the bits reversed.
Used for going the other way. . .
c cache identifier which may be "nc" for no cache, "ic"
for instruction cache, "dc" for data cache, or "bc"
for both caches. Used in cinv and cpush. Always
stored in position "d".
The remainder are all stored as 6 bits using an address mode and a
register number; they differ in which addressing modes they match.
* all (modes 0-6,7.*)
~ alterable memory (modes 2-6,7.0,7.1)
(not 0,1,7.~)
% alterable (modes 0-6,7.0,7.1)(not 7.~)
; data (modes 0,2-6,7.*)(not 1)
@ data, but not immediate (modes 0,2-6,7.? ? ?)
(not 1,7.?)
This may really be ;,
the 68020 book says it is
! control (modes 2,5,6,7.*-)
(not 0,1,3,4,7.4)
& alterable control (modes 2,5,6,7.0,7.1)
(not 0,1,7.? ? ?)
$ alterable data (modes 0,2-6,7.0,7.1)
(not 1,7.~)
? alterable control, or data register (modes 0,2,5,6,7.0,7.1)
(not 1,3,4,7.~)
/ control, or data register (modes 0,2,5,6,7.0,7.1,7.2,7.3)
(not 1,3,4,7.4)
` control, plus pre-dec, not simple indir. (modes 4,5,6,7.*-)
(not 0,1,2,3,7.4) */
/* For the 68851: */
/*
I didn't use much imagination in choosing the
following codes, so many of them aren't very
mnemonic. -rab
0 32 bit pmmu register
Possible values:
000 TC Translation Control Register (68030, 68851)
1 16 bit pmmu register
111 AC Access Control (68851)
2 8 bit pmmu register
100 CAL Current Access Level (68851)
101 VAL Validate Access Level (68851)
110 SCC Stack Change Control (68851)
3 68030-only pmmu registers (32 bit)
010 TT0 Transparent Translation reg 0
(aka Access Control reg 0 -- AC0 -- on 68ec030)
011 TT1 Transparent Translation reg 1
(aka Access Control reg 1 -- AC1 -- on 68ec030)
W wide pmmu registers
Possible values:
001 DRP Dma Root Pointer (68851)
010 SRP Supervisor Root Pointer (68030, 68851)
011 CRP Cpu Root Pointer (68030, 68851)
f function code register (68030, 68851)
0 SFC
1 DFC
V VAL register only (68851)
X BADx, BACx (16 bit)
100 BAD Breakpoint Acknowledge Data (68851)
101 BAC Breakpoint Acknowledge Control (68851)
Y PSR (68851) (MMUSR on 68030) (ACUSR on 68ec030)
Z PCSR (68851)
| memory (modes 2-6, 7.*)
t address test level (68030 only)
Stored as 3 bits, range 0-7.
Also used for breakpoint instruction now.
*/
/* Places to put an operand, for non-general operands:
s source, low bits of first word.
d dest, shifted 9 in first word
1 second word, shifted 12
2 second word, shifted 6
3 second word, shifted 0
4 third word, shifted 12
5 third word, shifted 6
6 third word, shifted 0
7 second word, shifted 7
8 second word, shifted 10
9 second word, shifted 5
D store in both place 1 and place 3; for divul and divsl.
B first word, low byte, for branch displacements
W second word (entire), for branch displacements
L second and third words (entire), for branch displacements
(also overloaded for move16)
b second word, low byte
w second word (entire) [variable word/long branch offset for dbra]
W second word (entire) (must be signed 16 bit value)
l second and third word (entire)
g variable branch offset for bra and similar instructions.
The place to store depends on the magnitude of offset.
t store in both place 7 and place 8; for floating point operations
c branch offset for cpBcc operations.
The place to store is word two if bit six of word one is zero,
and words two and three if bit six of word one is one.
i Increment by two, to skip over coprocessor extended operands. Only
works with the 'I' format.
k Dynamic K-factor field. Bits 6-4 of word 2, used as a register number.
Also used for dynamic fmovem instruction.
C floating point coprocessor constant - 7 bits. Also used for static
K-factors...
j Movec register #, stored in 12 low bits of second word.
Places to put operand, for general operands:
d destination, shifted 6 bits in first word
b source, at low bit of first word, and immediate uses one byte
w source, at low bit of first word, and immediate uses two bytes
l source, at low bit of first word, and immediate uses four bytes
s source, at low bit of first word.
Used sometimes in contexts where immediate is not allowed anyway.
f single precision float, low bit of 1st word, immediate uses 4 bytes
F double precision float, low bit of 1st word, immediate uses 8 bytes
x extended precision float, low bit of 1st word, immediate uses 12 bytes
p packed float, low bit of 1st word, immediate uses 12 bytes
*/
extern const struct m68k_opcode m68k_opcodes[];
extern const struct m68k_opcode_alias m68k_opcode_aliases[];
extern const int m68k_numopcodes, m68k_numaliases;
/* end of m68k-opcode.h */
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