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cebix |
1.1 |
/* Opcode table header for m680[01234]0/m6888[12]/m68851. |
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Copyright 1989, 91, 92, 93, 94, 95, 96, 1997 Free Software Foundation. |
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This file is part of GDB, GAS, and the GNU binutils. |
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GDB, GAS, and the GNU binutils are free software; you can redistribute |
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them and/or modify them under the terms of the GNU General Public |
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License as published by the Free Software Foundation; either version |
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1, or (at your option) any later version. |
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GDB, GAS, and the GNU binutils are distributed in the hope that they |
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will be useful, but WITHOUT ANY WARRANTY; without even the implied |
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
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the GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this file; see the file COPYING. If not, write to the Free |
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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02111-1307, USA. */ |
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/* These are used as bit flags for the arch field in the m68k_opcode |
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structure. */ |
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#define _m68k_undef 0 |
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#define m68000 0x001 |
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#define m68008 m68000 /* synonym for -m68000. otherwise unused. */ |
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#define m68010 0x002 |
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#define m68020 0x004 |
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#define m68030 0x008 |
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#define m68ec030 m68030 /* similar enough to -m68030 to ignore differences; |
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gas will deal with the few differences. */ |
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#define m68040 0x010 |
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/* there is no 68050 */ |
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#define m68060 0x020 |
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#define m68881 0x040 |
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#define m68882 m68881 /* synonym for -m68881. otherwise unused. */ |
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#define m68851 0x080 |
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#define cpu32 0x100 /* e.g., 68332 */ |
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#define mcf5200 0x200 |
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/* handy aliases */ |
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#define m68040up (m68040 | m68060) |
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#define m68030up (m68030 | m68040up) |
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#define m68020up (m68020 | m68030up) |
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#define m68010up (m68010 | cpu32 | m68020up) |
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#define m68000up (m68000 | m68010up) |
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#define mfloat (m68881 | m68882 | m68040 | m68060) |
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#define mmmu (m68851 | m68030 | m68040 | m68060) |
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/* The structure used to hold information for an opcode. */ |
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struct m68k_opcode |
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{ |
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/* The opcode name. */ |
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const char *name; |
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/* The opcode itself. */ |
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unsigned long opcode; |
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/* The mask used by the disassembler. */ |
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unsigned long match; |
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/* The arguments. */ |
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const char *args; |
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/* The architectures which support this opcode. */ |
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unsigned int arch; |
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}; |
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/* The structure used to hold information for an opcode alias. */ |
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struct m68k_opcode_alias |
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{ |
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/* The alias name. */ |
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const char *alias; |
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/* The instruction for which this is an alias. */ |
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const char *primary; |
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}; |
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/* We store four bytes of opcode for all opcodes because that is the |
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most any of them need. The actual length of an instruction is |
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always at least 2 bytes, and is as much longer as necessary to hold |
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the operands it has. |
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The match field is a mask saying which bits must match particular |
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opcode in order for an instruction to be an instance of that |
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opcode. |
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The args field is a string containing two characters for each |
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operand of the instruction. The first specifies the kind of |
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operand; the second, the place it is stored. */ |
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/* Kinds of operands: |
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Characters used: AaBCcDdFfIJkLlMmnOopQqRrSsTtUVvWXYZ0123|*~%;@!&$?/<>#^+- |
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D data register only. Stored as 3 bits. |
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A address register only. Stored as 3 bits. |
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a address register indirect only. Stored as 3 bits. |
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R either kind of register. Stored as 4 bits. |
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r either kind of register indirect only. Stored as 4 bits. |
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At the moment, used only for cas2 instruction. |
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F floating point coprocessor register only. Stored as 3 bits. |
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O an offset (or width): immediate data 0-31 or data register. |
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Stored as 6 bits in special format for BF... insns. |
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+ autoincrement only. Stored as 3 bits (number of the address register). |
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- autodecrement only. Stored as 3 bits (number of the address register). |
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Q quick immediate data. Stored as 3 bits. |
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This matches an immediate operand only when value is in range 1 .. 8. |
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M moveq immediate data. Stored as 8 bits. |
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This matches an immediate operand only when value is in range -128..127 |
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T trap vector immediate data. Stored as 4 bits. |
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k K-factor for fmove.p instruction. Stored as a 7-bit constant or |
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a three bit register offset, depending on the field type. |
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# immediate data. Stored in special places (b, w or l) |
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which say how many bits to store. |
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^ immediate data for floating point instructions. Special places |
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are offset by 2 bytes from '#'... |
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B pc-relative address, converted to an offset |
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that is treated as immediate data. |
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d displacement and register. Stores the register as 3 bits |
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and stores the displacement in the entire second word. |
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C the CCR. No need to store it; this is just for filtering validity. |
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S the SR. No need to store, just as with CCR. |
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U the USP. No need to store, just as with CCR. |
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I Coprocessor ID. Not printed if 1. The Coprocessor ID is always |
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extracted from the 'd' field of word one, which means that an extended |
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coprocessor opcode can be skipped using the 'i' place, if needed. |
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s System Control register for the floating point coprocessor. |
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J Misc register for movec instruction, stored in 'j' format. |
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Possible values: |
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0x000 SFC Source Function Code reg [60, 40, 30, 20, 10] |
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0x001 DFC Data Function Code reg [60, 40, 30, 20, 10] |
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0x002 CACR Cache Control Register [60, 40, 30, 20] |
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0x003 TC MMU Translation Control [60, 40] |
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0x004 ITT0 Instruction Transparent |
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Translation reg 0 [60, 40] |
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0x005 ITT1 Instruction Transparent |
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Translation reg 1 [60, 40] |
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0x006 DTT0 Data Transparent |
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Translation reg 0 [60, 40] |
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0x007 DTT1 Data Transparent |
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Translation reg 1 [60, 40] |
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0x008 BUSCR Bus Control Register [60] |
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0x800 USP User Stack Pointer [60, 40, 30, 20, 10] |
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0x801 VBR Vector Base reg [60, 40, 30, 20, 10] |
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0x802 CAAR Cache Address Register [ 30, 20] |
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0x803 MSP Master Stack Pointer [ 40, 30, 20] |
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0x804 ISP Interrupt Stack Pointer [ 40, 30, 20] |
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0x805 MMUSR MMU Status reg [ 40] |
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0x806 URP User Root Pointer [60, 40] |
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0x807 SRP Supervisor Root Pointer [60, 40] |
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0x808 PCR Processor Configuration reg [60] |
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0xC00 ROMBAR ROM Base Address Register [520X] |
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0xC04 RAMBAR0 RAM Base Address Register 0 [520X] |
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0xC05 RAMBAR1 RAM Base Address Register 0 [520X] |
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0xC0F MBAR0 RAM Base Address Register 0 [520X] |
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L Register list of the type d0-d7/a0-a7 etc. |
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(New! Improved! Can also hold fp0-fp7, as well!) |
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The assembler tries to see if the registers match the insn by |
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looking at where the insn wants them stored. |
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l Register list like L, but with all the bits reversed. |
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Used for going the other way. . . |
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c cache identifier which may be "nc" for no cache, "ic" |
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for instruction cache, "dc" for data cache, or "bc" |
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for both caches. Used in cinv and cpush. Always |
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stored in position "d". |
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The remainder are all stored as 6 bits using an address mode and a |
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register number; they differ in which addressing modes they match. |
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* all (modes 0-6,7.0-4) |
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~ alterable memory (modes 2-6,7.0,7.1) |
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(not 0,1,7.2-4) |
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% alterable (modes 0-6,7.0,7.1) |
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(not 7.2-4) |
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; data (modes 0,2-6,7.0-4) |
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(not 1) |
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@ data, but not immediate (modes 0,2-6,7.0-3) |
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(not 1,7.4) |
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! control (modes 2,5,6,7.0-3) |
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(not 0,1,3,4,7.4) |
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& alterable control (modes 2,5,6,7.0,7.1) |
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(not 0,1,7.2-4) |
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$ alterable data (modes 0,2-6,7.0,7.1) |
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(not 1,7.2-4) |
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? alterable control, or data register (modes 0,2,5,6,7.0,7.1) |
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(not 1,3,4,7.2-4) |
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/ control, or data register (modes 0,2,5,6,7.0-3) |
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(not 1,3,4,7.4) |
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> *save operands (modes 2,4,5,6,7.0,7.1) |
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(not 0,1,3,7.2-4) |
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< *restore operands (modes 2,3,5,6,7.0-3) |
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(not 0,1,4,7.4) |
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coldfire move operands: |
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m (modes 0-4) |
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n (modes 5,7.2) |
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o (modes 6,7.0,7.1,7.3,7.4) |
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p (modes 0-5) |
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coldfire bset/bclr/btst operands: |
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q (modes 0,2-5) |
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v (modes 0,2-5,7.0,7.1) |
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*/ |
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/* For the 68851: */ |
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/* |
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I didn't use much imagination in choosing the |
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following codes, so many of them aren't very |
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mnemonic. -rab |
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0 32 bit pmmu register |
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Possible values: |
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000 TC Translation Control Register (68030, 68851) |
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1 16 bit pmmu register |
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111 AC Access Control (68851) |
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2 8 bit pmmu register |
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100 CAL Current Access Level (68851) |
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101 VAL Validate Access Level (68851) |
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110 SCC Stack Change Control (68851) |
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3 68030-only pmmu registers (32 bit) |
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010 TT0 Transparent Translation reg 0 |
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(aka Access Control reg 0 -- AC0 -- on 68ec030) |
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011 TT1 Transparent Translation reg 1 |
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(aka Access Control reg 1 -- AC1 -- on 68ec030) |
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W wide pmmu registers |
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Possible values: |
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001 DRP Dma Root Pointer (68851) |
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010 SRP Supervisor Root Pointer (68030, 68851) |
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011 CRP Cpu Root Pointer (68030, 68851) |
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f function code register (68030, 68851) |
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0 SFC |
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1 DFC |
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V VAL register only (68851) |
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X BADx, BACx (16 bit) |
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100 BAD Breakpoint Acknowledge Data (68851) |
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101 BAC Breakpoint Acknowledge Control (68851) |
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Y PSR (68851) (MMUSR on 68030) (ACUSR on 68ec030) |
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Z PCSR (68851) |
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| memory (modes 2-6, 7.*) |
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t address test level (68030 only) |
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Stored as 3 bits, range 0-7. |
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Also used for breakpoint instruction now. |
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*/ |
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/* Places to put an operand, for non-general operands: |
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s source, low bits of first word. |
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d dest, shifted 9 in first word |
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1 second word, shifted 12 |
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2 second word, shifted 6 |
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3 second word, shifted 0 |
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4 third word, shifted 12 |
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5 third word, shifted 6 |
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6 third word, shifted 0 |
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7 second word, shifted 7 |
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8 second word, shifted 10 |
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9 second word, shifted 5 |
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D store in both place 1 and place 3; for divul and divsl. |
| 275 |
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B first word, low byte, for branch displacements |
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W second word (entire), for branch displacements |
| 277 |
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L second and third words (entire), for branch displacements |
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(also overloaded for move16) |
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b second word, low byte |
| 280 |
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w second word (entire) [variable word/long branch offset for dbra] |
| 281 |
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W second word (entire) (must be signed 16 bit value) |
| 282 |
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l second and third word (entire) |
| 283 |
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g variable branch offset for bra and similar instructions. |
| 284 |
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The place to store depends on the magnitude of offset. |
| 285 |
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t store in both place 7 and place 8; for floating point operations |
| 286 |
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c branch offset for cpBcc operations. |
| 287 |
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The place to store is word two if bit six of word one is zero, |
| 288 |
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and words two and three if bit six of word one is one. |
| 289 |
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i Increment by two, to skip over coprocessor extended operands. Only |
| 290 |
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works with the 'I' format. |
| 291 |
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k Dynamic K-factor field. Bits 6-4 of word 2, used as a register number. |
| 292 |
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Also used for dynamic fmovem instruction. |
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C floating point coprocessor constant - 7 bits. Also used for static |
| 294 |
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K-factors... |
| 295 |
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j Movec register #, stored in 12 low bits of second word. |
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| 297 |
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Places to put operand, for general operands: |
| 298 |
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d destination, shifted 6 bits in first word |
| 299 |
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b source, at low bit of first word, and immediate uses one byte |
| 300 |
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w source, at low bit of first word, and immediate uses two bytes |
| 301 |
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l source, at low bit of first word, and immediate uses four bytes |
| 302 |
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s source, at low bit of first word. |
| 303 |
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Used sometimes in contexts where immediate is not allowed anyway. |
| 304 |
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f single precision float, low bit of 1st word, immediate uses 4 bytes |
| 305 |
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F double precision float, low bit of 1st word, immediate uses 8 bytes |
| 306 |
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x extended precision float, low bit of 1st word, immediate uses 12 bytes |
| 307 |
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p packed float, low bit of 1st word, immediate uses 12 bytes |
| 308 |
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*/ |
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| 310 |
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extern const struct m68k_opcode m68k_opcodes[]; |
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extern const struct m68k_opcode_alias m68k_opcode_aliases[]; |
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| 313 |
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extern const int m68k_numopcodes, m68k_numaliases; |
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/* end of m68k-opcode.h */ |
