/* Table of opcodes for the Motorola M88k family.
Copyright 1989, 1990, 1991, 1993, 2001, 2002, 2010
Free Software Foundation, Inc.
This file is part of GDB and GAS.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it 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 program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/*
* Disassembler Instruction Table
*
* The first field of the table is the opcode field. If an opcode
* is specified which has any non-opcode bits on, a system error
* will occur when the system attempts the install it into the
* instruction table. The second parameter is a pointer to the
* instruction mnemonic. Each operand is specified by offset, width,
* and type. The offset is the bit number of the least significant
* bit of the operand with bit 0 being the least significant bit of
* the instruction. The width is the number of bits used to specify
* the operand. The type specifies the output format to be used for
* the operand. The valid formats are: register, register indirect,
* hex constant, and bit field specification. The last field is a
* pointer to the next instruction in the linked list. These pointers
* are initialized by init_disasm().
*
* Revision History
*
* Revision 1.0 11/08/85 Creation date
* 1.1 02/05/86 Updated instruction mnemonic table MD
* 1.2 06/16/86 Updated SIM_FLAGS for floating point
* 1.3 09/20/86 Updated for new encoding
* 05/11/89 R. Trawick adapted from Motorola disassembler
*/
#include <stdio.h>
/* Define the number of bits in the primary opcode field of the instruction,
the destination field, the source 1 and source 2 fields. */
/* Size of opcode field. */
#define OP 8
/* Size of destination. */
#define DEST 6
/* Size of source1. */
#define SOURCE1 6
/* Size of source2. */
#define SOURCE2 6
/* Number of registers. */
#define REGs 32
/* Type definitions. */
typedef unsigned int UINT;
#define WORD long
#define FLAG unsigned
#define STATE short
/* The next four equates define the priorities that the various classes
* of instructions have regarding writing results back into registers and
* signalling exceptions. */
/* PMEM is also defined in <sys/param.h> on Delta 88's. Sigh! */
#undef PMEM
/* Integer priority. */
#define PINT 0
/* Floating point priority. */
#define PFLT 1
/* Memory priority. */
#define PMEM 2
/* Not applicable, instruction doesn't write to regs. */
#define NA 3
/* Highest of these priorities. */
#define HIPRI 3
/* The instruction registers are an artificial mechanism to speed up
* simulator execution. In the real processor, an instruction register
* is 32 bits wide. In the simulator, the 32 bit instruction is kept in
* a structure field called rawop, and the instruction is partially decoded,
* and split into various fields and flags which make up the other fields
* of the structure.
* The partial decode is done when the instructions are initially loaded
* into simulator memory. The simulator code memory is not an array of
* 32 bit words, but is an array of instruction register structures.
* Yes this wastes memory, but it executes much quicker.
*/
struct IR_FIELDS
{
unsigned op:OP,
dest: DEST,
src1: SOURCE1,
src2: SOURCE2;
int ltncy,
extime,
/* Writeback priority. */
wb_pri;
/* Immediate size. */
unsigned imm_flags:2,
/* Register source 1 used. */
rs1_used:1,
/* Register source 2 used. */
rs2_used:1,
/* Register source/dest. used. */
rsd_used:1,
/* Complement. */
c_flag:1,
/* Upper half word. */
u_flag:1,
/* Execute next. */
n_flag:1,
/* Uses writeback slot. */
wb_flag:1,
/* Dest size. */
dest_64:1,
/* Source 1 size. */
s1_64:1,
/* Source 2 size. */
s2_64:1,
scale_flag:1,
/* Scaled register. */
brk_flg:1;
};
struct mem_segs
{
/* Pointer (returned by calloc) to segment. */
struct mem_wrd *seg;
/* Base load address from file headers. */
unsigned long baseaddr;
/* Ending address of segment. */
unsigned long endaddr;
/* Segment control flags (none defined). */
int flags;
};
#define MAXSEGS (10) /* max number of segment allowed */
#define MEMSEGSIZE (sizeof(struct mem_segs))/* size of mem_segs structure */
#if 0
#define BRK_RD (0x01) /* break on memory read */
#define BRK_WR (0x02) /* break on memory write */
#define BRK_EXEC (0x04) /* break on execution */
#define BRK_CNT (0x08) /* break on terminal count */
#endif
struct mem_wrd
{
/* Simulator instruction break down. */
struct IR_FIELDS opcode;
union {
/* Memory element break down. */
unsigned long l;
unsigned short s[2];
unsigned char c[4];
} mem;
};
/* Size of each 32 bit memory model. */
#define MEMWRDSIZE (sizeof (struct mem_wrd))
extern struct mem_segs memory[];
extern struct PROCESSOR m78000;
struct PROCESSOR
{
unsigned WORD
/* Execute instruction pointer. */
ip,
/* Vector base register. */
vbr,
/* Processor status register. */
psr;
/* Source 1. */
WORD S1bus,
/* Source 2. */
S2bus,
/* Destination. */
Dbus,
/* Data address bus. */
DAbus,
ALU,
/* Data registers. */
Regs[REGs],
/* Max clocks before reg is available. */
time_left[REGs],
/* Writeback priority of reg. */
wb_pri[REGs],
/* Integer unit control regs. */
SFU0_regs[REGs],
/* Floating point control regs. */
SFU1_regs[REGs],
Scoreboard[REGs],
Vbr;
unsigned WORD scoreboard,
Psw,
Tpsw;
/* Waiting for a jump instruction. */
FLAG jump_pending:1;
};
/* Size of immediate field. */
#define i26bit 1
#define i16bit 2
#define i10bit 3
/* Definitions for fields in psr. */
#define psr_mode 31
#define psr_rbo 30
#define psr_ser 29
#define psr_carry 28
#define psr_sf7m 11
#define psr_sf6m 10
#define psr_sf5m 9
#define psr_sf4m 8
#define psr_sf3m 7
#define psr_sf2m 6
#define psr_sf1m 5
#define psr_mam 4
#define psr_inm 3
#define psr_exm 2
#define psr_trm 1
#define psr_ovfm 0
/* The 1 clock operations. */
#define ADDU 1
#define ADDC 2
#define ADDUC 3
#define ADD 4
#define SUBU ADD+1
#define SUBB ADD+2
#define SUBUB ADD+3
#define SUB ADD+4
#define AND_ ADD+5
#define OR ADD+6
#define XOR ADD+7
#define CMP ADD+8
/* Loads. */
#define LDAB CMP+1
#define LDAH CMP+2
#define LDA CMP+3
#define LDAD CMP+4
#define LDB LDAD+1
#define LDH LDAD+2
#define LD LDAD+3
#define LDD LDAD+4
#define LDBU LDAD+5
#define LDHU LDAD+6
/* Stores. */
#define STB LDHU+1
#define STH LDHU+2
#define ST LDHU+3
#define STD LDHU+4
/* Exchange. */
#define XMEMBU LDHU+5
#define XMEM LDHU+6
/* Branches. */
#define JSR STD+1
#define BSR STD+2
#define BR STD+3
#define JMP STD+4
#define BB1 STD+5
#define BB0 STD+6
#define RTN STD+7
#define BCND STD+8
/* Traps. */
#define TB1 BCND+1
#define TB0 BCND+2
#define TCND BCND+3
#define RTE BCND+4
#define TBND BCND+5
/* Misc. */
#define MUL TBND + 1
#define DIV MUL +2
#define DIVU MUL +3
#define MASK MUL +4
#define FF0 MUL +5
#define FF1 MUL +6
#define CLR MUL +7
#define SET MUL +8
#define EXT MUL +9
#define EXTU MUL +10
#define MAK MUL +11
#define ROT MUL +12
/* Control register manipulations. */
#define LDCR ROT +1
#define STCR ROT +2
#define XCR ROT +3
#define FLDCR ROT +4
#define FSTCR ROT +5
#define FXCR ROT +6
#define NOP XCR +1
/* Floating point instructions. */
#define FADD NOP +1
#define FSUB NOP +2
#define FMUL NOP +3
#define FDIV NOP +4
#define FSQRT NOP +5
#define FCMP NOP +6
#define FIP NOP +7
#define FLT NOP +8
#define INT NOP +9
#define NINT NOP +10
#define TRNC NOP +11
#define FLDC NOP +12
#define FSTC NOP +13
#define FXC NOP +14
#define UEXT(src,off,wid) \
((((unsigned int)(src)) >> (off)) & ((1 << (wid)) - 1))
#define SEXT(src,off,wid) \
(((((int)(src))<<(32 - ((off) + (wid)))) >>(32 - (wid))) )
#define MAKE(src,off,wid) \
((((unsigned int)(src)) & ((1 << (wid)) - 1)) << (off))
#define opword(n) (unsigned long) (memaddr->mem.l)
/* Constants and masks. */
#define SFU0 0x80000000
#define SFU1 0x84000000
#define SFU7 0x9c000000
#define RRI10 0xf0000000
#define RRR 0xf4000000
#define SFUMASK 0xfc00ffe0
#define RRRMASK 0xfc00ffe0
#define RRI10MASK 0xfc00fc00
#define DEFMASK 0xfc000000
#define CTRL 0x0000f000
#define CTRLMASK 0xfc00f800
/* Operands types. */
enum operand_type
{
HEX = 1,
REG = 2,
CONT = 3,
IND = 3,
BF = 4,
/* Scaled register. */
REGSC = 5,
/* Control register. */
CRREG = 6,
/* Floating point control register. */
FCRREG = 7,
PCREL = 8,
CONDMASK = 9,
/* Extended register. */
XREG = 10,
/* Decimal. */
DEC = 11
};
/* Hashing specification. */
#define HASHVAL 79
/* Structure templates. */
typedef struct
{
unsigned int offset;
unsigned int width;
enum operand_type type;
} OPSPEC;
struct SIM_FLAGS
{
int ltncy, /* latency (max number of clocks needed to execute). */
extime, /* execution time (min number of clocks needed to execute). */
wb_pri; /* writeback slot priority. */
unsigned op:OP, /* simulator version of opcode. */
imm_flags:2, /* 10,16 or 26 bit immediate flags. */
rs1_used:1, /* register source 1 used. */
rs2_used:1, /* register source 2 used. */
rsd_used:1, /* register source/dest used. */
c_flag:1, /* complement. */
u_flag:1, /* upper half word. */
n_flag:1, /* execute next. */
wb_flag:1, /* uses writeback slot. */
dest_64:1, /* double precision dest. */
s1_64:1, /* double precision source 1. */
s2_64:1, /* double precision source 2. */
scale_flag:1; /* register is scaled. */
};
typedef struct INSTRUCTAB {
unsigned int opcode;
char *mnemonic;
OPSPEC op1,op2,op3;
struct SIM_FLAGS flgs;
} INSTAB;
#define NO_OPERAND {0,0,0}
extern const INSTAB instructions[];
/*
* Local Variables:
* fill-column: 131
* End:
*/