862 lines
20 KiB
C
862 lines
20 KiB
C
/* i80960 instruction disassembler for GDB.
|
||
Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "frame.h"
|
||
#include "inferior.h"
|
||
|
||
static FILE *stream; /* Output goes here */
|
||
static void print_addr();
|
||
static void ctrl();
|
||
static void cobr();
|
||
static void reg();
|
||
static int mem();
|
||
static void ea();
|
||
static void dstop();
|
||
static void regop();
|
||
static void invalid();
|
||
static int pinsn();
|
||
static void put_abs();
|
||
|
||
|
||
/* Print the i960 instruction at address 'memaddr' in debugged memory,
|
||
on stream 's'. Returns length of the instruction, in bytes. */
|
||
int
|
||
print_insn( memaddr, s )
|
||
CORE_ADDR memaddr;
|
||
FILE *s;
|
||
{
|
||
unsigned int word1, word2;
|
||
|
||
stream = s;
|
||
word1 = read_memory_integer( memaddr, 4 );
|
||
word2 = read_memory_integer( memaddr+4, 4 );
|
||
return pinsn( memaddr, word1, word2 );
|
||
}
|
||
|
||
|
||
/* Read the i960 instruction at 'memaddr' and return the address of
|
||
the next instruction after that, or 0 if 'memaddr' is not the
|
||
address of a valid instruction. The first word of the instruction
|
||
is stored at 'pword1', and the second word, if any, is stored at
|
||
'pword2'. */
|
||
|
||
CORE_ADDR
|
||
next_insn (memaddr, pword1, pword2)
|
||
unsigned long *pword1, *pword2;
|
||
CORE_ADDR memaddr;
|
||
{
|
||
int len;
|
||
unsigned long buf[2];
|
||
|
||
/* Read the two (potential) words of the instruction at once,
|
||
to eliminate the overhead of two calls to read_memory ().
|
||
TODO: read more instructions at once and cache them. */
|
||
|
||
read_memory (memaddr, buf, sizeof (buf));
|
||
*pword1 = buf[0];
|
||
SWAP_TARGET_AND_HOST (pword1, sizeof (long));
|
||
*pword2 = buf[1];
|
||
SWAP_TARGET_AND_HOST (pword2, sizeof (long));
|
||
|
||
/* Divide instruction set into classes based on high 4 bits of opcode*/
|
||
|
||
switch ((*pword1 >> 28) & 0xf)
|
||
{
|
||
case 0x0:
|
||
case 0x1: /* ctrl */
|
||
|
||
case 0x2:
|
||
case 0x3: /* cobr */
|
||
|
||
case 0x5:
|
||
case 0x6:
|
||
case 0x7: /* reg */
|
||
len = 4;
|
||
break;
|
||
|
||
case 0x8:
|
||
case 0x9:
|
||
case 0xa:
|
||
case 0xb:
|
||
case 0xc:
|
||
len = mem (memaddr, *pword1, *pword2, 1);
|
||
break;
|
||
|
||
default: /* invalid instruction */
|
||
len = 0;
|
||
break;
|
||
}
|
||
|
||
if (len)
|
||
return memaddr + len;
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
#define IN_GDB
|
||
|
||
/*****************************************************************************
|
||
* All code below this point should be identical with that of
|
||
* the disassembler in gdmp960.
|
||
*****************************************************************************/
|
||
|
||
struct tabent {
|
||
char *name;
|
||
char numops;
|
||
};
|
||
|
||
static int
|
||
pinsn( memaddr, word1, word2 )
|
||
unsigned long memaddr;
|
||
unsigned long word1, word2;
|
||
{
|
||
int instr_len;
|
||
|
||
instr_len = 4;
|
||
put_abs( word1, word2 );
|
||
|
||
/* Divide instruction set into classes based on high 4 bits of opcode*/
|
||
|
||
switch ( (word1 >> 28) & 0xf ){
|
||
case 0x0:
|
||
case 0x1:
|
||
ctrl( memaddr, word1, word2 );
|
||
break;
|
||
case 0x2:
|
||
case 0x3:
|
||
cobr( memaddr, word1, word2 );
|
||
break;
|
||
case 0x5:
|
||
case 0x6:
|
||
case 0x7:
|
||
reg( word1 );
|
||
break;
|
||
case 0x8:
|
||
case 0x9:
|
||
case 0xa:
|
||
case 0xb:
|
||
case 0xc:
|
||
instr_len = mem( memaddr, word1, word2, 0 );
|
||
break;
|
||
default:
|
||
/* invalid instruction, print as data word */
|
||
invalid( word1 );
|
||
break;
|
||
}
|
||
return instr_len;
|
||
}
|
||
|
||
/****************************************/
|
||
/* CTRL format */
|
||
/****************************************/
|
||
static void
|
||
ctrl( memaddr, word1, word2 )
|
||
unsigned long memaddr;
|
||
unsigned long word1, word2;
|
||
{
|
||
int i;
|
||
static struct tabent ctrl_tab[] = {
|
||
NULL, 0, /* 0x00 */
|
||
NULL, 0, /* 0x01 */
|
||
NULL, 0, /* 0x02 */
|
||
NULL, 0, /* 0x03 */
|
||
NULL, 0, /* 0x04 */
|
||
NULL, 0, /* 0x05 */
|
||
NULL, 0, /* 0x06 */
|
||
NULL, 0, /* 0x07 */
|
||
"b", 1, /* 0x08 */
|
||
"call", 1, /* 0x09 */
|
||
"ret", 0, /* 0x0a */
|
||
"bal", 1, /* 0x0b */
|
||
NULL, 0, /* 0x0c */
|
||
NULL, 0, /* 0x0d */
|
||
NULL, 0, /* 0x0e */
|
||
NULL, 0, /* 0x0f */
|
||
"bno", 1, /* 0x10 */
|
||
"bg", 1, /* 0x11 */
|
||
"be", 1, /* 0x12 */
|
||
"bge", 1, /* 0x13 */
|
||
"bl", 1, /* 0x14 */
|
||
"bne", 1, /* 0x15 */
|
||
"ble", 1, /* 0x16 */
|
||
"bo", 1, /* 0x17 */
|
||
"faultno", 0, /* 0x18 */
|
||
"faultg", 0, /* 0x19 */
|
||
"faulte", 0, /* 0x1a */
|
||
"faultge", 0, /* 0x1b */
|
||
"faultl", 0, /* 0x1c */
|
||
"faultne", 0, /* 0x1d */
|
||
"faultle", 0, /* 0x1e */
|
||
"faulto", 0, /* 0x1f */
|
||
};
|
||
|
||
i = (word1 >> 24) & 0xff;
|
||
if ( (ctrl_tab[i].name == NULL) || ((word1 & 1) != 0) ){
|
||
invalid( word1 );
|
||
return;
|
||
}
|
||
|
||
fputs_filtered( ctrl_tab[i].name, stream );
|
||
if ( word1 & 2 ){ /* Predicts branch not taken */
|
||
fputs_filtered ( ".f", stream );
|
||
}
|
||
|
||
if ( ctrl_tab[i].numops == 1 ){
|
||
/* EXTRACT DISPLACEMENT AND CONVERT TO ADDRESS */
|
||
word1 &= 0x00ffffff;
|
||
if ( word1 & 0x00800000 ){ /* Sign bit is set */
|
||
word1 |= (-1 & ~0xffffff); /* Sign extend */
|
||
}
|
||
fputs_filtered ( "\t", stream );
|
||
print_addr( word1 + memaddr );
|
||
}
|
||
}
|
||
|
||
/****************************************/
|
||
/* COBR format */
|
||
/****************************************/
|
||
static void
|
||
cobr( memaddr, word1, word2 )
|
||
unsigned long memaddr;
|
||
unsigned long word1, word2;
|
||
{
|
||
int src1;
|
||
int src2;
|
||
int i;
|
||
|
||
static struct tabent cobr_tab[] = {
|
||
"testno", 1, /* 0x20 */
|
||
"testg", 1, /* 0x21 */
|
||
"teste", 1, /* 0x22 */
|
||
"testge", 1, /* 0x23 */
|
||
"testl", 1, /* 0x24 */
|
||
"testne", 1, /* 0x25 */
|
||
"testle", 1, /* 0x26 */
|
||
"testo", 1, /* 0x27 */
|
||
NULL, 0, /* 0x28 */
|
||
NULL, 0, /* 0x29 */
|
||
NULL, 0, /* 0x2a */
|
||
NULL, 0, /* 0x2b */
|
||
NULL, 0, /* 0x2c */
|
||
NULL, 0, /* 0x2d */
|
||
NULL, 0, /* 0x2e */
|
||
NULL, 0, /* 0x2f */
|
||
"bbc", 3, /* 0x30 */
|
||
"cmpobg", 3, /* 0x31 */
|
||
"cmpobe", 3, /* 0x32 */
|
||
"cmpobge", 3, /* 0x33 */
|
||
"cmpobl", 3, /* 0x34 */
|
||
"cmpobne", 3, /* 0x35 */
|
||
"cmpoble", 3, /* 0x36 */
|
||
"bbs", 3, /* 0x37 */
|
||
"cmpibno", 3, /* 0x38 */
|
||
"cmpibg", 3, /* 0x39 */
|
||
"cmpibe", 3, /* 0x3a */
|
||
"cmpibge", 3, /* 0x3b */
|
||
"cmpibl", 3, /* 0x3c */
|
||
"cmpibne", 3, /* 0x3d */
|
||
"cmpible", 3, /* 0x3e */
|
||
"cmpibo", 3, /* 0x3f */
|
||
};
|
||
|
||
i = ((word1 >> 24) & 0xff) - 0x20;
|
||
if ( cobr_tab[i].name == NULL ){
|
||
invalid( word1 );
|
||
return;
|
||
}
|
||
|
||
fputs( cobr_tab[i].name, stream );
|
||
if ( word1 & 2 ){ /* Predicts branch not taken */
|
||
fputs_filtered ( ".f", stream );
|
||
}
|
||
fputs_filtered ( "\t", stream );
|
||
|
||
src1 = (word1 >> 19) & 0x1f;
|
||
src2 = (word1 >> 14) & 0x1f;
|
||
|
||
if ( word1 & 0x02000 ){ /* M1 is 1 */
|
||
fprintf_filtered ( stream, "%d", src1 );
|
||
} else { /* M1 is 0 */
|
||
fputs_filtered ( reg_names[src1], stream );
|
||
}
|
||
|
||
if ( cobr_tab[i].numops > 1 ){
|
||
if ( word1 & 1 ){ /* S2 is 1 */
|
||
fprintf_filtered ( stream, ",sf%d,", src2 );
|
||
} else { /* S1 is 0 */
|
||
fprintf_filtered ( stream, ",%s,", reg_names[src2] );
|
||
}
|
||
|
||
/* Extract displacement and convert to address
|
||
*/
|
||
word1 &= 0x00001ffc;
|
||
if ( word1 & 0x00001000 ){ /* Negative displacement */
|
||
word1 |= (-1 & ~0x1fff); /* Sign extend */
|
||
}
|
||
print_addr( memaddr + word1 );
|
||
}
|
||
}
|
||
|
||
/****************************************/
|
||
/* MEM format */
|
||
/****************************************/
|
||
static int /* returns instruction length: 4 or 8 */
|
||
mem( memaddr, word1, word2, noprint )
|
||
unsigned long memaddr;
|
||
unsigned long word1, word2;
|
||
int noprint; /* If TRUE, return instruction length, but
|
||
don't output any text. */
|
||
{
|
||
int i, j;
|
||
int len;
|
||
int mode;
|
||
int offset;
|
||
const char *reg1, *reg2, *reg3;
|
||
|
||
/* This lookup table is too sparse to make it worth typing in, but not
|
||
* so large as to make a sparse array necessary. We allocate the
|
||
* table at runtime, initialize all entries to empty, and copy the
|
||
* real ones in from an initialization table.
|
||
*
|
||
* NOTE: In this table, the meaning of 'numops' is:
|
||
* 1: single operand
|
||
* 2: 2 operands, load instruction
|
||
* -2: 2 operands, store instruction
|
||
*/
|
||
static struct tabent *mem_tab = NULL;
|
||
/* Opcodes of 0x8X, 9X, aX, bX, and cX must be in the table. */
|
||
#define MEM_MIN 0x80
|
||
#define MEM_MAX 0xcf
|
||
#define MEM_SIZ ((MEM_MAX-MEM_MIN+1) * sizeof(struct tabent))
|
||
|
||
static struct { int opcode; char *name; char numops; } mem_init[] = {
|
||
0x80, "ldob", 2,
|
||
0x82, "stob", -2,
|
||
0x84, "bx", 1,
|
||
0x85, "balx", 2,
|
||
0x86, "callx", 1,
|
||
0x88, "ldos", 2,
|
||
0x8a, "stos", -2,
|
||
0x8c, "lda", 2,
|
||
0x90, "ld", 2,
|
||
0x92, "st", -2,
|
||
0x98, "ldl", 2,
|
||
0x9a, "stl", -2,
|
||
0xa0, "ldt", 2,
|
||
0xa2, "stt", -2,
|
||
0xb0, "ldq", 2,
|
||
0xb2, "stq", -2,
|
||
0xc0, "ldib", 2,
|
||
0xc2, "stib", -2,
|
||
0xc8, "ldis", 2,
|
||
0xca, "stis", -2,
|
||
0, NULL, 0
|
||
};
|
||
|
||
if ( mem_tab == NULL ){
|
||
mem_tab = (struct tabent *) xmalloc( MEM_SIZ );
|
||
bzero( mem_tab, MEM_SIZ );
|
||
for ( i = 0; mem_init[i].opcode != 0; i++ ){
|
||
j = mem_init[i].opcode - MEM_MIN;
|
||
mem_tab[j].name = mem_init[i].name;
|
||
mem_tab[j].numops = mem_init[i].numops;
|
||
}
|
||
}
|
||
|
||
i = ((word1 >> 24) & 0xff) - MEM_MIN;
|
||
mode = (word1 >> 10) & 0xf;
|
||
|
||
if ( (mem_tab[i].name != NULL) /* Valid instruction */
|
||
&& ((mode == 5) || (mode >=12)) ){ /* With 32-bit displacement */
|
||
len = 8;
|
||
} else {
|
||
len = 4;
|
||
}
|
||
|
||
if ( noprint ){
|
||
return len;
|
||
}
|
||
|
||
if ( (mem_tab[i].name == NULL) || (mode == 6) ){
|
||
invalid( word1 );
|
||
return len;
|
||
}
|
||
|
||
fprintf_filtered ( stream, "%s\t", mem_tab[i].name );
|
||
|
||
reg1 = reg_names[ (word1 >> 19) & 0x1f ]; /* MEMB only */
|
||
reg2 = reg_names[ (word1 >> 14) & 0x1f ];
|
||
reg3 = reg_names[ word1 & 0x1f ]; /* MEMB only */
|
||
offset = word1 & 0xfff; /* MEMA only */
|
||
|
||
switch ( mem_tab[i].numops ){
|
||
|
||
case 2: /* LOAD INSTRUCTION */
|
||
if ( mode & 4 ){ /* MEMB FORMAT */
|
||
ea( memaddr, mode, reg2, reg3, word1, word2 );
|
||
fprintf_filtered ( stream, ",%s", reg1 );
|
||
} else { /* MEMA FORMAT */
|
||
fprintf( stream, "0x%x", offset );
|
||
if (mode & 8) {
|
||
fprintf_filtered ( stream, "(%s)", reg2 );
|
||
}
|
||
fprintf_filtered ( stream, ",%s", reg1 );
|
||
}
|
||
break;
|
||
|
||
case -2: /* STORE INSTRUCTION */
|
||
if ( mode & 4 ){ /* MEMB FORMAT */
|
||
fprintf_filtered ( stream, "%s,", reg1 );
|
||
ea( memaddr, mode, reg2, reg3, word1, word2 );
|
||
} else { /* MEMA FORMAT */
|
||
fprintf_filtered ( stream, "%s,0x%x", reg1, offset );
|
||
if (mode & 8) {
|
||
fprintf_filtered ( stream, "(%s)", reg2 );
|
||
}
|
||
}
|
||
break;
|
||
|
||
case 1: /* BX/CALLX INSTRUCTION */
|
||
if ( mode & 4 ){ /* MEMB FORMAT */
|
||
ea( memaddr, mode, reg2, reg3, word1, word2 );
|
||
} else { /* MEMA FORMAT */
|
||
fprintf_filtered ( stream, "0x%x", offset );
|
||
if (mode & 8) {
|
||
fprintf_filtered( stream, "(%s)", reg2 );
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
return len;
|
||
}
|
||
|
||
/****************************************/
|
||
/* REG format */
|
||
/****************************************/
|
||
static void
|
||
reg( word1 )
|
||
unsigned long word1;
|
||
{
|
||
int i, j;
|
||
int opcode;
|
||
int fp;
|
||
int m1, m2, m3;
|
||
int s1, s2;
|
||
int src, src2, dst;
|
||
char *mnemp;
|
||
|
||
/* This lookup table is too sparse to make it worth typing in, but not
|
||
* so large as to make a sparse array necessary. We allocate the
|
||
* table at runtime, initialize all entries to empty, and copy the
|
||
* real ones in from an initialization table.
|
||
*
|
||
* NOTE: In this table, the meaning of 'numops' is:
|
||
* 1: single operand, which is NOT a destination.
|
||
* -1: single operand, which IS a destination.
|
||
* 2: 2 operands, the 2nd of which is NOT a destination.
|
||
* -2: 2 operands, the 2nd of which IS a destination.
|
||
* 3: 3 operands
|
||
*
|
||
* If an opcode mnemonic begins with "F", it is a floating-point
|
||
* opcode (the "F" is not printed).
|
||
*/
|
||
|
||
static struct tabent *reg_tab = NULL;
|
||
static struct { int opcode; char *name; char numops; } reg_init[] = {
|
||
#define REG_MIN 0x580
|
||
0x580, "notbit", 3,
|
||
0x581, "and", 3,
|
||
0x582, "andnot", 3,
|
||
0x583, "setbit", 3,
|
||
0x584, "notand", 3,
|
||
0x586, "xor", 3,
|
||
0x587, "or", 3,
|
||
0x588, "nor", 3,
|
||
0x589, "xnor", 3,
|
||
0x58a, "not", -2,
|
||
0x58b, "ornot", 3,
|
||
0x58c, "clrbit", 3,
|
||
0x58d, "notor", 3,
|
||
0x58e, "nand", 3,
|
||
0x58f, "alterbit", 3,
|
||
0x590, "addo", 3,
|
||
0x591, "addi", 3,
|
||
0x592, "subo", 3,
|
||
0x593, "subi", 3,
|
||
0x598, "shro", 3,
|
||
0x59a, "shrdi", 3,
|
||
0x59b, "shri", 3,
|
||
0x59c, "shlo", 3,
|
||
0x59d, "rotate", 3,
|
||
0x59e, "shli", 3,
|
||
0x5a0, "cmpo", 2,
|
||
0x5a1, "cmpi", 2,
|
||
0x5a2, "concmpo", 2,
|
||
0x5a3, "concmpi", 2,
|
||
0x5a4, "cmpinco", 3,
|
||
0x5a5, "cmpinci", 3,
|
||
0x5a6, "cmpdeco", 3,
|
||
0x5a7, "cmpdeci", 3,
|
||
0x5ac, "scanbyte", 2,
|
||
0x5ae, "chkbit", 2,
|
||
0x5b0, "addc", 3,
|
||
0x5b2, "subc", 3,
|
||
0x5cc, "mov", -2,
|
||
0x5d8, "eshro", 3,
|
||
0x5dc, "movl", -2,
|
||
0x5ec, "movt", -2,
|
||
0x5fc, "movq", -2,
|
||
0x600, "synmov", 2,
|
||
0x601, "synmovl", 2,
|
||
0x602, "synmovq", 2,
|
||
0x603, "cmpstr", 3,
|
||
0x604, "movqstr", 3,
|
||
0x605, "movstr", 3,
|
||
0x610, "atmod", 3,
|
||
0x612, "atadd", 3,
|
||
0x613, "inspacc", -2,
|
||
0x614, "ldphy", -2,
|
||
0x615, "synld", -2,
|
||
0x617, "fill", 3,
|
||
0x630, "sdma", 3,
|
||
0x631, "udma", 0,
|
||
0x640, "spanbit", -2,
|
||
0x641, "scanbit", -2,
|
||
0x642, "daddc", 3,
|
||
0x643, "dsubc", 3,
|
||
0x644, "dmovt", -2,
|
||
0x645, "modac", 3,
|
||
0x646, "condrec", -2,
|
||
0x650, "modify", 3,
|
||
0x651, "extract", 3,
|
||
0x654, "modtc", 3,
|
||
0x655, "modpc", 3,
|
||
0x656, "receive", -2,
|
||
0x659, "sysctl", 3,
|
||
0x660, "calls", 1,
|
||
0x662, "send", 3,
|
||
0x663, "sendserv", 1,
|
||
0x664, "resumprcs", 1,
|
||
0x665, "schedprcs", 1,
|
||
0x666, "saveprcs", 0,
|
||
0x668, "condwait", 1,
|
||
0x669, "wait", 1,
|
||
0x66a, "signal", 1,
|
||
0x66b, "mark", 0,
|
||
0x66c, "fmark", 0,
|
||
0x66d, "flushreg", 0,
|
||
0x66f, "syncf", 0,
|
||
0x670, "emul", 3,
|
||
0x671, "ediv", 3,
|
||
0x673, "ldtime", -1,
|
||
0x674, "Fcvtir", -2,
|
||
0x675, "Fcvtilr", -2,
|
||
0x676, "Fscalerl", 3,
|
||
0x677, "Fscaler", 3,
|
||
0x680, "Fatanr", 3,
|
||
0x681, "Flogepr", 3,
|
||
0x682, "Flogr", 3,
|
||
0x683, "Fremr", 3,
|
||
0x684, "Fcmpor", 2,
|
||
0x685, "Fcmpr", 2,
|
||
0x688, "Fsqrtr", -2,
|
||
0x689, "Fexpr", -2,
|
||
0x68a, "Flogbnr", -2,
|
||
0x68b, "Froundr", -2,
|
||
0x68c, "Fsinr", -2,
|
||
0x68d, "Fcosr", -2,
|
||
0x68e, "Ftanr", -2,
|
||
0x68f, "Fclassr", 1,
|
||
0x690, "Fatanrl", 3,
|
||
0x691, "Flogeprl", 3,
|
||
0x692, "Flogrl", 3,
|
||
0x693, "Fremrl", 3,
|
||
0x694, "Fcmporl", 2,
|
||
0x695, "Fcmprl", 2,
|
||
0x698, "Fsqrtrl", -2,
|
||
0x699, "Fexprl", -2,
|
||
0x69a, "Flogbnrl", -2,
|
||
0x69b, "Froundrl", -2,
|
||
0x69c, "Fsinrl", -2,
|
||
0x69d, "Fcosrl", -2,
|
||
0x69e, "Ftanrl", -2,
|
||
0x69f, "Fclassrl", 1,
|
||
0x6c0, "Fcvtri", -2,
|
||
0x6c1, "Fcvtril", -2,
|
||
0x6c2, "Fcvtzri", -2,
|
||
0x6c3, "Fcvtzril", -2,
|
||
0x6c9, "Fmovr", -2,
|
||
0x6d9, "Fmovrl", -2,
|
||
0x6e1, "Fmovre", -2,
|
||
0x6e2, "Fcpysre", 3,
|
||
0x6e3, "Fcpyrsre", 3,
|
||
0x701, "mulo", 3,
|
||
0x708, "remo", 3,
|
||
0x70b, "divo", 3,
|
||
0x741, "muli", 3,
|
||
0x748, "remi", 3,
|
||
0x749, "modi", 3,
|
||
0x74b, "divi", 3,
|
||
0x78b, "Fdivr", 3,
|
||
0x78c, "Fmulr", 3,
|
||
0x78d, "Fsubr", 3,
|
||
0x78f, "Faddr", 3,
|
||
0x79b, "Fdivrl", 3,
|
||
0x79c, "Fmulrl", 3,
|
||
0x79d, "Fsubrl", 3,
|
||
0x79f, "Faddrl", 3,
|
||
#define REG_MAX 0x79f
|
||
#define REG_SIZ ((REG_MAX-REG_MIN+1) * sizeof(struct tabent))
|
||
0, NULL, 0
|
||
};
|
||
|
||
if ( reg_tab == NULL ){
|
||
reg_tab = (struct tabent *) xmalloc( REG_SIZ );
|
||
bzero( reg_tab, REG_SIZ );
|
||
for ( i = 0; reg_init[i].opcode != 0; i++ ){
|
||
j = reg_init[i].opcode - REG_MIN;
|
||
reg_tab[j].name = reg_init[i].name;
|
||
reg_tab[j].numops = reg_init[i].numops;
|
||
}
|
||
}
|
||
|
||
opcode = ((word1 >> 20) & 0xff0) | ((word1 >> 7) & 0xf);
|
||
i = opcode - REG_MIN;
|
||
|
||
if ( (opcode<REG_MIN) || (opcode>REG_MAX) || (reg_tab[i].name==NULL) ){
|
||
invalid( word1 );
|
||
return;
|
||
}
|
||
|
||
mnemp = reg_tab[i].name;
|
||
if ( *mnemp == 'F' ){
|
||
fp = 1;
|
||
mnemp++;
|
||
} else {
|
||
fp = 0;
|
||
}
|
||
|
||
fputs_filtered( mnemp, stream );
|
||
|
||
s1 = (word1 >> 5) & 1;
|
||
s2 = (word1 >> 6) & 1;
|
||
m1 = (word1 >> 11) & 1;
|
||
m2 = (word1 >> 12) & 1;
|
||
m3 = (word1 >> 13) & 1;
|
||
src = word1 & 0x1f;
|
||
src2 = (word1 >> 14) & 0x1f;
|
||
dst = (word1 >> 19) & 0x1f;
|
||
|
||
if ( reg_tab[i].numops != 0 ){
|
||
fputs_filtered( "\t", stream );
|
||
|
||
switch ( reg_tab[i].numops ){
|
||
case 1:
|
||
regop( m1, s1, src, fp );
|
||
break;
|
||
case -1:
|
||
dstop( m3, dst, fp );
|
||
break;
|
||
case 2:
|
||
regop( m1, s1, src, fp );
|
||
fputs_filtered( ",", stream );
|
||
regop( m2, s2, src2, fp );
|
||
break;
|
||
case -2:
|
||
regop( m1, s1, src, fp );
|
||
fputs_filtered( ",", stream );
|
||
dstop( m3, dst, fp );
|
||
break;
|
||
case 3:
|
||
regop( m1, s1, src, fp );
|
||
fputs_filtered( ",", stream );
|
||
regop( m2, s2, src2, fp );
|
||
fputs_filtered( ",", stream );
|
||
dstop( m3, dst, fp );
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/*
|
||
* Print out effective address for memb instructions.
|
||
*/
|
||
static void
|
||
ea( memaddr, mode, reg2, reg3, word1, word2 )
|
||
unsigned long memaddr;
|
||
int mode;
|
||
char *reg2, *reg3;
|
||
unsigned int word2;
|
||
{
|
||
int scale;
|
||
static int scale_tab[] = { 1, 2, 4, 8, 16 };
|
||
|
||
scale = (word1 >> 7) & 0x07;
|
||
if ( (scale > 4) || ((word1 >> 5) & 0x03 != 0) ){
|
||
invalid( word1 );
|
||
return;
|
||
}
|
||
scale = scale_tab[scale];
|
||
|
||
switch (mode) {
|
||
case 4: /* (reg) */
|
||
fprintf_filtered( stream, "(%s)", reg2 );
|
||
break;
|
||
case 5: /* displ+8(ip) */
|
||
print_addr( word2+8+memaddr );
|
||
break;
|
||
case 7: /* (reg)[index*scale] */
|
||
if (scale == 1) {
|
||
fprintf_filtered( stream, "(%s)[%s]", reg2, reg3 );
|
||
} else {
|
||
fprintf_filtered( stream, "(%s)[%s*%d]",reg2,reg3,scale);
|
||
}
|
||
break;
|
||
case 12: /* displacement */
|
||
print_addr( word2 );
|
||
break;
|
||
case 13: /* displ(reg) */
|
||
print_addr( word2 );
|
||
fprintf_filtered( stream, "(%s)", reg2 );
|
||
break;
|
||
case 14: /* displ[index*scale] */
|
||
print_addr( word2 );
|
||
if (scale == 1) {
|
||
fprintf_filtered( stream, "[%s]", reg3 );
|
||
} else {
|
||
fprintf_filtered( stream, "[%s*%d]", reg3, scale );
|
||
}
|
||
break;
|
||
case 15: /* displ(reg)[index*scale] */
|
||
print_addr( word2 );
|
||
if (scale == 1) {
|
||
fprintf_filtered( stream, "(%s)[%s]", reg2, reg3 );
|
||
} else {
|
||
fprintf_filtered( stream, "(%s)[%s*%d]",reg2,reg3,scale );
|
||
}
|
||
break;
|
||
default:
|
||
invalid( word1 );
|
||
return;
|
||
}
|
||
}
|
||
|
||
|
||
/************************************************/
|
||
/* Register Instruction Operand */
|
||
/************************************************/
|
||
static void
|
||
regop( mode, spec, reg, fp )
|
||
int mode, spec, reg, fp;
|
||
{
|
||
if ( fp ){ /* FLOATING POINT INSTRUCTION */
|
||
if ( mode == 1 ){ /* FP operand */
|
||
switch ( reg ){
|
||
case 0: fputs_filtered( "fp0", stream ); break;
|
||
case 1: fputs_filtered( "fp1", stream ); break;
|
||
case 2: fputs_filtered( "fp2", stream ); break;
|
||
case 3: fputs_filtered( "fp3", stream ); break;
|
||
case 16: fputs_filtered( "0f0.0", stream ); break;
|
||
case 22: fputs_filtered( "0f1.0", stream ); break;
|
||
default: fputs_filtered( "?", stream ); break;
|
||
}
|
||
} else { /* Non-FP register */
|
||
fputs_filtered( reg_names[reg], stream );
|
||
}
|
||
} else { /* NOT FLOATING POINT */
|
||
if ( mode == 1 ){ /* Literal */
|
||
fprintf_filtered( stream, "%d", reg );
|
||
} else { /* Register */
|
||
if ( spec == 0 ){
|
||
fputs_filtered( reg_names[reg], stream );
|
||
} else {
|
||
fprintf_filtered( stream, "sf%d", reg );
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/************************************************/
|
||
/* Register Instruction Destination Operand */
|
||
/************************************************/
|
||
static void
|
||
dstop( mode, reg, fp )
|
||
int mode, reg, fp;
|
||
{
|
||
/* 'dst' operand can't be a literal. On non-FP instructions, register
|
||
* mode is assumed and "m3" acts as if were "s3"; on FP-instructions,
|
||
* sf registers are not allowed so m3 acts normally.
|
||
*/
|
||
if ( fp ){
|
||
regop( mode, 0, reg, fp );
|
||
} else {
|
||
regop( 0, mode, reg, fp );
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
invalid( word1 )
|
||
int word1;
|
||
{
|
||
fprintf_filtered( stream, ".word\t0x%08x", word1 );
|
||
}
|
||
|
||
static void
|
||
print_addr(a)
|
||
{
|
||
print_address (a, stream);
|
||
}
|
||
|
||
static void
|
||
put_abs( word1, word2 )
|
||
unsigned long word1, word2;
|
||
{
|
||
#ifdef IN_GDB
|
||
return;
|
||
#else
|
||
int len;
|
||
|
||
switch ( (word1 >> 28) & 0xf ){
|
||
case 0x8:
|
||
case 0x9:
|
||
case 0xa:
|
||
case 0xb:
|
||
case 0xc:
|
||
/* MEM format instruction */
|
||
len = mem( 0, word1, word2, 1 );
|
||
break;
|
||
default:
|
||
len = 4;
|
||
break;
|
||
}
|
||
|
||
if ( len == 8 ){
|
||
fprintf_filtered( stream, "%08x %08x\t", word1, word2 );
|
||
} else {
|
||
fprintf_filtered( stream, "%08x \t", word1 );
|
||
}
|
||
;
|
||
|
||
#endif
|
||
}
|