4.4BSD/usr/src/contrib/gdb-4.7.lbl/gdb/hppa-pinsn.c
/* Disassembler for the PA-RISC. Somewhat derived from sparc-pinsn.c.
Copyright 1989, 1990, 1992 Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
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 "symtab.h"
#include "opcode/hppa.h"
char *control_reg[] = {"rctr", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7",
"pidr1", "pidr2", "ccr", "sar", "pidr3", "pidr4",
"iva", "eiem", "itmr", "pcsq", "pcoq", "iir", "isr",
"ior", "ipsw", "eirr", "tr0", "tr1", "tr2", "tr3",
"tr4", "tr5", "tr6", "tr7"
};
char *compare_cond_names[] = {"", ",=", ",<", ",<=", ",<<", ",<<=", ",sv",
",od", ",tr", ",<>", ",>=", ",>", ",>>=",
",>>", ",nsv", ",ev"
};
char *add_cond_names[] = {"", ",=", ",<", ",<=", ",nuv", ",znv", ",sv",
",od", ",tr", ",<>", ",>=", ",>", ",uv",
",vnz", ",nsv", ",ev"
};
char *logical_cond_names[] = {"", ",=", ",<", ",<=", 0, 0, 0, ",od",
",tr", ",<>", ",>=", ",>", 0, 0, 0, ",ev"};
char *unit_cond_names[] = {"", 0, ",sbz", ",shz", ",sdc", 0, ",sbc", ",shc",
",tr", 0, ",nbz", ",nhz", ",ndc", 0, ",nbc", ",nhc"
};
char *shift_cond_names[] = {"", ",=", ",<", ",od", ",tr", ",<>", ",>=", ",ev"};
char *index_compl_names[] = {"", ",m", ",s", ",sm"};
char *short_ldst_compl_names[] = {"", ",ma", "", ",mb"};
char *short_bytes_compl_names[] = {"", ",b,m", ",e", ",e,m"};
char *float_format_names[] = {",sgl", ",dbl", ",quad"};
char *float_comp_names[] =
{",false?", ",false", ",?", ",!<=>", ",=", ",=t", ",?=", ",!<>",
",!?>=", ",<", ",?<", ",!>=", ",!?>", ",<=", ",?<=", ",!>",
",!?<=", ",>", ",?>", ",!<=", ",!?<", ",>=", ",?>=", ",!<",
",!?=", ",<>", ",!=", ",!=t", ",!?", ",<=>", ",true?", ",true"
};
/* For a bunch of different instructions form an index into a
completer name table. */
#define GET_COMPL(insn) (GET_FIELD (insn, 26, 26) | \
GET_FIELD (insn, 18, 18) << 1)
#define GET_COND(insn) (GET_FIELD ((insn), 16, 18) + \
(GET_FIELD ((insn), 19, 19) ? 8 : 0))
void fput_reg (), fput_const ();
/* Print one instruction from MEMADDR on STREAM. */
int
print_insn (memaddr, stream)
CORE_ADDR memaddr;
FILE *stream;
{
unsigned int insn, i, op;
read_memory (memaddr, &insn, sizeof (insn));
for (i = 0; i < NUMOPCODES; ++i)
{
const struct pa_opcode *opcode = &pa_opcodes[i];
if ((insn & opcode->mask) == opcode->match)
{
register const char *s;
fputs_filtered (opcode->name, stream);
if (!index ("cCY<?!@-+&U>~nZFM", opcode->args[0]))
fputs_filtered (" ", stream);
for (s = opcode->args; *s != '\0'; ++s)
{
switch (*s)
{
case 'x':
fput_reg (GET_FIELD (insn, 11, 15), stream);
break;
case 'X':
if (GET_FIELD (insn, 25, 25))
fput_reg_r (GET_FIELD (insn, 11, 15), stream);
else
fput_reg (GET_FIELD (insn, 11, 15), stream);
break;
case 'b':
fput_reg (GET_FIELD (insn, 6, 10), stream);
break;
case '^':
fput_creg (GET_FIELD (insn, 6, 10), stream);
break;
case 'E':
if (GET_FIELD (insn, 25, 25))
fput_reg_r (GET_FIELD (insn, 6, 10), stream);
else
fput_reg (GET_FIELD (insn, 6, 10), stream);
break;
case 't':
fput_reg (GET_FIELD (insn, 27, 31), stream);
break;
case 'v':
if (GET_FIELD (insn, 25, 25))
fput_reg_r (GET_FIELD (insn, 27, 31), stream);
else
fput_reg (GET_FIELD (insn, 27, 31), stream);
break;
case '4':
fput_creg (GET_FIELD (insn, 6, 10), stream);
break;
case '6':
fput_reg (GET_FIELD (insn, 11, 15), stream);
break;
case '7':
fput_reg (GET_FIELD (insn, 27, 31), stream);
break;
case '8':
fput_reg (GET_FIELD (insn, 16, 20), stream);
break;
case '9':
fput_reg (GET_FIELD (insn, 21, 25), stream);
break;
case '5':
fput_const (extract_5_load (insn), stream);
break;
/* case 's': */
case 'S':
fprintf_filtered (stream, "sr%d", extract_3 (insn));
break;
case 'c':
fprintf_filtered (stream, "%s ",
index_compl_names[GET_COMPL (insn)]);
break;
case 'C':
fprintf_filtered (stream, "%s ",
short_ldst_compl_names[GET_COMPL (insn)]);
break;
case 'Y':
fprintf_filtered (stream, "%s ",
short_bytes_compl_names[GET_COMPL (insn)]);
break;
/* these four conditions are for the set of instructions
which distinguish true/false conditions by opcode rather
than by the 'f' bit (sigh): comb, comib, addb, addib */
case '<':
fputs_filtered (compare_cond_names[GET_FIELD (insn, 16, 18)],
stream);
break;
case '?':
fputs_filtered (compare_cond_names[GET_FIELD (insn, 16, 18) + 8],
stream);
break;
case '!':
fputs_filtered (add_cond_names[GET_FIELD (insn, 16, 18)],
stream);
break;
case '@':
fputs_filtered (add_cond_names[GET_FIELD (insn, 16, 18) + 8],
stream);
break;
case '-':
fprintf_filtered (stream, "%s ",
compare_cond_names[GET_COND (insn)]);
break;
case '+':
fprintf_filtered (stream, "%s ",
add_cond_names[GET_FIELD (insn, 16, 18)]);
break;
case '&':
fprintf_filtered (stream, "%s ",
logical_cond_names[GET_COND (insn)]);
break;
case 'U':
fprintf_filtered (stream, "%s ",
unit_cond_names[GET_COND (insn)]);
break;
case '>':
case '~':
fprintf_filtered (stream, "%s ",
shift_cond_names[GET_FIELD (insn, 16, 18)]);
break;
case 'V':
fput_const (extract_5_store (insn), stream);
break;
case 'i':
fput_const (extract_11 (insn), stream);
break;
case 'j':
fput_const (extract_14 (insn), stream);
break;
case 'k':
fput_const (extract_21 (insn), stream);
break;
case 'n':
if (insn & 0x2)
fprintf_filtered (stream, ",n ");
else
fprintf_filtered (stream, " ");
break;
case 'w':
print_address (memaddr + 8 + extract_12 (insn), stream);
break;
case 'W':
/* don't interpret an address if it's an external branch
instruction. */
op = GET_FIELD (insn, 0, 5);
if (op != 0x38 /* be */ && op != 0x39 /* ble */)
print_address (memaddr + 8 + extract_17 (insn), stream);
else
fput_const (extract_17 (insn), stream);
break;
case 'B':
{
int space;
if (space = GET_FIELD (insn, 16, 17))
fprintf_filtered (stream, "sr%d,", space);
fput_reg (GET_FIELD (insn, 6, 10), stream);
break;
}
case 'p':
fprintf_filtered (stream, "%d",
31 - GET_FIELD (insn, 22, 26));
break;
case 'P':
fprintf_filtered (stream, "%d",
GET_FIELD (insn, 22, 26));
break;
case 'T':
fprintf_filtered (stream, "%d",
32 - GET_FIELD (insn, 27, 31));
break;
case 'A':
fput_const (GET_FIELD (insn, 6, 18), stream);
break;
case 'Z':
if (GET_FIELD (insn, 26, 26))
fprintf_filtered (stream, ",m ");
else
fprintf_filtered (stream, " ");
break;
case 'D':
fput_const (GET_FIELD (insn, 6, 31), stream);
break;
case 'f':
fprintf_filtered (stream, ",%d", GET_FIELD (insn, 23, 25));
break;
case 'O':
fput_const ((GET_FIELD (insn, 6,20) << 5 |
GET_FIELD (insn, 27, 31)), stream);
break;
case 'o':
fput_const (GET_FIELD (insn, 6, 20), stream);
break;
case '2':
fput_const ((GET_FIELD (insn, 6, 22) << 5 |
GET_FIELD (insn, 27, 31)), stream);
break;
case '1':
fput_const ((GET_FIELD (insn, 11, 20) << 5 |
GET_FIELD (insn, 27, 31)), stream);
break;
case '0':
fput_const ((GET_FIELD (insn, 16, 20) << 5 |
GET_FIELD (insn, 27, 31)), stream);
break;
case 'u':
fprintf_filtered (stream, "%d", GET_FIELD (insn, 23, 25));
break;
case 'F':
/* if no destination completer, need a space here */
if (GET_FIELD (insn, 21, 22) == 1)
fputs_filtered (float_format_names[GET_FIELD (insn, 19, 20)],
stream);
else
fprintf_filtered (stream, "%s ",
float_format_names[GET_FIELD
(insn, 19, 20)]);
break;
case 'G':
fprintf_filtered (stream, "%s ",
float_format_names[GET_FIELD (insn,
17, 18)]);
break;
case 'H':
fputs_filtered (float_format_names[GET_FIELD
(insn, 26, 26)], stream);
break;
case 'M':
fputs_filtered (float_comp_names[GET_FIELD (insn, 27, 31)],
stream);
break;
case '}':
fprintf_filtered (stream, "fp%d", GET_FIELD (insn, 6, 10));
break;
case '|':
fprintf_filtered (stream, "fp%d", GET_FIELD (insn, 11, 15));
break;
case '{':
if (GET_FIELD (insn, 23, 25) == 0)
fprintf_filtered (stream, "fp%d",
GET_FIELD (insn, 27, 31));
else
fprintf_filtered (stream, "cp%d",
GET_FIELD (insn, 27, 31));
break;
default:
fprintf_filtered (stream, "%c", *s);
break;
}
}
return sizeof(insn);
}
}
fprintf_filtered (stream, "%#8x", insn);
return sizeof(insn);
}
/* Utility function to print registers */
void
fput_reg (reg, stream)
unsigned reg;
FILE *stream;
{
if (reg)
fputs_filtered (reg_names[reg], stream);
else
fputs_filtered ("r0", stream);
}
void
fput_reg_r (reg, stream)
unsigned reg;
FILE *stream;
{
if (reg)
fputs_filtered (reg_names[reg], stream);
else
fputs_filtered ("r0", stream);
fputs_filtered ("R", stream);
}
void
fput_creg (reg, stream)
unsigned reg;
FILE *stream;
{
fputs_filtered (control_reg[reg], stream);
}
/* print constants with sign */
void
fput_const (num, stream)
unsigned num;
FILE *stream;
{
if ((int)num < 0)
fprintf_filtered (stream, "-%x", -(int)num);
else
fprintf_filtered (stream, "%x", num);
}