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binutils-gdb/opcodes/hppa-dis.c

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/* Disassembler for the PA-RISC. Somewhat derived from sparc-pinsn.c.
Copyright 1989, 1990, 1992, 1993 Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <ansidecl.h>
#include "sysdep.h"
#include "dis-asm.h"
#include "libhppa.h"
#include "opcode/hppa.h"
/* Integer register names, indexed by the numbers which appear in the
opcodes. */
static const char *const reg_names[] =
{"flags", "r1", "rp", "r3", "r4", "r5", "r6", "r7", "r8", "r9",
"r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19",
"r20", "r21", "r22", "r23", "r24", "r25", "r26", "dp", "ret0", "ret1",
"sp", "r31"};
/* Floating point register names, indexed by the numbers which appear in the
opcodes. */
static const char *const fp_reg_names[] =
{"fpsr", "fpe2", "fpe4", "fpe6",
"fr4", "fr5", "fr6", "fr7", "fr8",
"fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15",
"fr16", "fr17", "fr18", "fr19", "fr20", "fr21", "fr22", "fr23",
"fr24", "fr25", "fr26", "fr27", "fr28", "fr29", "fr30", "fr31"};
typedef unsigned int CORE_ADDR;
/* Get at various relevent fields of an instruction word. */
#define MASK_5 0x1f
#define MASK_11 0x7ff
#define MASK_14 0x3fff
#define MASK_21 0x1fffff
/* This macro gets bit fields using HP's numbering (MSB = 0) */
#define GET_FIELD(X, FROM, TO) \
((X) >> (31 - (TO)) & ((1 << ((TO) - (FROM) + 1)) - 1))
/* Some of these have been converted to 2-d arrays because they
consume less storage this way. If the maintenance becomes a
problem, convert them back to const 1-d pointer arrays. */
static const char control_reg[][6] = {
"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"
};
static const char compare_cond_names[][5] = {
"", ",=", ",<", ",<=", ",<<", ",<<=", ",sv",
",od", ",tr", ",<>", ",>=", ",>", ",>>=",
",>>", ",nsv", ",ev"
};
static const char add_cond_names[][5] = {
"", ",=", ",<", ",<=", ",nuv", ",znv", ",sv",
",od", ",tr", ",<>", ",>=", ",>", ",uv",
",vnz", ",nsv", ",ev"
};
static const char *const logical_cond_names[] = {
"", ",=", ",<", ",<=", 0, 0, 0, ",od",
",tr", ",<>", ",>=", ",>", 0, 0, 0, ",ev"};
static const char *const unit_cond_names[] = {
"", 0, ",sbz", ",shz", ",sdc", 0, ",sbc", ",shc",
",tr", 0, ",nbz", ",nhz", ",ndc", 0, ",nbc", ",nhc"
};
static const char shift_cond_names[][4] = {
"", ",=", ",<", ",od", ",tr", ",<>", ",>=", ",ev"
};
static const char index_compl_names[][4] = {"", ",m", ",s", ",sm"};
static const char short_ldst_compl_names[][4] = {"", ",ma", "", ",mb"};
static const char *const short_bytes_compl_names[] = {
"", ",b,m", ",e", ",e,m"
};
static const char *const float_format_names[] = {",sgl", ",dbl", "", ",quad"};
static const char float_comp_names[][8] =
{
",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))
/* Utility function to print registers. Put these first, so gcc's function
inlining can do its stuff. */
#define fputs_filtered(STR,F) (*info->fprintf_func) (info->stream, "%s", STR)
static void
fput_reg (reg, info)
unsigned reg;
disassemble_info *info;
{
(*info->fprintf_func) (info->stream, reg ? reg_names[reg] : "r0");
}
static void
fput_fp_reg (reg, info)
unsigned reg;
disassemble_info *info;
{
(*info->fprintf_func) (info->stream, reg ? fp_reg_names[reg] : "fr0");
}
static void
fput_fp_reg_r (reg, info)
unsigned reg;
disassemble_info *info;
{
/* Special case floating point exception registers. */
if (reg < 4)
(*info->fprintf_func) (info->stream, "fpe%d", reg * 2 + 1);
else
(*info->fprintf_func) (info->stream, "%sR", reg ? fp_reg_names[reg]
: "fr0");
}
static void
fput_creg (reg, info)
unsigned reg;
disassemble_info *info;
{
(*info->fprintf_func) (info->stream, control_reg[reg]);
}
/* print constants with sign */
static void
fput_const (num, info)
unsigned num;
disassemble_info *info;
{
if ((int)num < 0)
(*info->fprintf_func) (info->stream, "-%x", -(int)num);
else
(*info->fprintf_func) (info->stream, "%x", num);
}
/* Routines to extract various sized constants out of hppa
instructions. */
/* extract a 3-bit space register number from a be, ble, mtsp or mfsp */
static int
extract_3 (word)
unsigned word;
{
return GET_FIELD (word, 18, 18) << 2 | GET_FIELD (word, 16, 17);
}
static int
extract_5_load (word)
unsigned word;
{
return low_sign_extend (word >> 16 & MASK_5, 5);
}
/* extract the immediate field from a st{bhw}s instruction */
static int
extract_5_store (word)
unsigned word;
{
return low_sign_extend (word & MASK_5, 5);
}
/* extract the immediate field from a break instruction */
static unsigned
extract_5r_store (word)
unsigned word;
{
return (word & MASK_5);
}
/* extract the immediate field from a {sr}sm instruction */
static unsigned
extract_5R_store (word)
unsigned word;
{
return (word >> 16 & MASK_5);
}
/* extract the immediate field from a bb instruction */
static unsigned
extract_5Q_store (word)
unsigned word;
{
return (word >> 21 & MASK_5);
}
/* extract an 11 bit immediate field */
static int
extract_11 (word)
unsigned word;
{
return low_sign_extend (word & MASK_11, 11);
}
/* extract a 14 bit immediate field */
static int
extract_14 (word)
unsigned word;
{
return low_sign_extend (word & MASK_14, 14);
}
/* extract a 21 bit constant */
static int
extract_21 (word)
unsigned word;
{
int val;
word &= MASK_21;
word <<= 11;
val = GET_FIELD (word, 20, 20);
val <<= 11;
val |= GET_FIELD (word, 9, 19);
val <<= 2;
val |= GET_FIELD (word, 5, 6);
val <<= 5;
val |= GET_FIELD (word, 0, 4);
val <<= 2;
val |= GET_FIELD (word, 7, 8);
return sign_extend (val, 21) << 11;
}
/* extract a 12 bit constant from branch instructions */
static int
extract_12 (word)
unsigned word;
{
return sign_extend (GET_FIELD (word, 19, 28) |
GET_FIELD (word, 29, 29) << 10 |
(word & 0x1) << 11, 12) << 2;
}
/* extract a 17 bit constant from branch instructions, returning the
19 bit signed value. */
static int
extract_17 (word)
unsigned word;
{
return sign_extend (GET_FIELD (word, 19, 28) |
GET_FIELD (word, 29, 29) << 10 |
GET_FIELD (word, 11, 15) << 11 |
(word & 0x1) << 16, 17) << 2;
}
/* Print one instruction. */
int
print_insn_hppa (memaddr, info)
bfd_vma memaddr;
disassemble_info *info;
{
bfd_byte buffer[4];
unsigned int insn, i;
{
int status =
(*info->read_memory_func) (memaddr, buffer, sizeof (buffer), info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
}
insn = bfd_getb32 (buffer);
for (i = 0; i < NUMOPCODES; ++i)
{
const struct pa_opcode *opcode = &pa_opcodes[i];
if ((insn & opcode->mask) == opcode->match)
{
register const char *s;
(*info->fprintf_func) (info->stream, "%s", opcode->name);
if (!strchr ("cfCY<?!@-+&U>~nHNZFIMadu|", opcode->args[0]))
(*info->fprintf_func) (info->stream, " ");
for (s = opcode->args; *s != '\0'; ++s)
{
switch (*s)
{
case 'x':
fput_reg (GET_FIELD (insn, 11, 15), info);
break;
case 'X':
if (GET_FIELD (insn, 25, 25))
fput_fp_reg_r (GET_FIELD (insn, 11, 15), info);
else
fput_fp_reg (GET_FIELD (insn, 11, 15), info);
break;
case 'b':
fput_reg (GET_FIELD (insn, 6, 10), info);
break;
case '^':
fput_creg (GET_FIELD (insn, 6, 10), info);
break;
case 'E':
if (GET_FIELD (insn, 25, 25))
fput_fp_reg_r (GET_FIELD (insn, 6, 10), info);
else
fput_fp_reg (GET_FIELD (insn, 6, 10), info);
break;
case 't':
fput_reg (GET_FIELD (insn, 27, 31), info);
break;
case 'v':
if (GET_FIELD (insn, 25, 25))
fput_fp_reg_r (GET_FIELD (insn, 27, 31), info);
else
fput_fp_reg (GET_FIELD (insn, 27, 31), info);
break;
case 'y':
fput_fp_reg (GET_FIELD (insn, 27, 31), info);
break;
case '4':
{
int reg = GET_FIELD (insn, 6, 10);
reg |= (GET_FIELD (insn, 26, 26) << 4);
fput_fp_reg (reg, info);
break;
}
case '6':
{
int reg = GET_FIELD (insn, 11, 15);
reg |= (GET_FIELD (insn, 26, 26) << 4);
fput_fp_reg (reg, info);
break;
}
case '7':
{
int reg = GET_FIELD (insn, 27, 31);
reg |= (GET_FIELD (insn, 26, 26) << 4);
fput_fp_reg (reg, info);
break;
}
case '8':
{
int reg = GET_FIELD (insn, 16, 20);
reg |= (GET_FIELD (insn, 26, 26) << 4);
fput_fp_reg (reg, info);
break;
}
case '9':
{
int reg = GET_FIELD (insn, 21, 25);
reg |= (GET_FIELD (insn, 26, 26) << 4);
fput_fp_reg (reg, info);
break;
}
case '5':
fput_const (extract_5_load (insn), info);
break;
case 's':
(*info->fprintf_func) (info->stream,
"sr%d", GET_FIELD (insn, 16, 17));
break;
case 'S':
(*info->fprintf_func) (info->stream, "sr%d", extract_3 (insn));
break;
case 'c':
(*info->fprintf_func) (info->stream, "%s ",
index_compl_names[GET_COMPL (insn)]);
break;
case 'C':
(*info->fprintf_func) (info->stream, "%s ",
short_ldst_compl_names[GET_COMPL (insn)]);
break;
case 'Y':
(*info->fprintf_func) (info->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)],
info);
break;
case '?':
fputs_filtered (compare_cond_names[GET_FIELD (insn, 16, 18)
+ GET_FIELD (insn, 4, 4) * 8], info);
break;
case '@':
fputs_filtered (add_cond_names[GET_FIELD (insn, 16, 18)
+ GET_FIELD (insn, 4, 4) * 8], info);
break;
case 'a':
(*info->fprintf_func) (info->stream, "%s ",
compare_cond_names[GET_COND (insn)]);
break;
case 'd':
(*info->fprintf_func) (info->stream, "%s ",
add_cond_names[GET_COND (insn)]);
break;
case '!':
(*info->fprintf_func) (info->stream, "%s",
add_cond_names[GET_FIELD (insn, 16, 18)]);
break;
case '&':
(*info->fprintf_func) (info->stream, "%s ",
logical_cond_names[GET_COND (insn)]);
break;
case 'U':
(*info->fprintf_func) (info->stream, "%s ",
unit_cond_names[GET_COND (insn)]);
break;
case '|':
case '>':
case '~':
(*info->fprintf_func)
(info->stream, "%s",
shift_cond_names[GET_FIELD (insn, 16, 18)]);
/* If the next character in args is 'n', it will handle
putting out the space. */
if (s[1] != 'n')
(*info->fprintf_func) (info->stream, " ");
break;
case 'V':
fput_const (extract_5_store (insn), info);
break;
case 'r':
fput_const (extract_5r_store (insn), info);
break;
case 'R':
fput_const (extract_5R_store (insn), info);
break;
case 'Q':
fput_const (extract_5Q_store (insn), info);
break;
case 'i':
fput_const (extract_11 (insn), info);
break;
case 'j':
fput_const (extract_14 (insn), info);
break;
case 'k':
fput_const (extract_21 (insn), info);
break;
case 'n':
if (insn & 0x2)
(*info->fprintf_func) (info->stream, ",n ");
else
(*info->fprintf_func) (info->stream, " ");
break;
case 'N':
if ((insn & 0x20) && s[1])
(*info->fprintf_func) (info->stream, ",n ");
else if (insn & 0x20)
(*info->fprintf_func) (info->stream, ",n");
else if (s[1])
(*info->fprintf_func) (info->stream, " ");
break;
case 'w':
(*info->print_address_func) (memaddr + 8 + extract_12 (insn),
info);
break;
case 'W':
/* 17 bit PC-relative branch. */
(*info->print_address_func) ((memaddr + 8
+ extract_17 (insn)),
info);
break;
case 'z':
/* 17 bit displacement. This is an offset from a register
so it gets disasssembled as just a number, not any sort
of address. */
fput_const (extract_17 (insn), info);
break;
case 'p':
(*info->fprintf_func) (info->stream, "%d",
31 - GET_FIELD (insn, 22, 26));
break;
case 'P':
(*info->fprintf_func) (info->stream, "%d",
GET_FIELD (insn, 22, 26));
break;
case 'T':
(*info->fprintf_func) (info->stream, "%d",
32 - GET_FIELD (insn, 27, 31));
break;
case 'A':
fput_const (GET_FIELD (insn, 6, 18), info);
break;
case 'Z':
if (GET_FIELD (insn, 26, 26))
(*info->fprintf_func) (info->stream, ",m ");
else
(*info->fprintf_func) (info->stream, " ");
break;
case 'D':
fput_const (GET_FIELD (insn, 6, 31), info);
break;
case 'f':
(*info->fprintf_func) (info->stream, ",%d", GET_FIELD (insn, 23, 25));
break;
case 'O':
fput_const ((GET_FIELD (insn, 6,20) << 5 |
GET_FIELD (insn, 27, 31)), info);
break;
case 'o':
fput_const (GET_FIELD (insn, 6, 20), info);
break;
case '3':
{
int reg = GET_FIELD (insn, 21, 22);
reg |= GET_FIELD (insn, 16, 18) << 2;
if (GET_FIELD (insn, 23, 23) != 0)
fput_fp_reg_r (reg, info);
else
fput_fp_reg (reg, info);
break;
}
case '2':
fput_const ((GET_FIELD (insn, 6, 22) << 5 |
GET_FIELD (insn, 27, 31)), info);
break;
case '1':
fput_const ((GET_FIELD (insn, 11, 20) << 5 |
GET_FIELD (insn, 27, 31)), info);
break;
case '0':
fput_const ((GET_FIELD (insn, 16, 20) << 5 |
GET_FIELD (insn, 27, 31)), info);
break;
case 'u':
(*info->fprintf_func) (info->stream, ",%d", GET_FIELD (insn, 23, 25));
break;
case 'F':
/* if no destination completer and not before a completer
for fcmp, need a space here */
if (GET_FIELD (insn, 21, 22) == 1 || s[1] == 'M')
fputs_filtered (float_format_names[GET_FIELD (insn, 19, 20)],
info);
else
(*info->fprintf_func) (info->stream, "%s ",
float_format_names[GET_FIELD
(insn, 19, 20)]);
break;
case 'G':
(*info->fprintf_func) (info->stream, "%s ",
float_format_names[GET_FIELD (insn,
17, 18)]);
break;
case 'H':
if (GET_FIELD (insn, 26, 26) == 1)
(*info->fprintf_func) (info->stream, "%s ",
float_format_names[0]);
else
(*info->fprintf_func) (info->stream, "%s ",
float_format_names[1]);
break;
case 'I':
/* if no destination completer and not before a completer
for fcmp, need a space here */
if (GET_FIELD (insn, 21, 22) == 1 || s[1] == 'M')
fputs_filtered (float_format_names[GET_FIELD (insn, 20, 20)],
info);
else
(*info->fprintf_func) (info->stream, "%s ",
float_format_names[GET_FIELD
(insn, 20, 20)]);
break;
case 'J':
if (GET_FIELD (insn, 24, 24))
fput_fp_reg_r (GET_FIELD (insn, 6, 10), info);
else
fput_fp_reg (GET_FIELD (insn, 6, 10), info);
break;
case 'K':
if (GET_FIELD (insn, 19, 19))
fput_fp_reg_r (GET_FIELD (insn, 11, 15), info);
else
fput_fp_reg (GET_FIELD (insn, 11, 15), info);
break;
case 'M':
(*info->fprintf_func) (info->stream, "%s ",
float_comp_names[GET_FIELD
(insn, 27, 31)]);
break;
default:
(*info->fprintf_func) (info->stream, "%c", *s);
break;
}
}
return sizeof(insn);
}
}
(*info->fprintf_func) (info->stream, "#%8x", insn);
return sizeof(insn);
}
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