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/* Print TI TMS320C80 (MVP) instructions
Copyright 1996 Free Software Foundation, Inc.
This file 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 <stdio.h>
#include "ansidecl.h"
#include "opcode/tic80.h"
#include "dis-asm.h"
int
print_insn_tic80 (memaddr, info)
bfd_vma memaddr;
struct disassemble_info *info;
{
bfd_byte buffer[4];
int status;
unsigned long insn[2];
const struct tic80_opcode *opcode;
const struct tic80_opcode *opcode_end;
const unsigned char *opindex;
const struct tic80_operand *operand;
int need_comma;
int need_paren;
int length = 4;
status = (*info->read_memory_func) (memaddr, buffer, 4, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
if (info -> endian == BFD_ENDIAN_LITTLE)
{
insn[0] = bfd_getl32 (buffer);
}
else if (info -> endian == BFD_ENDIAN_BIG)
{
insn[0] = bfd_getb32 (buffer);
}
else
{
/* FIXME: Should probably just default to one or the other */
abort ();
}
/* Find the first opcode match in the opcodes table. FIXME: there should
be faster ways to find one (hash table or binary search), but don't
worry too much about it until other TIc80 support is finished. */
opcode_end = tic80_opcodes + tic80_num_opcodes;
for (opcode = tic80_opcodes; opcode < opcode_end; opcode++)
{
if ((insn[0] & opcode -> mask) == opcode -> opcode)
{
break;
}
}
if (opcode == opcode_end)
{
/* No match found, just print the bits as a .word directive */
(*info -> fprintf_func) (info -> stream, ".word %#08lx", insn[0]);
}
else
{
/* Match found, decode the instruction. */
(*info -> fprintf_func) (info -> stream, "%s", opcode -> name);
/* Now extract and print the operands. */
need_comma = 0;
need_paren = 0;
if (opcode -> operands[0] != 0)
{
(*info -> fprintf_func) (info -> stream, "\t");
}
for (opindex = opcode -> operands; *opindex != 0; opindex++)
{
long value;
operand = tic80_operands + *opindex;
/* Extract the value from the instruction. */
if (operand -> extract)
{
value = (*operand -> extract) (insn[0], (int *) NULL);
}
else if (operand -> bits == 32)
{
status = (*info->read_memory_func) (memaddr + 4, buffer, 4, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
if (info -> endian == BFD_ENDIAN_LITTLE)
{
insn[1] = bfd_getl32 (buffer);
}
else if (info -> endian == BFD_ENDIAN_BIG)
{
insn[1] = bfd_getb32 (buffer);
}
value = (long) insn[1];
length += 4;
}
else
{
value = (insn[0] >> operand -> shift) & ((1 << operand -> bits) - 1);
if ((operand -> flags & TIC80_OPERAND_SIGNED) != 0
&& (value & (1 << (operand -> bits - 1))) != 0)
value -= 1 << operand -> bits;
}
if (need_comma)
{
(*info -> fprintf_func) (info -> stream, ",");
need_comma = 0;
}
/* Print the operand as directed by the flags. */
if ((operand -> flags & TIC80_OPERAND_GPR) != 0)
{
(*info -> fprintf_func) (info -> stream, "r%ld", value);
}
else if ((operand -> flags & TIC80_OPERAND_FPA) != 0)
{
(*info -> fprintf_func) (info -> stream, "a%ld", value);
}
else if ((operand -> flags & TIC80_OPERAND_RELATIVE) != 0)
{
(*info -> print_address_func) (memaddr + value, info);
}
else if ((operand -> flags & TIC80_OPERAND_CC_SZ) != 0)
{
#if 0 /* FIXME */
if (operand -> bits == 3)
(*info -> fprintf_func) (info -> stream, "cr%d", value);
else
{
static const char *cbnames[4] = { "lt", "gt", "eq", "so" };
int cr;
int cc;
cr = value >> 2;
if (cr != 0)
(*info -> fprintf_func) (info -> stream, "4*cr%d", cr);
cc = value & 3;
if (cc != 0)
{
if (cr != 0)
(*info -> fprintf_func) (info -> stream, "+");
(*info -> fprintf_func) (info -> stream, "%s", cbnames[cc]);
}
}
#endif
}
else
{
if ((value > 999 || value < -999)
|| operand -> flags & TIC80_OPERAND_BITFIELD)
{
(*info -> fprintf_func) (info -> stream, "%#lx", value);
}
else
{
(*info -> fprintf_func) (info -> stream, "%ld", value);
}
}
if (need_paren)
{
(*info -> fprintf_func) (info -> stream, ")");
need_paren = 0;
}
if ((operand -> flags & TIC80_OPERAND_PARENS) == 0)
{
need_comma = 1;
}
else
{
(*info -> fprintf_func) (info -> stream, "(");
need_paren = 1;
}
}
}
return (length);
}
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