--- /dev/null
+/* Disassemble moxie instructions.
+ Copyright 2009
+ Free Software Foundation, Inc.
+
+ This file is part of the GNU opcodes library.
+
+ This library 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, or (at your option)
+ any later version.
+
+ It 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. */
+
+#include <stdio.h>
+#include "sysdep.h"
+#define STATIC_TABLE
+#define DEFINE_TABLE
+
+#include "opcode/moxie.h"
+#include "dis-asm.h"
+
+static fprintf_ftype fpr;
+static void *stream;
+
+/* Macros to extract operands from the instruction word. */
+#define OP_A(i) ((i >> 4) & 0xf)
+#define OP_B(i) (i & 0xf)
+#define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)
+
+static const char * reg_names[16] =
+ { "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5",
+ "$r6", "$r7", "$r8", "$r9", "$r10", "$r11", "$r12", "$r13" };
+
+int
+print_insn_moxie (bfd_vma addr, struct disassemble_info * info)
+{
+ int length = 2;
+ int status;
+ stream = info->stream;
+ const moxie_opc_info_t * opcode;
+ bfd_byte buffer[4];
+ unsigned short iword;
+ fpr = info->fprintf_func;
+
+ if ((status = info->read_memory_func (addr, buffer, 2, info)))
+ goto fail;
+ iword = bfd_getb16 (buffer);
+
+ /* Form 1 instructions have the high bit set to 0. */
+ if ((iword & (1<<15)) == 0)
+ {
+ /* Extract the Form 1 opcode. */
+ opcode = &moxie_form1_opc_info[iword >> 8];
+ switch (opcode->itype)
+ {
+ case MOXIE_F1_NARG:
+ fpr (stream, "%s", opcode->name);
+ break;
+ case MOXIE_F1_A:
+ fpr (stream, "%s\t%s", opcode->name,
+ reg_names[OP_A(iword)]);
+ break;
+ case MOXIE_F1_AB:
+ fpr (stream, "%s\t%s, %s", opcode->name,
+ reg_names[OP_A(iword)],
+ reg_names[OP_B(iword)]);
+ break;
+ case MOXIE_F1_A4:
+ {
+ unsigned imm;
+ if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
+ goto fail;
+ imm = bfd_getb32 (buffer);
+ fpr (stream, "%s\t%s, 0x%x", opcode->name,
+ reg_names[OP_A(iword)], imm);
+ length = 6;
+ }
+ break;
+ case MOXIE_F1_4:
+ {
+ unsigned imm;
+ if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
+ goto fail;
+ imm = bfd_getb32 (buffer);
+ fpr (stream, "%s\t0x%x", opcode->name, imm);
+ length = 6;
+ }
+ break;
+ case MOXIE_F1_M:
+ {
+ unsigned imm;
+ if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
+ goto fail;
+ imm = bfd_getb32 (buffer);
+ fpr (stream, "%s\t", opcode->name);
+ info->print_address_func ((bfd_vma) imm, info);
+ length = 6;
+ }
+ break;
+ case MOXIE_F1_AiB:
+ fpr (stream, "%s\t(%s), %s", opcode->name,
+ reg_names[OP_A(iword)], reg_names[OP_B(iword)]);
+ break;
+ case MOXIE_F1_ABi:
+ fpr (stream, "%s\t%s, (%s)", opcode->name,
+ reg_names[OP_A(iword)], reg_names[OP_B(iword)]);
+ break;
+ case MOXIE_F1_4A:
+ {
+ unsigned imm;
+ if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
+ goto fail;
+ imm = bfd_getb32 (buffer);
+ fpr (stream, "%s\t0x%x, %s",
+ opcode->name, imm, reg_names[OP_A(iword)]);
+ length = 6;
+ }
+ break;
+ case MOXIE_F1_AiB4:
+ {
+ unsigned imm;
+ if ((status = info->read_memory_func (addr+2, buffer, 4, info)))
+ goto fail;
+ imm = bfd_getb32 (buffer);
+ fpr (stream, "%s\t0x%x(%s), %s", opcode->name,
+ imm,
+ reg_names[OP_A(iword)],
+ reg_names[OP_B(iword)]);
+ length = 6;
+ }
+ break;
+ case MOXIE_F1_ABi4:
+ {
+ unsigned imm;
+ if ((status = info->read_memory_func (addr+2, buffer, 4, info)))
+ goto fail;
+ imm = bfd_getb32 (buffer);
+ fpr (stream, "%s\t%s, 0x%x(%s)",
+ opcode->name,
+ reg_names[OP_A(iword)],
+ imm,
+ reg_names[OP_B(iword)]);
+ length = 6;
+ }
+ break;
+ default:
+ abort ();
+ }
+ }
+ else if ((iword & (1<<14)) == 0)
+ {
+ /* Extract the Form 2 opcode. */
+ opcode = &moxie_form2_opc_info[(iword >> 12) & 3];
+ switch (opcode->itype)
+ {
+ case MOXIE_F2_A8V:
+ fpr (stream, "%s\t%s, 0x%x",
+ opcode->name,
+ reg_names[(iword >> 8) & 0xf],
+ iword & ((1 << 8) - 1));
+ break;
+ case MOXIE_F2_NARG:
+ fpr (stream, "%s", opcode->name);
+ break;
+ default:
+ abort();
+ }
+ }
+ else
+ {
+ /* Extract the Form 3 opcode. */
+ opcode = &moxie_form3_opc_info[(iword >> 10) & 15];
+ switch (opcode->itype)
+ {
+ case MOXIE_F3_PCREL:
+ fpr (stream, "%s\t", opcode->name);
+ info->print_address_func ((bfd_vma) (addr + INST2OFFSET(iword)),
+ info);
+ break;
+ default:
+ abort();
+ }
+ }
+
+ return length;
+
+ fail:
+ info->memory_error_func (status, addr, info);
+ return -1;
+}
projects / msp430-binutils.git / blobdiff