| /* Disassemble moxie instructions. |
| Copyright (C) 2009-2016 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 "sysdep.h" |
| #include <stdio.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; |
| |
| if (info->endian == BFD_ENDIAN_BIG) |
| iword = bfd_getb16 (buffer); |
| else |
| iword = bfd_getl16 (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; |
| if (info->endian == BFD_ENDIAN_BIG) |
| imm = bfd_getb32 (buffer); |
| else |
| imm = bfd_getl32 (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; |
| if (info->endian == BFD_ENDIAN_BIG) |
| imm = bfd_getb32 (buffer); |
| else |
| imm = bfd_getl32 (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; |
| if (info->endian == BFD_ENDIAN_BIG) |
| imm = bfd_getb32 (buffer); |
| else |
| imm = bfd_getl32 (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; |
| if (info->endian == BFD_ENDIAN_BIG) |
| imm = bfd_getb32 (buffer); |
| else |
| imm = bfd_getl32 (buffer); |
| fpr (stream, "%s\t0x%x, %s", |
| opcode->name, imm, reg_names[OP_A(iword)]); |
| length = 6; |
| } |
| break; |
| case MOXIE_F1_AiB2: |
| { |
| unsigned imm; |
| if ((status = info->read_memory_func (addr+2, buffer, 2, info))) |
| goto fail; |
| if (info->endian == BFD_ENDIAN_BIG) |
| imm = bfd_getb16 (buffer); |
| else |
| imm = bfd_getl16 (buffer); |
| fpr (stream, "%s\t0x%x(%s), %s", opcode->name, |
| imm, |
| reg_names[OP_A(iword)], |
| reg_names[OP_B(iword)]); |
| length = 4; |
| } |
| break; |
| case MOXIE_F1_ABi2: |
| { |
| unsigned imm; |
| if ((status = info->read_memory_func (addr+2, buffer, 2, info))) |
| goto fail; |
| if (info->endian == BFD_ENDIAN_BIG) |
| imm = bfd_getb16 (buffer); |
| else |
| imm = bfd_getl16 (buffer); |
| fpr (stream, "%s\t%s, 0x%x(%s)", |
| opcode->name, |
| reg_names[OP_A(iword)], |
| imm, |
| reg_names[OP_B(iword)]); |
| length = 4; |
| } |
| break; |
| case MOXIE_BAD: |
| fpr (stream, "bad"); |
| 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; |
| case MOXIE_BAD: |
| fpr (stream, "bad"); |
| 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) + 2), |
| info); |
| break; |
| case MOXIE_BAD: |
| fpr (stream, "bad"); |
| break; |
| default: |
| abort(); |
| } |
| } |
| |
| return length; |
| |
| fail: |
| info->memory_error_func (status, addr, info); |
| return -1; |
| } |