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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [opcodes/] [moxie-dis.c] - Rev 227
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/* 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; }