diff options
Diffstat (limited to 'opcodes/moxie-dis.c')
| -rw-r--r-- | opcodes/moxie-dis.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/opcodes/moxie-dis.c b/opcodes/moxie-dis.c new file mode 100644 index 0000000..b1d123f --- /dev/null +++ b/opcodes/moxie-dis.c @@ -0,0 +1,184 @@ +/* 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) + +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_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_form2_opc_info[(iword >> 12) & 3]; + switch (opcode->itype) + { + case MOXIE_F3_NARG: + fpr (stream, "%s", opcode->name); + break; + default: + abort(); + } + } + + return length; + + fail: + info->memory_error_func (status, addr, info); + return -1; +} |