diff options
Diffstat (limited to 'opcodes/s390-dis.c')
| -rw-r--r-- | opcodes/s390-dis.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/opcodes/s390-dis.c b/opcodes/s390-dis.c index b9eeb79..37ed2e7 100644 --- a/opcodes/s390-dis.c +++ b/opcodes/s390-dis.c @@ -166,6 +166,8 @@ print_insn_s390 (bfd_vma memaddr, struct disassemble_info *info) if (status == 0) { + const struct s390_opcode *op; + /* Find the first match in the opcode table. */ opcode_end = s390_opcodes + s390_num_opcodes; for (opcode = s390_opcodes + opc_index[(int) buffer[0]]; @@ -178,6 +180,7 @@ print_insn_s390 (bfd_vma memaddr, struct disassemble_info *info) /* Check architecture. */ if (!(opcode->modes & current_arch_mask)) continue; + /* Check signature of the opcode. */ if ((buffer[1] & opcode->mask[1]) != opcode->opcode[1] || (buffer[2] & opcode->mask[2]) != opcode->opcode[2] @@ -186,6 +189,28 @@ print_insn_s390 (bfd_vma memaddr, struct disassemble_info *info) || (buffer[5] & opcode->mask[5]) != opcode->opcode[5]) continue; + /* Advance to an opcode with a more specific mask. */ + for (op = opcode + 1; op < opcode_end; op++) + { + if ((buffer[0] & op->mask[0]) != op->opcode[0]) + break; + + if ((buffer[1] & op->mask[1]) != op->opcode[1] + || (buffer[2] & op->mask[2]) != op->opcode[2] + || (buffer[3] & op->mask[3]) != op->opcode[3] + || (buffer[4] & op->mask[4]) != op->opcode[4] + || (buffer[5] & op->mask[5]) != op->opcode[5]) + continue; + + if (((int)opcode->mask[0] + opcode->mask[1] + + opcode->mask[2] + opcode->mask[3] + + opcode->mask[4] + opcode->mask[5]) < + ((int)op->mask[0] + op->mask[1] + + op->mask[2] + op->mask[3] + + op->mask[4] + op->mask[5])) + opcode = op; + } + /* The instruction is valid. */ if (opcode->operands[0] != 0) (*info->fprintf_func) (info->stream, "%s\t", opcode->name); |