diff options
| -rw-r--r-- | target-m68k/translate.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/target-m68k/translate.c b/target-m68k/translate.c index e59567360a..1836a224f2 100644 --- a/target-m68k/translate.c +++ b/target-m68k/translate.c @@ -1105,6 +1105,30 @@ DISAS_INSN(scc) tcg_temp_free(tmp); } +DISAS_INSN(dbcc) +{ + TCGLabel *l1; + TCGv reg; + TCGv tmp; + int16_t offset; + uint32_t base; + + reg = DREG(insn, 0); + base = s->pc; + offset = (int16_t)read_im16(env, s); + l1 = gen_new_label(); + gen_jmpcc(s, (insn >> 8) & 0xf, l1); + + tmp = tcg_temp_new(); + tcg_gen_ext16s_i32(tmp, reg); + tcg_gen_addi_i32(tmp, tmp, -1); + gen_partset_reg(OS_WORD, reg, tmp); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1); + gen_jmp_tb(s, 1, base + offset); + gen_set_label(l1); + gen_jmp_tb(s, 0, s->pc); +} + DISAS_INSN(undef_mac) { gen_exception(s, s->pc - 2, EXCP_LINEA); @@ -3137,6 +3161,7 @@ void register_m68k_insns (CPUM68KState *env) INSN(addsubq, 5080, f0c0, M68000); INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */ INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */ + INSN(dbcc, 50c8, f0f8, M68000); INSN(addsubq, 5080, f1c0, CF_ISA_A); INSN(tpf, 51f8, fff8, CF_ISA_A); |