diff options
Diffstat (limited to 'target-arm/translate.c')
| -rw-r--r-- | target-arm/translate.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c index 75c0ad413a..e99fc183b4 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -7569,11 +7569,16 @@ static void disas_arm_insn(CPUState * env, DisasContext *s) } break; case 2: /* Multiplies (Type 3). */ - tmp = load_reg(s, rm); - tmp2 = load_reg(s, rs); - if (insn & (1 << 20)) { + switch ((insn >> 20) & 0x7) { + case 5: + if (((insn >> 6) ^ (insn >> 7)) & 1) { + /* op2 not 00x or 11x : UNDEF */ + goto illegal_op; + } /* Signed multiply most significant [accumulate]. (SMMUL, SMMLA, SMMLS) */ + tmp = load_reg(s, rm); + tmp2 = load_reg(s, rs); tmp64 = gen_muls_i64_i32(tmp, tmp2); if (rd != 15) { @@ -7592,7 +7597,15 @@ static void disas_arm_insn(CPUState * env, DisasContext *s) tcg_gen_trunc_i64_i32(tmp, tmp64); tcg_temp_free_i64(tmp64); store_reg(s, rn, tmp); - } else { + break; + case 0: + case 4: + /* SMLAD, SMUAD, SMLSD, SMUSD, SMLALD, SMLSLD */ + if (insn & (1 << 7)) { + goto illegal_op; + } + tmp = load_reg(s, rm); + tmp2 = load_reg(s, rs); if (insn & (1 << 5)) gen_swap_half(tmp2); gen_smul_dual(tmp, tmp2); @@ -7625,6 +7638,9 @@ static void disas_arm_insn(CPUState * env, DisasContext *s) } store_reg(s, rn, tmp); } + break; + default: + goto illegal_op; } break; case 3: |