diff options
Diffstat (limited to 'target-arm/translate.c')
| -rw-r--r-- | target-arm/translate.c | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c index 0cf933d021..c0ffa9fca8 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -4744,7 +4744,10 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) /* Two registers and shift. */ op = (insn >> 8) & 0xf; if (insn & (1 << 7)) { - /* 64-bit shift. */ + /* 64-bit shift. */ + if (op > 7) { + return 1; + } size = 3; } else { size = 2; @@ -4757,6 +4760,12 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) if (op < 8) { /* Shift by immediate: VSHR, VSRA, VRSHR, VRSRA, VSRI, VSHL, VQSHL, VQSHLU. */ + if (q && ((rd | rm) & 1)) { + return 1; + } + if (!u && (op == 4 || op == 6)) { + return 1; + } /* Right shifts are encoded as N - shift, where N is the element size in bits. */ if (op <= 4) @@ -4804,20 +4813,13 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) gen_helper_neon_rshl_s64(cpu_V0, cpu_V0, cpu_V1); break; case 4: /* VSRI */ - if (!u) - return 1; gen_helper_neon_shl_u64(cpu_V0, cpu_V0, cpu_V1); break; case 5: /* VSHL, VSLI */ gen_helper_neon_shl_u64(cpu_V0, cpu_V0, cpu_V1); break; case 6: /* VQSHLU */ - if (u) { - gen_helper_neon_qshlu_s64(cpu_V0, - cpu_V0, cpu_V1); - } else { - return 1; - } + gen_helper_neon_qshlu_s64(cpu_V0, cpu_V0, cpu_V1); break; case 7: /* VQSHL */ if (u) { @@ -4865,8 +4867,6 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) GEN_NEON_INTEGER_OP(rshl); break; case 4: /* VSRI */ - if (!u) - return 1; GEN_NEON_INTEGER_OP(shl); break; case 5: /* VSHL, VSLI */ @@ -4874,13 +4874,10 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) case 0: gen_helper_neon_shl_u8(tmp, tmp, tmp2); break; case 1: gen_helper_neon_shl_u16(tmp, tmp, tmp2); break; case 2: gen_helper_neon_shl_u32(tmp, tmp, tmp2); break; - default: return 1; + default: abort(); } break; case 6: /* VQSHLU */ - if (!u) { - return 1; - } switch (size) { case 0: gen_helper_neon_qshlu_s8(tmp, tmp, tmp2); @@ -4892,7 +4889,7 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) gen_helper_neon_qshlu_s32(tmp, tmp, tmp2); break; default: - return 1; + abort(); } break; case 7: /* VQSHL */ @@ -4950,7 +4947,9 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) /* Shift by immediate and narrow: VSHRN, VRSHRN, VQSHRN, VQRSHRN. */ int input_unsigned = (op == 8) ? !u : u; - + if (rm & 1) { + return 1; + } shift = shift - (1 << (size + 3)); size++; if (size == 3) { @@ -5018,9 +5017,10 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) tcg_temp_free_i32(tmp2); } } else if (op == 10) { - /* VSHLL */ - if (q || size == 3) + /* VSHLL, VMOVL */ + if (q || (rd & 1)) { return 1; + } tmp = neon_load_reg(rm, 0); tmp2 = neon_load_reg(rm, 1); for (pass = 0; pass < 2; pass++) { @@ -5061,6 +5061,9 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn) } } else if (op >= 14) { /* VCVT fixed-point. */ + if (!(insn & (1 << 21)) || (q && ((rd | rm) & 1))) { + return 1; + } /* We have already masked out the must-be-1 top bit of imm6, * hence this 32-shift where the ARM ARM has 64-imm6. */ |