diff options
Diffstat (limited to 'target-arm/translate-a64.c')
| -rw-r--r-- | target-arm/translate-a64.c | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 9832cc3c22..6af593a26e 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -3774,6 +3774,54 @@ static void handle_shift_reg(DisasContext *s, tcg_temp_free_i64(tcg_shift); } +/* CRC32[BHWX], CRC32C[BHWX] */ +static void handle_crc32(DisasContext *s, + unsigned int sf, unsigned int sz, bool crc32c, + unsigned int rm, unsigned int rn, unsigned int rd) +{ + TCGv_i64 tcg_acc, tcg_val; + TCGv_i32 tcg_bytes; + + if (!arm_dc_feature(s, ARM_FEATURE_CRC) + || (sf == 1 && sz != 3) + || (sf == 0 && sz == 3)) { + unallocated_encoding(s); + return; + } + + if (sz == 3) { + tcg_val = cpu_reg(s, rm); + } else { + uint64_t mask; + switch (sz) { + case 0: + mask = 0xFF; + break; + case 1: + mask = 0xFFFF; + break; + case 2: + mask = 0xFFFFFFFF; + break; + default: + g_assert_not_reached(); + } + tcg_val = new_tmp_a64(s); + tcg_gen_andi_i64(tcg_val, cpu_reg(s, rm), mask); + } + + tcg_acc = cpu_reg(s, rn); + tcg_bytes = tcg_const_i32(1 << sz); + + if (crc32c) { + gen_helper_crc32c_64(cpu_reg(s, rd), tcg_acc, tcg_val, tcg_bytes); + } else { + gen_helper_crc32_64(cpu_reg(s, rd), tcg_acc, tcg_val, tcg_bytes); + } + + tcg_temp_free_i32(tcg_bytes); +} + /* C3.5.8 Data-processing (2 source) * 31 30 29 28 21 20 16 15 10 9 5 4 0 * +----+---+---+-----------------+------+--------+------+------+ @@ -3821,8 +3869,12 @@ static void disas_data_proc_2src(DisasContext *s, uint32_t insn) case 21: case 22: case 23: /* CRC32 */ - unsupported_encoding(s, insn); + { + int sz = extract32(opcode, 0, 2); + bool crc32c = extract32(opcode, 2, 1); + handle_crc32(s, sf, sz, crc32c, rm, rn, rd); break; + } default: unallocated_encoding(s); break; |