diff options
| author | Alexander Graf <agraf@suse.de> | 2013-12-17 19:42:35 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2013-12-17 20:12:51 +0000 |
| commit | 82e14b02a2bd822af6db2ef728a1698b9a24e50c (patch) | |
| tree | 186114efe0c06ac74cd284f42d6393df547e8150 /target-arm/translate-a64.c | |
| parent | 680ead216e666e5cc192fe86adf30563999a5dd8 (diff) | |
target-arm: A64: add support for 1-src RBIT insn
This adds support for the C5.6.147 RBIT instruction.
Signed-off-by: Alexander Graf <agraf@suse.de>
[claudio: adapted to new decoder, use bswap64,
make RBIT part standalone from the rest of the patch,
splitting REV into a separate patch]
Signed-off-by: Claudio Fontana <claudio.fontana@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-arm/translate-a64.c')
| -rw-r--r-- | target-arm/translate-a64.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index e5481da0f6..0ed21fcf74 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -1062,6 +1062,24 @@ static void handle_clz(DisasContext *s, unsigned int sf, } } +static void handle_rbit(DisasContext *s, unsigned int sf, + unsigned int rn, unsigned int rd) +{ + TCGv_i64 tcg_rd, tcg_rn; + tcg_rd = cpu_reg(s, rd); + tcg_rn = cpu_reg(s, rn); + + if (sf) { + gen_helper_rbit64(tcg_rd, tcg_rn); + } else { + TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); + tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); + gen_helper_rbit(tcg_tmp32, tcg_tmp32); + tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); + tcg_temp_free_i32(tcg_tmp32); + } +} + /* C3.5.7 Data-processing (1 source) * 31 30 29 28 21 20 16 15 10 9 5 4 0 * +----+---+---+-----------------+---------+--------+------+------+ @@ -1084,6 +1102,8 @@ static void disas_data_proc_1src(DisasContext *s, uint32_t insn) switch (opcode) { case 0: /* RBIT */ + handle_rbit(s, sf, rn, rd); + break; case 1: /* REV16 */ case 2: /* REV32 */ case 3: /* REV64 */ |