diff options
| author | Claudio Fontana <claudio.fontana@linaro.org> | 2013-12-17 19:42:35 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2013-12-17 20:12:51 +0000 |
| commit | e80c502023d332fb60866eb378e715ab3f158b72 (patch) | |
| tree | 83c41fc5710b93ee5306adde4df6a7c4f44ff2a0 /target-arm | |
| parent | afd3fe4ce56e6fb0d0384ddb8e3c4fac01935c37 (diff) | |
target-arm: A64: add support for 1-src CLS insn
this patch adds support for the CLS instruction.
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')
| -rw-r--r-- | target-arm/helper-a64.c | 10 | ||||
| -rw-r--r-- | target-arm/helper-a64.h | 2 | ||||
| -rw-r--r-- | target-arm/translate-a64.c | 20 |
3 files changed, 31 insertions, 1 deletions
diff --git a/target-arm/helper-a64.c b/target-arm/helper-a64.c index cccaac6230..d3f706754f 100644 --- a/target-arm/helper-a64.c +++ b/target-arm/helper-a64.c @@ -50,6 +50,16 @@ uint64_t HELPER(clz64)(uint64_t x) return clz64(x); } +uint64_t HELPER(cls64)(uint64_t x) +{ + return clrsb64(x); +} + +uint32_t HELPER(cls32)(uint32_t x) +{ + return clrsb32(x); +} + uint64_t HELPER(rbit64)(uint64_t x) { /* assign the correct byte position */ diff --git a/target-arm/helper-a64.h b/target-arm/helper-a64.h index 9959139157..a163a94322 100644 --- a/target-arm/helper-a64.h +++ b/target-arm/helper-a64.h @@ -19,4 +19,6 @@ DEF_HELPER_FLAGS_2(udiv64, TCG_CALL_NO_RWG_SE, i64, i64, i64) DEF_HELPER_FLAGS_2(sdiv64, TCG_CALL_NO_RWG_SE, s64, s64, s64) DEF_HELPER_FLAGS_1(clz64, TCG_CALL_NO_RWG_SE, i64, i64) +DEF_HELPER_FLAGS_1(cls64, TCG_CALL_NO_RWG_SE, i64, i64) +DEF_HELPER_FLAGS_1(cls32, TCG_CALL_NO_RWG_SE, i32, i32) DEF_HELPER_FLAGS_1(rbit64, TCG_CALL_NO_RWG_SE, i64, i64) diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c index 2111bcdd10..2bb1795959 100644 --- a/target-arm/translate-a64.c +++ b/target-arm/translate-a64.c @@ -1114,6 +1114,24 @@ static void handle_clz(DisasContext *s, unsigned int sf, } } +static void handle_cls(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_cls64(tcg_rd, tcg_rn); + } else { + TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); + tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); + gen_helper_cls32(tcg_tmp32, tcg_tmp32); + tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); + tcg_temp_free_i32(tcg_tmp32); + } +} + static void handle_rbit(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { @@ -1236,7 +1254,7 @@ static void disas_data_proc_1src(DisasContext *s, uint32_t insn) handle_clz(s, sf, rn, rd); break; case 5: /* CLS */ - unsupported_encoding(s, insn); + handle_cls(s, sf, rn, rd); break; } } |