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| author | Richard Henderson <richard.henderson@linaro.org> | 2025-08-26 11:21:29 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2025-08-30 16:37:22 +0100 |
| commit | 8a4bb8b975f80022cdea27757cd8d14f13bf65a9 (patch) | |
| tree | fcd4d3ad628dcee797941ff00ec4b31c58842bc7 | |
| parent | 506538208ddabc9b15b02a7e865aa1b64f9f18e5 (diff) | |
| download | qemu-8a4bb8b975f80022cdea27757cd8d14f13bf65a9.zip qemu-8a4bb8b975f80022cdea27757cd8d14f13bf65a9.tar.gz qemu-8a4bb8b975f80022cdea27757cd8d14f13bf65a9.tar.bz2 | |
target/arm: Split out gen_wrap2_i32 helper
Wrapper to extract the low 32 bits, perform an operation,
and zero-extend back to 64 bits.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20250803014019.416797-5-richard.henderson@linaro.org
[PMM: fixed wrong output-reg argument in callsites; add comment]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/tcg/translate-a64.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index bb92bdc..c0fa9a4 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -8231,13 +8231,22 @@ static bool gen_rr(DisasContext *s, int rd, int rn, ArithOneOp fn) return true; } -static void gen_rbit32(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +/* + * Perform 32-bit operation fn on the low half of n; + * the high half of the output is zeroed. + */ +static void gen_wrap2_i32(TCGv_i64 d, TCGv_i64 n, NeonGenOneOpFn fn) { - TCGv_i32 t32 = tcg_temp_new_i32(); + TCGv_i32 t = tcg_temp_new_i32(); - tcg_gen_extrl_i64_i32(t32, tcg_rn); - gen_helper_rbit(t32, t32); - tcg_gen_extu_i32_i64(tcg_rd, t32); + tcg_gen_extrl_i64_i32(t, n); + fn(t, t); + tcg_gen_extu_i32_i64(d, t); +} + +static void gen_rbit32(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +{ + gen_wrap2_i32(tcg_rd, tcg_rn, gen_helper_rbit); } static void gen_rev16_xx(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn, TCGv_i64 mask) @@ -8293,11 +8302,7 @@ static void gen_clz64(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) static void gen_cls32(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) { - TCGv_i32 t32 = tcg_temp_new_i32(); - - tcg_gen_extrl_i64_i32(t32, tcg_rn); - tcg_gen_clrsb_i32(t32, t32); - tcg_gen_extu_i32_i64(tcg_rd, t32); + gen_wrap2_i32(tcg_rd, tcg_rn, tcg_gen_clrsb_i32); } TRANS(CLZ, gen_rr, a->rd, a->rn, a->sf ? gen_clz64 : gen_clz32) |