diff options
| author | Richard Henderson | 2019-09-04 21:30:00 +0200 |
|---|---|---|
| committer | Peter Maydell | 2019-09-05 14:23:03 +0200 |
| commit | ea96b374641bc429269096d88d4e91ee544273e9 (patch) | |
| tree | cfdbde2f522137f781b62d5a81b6c6cae4b4bdfe | |
| parent | target/arm: Convert Halfword multiply and multiply accumulate (diff) | |
| download | qemu-ea96b374641bc429269096d88d4e91ee544273e9.tar.gz qemu-ea96b374641bc429269096d88d4e91ee544273e9.tar.xz qemu-ea96b374641bc429269096d88d4e91ee544273e9.zip | |
target/arm: Simplify op_smlaxxx for SMLAL*
Since all of the inputs and outputs are i32, dispense with
the intermediate promotion to i64 and use tcg_gen_add2_i32.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190904193059.26202-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/translate.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/target/arm/translate.c b/target/arm/translate.c index 5306e93470..37aa873e25 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -8177,8 +8177,7 @@ DO_QADDSUB(QDSUB, false, true) static bool op_smlaxxx(DisasContext *s, arg_rrrr *a, int add_long, bool nt, bool mt) { - TCGv_i32 t0, t1; - TCGv_i64 t64; + TCGv_i32 t0, t1, tl, th; if (s->thumb ? !arm_dc_feature(s, ARM_FEATURE_THUMB_DSP) @@ -8202,12 +8201,14 @@ static bool op_smlaxxx(DisasContext *s, arg_rrrr *a, store_reg(s, a->rd, t0); break; case 2: - t64 = tcg_temp_new_i64(); - tcg_gen_ext_i32_i64(t64, t0); + tl = load_reg(s, a->ra); + th = load_reg(s, a->rd); + t1 = tcg_const_i32(0); + tcg_gen_add2_i32(tl, th, tl, th, t0, t1); tcg_temp_free_i32(t0); - gen_addq(s, t64, a->ra, a->rd); - gen_storeq_reg(s, a->ra, a->rd, t64); - tcg_temp_free_i64(t64); + tcg_temp_free_i32(t1); + store_reg(s, a->ra, tl); + store_reg(s, a->rd, th); break; default: g_assert_not_reached(); |