diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2019-05-23 14:47:43 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-05-23 14:47:43 +0100 |
| commit | 80ac954c369e7e61bd1ed00cef07b63e11f9c734 (patch) | |
| tree | 0273e854219d7bee5741a2c449864df423b0b694 | |
| parent | d418238dca7b4e0b124135827ead3076233052b1 (diff) | |
target/arm: Use extract2 for EXTR
This is, after all, how we implement extract2 in tcg/aarch64.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20190514011129.11330-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target/arm/translate-a64.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index b7c5a928b4..2b135b938c 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -4114,25 +4114,27 @@ static void disas_extract(DisasContext *s, uint32_t insn) } else { tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rm)); } - } else if (rm == rn) { /* ROR */ + } else { tcg_rm = cpu_reg(s, rm); + tcg_rn = cpu_reg(s, rn); + if (sf) { - tcg_gen_rotri_i64(tcg_rd, tcg_rm, imm); + /* Specialization to ROR happens in EXTRACT2. */ + tcg_gen_extract2_i64(tcg_rd, tcg_rm, tcg_rn, imm); } else { - TCGv_i32 tmp = tcg_temp_new_i32(); - tcg_gen_extrl_i64_i32(tmp, tcg_rm); - tcg_gen_rotri_i32(tmp, tmp, imm); - tcg_gen_extu_i32_i64(tcg_rd, tmp); - tcg_temp_free_i32(tmp); - } - } else { - tcg_rm = read_cpu_reg(s, rm, sf); - tcg_rn = read_cpu_reg(s, rn, sf); - tcg_gen_shri_i64(tcg_rm, tcg_rm, imm); - tcg_gen_shli_i64(tcg_rn, tcg_rn, bitsize - imm); - tcg_gen_or_i64(tcg_rd, tcg_rm, tcg_rn); - if (!sf) { - tcg_gen_ext32u_i64(tcg_rd, tcg_rd); + TCGv_i32 t0 = tcg_temp_new_i32(); + + tcg_gen_extrl_i64_i32(t0, tcg_rm); + if (rm == rn) { + tcg_gen_rotri_i32(t0, t0, imm); + } else { + TCGv_i32 t1 = tcg_temp_new_i32(); + tcg_gen_extrl_i64_i32(t1, tcg_rn); + tcg_gen_extract2_i32(t0, t0, t1, imm); + tcg_temp_free_i32(t1); + } + tcg_gen_extu_i32_i64(tcg_rd, t0); + tcg_temp_free_i32(t0); } } } |