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X-Received-From: 2607:f8b0:4864:20::644 Subject: [Qemu-devel] [PATCH v3 64/69] target/arm: Convert T16, shift immediate X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- target/arm/translate.c | 26 ++------------------------ target/arm/t16.decode | 8 ++++++++ 2 files changed, 10 insertions(+), 24 deletions(-) diff --git a/target/arm/translate.c b/target/arm/translate.c index 5fb0e2066b..dd292b3042 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -10731,7 +10731,7 @@ static void disas_thumb2_insn(DisasContext *s, uint= 32_t insn) =20 static void disas_thumb_insn(DisasContext *s, uint32_t insn) { - uint32_t val, op, rm, rd, shift; + uint32_t val, rd; int32_t offset; TCGv_i32 tmp; TCGv_i32 tmp2; @@ -10743,29 +10743,7 @@ static void disas_thumb_insn(DisasContext *s, uint= 32_t insn) /* fall back to legacy decoder */ =20 switch (insn >> 12) { - case 0: case 1: - - rd =3D insn & 7; - op =3D (insn >> 11) & 3; - if (op =3D=3D 3) { - /* - * 0b0001_1xxx_xxxx_xxxx - * - Add, subtract (three low registers) - * - Add, subtract (two low registers and immediate) - * In decodetree. - */ - goto illegal_op; - } else { - /* shift immediate */ - rm =3D (insn >> 3) & 7; - shift =3D (insn >> 6) & 0x1f; - tmp =3D load_reg(s, rm); - gen_arm_shift_im(tmp, op, shift, s->condexec_mask =3D=3D 0); - if (!s->condexec_mask) - gen_logic_CC(tmp); - store_reg(s, rd, tmp); - } - break; + case 0: case 1: /* add/sub (3reg, 2reg imm), shift imm; in decodetree = */ case 2: case 3: /* add, sub, cmp, mov (reg, imm), in decodetree */ goto illegal_op; case 4: diff --git a/target/arm/t16.decode b/target/arm/t16.decode index f128110dee..79a1d66d6c 100644 --- a/target/arm/t16.decode +++ b/target/arm/t16.decode @@ -126,6 +126,14 @@ ADD_rri 10101 rd:3 ........ \ STM 11000 ... ........ @ldstm LDM_t16 11001 ... ........ @ldstm =20 +# Shift (immediate) + +@shift_i ..... shim:5 rm:3 rd:3 &s_rrr_shi %s rn=3D%reg_0 + +MOV_rxri 000 00 ..... ... ... @shift_i shty=3D0 # LSL +MOV_rxri 000 01 ..... ... ... @shift_i shty=3D1 # LSR +MOV_rxri 000 10 ..... ... ... @shift_i shty=3D2 # ASR + # Add/subtract (three low registers) =20 @addsub_3 ....... rm:3 rn:3 rd:3 \ --=20 2.17.1