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X-Received-From: 2607:f8b0:4864:20::444 Subject: [Qemu-devel] [PATCH 09/17] target/arm: Implement the SUBP instruction X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 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" Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/translate-a64.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 6583ad93b1..98ff60c161 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -5111,19 +5111,39 @@ static void handle_crc32(DisasContext *s, */ static void disas_data_proc_2src(DisasContext *s, uint32_t insn) { - unsigned int sf, rm, opcode, rn, rd; + unsigned int sf, rm, opcode, rn, rd, setflag; sf =3D extract32(insn, 31, 1); + setflag =3D extract32(insn, 29, 1); rm =3D extract32(insn, 16, 5); opcode =3D extract32(insn, 10, 6); rn =3D extract32(insn, 5, 5); rd =3D extract32(insn, 0, 5); =20 - if (extract32(insn, 29, 1)) { + if (setflag && opcode !=3D 0) { unallocated_encoding(s); return; } =20 switch (opcode) { + case 0: /* SUBP(S) */ + if (sf =3D=3D 0 || !dc_isar_feature(aa64_mte_insn_reg, s)) { + goto do_unallocated; + } else { + TCGv_i64 tcg_n, tcg_m, tcg_d; + + tcg_n =3D read_cpu_reg_sp(s, rn, true); + tcg_m =3D read_cpu_reg_sp(s, rm, true); + tcg_gen_sextract_i64(tcg_n, tcg_n, 0, 55); + tcg_gen_sextract_i64(tcg_m, tcg_m, 0, 55); + tcg_d =3D cpu_reg(s, rd); + + if (setflag) { + gen_sub_CC(true, tcg_d, tcg_n, tcg_m); + } else { + tcg_gen_sub_i64(tcg_d, tcg_n, tcg_m); + } + } + break; case 2: /* UDIV */ handle_div(s, false, sf, rm, rn, rd); break; --=20 2.17.2