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Sat, 21 Jun 2025 16:54:28 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 078/101] target/arm: Implement SVE2p1 PTRUE (predicate as counter) Date: Sat, 21 Jun 2025 16:50:14 -0700 Message-ID: <20250621235037.74091-79-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250621235037.74091-1-richard.henderson@linaro.org> References: <20250621235037.74091-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::436; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x436.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1750550484691116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson --- target/arm/tcg/translate-sve.c | 16 ++++++++++++++++ target/arm/tcg/sve.decode | 1 + 2 files changed, 17 insertions(+) diff --git a/target/arm/tcg/translate-sve.c b/target/arm/tcg/translate-sve.c index 3e82c1ed49..43993fd193 100644 --- a/target/arm/tcg/translate-sve.c +++ b/target/arm/tcg/translate-sve.c @@ -1679,6 +1679,22 @@ static bool do_predset(DisasContext *s, int esz, int= rd, int pat, bool setflag) =20 TRANS_FEAT(PTRUE, aa64_sve, do_predset, a->esz, a->rd, a->pat, a->s) =20 +static bool trans_PTRUE_cnt(DisasContext *s, arg_PTRUE_cnt *a) +{ + if (!dc_isar_feature(aa64_sme2_or_sve2p1, s)) { + return false; + } + if (sve_access_check(s)) { + /* Canonical TRUE is 0 count, invert bit, plus element size. */ + int val =3D (1 << 15) | (1 << a->esz); + + /* Write val to the first uint64_t; clear all of the rest. */ + tcg_gen_gvec_dup_imm(MO_64, pred_full_reg_offset(s, a->rd), + 8, size_for_gvec(pred_full_reg_size(s)), val); + } + return true; +} + /* Note pat =3D=3D 31 is #all, to set all elements. */ TRANS_FEAT_NONSTREAMING(SETFFR, aa64_sve, do_predset, 0, FFR_PRED_NUM, 31, false) diff --git a/target/arm/tcg/sve.decode b/target/arm/tcg/sve.decode index fbc4487b06..13a76f773d 100644 --- a/target/arm/tcg/sve.decode +++ b/target/arm/tcg/sve.decode @@ -730,6 +730,7 @@ PTEST 00100101 01 010000 11 pg:4 0 rn:4 0 0000 =20 # SVE predicate initialize PTRUE 00100101 esz:2 01100 s:1 111000 pat:5 0 rd:4 +PTRUE_cnt 00100101 esz:2 1000000111100000010 ... rd=3D%pnd =20 # SVE initialize FFR SETFFR 00100101 0010 1100 1001 0000 0000 0000 --=20 2.43.0