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Thu, 28 Aug 2025 04:34:46 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 12/32] target/arm: Implement CTZ, CNT, ABS Date: Thu, 28 Aug 2025 12:34:09 +0100 Message-ID: <20250828113430.3214314-13-peter.maydell@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250828113430.3214314-1-peter.maydell@linaro.org> References: <20250828113430.3214314-1-peter.maydell@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=2a00:1450:4864:20::32e; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32e.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: 1756381035696124100 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell Message-id: 20250803014019.416797-6-richard.henderson@linaro.org [PMM: fix tcg_rd/tcg_rn mixup] Signed-off-by: Peter Maydell --- target/arm/tcg/a64.decode | 4 ++++ target/arm/tcg/translate-a64.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode index a886b3ba4c7..766c610c019 100644 --- a/target/arm/tcg/a64.decode +++ b/target/arm/tcg/a64.decode @@ -726,6 +726,10 @@ REV64 1 10 11010110 00000 000011 ..... .....= @rr CLZ . 10 11010110 00000 000100 ..... ..... @rr_sf CLS . 10 11010110 00000 000101 ..... ..... @rr_sf =20 +CTZ . 10 11010110 00000 000110 ..... ..... @rr_sf +CNT . 10 11010110 00000 000111 ..... ..... @rr_sf +ABS . 10 11010110 00000 001000 ..... ..... @rr_sf + &pacaut rd rn z @pacaut . .. ........ ..... .. z:1 ... rn:5 rd:5 &pacaut =20 diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index c0fa9a44e7a..259aa70a36d 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -8308,6 +8308,37 @@ static void gen_cls32(TCGv_i64 tcg_rd, TCGv_i64 tcg_= rn) TRANS(CLZ, gen_rr, a->rd, a->rn, a->sf ? gen_clz64 : gen_clz32) TRANS(CLS, gen_rr, a->rd, a->rn, a->sf ? tcg_gen_clrsb_i64 : gen_cls32) =20 +static void gen_ctz32(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +{ + TCGv_i32 t32 =3D tcg_temp_new_i32(); + + tcg_gen_extrl_i64_i32(t32, tcg_rn); + tcg_gen_ctzi_i32(t32, t32, 32); + tcg_gen_extu_i32_i64(tcg_rd, t32); +} + +static void gen_ctz64(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +{ + tcg_gen_ctzi_i64(tcg_rd, tcg_rn, 64); +} + +static void gen_cnt32(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +{ + gen_wrap2_i32(tcg_rd, tcg_rn, tcg_gen_ctpop_i32); +} + +static void gen_abs32(TCGv_i64 tcg_rd, TCGv_i64 tcg_rn) +{ + gen_wrap2_i32(tcg_rd, tcg_rn, tcg_gen_abs_i32); +} + +TRANS_FEAT(CTZ, aa64_cssc, gen_rr, a->rd, a->rn, + a->sf ? gen_ctz64 : gen_ctz32) +TRANS_FEAT(CNT, aa64_cssc, gen_rr, a->rd, a->rn, + a->sf ? tcg_gen_ctpop_i64 : gen_cnt32) +TRANS_FEAT(ABS, aa64_cssc, gen_rr, a->rd, a->rn, + a->sf ? tcg_gen_abs_i64 : gen_abs32) + static bool gen_pacaut(DisasContext *s, arg_pacaut *a, NeonGenTwo64OpEnvFn= fn) { TCGv_i64 tcg_rd, tcg_rn; --=20 2.43.0