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([2602:ae:1547:e101:3cf2:c634:5b19:25f6]) by smtp.gmail.com with ESMTPSA id s22-20020a17090aba1600b001d9780b7779sm4227856pjr.15.2022.06.07.13.33.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jun 2022 13:33:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=WYa9Ij7DGXX4UaDE3YZGCzVfYSAzgGKdab54muYOC2Q=; b=P/SdpQ+7mvHVs1z6glcl6s4SaN7KF6induAAqWnrxC6C4PW667b4UZQvzF+7k5KnhP 0/uwtjEGTjfFwPk6gK8+ag4f6bPnGYRs1k+acE/63SuK4fWd2B9cf571nUqYc3rvZgAT 5W0hAmRmQDah6CO4dO19uah+puT0l3JDnlqpbmSoLWRav1gqHPTXLmAHxywuH4dJvQVj pV+0wOBs0/zJ9XU0u5sEbc39tZATL3AIwqVanrcPTmjneQoxWYRBigmjmPYs3BRBxi8+ uI63sPaeqK24CkrBI9xKBJj9906wunMRtReLitB/HexZY2GP4q4MhW46NesVVfjUb2Nt Q60w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WYa9Ij7DGXX4UaDE3YZGCzVfYSAzgGKdab54muYOC2Q=; b=nHJRienV+rMMVydgW0N6dXUxLq2Ctkt45AFORhuUm1w71obeD8Jg3k1+UHLiTVUBW0 cdBsYZa9G30mgufXMEkPGmp8Wi/d8fUDEMjauAtmZE+cWpNm3BBmhgZ8kfKjxLS/Myoq ZElDtS5agPGbsD0JZ0BceKtgIKRQPVrA+N0s/AYqB5MTFGEEEmOHDfacYxqZvzdeMW6h GPJtUh5rXEQLdQw5GEZJvb6oetvF0rT6iGxqsXgXAEQkS9A4A3h9dnHIPfPY0YIvjBcW 6vEofsv7ROKBEcPgUmUYKh5FZU6SrVe/cQ1Lv/Elrzuulu0e4VXX0xv114XvCjMFtoRE 1OCg== X-Gm-Message-State: AOAM530ANdRCIkYTHGeFucKe8BauuLodMGX6m0aXuSNFGUeqhlKFpmi/ IopiPKvLrZnIfBFLMdtoJCzwOgBEye4ECw== X-Google-Smtp-Source: ABdhPJyjHBd2YlPpmyqSt4kq3X5sN1Mj1rhvfjpQdX5m9302FIauPj9H2i1nKnyJPvAu+VyGa6IHag== X-Received: by 2002:a63:8241:0:b0:3fe:2e64:95f0 with SMTP id w62-20020a638241000000b003fe2e6495f0mr133653pgd.190.1654634022703; Tue, 07 Jun 2022 13:33:42 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org Subject: [PATCH v2 38/71] target/arm: Introduce sve_vqm1_for_el_sm Date: Tue, 7 Jun 2022 13:32:33 -0700 Message-Id: <20220607203306.657998-39-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220607203306.657998-1-richard.henderson@linaro.org> References: <20220607203306.657998-1-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::52f; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x52f.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, T_SCC_BODY_TEXT_LINE=-0.01, T_SPF_TEMPERROR=0.01 autolearn=unavailable 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" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1654636728501100001 Content-Type: text/plain; charset="utf-8" When Streaming SVE mode is enabled, the size is taken from SMCR_ELx instead of ZCR_ELx. The format is shared, but the set of vector lengths is not. Further, Streaming SVE does not require any particular length to be supported. Adjust sve_vqm1_for_el to pass the current value of PSTATE.SM to the new function. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/cpu.h | 9 +++++++-- target/arm/helper.c | 32 +++++++++++++++++++++++++------- 2 files changed, 32 insertions(+), 9 deletions(-) diff --git a/target/arm/cpu.h b/target/arm/cpu.h index d81d1bedf9..d7d364abbb 100644 --- a/target/arm/cpu.h +++ b/target/arm/cpu.h @@ -1140,13 +1140,18 @@ int sve_exception_el(CPUARMState *env, int cur_el); int sme_exception_el(CPUARMState *env, int cur_el); =20 /** - * sve_vqm1_for_el: + * sve_vqm1_for_el_sm: * @env: CPUARMState * @el: exception level + * @sm: streaming mode * - * Compute the current SVE vector length for @el, in units of + * Compute the current vector length for @el & @sm, in units of * Quadwords Minus 1 -- the same scale used for ZCR_ELx.LEN. + * If @sm, compute for SVL, otherwise NVL. */ +uint32_t sve_vqm1_for_el_sm(CPUARMState *env, int el, bool sm); + +/* Likewise, but using @sm =3D PSTATE.SM. */ uint32_t sve_vqm1_for_el(CPUARMState *env, int el); =20 static inline bool is_a64(CPUARMState *env) diff --git a/target/arm/helper.c b/target/arm/helper.c index e3f3e4dfc2..b1ca819597 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -6276,23 +6276,41 @@ int sme_exception_el(CPUARMState *env, int el) /* * Given that SVE is enabled, return the vector length for EL. */ -uint32_t sve_vqm1_for_el(CPUARMState *env, int el) +uint32_t sve_vqm1_for_el_sm(CPUARMState *env, int el, bool sm) { ARMCPU *cpu =3D env_archcpu(env); - uint32_t len =3D cpu->sve_max_vq - 1; + uint64_t *cr =3D env->vfp.zcr_el; + uint32_t map =3D cpu->sve_vq.map; + uint32_t len =3D ARM_MAX_VQ - 1; + + if (sm) { + cr =3D env->vfp.smcr_el; + map =3D cpu->sme_vq.map; + } =20 if (el <=3D 1 && !el_is_in_host(env, el)) { - len =3D MIN(len, 0xf & (uint32_t)env->vfp.zcr_el[1]); + len =3D MIN(len, 0xf & (uint32_t)cr[1]); } if (el <=3D 2 && arm_feature(env, ARM_FEATURE_EL2)) { - len =3D MIN(len, 0xf & (uint32_t)env->vfp.zcr_el[2]); + len =3D MIN(len, 0xf & (uint32_t)cr[2]); } if (arm_feature(env, ARM_FEATURE_EL3)) { - len =3D MIN(len, 0xf & (uint32_t)env->vfp.zcr_el[3]); + len =3D MIN(len, 0xf & (uint32_t)cr[3]); } =20 - len =3D 31 - clz32(cpu->sve_vq.map & MAKE_64BIT_MASK(0, len + 1)); - return len; + map &=3D MAKE_64BIT_MASK(0, len + 1); + if (map !=3D 0) { + return 31 - clz32(map); + } + + /* Bit 0 is always set for Normal SVE -- not so for Streaming SVE. */ + assert(sm); + return ctz32(cpu->sme_vq.map); +} + +uint32_t sve_vqm1_for_el(CPUARMState *env, int el) +{ + return sve_vqm1_for_el_sm(env, el, FIELD_EX64(env->svcr, SVCR, SM)); } =20 static void zcr_write(CPUARMState *env, const ARMCPRegInfo *ri, --=20 2.34.1