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Mon, 11 Mar 2024 11:08:51 -0700 (PDT) From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com, bmeng@tinylab.org, liwei1518@gmail.com, zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com, philmd@linaro.org, richard.henderson@linaro.org, Daniel Henrique Barboza Subject: [PATCH v12 7/7] target/riscv/vector_helper.c: optimize loops in ldst helpers Date: Mon, 11 Mar 2024 15:08:21 -0300 Message-ID: <20240311180821.250469-8-dbarboza@ventanamicro.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240311180821.250469-1-dbarboza@ventanamicro.com> References: <20240311180821.250469-1-dbarboza@ventanamicro.com> 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::532; envelope-from=dbarboza@ventanamicro.com; helo=mail-pg1-x532.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, T_SCC_BODY_TEXT_LINE=-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-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ventanamicro.com) X-ZM-MESSAGEID: 1710180608477100003 Content-Type: text/plain; charset="utf-8" Change the for loops in ldst helpers to do a single increment in the counter, and assign it env->vstart, to avoid re-reading from vstart every time. Suggested-by: Richard Henderson Signed-off-by: Daniel Henrique Barboza Reviewed-by: Alistair Francis Reviewed-by: Richard Henderson --- target/riscv/vector_helper.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c index b4360dbd52..712a2ee4dd 100644 --- a/target/riscv/vector_helper.c +++ b/target/riscv/vector_helper.c @@ -209,7 +209,7 @@ vext_ldst_stride(void *vd, void *v0, target_ulong base, =20 VSTART_CHECK_EARLY_EXIT(env); =20 - for (i =3D env->vstart; i < env->vl; i++, env->vstart++) { + for (i =3D env->vstart; i < env->vl; env->vstart =3D ++i) { k =3D 0; while (k < nf) { if (!vm && !vext_elem_mask(v0, i)) { @@ -277,7 +277,7 @@ vext_ldst_us(void *vd, target_ulong base, CPURISCVState= *env, uint32_t desc, VSTART_CHECK_EARLY_EXIT(env); =20 /* load bytes from guest memory */ - for (i =3D env->vstart; i < evl; i++, env->vstart++) { + for (i =3D env->vstart; i < evl; env->vstart =3D ++i) { k =3D 0; while (k < nf) { target_ulong addr =3D base + ((i * nf + k) << log2_esz); @@ -393,7 +393,7 @@ vext_ldst_index(void *vd, void *v0, target_ulong base, VSTART_CHECK_EARLY_EXIT(env); =20 /* load bytes from guest memory */ - for (i =3D env->vstart; i < env->vl; i++, env->vstart++) { + for (i =3D env->vstart; i < env->vl; env->vstart =3D ++i) { k =3D 0; while (k < nf) { if (!vm && !vext_elem_mask(v0, i)) { --=20 2.43.2