From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtpbg153.qq.com (smtpbg153.qq.com [13.245.218.24]) by sourceware.org (Postfix) with ESMTPS id CD14E3858D38 for ; Tue, 13 Jun 2023 02:26:22 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CD14E3858D38 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=rivai.ai Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=rivai.ai X-QQ-mid: bizesmtp88t1686623174t5z11kzy Received: from rios-cad5.localdomain ( [58.60.1.11]) by bizesmtp.qq.com (ESMTP) with id ; Tue, 13 Jun 2023 10:26:12 +0800 (CST) X-QQ-SSF: 01400000000000F0S000000A0000000 X-QQ-FEAT: ILHsT53NKPhzQSpgiKFKKZNzTpVfiHpwGqe428rVCdvybjQ1moFG163FX+Jqj Hr2kGGZziXdWBmYhJZQ031yOZExeqsFmG6cOAl4MBsfPfo2X2NsGTq1MH8PuJzze//5rafk E73K1xRc1TJ0Mi3f+RRj7djfko6we0Rw37rObbEoFJuBfgJfJWhx16Hy18Q5pJoteTJTKzc /+YW1GuwyIvjB7leLrM9KWWbAb/XcCsBiyCkDM1q/3/bCTATVO+X923s94bOGS9tLB1gTtg cZECL3ecwi2wzTpvIF5TJ2hwMSuoA2v7UdvRnFFsWiqhjc7bKfZRe3fJr5SKDtya0sP8Y33 Q6GaDbjMPBXeCOZMx/sCKpb4polzheVrJfvOkk8pnLpczkhe+T/wt33U2XjrgY7UYLRecVS X-QQ-GoodBg: 2 X-BIZMAIL-ID: 7270065862093572498 From: juzhe.zhong@rivai.ai To: gcc-patches@gcc.gnu.org Cc: kito.cheng@gmail.com, kito.cheng@sifive.com, palmer@dabbelt.com, palmer@rivosinc.com, jeffreyalaw@gmail.com, rdapp.gcc@gmail.com, Juzhe-Zhong Subject: [PATCH] RISC-V: Add comments of some functions Date: Tue, 13 Jun 2023 10:26:11 +0800 Message-Id: <20230613022611.2189297-1-juzhe.zhong@rivai.ai> X-Mailer: git-send-email 2.36.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:rivai.ai:qybglogicsvrgz:qybglogicsvrgz7a-one-0 X-Spam-Status: No, score=-12.1 required=5.0 tests=BAYES_00,GIT_PATCH_0,KAM_DMARC_STATUS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: From: Juzhe-Zhong gcc/ChangeLog: * config/riscv/riscv-v.cc (rvv_builder::single_step_npatterns_p): Add comment. (shuffle_generic_patterns): Ditto. (expand_vec_perm_const_1): Ditto. --- gcc/config/riscv/riscv-v.cc | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc index fb970344521..3ce2eb7f2ad 100644 --- a/gcc/config/riscv/riscv-v.cc +++ b/gcc/config/riscv/riscv-v.cc @@ -457,6 +457,9 @@ rvv_builder::single_step_npatterns_p () const { 2, 2, 2, 2, 4, 4, 4, 4, 8, 8, 8, 8, 16, 16, 16, 16, ... } E.g. NPATTERNS = 8: { 2, 2, 2, 2, 2, 2, 2, 2, 8, 8, 8, 8, 8, 8, 8, 8, ... } + We only check ele[0] ~ ele[NPATTERNS - 1] whether they are the same. + We don't need to check the elements[n] with n >= NPATTERNS since + they don't belong to the same pattern. */ bool rvv_builder::npatterns_all_equal_p () const @@ -2478,6 +2481,8 @@ shuffle_generic_patterns (struct expand_vec_perm_d *d) return true; } +/* This function recognizes and supports different permutation patterns + and enable VLA SLP auto-vectorization. */ static bool expand_vec_perm_const_1 (struct expand_vec_perm_d *d) { @@ -2509,6 +2514,8 @@ expand_vec_perm_const_1 (struct expand_vec_perm_d *d) return false; } +/* This function implements TARGET_VECTORIZE_VEC_PERM_CONST by using RVV + * instructions. */ bool expand_vec_perm_const (machine_mode vmode, machine_mode op_mode, rtx target, rtx op0, rtx op1, const vec_perm_indices &sel) -- 2.36.3