From patchwork Fri Nov 27 09:22:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Pei X-Patchwork-Id: 1407077 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=libc-alpha-bounces@sourceware.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=loongson.cn Received: from sourceware.org (unknown [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4Cj8Lk0P13z9sSf for ; Fri, 27 Nov 2020 20:23:25 +1100 (AEDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id B9D2B397249F; Fri, 27 Nov 2020 09:23:17 +0000 (GMT) X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by sourceware.org (Postfix) with ESMTP id 40C59397183F for ; Fri, 27 Nov 2020 09:22:55 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 40C59397183F Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=huangpei@loongson.cn Received: from localhost.localdomain (unknown [182.149.161.68]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxf9NlxcBfFHAXAA--.16578S3; Fri, 27 Nov 2020 17:22:51 +0800 (CST) From: Huang Pei To: Joseph Myers Subject: [PATCH 1/3] mips: add hp-timing support for MIPS R2 Date: Fri, 27 Nov 2020 17:22:31 +0800 Message-Id: <20201127092233.29416-2-huangpei@loongson.cn> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201127092233.29416-1-huangpei@loongson.cn> References: <20201127092233.29416-1-huangpei@loongson.cn> X-CM-TRANSID: AQAAf9Dxf9NlxcBfFHAXAA--.16578S3 X-Coremail-Antispam: 1UD129KBjvJXoW7CFW7Gr1UZr4xAFW7CF17ZFb_yoW8Zr43pF 4kCFy5GF4vqrWak3yfAF43GF15tFs5Jr15GF13CFW5Jwn8JFy8XrW2qrW5G34xJFySkrZ7 ZFs7WFWUuFs7ArJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBa14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r1Y6r1xM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY02Avz4vE14v_GFWl42xK82 IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC2 0s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMI IF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF 0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87 Iv6xkF7I0E14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x0JUBmhrUUUUU= X-CM-SenderInfo: xkxd0whshlqz5rrqw2lrqou0/ X-Spam-Status: No, score=-10.6 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, KAM_NUMSUBJECT, KAM_SHORT, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Huacai Chen , Chenghua Xu , libc-alpha Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" MIPS R2 only support 32 bit TSC(AKA "rdhwr %0, $2"), but it should be enough for glibc Signed-off-by: Huang Pei --- sysdeps/mips/hp-timing.h | 43 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 sysdeps/mips/hp-timing.h diff --git a/sysdeps/mips/hp-timing.h b/sysdeps/mips/hp-timing.h new file mode 100644 index 0000000000..128315d0bf --- /dev/null +++ b/sysdeps/mips/hp-timing.h @@ -0,0 +1,43 @@ +/* High precision, low overhead timing functions. MIPS version. + Copyright (C) 2002-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _HP_TIMING_H +#define _HP_TIMING_H 1 + +#if __mips_isa_rev >= 2 +/* We always assume having the timestamp register. */ +#define HP_TIMING_AVAIL (0) +#define HP_SMALL_TIMING_AVAIL (1) + +/* We indeed have inlined functions. */ +#define HP_TIMING_INLINE (1) + +/* We use 32bit values for the times. */ +typedef unsigned int hp_timing_t; + +/* Read the cp0 count, this maybe inaccurate. */ +#define HP_TIMING_NOW(Var) \ + ({ unsigned int _count; \ + asm volatile ("rdhwr\t%0,$2" : "=r" (_count)); \ + (Var) = _count; }) + +#include + +#endif + +#endif /* hp-timing.h */ From patchwork Fri Nov 27 09:22:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Pei X-Patchwork-Id: 1407076 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; 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dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=huangpei@loongson.cn Received: from localhost.localdomain (unknown [182.149.161.68]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxf9NlxcBfFHAXAA--.16578S4; Fri, 27 Nov 2020 17:22:54 +0800 (CST) From: Huang Pei To: Joseph Myers Subject: [PATCH 2/3] mips: make sp 16-byte aligned on N64/N32 Date: Fri, 27 Nov 2020 17:22:32 +0800 Message-Id: <20201127092233.29416-3-huangpei@loongson.cn> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201127092233.29416-1-huangpei@loongson.cn> References: <20201127092233.29416-1-huangpei@loongson.cn> X-CM-TRANSID: AQAAf9Dxf9NlxcBfFHAXAA--.16578S4 X-Coremail-Antispam: 1UD129KBjvdXoWrtF48JF1fXr1rKw1ftw4ruFg_yoWDurc_Gr WFvr18WrW5XrW7Ja4fXryDA34rKw4DXryfZFn2kFn7Wry5JrZY9FnrZrW8ZF1UWFW8GFn8 Jwn5A34rGFWa9jkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbSAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUXwA2048vs2IY02 0Ec7CjxVAFwI0_JFI_Gr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM2 8EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AI xVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20x vE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xv r2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkIecxEwVAFwVW8uwCF04k20x vY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I 3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIx AIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAI cVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2js IEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUh_-PUUUUU= X-CM-SenderInfo: xkxd0whshlqz5rrqw2lrqou0/ X-Spam-Status: No, score=-10.2 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, KAM_NUMSUBJECT, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Huacai Chen , Chenghua Xu , libc-alpha Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" MIPS N64/N32 ABI request stack pointer be 16-byte alinged Signed-off-by: Huang Pei --- sysdeps/unix/sysv/linux/mips/mips64/syscall.S | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/sysdeps/unix/sysv/linux/mips/mips64/syscall.S b/sysdeps/unix/sysv/linux/mips/mips64/syscall.S index a9baff3c17..aab1f389aa 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/syscall.S +++ b/sysdeps/unix/sysv/linux/mips/mips64/syscall.S @@ -27,10 +27,10 @@ .text NESTED (syscall, SZREG, ra) - .mask 0x00010000, -SZREG + .mask 0x00010000, -2 * SZREG .fmask 0x00000000, 0 - PTR_ADDIU sp, -SZREG - cfi_adjust_cfa_offset (SZREG) + PTR_ADDIU sp, -2 * SZREG + cfi_adjust_cfa_offset (2 * SZREG) REG_S s0, (sp) cfi_rel_offset (s0, 0) @@ -48,8 +48,8 @@ NESTED (syscall, SZREG, ra) REG_L s0, (sp) cfi_restore (s0) - PTR_ADDIU sp, SZREG - cfi_adjust_cfa_offset (-SZREG) + PTR_ADDIU sp, 2 * SZREG + cfi_adjust_cfa_offset (-2 * 2 * SZREG) bne a3, zero, L(error) ret From patchwork Fri Nov 27 09:22:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Pei X-Patchwork-Id: 1407078 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=libc-alpha-bounces@sourceware.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=loongson.cn Received: from sourceware.org (unknown [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4Cj8Lr33SDz9sSf for ; Fri, 27 Nov 2020 20:23:32 +1100 (AEDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 8D8EA39724BF; Fri, 27 Nov 2020 09:23:18 +0000 (GMT) X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by sourceware.org (Postfix) with ESMTP id 185663972472 for ; Fri, 27 Nov 2020 09:22:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 185663972472 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=huangpei@loongson.cn Received: from localhost.localdomain (unknown [182.149.161.68]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9Dxf9NlxcBfFHAXAA--.16578S5; Fri, 27 Nov 2020 17:22:54 +0800 (CST) From: Huang Pei To: Joseph Myers Subject: [PATCH 3/3] mips: remove register spill Date: Fri, 27 Nov 2020 17:22:33 +0800 Message-Id: <20201127092233.29416-4-huangpei@loongson.cn> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201127092233.29416-1-huangpei@loongson.cn> References: <20201127092233.29416-1-huangpei@loongson.cn> X-CM-TRANSID: AQAAf9Dxf9NlxcBfFHAXAA--.16578S5 X-Coremail-Antispam: 1UD129KBjvJXoW7Ar4fWw4rAr43tryUKF48JFb_yoW8WF15pr 1fu3WUGrWrJryrCrnxur1UG3Z5Jwn2yr15Zr9I9F4YkrW5ur1rK39IvFyfGFy3tryfGF48 ZF1vgrn0grW5Za7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBS14x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JrWl82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY02Avz4vE14v_GFWl42xK82 IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC2 0s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMI IF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j6F4UMIIF 0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87 Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfU1D73DUUUU X-CM-SenderInfo: xkxd0whshlqz5rrqw2lrqou0/ X-Spam-Status: No, score=-11.1 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Huacai Chen , Chenghua Xu , libc-alpha Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" Before Linux/MIPS 2.6.36, kernel expected setting syscall number(aka "li v0, #sys_number") right precedes "syscall", so the kernel syscall restart sequence can use CP0 EPC - 4 to restart the syscall, because kernel DID NOT save v0 during syscall handling. Linux 2.6.36 canceled this restriction. See sysdeps/unix/sysv/linux/mips/{mips32/sysdep.h,mips64/sysdep.h,sysdep.h} Since glibc-2.24 the minimum kernel version is 3.2(much higer than 2.6.36), I think it is OK to remove the ugly register spill in syscall.S just because the old convention Signed-off-by: Huang Pei --- sysdeps/unix/sysv/linux/mips/mips64/syscall.S | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) diff --git a/sysdeps/unix/sysv/linux/mips/mips64/syscall.S b/sysdeps/unix/sysv/linux/mips/mips64/syscall.S index aab1f389aa..089524a40b 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/syscall.S +++ b/sysdeps/unix/sysv/linux/mips/mips64/syscall.S @@ -27,14 +27,9 @@ .text NESTED (syscall, SZREG, ra) - .mask 0x00010000, -2 * SZREG + .mask 0x00000000, 0 .fmask 0x00000000, 0 - PTR_ADDIU sp, -2 * SZREG - cfi_adjust_cfa_offset (2 * SZREG) - REG_S s0, (sp) - cfi_rel_offset (s0, 0) - - move s0, a0 + move v0, a0 move a0, a1 /* shift arg1 - arg7. */ move a1, a2 move a2, a3 @@ -43,13 +38,8 @@ NESTED (syscall, SZREG, ra) move a5, a6 move a6, a7 - move v0, s0 /* Syscall number -> v0 */ syscall /* Do the system call. */ - REG_L s0, (sp) - cfi_restore (s0) - PTR_ADDIU sp, 2 * SZREG - cfi_adjust_cfa_offset (-2 * 2 * SZREG) bne a3, zero, L(error) ret