From nobody Tue Apr 15 04:18:47 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1685473541; cv=none; d=zohomail.com; s=zohoarc; b=jexx8HOVbjzcXXWtD17jWbExhHmsyCPXyZoGLNGVooxrKSzWcL/ieuSVyhDUy/RlEL2hkswVsQ8W9H78pwSnYTJzpyEdQIJzUtTgfqbgsz7tMsxrATb3OBBPum1kmB1RRTbuKiFHZ8BrSJCyx8irnUeyJqsFhmvmuEqqWkr161A= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1685473541; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=qyUdvq2txp3LfbtBsPCYA96cHuzMiBnuxS7LlEw8L4A=; b=Q35x/UfiDTwKCKoxmllwf0oAP6dpjeYZoIGi0Kc9mesbUfUeez9ZfwAMrXbxTDBp2NNv6kyM/R+aqWqAqJb8QiVDB9HUq2eX4YRLX/zmNrUZ7TwTgsvrmSMtDujxh13RRW9C9NtySBKVDuXCUokEcmryYq6JwfPVCFA/B2goSzA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1685473541574455.90671071167753; Tue, 30 May 2023 12:05:41 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1q44Zz-0000ut-37; Tue, 30 May 2023 15:00:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1q44Zj-0000pw-HS for qemu-devel@nongnu.org; Tue, 30 May 2023 15:00:11 -0400 Received: from mail-pf1-x42f.google.com ([2607:f8b0:4864:20::42f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1q44Zh-0000sl-QQ for qemu-devel@nongnu.org; Tue, 30 May 2023 15:00:07 -0400 Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-64d5b4c400fso5417090b3a.1 for ; Tue, 30 May 2023 12:00:03 -0700 (PDT) Received: from stoup.. ([2602:ae:1598:4c01:35a2:c45d:7485:f488]) by smtp.gmail.com with ESMTPSA id g18-20020a63fa52000000b0051f14839bf3sm9128496pgk.34.2023.05.30.12.00.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 May 2023 12:00:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1685473203; x=1688065203; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=qyUdvq2txp3LfbtBsPCYA96cHuzMiBnuxS7LlEw8L4A=; b=uqFjunW9OFf7U88IwZYG8zxebXq+sjVUcQ12wAl2hTaHxbUwwQ3mxQLPtSnWvADBl0 KSqkiixwAYzLMnzl7gm73vk8VQBZ8/7culG/e4SA1JaLWHLFDsfCtZVRz74T/c2LOT08 ebuHg+Fm3fGEMYYqnKw8Qa/A7UnstarU4r2ieHx6+semlpwQ7fyl+v7wE9Coy1onYZxC 35YgSE3hxd8jB7AnA4mdLfR4LTrw/ZGV/354Uv1qbnEYE3Jo6CXe+rCgcQ5q5ey5XSy1 moM3jlHia9ZX4KoEKllR/dJYWH89j0EQhNbi/L8RwyOEVaI7I4QxzPe+Kybylj8IGjZC N24Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685473203; x=1688065203; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qyUdvq2txp3LfbtBsPCYA96cHuzMiBnuxS7LlEw8L4A=; b=E3vPDv1Dq7lh1wD3gIol2zkwC38NsYU7BEjh7FLGmsBiOlvPUioHHHN7I3/IdEVUN4 hUCK8jxDlv6L5TVwn2H3LlRLkmlBysDYy1TOGFynjR7CqbbWefyeddTOpgqm28vWzwsH UQFblO/TOAKlIi2Aev3lHZ2QX7IiNJ0kPf479r6qStFgt2Gklsa0cRQrApJZnF4JRYoN VjCV+m3OXrlHm/s427V6S27NM8ctX4Cn13Ua9eQy/9M3KzWrEAQZ6lH4M0yOPSe+7kTG vOhGTix0+qn92Y0dwIRDDdy8xEEe2k+Nw67xwL0mKKWybhWFINnOHPDu6XDm77WT5Hgu wPTg== X-Gm-Message-State: AC+VfDzHprNcYMpH+6EO/Iv9A5mPnCZSKvd49FXwtDIjMEcp/VoVIGZ5 Vp6R3d9/As12XFTnNnRt7zP4EtF1U285S/EujNw= X-Google-Smtp-Source: ACHHUZ5v+JqG9GBAjbFXTZSno8QAu+PTgwBOltdkDqMZzsF6oQgaa5cju5kfDlijtXxw66WnOjidKQ== X-Received: by 2002:a05:6a21:998c:b0:10c:37ed:3e88 with SMTP id ve12-20020a056a21998c00b0010c37ed3e88mr3538235pzb.23.1685473202907; Tue, 30 May 2023 12:00:02 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Peter Maydell Subject: [PULL 14/27] accel/tcg: Add x86_64 load_atom_extract_al16_or_al8 Date: Tue, 30 May 2023 11:59:36 -0700 Message-Id: <20230530185949.410208-15-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230530185949.410208-1-richard.henderson@linaro.org> References: <20230530185949.410208-1-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::42f; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42f.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=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: 1685473543311100003 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- .../x86_64/host/load-extract-al16-al8.h | 50 +++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 host/include/x86_64/host/load-extract-al16-al8.h diff --git a/host/include/x86_64/host/load-extract-al16-al8.h b/host/includ= e/x86_64/host/load-extract-al16-al8.h new file mode 100644 index 0000000000..31b6fe8c45 --- /dev/null +++ b/host/include/x86_64/host/load-extract-al16-al8.h @@ -0,0 +1,50 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Atomic extract 64 from 128-bit, x86_64 version. + * + * Copyright (C) 2023 Linaro, Ltd. + */ + +#ifndef X86_64_LOAD_EXTRACT_AL16_AL8_H +#define X86_64_LOAD_EXTRACT_AL16_AL8_H + +#ifdef CONFIG_INT128_TYPE +#include "host/cpuinfo.h" + +/** + * load_atom_extract_al16_or_al8: + * @pv: host address + * @s: object size in bytes, @s <=3D 8. + * + * Load @s bytes from @pv, when pv % s !=3D 0. If [p, p+s-1] does not + * cross an 16-byte boundary then the access must be 16-byte atomic, + * otherwise the access must be 8-byte atomic. + */ +static inline uint64_t ATTRIBUTE_ATOMIC128_OPT +load_atom_extract_al16_or_al8(void *pv, int s) +{ + uintptr_t pi =3D (uintptr_t)pv; + __int128_t *ptr_align =3D (__int128_t *)(pi & ~7); + int shr =3D (pi & 7) * 8; + Int128Alias r; + + /* + * ptr_align % 16 is now only 0 or 8. + * If the host supports atomic loads with VMOVDQU, then always use tha= t, + * making the branch highly predictable. Otherwise we must use VMOVDQA + * when ptr_align % 16 =3D=3D 0 for 16-byte atomicity. + */ + if ((cpuinfo & CPUINFO_ATOMIC_VMOVDQU) || (pi & 8)) { + asm("vmovdqu %1, %0" : "=3Dx" (r.i) : "m" (*ptr_align)); + } else { + asm("vmovdqa %1, %0" : "=3Dx" (r.i) : "m" (*ptr_align)); + } + return int128_getlo(int128_urshift(r.s, shr)); +} +#else +/* Fallback definition that must be optimized away, or error. */ +uint64_t QEMU_ERROR("unsupported atomic") + load_atom_extract_al16_or_al8(void *pv, int s); +#endif + +#endif /* X86_64_LOAD_EXTRACT_AL16_AL8_H */ --=20 2.34.1