From patchwork Tue May 30 18:59:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 686904 Delivered-To: patch@linaro.org Received: by 2002:a5d:4d8a:0:0:0:0:0 with SMTP id b10csp895154wru; Tue, 30 May 2023 12:05:42 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4oRoGpUTIrdtUAXA4ppcWiaxMoZ6eeiuFKGe1I1qJHv02MnK5VPgMPczihlZdxJBw7WmV8 X-Received: by 2002:a05:6214:e6c:b0:620:a1be:c74d with SMTP id jz12-20020a0562140e6c00b00620a1bec74dmr2923315qvb.37.1685473541782; Tue, 30 May 2023 12:05:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1685473541; cv=none; d=google.com; s=arc-20160816; b=bcfzKW1wocBTP8zhXXY31T8se0avJ+j9fWZ8BiwfD9lorTb3g8RrcB6Z5StI0QSQ30 Ai0/NT14epqy+D9w8XG07HudREptkfPJDQwXboFkU4TtCIS0EqF/pgc3rw2y3ii/bYEl hpCk5ZEvi96qBxFjnE7dlDTL6j2gjHAPQmKckrxycGvYE776FwvGRSsdlmogsszA6hJ5 kEytDYpBEPDH5jrqrzKPE9opeTs3v19M+YRaJKrtbbPrw1Cbv+MHUTHq9FjIh1J6btEv sp3jbUeZiiHY+4CuGUPpgn/evHFOftdJoNuex0JItg2ed3IQDD7o04cHoMUCFiyrgtUv 7pWQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=qyUdvq2txp3LfbtBsPCYA96cHuzMiBnuxS7LlEw8L4A=; b=U4XiSZOZunWoL/eh3DgeFQv9TJcdTiOYqe5sN9FjIRHNvqjMbRTqFVXV5z+x2Xhdnn xjnE0n9Pl1Bu+3kxrFbajgl/Rn7XtBQjM7X08Vkz1j02s0PRURTo3WCwgs4n6U8843dY pq1K7zgRuoH/FB36IwcEm6outcMRKqbzp1IGRJWNuwfqz2zvep+K0tlxEV2LyTS/gDRL W/DgogqlKDUz4XAM7DQjRyc1PeXQ4xpn3c3TprNWd+eURmvdv7bdgMPLJNyj3U9tQ7ze 2OZdysMrVVkZb9D3nWTFZPuYDrEYDf/Dv9M7yPT8Nmtmv5UMB+0N1fHjHIeZpagZCgq8 PfrQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=uqFjunW9; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id pn5-20020a056214130500b00621120c51c2si7228494qvb.591.2023.05.30.12.05.41 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Tue, 30 May 2023 12:05:41 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=uqFjunW9; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org 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) 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-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) 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) 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 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+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org 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/include/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 <= 8. + * + * Load @s bytes from @pv, when pv % s != 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 = (uintptr_t)pv; + __int128_t *ptr_align = (__int128_t *)(pi & ~7); + int shr = (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 that, + * making the branch highly predictable. Otherwise we must use VMOVDQA + * when ptr_align % 16 == 0 for 16-byte atomicity. + */ + if ((cpuinfo & CPUINFO_ATOMIC_VMOVDQU) || (pi & 8)) { + asm("vmovdqu %1, %0" : "=x" (r.i) : "m" (*ptr_align)); + } else { + asm("vmovdqa %1, %0" : "=x" (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 */