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([2602:ae:1598:4c01:35a2:c45d:7485:f488]) by smtp.gmail.com with ESMTPSA id g18-20020a63fa52000000b0051f14839bf3sm9128496pgk.34.2023.05.30.12.00.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); 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=1685473204; x=1688065204; 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=/El1igOUyUSoG0S+vLLpz9bS25VlyGmh7TLbBsNw2Xc=; b=chht9N1XbPQPblAbNhG/IwmPPMBQQKvKDZhFMOLGqnmR+zroer5ARizWudfG3AuyCK PnlY0UpAks5cLT1tVJL7F46x9kL28aNrmC+vRumuLUg4IZ0ry7YzIa10HXYK1iyNWemv kZggcKOIygZ4FlWijujSuA6m/t3DEqZMuHFrj6kP1Gi3ZM9m78nFFX1+zo4PE5E2Rybc lP7wNjxeys1G8Oox50L3THzCNH+9IMli9w0iGtvAiK2vrdpSuZBCrFw3QksnVOjWPl6w v4kKYSL4Scn9V9lQd0O1N4GGytZMBQNSjCvvKNggYVmEkKmBc+JscHRUsbWkvcxmxfGN Y9CA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685473204; x=1688065204; 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=/El1igOUyUSoG0S+vLLpz9bS25VlyGmh7TLbBsNw2Xc=; b=GHL7a//KifbHrUrhNaXBPeXtayhWSxssNzFHTRfgwfBOLBY/8AOhDFnx9Q80f23TS4 1KL8IsidvkBoYNMdRUhL3ypFPYSH0a4ACymNlYZhc38qKIXTw1XMXTneTGbZmTYBIfqc uqfkTk/MTjDGjEF7SdqoJq4OS/ItiTQia2haUhJNzG1gBtwry0rN1dNO7FUI9BtuSUTp GWTi+Fpn0x9+KsbXx45p42pFcw2LXIUDi7hoH7b4KDuIPhSlBkq8IdgXx3SgpZ2KxWJZ +E5ruDSgpeuwGBR2EXbaUpappQw9HnYMNUBkfcyCpzkfqR/WF9jXzanZs+G+08PaXFpN Dy+Q== X-Gm-Message-State: AC+VfDxrpHhJ7rXArLA9HAtyAvB8cMrfrt1p/z1bZRh1MgTPM0WSFKHp SmaKoi8hLasRBxVnPdOadUn7qCa4bft2/5zdIlY= X-Google-Smtp-Source: ACHHUZ6/Uzz96MThTwROgSM96Ij4saxGpEbgDza/9KKIiQ9WSdX2kGhDU3rD8ECMvnUN3XnHJgZvZA== X-Received: by 2002:a05:6a20:4325:b0:10a:e73d:2572 with SMTP id h37-20020a056a20432500b0010ae73d2572mr4349769pzk.3.1685473203766; Tue, 30 May 2023 12:00:03 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Peter Maydell Subject: [PULL 15/27] accel/tcg: Add aarch64 lse2 load_atom_extract_al16_or_al8 Date: Tue, 30 May 2023 11:59:37 -0700 Message-Id: <20230530185949.410208-16-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::433; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x433.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: 1685473252318100001 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- .../aarch64/host/load-extract-al16-al8.h | 40 +++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 host/include/aarch64/host/load-extract-al16-al8.h diff --git a/host/include/aarch64/host/load-extract-al16-al8.h b/host/inclu= de/aarch64/host/load-extract-al16-al8.h new file mode 100644 index 0000000000..bd677c5e26 --- /dev/null +++ b/host/include/aarch64/host/load-extract-al16-al8.h @@ -0,0 +1,40 @@ +/* + * SPDX-License-Identifier: GPL-2.0-or-later + * Atomic extract 64 from 128-bit, AArch64 version. + * + * Copyright (C) 2023 Linaro, Ltd. + */ + +#ifndef AARCH64_LOAD_EXTRACT_AL16_AL8_H +#define AARCH64_LOAD_EXTRACT_AL16_AL8_H + +#include "host/cpuinfo.h" +#include "tcg/debug-assert.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 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; + uint64_t l, h; + + /* + * With FEAT_LSE2, LDP is single-copy atomic if 16-byte aligned + * and single-copy atomic on the parts if 8-byte aligned. + * All we need do is align the pointer mod 8. + */ + tcg_debug_assert(HAVE_ATOMIC128_RO); + asm("ldp %0, %1, %2" : "=3Dr"(l), "=3Dr"(h) : "m"(*ptr_align)); + return (l >> shr) | (h << (-shr & 63)); +} + +#endif /* AARCH64_LOAD_EXTRACT_AL16_AL8_H */ --=20 2.34.1