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[88.187.86.199]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4801fe2c2a2sm63720935e9.10.2026.01.18.11.35.37 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 18 Jan 2026 11:35:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1768764939; x=1769369739; darn=nongnu.org; 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=rCCB9HNX1wAOtME2z2I9ds2IWShnOrLBot6ZnveN7zw=; b=ts9LNirTqncer6PF8MDXAW5GtSEEKnQZSEN/csON6EujCtXPJ6SCY8B+vvF0ryLCf5 rKYXxjjWo9540rRAvUrcBHPkSGGtW5FyHefHWhQa83jCTS4JThLBrpNJ5ViHtnZvwzIc Q+o0yx+fj5xENXRHRSOziEQlPWLm3KLG5XZjj4J6IzcYmk125N0GQnbZ6wiKEFr+R8qH 34p5z4EbrxOMb7xx3kNOGJEwx4U2i3A3Y95I0aEYpMCdPcOl+Sm6PEx89z+wBgmr1fPu XJnR4VwJ862zCGaZxiEQv9TXCE4i06dNS5TsiFoS5NSIsfclrWjl8JhLc8Skjn4nKQMI x7aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768764939; x=1769369739; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=rCCB9HNX1wAOtME2z2I9ds2IWShnOrLBot6ZnveN7zw=; b=uVnba1RrO6ZZ/kWIj8BTz+vTcozxs63L5v9vGgoStwlJYkFCCV/c1ibH2+naaPVgVo fhXBlVBCrwFPTTB7juD9zwP2LUIiicsRM+3NLfqjZv4VkJF3CsDIQ5J3hFRNLyHL/FQA cH+wKztz+PDOsDgDVmQ9kVcEDLMucQaBrY9XDTvVHAC7tngZ4N66RzaHGPWEokfMkfi0 2Didxk0/6xBbgm/K2zO76jnyeWJ98WHbuVv+yoGa5FgZEG8LYnsqijWFBHid4c2+nB65 CtKwwmIHbUl8Sth1/R2xv9VP0z85xYauMCOa8K6vKhBRu927XwCN34fblmTOYLiaCDsL V7mg== X-Gm-Message-State: AOJu0Yx6Y84u3Jq/w8NNMy41AGD20bAbxMbEmNAULyydtcXsamwNR6Kk SpBLldX3snEOfkBPqZUozI6nIG5LjZBB+QUFe4kAYuWmF5AlID/JoLisAN/4Ac395KawA+nti2V NCcjDbM0= X-Gm-Gg: AY/fxX5gLXlU8k8mYcblwvMh7+estVhgHhOivfLGgU3kBS7FNRId8caXc1/Yw4+NBGs ck3yP7hOvejFvQli44X6n//JFghZ4PfPMkk2JUt/vdd2oslyFo40jPbPHDiyLbdUszzngq90p9X 6W9gXceRlkbeNEWUvMD1Pr0KECsqQvHxG4ux9WWXSXj0OrWrrcjAPUICiGb1XDBQ6z+xJ4yRdga 2C7G6vrzWV8jS+njPqZ6hoiCBKBxNq9YK6HYD/U2Jg7CpwDB4i+V/o+vbGzxMrG2UKmLjnMxGXl G5FQcOWhn5ESliN250EkHL0QbvR9sqrcls0aXLUQR10YOIsMdVlUmm77jlOuyN19ivG3FGPoN3d oL1M1wD6LwZe92nHhwAOR3ElvdqbEVo74TgUIkX+KJlbaz/tQLsHg5ugpDg1m4USbvu2bpz2GwE NjCcG7TLnmPPKzDkcfrNwDyARUhly5bUFTSY/t3+doI/xuXUef7a8glwII3xkigBx2DQTngdg= X-Received: by 2002:a05:600c:8b2f:b0:477:7f4a:44b0 with SMTP id 5b1f17b1804b1-4801e34f952mr101625605e9.33.1768764939062; Sun, 18 Jan 2026 11:35:39 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Peter Xu , Paolo Bonzini , Richard Henderson , Anton Johansson , Manos Pitsidianakis , Pierrick Bouvier Subject: [PATCH v6 04/18] system/memory: Introduce ldm_p() and stm_p() load/store helpers Date: Sun, 18 Jan 2026 20:34:54 +0100 Message-ID: <20260118193509.42923-5-philmd@linaro.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260118193509.42923-1-philmd@linaro.org> References: <20260118193509.42923-1-philmd@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 (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=2a00:1450:4864:20::330; envelope-from=philmd@linaro.org; helo=mail-wm1-x330.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 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: qemu development 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: 1768765034875158500 Introduce load/store helpers which take a MemOp argument. Inspired-by: Paolo Bonzini Suggested-by: Richard Henderson Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Richard Henderson --- Possible optimization: https://lore.kernel.org/qemu-devel/546f3a4b-64ff-4f63-bb07-f5cb52b6c64c@red= hat.com/ --- include/qemu/bswap.h | 72 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h index 65a1b3634f4..387d65c0b0b 100644 --- a/include/qemu/bswap.h +++ b/include/qemu/bswap.h @@ -2,6 +2,7 @@ #define BSWAP_H =20 #include "qemu/target-info.h" +#include "exec/memop.h" =20 #undef bswap16 #define bswap16(_x) __builtin_bswap16(_x) @@ -375,6 +376,77 @@ static inline void stq_be_p(void *ptr, uint64_t v) stq_he_p(ptr, be_bswap(v, 64)); } =20 + +/** + * ldm_p: Load value from host memory (byteswapping if necessary) + * + * @ptr: the host pointer to be accessed + * @mop: #MemOp mask containing access size and optional byteswapping + * + * Convert the value stored at @ptr in host memory and byteswap if necessa= ry. + * + * Returns: the converted value. + */ +static inline uint64_t ldm_p(const void *ptr, MemOp mop) +{ + switch (mop & (MO_SIZE | MO_BSWAP)) { + case MO_8: + return ldub_p(ptr); + case MO_16 | MO_LE: + return lduw_le_p(ptr); + case MO_16 | MO_BE: + return lduw_be_p(ptr); + case MO_32 | MO_LE: + return ldl_le_p(ptr); + case MO_32 | MO_BE: + return ldl_be_p(ptr); + case MO_64 | MO_LE: + return ldq_le_p(ptr); + case MO_64 | MO_BE: + return ldq_be_p(ptr); + default: + g_assert_not_reached(); + } +} + +/** + * stm_p: Store value to host memory (byteswapping if necessary) + * + * @ptr: the host pointer to be accessed + * @mop: #MemOp mask containing access size and optional byteswapping + * @val: the value to store + * + * Convert the value (byteswap if necessary) and store at @ptr in host mem= ory. + */ +static inline void stm_p(void *ptr, MemOp mop, uint64_t val) +{ + switch (mop & (MO_SIZE | MO_BSWAP)) { + case MO_8: + stb_p(ptr, val); + break; + case MO_16 | MO_LE: + stw_le_p(ptr, val); + break; + case MO_16 | MO_BE: + stw_be_p(ptr, val); + break; + case MO_32 | MO_LE: + stl_le_p(ptr, val); + break; + case MO_32 | MO_BE: + stl_be_p(ptr, val); + break; + case MO_64 | MO_LE: + stq_le_p(ptr, val); + break; + case MO_64 | MO_BE: + stq_be_p(ptr, val); + break; + default: + g_assert_not_reached(); + } +} + /* Store v to p as a sz byte value in host order */ #define DO_STN_LDN_P(END) \ static inline void stn_## END ## _p(void *ptr, int sz, uint64_t v) \ --=20 2.52.0