{"id":2234651,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2234651/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260507234413.643512-40-richard.henderson@linaro.org/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.2/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260507234413.643512-40-richard.henderson@linaro.org>","list_archive_url":null,"date":"2026-05-07T23:43:52","name":"[v4,39/60] target/arm: Enable FEAT_FP8 for -cpu max","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"cf7f085f43e9a48a6807c87c1a92d2ddc3a3f304","submitter":{"id":72104,"url":"http://patchwork.ozlabs.org/api/1.2/people/72104/?format=json","name":"Richard Henderson","email":"richard.henderson@linaro.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260507234413.643512-40-richard.henderson@linaro.org/mbox/","series":[{"id":503296,"url":"http://patchwork.ozlabs.org/api/1.2/series/503296/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=503296","date":"2026-05-07T23:43:14","name":"target/arm: Implement FEAT_FP8","version":4,"mbox":"http://patchwork.ozlabs.org/series/503296/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2234651/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2234651/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256\n header.s=google header.b=Dv3IdSY1;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4gBTRm1bcnz1yK7\n\tfor ; Fri, 08 May 2026 09:46:44 +1000 (AEST)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1wL8Op-0000oy-DS; Thu, 07 May 2026 19:44:59 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1wL8Ol-0000k2-QR\n for qemu-devel@nongnu.org; Thu, 07 May 2026 19:44:55 -0400","from mail-ot1-x32c.google.com ([2607:f8b0:4864:20::32c])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from )\n id 1wL8Ok-0001EE-1q\n for qemu-devel@nongnu.org; Thu, 07 May 2026 19:44:55 -0400","by mail-ot1-x32c.google.com with SMTP id\n 46e09a7af769-7d55b97f358so999020a34.3\n for ; Thu, 07 May 2026 16:44:53 -0700 (PDT)","from stoup.attlocal.net ([2600:381:c938:6375:9641:bbb2:a93a:bb4c])\n by smtp.gmail.com with ESMTPSA id\n 46e09a7af769-7e367d8feb1sm84320a34.23.2026.05.07.16.44.51\n (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n Thu, 07 May 2026 16:44:52 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=linaro.org; s=google; t=1778197492; x=1778802292; darn=nongnu.org;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:from:to:cc:subject:date\n :message-id:reply-to;\n bh=nTIDtuillPXckV86mcaM2Utf4vRJVw8yqCVUR2w2Jkg=;\n b=Dv3IdSY1k5/NR0ykl6Ia41r6byNzzT5aL0yGJHZSDx5jA9BGp6UI9hpmxQCPCYwybU\n rBE+1ZSbPvWzGa6+ec4qER2JhChjoDsutPY0RXotw9mcpWubKh2fh/D4zk8JF5LVrD26\n Pv/+uofnEPq4PpDuRsckYVvFL7jg+1ub4Xt7AJUlZjQFAZ1B/8T0Bv7ugFVdWWiddmK2\n AjTvl57bqF9d/iViItsvxT+kZS7PPGSKsvOhUDopMsZ50ORkDIHnej/5u+1ITcc/jI4h\n pa2CemODpu2BfjLwaoUzAIqTBy/C88gDj+iaLe/BLeP+9HpZw9lkfFkkcbLii4xaB9s5\n TKZw==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=1e100.net; s=20251104; t=1778197492; x=1778802292;\n h=content-transfer-encoding:mime-version:references:in-reply-to\n :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from\n :to:cc:subject:date:message-id:reply-to;\n bh=nTIDtuillPXckV86mcaM2Utf4vRJVw8yqCVUR2w2Jkg=;\n b=HZYN6Tj/Dy07Y8HldtUJVTJIY7KFl+c4LFWIcMjYrna3ppTKdEq4a5AtOLsBcgT3R9\n vfLn0ueyi6YRVGq4sozbIgc8xGsEUhlSX4nvHFpzeaSCE+mcvkYJI/S3M6UFlhjeo9G4\n Nyf+1FGs8GlzKpzLz5fwTx/kHSzTP/SeoMsdk9Ar7lfDL2kxJdDZFnaoxyXKjyKMUj6K\n /Sm0JQbgxl9U6ujmAo4cPbLl66OpPyinig6ZyOgnW61pv8JmMs7vB7ujCgoSlptbWEls\n s95NkbxyHz6Y+ws2rJPTVv7+ocQBNEZHmyno28hFEWcZyEv20MuG6ZSPZqQNDO9bWtUW\n 6x/g==","X-Gm-Message-State":"AOJu0Yz0l2pAo5qyLP22CcRTLyT7MPMLMGszx0rq1Ay839yQyo9LnYxz\n AX5Hn4pT4n+tqszywD4FUVtUJ9bGN2n8Hj6QKDkmZeyHvooYMbVy52V157d0SeNZfLqV0U8OuYI\n gyZXu","X-Gm-Gg":"AeBDievBUf1J6thO1lT8j/bLhxEIKf9PgC8hADd7l7Onem0/s6gYaw0y2axVc8NK20o\n WwJbf4FdAzdZbZUtQCZh6uDMiBdyz0toyWg35a3DObvWr6Kda7EFKEMMfgQbv2xtOr46DKY1u/N\n BhrIzCzBebXp4wz1kLsfzXfWKsrxYeXnlgrdNNQQGUlPT0QBK/myCnuvFOe4ETRVNyOohYdXpSR\n z81P5gSeR3Il/xXek8R/NnxIhsZC+diH72DSiTPyjQt+iRJK2+BVzUGIF3zlXtiCUr3dDXSgOaV\n 1PhOYfbaV5smJDrBVithC1CwHJ9xLVUfgEPP6nHl4TxL4mIHEttVPcVCidbVHF+NGeMpdM/4s8K\n a/cQzJccx2FoFhj+zQBW6hm/9DX2OXh+kFs+eKr7Ebr2ItnMNHk05opcHpZfOEum7CtWAsCsuEE\n 8tDl5RfWNi2qAt/Lvo8Tqr8tWavS998oXVMLUUAHkFTtNvFQ==","X-Received":"by 2002:a05:6830:82e5:b0:7dc:d951:9766 with SMTP id\n 46e09a7af769-7e1df20c283mr7010220a34.28.1778197492434;\n Thu, 07 May 2026 16:44:52 -0700 (PDT)","From":"Richard Henderson ","To":"qemu-devel@nongnu.org","Cc":"qemu-arm@nongnu.org","Subject":"[PATCH v4 39/60] target/arm: Enable FEAT_FP8 for -cpu max","Date":"Thu, 7 May 2026 18:43:52 -0500","Message-ID":"<20260507234413.643512-40-richard.henderson@linaro.org>","X-Mailer":"git-send-email 2.43.0","In-Reply-To":"<20260507234413.643512-1-richard.henderson@linaro.org>","References":"<20260507234413.643512-1-richard.henderson@linaro.org>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Received-SPF":"pass client-ip=2607:f8b0:4864:20::32c;\n envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x32c.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,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n 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":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Signed-off-by: Richard Henderson \n---\n target/arm/tcg/cpu64.c | 6 ++++++\n docs/system/arm/emulation.rst | 1 +\n 2 files changed, 7 insertions(+)","diff":"diff --git a/target/arm/tcg/cpu64.c b/target/arm/tcg/cpu64.c\nindex bc866c5a67..8d0c057902 100644\n--- a/target/arm/tcg/cpu64.c\n+++ b/target/arm/tcg/cpu64.c\n@@ -1391,6 +1391,12 @@ void aarch64_max_tcg_initfn(Object *obj)\n t = FIELD_DP64(t, ID_AA64SMFR0, FA64, 1); /* FEAT_SME_FA64 */\n SET_IDREG(isar, ID_AA64SMFR0, t);\n \n+ t = GET_IDREG(isar, ID_AA64FPFR0);\n+ t = FIELD_DP64(t, ID_AA64FPFR0, F8E5M2, 1); /* FEAT_FP8 */\n+ t = FIELD_DP64(t, ID_AA64FPFR0, F8E4M3, 1); /* FEAT_FP8 */\n+ t = FIELD_DP64(t, ID_AA64FPFR0, F8CVT, 1); /* FEAT_FP8 */\n+ SET_IDREG(isar, ID_AA64FPFR0, t);\n+\n /* Replicate the same data to the 32-bit id registers. */\n aa32_max_features(cpu);\n \ndiff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst\nindex cf8771d541..b6f0ca9351 100644\n--- a/docs/system/arm/emulation.rst\n+++ b/docs/system/arm/emulation.rst\n@@ -74,6 +74,7 @@ the following architecture extensions:\n - FEAT_FHM (Floating-point half-precision multiplication instructions)\n - FEAT_FP (Floating Point extensions)\n - FEAT_FP16 (Half-precision floating-point data processing)\n+- FEAT_FP8 (FP8 convert instructions)\n - FEAT_FPAC (Faulting on AUT* instructions)\n - FEAT_FPACCOMBINE (Faulting on combined pointer authentication instructions)\n - FEAT_FPACC_SPEC (Speculative behavior of combined pointer authentication instructions)\n","prefixes":["v4","39/60"]}