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GET /api/patches/2230692/?format=api
{ "id": 2230692, "url": "http://patchwork.ozlabs.org/api/patches/2230692/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430000524.56046-40-richard.henderson@linaro.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "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": "<20260430000524.56046-40-richard.henderson@linaro.org>", "list_archive_url": null, "date": "2026-04-30T00:05:22", "name": "[v2,39/40] fpu: Saturate the exponent in uncanon_normal", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "93e82b32e61d0bce3a9a067154f2fea5c9837440", "submitter": { "id": 72104, "url": "http://patchwork.ozlabs.org/api/people/72104/?format=api", "name": "Richard Henderson", "email": "richard.henderson@linaro.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260430000524.56046-40-richard.henderson@linaro.org/mbox/", "series": [ { "id": 502170, "url": "http://patchwork.ozlabs.org/api/series/502170/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502170", "date": "2026-04-30T00:04:48", "name": "fpu: Export some internals for targets", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502170/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230692/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230692/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "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=mhslQS4L;\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 4g5ZLF3gdqz1yHZ\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 30 Apr 2026 10:09:57 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wIEx8-0003TH-5G; Wed, 29 Apr 2026 20:08:26 -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 <richard.henderson@linaro.org>)\n id 1wIEvl-0008Qh-7Y\n for qemu-devel@nongnu.org; Wed, 29 Apr 2026 20:07:04 -0400", "from mail-pf1-x432.google.com ([2607:f8b0:4864:20::432])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)\n (Exim 4.90_1) (envelope-from <richard.henderson@linaro.org>)\n id 1wIEvj-00020r-Lh\n for qemu-devel@nongnu.org; Wed, 29 Apr 2026 20:07:00 -0400", "by mail-pf1-x432.google.com with SMTP id\n d2e1a72fcca58-82f8b60e54dso219986b3a.2\n for <qemu-devel@nongnu.org>; Wed, 29 Apr 2026 17:06:58 -0700 (PDT)", "from stoup.. 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Otherwise, saturate to INT32_MAX\nand allow the usual overflow to max, infinity, or dnan.\n\nSigned-off-by: Richard Henderson <richard.henderson@linaro.org>\n---\n fpu/softfloat-parts.c.inc | 12 +++++++++++-\n 1 file changed, 11 insertions(+), 1 deletion(-)", "diff": "diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc\nindex 6df98eb5fb..c5a828eb90 100644\n--- a/fpu/softfloat-parts.c.inc\n+++ b/fpu/softfloat-parts.c.inc\n@@ -341,7 +341,17 @@ static void partsN(uncanon_normal)(FloatPartsN *p, float_status *s,\n g_assert_not_reached();\n }\n \n- exp = p->exp + fmt->exp_bias;\n+ /* Because exp_bias is positive, we can only overflow past INT_MAX. */\n+ if (sadd32_overflow(p->exp, fmt->exp_bias, &exp)) {\n+ /*\n+ * rebias_overflow wants to compute a modulo exponent, which\n+ * conflicts with saturation. That said, saturation can only\n+ * happen with scalbn, which is not a PowerPC operation.\n+ */\n+ assert(!s->rebias_overflow);\n+ exp = INT32_MAX;\n+ }\n+\n if (likely(exp > 0)) {\n if (p->frac_lo & round_mask) {\n flags |= float_flag_inexact;\n", "prefixes": [ "v2", "39/40" ] }