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GET /api/1.2/patches/2234422/?format=api
{ "id": 2234422, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2234422/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260507160959.449170-11-richard.henderson@linaro.org/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.2/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": "<20260507160959.449170-11-richard.henderson@linaro.org>", "list_archive_url": null, "date": "2026-05-07T16:09:58", "name": "[v3,10/11] 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/1.2/people/72104/?format=api", "name": "Richard Henderson", "email": "richard.henderson@linaro.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260507160959.449170-11-richard.henderson@linaro.org/mbox/", "series": [ { "id": 503213, "url": "http://patchwork.ozlabs.org/api/1.2/series/503213/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=503213", "date": "2026-05-07T16:09:49", "name": "fpu: Export some internals for targets", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/503213/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2234422/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2234422/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=Pvu/T7UZ;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=mail-ot1-x32a.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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Notice the conflict between saturation and rebias_overflow,\nwhich should never happen. 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": [ "v3", "10/11" ] }