From nobody Sun Feb 8 21:33:59 2026 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C702DF6E for ; Fri, 9 Feb 2024 20:50:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707511813; cv=none; b=AqNHTBKtQiiSsNGOBHXUZsdfbufoq2BrCqtOLhbMusqExKitn4Lx2hFFRIH0SL9kzK3XVMbtNaA8W3XMGThdm4VYcDTCGTqx0ggFBFSZLl4eNSlB+2lyUhIX6e6GV3v/ex70i2q5Xum7LLCtHSQoRgNRLTSugD2N+Tek6bB2umQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707511813; c=relaxed/simple; bh=dTqv/ElAR7jF9GPXK0vEBpGKVQd4I2e0pjKYqFqLypE=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Content-Type; b=ER9G97AAdfd+BlGTSdbYymOGHcQdElp3oxE6+nMzRINj+jy6n1+FbqTD/ccdK//NGF29tTedp2fhrP+bPsNuKngqQmMiMfSUGQLg68zrk5Vht5vnSOxwsUnBcSTYMZzVmX6caH2NoUnheVPB+c5boWtStOjUfnsQ8j1LOrBVb5A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=CkryVHF2; arc=none smtp.client-ip=209.85.128.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="CkryVHF2" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-60482420605so20747827b3.3 for ; Fri, 09 Feb 2024 12:50:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1707511811; x=1708116611; darn=vger.kernel.org; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=fMNJNpeOWO5Ji5jMn6B3E094OE7OuzEg0rGAuJgRsjI=; b=CkryVHF2T+fABMveDwIW0pX1m6Jt6eszA1YExxr+Vi+GREEbKypdu2+iXoYH8H+/k9 dJJ56Vfmbl+PQAHxZevvCzchOqeCVDW+uXWDjGzpbTmWTalAdMA8YEd6Cb0spdamrUUy zto7tF8d7KVWGZQZN+xM2DFluk8quqrKdv9pRV0ZTG2xyO4eHYC6x7ggzQgwRpwMv9Lv Nh3dpXsj+mFJXa+en2FNL7HykT2pe2bTDm9Nc1nF1skPmgvaUyMNacNog09K3tK2Oiji KGMgF5fvHUk8UfedHofkYClcKjFzVCh0BHfaYjC6/Xja9EqKKdxF0ENPrD9BulL0u593 QbnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707511811; x=1708116611; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fMNJNpeOWO5Ji5jMn6B3E094OE7OuzEg0rGAuJgRsjI=; b=FE6DaZhGQiOFr5TD/F1ToumeLxNxnS1ngR9tDiuK7qj4WZ8On+I2YYxJOox8U7eChV DuM7+NuRZIbHvqiuTQxydr5zkeikJY65Ixyf7xYx/3Evfj3hWU5IXcZ9eXgvO1qvVsdN F1mtASuZQZSWDHu8QsIvGEnfqCAf7AF8b2TR4z/jJgdy5QaVpYc7dHSS77nZ0+v5DkeH 4wHwnVLyFMkeri7y4LG7qHsVhhia8oPx1CGed1US5H28MBtIPAYRvTDaU89MvbCKq/4K GXjGP+vWuZR4AG8rm2x8mVsBHA7Z+TfDXyx1BRCnfe47sylwCCwZPbZR2Qu1k705dXry q2TQ== X-Gm-Message-State: AOJu0YyGgSvI7w5SBZMa2K1w+kgMnhaGMfb0PJozQ7ztatI3n3g4vSFg B35sUq1ZGBWXBJeWjmqtQOvX477bGBbEqhrFCPRBZ+nE3HhRogCLP6nsyxGjlFBoLTSaqoGp0l4 QKE7hlQ== X-Google-Smtp-Source: AGHT+IESHNgzcmy9Dgs8JyJG8x+qRNOJl7CHBKaOnWWZ6rgcH4i+s+zgGZxx55zQzzsJPt1MajG6rFnGg8iV X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:877:241d:8c35:1c5b]) (user=irogers job=sendgmr) by 2002:a05:6902:1007:b0:dc6:e20f:80cb with SMTP id w7-20020a056902100700b00dc6e20f80cbmr5981ybt.3.1707511811233; Fri, 09 Feb 2024 12:50:11 -0800 (PST) Date: Fri, 9 Feb 2024 12:49:44 -0800 In-Reply-To: <20240209204947.3873294-1-irogers@google.com> Message-Id: <20240209204947.3873294-2-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240209204947.3873294-1-irogers@google.com> X-Mailer: git-send-email 2.43.0.687.g38aa6559b0-goog Subject: [PATCH v1 1/4] perf expr: Allow NaN to be a valid number From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , John Garry , Kan Liang , James Clark , K Prateek Nayak , Kaige Ye , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Currently only floating point numbers can be parsed, add a special case for NaN. Signed-off-by: Ian Rogers --- tools/perf/util/expr.l | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tools/perf/util/expr.l b/tools/perf/util/expr.l index 0feef0726c48..a2fc43159ee9 100644 --- a/tools/perf/util/expr.l +++ b/tools/perf/util/expr.l @@ -94,6 +94,14 @@ static int literal(yyscan_t scanner, const struct expr_s= canner_ctx *sctx) } return LITERAL; } + +static int nan_value(yyscan_t scanner) +{ + YYSTYPE *yylval =3D expr_get_lval(scanner); + + yylval->num =3D NAN; + return NUMBER; +} %} =20 number ([0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+)(e-?[0-9]+)? @@ -115,6 +123,7 @@ else { return ELSE; } source_count { return SOURCE_COUNT; } has_event { return HAS_EVENT; } strcmp_cpuid_str { return STRCMP_CPUID_STR; } +NaN { return nan_value(yyscanner); } {literal} { return literal(yyscanner, sctx); } {number} { return value(yyscanner); } {symbol} { return str(yyscanner, ID, sctx->runtime); } --=20 2.43.0.687.g38aa6559b0-goog