From nobody Wed Aug 26 17:58:31 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1779297723; cv=none; d=zohomail.com; s=zohoarc; b=JlKMPkpEfNZw8vHL88WohfdRYhbULKN4NRFvB7T5s9LQ/fKCSjtwEtrd0hmsAv5stCU1B/3fxSMZ+hkeAKkRFkaHBcyhECSB6Jt/BnEGCISBPHAF3Hx4joHueToUVmlghSSpV6YjRiy+5jcXpBLf77OuhHiRErBFGWetHLdbToU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1779297723; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=EzAkNYIqBiG4Wda0W3Zwd2nFVh/tHZDJYFGGvFPNoqQ=; b=Nu3LUJbYyOwwmTWMjOAYPOaJV8S6nXeKcS2nHjNTEpO26rgVuUvRCCWLmCjFFYcuY6TH6Lo0MbO7ySddkpPJh5FvEpFgKEbeLOQYWYi2whLJMUv3MauX/WwAgXvuZ/i3QcNeH79sTztyijTSLxFpI6q1VdzZJjFlFZyO6jIZ+s0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1779297723205655.8022550872485; Wed, 20 May 2026 10:22:03 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1wPkZX-0001me-18; Wed, 20 May 2026 13:19:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1wPkZF-0001aW-7v for qemu-devel@nongnu.org; Wed, 20 May 2026 13:18:49 -0400 Received: from mail-pj1-x1031.google.com ([2607:f8b0:4864:20::1031]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1wPkZ9-00021F-0I for qemu-devel@nongnu.org; Wed, 20 May 2026 13:18:48 -0400 Received: by mail-pj1-x1031.google.com with SMTP id 98e67ed59e1d1-367c2a39fcfso2420363a91.3 for ; Wed, 20 May 2026 10:18:42 -0700 (PDT) Received: from stoup.. ([71.212.142.33]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36a3c83f226sm254416a91.0.2026.05.20.10.18.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 May 2026 10:18:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1779297522; x=1779902322; 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=EzAkNYIqBiG4Wda0W3Zwd2nFVh/tHZDJYFGGvFPNoqQ=; b=U7MuupXA4CIB0D2mYCxaDgc1ZpyDtd1gg01KVrErPLaSrHg9LiXMmJv+NWzgjLnOHc gPjJp6nsOjx0hDtqbojKwn+k7BQtk+kcHQ59xQdTlUiH+/pBb7L55A66Yd4rUcqnv6ad YJXlkWuZJ4QcfVy7SAPNWdJcd0sGRkhdJ4VM1023AmFraZrZkqQsN7OlwAUh8V5fX+k5 CH434JIrdoYiTlQQZ/p+QnvHKBO2i4TK3x5APxhOxzgI4/V12dYscpn6PqUbgW+d3RaI 3ZlLkI34nRunCBEQiN/q1Sw3Gx9ckmBz7qaC/vPxrHQ9HDoYGhoqpu4faFQx+oD6/Eyl UbGQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779297522; x=1779902322; 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=EzAkNYIqBiG4Wda0W3Zwd2nFVh/tHZDJYFGGvFPNoqQ=; b=nMCQ9ZG1Feyo0FyyBXW43WGZnVuPpJUVW+MSZfQKWIWiGPrX4osvWfUyAYCCfsKO3M fpPi6IpAdd+KCzZKx+4W8LX6w6FPFlHkuMX9YZm+hlATBo2AC6YMhZ1oSVugb4QR+jEj 4C5Og6L9K8ySBlo6ypyV6+vl+HYoLCUKQEJIZecnfNb8og2bDCjH+DSu7GGQWAIdVFdT GWDsNhYlFcwWygx2+2AKte4eRHfVPlGM0/nLhT5mOKJVpUcGJmXg3mJ6oOSBDneQuouH KeHUZ3OrCjWlAtg1ETZOAhDdQQUbuq3deOnGW+3dYvSGJygwkS+yvhKB8t3pFKUQQp5y VkDw== X-Gm-Message-State: AOJu0Yzr7BaZXKaOSuyMe7QDbHLL5fmfoqgBpfMjOxet2fUW1b+hiiDc /zJul8PJSYwz8SVF9qfqq5fxea4GtROcHpcbidjxbOoBQGrDgw6b3Qiws8CTZlwat6K4QUsrNpT dIDxOUp4= X-Gm-Gg: Acq92OG+XwIY36Ir6u8JaEG5GFULXatb194GqwQTQWJS4NgiUBWqe+b/MsFerXObwya lyAaWK86Ize6TA3HtPqHnkhaeC77hNraz0yx/30Ku30C903NSS+anYbww0p8ooUZUb1w5PoVlsy hgstgmmRvC+zf2fy+YJ7saCrZkuctVaYamPwuXzDh8ux9Yu+8Cp2SLSiDO52lWf+FJFdNYY0ft3 8dI1N99AYgzFZZScbGgoEXw3jGT8iZ1az6AmNdEUhEkLAXrQhAH1L/m7P0fmra70QppZeq//YcM oR9utb+qHG85Nt+gUNGei8Z6OIaJ217GAR4j9IObfLtQi/HN4f3iaLaF7HFWZUJpKV8ATqzPH/B smc9tc5S5h47dDqZb8HJsKrTTGoLWXjL8hhVWJJ2+YsPxcmwpiCCpDrMHVIIMLX86bsjamp2viQ EPVzp/p0C9DgRbZjcIzKYtVISIsk8G X-Received: by 2002:a17:90a:c2c3:b0:36a:b34:17e5 with SMTP id 98e67ed59e1d1-36a0b3418f9mr7373258a91.14.1779297521462; Wed, 20 May 2026 10:18:41 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Subject: [PATCH v5 28/30] fpu: Introduce float_status.e4m3_nan_is_snan Date: Wed, 20 May 2026 10:18:18 -0700 Message-ID: <20260520171820.848839-29-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260520171820.848839-1-richard.henderson@linaro.org> References: <20260520171820.848839-1-richard.henderson@linaro.org> MIME-Version: 1.0 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=lists1p.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1031; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1031.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: 1779297723522158500 Content-Type: text/plain; charset="utf-8" Introduce a separate control from float_snan_rule that applies only to the OCP E4M3 format. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- include/fpu/softfloat-helpers.h | 5 +++++ include/fpu/softfloat-types.h | 5 +++++ fpu/softfloat-parts.c.inc | 2 +- fpu/softfloat-specialize.c.inc | 5 +++++ 4 files changed, 16 insertions(+), 1 deletion(-) diff --git a/include/fpu/softfloat-helpers.h b/include/fpu/softfloat-helper= s.h index 4791a7fc87..8df0273132 100644 --- a/include/fpu/softfloat-helpers.h +++ b/include/fpu/softfloat-helpers.h @@ -131,6 +131,11 @@ static inline void set_snan_rule(FloatSNaNRule val, fl= oat_status *status) status->float_snan_rule =3D val; } =20 +static inline void set_float_e4m3_nan_is_snan(bool val, float_status *stat= us) +{ + status->e4m3_nan_is_snan =3D val; +} + static inline void set_float_rebias_overflow(bool val, float_status *statu= s) { status->rebias_overflow =3D val; diff --git a/include/fpu/softfloat-types.h b/include/fpu/softfloat-types.h index c5a6684763..d7f5303a6b 100644 --- a/include/fpu/softfloat-types.h +++ b/include/fpu/softfloat-types.h @@ -431,6 +431,11 @@ typedef struct float_status { /* do we detect and flush denormal results before or after rounding? */ bool ftz_before_rounding : 1; FloatSNaNRule float_snan_rule : 2; + /* + * Overriding float_snan_rule, is the single NaN representation for + * the OCP E4M3 format an SNaN or QNaN? + */ + bool e4m3_nan_is_snan : 1; Float2NaNPropRule float_2nan_prop_rule : 3; Float3NaNPropRule float_3nan_prop_rule : 7; FloatInfZeroNaNRule float_infzeronan_rule: 3; diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc index 184614ea47..559e40d196 100644 --- a/fpu/softfloat-parts.c.inc +++ b/fpu/softfloat-parts.c.inc @@ -246,7 +246,7 @@ static void partsN(canonicalize)(FloatPartsN *p, float_= status *status, case float_expmax_e4m3: if (p->frac_hi =3D=3D 0b111) { fracN(shl)(p, fmt->frac_shift); - p->cls =3D (parts_is_snan_frac(p->frac_hi, status) + p->cls =3D (get_float_e4m3_nan_is_snan(status) ? float_class_snan : float_class_qnan); return; } diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index b97c971ae6..8b765ef623 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -104,6 +104,11 @@ static inline bool get_float_rebias_underflow(const fl= oat_status *status) return status->rebias_underflow; } =20 +static inline bool get_float_e4m3_nan_is_snan(const float_status *status) +{ + return status->e4m3_nan_is_snan; +} + /*------------------------------------------------------------------------= ---- | For the deconstructed floating-point with fraction FRAC, return true | if the fraction represents a signalling NaN; otherwise false. --=20 2.43.0