From patchwork Tue Jan 17 12:12:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: develop--- via Libc-alpha X-Patchwork-Id: 63271 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 216553858414 for ; Tue, 17 Jan 2023 12:13:20 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 216553858414 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1673957600; bh=sxQZjLChGNlOqM5V0vjAUah7pyIvaGaoWUN4Z6I4DF0=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=ptI0apVMl8AMklRCrBKvWWE4Si+HyxslYEOBmc9URv8Bpu3X8MXeGbDLfk5I4KkTi PmgmHobQAPuoMDOMzdx6SHP0qB0u2drH6lwJZrm0FTq1Rff6HNrBhmGrgy840eY7n4 0JncpgKk0TnKZWGvY+V+fFwh5QyG5+ZvhWheD6vk= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mx0b-00230701.pphosted.com (mx0b-00230701.pphosted.com [148.163.158.9]) by sourceware.org (Postfix) with ESMTPS id CB8243858D28 for ; Tue, 17 Jan 2023 12:12:55 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CB8243858D28 Received: from pps.filterd (m0297265.ppops.net [127.0.0.1]) by mx0a-00230701.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30HC3CLn018233; Tue, 17 Jan 2023 04:12:40 -0800 Received: from smtprelay-out1.synopsys.com (smtprelay-out1.synopsys.com [149.117.87.133]) by mx0a-00230701.pphosted.com (PPS) with ESMTPS id 3n3v71ehc4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Jan 2023 04:12:40 -0800 Received: from mailhost.synopsys.com (sv1-mailhost2.synopsys.com [10.205.2.132]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client CN "mailhost.synopsys.com", Issuer "SNPSica2" (verified OK)) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 5BBBBC2339; Tue, 17 Jan 2023 12:12:38 +0000 (UTC) Received: from SNPS-o0WHuHJU73.internal.synopsys.com (snps-o0whuhju73.internal.synopsys.com [10.116.104.120]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client did not present a certificate) by mailhost.synopsys.com (Postfix) with ESMTPSA id 57631A0073; Tue, 17 Jan 2023 12:12:35 +0000 (UTC) X-SNPS-Relay: synopsys.com To: libc-alpha@sourceware.org Cc: linux-snps-arc@lists.infradead.org, Pavel Kozlov Subject: [PATCH v2] ARC:fpu: add extra capability check before use of sqrt and fma builtins Date: Tue, 17 Jan 2023 16:12:23 +0400 Message-Id: <20230117121223.2635-1-kozlov@synopsys.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221221162849.12301-1-kozlov@synopsys.com> References: <20221221162849.12301-1-kozlov@synopsys.com> MIME-Version: 1.0 X-Proofpoint-GUID: NLPQKlDXwnQjWmR5hTSlyyFUvzYPIw_I X-Proofpoint-ORIG-GUID: NLPQKlDXwnQjWmR5hTSlyyFUvzYPIw_I X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.923,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-17_05,2023-01-17_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_active_cloned_notspam policy=outbound_active_cloned score=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 malwarescore=0 impostorscore=0 mlxlogscore=630 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 clxscore=1011 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301170101 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: "Pavel.Kozlov--- via Libc-alpha" From: develop--- via Libc-alpha Reply-To: Pavel.Kozlov@synopsys.com Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" From: Pavel Kozlov Add extra check for compiler definitions to ensure that compiler provides sqrt and fma hw fpu instructions else use software implementation. As divide/sqrt and FMA hw support from CPU side is optional, the compiler can be configured by options to generate hw FPU instructions, but without use of FDDIV, FDSQRT, FSDIV, FSSQRT, FDMADD and FSMADD instructions. In this case __builtin_sqrt and __builtin_sqrtf provided by compiler can't be used inside the glibc code, as these builtins are used in implementations of sqrt() and sqrtf() functions but at the same time these builtins unfold to sqrt() and sqrtf(). So it is possible to receive code like that: 0001c4b4 <__ieee754_sqrtf>: 1c4b4: 0001 0000 b 0 ;1c4b4 <__ieee754_sqrtf> The same is also true for __builtin_fma and __builtin_fmaf. Reviewed-by: Adhemerval Zanella --- Changes in v2: - Fixed macros definitions for FMA sysdeps/arc/fpu/math-use-builtins-fma.h | 14 ++++++++++++-- sysdeps/arc/fpu/math-use-builtins-sqrt.h | 14 ++++++++++++-- 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/sysdeps/arc/fpu/math-use-builtins-fma.h b/sysdeps/arc/fpu/math-use-builtins-fma.h index eede75aa41be..2acd8113ce2c 100644 --- a/sysdeps/arc/fpu/math-use-builtins-fma.h +++ b/sysdeps/arc/fpu/math-use-builtins-fma.h @@ -1,4 +1,14 @@ -#define USE_FMA_BUILTIN 1 -#define USE_FMAF_BUILTIN 1 +#if defined __ARC_FPU_DP_FMA__ +# define USE_FMA_BUILTIN 1 +#else +# define USE_FMA_BUILTIN 0 +#endif + +#if defined __ARC_FPU_SP_FMA__ +# define USE_FMAF_BUILTIN 1 +#else +# define USE_FMAF_BUILTIN 0 +#endif + #define USE_FMAL_BUILTIN 0 #define USE_FMAF128_BUILTIN 0 diff --git a/sysdeps/arc/fpu/math-use-builtins-sqrt.h b/sysdeps/arc/fpu/math-use-builtins-sqrt.h index e94c915ba66a..a449bc609295 100644 --- a/sysdeps/arc/fpu/math-use-builtins-sqrt.h +++ b/sysdeps/arc/fpu/math-use-builtins-sqrt.h @@ -1,4 +1,14 @@ -#define USE_SQRT_BUILTIN 1 -#define USE_SQRTF_BUILTIN 1 +#if defined __ARC_FPU_DP_DIV__ +# define USE_SQRT_BUILTIN 1 +#else +# define USE_SQRT_BUILTIN 0 +#endif + +#if defined __ARC_FPU_SP_DIV__ +# define USE_SQRTF_BUILTIN 1 +#else +# define USE_SQRTF_BUILTIN 0 +#endif + #define USE_SQRTL_BUILTIN 0 #define USE_SQRTF128_BUILTIN 0