From patchwork Tue Dec 22 15:30:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raphael M Zinsly X-Patchwork-Id: 1419435 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=libc-alpha-bounces@sourceware.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=sourceware.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.a=rsa-sha256 header.s=default header.b=FbeyDcyC; dkim-atps=neutral Received: from sourceware.org (unknown [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4D0gKZ4TJVz9sWH for ; 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Tue, 22 Dec 2020 15:31:03 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 89A9F112069; Tue, 22 Dec 2020 15:31:02 +0000 (GMT) Received: from localhost (unknown [9.160.38.10]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 22 Dec 2020 15:31:02 +0000 (GMT) To: libc-alpha@sourceware.org Subject: [PATCH] powerpc: Add optimized ilogbf128 for POWER9 Date: Tue, 22 Dec 2020 12:30:38 -0300 Message-Id: <20201222153039.17722-1-rzinsly@linux.ibm.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-22_07:2020-12-21, 2020-12-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=466 phishscore=0 suspectscore=0 impostorscore=0 spamscore=0 mlxscore=0 malwarescore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012220111 X-Spam-Status: No, score=-11.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, KAM_NUMSUBJECT, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) 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: Raphael Moreira Zinsly via Libc-alpha From: Raphael M Zinsly Reply-To: Raphael Moreira Zinsly Cc: tuliom@linux.ibm.com, Raphael Moreira Zinsly Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" The instruction xsxexpqp introduced on POWER9 extracts the exponent from a quad-precision floating-point, thus it can be used to improve ilogbf128 and llogbf128. --- .../powerpc/powerpc64/le/fpu/e_ilogbf128.c | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c diff --git a/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c b/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c new file mode 100644 index 0000000000..47558bbadc --- /dev/null +++ b/sysdeps/powerpc/powerpc64/le/fpu/e_ilogbf128.c @@ -0,0 +1,22 @@ +#ifdef _ARCH_PWR9 +int _ilogbf128 (_Float128 __x); + +int +#if defined(_F128_ENABLE_IFUNC) +__ieee754_ilogbf128_power9 (_Float128 __x) +#else +__ieee754_ilogbf128 (_Float128 __x) +#endif +{ + /* Check for exceptional cases. */ + if (!__builtin_vsx_scalar_test_data_class_qp (__x, 0x7f)) + return __builtin_vsx_scalar_extract_expq (__x) - 0x3fff; + else + /* Fallback to the generic ilogb if __x is NaN, Inf or subnormal. */ + return _ilogbf128(__x); +} + +#define __ieee754_ilogbf128 _ilogbf128 +#endif + +#include From patchwork Tue Dec 22 15:30:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raphael M Zinsly X-Patchwork-Id: 1419436 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=libc-alpha-bounces@sourceware.org; receiver=) Authentication-Results: ozlabs.org; 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Tue, 22 Dec 2020 15:31:13 GMT Received: from b03cxnp07028.gho.boulder.ibm.com (b03cxnp07028.gho.boulder.ibm.com [9.17.130.15]) by ppma02dal.us.ibm.com with ESMTP id 35kj7qrk5t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 22 Dec 2020 15:31:13 +0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0BMFVBjV25624882 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 22 Dec 2020 15:31:11 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 71941C6055; Tue, 22 Dec 2020 15:31:11 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D7CDCC605B; Tue, 22 Dec 2020 15:31:10 +0000 (GMT) Received: from localhost (unknown [9.160.38.10]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 22 Dec 2020 15:31:10 +0000 (GMT) To: libc-alpha@sourceware.org Subject: [PATCH 2/2] benchtests: Add ilogbf128 test Date: Tue, 22 Dec 2020 12:30:39 -0300 Message-Id: <20201222153039.17722-2-rzinsly@linux.ibm.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201222153039.17722-1-rzinsly@linux.ibm.com> References: <20201222153039.17722-1-rzinsly@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-22_07:2020-12-21, 2020-12-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=986 priorityscore=1501 impostorscore=0 malwarescore=0 lowpriorityscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 clxscore=1015 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012220107 X-Spam-Status: No, score=-12.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) 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: Raphael Moreira Zinsly via Libc-alpha From: Raphael M Zinsly Reply-To: Raphael Moreira Zinsly Cc: tuliom@linux.ibm.com, Raphael Moreira Zinsly Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" Add a benchtest to ilogbf128 based on the logb benchtests. --- benchtests/Makefile | 2 +- benchtests/ilogbf128-inputs | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) create mode 100644 benchtests/ilogbf128-inputs diff --git a/benchtests/Makefile b/benchtests/Makefile index 5cd211ee9a..9c7d99ae66 100644 --- a/benchtests/Makefile +++ b/benchtests/Makefile @@ -28,7 +28,7 @@ bench-math := acos acosh asin asinh atan atanh cos cosh exp exp2 log log2 \ exp10f ifneq (,$(filter yes,$(float128-fcts) $(float128-alias-fcts))) -bench-math += expf128 powf128 sinf128 +bench-math += expf128 powf128 sinf128 ilogbf128 endif bench-pthread := pthread_once thread_create pthread-locks diff --git a/benchtests/ilogbf128-inputs b/benchtests/ilogbf128-inputs new file mode 100644 index 0000000000..bfbfc93714 --- /dev/null +++ b/benchtests/ilogbf128-inputs @@ -0,0 +1,11 @@ +## args: _Float128 +## ret: int +## includes: math.h + +## name: subnormal +6.47517511943802511092443895822764655e-4966f128 +0x1.fffffffffffffff8p-16383f128 + +## name: normal +1.0 +-0x8.2faf442f390a9211f5af128673fp+0L