From patchwork Mon Nov 4 15:27:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Liebler X-Patchwork-Id: 35614 Received: (qmail 50667 invoked by alias); 4 Nov 2019 15:28:02 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 50596 invoked by uid 89); 4 Nov 2019 15:28:02 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-22.8 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_SHORT, RCVD_IN_DNSWL_LOW, SPF_PASS autolearn=ham version=3.3.1 spammy=nearest, UD:math.h, 2191, mathh X-HELO: mx0a-001b2d01.pphosted.com From: Stefan Liebler To: libc-alpha@sourceware.org Cc: Stefan Liebler Subject: [PATCH 01/17] S390: Use load-fp-integer instruction for nearbyint functions. Date: Mon, 4 Nov 2019 16:27:08 +0100 x-cbid: 19110415-0016-0000-0000-000002C09A0C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19110415-0017-0000-0000-000033220BD2 Message-Id: <1572881244-6781-1-git-send-email-stli@linux.ibm.com> If compiled with z196 zarch support, the load-fp-integer instruction is used to implement nearbyint, nearbyintf, nearbyintl. Otherwise the common-code implementation is used. --- sysdeps/s390/fpu/s_nearbyint.c | 38 ++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_nearbyintf.c | 38 ++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_nearbyintl.c | 39 +++++++++++++++++++++++++++++++++ 3 files changed, 115 insertions(+) create mode 100644 sysdeps/s390/fpu/s_nearbyint.c create mode 100644 sysdeps/s390/fpu/s_nearbyintf.c create mode 100644 sysdeps/s390/fpu/s_nearbyintl.c diff --git a/sysdeps/s390/fpu/s_nearbyint.c b/sysdeps/s390/fpu/s_nearbyint.c new file mode 100644 index 0000000000..7af92ace0c --- /dev/null +++ b/sysdeps/s390/fpu/s_nearbyint.c @@ -0,0 +1,38 @@ +/* nearbyint() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +# include +# include + +double +__nearbyint (double x) +{ + double y; + /* The z196 zarch "load fp integer" (fidbra) instruction is rounding + x to the nearest integer according to current rounding mode (M3-field: 0) + where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fidbra %0,0,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_double (__nearbyint, nearbyint) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_nearbyintf.c b/sysdeps/s390/fpu/s_nearbyintf.c new file mode 100644 index 0000000000..66473e3b2e --- /dev/null +++ b/sysdeps/s390/fpu/s_nearbyintf.c @@ -0,0 +1,38 @@ +/* nearbyintf() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +# include +# include + +float +__nearbyintf (float x) +{ + float y; + /* The z196 zarch "load fp integer" (fiebra) instruction is rounding + x to the nearest integer according to current rounding mode (M3-field: 0) + where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fiebra %0,0,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_float (__nearbyint, nearbyint) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_nearbyintl.c b/sysdeps/s390/fpu/s_nearbyintl.c new file mode 100644 index 0000000000..f154cf41c7 --- /dev/null +++ b/sysdeps/s390/fpu/s_nearbyintl.c @@ -0,0 +1,39 @@ +/* nearbyintl() - S390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +# include +# include +# include + +_Float128 +__nearbyintl (_Float128 x) +{ + _Float128 y; + /* The z196 zarch "load fp integer" (fixbra) instruction is rounding + x to the nearest integer according to current rounding mode (M3-field: 0) + where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fixbra %0,0,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_ldouble (__nearbyint, nearbyint) + +#else +# include +#endif