From patchwork Mon Nov 4 15:27:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Liebler X-Patchwork-Id: 35613 Received: (qmail 50611 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 50546 invoked by uid 89); 4 Nov 2019 15:28:01 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-22.7 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 05/17] S390: Use load-fp-integer instruction for trunc functions. Date: Mon, 4 Nov 2019 16:27:12 +0100 In-Reply-To: <1572881244-6781-1-git-send-email-stli@linux.ibm.com> References: <1572881244-6781-1-git-send-email-stli@linux.ibm.com> x-cbid: 19110415-0020-0000-0000-000003826D83 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19110415-0021-0000-0000-000021D89277 Message-Id: <1572881244-6781-5-git-send-email-stli@linux.ibm.com> If compiled with z196 zarch support, the load-fp-integer instruction is used to implement trunc, truncf, truncl. Otherwise the common-code implementation is used. --- sysdeps/s390/fpu/s_trunc.c | 39 ++++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_truncf.c | 39 ++++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_truncl.c | 40 +++++++++++++++++++++++++++++++++++++ 3 files changed, 118 insertions(+) create mode 100644 sysdeps/s390/fpu/s_trunc.c create mode 100644 sysdeps/s390/fpu/s_truncf.c create mode 100644 sysdeps/s390/fpu/s_truncl.c diff --git a/sysdeps/s390/fpu/s_trunc.c b/sysdeps/s390/fpu/s_trunc.c new file mode 100644 index 0000000000..7744843a91 --- /dev/null +++ b/sysdeps/s390/fpu/s_trunc.c @@ -0,0 +1,39 @@ +/* trunc() - 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 +# define NO_MATH_REDIRECT +# include +# include + +double +__trunc (double x) +{ + double y; + /* The z196 zarch "load fp integer" (fidbra) instruction is rounding + x to the nearest integer with "round towards zero" rounding mode + (M3-field: 5) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fidbra %0,5,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_double (__trunc, trunc) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_truncf.c b/sysdeps/s390/fpu/s_truncf.c new file mode 100644 index 0000000000..40c126eef2 --- /dev/null +++ b/sysdeps/s390/fpu/s_truncf.c @@ -0,0 +1,39 @@ +/* truncf() - 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 +# define NO_MATH_REDIRECT +# include +# include + +float +__truncf (float x) +{ + float y; + /* The z196 zarch "load fp integer" (fiebra) instruction is rounding + x to the nearest integer with "round towards zero" rounding mode + (M3-field: 5) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fiebra %0,5,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_float (__trunc, trunc) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_truncl.c b/sysdeps/s390/fpu/s_truncl.c new file mode 100644 index 0000000000..68de3ea6bc --- /dev/null +++ b/sysdeps/s390/fpu/s_truncl.c @@ -0,0 +1,40 @@ +/* truncl() - 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 +# define NO_MATH_REDIRECT +# include +# include +# include + +_Float128 +__truncl (_Float128 x) +{ + _Float128 y; + /* The z196 zarch "load fp integer" (fixbra) instruction is rounding + x to the nearest integer with "round towards zero" rounding mode + (M3-field: 5) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fixbra %0,5,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_ldouble (__trunc, trunc) + +#else +# include +#endif