From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 63597 invoked by alias); 11 Dec 2019 14:17:13 -0000 Mailing-List: contact glibc-cvs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: , Sender: glibc-cvs-owner@sourceware.org List-Subscribe: Received: (qmail 63580 invoked by uid 10121); 11 Dec 2019 14:17:13 -0000 Date: Wed, 11 Dec 2019 14:17:00 -0000 Message-ID: <20191211141713.63579.qmail@sourceware.org> Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Stefan Liebler To: glibc-cvs@sourceware.org Subject: [glibc] S390: Use convert-to-fixed instruction for lround functions. X-Act-Checkin: glibc X-Git-Author: Stefan Liebler X-Git-Refname: refs/heads/master X-Git-Oldrev: f10c1654fe13d797d2fd347dc47f72f93c58cf62 X-Git-Newrev: 9d9f3527daf65fdca0eb46eaa324b81b8f94d88c X-SW-Source: 2019-q4/txt/msg00580.txt.bz2 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9d9f3527daf65fdca0eb46eaa324b81b8f94d88c commit 9d9f3527daf65fdca0eb46eaa324b81b8f94d88c Author: Stefan Liebler Date: Wed Dec 11 15:09:30 2019 +0100 S390: Use convert-to-fixed instruction for lround functions. If compiled with z196 zarch support, the convert-to-fixed instruction is used to implement lround, lroundf, lroundl. Otherwise the common-code implementation is used. Diff: --- sysdeps/s390/fpu/s_lround.c | 47 +++++++++++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_lroundf.c | 47 +++++++++++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_lroundl.c | 48 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 142 insertions(+) diff --git a/sysdeps/s390/fpu/s_lround.c b/sysdeps/s390/fpu/s_lround.c new file mode 100644 index 0000000..9290ec3 --- /dev/null +++ b/sysdeps/s390/fpu/s_lround.c @@ -0,0 +1,47 @@ +/* lround() - 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 + +/* The sizeof (long int) differs between s390x (8byte) and s390 (4byte). + Thus we need different instructions as the target size is encoded there. + Note: On s390 this instruction is only used if build with -mzarch. */ +# ifdef __s390x__ +# define INSN "cgdbra" +# else +# define INSN "cfdbra" +# endif + +long int +__lround (double x) +{ + long int y; + /* The z196 zarch "convert to fixed" (cgdbra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ (INSN " %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_double (__lround, lround) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_lroundf.c b/sysdeps/s390/fpu/s_lroundf.c new file mode 100644 index 0000000..097b924 --- /dev/null +++ b/sysdeps/s390/fpu/s_lroundf.c @@ -0,0 +1,47 @@ +/* lroundf() - 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 + +/* The sizeof (long int) differs between s390x (8byte) and s390 (4byte). + Thus we need different instructions as the target size is encoded there. + Note: On s390 this instruction is only used if build with -mzarch. */ +# ifdef __s390x__ +# define INSN "cgebra" +# else +# define INSN "cfebra" +# endif + +long int +__lroundf (float x) +{ + long int y; + /* The z196 zarch "convert to fixed" (cgebra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ (INSN " %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_float (__lround, lround) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_lroundl.c b/sysdeps/s390/fpu/s_lroundl.c new file mode 100644 index 0000000..0ef77dc --- /dev/null +++ b/sysdeps/s390/fpu/s_lroundl.c @@ -0,0 +1,48 @@ +/* lroundl() - 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 + +/* The sizeof (long int) differs between s390x (8byte) and s390 (4byte). + Thus we need different instructions as the target size is encoded there. + Note: On s390 this instruction is only used if build with -mzarch. */ +# ifdef __s390x__ +# define INSN "cgxbra" +# else +# define INSN "cfxbra" +# endif + +long int +__lroundl (_Float128 x) +{ + long int y; + /* The z196 zarch "convert to fixed" (cgxbra) instruction is rounding + x to the nearest integer with "ties away from 0" rounding mode + (M3-field: 1) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ (INSN " %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +libm_alias_ldouble (__lround, lround) + +#else +# include +#endif