From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 62377 invoked by alias); 11 Dec 2019 14:16:57 -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 62317 invoked by uid 10121); 11 Dec 2019 14:16:57 -0000 Date: Wed, 11 Dec 2019 14:16:00 -0000 Message-ID: <20191211141657.62315.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 load-fp-integer instruction for roundeven functions. X-Act-Checkin: glibc X-Git-Author: Stefan Liebler X-Git-Refname: refs/heads/master X-Git-Oldrev: 1902d5d5ff04771f16b67648789c75a18af06222 X-Git-Newrev: 4399b163376b331773e43917dcf56ce68e43e6a0 X-SW-Source: 2019-q4/txt/msg00577.txt.bz2 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4399b163376b331773e43917dcf56ce68e43e6a0 commit 4399b163376b331773e43917dcf56ce68e43e6a0 Author: Stefan Liebler Date: Wed Dec 11 15:09:28 2019 +0100 S390: Use load-fp-integer instruction for roundeven functions. If compiled with z196 zarch support, the load-fp-integer instruction is used to implement roundeven, roundevenf, roundevenl. Otherwise the common-code implementation is used. Diff: --- sysdeps/s390/fpu/s_roundeven.c | 39 +++++++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_roundevenf.c | 38 ++++++++++++++++++++++++++++++++++++++ sysdeps/s390/fpu/s_roundevenl.c | 39 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 116 insertions(+) diff --git a/sysdeps/s390/fpu/s_roundeven.c b/sysdeps/s390/fpu/s_roundeven.c new file mode 100644 index 0000000..95a83a7 --- /dev/null +++ b/sysdeps/s390/fpu/s_roundeven.c @@ -0,0 +1,39 @@ +/* roundeven() - 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 +__roundeven (double x) +{ + double y; + /* The z196 zarch "load fp integer" (fidbra) instruction is rounding + x to the nearest integer with "ties to even" rounding mode + (M3-field: 4) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fidbra %0,4,%1,4" : "=f" (y) : "f" (x)); + return y; +} +hidden_def (__roundeven) +libm_alias_double (__roundeven, roundeven) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_roundevenf.c b/sysdeps/s390/fpu/s_roundevenf.c new file mode 100644 index 0000000..c620a01 --- /dev/null +++ b/sysdeps/s390/fpu/s_roundevenf.c @@ -0,0 +1,38 @@ +/* roundevenf() - 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 +__roundevenf (float x) +{ + float y; + /* The z196 zarch "load fp integer" (fiebra) instruction is rounding + x to the nearest integer with "ties to even" rounding mode + (M3-field: 4) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fiebra %0,4,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_float (__roundeven, roundeven) + +#else +# include +#endif diff --git a/sysdeps/s390/fpu/s_roundevenl.c b/sysdeps/s390/fpu/s_roundevenl.c new file mode 100644 index 0000000..3481af2 --- /dev/null +++ b/sysdeps/s390/fpu/s_roundevenl.c @@ -0,0 +1,39 @@ +/* roundevenl() - 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 +__roundevenl (_Float128 x) +{ + _Float128 y; + /* The z196 zarch "load fp integer" (fixbra) instruction is rounding + x to the nearest integer with "ties to even" rounding mode + (M3-field: 4) where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fixbra %0,4,%1,4" : "=f" (y) : "f" (x)); + return y; +} +libm_alias_ldouble (__roundeven, roundeven) + +#else +# include +#endif