From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 64853 invoked by alias); 11 Dec 2019 14:17:39 -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 64835 invoked by uid 10121); 11 Dec 2019 14:17:39 -0000 Date: Wed, 11 Dec 2019 14:17:00 -0000 Message-ID: <20191211141739.64834.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: Implement roundtoint and converttoint and define TOINT_INTRINSICS. X-Act-Checkin: glibc X-Git-Author: Stefan Liebler X-Git-Refname: refs/heads/master X-Git-Oldrev: 433a2ba68cd91842546e0f0d43d65835634d570d X-Git-Newrev: 2763d3145a326aa9afa613fe9e1b444cf912a883 X-SW-Source: 2019-q4/txt/msg00585.txt.bz2 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2763d3145a326aa9afa613fe9e1b444cf912a883 commit 2763d3145a326aa9afa613fe9e1b444cf912a883 Author: Stefan Liebler Date: Wed Dec 11 15:09:33 2019 +0100 S390: Implement roundtoint and converttoint and define TOINT_INTRINSICS. This patch implements roundtoint and convertoint for s390 by using the load-fp-integer and convert-to-fixed instructions. Both functions are using "round to nearest with ties away from zero" rounding mode and do not raise inexact exceptions. Diff: --- sysdeps/s390/fpu/math_private.h | 53 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/sysdeps/s390/fpu/math_private.h b/sysdeps/s390/fpu/math_private.h new file mode 100644 index 0000000..a1ae91a --- /dev/null +++ b/sysdeps/s390/fpu/math_private.h @@ -0,0 +1,53 @@ +/* Configure optimized libm functions. 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 + . */ + +#ifndef S390_MATH_PRIVATE_H +#define S390_MATH_PRIVATE_H 1 + +#include +#include + +#ifdef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT +# define TOINT_INTRINSICS 1 + +static inline double_t +roundtoint (double_t x) +{ + double_t y; + /* The z196 zarch "load fp integer" (fidbra) instruction is rounding + x to the nearest integer with ties away from zero (M3-field: 1) + where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("fidbra %0,1,%1,4" : "=f" (y) : "f" (x)); + return y; +} + +static inline int32_t +converttoint (double_t x) +{ + int32_t y; + /* The z196 zarch "convert to fixed" (cfdbra) instruction is rounding + x to the nearest integer with ties away from zero (M3-field: 1) + where inexact exceptions are suppressed (M4-field: 4). */ + __asm__ ("cfdbra %0,1,%1,4" : "=d" (y) : "f" (x) : "cc"); + return y; +} +#endif + +#include_next + +#endif