From patchwork Mon Dec 9 12:45:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Liebler X-Patchwork-Id: 36651 Received: (qmail 91416 invoked by alias); 9 Dec 2019 12:49:28 -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 91407 invoked by uid 89); 9 Dec 2019 12:49:28 -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= X-HELO: mx0a-001b2d01.pphosted.com From: Stefan Liebler To: libc-alpha@sourceware.org Cc: Stefan Liebler Subject: [PATCH v2 06/18] Always use wordsize-64 version of s_round.c. Date: Mon, 9 Dec 2019 13:45:56 +0100 In-Reply-To: <1575895568-26473-1-git-send-email-stli@linux.ibm.com> References: <1575895568-26473-1-git-send-email-stli@linux.ibm.com> x-cbid: 19120912-0008-0000-0000-0000033F1B45 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19120912-0009-0000-0000-00004A5E47DA Message-Id: <1575895568-26473-7-git-send-email-stli@linux.ibm.com> This patch replaces s_round.c in sysdeps/dbl-64 with the one in sysdeps/dbl-64/wordsize-64 and removes the latter one. --- sysdeps/ieee754/dbl-64/s_round.c | 39 ++++-------- sysdeps/ieee754/dbl-64/wordsize-64/s_round.c | 66 -------------------- 2 files changed, 12 insertions(+), 93 deletions(-) delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_round.c diff --git a/sysdeps/ieee754/dbl-64/s_round.c b/sysdeps/ieee754/dbl-64/s_round.c index 1793e575e9..8f4b7cff86 100644 --- a/sysdeps/ieee754/dbl-64/s_round.c +++ b/sysdeps/ieee754/dbl-64/s_round.c @@ -22,38 +22,36 @@ #include #include +#include double __round (double x) { - int32_t i0, j0; - uint32_t i1; + int64_t i0, j0; - EXTRACT_WORDS (i0, i1, x); - j0 = ((i0 >> 20) & 0x7ff) - 0x3ff; - if (j0 < 20) + EXTRACT_WORDS64 (i0, x); + j0 = ((i0 >> 52) & 0x7ff) - 0x3ff; + if (__glibc_likely (j0 < 52)) { if (j0 < 0) { - i0 &= 0x80000000; + i0 &= UINT64_C (0x8000000000000000); if (j0 == -1) - i0 |= 0x3ff00000; - i1 = 0; + i0 |= UINT64_C (0x3ff0000000000000); } else { - uint32_t i = 0x000fffff >> j0; - if (((i0 & i) | i1) == 0) + uint64_t i = UINT64_C (0x000fffffffffffff) >> j0; + if ((i0 & i) == 0) /* X is integral. */ return x; - i0 += 0x00080000 >> j0; + i0 += UINT64_C (0x0008000000000000) >> j0; i0 &= ~i; - i1 = 0; } } - else if (j0 > 51) + else { if (j0 == 0x400) /* Inf or NaN. */ @@ -61,21 +59,8 @@ __round (double x) else return x; } - else - { - uint32_t i = 0xffffffff >> (j0 - 20); - if ((i1 & i) == 0) - /* X is integral. */ - return x; - - uint32_t j = i1 + (1 << (51 - j0)); - if (j < i1) - i0 += 1; - i1 = j; - i1 &= ~i; - } - INSERT_WORDS (x, i0, i1); + INSERT_WORDS64 (x, i0); return x; } libm_alias_double (__round, round) diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c deleted file mode 100644 index 1c3fc7f50e..0000000000 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c +++ /dev/null @@ -1,66 +0,0 @@ -/* Round double to integer away from zero. - Copyright (C) 1997-2019 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper , 1997. - - 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 - . */ - -#define NO_MATH_REDIRECT -#include - -#include -#include -#include - - -double -__round (double x) -{ - int64_t i0, j0; - - EXTRACT_WORDS64 (i0, x); - j0 = ((i0 >> 52) & 0x7ff) - 0x3ff; - if (__glibc_likely (j0 < 52)) - { - if (j0 < 0) - { - i0 &= UINT64_C(0x8000000000000000); - if (j0 == -1) - i0 |= UINT64_C(0x3ff0000000000000); - } - else - { - uint64_t i = UINT64_C(0x000fffffffffffff) >> j0; - if ((i0 & i) == 0) - /* X is integral. */ - return x; - - i0 += UINT64_C(0x0008000000000000) >> j0; - i0 &= ~i; - } - } - else - { - if (j0 == 0x400) - /* Inf or NaN. */ - return x + x; - else - return x; - } - - INSERT_WORDS64 (x, i0); - return x; -} -libm_alias_double (__round, round)