forked from rpms/glibc
168 lines
4.2 KiB
Diff
168 lines
4.2 KiB
Diff
From 577943dac79a5657bdfe51e06e289eb2473c3d2e Mon Sep 17 00:00:00 2001
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From: Stefan Liebler <stli@linux.ibm.com>
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Date: Wed, 11 Dec 2019 15:09:17 +0100
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Subject: [PATCH 06/28] Always use wordsize-64 version of s_round.c.
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This patch replaces s_round.c in sysdeps/dbl-64 with the one in
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sysdeps/dbl-64/wordsize-64 and removes the latter one.
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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(cherry picked from commit 36e9acbd5cb2c330c0d53195db4a0ee31f2c3097)
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---
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sysdeps/ieee754/dbl-64/s_round.c | 39 ++++--------
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sysdeps/ieee754/dbl-64/wordsize-64/s_round.c | 65 --------------------
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2 files changed, 12 insertions(+), 92 deletions(-)
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delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
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diff --git a/sysdeps/ieee754/dbl-64/s_round.c b/sysdeps/ieee754/dbl-64/s_round.c
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index fa9e83196e..bf9922edca 100644
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--- a/sysdeps/ieee754/dbl-64/s_round.c
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+++ b/sysdeps/ieee754/dbl-64/s_round.c
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@@ -21,38 +21,36 @@
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#include <math_private.h>
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#include <libm-alias-double.h>
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+#include <stdint.h>
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double
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__round (double x)
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{
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- int32_t i0, j0;
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- uint32_t i1;
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+ int64_t i0, j0;
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- EXTRACT_WORDS (i0, i1, x);
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- j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
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- if (j0 < 20)
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+ EXTRACT_WORDS64 (i0, x);
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+ j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
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+ if (__glibc_likely (j0 < 52))
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{
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if (j0 < 0)
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{
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- i0 &= 0x80000000;
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+ i0 &= UINT64_C (0x8000000000000000);
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if (j0 == -1)
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- i0 |= 0x3ff00000;
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- i1 = 0;
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+ i0 |= UINT64_C (0x3ff0000000000000);
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}
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else
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{
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- uint32_t i = 0x000fffff >> j0;
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- if (((i0 & i) | i1) == 0)
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+ uint64_t i = UINT64_C (0x000fffffffffffff) >> j0;
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+ if ((i0 & i) == 0)
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/* X is integral. */
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return x;
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- i0 += 0x00080000 >> j0;
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+ i0 += UINT64_C (0x0008000000000000) >> j0;
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i0 &= ~i;
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- i1 = 0;
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}
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}
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- else if (j0 > 51)
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+ else
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{
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if (j0 == 0x400)
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/* Inf or NaN. */
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@@ -60,21 +58,8 @@ __round (double x)
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else
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return x;
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}
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- else
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- {
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- uint32_t i = 0xffffffff >> (j0 - 20);
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- if ((i1 & i) == 0)
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- /* X is integral. */
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- return x;
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-
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- uint32_t j = i1 + (1 << (51 - j0));
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- if (j < i1)
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- i0 += 1;
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- i1 = j;
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- i1 &= ~i;
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- }
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- INSERT_WORDS (x, i0, i1);
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+ INSERT_WORDS64 (x, i0);
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return x;
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}
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libm_alias_double (__round, round)
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diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
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deleted file mode 100644
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index 3323621ce3..0000000000
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--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
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+++ /dev/null
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@@ -1,65 +0,0 @@
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-/* Round double to integer away from zero.
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- Copyright (C) 1997-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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- Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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-
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- The GNU C Library is free software; you can redistribute it and/or
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- modify it under the terms of the GNU Lesser General Public
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- License as published by the Free Software Foundation; either
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- version 2.1 of the License, or (at your option) any later version.
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-
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- The GNU C Library is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- Lesser General Public License for more details.
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-
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- You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library; if not, see
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- <http://www.gnu.org/licenses/>. */
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-
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-#include <math.h>
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-
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-#include <math_private.h>
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-#include <libm-alias-double.h>
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-#include <stdint.h>
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-
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-
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-double
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-__round (double x)
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-{
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- int64_t i0, j0;
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-
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- EXTRACT_WORDS64 (i0, x);
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- j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
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- if (__glibc_likely (j0 < 52))
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- {
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- if (j0 < 0)
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- {
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- i0 &= UINT64_C(0x8000000000000000);
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- if (j0 == -1)
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- i0 |= UINT64_C(0x3ff0000000000000);
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- }
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- else
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- {
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- uint64_t i = UINT64_C(0x000fffffffffffff) >> j0;
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- if ((i0 & i) == 0)
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- /* X is integral. */
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- return x;
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-
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- i0 += UINT64_C(0x0008000000000000) >> j0;
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- i0 &= ~i;
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- }
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- }
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- else
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- {
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- if (j0 == 0x400)
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- /* Inf or NaN. */
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- return x + x;
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- else
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- return x;
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- }
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-
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- INSERT_WORDS64 (x, i0);
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- return x;
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-}
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-libm_alias_double (__round, round)
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--
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2.18.2
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