From 577943dac79a5657bdfe51e06e289eb2473c3d2e Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.ibm.com>
Date: Wed, 11 Dec 2019 15:09:17 +0100
Subject: [PATCH 06/28] Always use wordsize-64 version of s_round.c.
This patch replaces s_round.c in sysdeps/dbl-64 with the one in
sysdeps/dbl-64/wordsize-64 and removes the latter one.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 36e9acbd5cb2c330c0d53195db4a0ee31f2c3097)
---
sysdeps/ieee754/dbl-64/s_round.c | 39 ++++--------
sysdeps/ieee754/dbl-64/wordsize-64/s_round.c | 65 --------------------
2 files changed, 12 insertions(+), 92 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 fa9e83196e..bf9922edca 100644
--- a/sysdeps/ieee754/dbl-64/s_round.c
+++ b/sysdeps/ieee754/dbl-64/s_round.c
@@ -21,38 +21,36 @@
#include <math_private.h>
#include <libm-alias-double.h>
+#include <stdint.h>
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. */
@@ -60,21 +58,8 @@ __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 3323621ce3..0000000000
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_round.c
+++ /dev/null
@@ -1,65 +0,0 @@
-/* Round double to integer away from zero.
- Copyright (C) 1997-2018 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@cygnus.com>, 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
- <http://www.gnu.org/licenses/>. */
-
-#include <math.h>
-
-#include <math_private.h>
-#include <libm-alias-double.h>
-#include <stdint.h>
-
-
-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)
--
2.18.2