glibc/SOURCES/glibc-rh1780204-02.patch

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2021-04-23 04:11:25 +00:00
From 73f98d03d2cde34255c0a39ef18902bffdce0185 Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.ibm.com>
Date: Wed, 11 Dec 2019 15:09:14 +0100
Subject: [PATCH 02/28] Always use wordsize-64 version of s_rint.c.
This patch replaces s_rint.c in sysdeps/dbl-64 with the one in
sysdeps/dbl-64/wordsize-64 and removes the latter one.
The code is not changed except changes in code style.
Also adjusted the include path in x86_64 file.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit ab48bdd098a675dddb360faafc497a61c4bd4334)
---
sysdeps/ieee754/dbl-64/s_rint.c | 32 ++++++------
sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c | 57 ---------------------
sysdeps/x86_64/fpu/multiarch/s_rint-c.c | 2 +-
3 files changed, 17 insertions(+), 74 deletions(-)
delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
diff --git a/sysdeps/ieee754/dbl-64/s_rint.c b/sysdeps/ieee754/dbl-64/s_rint.c
index cb0f5ca298..7f3dc87b96 100644
--- a/sysdeps/ieee754/dbl-64/s_rint.c
+++ b/sysdeps/ieee754/dbl-64/s_rint.c
@@ -1,4 +1,3 @@
-/* @(#)s_rint.c 5.1 93/09/24 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
@@ -25,38 +24,39 @@
#include <libm-alias-double.h>
static const double
- TWO52[2] = {
- 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
- -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
+TWO52[2] = {
+ 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
+ -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
};
double
__rint (double x)
{
- int32_t i0, j0, sx;
- double w, t;
- GET_HIGH_WORD (i0, x);
- sx = (i0 >> 31) & 1;
- j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
+ int64_t i0, sx;
+ int32_t j0;
+ EXTRACT_WORDS64 (i0, x);
+ sx = (i0 >> 63) & 1;
+ j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
if (j0 < 52)
{
if (j0 < 0)
{
- w = TWO52[sx] + x;
- t = w - TWO52[sx];
- GET_HIGH_WORD (i0, t);
- SET_HIGH_WORD (t, (i0 & 0x7fffffff) | (sx << 31));
+ double w = TWO52[sx] + x;
+ double t = w - TWO52[sx];
+ EXTRACT_WORDS64 (i0, t);
+ INSERT_WORDS64 (t, (i0 & UINT64_C (0x7fffffffffffffff))
+ | (sx << 63));
return t;
}
}
else
{
if (j0 == 0x400)
- return x + x; /* inf or NaN */
+ return x + x; /* inf or NaN */
else
- return x; /* x is integral */
+ return x; /* x is integral */
}
- w = TWO52[sx] + x;
+ double w = TWO52[sx] + x;
return w - TWO52[sx];
}
#ifndef __rint
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
deleted file mode 100644
index 622e479c5f..0000000000
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-/*
- * rint(x)
- * Return x rounded to integral value according to the prevailing
- * rounding mode.
- * Method:
- * Using floating addition.
- * Exception:
- * Inexact flag raised if x not equal to rint(x).
- */
-
-#include <math.h>
-#include <math_private.h>
-#include <libm-alias-double.h>
-
-static const double
-TWO52[2]={
- 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
- -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
-};
-
-double
-__rint(double x)
-{
- int64_t i0,sx;
- int32_t j0;
- EXTRACT_WORDS64(i0,x);
- sx = (i0>>63)&1;
- j0 = ((i0>>52)&0x7ff)-0x3ff;
- if(j0<52) {
- if(j0<0) {
- double w = TWO52[sx]+x;
- double t = w-TWO52[sx];
- EXTRACT_WORDS64(i0,t);
- INSERT_WORDS64(t,(i0&UINT64_C(0x7fffffffffffffff))|(sx<<63));
- return t;
- }
- } else {
- if(j0==0x400) return x+x; /* inf or NaN */
- else return x; /* x is integral */
- }
- double w = TWO52[sx]+x;
- return w-TWO52[sx];
-}
-#ifndef __rint
-libm_alias_double (__rint, rint)
-#endif
diff --git a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
index 162a630ff9..b010150f52 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
@@ -1,3 +1,3 @@
#undef __rint
#define __rint __rint_c
-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c>
+#include <sysdeps/ieee754/dbl-64/s_rint.c>
--
2.18.2