glibc/SOURCES/glibc-rh1780204-29.patch

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2021-04-23 04:11:25 +00:00
From af123aa95091d3d2d1b4ff027cf806ca1721d29d 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 01/28] Always use wordsize-64 version of s_nearbyint.c.
This patch replaces s_nearbyint.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>
---
sysdeps/ieee754/dbl-64/s_nearbyint.c | 38 ++++++--------
sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c | 65 ------------------------
sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c | 2 +-
3 files changed, 17 insertions(+), 88 deletions(-)
delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c
Note: tweaked by DJ for backport; some portions handled by glibc-rh1780204-07.patch
diff -rupN a/sysdeps/ieee754/dbl-64/s_nearbyint.c b/sysdeps/ieee754/dbl-64/s_nearbyint.c
--- a/sysdeps/ieee754/dbl-64/s_nearbyint.c 2020-04-09 21:17:04.281854809 -0400
+++ b/sysdeps/ieee754/dbl-64/s_nearbyint.c 2020-04-09 21:28:13.380741798 -0400
@@ -10,10 +10,6 @@
* ====================================================
*/
-#if defined(LIBM_SCCS) && !defined(lint)
-static char rcsid[] = "$NetBSD: s_rint.c,v 1.8 1995/05/10 20:48:04 jtc Exp $";
-#endif
-
/*
* rint(x)
* Return x rounded to integral value according to the prevailing
@@ -44,35 +40,33 @@ __nearbyint (double x)
-4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
};
fenv_t env;
- int32_t i0, j0, sx;
- double w, t;
- GET_HIGH_WORD (i0, x);
- sx = (i0 >> 31) & 1;
- j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
- if (j0 < 52)
+ int64_t i0, sx;
+ int32_t j0;
+ EXTRACT_WORDS64 (i0, x);
+ sx = (i0 >> 63) & 1;
+ j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
+ if (__glibc_likely (j0 < 52))
{
if (j0 < 0)
{
libc_feholdexcept (&env);
- w = TWO52[sx] + math_opt_barrier (x);
- t = w - TWO52[sx];
+ double w = TWO52[sx] + math_opt_barrier (x);
+ double t = w - TWO52[sx];
math_force_eval (t);
libc_fesetenv (&env);
- GET_HIGH_WORD (i0, t);
- SET_HIGH_WORD (t, (i0 & 0x7fffffff) | (sx << 31));
- return t;
+ return copysign (t, x);
}
}
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 */
}
libc_feholdexcept (&env);
- w = TWO52[sx] + math_opt_barrier (x);
- t = w - TWO52[sx];
+ double w = TWO52[sx] + math_opt_barrier (x);
+ double t = w - TWO52[sx];
math_force_eval (t);
libc_fesetenv (&env);
return t;
diff -rupN a/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c 2018-08-01 01:10:47.000000000 -0400
+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c 1969-12-31 19:00:00.000000000 -0500
@@ -1,64 +0,0 @@
-/* Adapted for use as nearbyint by Ulrich Drepper <drepper@cygnus.com>. */
-/*
- * ====================================================
- * 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 <fenv.h>
-#include <math.h>
-#include <math-barriers.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
-__nearbyint(double x)
-{
- fenv_t env;
- int64_t i0,sx;
- int32_t j0;
- EXTRACT_WORDS64(i0,x);
- sx = (i0>>63)&1;
- j0 = ((i0>>52)&0x7ff)-0x3ff;
- if(__builtin_expect(j0<52, 1)) {
- if(j0<0) {
- libc_feholdexcept (&env);
- double w = TWO52[sx] + math_opt_barrier (x);
- double t = w-TWO52[sx];
- math_force_eval (t);
- libc_fesetenv (&env);
- return __copysign (t, x);
- }
- } else {
- if(j0==0x400) return x+x; /* inf or NaN */
- else return x; /* x is integral */
- }
- libc_feholdexcept (&env);
- double w = TWO52[sx] + math_opt_barrier (x);
- double t = w-TWO52[sx];
- math_force_eval (t);
- libc_fesetenv (&env);
- return t;
-}
-libm_alias_double (__nearbyint, nearbyint)
diff -rupN a/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c b/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c
--- a/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c 2018-08-01 01:10:47.000000000 -0400
+++ b/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c 2020-04-09 21:28:13.205735274 -0400
@@ -1,3 +1,3 @@
#undef __nearbyint
#define __nearbyint __nearbyint_c
-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c>
+#include <sysdeps/ieee754/dbl-64/s_nearbyint.c>