161 lines
5.1 KiB
Diff
161 lines
5.1 KiB
Diff
From af123aa95091d3d2d1b4ff027cf806ca1721d29d 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 15:09:14 +0100
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Subject: [PATCH 01/28] Always use wordsize-64 version of s_nearbyint.c.
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This patch replaces s_nearbyint.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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The code is not changed except changes in code style.
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Also adjusted the include path in x86_64 file.
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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---
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sysdeps/ieee754/dbl-64/s_nearbyint.c | 38 ++++++--------
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sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c | 65 ------------------------
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sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c | 2 +-
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3 files changed, 17 insertions(+), 88 deletions(-)
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delete mode 100644 sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c
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Note: tweaked by DJ for backport; some portions handled by glibc-rh1780204-07.patch
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diff -rupN a/sysdeps/ieee754/dbl-64/s_nearbyint.c b/sysdeps/ieee754/dbl-64/s_nearbyint.c
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--- a/sysdeps/ieee754/dbl-64/s_nearbyint.c 2020-04-09 21:17:04.281854809 -0400
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+++ b/sysdeps/ieee754/dbl-64/s_nearbyint.c 2020-04-09 21:28:13.380741798 -0400
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@@ -10,10 +10,6 @@
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* ====================================================
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*/
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-#if defined(LIBM_SCCS) && !defined(lint)
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-static char rcsid[] = "$NetBSD: s_rint.c,v 1.8 1995/05/10 20:48:04 jtc Exp $";
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-#endif
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-
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/*
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* rint(x)
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* Return x rounded to integral value according to the prevailing
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@@ -44,35 +40,33 @@ __nearbyint (double x)
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-4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
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};
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fenv_t env;
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- int32_t i0, j0, sx;
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- double w, t;
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- GET_HIGH_WORD (i0, x);
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- sx = (i0 >> 31) & 1;
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- j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
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- if (j0 < 52)
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+ int64_t i0, sx;
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+ int32_t j0;
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+ EXTRACT_WORDS64 (i0, x);
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+ sx = (i0 >> 63) & 1;
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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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libc_feholdexcept (&env);
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- w = TWO52[sx] + math_opt_barrier (x);
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- t = w - TWO52[sx];
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+ double w = TWO52[sx] + math_opt_barrier (x);
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+ double t = w - TWO52[sx];
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math_force_eval (t);
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libc_fesetenv (&env);
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- GET_HIGH_WORD (i0, t);
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- SET_HIGH_WORD (t, (i0 & 0x7fffffff) | (sx << 31));
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- return t;
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+ return copysign (t, x);
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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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- return x + x; /* inf or NaN */
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+ return x + x; /* inf or NaN */
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else
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- return x; /* x is integral */
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+ return x; /* x is integral */
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}
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libc_feholdexcept (&env);
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- w = TWO52[sx] + math_opt_barrier (x);
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- t = w - TWO52[sx];
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+ double w = TWO52[sx] + math_opt_barrier (x);
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+ double t = w - TWO52[sx];
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math_force_eval (t);
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libc_fesetenv (&env);
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return t;
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diff -rupN a/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c
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--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c 2018-08-01 01:10:47.000000000 -0400
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+++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c 1969-12-31 19:00:00.000000000 -0500
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@@ -1,64 +0,0 @@
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-/* Adapted for use as nearbyint by Ulrich Drepper <drepper@cygnus.com>. */
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-/*
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- * ====================================================
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- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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- *
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- * Developed at SunPro, a Sun Microsystems, Inc. business.
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- * Permission to use, copy, modify, and distribute this
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- * software is freely granted, provided that this notice
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- * is preserved.
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- * ====================================================
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- */
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-
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-/*
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- * rint(x)
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- * Return x rounded to integral value according to the prevailing
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- * rounding mode.
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- * Method:
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- * Using floating addition.
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- * Exception:
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- * Inexact flag raised if x not equal to rint(x).
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- */
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-
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-#include <fenv.h>
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-#include <math.h>
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-#include <math-barriers.h>
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-#include <math_private.h>
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-#include <libm-alias-double.h>
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-
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-static const double
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-TWO52[2]={
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- 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
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- -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
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-};
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-
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-double
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-__nearbyint(double x)
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-{
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- fenv_t env;
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- int64_t i0,sx;
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- int32_t j0;
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- EXTRACT_WORDS64(i0,x);
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- sx = (i0>>63)&1;
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- j0 = ((i0>>52)&0x7ff)-0x3ff;
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- if(__builtin_expect(j0<52, 1)) {
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- if(j0<0) {
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- libc_feholdexcept (&env);
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- double w = TWO52[sx] + math_opt_barrier (x);
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- double t = w-TWO52[sx];
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- math_force_eval (t);
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- libc_fesetenv (&env);
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- return __copysign (t, x);
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- }
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- } else {
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- if(j0==0x400) return x+x; /* inf or NaN */
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- else return x; /* x is integral */
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- }
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- libc_feholdexcept (&env);
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- double w = TWO52[sx] + math_opt_barrier (x);
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- double t = w-TWO52[sx];
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- math_force_eval (t);
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- libc_fesetenv (&env);
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- return t;
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-}
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-libm_alias_double (__nearbyint, nearbyint)
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diff -rupN a/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c b/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c
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--- a/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c 2018-08-01 01:10:47.000000000 -0400
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+++ b/sysdeps/x86_64/fpu/multiarch/s_nearbyint-c.c 2020-04-09 21:28:13.205735274 -0400
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@@ -1,3 +1,3 @@
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#undef __nearbyint
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#define __nearbyint __nearbyint_c
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-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c>
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+#include <sysdeps/ieee754/dbl-64/s_nearbyint.c>
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