[glibc] Always use wordsize-64 version of s_trunc.c.

[Stefan Liebler <stli at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1c94bf0f0a50ce66c808e2ea9b7e417785798b73

commit 1c94bf0f0a50ce66c808e2ea9b7e417785798b73
Author: Stefan Liebler <stli@linux.ibm.com>
Date:   Wed Dec 11 15:09:17 2019 +0100

    Always use wordsize-64 version of s_trunc.c.
    
    This patch replaces s_trunc.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 and sparc64 files.
    
    Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/ieee754/dbl-64/s_trunc.c                   | 25 ++++------
 sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c       | 55 ----------------------
 .../sparc/sparc64/fpu/multiarch/s_trunc-generic.c  |  2 +-
 sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c |  2 +-
 sysdeps/x86_64/fpu/multiarch/s_trunc-c.c           |  2 +-
 5 files changed, 13 insertions(+), 73 deletions(-)

diff --git a/sysdeps/ieee754/dbl-64/s_trunc.c b/sysdeps/ieee754/dbl-64/s_trunc.c
index 154feb9..0de68ce 100644
--- a/sysdeps/ieee754/dbl-64/s_trunc.c
+++ b/sysdeps/ieee754/dbl-64/s_trunc.c
@@ -27,31 +27,26 @@
 double
 __trunc (double x)
 {
-  int32_t i0, j0;
-  uint32_t i1;
-  int sx;
-
-  EXTRACT_WORDS (i0, i1, x);
-  sx = i0 & 0x80000000;
-  j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
-  if (j0 < 20)
+  int64_t i0, j0;
+  int64_t sx;
+
+  EXTRACT_WORDS64 (i0, x);
+  sx = i0 & UINT64_C (0x8000000000000000);
+  j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
+  if (j0 < 52)
     {
       if (j0 < 0)
 	/* The magnitude of the number is < 1 so the result is +-0.  */
-	INSERT_WORDS (x, sx, 0);
+	INSERT_WORDS64 (x, sx);
       else
-	INSERT_WORDS (x, sx | (i0 & ~(0x000fffff >> j0)), 0);
+	INSERT_WORDS64 (x, sx | (i0 & ~(UINT64_C (0x000fffffffffffff) >> j0)));
     }
-  else if (j0 > 51)
+  else
     {
       if (j0 == 0x400)
 	/* x is inf or NaN.  */
 	return x + x;
     }
-  else
-    {
-      INSERT_WORDS (x, i0, i1 & ~(0xffffffffu >> (j0 - 20)));
-    }
 
   return x;
 }
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c
deleted file mode 100644
index 3f040bb..0000000
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* Truncate argument to nearest integral value not larger than the argument.
-   Copyright (C) 1997-2019 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
-   <https://www.gnu.org/licenses/>.  */
-
-#define NO_MATH_REDIRECT
-#include <math.h>
-
-#include <math_private.h>
-#include <libm-alias-double.h>
-
-
-double
-__trunc (double x)
-{
-  int64_t i0, j0;
-  int64_t sx;
-
-  EXTRACT_WORDS64 (i0, x);
-  sx = i0 & UINT64_C(0x8000000000000000);
-  j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
-  if (j0 < 52)
-    {
-      if (j0 < 0)
-	/* The magnitude of the number is < 1 so the result is +-0.  */
-	INSERT_WORDS64 (x, sx);
-      else
-	INSERT_WORDS64 (x, sx | (i0 & ~(UINT64_C(0x000fffffffffffff) >> j0)));
-    }
-  else
-    {
-      if (j0 == 0x400)
-	/* x is inf or NaN.  */
-	return x + x;
-    }
-
-  return x;
-}
-#ifndef __trunc
-libm_alias_double (__trunc, trunc)
-#endif
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-generic.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-generic.c
index 00abd2a..c198ebb 100644
--- a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-generic.c
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-generic.c
@@ -1,2 +1,2 @@
 #define __trunc __trunc_generic
-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c>
+#include <sysdeps/ieee754/dbl-64/s_trunc.c>
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c
index 45646c5..321a9ed 100644
--- a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.c
@@ -20,4 +20,4 @@
 
 #define __trunc __trunc_vis3
 
-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c>
+#include <sysdeps/ieee754/dbl-64/s_trunc.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/s_trunc-c.c b/sysdeps/x86_64/fpu/multiarch/s_trunc-c.c
index 6204ae3..8aa499f 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_trunc-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_trunc-c.c
@@ -1,2 +1,2 @@
 #define __trunc __trunc_c
-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c>
+#include <sysdeps/ieee754/dbl-64/s_trunc.c>