Get rid of lll_robust_trylock.

[platform/upstream/glibc.git] / stdlib / drand48-iter.c

diff --git a/stdlib/drand48-iter.c b/stdlib/drand48-iter.c
index 65e78eb..82e5887 100644 (file)
--- a/stdlib/drand48-iter.c
+++ b/stdlib/drand48-iter.c
@@ -1,28 +1,28 @@
-/* Copyright (C) 1995, 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+/* Copyright (C) 1995-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
 
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   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
-Library General Public License for more details.
+   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 Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
+   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 <errno.h>
 #include <stdlib.h>
 #include <limits.h>
+#include <stdint.h>
 #include <sys/types.h>
 
-/* Global state for non-reentrent functions.  */
+/* Global state for non-reentrant functions.  */
 struct drand48_data __libc_drand48_data;
 
 
@@ -31,51 +31,28 @@ __drand48_iterate (xsubi, buffer)
      unsigned short int xsubi[3];
      struct drand48_data *buffer;
 {
-  u_int64_t X, a, result;
+  uint64_t X;
+  uint64_t result;
 
   /* Initialize buffer, if not yet done.  */
-  if (!buffer->init)
+  if (__glibc_unlikely (!buffer->__init))
     {
-#if (USHRT_MAX == 0xffffU)
-      buffer->a[2] = 0x5;
-      buffer->a[1] = 0xdeec;
-      buffer->a[0] = 0xe66d;
-#else
-      buffer->a[2] = 0x5deecUL;
-      buffer->a[1] = 0xe66d0000UL;
-      buffer->a[0] = 0;
-#endif
-      buffer->c = 0xb;
-      buffer->init = 1;
+      buffer->__a = 0x5deece66dull;
+      buffer->__c = 0xb;
+      buffer->__init = 1;
     }
 
   /* Do the real work.  We choose a data type which contains at least
      48 bits.  Because we compute the modulus it does not care how
      many bits really are computed.  */
 
-  if (sizeof (unsigned short int) == 2)
-    {
-      X = (xsubi[2] << 16 | xsubi[1]) << 16 | xsubi[0];
-      a = (buffer->a[2] << 16 | buffer->a[1]) << 16 | buffer->a[0];
-
-      result = X * a + buffer->c;
-
-      xsubi[0] = result & 0xffff;
-      result >>= 16;
-      xsubi[1] = result & 0xffff;
-      result >>= 16;
-      xsubi[2] = result & 0xffff;
-    }
-  else
-    {
-      X = xsubi[2] << 16 | xsubi[1] >> 16;
-      a = buffer->a[2] << 16 | buffer->a[1] >> 16;
+  X = (uint64_t) xsubi[2] << 32 | (uint32_t) xsubi[1] << 16 | xsubi[0];
 
-      result = X * a + buffer->c;
+  result = X * buffer->__a + buffer->__c;
 
-      xsubi[0] = result >> 16 & 0xffffffffl;
-      xsubi[1] = result << 16 & 0xffff0000l;
-    }
+  xsubi[0] = result & 0xffff;
+  xsubi[1] = (result >> 16) & 0xffff;
+  xsubi[2] = (result >> 32) & 0xffff;
 
   return 0;
 }