[gcc r16-4304] libstdc++: Remove unused config/cpu/cris/atomicity.h file [PR122172]

[Jonathan Wakely]

https://gcc.gnu.org/g:bca9dd11059bbcdb3bcc0d8d8dfc29a499e228a8

commit r16-4304-gbca9dd11059bbcdb3bcc0d8d8dfc29a499e228a8
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Oct 7 15:06:43 2025 +0100

    libstdc++: Remove unused config/cpu/cris/atomicity.h file [PR122172]
    
    This file is no longer used, because we always use the definitions in
    config/cpu/generic/atomicity_builtins/atomicity.h now.
    
    H-P confirmed that the code generated by __atomic_fetch_add is fine and
    we don't need the handwritten assembly.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/122172
            * config/cpu/cris/atomicity.h: Removed.
    
    Reviewed-by: Hans-Peter Nilsson <hp@axis.com>

Diff:
---
 libstdc++-v3/config/cpu/cris/atomicity.h | 89 --------------------------------
 1 file changed, 89 deletions(-)

diff --git a/libstdc++-v3/config/cpu/cris/atomicity.h b/libstdc++-v3/config/cpu/cris/atomicity.h
deleted file mode 100644
index 9d3cec403a14..000000000000
--- a/libstdc++-v3/config/cpu/cris/atomicity.h
+++ /dev/null
@@ -1,89 +0,0 @@
-// Low-level functions for atomic operations: CRIS version  -*- C++ -*-
-
-// Copyright (C) 2001-2025 Free Software Foundation, Inc.
-//
-// This file is part of the GNU ISO C++ Library.  This library is free
-// software; you can redistribute it and/or modify it under the
-// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 3, or (at your option)
-// any later version.
-
-// This 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 General Public License for more details.
-
-// Under Section 7 of GPL version 3, you are granted additional
-// permissions described in the GCC Runtime Library Exception, version
-// 3.1, as published by the Free Software Foundation.
-
-// You should have received a copy of the GNU General Public License and
-// a copy of the GCC Runtime Library Exception along with this program;
-// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
-// <http://www.gnu.org/licenses/>.
-
-#include <ext/atomicity.h>
-
-namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
-{
-_GLIBCXX_BEGIN_NAMESPACE_VERSION
-
-  _Atomic_word
-  __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
-  {
-    int __tmp;
-    _Atomic_word __result;
-
-#if (__CRIS_arch_version >= 32)
-  __asm__ __volatile__ (" clearf p	       \n"
-		       "0:		       \n"
-		       " move.d %4,%2	       \n"
-		       " move.d [%3],%0	       \n"
-		       " add.d %0,%2	       \n"
-		       " ax		       \n"
-		       " move.d %2,[%3]	       \n"
-		       " bcs 0b		       \n"
-		       " clearf p	       \n"
-		       :  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
-		       : "r" (__mem), "g" (__val), "Q" (*__mem)
-		       : "memory");
-#elif (__CRIS_arch_version >= 10)
-    __asm__ __volatile__ (" clearf		\n"
-			"0:			\n"
-			" move.d %4,%2		\n"
-			" move.d [%3],%0	\n"
-			" add.d %0,%2		\n"
-			" ax			\n"
-			" move.d %2,[%3]	\n"
-			" bwf 0b		\n"
-			" clearf		\n"
-			:  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
-			: "r" (__mem), "g" (__val), "Q" (*__mem)
-			/* The memory clobber must stay, regardless of
-			   current uses of this function.  */
-			: "memory");
-#else
-    __asm__ __volatile__ (" move $ccr,$r9	\n"
-			" di			\n"
-			" move.d %4,%2		\n"
-			" move.d [%3],%0	\n"
-			" add.d %0,%2		\n"
-			" move.d %2,[%3]	\n"
-			" move $r9,$ccr		\n"
-			:  "=&r" (__result), "=Q" (*__mem), "=&r" (__tmp)
-			: "r" (__mem), "g" (__val), "Q" (*__mem)
-			: "r9",
-			  /* The memory clobber must stay, regardless of
-			     current uses of this function.  */
-			  "memory");
-#endif
-
-    return __result;
-  }
-
-  void
-  __atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
-  { __exchange_and_add(__mem, __val); }
-
-_GLIBCXX_END_NAMESPACE_VERSION
-} // namespace