From: khizmax <libcds.dev@gmail.com>
Date: Mon, 19 Sep 2016 19:09:45 +0000 (+0300)
Subject: gcc-4.8 does not supported std::atomic for 128-bit types
X-Git-Tag: v2.2.0~126
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=libcds.git;a=commitdiff_plain;h=498ddefc0af22f069d38a993373eed2a297a6c86

gcc-4.8 does not supported std::atomic for 128-bit types
---

diff --git a/cds/compiler/gcc/defs.h b/cds/compiler/gcc/defs.h
index e2c3b764..99d8589c 100644
--- a/cds/compiler/gcc/defs.h
+++ b/cds/compiler/gcc/defs.h
@@ -104,7 +104,8 @@
 
 // double-width CAS support
 #if CDS_BUILD_BITS == 64
-#   ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
+    // gcc-4.8 does not support 16-word (128bit) atomics
+#   if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 ) && CDS_COMPILER_VERSION >= 40900
 #       define CDS_DCAS_SUPPORT
 #   endif
 #else
diff --git a/test/stress/freelist/put_get.cpp b/test/stress/freelist/put_get.cpp
index 08593617..15173a9b 100644
--- a/test/stress/freelist/put_get.cpp
+++ b/test/stress/freelist/put_get.cpp
@@ -164,6 +164,7 @@ namespace {
     typedef cds::intrusive::CachedFreeList<cds::intrusive::FreeList> cached_free_list;
     CDSSTRESS_FREELIST_F( CachedFreeList, cached_free_list )
 
+#ifdef CDS_DCAS_SUPPORT
     TEST_F( put_get, TaggetFreeList )
     {
         struct tagged_ptr {
@@ -179,5 +180,6 @@ namespace {
         else
             std::cout << "Double-width CAS is not supported\n";
     }
+#endif
 
 } // namespace
diff --git a/test/stress/freelist/put_get_single.cpp b/test/stress/freelist/put_get_single.cpp
index c7d33358..7775378e 100644
--- a/test/stress/freelist/put_get_single.cpp
+++ b/test/stress/freelist/put_get_single.cpp
@@ -144,6 +144,7 @@ namespace {
     typedef cds::intrusive::CachedFreeList<cds::intrusive::FreeList> cached_free_list;
     CDSSTRESS_FREELIST_F( CachedFreeList, cached_free_list )
 
+#ifdef CDS_DCAS_SUPPORT
     TEST_F( put_get_single, TaggetFreeList )
     {
         struct tagged_ptr {
@@ -159,5 +160,6 @@ namespace {
         else
             std::cout << "Double-width CAS is not supported\n";
     }
+#endif
 
 } // namespace