8355473: Clean up x86 globals/VM_Version after 32-bit x86 removal

Reviewed-by: chagedorn, coleenp, jwaters

Author: shipilev

src/hotspot/cpu/x86/globalDefinitions_x86.hpp

@@ -34,25 +34,19 @@ const bool CCallingConventionRequiresIntsAsLongs = false;
 
 #define SUPPORTS_NATIVE_CX8
 
-#ifdef _LP64
 #define SUPPORT_MONITOR_COUNT
-#endif
 
 #define CPU_MULTI_COPY_ATOMIC
 
 // The expected size in bytes of a cache line.
 #define DEFAULT_CACHE_LINE_SIZE 64
 
 // The default padding size for data structures to avoid false sharing.
-#ifdef _LP64
 // The common wisdom is that adjacent cache line prefetchers on some hardware
 // may pull two cache lines on access, so we have to pessimistically assume twice
 // the cache line size for padding. TODO: Check if this is still true for modern
 // hardware. If not, DEFAULT_CACHE_LINE_SIZE might as well suffice.
 #define DEFAULT_PADDING_SIZE (DEFAULT_CACHE_LINE_SIZE*2)
-#else
-#define DEFAULT_PADDING_SIZE DEFAULT_CACHE_LINE_SIZE
-#endif
 
 #if defined(LINUX) || defined(__APPLE__)
 #define SUPPORT_RESERVED_STACK_AREA

src/hotspot/cpu/x86/globals_x86.hpp

@@ -61,29 +61,19 @@ define_pd_global(intx, InlineSmallCode,          1000);
 #define MIN_STACK_RED_PAGES DEFAULT_STACK_RED_PAGES
 #define MIN_STACK_RESERVED_PAGES (0)
 
-#ifdef _LP64
 // Java_java_net_SocketOutputStream_socketWrite0() uses a 64k buffer on the
-// stack if compiled for unix and LP64. To pass stack overflow tests we need
-// 20 shadow pages.
+// stack if compiled for unix. To pass stack overflow tests we need 20 shadow pages.
 #define DEFAULT_STACK_SHADOW_PAGES (NOT_WIN64(20) WIN64_ONLY(8) DEBUG_ONLY(+4))
 // For those clients that do not use write socket, we allow
 // the min range value to be below that of the default
 #define MIN_STACK_SHADOW_PAGES (NOT_WIN64(10) WIN64_ONLY(8) DEBUG_ONLY(+4))
-#else
-#define DEFAULT_STACK_SHADOW_PAGES (4 DEBUG_ONLY(+5))
-#define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES
-#endif // _LP64
 
 define_pd_global(intx, StackYellowPages, DEFAULT_STACK_YELLOW_PAGES);
 define_pd_global(intx, StackRedPages, DEFAULT_STACK_RED_PAGES);
 define_pd_global(intx, StackShadowPages, DEFAULT_STACK_SHADOW_PAGES);
 define_pd_global(intx, StackReservedPages, DEFAULT_STACK_RESERVED_PAGES);
 
-#ifdef _LP64
 define_pd_global(bool, VMContinuations, true);
-#else
-define_pd_global(bool, VMContinuations, false);
-#endif
 
 define_pd_global(bool, RewriteBytecodes,     true);
 define_pd_global(bool, RewriteFrequentPairs, true);