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6703888: Compressed Oops: use the 32-bits gap after klass in a object

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Use the gap also for a narrow oop field and a boxing object value.

Reviewed-by: coleenp, never
This commit is contained in:
Vladimir Kozlov 2008-05-21 16:31:35 -07:00
parent 76035424de
commit e53e767d88
13 changed files with 67 additions and 72 deletions
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8
hotspot/src/share/vm/classfile/javaClasses.hpp
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@ -653,6 +653,7 @@ class java_lang_boxing_object: AllStatic {
hc_value_offset = 0
};
static int value_offset;
static int long_value_offset;
static oop initialize_and_allocate(BasicType type, TRAPS);
public:
@ -665,7 +666,10 @@ class java_lang_boxing_object: AllStatic {
static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
static int value_offset_in_bytes() { return value_offset; }
static int value_offset_in_bytes(BasicType type) {
return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
value_offset;
}
// Debugging
friend class JavaClasses;
@ -747,7 +751,7 @@ class java_lang_ref_SoftReference: public java_lang_ref_Reference {
public:
enum {
// The timestamp is a long field and may need to be adjusted for alignment.
hc_timestamp_offset = align_object_offset_(hc_discovered_offset + 1)
hc_timestamp_offset = hc_discovered_offset + 1
};
enum {
hc_static_clock_offset = 0