Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/oops/oop.inline.hpp
src/share/vm/oops/oop.inline.hpp
- changeset 1082
- bd441136a5ce
- parent 1014
- 0fbdb4381b99
- parent 1077
- 660978a2a31a
- child 1145
- e5b0439ef4ae
equal
deleted
inserted
replaced
| 1075:ba50942c8138 | 1082:bd441136a5ce |
|---|---|
| 146 // offset from the heap base. Saving the check for null can save instructions | 146 // offset from the heap base. Saving the check for null can save instructions |
| 147 // in inner GC loops so these are separated. | 147 // in inner GC loops so these are separated. |
| 148 | 148 |
| 149 inline narrowOop oopDesc::encode_heap_oop_not_null(oop v) { | 149 inline narrowOop oopDesc::encode_heap_oop_not_null(oop v) { |
| 150 assert(!is_null(v), "oop value can never be zero"); | 150 assert(!is_null(v), "oop value can never be zero"); |
| 151 address heap_base = Universe::heap_base(); | 151 address base = Universe::narrow_oop_base(); |
| 152 uint64_t pd = (uint64_t)(pointer_delta((void*)v, (void*)heap_base, 1)); | 152 int shift = Universe::narrow_oop_shift(); |
| 153 uint64_t pd = (uint64_t)(pointer_delta((void*)v, (void*)base, 1)); | |
| 153 assert(OopEncodingHeapMax > pd, "change encoding max if new encoding"); | 154 assert(OopEncodingHeapMax > pd, "change encoding max if new encoding"); |
| 154 uint64_t result = pd >> LogMinObjAlignmentInBytes; | 155 uint64_t result = pd >> shift; |
| 155 assert((result & CONST64(0xffffffff00000000)) == 0, "narrow oop overflow"); | 156 assert((result & CONST64(0xffffffff00000000)) == 0, "narrow oop overflow"); |
| 156 return (narrowOop)result; | 157 return (narrowOop)result; |
| 157 } | 158 } |
| 158 | 159 |
| 159 inline narrowOop oopDesc::encode_heap_oop(oop v) { | 160 inline narrowOop oopDesc::encode_heap_oop(oop v) { |
| 160 return (is_null(v)) ? (narrowOop)0 : encode_heap_oop_not_null(v); | 161 return (is_null(v)) ? (narrowOop)0 : encode_heap_oop_not_null(v); |
| 161 } | 162 } |
| 162 | 163 |
| 163 inline oop oopDesc::decode_heap_oop_not_null(narrowOop v) { | 164 inline oop oopDesc::decode_heap_oop_not_null(narrowOop v) { |
| 164 assert(!is_null(v), "narrow oop value can never be zero"); | 165 assert(!is_null(v), "narrow oop value can never be zero"); |
| 165 address heap_base = Universe::heap_base(); | 166 address base = Universe::narrow_oop_base(); |
| 166 return (oop)(void*)((uintptr_t)heap_base + ((uintptr_t)v << LogMinObjAlignmentInBytes)); | 167 int shift = Universe::narrow_oop_shift(); |
| 168 return (oop)(void*)((uintptr_t)base + ((uintptr_t)v << shift)); | |
| 167 } | 169 } |
| 168 | 170 |
| 169 inline oop oopDesc::decode_heap_oop(narrowOop v) { | 171 inline oop oopDesc::decode_heap_oop(narrowOop v) { |
| 170 return is_null(v) ? (oop)NULL : decode_heap_oop_not_null(v); | 172 return is_null(v) ? (oop)NULL : decode_heap_oop_not_null(v); |
| 171 } | 173 } |
