Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/cpu/x86/vm/assembler_x86_32.cpp
src/cpu/x86/vm/assembler_x86_32.cpp
- changeset 552
- deadee49286e
- parent 506
- 3d62cb85208d
- child 631
- d1605aabd0a1
- child 777
- 37f87013dfd8
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| 544:9f4457a14b58 | 552:deadee49286e |
|---|---|
| 3403 void MacroAssembler::store_check_part_2(Register obj) { | 3403 void MacroAssembler::store_check_part_2(Register obj) { |
| 3404 BarrierSet* bs = Universe::heap()->barrier_set(); | 3404 BarrierSet* bs = Universe::heap()->barrier_set(); |
| 3405 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); | 3405 assert(bs->kind() == BarrierSet::CardTableModRef, "Wrong barrier set kind"); |
| 3406 CardTableModRefBS* ct = (CardTableModRefBS*)bs; | 3406 CardTableModRefBS* ct = (CardTableModRefBS*)bs; |
| 3407 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); | 3407 assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); |
| 3408 ExternalAddress cardtable((address)ct->byte_map_base); | 3408 |
| 3409 Address index(noreg, obj, Address::times_1); | 3409 // The calculation for byte_map_base is as follows: |
| 3410 | 3410 // byte_map_base = _byte_map - (uintptr_t(low_bound) >> card_shift); |
| 3411 movb(as_Address(ArrayAddress(cardtable, index)), 0); | 3411 // So this essentially converts an address to a displacement and |
| 3412 // it will never need to be relocated. On 64bit however the value may be too | |
| 3413 // large for a 32bit displacement | |
| 3414 | |
| 3415 intptr_t disp = (intptr_t) ct->byte_map_base; | |
| 3416 Address cardtable(noreg, obj, Address::times_1, disp); | |
| 3417 movb(cardtable, 0); | |
| 3412 } | 3418 } |
| 3413 | 3419 |
| 3414 | 3420 |
| 3415 void MacroAssembler::c2bool(Register x) { | 3421 void MacroAssembler::c2bool(Register x) { |
| 3416 // implements x == 0 ? 0 : 1 | 3422 // implements x == 0 ? 0 : 1 |
