Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/cpu/x86/vm/templateTable_x86_32.cpp
src/cpu/x86/vm/templateTable_x86_32.cpp
- changeset 2423
- b1a2afa37ec4
- parent 2314
- f95d63e2154a
- child 2440
- bb8e3b66bde6
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inserted
replaced
| 2420:039eb4201e06 | 2423:b1a2afa37ec4 |
|---|---|
| 1 /* | 1 /* |
| 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | 4 * |
| 5 * This code is free software; you can redistribute it and/or modify it | 5 * This code is free software; you can redistribute it and/or modify it |
| 6 * under the terms of the GNU General Public License version 2 only, as | 6 * under the terms of the GNU General Public License version 2 only, as |
| 7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
| 3201 // (creates a new TLAB, etc.) | 3201 // (creates a new TLAB, etc.) |
| 3202 | 3202 |
| 3203 const bool allow_shared_alloc = | 3203 const bool allow_shared_alloc = |
| 3204 Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode; | 3204 Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode; |
| 3205 | 3205 |
| 3206 const Register thread = rcx; | |
| 3207 if (UseTLAB || allow_shared_alloc) { | |
| 3208 __ get_thread(thread); | |
| 3209 } | |
| 3210 | |
| 3206 if (UseTLAB) { | 3211 if (UseTLAB) { |
| 3207 const Register thread = rcx; | |
| 3208 | |
| 3209 __ get_thread(thread); | |
| 3210 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset()))); | 3212 __ movptr(rax, Address(thread, in_bytes(JavaThread::tlab_top_offset()))); |
| 3211 __ lea(rbx, Address(rax, rdx, Address::times_1)); | 3213 __ lea(rbx, Address(rax, rdx, Address::times_1)); |
| 3212 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset()))); | 3214 __ cmpptr(rbx, Address(thread, in_bytes(JavaThread::tlab_end_offset()))); |
| 3213 __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case); | 3215 __ jcc(Assembler::above, allow_shared_alloc ? allocate_shared : slow_case); |
| 3214 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx); | 3216 __ movptr(Address(thread, in_bytes(JavaThread::tlab_top_offset())), rbx); |
| 3245 // rdx: instance size in bytes | 3247 // rdx: instance size in bytes |
| 3246 __ locked_cmpxchgptr(rbx, heap_top); | 3248 __ locked_cmpxchgptr(rbx, heap_top); |
| 3247 | 3249 |
| 3248 // if someone beat us on the allocation, try again, otherwise continue | 3250 // if someone beat us on the allocation, try again, otherwise continue |
| 3249 __ jcc(Assembler::notEqual, retry); | 3251 __ jcc(Assembler::notEqual, retry); |
| 3252 | |
| 3253 __ incr_allocated_bytes(thread, rdx, 0); | |
| 3250 } | 3254 } |
| 3251 | 3255 |
| 3252 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) { | 3256 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) { |
| 3253 // The object is initialized before the header. If the object size is | 3257 // The object is initialized before the header. If the object size is |
| 3254 // zero, go directly to the header initialization. | 3258 // zero, go directly to the header initialization. |
| 3255 __ bind(initialize_object); | 3259 __ bind(initialize_object); |
| 3256 __ decrement(rdx, sizeof(oopDesc)); | 3260 __ decrement(rdx, sizeof(oopDesc)); |
| 3257 __ jcc(Assembler::zero, initialize_header); | 3261 __ jcc(Assembler::zero, initialize_header); |
| 3258 | 3262 |
| 3259 // Initialize topmost object field, divide rdx by 8, check if odd and | 3263 // Initialize topmost object field, divide rdx by 8, check if odd and |
| 3260 // test if zero. | 3264 // test if zero. |
| 3261 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) | 3265 __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code) |
| 3262 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd | 3266 __ shrl(rdx, LogBytesPerLong); // divide by 2*oopSize and set carry flag if odd |
| 3263 | 3267 |
| 3264 // rdx must have been multiple of 8 | 3268 // rdx must have been multiple of 8 |
| 3265 #ifdef ASSERT | 3269 #ifdef ASSERT |
| 3266 // make sure rdx was multiple of 8 | 3270 // make sure rdx was multiple of 8 |
| 3267 Label L; | 3271 Label L; |
| 3268 // Ignore partial flag stall after shrl() since it is debug VM | 3272 // Ignore partial flag stall after shrl() since it is debug VM |
| 3269 __ jccb(Assembler::carryClear, L); | 3273 __ jccb(Assembler::carryClear, L); |
