author | eosterlund |
Thu, 17 May 2018 11:56:21 +0200 | |
changeset 50164 | 88bf53770be5 |
parent 49929 | f38329fe8055 |
child 51996 | 84743156e780 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "asm/macroAssembler.hpp" |
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#include "gc/shared/barrierSet.hpp" |
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#include "gc/shared/barrierSetAssembler.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "prims/jniFastGetField.hpp" |
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#include "prims/jvm_misc.hpp" |
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#include "runtime/safepoint.hpp" |
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#define __ masm-> |
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#define BUFFER_SIZE 30*wordSize |
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// Instead of issuing lfence for LoadLoad barrier, we create data dependency |
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// between loads, which is more efficient than lfence. |
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// Common register usage: |
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// rax/xmm0: result |
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// c_rarg0: jni env |
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// c_rarg1: obj |
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// c_rarg2: jfield id |
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||
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static const Register rtmp = r8; |
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static const Register robj = r9; |
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static const Register rcounter = r10; |
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static const Register roffset = r11; |
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static const Register rcounter_addr = r11; |
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// Warning: do not use rip relative addressing after the first counter load |
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// since that may scratch r10! |
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address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) { |
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const char *name = NULL; |
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switch (type) { |
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case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break; |
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case T_BYTE: name = "jni_fast_GetByteField"; break; |
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case T_CHAR: name = "jni_fast_GetCharField"; break; |
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case T_SHORT: name = "jni_fast_GetShortField"; break; |
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case T_INT: name = "jni_fast_GetIntField"; break; |
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case T_LONG: name = "jni_fast_GetLongField"; break; |
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default: ShouldNotReachHere(); |
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} |
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ResourceMark rm; |
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BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE); |
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CodeBuffer cbuf(blob); |
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MacroAssembler* masm = new MacroAssembler(&cbuf); |
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address fast_entry = __ pc(); |
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Label slow; |
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ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); |
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__ mov32 (rcounter, counter); |
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__ mov (robj, c_rarg1); |
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__ testb (rcounter, 1); |
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__ jcc (Assembler::notZero, slow); |
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if (os::is_MP()) { |
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__ xorptr(robj, rcounter); |
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__ xorptr(robj, rcounter); // obj, since |
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// robj ^ rcounter ^ rcounter == robj |
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// robj is data dependent on rcounter. |
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} |
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__ mov (roffset, c_rarg2); |
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__ shrptr(roffset, 2); // offset |
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// Both robj and rtmp are clobbered by try_resolve_jobject_in_native. |
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BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); |
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bs->try_resolve_jobject_in_native(masm, /* jni_env */ c_rarg0, robj, rtmp, slow); |
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DEBUG_ONLY(__ movl(rtmp, 0xDEADC0DE);) |
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assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); |
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speculative_load_pclist[count] = __ pc(); |
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switch (type) { |
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case T_BOOLEAN: __ movzbl (rax, Address(robj, roffset, Address::times_1)); break; |
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case T_BYTE: __ movsbl (rax, Address(robj, roffset, Address::times_1)); break; |
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case T_CHAR: __ movzwl (rax, Address(robj, roffset, Address::times_1)); break; |
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case T_SHORT: __ movswl (rax, Address(robj, roffset, Address::times_1)); break; |
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case T_INT: __ movl (rax, Address(robj, roffset, Address::times_1)); break; |
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case T_LONG: __ movq (rax, Address(robj, roffset, Address::times_1)); break; |
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default: ShouldNotReachHere(); |
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} |
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if (os::is_MP()) { |
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__ lea(rcounter_addr, counter); |
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// ca is data dependent on rax. |
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__ xorptr(rcounter_addr, rax); |
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__ xorptr(rcounter_addr, rax); |
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__ cmpl (rcounter, Address(rcounter_addr, 0)); |
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} else { |
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__ cmp32 (rcounter, counter); |
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} |
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__ jcc (Assembler::notEqual, slow); |
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__ ret (0); |
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slowcase_entry_pclist[count++] = __ pc(); |
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__ bind (slow); |
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address slow_case_addr = NULL; |
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switch (type) { |
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case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break; |
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case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break; |
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case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break; |
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case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break; |
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case T_INT: slow_case_addr = jni_GetIntField_addr(); break; |
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case T_LONG: slow_case_addr = jni_GetLongField_addr(); break; |
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default: break; |
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} |
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// tail call |
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__ jump (ExternalAddress(slow_case_addr)); |
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__ flush (); |
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return fast_entry; |
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} |
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address JNI_FastGetField::generate_fast_get_boolean_field() { |
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return generate_fast_get_int_field0(T_BOOLEAN); |
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} |
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address JNI_FastGetField::generate_fast_get_byte_field() { |
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return generate_fast_get_int_field0(T_BYTE); |
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} |
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address JNI_FastGetField::generate_fast_get_char_field() { |
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return generate_fast_get_int_field0(T_CHAR); |
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} |
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address JNI_FastGetField::generate_fast_get_short_field() { |
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return generate_fast_get_int_field0(T_SHORT); |
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} |
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address JNI_FastGetField::generate_fast_get_int_field() { |
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return generate_fast_get_int_field0(T_INT); |
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} |
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address JNI_FastGetField::generate_fast_get_long_field() { |
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return generate_fast_get_int_field0(T_LONG); |
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} |
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address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) { |
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const char *name = NULL; |
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switch (type) { |
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case T_FLOAT: name = "jni_fast_GetFloatField"; break; |
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case T_DOUBLE: name = "jni_fast_GetDoubleField"; break; |
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default: ShouldNotReachHere(); |
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} |
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ResourceMark rm; |
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BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE); |
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CodeBuffer cbuf(blob); |
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MacroAssembler* masm = new MacroAssembler(&cbuf); |
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address fast_entry = __ pc(); |
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Label slow; |
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ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); |
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__ mov32 (rcounter, counter); |
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__ mov (robj, c_rarg1); |
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__ testb (rcounter, 1); |
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__ jcc (Assembler::notZero, slow); |
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if (os::is_MP()) { |
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__ xorptr(robj, rcounter); |
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__ xorptr(robj, rcounter); // obj, since |
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// robj ^ rcounter ^ rcounter == robj |
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// robj is data dependent on rcounter. |
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} |
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// Both robj and rtmp are clobbered by try_resolve_jobject_in_native. |
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BarrierSetAssembler* bs = BarrierSet::barrier_set()->barrier_set_assembler(); |
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bs->try_resolve_jobject_in_native(masm, /* jni_env */ c_rarg0, robj, rtmp, slow); |
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DEBUG_ONLY(__ movl(rtmp, 0xDEADC0DE);) |
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__ mov (roffset, c_rarg2); |
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__ shrptr(roffset, 2); // offset |
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assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); |
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speculative_load_pclist[count] = __ pc(); |
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switch (type) { |
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case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break; |
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case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break; |
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default: ShouldNotReachHere(); |
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} |
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if (os::is_MP()) { |
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__ lea(rcounter_addr, counter); |
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__ movdq (rax, xmm0); |
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// counter address is data dependent on xmm0. |
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__ xorptr(rcounter_addr, rax); |
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__ xorptr(rcounter_addr, rax); |
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__ cmpl (rcounter, Address(rcounter_addr, 0)); |
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} else { |
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__ cmp32 (rcounter, counter); |
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} |
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__ jcc (Assembler::notEqual, slow); |
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__ ret (0); |
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slowcase_entry_pclist[count++] = __ pc(); |
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__ bind (slow); |
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address slow_case_addr = NULL; |
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switch (type) { |
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case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break; |
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case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break; |
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default: break; |
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} |
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// tail call |
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__ jump (ExternalAddress(slow_case_addr)); |
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__ flush (); |
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return fast_entry; |
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} |
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address JNI_FastGetField::generate_fast_get_float_field() { |
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return generate_fast_get_float_field0(T_FLOAT); |
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} |
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address JNI_FastGetField::generate_fast_get_double_field() { |
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return generate_fast_get_float_field0(T_DOUBLE); |
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} |