| /* |
| * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "asm/macroAssembler.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "prims/jniFastGetField.hpp" |
| #include "prims/jvm_misc.hpp" |
| #include "runtime/safepoint.hpp" |
| |
| #define __ masm-> |
| |
| #define BUFFER_SIZE 30 |
| |
| #ifdef _WINDOWS |
| GetBooleanField_t JNI_FastGetField::jni_fast_GetBooleanField_fp; |
| GetByteField_t JNI_FastGetField::jni_fast_GetByteField_fp; |
| GetCharField_t JNI_FastGetField::jni_fast_GetCharField_fp; |
| GetShortField_t JNI_FastGetField::jni_fast_GetShortField_fp; |
| GetIntField_t JNI_FastGetField::jni_fast_GetIntField_fp; |
| GetLongField_t JNI_FastGetField::jni_fast_GetLongField_fp; |
| GetFloatField_t JNI_FastGetField::jni_fast_GetFloatField_fp; |
| GetDoubleField_t JNI_FastGetField::jni_fast_GetDoubleField_fp; |
| #endif |
| |
| // Instead of issuing lfence for LoadLoad barrier, we create data dependency |
| // between loads, which is much more efficient than lfence. |
| |
| address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) { |
| const char *name = NULL; |
| switch (type) { |
| case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break; |
| case T_BYTE: name = "jni_fast_GetByteField"; break; |
| case T_CHAR: name = "jni_fast_GetCharField"; break; |
| case T_SHORT: name = "jni_fast_GetShortField"; break; |
| case T_INT: name = "jni_fast_GetIntField"; break; |
| default: ShouldNotReachHere(); |
| } |
| ResourceMark rm; |
| BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize); |
| CodeBuffer cbuf(blob); |
| MacroAssembler* masm = new MacroAssembler(&cbuf); |
| address fast_entry = __ pc(); |
| |
| Label slow; |
| |
| // stack layout: offset from rsp (in words): |
| // return pc 0 |
| // jni env 1 |
| // obj 2 |
| // jfieldID 3 |
| |
| ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); |
| __ mov32 (rcx, counter); |
| __ testb (rcx, 1); |
| __ jcc (Assembler::notZero, slow); |
| if (os::is_MP()) { |
| __ mov(rax, rcx); |
| __ andptr(rax, 1); // rax, must end up 0 |
| __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize)); |
| // obj, notice rax, is 0. |
| // rdx is data dependent on rcx. |
| } else { |
| __ movptr (rdx, Address(rsp, 2*wordSize)); // obj |
| } |
| __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID |
| __ movptr(rdx, Address(rdx, 0)); // *obj |
| __ shrptr (rax, 2); // offset |
| |
| assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); |
| speculative_load_pclist[count] = __ pc(); |
| switch (type) { |
| case T_BOOLEAN: __ movzbl (rax, Address(rdx, rax, Address::times_1)); break; |
| case T_BYTE: __ movsbl (rax, Address(rdx, rax, Address::times_1)); break; |
| case T_CHAR: __ movzwl (rax, Address(rdx, rax, Address::times_1)); break; |
| case T_SHORT: __ movswl (rax, Address(rdx, rax, Address::times_1)); break; |
| case T_INT: __ movl (rax, Address(rdx, rax, Address::times_1)); break; |
| default: ShouldNotReachHere(); |
| } |
| |
| Address ca1; |
| if (os::is_MP()) { |
| __ lea(rdx, counter); |
| __ xorptr(rdx, rax); |
| __ xorptr(rdx, rax); |
| __ cmp32(rcx, Address(rdx, 0)); |
| // ca1 is the same as ca because |
| // rax, ^ counter_addr ^ rax, = address |
| // ca1 is data dependent on rax,. |
| } else { |
| __ cmp32(rcx, counter); |
| } |
| __ jcc (Assembler::notEqual, slow); |
| |
| #ifndef _WINDOWS |
| __ ret (0); |
| #else |
| // __stdcall calling convention |
| __ ret (3*wordSize); |
| #endif |
| |
| slowcase_entry_pclist[count++] = __ pc(); |
| __ bind (slow); |
| address slow_case_addr = NULL; |
| switch (type) { |
| case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break; |
| case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break; |
| case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break; |
| case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break; |
| case T_INT: slow_case_addr = jni_GetIntField_addr(); |
| } |
| // tail call |
| __ jump (ExternalAddress(slow_case_addr)); |
| |
| __ flush (); |
| |
| #ifndef _WINDOWS |
| return fast_entry; |
| #else |
| switch (type) { |
| case T_BOOLEAN: jni_fast_GetBooleanField_fp = (GetBooleanField_t) fast_entry; break; |
| case T_BYTE: jni_fast_GetByteField_fp = (GetByteField_t) fast_entry; break; |
| case T_CHAR: jni_fast_GetCharField_fp = (GetCharField_t) fast_entry; break; |
| case T_SHORT: jni_fast_GetShortField_fp = (GetShortField_t) fast_entry; break; |
| case T_INT: jni_fast_GetIntField_fp = (GetIntField_t) fast_entry; break; |
| } |
| return os::win32::fast_jni_accessor_wrapper(type); |
| #endif |
| } |
| |
| address JNI_FastGetField::generate_fast_get_boolean_field() { |
| return generate_fast_get_int_field0(T_BOOLEAN); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_byte_field() { |
| return generate_fast_get_int_field0(T_BYTE); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_char_field() { |
| return generate_fast_get_int_field0(T_CHAR); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_short_field() { |
| return generate_fast_get_int_field0(T_SHORT); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_int_field() { |
| return generate_fast_get_int_field0(T_INT); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_long_field() { |
| const char *name = "jni_fast_GetLongField"; |
| ResourceMark rm; |
| BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize); |
| CodeBuffer cbuf(blob); |
| MacroAssembler* masm = new MacroAssembler(&cbuf); |
| address fast_entry = __ pc(); |
| |
| Label slow; |
| |
| // stack layout: offset from rsp (in words): |
| // old rsi 0 |
| // return pc 1 |
| // jni env 2 |
| // obj 3 |
| // jfieldID 4 |
| |
| ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); |
| |
| __ push (rsi); |
| __ mov32 (rcx, counter); |
| __ testb (rcx, 1); |
| __ jcc (Assembler::notZero, slow); |
| if (os::is_MP()) { |
| __ mov(rax, rcx); |
| __ andptr(rax, 1); // rax, must end up 0 |
| __ movptr(rdx, Address(rsp, rax, Address::times_1, 3*wordSize)); |
| // obj, notice rax, is 0. |
| // rdx is data dependent on rcx. |
| } else { |
| __ movptr(rdx, Address(rsp, 3*wordSize)); // obj |
| } |
| __ movptr(rsi, Address(rsp, 4*wordSize)); // jfieldID |
| __ movptr(rdx, Address(rdx, 0)); // *obj |
| __ shrptr(rsi, 2); // offset |
| |
| assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small"); |
| speculative_load_pclist[count++] = __ pc(); |
| __ movptr(rax, Address(rdx, rsi, Address::times_1)); |
| #ifndef _LP64 |
| speculative_load_pclist[count] = __ pc(); |
| __ movl(rdx, Address(rdx, rsi, Address::times_1, 4)); |
| #endif // _LP64 |
| |
| if (os::is_MP()) { |
| __ lea(rsi, counter); |
| __ xorptr(rsi, rdx); |
| __ xorptr(rsi, rax); |
| __ xorptr(rsi, rdx); |
| __ xorptr(rsi, rax); |
| __ cmp32(rcx, Address(rsi, 0)); |
| // ca1 is the same as ca because |
| // rax, ^ rdx ^ counter_addr ^ rax, ^ rdx = address |
| // ca1 is data dependent on both rax, and rdx. |
| } else { |
| __ cmp32(rcx, counter); |
| } |
| __ jcc (Assembler::notEqual, slow); |
| |
| __ pop (rsi); |
| |
| #ifndef _WINDOWS |
| __ ret (0); |
| #else |
| // __stdcall calling convention |
| __ ret (3*wordSize); |
| #endif |
| |
| slowcase_entry_pclist[count-1] = __ pc(); |
| slowcase_entry_pclist[count++] = __ pc(); |
| __ bind (slow); |
| __ pop (rsi); |
| address slow_case_addr = jni_GetLongField_addr();; |
| // tail call |
| __ jump (ExternalAddress(slow_case_addr)); |
| |
| __ flush (); |
| |
| #ifndef _WINDOWS |
| return fast_entry; |
| #else |
| jni_fast_GetLongField_fp = (GetLongField_t) fast_entry; |
| return os::win32::fast_jni_accessor_wrapper(T_LONG); |
| #endif |
| } |
| |
| address JNI_FastGetField::generate_fast_get_float_field0(BasicType type) { |
| const char *name = NULL; |
| switch (type) { |
| case T_FLOAT: name = "jni_fast_GetFloatField"; break; |
| case T_DOUBLE: name = "jni_fast_GetDoubleField"; break; |
| default: ShouldNotReachHere(); |
| } |
| ResourceMark rm; |
| BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE*wordSize); |
| CodeBuffer cbuf(blob); |
| MacroAssembler* masm = new MacroAssembler(&cbuf); |
| address fast_entry = __ pc(); |
| |
| Label slow_with_pop, slow; |
| |
| // stack layout: offset from rsp (in words): |
| // return pc 0 |
| // jni env 1 |
| // obj 2 |
| // jfieldID 3 |
| |
| ExternalAddress counter(SafepointSynchronize::safepoint_counter_addr()); |
| |
| __ mov32 (rcx, counter); |
| __ testb (rcx, 1); |
| __ jcc (Assembler::notZero, slow); |
| if (os::is_MP()) { |
| __ mov(rax, rcx); |
| __ andptr(rax, 1); // rax, must end up 0 |
| __ movptr(rdx, Address(rsp, rax, Address::times_1, 2*wordSize)); |
| // obj, notice rax, is 0. |
| // rdx is data dependent on rcx. |
| } else { |
| __ movptr(rdx, Address(rsp, 2*wordSize)); // obj |
| } |
| __ movptr(rax, Address(rsp, 3*wordSize)); // jfieldID |
| __ movptr(rdx, Address(rdx, 0)); // *obj |
| __ shrptr(rax, 2); // offset |
| |
| assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); |
| speculative_load_pclist[count] = __ pc(); |
| switch (type) { |
| #ifndef _LP64 |
| case T_FLOAT: __ fld_s (Address(rdx, rax, Address::times_1)); break; |
| case T_DOUBLE: __ fld_d (Address(rdx, rax, Address::times_1)); break; |
| #else |
| case T_FLOAT: __ movflt (xmm0, Address(robj, roffset, Address::times_1)); break; |
| case T_DOUBLE: __ movdbl (xmm0, Address(robj, roffset, Address::times_1)); break; |
| #endif // _LP64 |
| default: ShouldNotReachHere(); |
| } |
| |
| Address ca1; |
| if (os::is_MP()) { |
| __ fst_s (Address(rsp, -4)); |
| __ lea(rdx, counter); |
| __ movl (rax, Address(rsp, -4)); |
| // garbage hi-order bits on 64bit are harmless. |
| __ xorptr(rdx, rax); |
| __ xorptr(rdx, rax); |
| __ cmp32(rcx, Address(rdx, 0)); |
| // rax, ^ counter_addr ^ rax, = address |
| // ca1 is data dependent on the field |
| // access. |
| } else { |
| __ cmp32(rcx, counter); |
| } |
| __ jcc (Assembler::notEqual, slow_with_pop); |
| |
| #ifndef _WINDOWS |
| __ ret (0); |
| #else |
| // __stdcall calling convention |
| __ ret (3*wordSize); |
| #endif |
| |
| __ bind (slow_with_pop); |
| // invalid load. pop FPU stack. |
| __ fstp_d (0); |
| |
| slowcase_entry_pclist[count++] = __ pc(); |
| __ bind (slow); |
| address slow_case_addr = NULL; |
| switch (type) { |
| case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break; |
| case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break; |
| default: ShouldNotReachHere(); |
| } |
| // tail call |
| __ jump (ExternalAddress(slow_case_addr)); |
| |
| __ flush (); |
| |
| #ifndef _WINDOWS |
| return fast_entry; |
| #else |
| switch (type) { |
| case T_FLOAT: jni_fast_GetFloatField_fp = (GetFloatField_t) fast_entry; break; |
| case T_DOUBLE: jni_fast_GetDoubleField_fp = (GetDoubleField_t) fast_entry; break; |
| } |
| return os::win32::fast_jni_accessor_wrapper(type); |
| #endif |
| } |
| |
| address JNI_FastGetField::generate_fast_get_float_field() { |
| return generate_fast_get_float_field0(T_FLOAT); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_double_field() { |
| return generate_fast_get_float_field0(T_DOUBLE); |
| } |
