jdk8-mips64-public/hotspot: src/cpu/x86/vm/jniFastGetField_x86

src/cpu/x86/vm/jniFastGetField_x86_32.cpp@f90c822e73f8 (annotated)

src/cpu/x86/vm/jniFastGetField_x86_32.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * 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;
   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;
   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;
   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;
   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);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/jniFastGetField_x86_32.cpp@f90c822e73f8 (annotated)

src/cpu/x86/vm/jniFastGetField_x86_32.cpp