Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.

  * Copyright (c) 2015, 2019, Loongson Technology. 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*wordSize

 // Instead of issuing lfence for LoadLoad barrier, we create data dependency

 // between loads, which is 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;

     case T_LONG:    name = "jni_fast_GetLongField";    break;

     default:        ShouldNotReachHere();

   }

   ResourceMark rm;

   BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE);

   CodeBuffer cbuf(blob);

   MacroAssembler* masm = new MacroAssembler(&cbuf);

   address fast_entry = __ pc();

   Label slow;

   //  return pc        RA

   //  jni env          A0

   //  obj              A1

   //  jfieldID         A2

   address counter_addr = SafepointSynchronize::safepoint_counter_addr();

   __ set64(AT, (long)counter_addr);

   __ lw(T1, AT, 0);

   // Parameters(A0~A3) should not be modified, since they will be used in slow path

   __ andi(AT, T1, 1);

   __ bne(AT, R0, slow);

   __ delayed()->nop();

   __ move(T0, A1);

   __ clear_jweak_tag(T0);

   __ ld(T0, T0, 0);              // unbox, *obj

   __ move(T2, A2);

   __ shr(T2, 2);                 // offset

   __ dadd(T0, T0, T2);

   assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");

   speculative_load_pclist[count] = __ pc();

   switch (type) {

     case T_BOOLEAN: __ lbu (V0, T0, 0); break;

     case T_BYTE:    __ lb  (V0, T0, 0); break;

     case T_CHAR:    __ lhu (V0, T0, 0); break;

     case T_SHORT:   __ lh  (V0, T0, 0); break;

     case T_INT:     __ lw  (V0, T0, 0); break;

     case T_LONG:    __ ld  (V0, T0, 0); break;

     default:        ShouldNotReachHere();

   }

   __ set64(AT, (long)counter_addr);

   __ lw(AT, AT, 0);

   __ bne(T1, AT, slow);

   __ delayed()->nop();

   __ jr(RA);

   __ delayed()->nop();

   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();     break;

     case T_LONG:    slow_case_addr = jni_GetLongField_addr();

   }

   __ jmp(slow_case_addr);

   __ delayed()->nop();

   __ flush ();

   return fast_entry;

 }

 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() {

   return generate_fast_get_int_field0(T_LONG);

 }

 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);

   CodeBuffer cbuf(blob);

   MacroAssembler* masm = new MacroAssembler(&cbuf);

   address fast_entry = __ pc();

   Label slow;

   //  return pc        RA

   //  jni env          A0

   //  obj              A1

   //  jfieldID         A2

   address counter_addr = SafepointSynchronize::safepoint_counter_addr();

 #ifdef _LP64

   __ set64(AT, (intptr_t)counter_addr);

   __ lw(T1, AT, 0);

 #else

   __ lui(AT, Assembler::split_high((intptr_t)counter_addr));

   __ lw(T1, AT, Assembler::split_low((intptr_t)counter_addr));

 #endif

   __ andi(AT, T1, 1);

   __ bne(AT, R0, slow);

   __ delayed()->nop();

   __ clear_jweak_tag(A1);

 #ifdef _LP64

   __ ld(A1, A1, 0);              // unbox, *obj

 #else

   __ lw(A1, A1, 0);              // unbox, *obj

 #endif

   __ shr(A2, 2);                  // offset

   __ add(A1, A1, A2);

   assert(count < LIST_CAPACITY, "LIST_CAPACITY too small");

   speculative_load_pclist[count] = __ pc();

   switch (type) {

     case T_FLOAT:

       __ lwc1(F0, A1, 0);

       break;

     case T_DOUBLE:

 #ifdef _LP64

       __ ldc1(F0, A1, 0);

 #else

       __ lwc1(F0, A1, 0);

       __ lwc1(F1, A1, 4);

 #endif

       break;

     default:       ShouldNotReachHere();

   }

 #ifdef _LP64

   __ set64(AT, (intptr_t)counter_addr);

   __ lw(AT, AT, 0);

 #else

   __ lui(AT, Assembler::split_high((intptr_t)counter_addr));

   __ lw(AT, AT, Assembler::split_low((intptr_t)counter_addr));

 #endif

   __ bne(T1, AT, slow);

   __ delayed()->nop();

   __ jr(RA);

   __ delayed()->nop();

   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();

   }

   __ jmp(slow_case_addr);

   __ delayed()->nop();

   __ flush ();

   return fast_entry;

 }

 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);

 }