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 /*

  * Copyright (c) 2004, 2017, 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.inline.hpp"

 #include "memory/resourceArea.hpp"

 #include "prims/jniFastGetField.hpp"

 #include "prims/jvm_misc.hpp"

 #include "runtime/safepoint.hpp"

 // TSO ensures that loads are blocking and ordered with respect to

 // to earlier loads, so we don't need LoadLoad membars.

 #define __ masm->

 #define BUFFER_SIZE 30*sizeof(jint)

 // Common register usage:

 // O0: env

 // O1: obj

 // O2: jfieldID

 // O4: offset (O2 >> 2)

 // G4: old safepoint counter

 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 label1, label2;

   AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());

   __ sethi (cnt_addrlit, O3);

   Address cnt_addr(O3, cnt_addrlit.low10());

   __ ld (cnt_addr, G4);

   __ andcc (G4, 1, G0);

   __ br (Assembler::notZero, false, Assembler::pn, label1);

   __ delayed()->srl (O2, 2, O4);

   __ andn (O1, JNIHandles::weak_tag_mask, O1);

   __ ld_ptr (O1, 0, O5);

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

   speculative_load_pclist[count] = __ pc();

   switch (type) {

     case T_BOOLEAN: __ ldub (O5, O4, G3);  break;

     case T_BYTE:    __ ldsb (O5, O4, G3);  break;

     case T_CHAR:    __ lduh (O5, O4, G3);  break;

     case T_SHORT:   __ ldsh (O5, O4, G3);  break;

     case T_INT:     __ ld (O5, O4, G3);    break;

     default:        ShouldNotReachHere();

   }

   __ ld (cnt_addr, O5);

   __ cmp (O5, G4);

   __ br (Assembler::notEqual, false, Assembler::pn, label2);

   __ delayed()->mov (O7, G1);

   __ retl ();

   __ delayed()->mov (G3, O0);

   slowcase_entry_pclist[count++] = __ pc();

   __ bind (label1);

   __ mov (O7, G1);

   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();     break;

     default:        ShouldNotReachHere();

   }

   __ bind (label2);

   __ call (slow_case_addr, relocInfo::none);

   __ delayed()->mov (G1, O7);

   __ 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() {

   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 label1, label2;

   AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());

   __ sethi (cnt_addrlit, G3);

   Address cnt_addr(G3, cnt_addrlit.low10());

   __ ld (cnt_addr, G4);

   __ andcc (G4, 1, G0);

   __ br (Assembler::notZero, false, Assembler::pn, label1);

   __ delayed()->srl (O2, 2, O4);

   __ andn (O1, JNIHandles::weak_tag_mask, O1);

   __ ld_ptr (O1, 0, O5);

   __ add (O5, O4, O5);

 #ifndef _LP64

   assert(count < LIST_CAPACITY-1, "LIST_CAPACITY too small");

   speculative_load_pclist[count++] = __ pc();

   __ ld (O5, 0, G2);

   speculative_load_pclist[count] = __ pc();

   __ ld (O5, 4, O3);

 #else

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

   speculative_load_pclist[count] = __ pc();

   __ ldx (O5, 0, O3);

 #endif

   __ ld (cnt_addr, G1);

   __ cmp (G1, G4);

   __ br (Assembler::notEqual, false, Assembler::pn, label2);

   __ delayed()->mov (O7, G1);

 #ifndef _LP64

   __ mov (G2, O0);

   __ retl ();

   __ delayed()->mov (O3, O1);

 #else

   __ retl ();

   __ delayed()->mov (O3, O0);

 #endif

 #ifndef _LP64

   slowcase_entry_pclist[count-1] = __ pc();

   slowcase_entry_pclist[count++] = __ pc() ;

 #else

   slowcase_entry_pclist[count++] = __ pc();

 #endif

   __ bind (label1);

   __ mov (O7, G1);

   address slow_case_addr = jni_GetLongField_addr();

   __ bind (label2);

   __ call (slow_case_addr, relocInfo::none);

   __ delayed()->mov (G1, O7);

   __ flush ();

   return fast_entry;

 }

 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 label1, label2;

   AddressLiteral cnt_addrlit(SafepointSynchronize::safepoint_counter_addr());

   __ sethi (cnt_addrlit, O3);

   Address cnt_addr(O3, cnt_addrlit.low10());

   __ ld (cnt_addr, G4);

   __ andcc (G4, 1, G0);

   __ br (Assembler::notZero, false, Assembler::pn, label1);

   __ delayed()->srl (O2, 2, O4);

   __ andn (O1, JNIHandles::weak_tag_mask, O1);

   __ ld_ptr (O1, 0, O5);

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

   speculative_load_pclist[count] = __ pc();

   switch (type) {

     case T_FLOAT:  __ ldf (FloatRegisterImpl::S, O5, O4, F0); break;

     case T_DOUBLE: __ ldf (FloatRegisterImpl::D, O5, O4, F0); break;

     default:       ShouldNotReachHere();

   }

   __ ld (cnt_addr, O5);

   __ cmp (O5, G4);

   __ br (Assembler::notEqual, false, Assembler::pn, label2);

   __ delayed()->mov (O7, G1);

   __ retl ();

   __ delayed()-> nop ();

   slowcase_entry_pclist[count++] = __ pc();

   __ bind (label1);

   __ mov (O7, G1);

   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();

   }

   __ bind (label2);

   __ call (slow_case_addr, relocInfo::none);

   __ delayed()->mov (G1, O7);

   __ 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);

 }