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 /*

  * Copyright (c) 2003, 2009, 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 "incls/_precompiled.incl"

 #include "incls/_interpreter_x86_64.cpp.incl"

 #define __ _masm->

 #ifdef _WIN64

 address AbstractInterpreterGenerator::generate_slow_signature_handler() {

   address entry = __ pc();

   // rbx: method

   // r14: pointer to locals

   // c_rarg3: first stack arg - wordSize

   __ mov(c_rarg3, rsp);

   // adjust rsp

   __ subptr(rsp, 4 * wordSize);

   __ call_VM(noreg,

              CAST_FROM_FN_PTR(address,

                               InterpreterRuntime::slow_signature_handler),

              rbx, r14, c_rarg3);

   // rax: result handler

   // Stack layout:

   // rsp: 3 integer or float args (if static first is unused)

   //      1 float/double identifiers

   //        return address

   //        stack args

   //        garbage

   //        expression stack bottom

   //        bcp (NULL)

   //        ...

   // Do FP first so we can use c_rarg3 as temp

   __ movl(c_rarg3, Address(rsp, 3 * wordSize)); // float/double identifiers

   for ( int i= 0; i < Argument::n_int_register_parameters_c-1; i++ ) {

     XMMRegister floatreg = as_XMMRegister(i+1);

     Label isfloatordouble, isdouble, next;

     __ testl(c_rarg3, 1 << (i*2));      // Float or Double?

     __ jcc(Assembler::notZero, isfloatordouble);

     // Do Int register here

     switch ( i ) {

       case 0:

         __ movl(rscratch1, Address(rbx, methodOopDesc::access_flags_offset()));

         __ testl(rscratch1, JVM_ACC_STATIC);

         __ cmovptr(Assembler::zero, c_rarg1, Address(rsp, 0));

         break;

       case 1:

         __ movptr(c_rarg2, Address(rsp, wordSize));

         break;

       case 2:

         __ movptr(c_rarg3, Address(rsp, 2 * wordSize));

         break;

       default:

         break;

     }

     __ jmp (next);

     __ bind(isfloatordouble);

     __ testl(c_rarg3, 1 << ((i*2)+1));     // Double?

     __ jcc(Assembler::notZero, isdouble);

 // Do Float Here

     __ movflt(floatreg, Address(rsp, i * wordSize));

     __ jmp(next);

 // Do Double here

     __ bind(isdouble);

     __ movdbl(floatreg, Address(rsp, i * wordSize));

     __ bind(next);

   }

   // restore rsp

   __ addptr(rsp, 4 * wordSize);

   __ ret(0);

   return entry;

 }

 #else

 address AbstractInterpreterGenerator::generate_slow_signature_handler() {

   address entry = __ pc();

   // rbx: method

   // r14: pointer to locals

   // c_rarg3: first stack arg - wordSize

   __ mov(c_rarg3, rsp);

   // adjust rsp

   __ subptr(rsp, 14 * wordSize);

   __ call_VM(noreg,

              CAST_FROM_FN_PTR(address,

                               InterpreterRuntime::slow_signature_handler),

              rbx, r14, c_rarg3);

   // rax: result handler

   // Stack layout:

   // rsp: 5 integer args (if static first is unused)

   //      1 float/double identifiers

   //      8 double args

   //        return address

   //        stack args

   //        garbage

   //        expression stack bottom

   //        bcp (NULL)

   //        ...

   // Do FP first so we can use c_rarg3 as temp

   __ movl(c_rarg3, Address(rsp, 5 * wordSize)); // float/double identifiers

   for (int i = 0; i < Argument::n_float_register_parameters_c; i++) {

     const XMMRegister r = as_XMMRegister(i);

     Label d, done;

     __ testl(c_rarg3, 1 << i);

     __ jcc(Assembler::notZero, d);

     __ movflt(r, Address(rsp, (6 + i) * wordSize));

     __ jmp(done);

     __ bind(d);

     __ movdbl(r, Address(rsp, (6 + i) * wordSize));

     __ bind(done);

   }

   // Now handle integrals.  Only do c_rarg1 if not static.

   __ movl(c_rarg3, Address(rbx, methodOopDesc::access_flags_offset()));

   __ testl(c_rarg3, JVM_ACC_STATIC);

   __ cmovptr(Assembler::zero, c_rarg1, Address(rsp, 0));

   __ movptr(c_rarg2, Address(rsp, wordSize));

   __ movptr(c_rarg3, Address(rsp, 2 * wordSize));

   __ movptr(c_rarg4, Address(rsp, 3 * wordSize));

   __ movptr(c_rarg5, Address(rsp, 4 * wordSize));

   // restore rsp

   __ addptr(rsp, 14 * wordSize);

   __ ret(0);

   return entry;

 }

 #endif

 //

 // Various method entries

 //

 address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {

   // rbx,: methodOop

   // rcx: scratrch

   // r13: sender sp

   if (!InlineIntrinsics) return NULL; // Generate a vanilla entry

   address entry_point = __ pc();

   // These don't need a safepoint check because they aren't virtually

   // callable. We won't enter these intrinsics from compiled code.

   // If in the future we added an intrinsic which was virtually callable

   // we'd have to worry about how to safepoint so that this code is used.

   // mathematical functions inlined by compiler

   // (interpreter must provide identical implementation

   // in order to avoid monotonicity bugs when switching

   // from interpreter to compiler in the middle of some

   // computation)

   //

   // stack: [ ret adr ] <-- rsp

   //        [ lo(arg) ]

   //        [ hi(arg) ]

   //

   // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are

   //       native methods. Interpreter::method_kind(...) does a check for

   //       native methods first before checking for intrinsic methods and

   //       thus will never select this entry point. Make sure it is not

   //       called accidentally since the SharedRuntime entry points will

   //       not work for JDK 1.2.

   //

   // We no longer need to check for JDK 1.2 since it's EOL'ed.

   // The following check existed in pre 1.6 implementation,

   //    if (Universe::is_jdk12x_version()) {

   //      __ should_not_reach_here();

   //    }

   // Universe::is_jdk12x_version() always returns false since

   // the JDK version is not yet determined when this method is called.

   // This method is called during interpreter_init() whereas

   // JDK version is only determined when universe2_init() is called.

   // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are

   //       java methods.  Interpreter::method_kind(...) will select

   //       this entry point for the corresponding methods in JDK 1.3.

   // get argument

   if (kind == Interpreter::java_lang_math_sqrt) {

     __ sqrtsd(xmm0, Address(rsp, wordSize));

   } else {

     __ fld_d(Address(rsp, wordSize));

     switch (kind) {

       case Interpreter::java_lang_math_sin :

           __ trigfunc('s');

           break;

       case Interpreter::java_lang_math_cos :

           __ trigfunc('c');

           break;

       case Interpreter::java_lang_math_tan :

           __ trigfunc('t');

           break;

       case Interpreter::java_lang_math_abs:

           __ fabs();

           break;

       case Interpreter::java_lang_math_log:

           __ flog();

           break;

       case Interpreter::java_lang_math_log10:

           __ flog10();

           break;

       default                              :

           ShouldNotReachHere();

     }

     // return double result in xmm0 for interpreter and compilers.

     __ subptr(rsp, 2*wordSize);

     // Round to 64bit precision

     __ fstp_d(Address(rsp, 0));

     __ movdbl(xmm0, Address(rsp, 0));

     __ addptr(rsp, 2*wordSize);

   }

   __ pop(rax);

   __ mov(rsp, r13);

   __ jmp(rax);

   return entry_point;

 }

 // Abstract method entry

 // Attempt to execute abstract method. Throw exception

 address InterpreterGenerator::generate_abstract_entry(void) {

   // rbx: methodOop

   // r13: sender SP

   address entry_point = __ pc();

   // abstract method entry

   //  pop return address, reset last_sp to NULL

   __ empty_expression_stack();

   __ restore_bcp();      // rsi must be correct for exception handler   (was destroyed)

   __ restore_locals();   // make sure locals pointer is correct as well (was destroyed)

   // throw exception

   __ call_VM(noreg, CAST_FROM_FN_PTR(address,

                              InterpreterRuntime::throw_AbstractMethodError));

   // the call_VM checks for exception, so we should never return here.

   __ should_not_reach_here();

   return entry_point;

 }

 // Method handle invoker

 // Dispatch a method of the form java.dyn.MethodHandles::invoke(...)

 address InterpreterGenerator::generate_method_handle_entry(void) {

   if (!EnableMethodHandles) {

     return generate_abstract_entry();

   }

   address entry_point = MethodHandles::generate_method_handle_interpreter_entry(_masm);

   return entry_point;

 }

 // Empty method, generate a very fast return.

 address InterpreterGenerator::generate_empty_entry(void) {

   // rbx: methodOop

   // r13: sender sp must set sp to this value on return

   if (!UseFastEmptyMethods) {

     return NULL;

   }

   address entry_point = __ pc();

   // If we need a safepoint check, generate full interpreter entry.

   Label slow_path;

   __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),

            SafepointSynchronize::_not_synchronized);

   __ jcc(Assembler::notEqual, slow_path);

   // do nothing for empty methods (do not even increment invocation counter)

   // Code: _return

   // _return

   // return w/o popping parameters

   __ pop(rax);

   __ mov(rsp, r13);

   __ jmp(rax);

   __ bind(slow_path);

   (void) generate_normal_entry(false);

   return entry_point;

 }

 // This method tells the deoptimizer how big an interpreted frame must be:

 int AbstractInterpreter::size_activation(methodOop method,

                                          int tempcount,

                                          int popframe_extra_args,

                                          int moncount,

                                          int callee_param_count,

                                          int callee_locals,

                                          bool is_top_frame) {

   return layout_activation(method,

                            tempcount, popframe_extra_args, moncount,

                            callee_param_count, callee_locals,

                            (frame*) NULL, (frame*) NULL, is_top_frame);

 }

 void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {

   // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in

   // the days we had adapter frames. When we deoptimize a situation where a

   // compiled caller calls a compiled caller will have registers it expects

   // to survive the call to the callee. If we deoptimize the callee the only

   // way we can restore these registers is to have the oldest interpreter

   // frame that we create restore these values. That is what this routine

   // will accomplish.

   // At the moment we have modified c2 to not have any callee save registers

   // so this problem does not exist and this routine is just a place holder.

   assert(f->is_interpreted_frame(), "must be interpreted");

 }