duke@435: /*
jrose@1145:  * Copyright 1997-2009 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: #include "incls/_precompiled.incl"
duke@435: #include "incls/_interpreter_x86_32.cpp.incl"
duke@435: 
duke@435: #define __ _masm->
duke@435: 
duke@435: // Initialize the sentinel used to distinguish an interpreter return address.
duke@435: const int Interpreter::return_sentinel = 0xfeedbeed;
duke@435: 
duke@435: //------------------------------------------------------------------------------------------------------------------------
duke@435: 
duke@435: address AbstractInterpreterGenerator::generate_slow_signature_handler() {
duke@435:   address entry = __ pc();
duke@435:   // rbx,: method
duke@435:   // rcx: temporary
duke@435:   // rdi: pointer to locals
duke@435:   // rsp: end of copied parameters area
never@739:   __ mov(rcx, rsp);
duke@435:   __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx);
duke@435:   __ ret(0);
duke@435:   return entry;
duke@435: }
duke@435: 
duke@435: 
duke@435: //
duke@435: // Various method entries (that c++ and asm interpreter agree upon)
duke@435: //------------------------------------------------------------------------------------------------------------------------
duke@435: //
duke@435: //
duke@435: 
duke@435: // Empty method, generate a very fast return.
duke@435: 
duke@435: address InterpreterGenerator::generate_empty_entry(void) {
duke@435: 
duke@435:   // rbx,: methodOop
duke@435:   // rcx: receiver (unused)
duke@435:   // rsi: previous interpreter state (C++ interpreter) must preserve
duke@435:   // rsi: sender sp must set sp to this value on return
duke@435: 
duke@435:   if (!UseFastEmptyMethods) return NULL;
duke@435: 
duke@435:   address entry_point = __ pc();
duke@435: 
duke@435:   // If we need a safepoint check, generate full interpreter entry.
duke@435:   Label slow_path;
duke@435:   ExternalAddress state(SafepointSynchronize::address_of_state());
duke@435:   __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
duke@435:            SafepointSynchronize::_not_synchronized);
duke@435:   __ jcc(Assembler::notEqual, slow_path);
duke@435: 
duke@435:   // do nothing for empty methods (do not even increment invocation counter)
duke@435:   // Code: _return
duke@435:   // _return
duke@435:   // return w/o popping parameters
never@739:   __ pop(rax);
never@739:   __ mov(rsp, rsi);
duke@435:   __ jmp(rax);
duke@435: 
duke@435:   __ bind(slow_path);
duke@435:   (void) generate_normal_entry(false);
duke@435:   return entry_point;
duke@435: }
duke@435: 
duke@435: address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) {
duke@435: 
duke@435:   // rbx,: methodOop
duke@435:   // rcx: scratrch
duke@435:   // rsi: sender sp
duke@435: 
duke@435:   if (!InlineIntrinsics) return NULL; // Generate a vanilla entry
duke@435: 
duke@435:   address entry_point = __ pc();
duke@435: 
duke@435:   // These don't need a safepoint check because they aren't virtually
duke@435:   // callable. We won't enter these intrinsics from compiled code.
duke@435:   // If in the future we added an intrinsic which was virtually callable
duke@435:   // we'd have to worry about how to safepoint so that this code is used.
duke@435: 
duke@435:   // mathematical functions inlined by compiler
duke@435:   // (interpreter must provide identical implementation
duke@435:   // in order to avoid monotonicity bugs when switching
duke@435:   // from interpreter to compiler in the middle of some
duke@435:   // computation)
duke@435:   //
duke@435:   // stack: [ ret adr ] <-- rsp
duke@435:   //        [ lo(arg) ]
duke@435:   //        [ hi(arg) ]
duke@435:   //
duke@435: 
duke@435:   // Note: For JDK 1.2 StrictMath doesn't exist and Math.sin/cos/sqrt are
duke@435:   //       native methods. Interpreter::method_kind(...) does a check for
duke@435:   //       native methods first before checking for intrinsic methods and
duke@435:   //       thus will never select this entry point. Make sure it is not
duke@435:   //       called accidentally since the SharedRuntime entry points will
duke@435:   //       not work for JDK 1.2.
duke@435:   //
duke@435:   // We no longer need to check for JDK 1.2 since it's EOL'ed.
duke@435:   // The following check existed in pre 1.6 implementation,
duke@435:   //    if (Universe::is_jdk12x_version()) {
duke@435:   //      __ should_not_reach_here();
duke@435:   //    }
duke@435:   // Universe::is_jdk12x_version() always returns false since
duke@435:   // the JDK version is not yet determined when this method is called.
duke@435:   // This method is called during interpreter_init() whereas
duke@435:   // JDK version is only determined when universe2_init() is called.
duke@435: 
duke@435:   // Note: For JDK 1.3 StrictMath exists and Math.sin/cos/sqrt are
duke@435:   //       java methods.  Interpreter::method_kind(...) will select
duke@435:   //       this entry point for the corresponding methods in JDK 1.3.
duke@435:   // get argument
duke@435:   if (TaggedStackInterpreter) {
duke@435:     __ pushl(Address(rsp, 3*wordSize));  // push hi (and note rsp -= wordSize)
duke@435:     __ pushl(Address(rsp, 2*wordSize));  // push lo
duke@435:     __ fld_d(Address(rsp, 0));           // get double in ST0
never@739:     __ addptr(rsp, 2*wordSize);
duke@435:   } else {
duke@435:     __ fld_d(Address(rsp, 1*wordSize));
duke@435:   }
duke@435:   switch (kind) {
duke@435:     case Interpreter::java_lang_math_sin :
duke@435:         __ trigfunc('s');
duke@435:         break;
duke@435:     case Interpreter::java_lang_math_cos :
duke@435:         __ trigfunc('c');
duke@435:         break;
duke@435:     case Interpreter::java_lang_math_tan :
duke@435:         __ trigfunc('t');
duke@435:         break;
duke@435:     case Interpreter::java_lang_math_sqrt:
duke@435:         __ fsqrt();
duke@435:         break;
duke@435:     case Interpreter::java_lang_math_abs:
duke@435:         __ fabs();
duke@435:         break;
duke@435:     case Interpreter::java_lang_math_log:
duke@435:         __ flog();
duke@435:         // Store to stack to convert 80bit precision back to 64bits
duke@435:         __ push_fTOS();
duke@435:         __ pop_fTOS();
duke@435:         break;
duke@435:     case Interpreter::java_lang_math_log10:
duke@435:         __ flog10();
duke@435:         // Store to stack to convert 80bit precision back to 64bits
duke@435:         __ push_fTOS();
duke@435:         __ pop_fTOS();
duke@435:         break;
duke@435:     default                              :
duke@435:         ShouldNotReachHere();
duke@435:   }
duke@435: 
duke@435:   // return double result in xmm0 for interpreter and compilers.
duke@435:   if (UseSSE >= 2) {
never@739:     __ subptr(rsp, 2*wordSize);
duke@435:     __ fstp_d(Address(rsp, 0));
duke@435:     __ movdbl(xmm0, Address(rsp, 0));
never@739:     __ addptr(rsp, 2*wordSize);
duke@435:   }
duke@435: 
duke@435:   // done, result in FPU ST(0) or XMM0
never@739:   __ pop(rdi);                               // get return address
never@739:   __ mov(rsp, rsi);                          // set sp to sender sp
duke@435:   __ jmp(rdi);
duke@435: 
duke@435:   return entry_point;
duke@435: }
duke@435: 
duke@435: 
duke@435: // Abstract method entry
duke@435: // Attempt to execute abstract method. Throw exception
duke@435: address InterpreterGenerator::generate_abstract_entry(void) {
duke@435: 
duke@435:   // rbx,: methodOop
duke@435:   // rcx: receiver (unused)
duke@435:   // rsi: previous interpreter state (C++ interpreter) must preserve
duke@435: 
duke@435:   // rsi: sender SP
duke@435: 
duke@435:   address entry_point = __ pc();
duke@435: 
duke@435:   // abstract method entry
duke@435: 
jrose@1145:   //  pop return address, reset last_sp to NULL
jrose@1145:   __ empty_expression_stack();
jrose@1145:   __ restore_bcp();      // rsi must be correct for exception handler   (was destroyed)
jrose@1145:   __ restore_locals();   // make sure locals pointer is correct as well (was destroyed)
jrose@1145: 
duke@435:   // throw exception
duke@435:   __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodError));
duke@435:   // the call_VM checks for exception, so we should never return here.
duke@435:   __ should_not_reach_here();
duke@435: 
duke@435:   return entry_point;
duke@435: }
duke@435: 
jrose@1145: 
jrose@1145: // Method handle invoker
jrose@1145: // Dispatch a method of the form java.dyn.MethodHandles::invoke(...)
jrose@1145: address InterpreterGenerator::generate_method_handle_entry(void) {
jrose@1145:   if (!EnableMethodHandles) {
jrose@1145:     return generate_abstract_entry();
jrose@1145:   }
jrose@1145: 
jrose@1145:   address entry_point = MethodHandles::generate_method_handle_interpreter_entry(_masm);
jrose@1145: 
jrose@1145:   return entry_point;
jrose@1145: }
jrose@1145: 
jrose@1145: 
duke@435: // This method tells the deoptimizer how big an interpreted frame must be:
duke@435: int AbstractInterpreter::size_activation(methodOop method,
duke@435:                                          int tempcount,
duke@435:                                          int popframe_extra_args,
duke@435:                                          int moncount,
duke@435:                                          int callee_param_count,
duke@435:                                          int callee_locals,
duke@435:                                          bool is_top_frame) {
duke@435:   return layout_activation(method,
duke@435:                            tempcount,
duke@435:                            popframe_extra_args,
duke@435:                            moncount,
duke@435:                            callee_param_count,
duke@435:                            callee_locals,
duke@435:                            (frame*) NULL,
duke@435:                            (frame*) NULL,
duke@435:                            is_top_frame);
duke@435: }
duke@435: 
duke@435: void Deoptimization::unwind_callee_save_values(frame* f, vframeArray* vframe_array) {
duke@435: 
duke@435:   // This code is sort of the equivalent of C2IAdapter::setup_stack_frame back in
duke@435:   // the days we had adapter frames. When we deoptimize a situation where a
duke@435:   // compiled caller calls a compiled caller will have registers it expects
duke@435:   // to survive the call to the callee. If we deoptimize the callee the only
duke@435:   // way we can restore these registers is to have the oldest interpreter
duke@435:   // frame that we create restore these values. That is what this routine
duke@435:   // will accomplish.
duke@435: 
duke@435:   // At the moment we have modified c2 to not have any callee save registers
duke@435:   // so this problem does not exist and this routine is just a place holder.
duke@435: 
duke@435:   assert(f->is_interpreted_frame(), "must be interpreted");
duke@435: }