/* * Copyright 1997-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ #include "incls/_precompiled.incl" #include "incls/_interpreter_x86_32.cpp.incl" #define __ _masm-> // Initialize the sentinel used to distinguish an interpreter return address. const int Interpreter::return_sentinel = 0xfeedbeed; //------------------------------------------------------------------------------------------------------------------------ address AbstractInterpreterGenerator::generate_slow_signature_handler() { address entry = __ pc(); // rbx,: method // rcx: temporary // rdi: pointer to locals // rsp: end of copied parameters area __ mov(rcx, rsp); __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), rbx, rdi, rcx); __ ret(0); return entry; } // // Various method entries (that c++ and asm interpreter agree upon) //------------------------------------------------------------------------------------------------------------------------ // // // Empty method, generate a very fast return. address InterpreterGenerator::generate_empty_entry(void) { // rbx,: methodOop // rcx: receiver (unused) // rsi: previous interpreter state (C++ interpreter) must preserve // rsi: 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; ExternalAddress state(SafepointSynchronize::address_of_state()); __ 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, rsi); __ jmp(rax); __ bind(slow_path); (void) generate_normal_entry(false); return entry_point; } address InterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { // rbx,: methodOop // rcx: scratrch // rsi: 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 (TaggedStackInterpreter) { __ pushl(Address(rsp, 3*wordSize)); // push hi (and note rsp -= wordSize) __ pushl(Address(rsp, 2*wordSize)); // push lo __ fld_d(Address(rsp, 0)); // get double in ST0 __ addptr(rsp, 2*wordSize); } else { __ fld_d(Address(rsp, 1*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_sqrt: __ fsqrt(); break; case Interpreter::java_lang_math_abs: __ fabs(); break; case Interpreter::java_lang_math_log: __ flog(); // Store to stack to convert 80bit precision back to 64bits __ push_fTOS(); __ pop_fTOS(); break; case Interpreter::java_lang_math_log10: __ flog10(); // Store to stack to convert 80bit precision back to 64bits __ push_fTOS(); __ pop_fTOS(); break; default : ShouldNotReachHere(); } // return double result in xmm0 for interpreter and compilers. if (UseSSE >= 2) { __ subptr(rsp, 2*wordSize); __ fstp_d(Address(rsp, 0)); __ movdbl(xmm0, Address(rsp, 0)); __ addptr(rsp, 2*wordSize); } // done, result in FPU ST(0) or XMM0 __ pop(rdi); // get return address __ mov(rsp, rsi); // set sp to sender sp __ jmp(rdi); return entry_point; } // Abstract method entry // Attempt to execute abstract method. Throw exception address InterpreterGenerator::generate_abstract_entry(void) { // rbx,: methodOop // rcx: receiver (unused) // rsi: previous interpreter state (C++ interpreter) must preserve // rsi: sender SP address entry_point = __ pc(); // abstract method entry // remove return address. Not really needed, since exception handling throws away expression stack __ pop(rbx); // adjust stack to what a normal return would do __ mov(rsp, rsi); // 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; } // 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"); }