--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/x86/vm/interpreter_x86_32.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,250 @@
+/*
+ * Copyright 1997-2007 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
+ __ movl(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
+ __ popl(rax);
+ __ movl(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
+ __ addl(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) {
+ __ subl(rsp, 2*wordSize);
+ __ fstp_d(Address(rsp, 0));
+ __ movdbl(xmm0, Address(rsp, 0));
+ __ addl(rsp, 2*wordSize);
+ }
+
+ // done, result in FPU ST(0) or XMM0
+ __ popl(rdi); // get return address
+ __ movl(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
+ __ popl(rbx);
+
+ // adjust stack to what a normal return would do
+ __ movl(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");
+}