--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/x86/vm/interpreterRT_x86_32.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,133 @@
+/*
+ * Copyright 1998-2005 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/_interpreterRT_x86_32.cpp.incl"
+
+
+#define __ _masm->
+
+
+// Implementation of SignatureHandlerGenerator
+void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
+  move(offset(), jni_offset() + 1);
+}
+
+void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
+   move(offset(), jni_offset() + 2);
+   move(offset() + 1, jni_offset() + 1);
+}
+
+void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
+  box (offset(), jni_offset() + 1);
+}
+
+void InterpreterRuntime::SignatureHandlerGenerator::move(int from_offset, int to_offset) {
+  __ movl(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
+  __ movl(Address(to(), to_offset * wordSize), temp());
+}
+
+
+void InterpreterRuntime::SignatureHandlerGenerator::box(int from_offset, int to_offset) {
+  __ leal(temp(), Address(from(), Interpreter::local_offset_in_bytes(from_offset)));
+  __ cmpl(Address(from(), Interpreter::local_offset_in_bytes(from_offset)), 0); // do not use temp() to avoid AGI
+  Label L;
+  __ jcc(Assembler::notZero, L);
+  __ movl(temp(), 0);
+  __ bind(L);
+  __ movl(Address(to(), to_offset * wordSize), temp());
+}
+
+
+void InterpreterRuntime::SignatureHandlerGenerator::generate( uint64_t fingerprint) {
+  // generate code to handle arguments
+  iterate(fingerprint);
+  // return result handler
+  __ lea(rax,
+         ExternalAddress((address)Interpreter::result_handler(method()->result_type())));
+  // return
+  __ ret(0);
+  __ flush();
+}
+
+
+Register InterpreterRuntime::SignatureHandlerGenerator::from()       { return rdi; }
+Register InterpreterRuntime::SignatureHandlerGenerator::to()         { return rsp; }
+Register InterpreterRuntime::SignatureHandlerGenerator::temp()       { return rcx; }
+
+
+// Implementation of SignatureHandlerLibrary
+
+void SignatureHandlerLibrary::pd_set_handler(address handler) {}
+
+class SlowSignatureHandler: public NativeSignatureIterator {
+ private:
+  address   _from;
+  intptr_t* _to;
+
+#ifdef ASSERT
+  void verify_tag(frame::Tag t) {
+    assert(!TaggedStackInterpreter ||
+           *(intptr_t*)(_from+Interpreter::local_tag_offset_in_bytes(0)) == t, "wrong tag");
+  }
+#endif // ASSERT
+
+  virtual void pass_int() {
+    *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    debug_only(verify_tag(frame::TagValue));
+    _from -= Interpreter::stackElementSize();
+  }
+
+  virtual void pass_long() {
+    _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+    _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
+    debug_only(verify_tag(frame::TagValue));
+    _to += 2;
+    _from -= 2*Interpreter::stackElementSize();
+  }
+
+  virtual void pass_object() {
+    // pass address of from
+    intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
+    *_to++ = (*(intptr_t*)from_addr == 0) ? NULL : from_addr;
+    debug_only(verify_tag(frame::TagReference));
+    _from -= Interpreter::stackElementSize();
+   }
+
+ public:
+  SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :
+    NativeSignatureIterator(method) {
+    _from = from;
+    _to   = to + (is_static() ? 2 : 1);
+  }
+};
+
+IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, methodOopDesc* method, intptr_t* from, intptr_t* to))
+  methodHandle m(thread, (methodOop)method);
+  assert(m->is_native(), "sanity check");
+  // handle arguments
+  SlowSignatureHandler(m, (address)from, to + 1).iterate(UCONST64(-1));
+  // return result handler
+  return Interpreter::result_handler(m->result_type());
+IRT_END