--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cpu/sparc/vm/interpreter_sparc.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,420 @@
+/*
+ * 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_sparc.cpp.incl"
+
+
+
+// Generation of Interpreter
+//
+// The InterpreterGenerator generates the interpreter into Interpreter::_code.
+
+
+#define __ _masm->
+
+
+//----------------------------------------------------------------------------------------------------
+
+
+
+
+int AbstractInterpreter::BasicType_as_index(BasicType type) {
+  int i = 0;
+  switch (type) {
+    case T_BOOLEAN: i = 0; break;
+    case T_CHAR   : i = 1; break;
+    case T_BYTE   : i = 2; break;
+    case T_SHORT  : i = 3; break;
+    case T_INT    : i = 4; break;
+    case T_LONG   : i = 5; break;
+    case T_VOID   : i = 6; break;
+    case T_FLOAT  : i = 7; break;
+    case T_DOUBLE : i = 8; break;
+    case T_OBJECT : i = 9; break;
+    case T_ARRAY  : i = 9; break;
+    default       : ShouldNotReachHere();
+  }
+  assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
+  return i;
+}
+
+
+#ifndef _LP64
+address AbstractInterpreterGenerator::generate_slow_signature_handler() {
+  address entry = __ pc();
+  Argument argv(0, true);
+
+  // We are in the jni transition frame. Save the last_java_frame corresponding to the
+  // outer interpreter frame
+  //
+  __ set_last_Java_frame(FP, noreg);
+  // make sure the interpreter frame we've pushed has a valid return pc
+  __ mov(O7, I7);
+  __ mov(Lmethod, G3_scratch);
+  __ mov(Llocals, G4_scratch);
+  __ save_frame(0);
+  __ mov(G2_thread, L7_thread_cache);
+  __ add(argv.address_in_frame(), O3);
+  __ mov(G2_thread, O0);
+  __ mov(G3_scratch, O1);
+  __ call(CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), relocInfo::runtime_call_type);
+  __ delayed()->mov(G4_scratch, O2);
+  __ mov(L7_thread_cache, G2_thread);
+  __ reset_last_Java_frame();
+
+  // load the register arguments (the C code packed them as varargs)
+  for (Argument ldarg = argv.successor(); ldarg.is_register(); ldarg = ldarg.successor()) {
+      __ ld_ptr(ldarg.address_in_frame(), ldarg.as_register());
+  }
+  __ ret();
+  __ delayed()->
+     restore(O0, 0, Lscratch);  // caller's Lscratch gets the result handler
+  return entry;
+}
+
+
+#else
+// LP64 passes floating point arguments in F1, F3, F5, etc. instead of
+// O0, O1, O2 etc..
+// Doubles are passed in D0, D2, D4
+// We store the signature of the first 16 arguments in the first argument
+// slot because it will be overwritten prior to calling the native
+// function, with the pointer to the JNIEnv.
+// If LP64 there can be up to 16 floating point arguments in registers
+// or 6 integer registers.
+address AbstractInterpreterGenerator::generate_slow_signature_handler() {
+
+  enum {
+    non_float  = 0,
+    float_sig  = 1,
+    double_sig = 2,
+    sig_mask   = 3
+  };
+
+  address entry = __ pc();
+  Argument argv(0, true);
+
+  // We are in the jni transition frame. Save the last_java_frame corresponding to the
+  // outer interpreter frame
+  //
+  __ set_last_Java_frame(FP, noreg);
+  // make sure the interpreter frame we've pushed has a valid return pc
+  __ mov(O7, I7);
+  __ mov(Lmethod, G3_scratch);
+  __ mov(Llocals, G4_scratch);
+  __ save_frame(0);
+  __ mov(G2_thread, L7_thread_cache);
+  __ add(argv.address_in_frame(), O3);
+  __ mov(G2_thread, O0);
+  __ mov(G3_scratch, O1);
+  __ call(CAST_FROM_FN_PTR(address, InterpreterRuntime::slow_signature_handler), relocInfo::runtime_call_type);
+  __ delayed()->mov(G4_scratch, O2);
+  __ mov(L7_thread_cache, G2_thread);
+  __ reset_last_Java_frame();
+
+
+  // load the register arguments (the C code packed them as varargs)
+  Address Sig = argv.address_in_frame();        // Argument 0 holds the signature
+  __ ld_ptr( Sig, G3_scratch );                   // Get register argument signature word into G3_scratch
+  __ mov( G3_scratch, G4_scratch);
+  __ srl( G4_scratch, 2, G4_scratch);             // Skip Arg 0
+  Label done;
+  for (Argument ldarg = argv.successor(); ldarg.is_float_register(); ldarg = ldarg.successor()) {
+    Label NonFloatArg;
+    Label LoadFloatArg;
+    Label LoadDoubleArg;
+    Label NextArg;
+    Address a = ldarg.address_in_frame();
+    __ andcc(G4_scratch, sig_mask, G3_scratch);
+    __ br(Assembler::zero, false, Assembler::pt, NonFloatArg);
+    __ delayed()->nop();
+
+    __ cmp(G3_scratch, float_sig );
+    __ br(Assembler::equal, false, Assembler::pt, LoadFloatArg);
+    __ delayed()->nop();
+
+    __ cmp(G3_scratch, double_sig );
+    __ br(Assembler::equal, false, Assembler::pt, LoadDoubleArg);
+    __ delayed()->nop();
+
+    __ bind(NonFloatArg);
+    // There are only 6 integer register arguments!
+    if ( ldarg.is_register() )
+      __ ld_ptr(ldarg.address_in_frame(), ldarg.as_register());
+    else {
+    // Optimization, see if there are any more args and get out prior to checking
+    // all 16 float registers.  My guess is that this is rare.
+    // If is_register is false, then we are done the first six integer args.
+      __ tst(G4_scratch);
+      __ brx(Assembler::zero, false, Assembler::pt, done);
+      __ delayed()->nop();
+
+    }
+    __ ba(false, NextArg);
+    __ delayed()->srl( G4_scratch, 2, G4_scratch );
+
+    __ bind(LoadFloatArg);
+    __ ldf( FloatRegisterImpl::S, a, ldarg.as_float_register(), 4);
+    __ ba(false, NextArg);
+    __ delayed()->srl( G4_scratch, 2, G4_scratch );
+
+    __ bind(LoadDoubleArg);
+    __ ldf( FloatRegisterImpl::D, a, ldarg.as_double_register() );
+    __ ba(false, NextArg);
+    __ delayed()->srl( G4_scratch, 2, G4_scratch );
+
+    __ bind(NextArg);
+
+  }
+
+  __ bind(done);
+  __ ret();
+  __ delayed()->
+     restore(O0, 0, Lscratch);  // caller's Lscratch gets the result handler
+  return entry;
+}
+#endif
+
+void InterpreterGenerator::generate_counter_overflow(Label& Lcontinue) {
+
+  // Generate code to initiate compilation on the counter overflow.
+
+  // InterpreterRuntime::frequency_counter_overflow takes two arguments,
+  // the first indicates if the counter overflow occurs at a backwards branch (NULL bcp)
+  // and the second is only used when the first is true.  We pass zero for both.
+  // The call returns the address of the verified entry point for the method or NULL
+  // if the compilation did not complete (either went background or bailed out).
+  __ set((int)false, O2);
+  __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), O2, O2, true);
+  // returns verified_entry_point or NULL
+  // we ignore it in any case
+  __ ba(false, Lcontinue);
+  __ delayed()->nop();
+
+}
+
+
+// End of helpers
+
+// Various method entries
+
+// Abstract method entry
+// Attempt to execute abstract method. Throw exception
+//
+address InterpreterGenerator::generate_abstract_entry(void) {
+  address entry = __ pc();
+  // abstract method entry
+  // 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;
+
+}
+
+
+//----------------------------------------------------------------------------------------------------
+// Entry points & stack frame layout
+//
+// Here we generate the various kind of entries into the interpreter.
+// The two main entry type are generic bytecode methods and native call method.
+// These both come in synchronized and non-synchronized versions but the
+// frame layout they create is very similar. The other method entry
+// types are really just special purpose entries that are really entry
+// and interpretation all in one. These are for trivial methods like
+// accessor, empty, or special math methods.
+//
+// When control flow reaches any of the entry types for the interpreter
+// the following holds ->
+//
+// C2 Calling Conventions:
+//
+// The entry code below assumes that the following registers are set
+// when coming in:
+//    G5_method: holds the methodOop of the method to call
+//    Lesp:    points to the TOS of the callers expression stack
+//             after having pushed all the parameters
+//
+// The entry code does the following to setup an interpreter frame
+//   pop parameters from the callers stack by adjusting Lesp
+//   set O0 to Lesp
+//   compute X = (max_locals - num_parameters)
+//   bump SP up by X to accomadate the extra locals
+//   compute X = max_expression_stack
+//               + vm_local_words
+//               + 16 words of register save area
+//   save frame doing a save sp, -X, sp growing towards lower addresses
+//   set Lbcp, Lmethod, LcpoolCache
+//   set Llocals to i0
+//   set Lmonitors to FP - rounded_vm_local_words
+//   set Lesp to Lmonitors - 4
+//
+//  The frame has now been setup to do the rest of the entry code
+
+// Try this optimization:  Most method entries could live in a
+// "one size fits all" stack frame without all the dynamic size
+// calculations.  It might be profitable to do all this calculation
+// statically and approximately for "small enough" methods.
+
+//-----------------------------------------------------------------------------------------------
+
+// C1 Calling conventions
+//
+// Upon method entry, the following registers are setup:
+//
+// g2 G2_thread: current thread
+// g5 G5_method: method to activate
+// g4 Gargs  : pointer to last argument
+//
+//
+// Stack:
+//
+// +---------------+ <--- sp
+// |               |
+// : reg save area :
+// |               |
+// +---------------+ <--- sp + 0x40
+// |               |
+// : extra 7 slots :      note: these slots are not really needed for the interpreter (fix later)
+// |               |
+// +---------------+ <--- sp + 0x5c
+// |               |
+// :     free      :
+// |               |
+// +---------------+ <--- Gargs
+// |               |
+// :   arguments   :
+// |               |
+// +---------------+
+// |               |
+//
+//
+//
+// AFTER FRAME HAS BEEN SETUP for method interpretation the stack looks like:
+//
+// +---------------+ <--- sp
+// |               |
+// : reg save area :
+// |               |
+// +---------------+ <--- sp + 0x40
+// |               |
+// : extra 7 slots :      note: these slots are not really needed for the interpreter (fix later)
+// |               |
+// +---------------+ <--- sp + 0x5c
+// |               |
+// :               :
+// |               | <--- Lesp
+// +---------------+ <--- Lmonitors (fp - 0x18)
+// |   VM locals   |
+// +---------------+ <--- fp
+// |               |
+// : reg save area :
+// |               |
+// +---------------+ <--- fp + 0x40
+// |               |
+// : extra 7 slots :      note: these slots are not really needed for the interpreter (fix later)
+// |               |
+// +---------------+ <--- fp + 0x5c
+// |               |
+// :     free      :
+// |               |
+// +---------------+
+// |               |
+// : nonarg locals :
+// |               |
+// +---------------+
+// |               |
+// :   arguments   :
+// |               | <--- Llocals
+// +---------------+ <--- Gargs
+// |               |
+
+address AbstractInterpreterGenerator::generate_method_entry(AbstractInterpreter::MethodKind kind) {
+  // determine code generation flags
+  bool synchronized = false;
+  address entry_point = NULL;
+
+  switch (kind) {
+    case Interpreter::zerolocals             :                                                                             break;
+    case Interpreter::zerolocals_synchronized: synchronized = true;                                                        break;
+    case Interpreter::native                 : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(false);  break;
+    case Interpreter::native_synchronized    : entry_point = ((InterpreterGenerator*)this)->generate_native_entry(true);   break;
+    case Interpreter::empty                  : entry_point = ((InterpreterGenerator*)this)->generate_empty_entry();        break;
+    case Interpreter::accessor               : entry_point = ((InterpreterGenerator*)this)->generate_accessor_entry();     break;
+    case Interpreter::abstract               : entry_point = ((InterpreterGenerator*)this)->generate_abstract_entry();     break;
+    case Interpreter::java_lang_math_sin     :                                                                             break;
+    case Interpreter::java_lang_math_cos     :                                                                             break;
+    case Interpreter::java_lang_math_tan     :                                                                             break;
+    case Interpreter::java_lang_math_sqrt    :                                                                             break;
+    case Interpreter::java_lang_math_abs     :                                                                             break;
+    case Interpreter::java_lang_math_log     :                                                                             break;
+    case Interpreter::java_lang_math_log10   :                                                                             break;
+    default                                  : ShouldNotReachHere();                                                       break;
+  }
+
+  if (entry_point) return entry_point;
+
+  return ((InterpreterGenerator*)this)->generate_normal_entry(synchronized);
+}
+
+
+// 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");
+}
+
+
+//----------------------------------------------------------------------------------------------------
+// Exceptions