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comparison src/cpu/zero/vm/cppInterpreter_zero.cpp @ 1256:c09ee209b65c

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6926048: Improve Zero performance Summary: Make Zero figure out result types in a similar way to C++ interpreter implementation. Reviewed-by: kvn Contributed-by: gbenson@redhat.com
author kvn
date Fri, 12 Feb 2010 10:34:11 -0800
parents b6f06e395428
children 747d26efc5fa
comparison
equal deleted inserted replaced
1255:e3a4305c6bc3 1256:c09ee209b65c
1 /* 1 /*
2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved. 2 * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008, 2009 Red Hat, Inc. 3 * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 * 5 *
6 * This code is free software; you can redistribute it and/or modify it 6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as 7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation. 8 * published by the Free Software Foundation.
143 // Resume the interpreter 143 // Resume the interpreter
144 istate->set_msg(BytecodeInterpreter::got_monitors); 144 istate->set_msg(BytecodeInterpreter::got_monitors);
145 } 145 }
146 else if (istate->msg() == BytecodeInterpreter::return_from_method) { 146 else if (istate->msg() == BytecodeInterpreter::return_from_method) {
147 // Copy the result into the caller's frame 147 // Copy the result into the caller's frame
148 result_slots = type2size[method->result_type()]; 148 result_slots = type2size[result_type_of(method)];
149 assert(result_slots >= 0 && result_slots <= 2, "what?"); 149 assert(result_slots >= 0 && result_slots <= 2, "what?");
150 result = istate->stack() + result_slots; 150 result = istate->stack() + result_slots;
151 break; 151 break;
152 } 152 }
153 else if (istate->msg() == BytecodeInterpreter::throwing_exception) { 153 else if (istate->msg() == BytecodeInterpreter::throwing_exception) {
392 // Pop our parameters 392 // Pop our parameters
393 stack->set_sp(stack->sp() + method->size_of_parameters()); 393 stack->set_sp(stack->sp() + method->size_of_parameters());
394 394
395 // Push our result 395 // Push our result
396 if (!HAS_PENDING_EXCEPTION) { 396 if (!HAS_PENDING_EXCEPTION) {
397 stack->set_sp(stack->sp() - type2size[method->result_type()]); 397 BasicType type = result_type_of(method);
398 398 stack->set_sp(stack->sp() - type2size[type]);
399 switch (method->result_type()) { 399
400 switch (type) {
400 case T_VOID: 401 case T_VOID:
401 break; 402 break;
402 403
403 case T_BOOLEAN: 404 case T_BOOLEAN:
404 #ifndef VM_LITTLE_ENDIAN 405 #ifndef VM_LITTLE_ENDIAN
703 default : ShouldNotReachHere(); 704 default : ShouldNotReachHere();
704 } 705 }
705 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, 706 assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
706 "index out of bounds"); 707 "index out of bounds");
707 return i; 708 return i;
709 }
710
711 BasicType CppInterpreter::result_type_of(methodOop method) {
712 BasicType t;
713 switch (method->result_index()) {
714 case 0 : t = T_BOOLEAN; break;
715 case 1 : t = T_CHAR; break;
716 case 2 : t = T_BYTE; break;
717 case 3 : t = T_SHORT; break;
718 case 4 : t = T_INT; break;
719 case 5 : t = T_LONG; break;
720 case 6 : t = T_VOID; break;
721 case 7 : t = T_FLOAT; break;
722 case 8 : t = T_DOUBLE; break;
723 case 9 : t = T_OBJECT; break;
724 default: ShouldNotReachHere();
725 }
726 assert(AbstractInterpreter::BasicType_as_index(t) == method->result_index(),
727 "out of step with AbstractInterpreter::BasicType_as_index");
728 return t;
708 } 729 }
709 730
710 address InterpreterGenerator::generate_empty_entry() { 731 address InterpreterGenerator::generate_empty_entry() {
711 if (!UseFastEmptyMethods) 732 if (!UseFastEmptyMethods)
712 return NULL; 733 return NULL;