truffle: src/cpu/sparc/vm/vtableStubs

comparison src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	f8236e79048a

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--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 1997-2006 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/_vtableStubs_sparc.cpp.incl"
+// machine-dependent part of VtableStubs: create vtableStub of correct size and
+// initialize its code
+#define __ masm->
+#ifndef PRODUCT
+extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index);
+#endif
+// Used by compiler only; may use only caller saved, non-argument registers
+// NOTE:  %%%% if any change is made to this stub make sure that the function
+//             pd_code_size_limit is changed to ensure the correct size for VtableStub
+VtableStub* VtableStubs::create_vtable_stub(int vtable_index) {
+const int sparc_code_length = VtableStub::pd_code_size_limit(true);
+VtableStub* s = new(sparc_code_length) VtableStub(true, vtable_index);
+ResourceMark rm;
+CodeBuffer cb(s->entry_point(), sparc_code_length);
+MacroAssembler* masm = new MacroAssembler(&cb);
+#ifndef PRODUCT
+if (CountCompiledCalls) {
+Address ctr(G5, SharedRuntime::nof_megamorphic_calls_addr());
+__ sethi(ctr);
+__ ld(ctr, G3_scratch);
+__ inc(G3_scratch);
+__ st(G3_scratch, ctr);
+}
+#endif /* PRODUCT */
+assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0");
+// get receiver klass
+address npe_addr = __ pc();
+__ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), G3_scratch);
+// set methodOop (in case of interpreted method), and destination address
+int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size();
+#ifndef PRODUCT
+if (DebugVtables) {
+Label L;
+// check offset vs vtable length
+__ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5);
+__ cmp(G5, vtable_index*vtableEntry::size());
+__ br(Assembler::greaterUnsigned, false, Assembler::pt, L);
+__ delayed()->nop();
+__ set(vtable_index, O2);
+__ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2);
+__ bind(L);
+}
+#endif
+int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes();
+if( __ is_simm13(v_off) ) {
+__ ld_ptr(G3, v_off, G5_method);
+} else {
+__ set(v_off,G5);
+__ ld_ptr(G3, G5, G5_method);
+}
+#ifndef PRODUCT
+if (DebugVtables) {
+Label L;
+__ br_notnull(G5_method, false, Assembler::pt, L);
+__ delayed()->nop();
+__ stop("Vtable entry is ZERO");
+__ bind(L);
+}
+#endif
+address ame_addr = __ pc();  // if the vtable entry is null, the method is abstract
+// NOTE: for vtable dispatches, the vtable entry will never be null.
+__ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch);
+// jump to target (either compiled code or c2iadapter)
+__ JMP(G3_scratch, 0);
+// load methodOop (in case we call c2iadapter)
+__ delayed()->nop();
+masm->flush();
+s->set_exception_points(npe_addr, ame_addr);
+return s;
+}
+// NOTE:  %%%% if any change is made to this stub make sure that the function
+//             pd_code_size_limit is changed to ensure the correct size for VtableStub
+VtableStub* VtableStubs::create_itable_stub(int vtable_index) {
+const int sparc_code_length = VtableStub::pd_code_size_limit(false);
+VtableStub* s = new(sparc_code_length) VtableStub(false, vtable_index);
+ResourceMark rm;
+CodeBuffer cb(s->entry_point(), sparc_code_length);
+MacroAssembler* masm = new MacroAssembler(&cb);
+Register G3_klassOop = G3_scratch;
+Register G5_interface = G5;  // Passed in as an argument
+Label search;
+// Entry arguments:
+//  G5_interface: Interface
+//  O0:           Receiver
+assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0");
+// get receiver klass (also an implicit null-check)
+address npe_addr = __ pc();
+__ ld_ptr(O0, oopDesc::klass_offset_in_bytes(), G3_klassOop);
+__ verify_oop(G3_klassOop);
+// Push a new window to get some temp registers.  This chops the head of all
+// my 64-bit %o registers in the LION build, but this is OK because no longs
+// are passed in the %o registers.  Instead, longs are passed in G1 and G4
+// and so those registers are not available here.
+__ save(SP,-frame::register_save_words*wordSize,SP);
+Register I0_receiver = I0;    // Location of receiver after save
+#ifndef PRODUCT
+if (CountCompiledCalls) {
+Address ctr(L0, SharedRuntime::nof_megamorphic_calls_addr());
+__ sethi(ctr);
+__ ld(ctr, L1);
+__ inc(L1);
+__ st(L1, ctr);
+}
+#endif /* PRODUCT */
+// load start of itable entries into L0 register
+const int base = instanceKlass::vtable_start_offset() * wordSize;
+__ ld(Address(G3_klassOop, 0, instanceKlass::vtable_length_offset() * wordSize), L0);
+// %%% Could store the aligned, prescaled offset in the klassoop.
+__ sll(L0, exact_log2(vtableEntry::size() * wordSize), L0);
+// see code for instanceKlass::start_of_itable!
+const int vtable_alignment = align_object_offset(1);
+assert(vtable_alignment == 1 || vtable_alignment == 2, "");
+const int odd_bit = vtableEntry::size() * wordSize;
+if (vtable_alignment == 2) {
+__ and3(L0, odd_bit, L1);   // isolate the odd bit
+}
+__ add(G3_klassOop, L0, L0);
+if (vtable_alignment == 2) {
+__ add(L0, L1, L0);         // double the odd bit, to align up
+}
+// Loop over all itable entries until desired interfaceOop (G5_interface) found
+__ bind(search);
+// %%%% Could load both offset and interface in one ldx, if they were
+// in the opposite order.  This would save a load.
+__ ld_ptr(L0, base + itableOffsetEntry::interface_offset_in_bytes(), L1);
+#ifdef ASSERT
+Label ok;
+// Check that entry is non-null and an Oop
+__ bpr(Assembler::rc_nz, false, Assembler::pt, L1, ok);
+__ delayed()->nop();
+__ stop("null entry point found in itable's offset table");
+__ bind(ok);
+__ verify_oop(L1);
+#endif // ASSERT
+__ cmp(G5_interface, L1);
+__ brx(Assembler::notEqual, true, Assembler::pn, search);
+__ delayed()->add(L0, itableOffsetEntry::size() * wordSize, L0);
+// entry found and L0 points to it, move offset of vtable for interface into L0
+__ ld(L0, base + itableOffsetEntry::offset_offset_in_bytes(), L0);
+// Compute itableMethodEntry and get methodOop(G5_method) and entrypoint(L0) for compiler
+const int method_offset = (itableMethodEntry::size() * wordSize * vtable_index) + itableMethodEntry::method_offset_in_bytes();
+__ add(G3_klassOop, L0, L1);
+__ ld_ptr(L1, method_offset, G5_method);
+#ifndef PRODUCT
+if (DebugVtables) {
+Label L01;
+__ ld_ptr(L1, method_offset, G5_method);
+__ bpr(Assembler::rc_nz, false, Assembler::pt, G5_method, L01);
+__ delayed()->nop();
+__ stop("methodOop is null");
+__ bind(L01);
+__ verify_oop(G5_method);
+}
+#endif
+// If the following load is through a NULL pointer, we'll take an OS
+// exception that should translate into an AbstractMethodError.  We need the
+// window count to be correct at that time.
+__ restore();                 // Restore registers BEFORE the AME point
+address ame_addr = __ pc();   // if the vtable entry is null, the method is abstract
+__ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch);
+// G5_method:  methodOop
+// O0:         Receiver
+// G3_scratch: entry point
+__ JMP(G3_scratch, 0);
+__ delayed()->nop();
+masm->flush();
+s->set_exception_points(npe_addr, ame_addr);
+return s;
+}
+int VtableStub::pd_code_size_limit(bool is_vtable_stub) {
+if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 999;
+else {
+const int slop = 2*BytesPerInstWord; // sethi;add  (needed for long offsets)
+if (is_vtable_stub) {
+const int basic = 5*BytesPerInstWord; // ld;ld;ld,jmp,nop
+return basic + slop;
+} else {
+#ifdef ASSERT
+return 999;
+#endif // ASSERT
+const int basic = 17*BytesPerInstWord; // save, ld, ld, sll, and, add, add, ld, cmp, br, add, ld, add, ld, ld, jmp, restore
+return (basic + slop);
+}
+}
+}
+int VtableStub::pd_code_alignment() {
+// UltraSPARC cache line size is 8 instructions:
+const unsigned int icache_line_size = 32;
+return icache_line_size;
+}
+//Reconciliation History
+// 1.2 97/12/09 17:13:31 vtableStubs_i486.cpp
+// 1.4 98/01/21 19:18:37 vtableStubs_i486.cpp
+// 1.5 98/02/13 16:33:55 vtableStubs_i486.cpp
+// 1.7 98/03/05 17:17:28 vtableStubs_i486.cpp
+// 1.9 98/05/18 09:26:17 vtableStubs_i486.cpp
+// 1.10 98/05/26 16:28:13 vtableStubs_i486.cpp
+// 1.11 98/05/27 08:51:35 vtableStubs_i486.cpp
+// 1.12 98/06/15 15:04:12 vtableStubs_i486.cpp
+// 1.13 98/07/28 18:44:22 vtableStubs_i486.cpp
+// 1.15 98/08/28 11:31:19 vtableStubs_i486.cpp
+// 1.16 98/09/02 12:58:31 vtableStubs_i486.cpp
+// 1.17 98/09/04 12:15:52 vtableStubs_i486.cpp
+// 1.18 98/11/19 11:55:24 vtableStubs_i486.cpp
+// 1.19 99/01/12 14:57:56 vtableStubs_i486.cpp
+// 1.20 99/01/19 17:42:52 vtableStubs_i486.cpp
+// 1.22 99/01/21 10:29:25 vtableStubs_i486.cpp
+// 1.30 99/06/02 15:27:39 vtableStubs_i486.cpp
+// 1.26 99/06/24 14:25:07 vtableStubs_i486.cpp
+// 1.23 99/02/22 14:37:52 vtableStubs_i486.cpp
+// 1.28 99/06/29 18:06:17 vtableStubs_i486.cpp
+// 1.29 99/07/22 17:03:44 vtableStubs_i486.cpp
+// 1.30 99/08/11 09:33:27 vtableStubs_i486.cpp
+//End

Mercurial > hg > truffle

comparison src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 0:a61af66fc99e jdk7-b24