Mercurial > hg > truffle
view src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 624:337400e7a5dd
6797305: Add LoadUB and LoadUI opcode class
Summary: Add a LoadUB (unsigned byte) and LoadUI (unsigned int) opcode class so we have these load optimizations in the first place and do not need to handle them in the matcher.
Reviewed-by: never, kvn
author | twisti |
---|---|
date | Mon, 09 Mar 2009 03:17:11 -0700 |
parents | 9adddb8c0fc8 |
children | 660978a2a31a |
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/* * Copyright 1997-2008 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(); __ load_klass(O0, 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(); if (PrintMiscellaneous && (WizardMode || Verbose)) { tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d", vtable_index, s->entry_point(), (int)(s->code_end() - s->entry_point()), (int)(s->code_end() - __ pc())); } guarantee(__ pc() <= s->code_end(), "overflowed buffer"); 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 itable_index) { const int sparc_code_length = VtableStub::pd_code_size_limit(false); VtableStub* s = new(sparc_code_length) VtableStub(false, itable_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(); __ load_klass(O0, 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); #ifndef PRODUCT if (CountCompiledCalls) { Address ctr(L0, SharedRuntime::nof_megamorphic_calls_addr()); __ sethi(ctr); __ ld(ctr, L1); __ inc(L1); __ st(L1, ctr); } #endif /* PRODUCT */ Label throw_icce; Register L5_method = L5; __ lookup_interface_method(// inputs: rec. class, interface, itable index G3_klassOop, G5_interface, itable_index, // outputs: method, scan temp. reg L5_method, L2, L3, throw_icce); #ifndef PRODUCT if (DebugVtables) { Label L01; __ bpr(Assembler::rc_nz, false, Assembler::pt, L5_method, L01); __ delayed()->nop(); __ stop("methodOop is null"); __ bind(L01); __ verify_oop(L5_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(L5_method, 0, G5_method); // 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(); __ bind(throw_icce); Address icce(G3_scratch, StubRoutines::throw_IncompatibleClassChangeError_entry()); __ jump_to(icce, 0); __ delayed()->restore(); masm->flush(); if (PrintMiscellaneous && (WizardMode || Verbose)) { tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d", itable_index, s->entry_point(), (int)(s->code_end() - s->entry_point()), (int)(s->code_end() - __ pc())); } guarantee(__ pc() <= s->code_end(), "overflowed buffer"); 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 1000; else { const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) if (is_vtable_stub) { // ld;ld;ld,jmp,nop const int basic = 5*BytesPerInstWord + // shift;add for load_klass (UseCompressedOops ? 2*BytesPerInstWord : 0); return basic + slop; } else { const int basic = (28 LP64_ONLY(+ 6)) * BytesPerInstWord + // shift;add for load_klass (UseCompressedOops ? 2*BytesPerInstWord : 0); 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; }