Mercurial > hg > truffle
view src/cpu/sparc/vm/c1_FrameMap_sparc.cpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Thu, 20 Nov 2008 16:56:09 -0800 |
parents | a61af66fc99e |
children | 6b2273dd6fa9 |
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/* * Copyright 1999-2006 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/_c1_FrameMap_sparc.cpp.incl" const int FrameMap::pd_c_runtime_reserved_arg_size = 7; LIR_Opr FrameMap::map_to_opr(BasicType type, VMRegPair* reg, bool outgoing) { LIR_Opr opr = LIR_OprFact::illegalOpr; VMReg r_1 = reg->first(); VMReg r_2 = reg->second(); if (r_1->is_stack()) { // Convert stack slot to an SP offset // The calling convention does not count the SharedRuntime::out_preserve_stack_slots() value // so we must add it in here. int st_off = (r_1->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; opr = LIR_OprFact::address(new LIR_Address(SP_opr, st_off + STACK_BIAS, type)); } else if (r_1->is_Register()) { Register reg = r_1->as_Register(); if (outgoing) { assert(!reg->is_in(), "should be using I regs"); } else { assert(!reg->is_out(), "should be using O regs"); } if (r_2->is_Register() && (type == T_LONG || type == T_DOUBLE)) { opr = as_long_opr(reg); } else if (type == T_OBJECT || type == T_ARRAY) { opr = as_oop_opr(reg); } else { opr = as_opr(reg); } } else if (r_1->is_FloatRegister()) { assert(type == T_DOUBLE || type == T_FLOAT, "wrong type"); FloatRegister f = r_1->as_FloatRegister(); if (type == T_DOUBLE) { opr = as_double_opr(f); } else { opr = as_float_opr(f); } } return opr; } // FrameMap //-------------------------------------------------------- FloatRegister FrameMap::_fpu_regs [FrameMap::nof_fpu_regs]; // some useful constant RInfo's: LIR_Opr FrameMap::in_long_opr; LIR_Opr FrameMap::out_long_opr; LIR_Opr FrameMap::F0_opr; LIR_Opr FrameMap::F0_double_opr; LIR_Opr FrameMap::G0_opr; LIR_Opr FrameMap::G1_opr; LIR_Opr FrameMap::G2_opr; LIR_Opr FrameMap::G3_opr; LIR_Opr FrameMap::G4_opr; LIR_Opr FrameMap::G5_opr; LIR_Opr FrameMap::G6_opr; LIR_Opr FrameMap::G7_opr; LIR_Opr FrameMap::O0_opr; LIR_Opr FrameMap::O1_opr; LIR_Opr FrameMap::O2_opr; LIR_Opr FrameMap::O3_opr; LIR_Opr FrameMap::O4_opr; LIR_Opr FrameMap::O5_opr; LIR_Opr FrameMap::O6_opr; LIR_Opr FrameMap::O7_opr; LIR_Opr FrameMap::L0_opr; LIR_Opr FrameMap::L1_opr; LIR_Opr FrameMap::L2_opr; LIR_Opr FrameMap::L3_opr; LIR_Opr FrameMap::L4_opr; LIR_Opr FrameMap::L5_opr; LIR_Opr FrameMap::L6_opr; LIR_Opr FrameMap::L7_opr; LIR_Opr FrameMap::I0_opr; LIR_Opr FrameMap::I1_opr; LIR_Opr FrameMap::I2_opr; LIR_Opr FrameMap::I3_opr; LIR_Opr FrameMap::I4_opr; LIR_Opr FrameMap::I5_opr; LIR_Opr FrameMap::I6_opr; LIR_Opr FrameMap::I7_opr; LIR_Opr FrameMap::G0_oop_opr; LIR_Opr FrameMap::G1_oop_opr; LIR_Opr FrameMap::G2_oop_opr; LIR_Opr FrameMap::G3_oop_opr; LIR_Opr FrameMap::G4_oop_opr; LIR_Opr FrameMap::G5_oop_opr; LIR_Opr FrameMap::G6_oop_opr; LIR_Opr FrameMap::G7_oop_opr; LIR_Opr FrameMap::O0_oop_opr; LIR_Opr FrameMap::O1_oop_opr; LIR_Opr FrameMap::O2_oop_opr; LIR_Opr FrameMap::O3_oop_opr; LIR_Opr FrameMap::O4_oop_opr; LIR_Opr FrameMap::O5_oop_opr; LIR_Opr FrameMap::O6_oop_opr; LIR_Opr FrameMap::O7_oop_opr; LIR_Opr FrameMap::L0_oop_opr; LIR_Opr FrameMap::L1_oop_opr; LIR_Opr FrameMap::L2_oop_opr; LIR_Opr FrameMap::L3_oop_opr; LIR_Opr FrameMap::L4_oop_opr; LIR_Opr FrameMap::L5_oop_opr; LIR_Opr FrameMap::L6_oop_opr; LIR_Opr FrameMap::L7_oop_opr; LIR_Opr FrameMap::I0_oop_opr; LIR_Opr FrameMap::I1_oop_opr; LIR_Opr FrameMap::I2_oop_opr; LIR_Opr FrameMap::I3_oop_opr; LIR_Opr FrameMap::I4_oop_opr; LIR_Opr FrameMap::I5_oop_opr; LIR_Opr FrameMap::I6_oop_opr; LIR_Opr FrameMap::I7_oop_opr; LIR_Opr FrameMap::SP_opr; LIR_Opr FrameMap::FP_opr; LIR_Opr FrameMap::Oexception_opr; LIR_Opr FrameMap::Oissuing_pc_opr; LIR_Opr FrameMap::_caller_save_cpu_regs[] = { 0, }; LIR_Opr FrameMap::_caller_save_fpu_regs[] = { 0, }; FloatRegister FrameMap::nr2floatreg (int rnr) { assert(_init_done, "tables not initialized"); debug_only(fpu_range_check(rnr);) return _fpu_regs[rnr]; } // returns true if reg could be smashed by a callee. bool FrameMap::is_caller_save_register (LIR_Opr reg) { if (reg->is_single_fpu() || reg->is_double_fpu()) { return true; } if (reg->is_double_cpu()) { return is_caller_save_register(reg->as_register_lo()) || is_caller_save_register(reg->as_register_hi()); } return is_caller_save_register(reg->as_register()); } NEEDS_CLEANUP // once the new calling convention is enabled, we no // longer need to treat I5, I4 and L0 specially // Because the interpreter destroys caller's I5, I4 and L0, // we must spill them before doing a Java call as we may land in // interpreter. bool FrameMap::is_caller_save_register (Register r) { return (r->is_global() && (r != G0)) || r->is_out(); } void FrameMap::init () { if (_init_done) return; int i=0; // Register usage: // O6: sp // I6: fp // I7: return address // G0: zero // G2: thread // G7: not available // G6: not available /* 0 */ map_register(i++, L0); /* 1 */ map_register(i++, L1); /* 2 */ map_register(i++, L2); /* 3 */ map_register(i++, L3); /* 4 */ map_register(i++, L4); /* 5 */ map_register(i++, L5); /* 6 */ map_register(i++, L6); /* 7 */ map_register(i++, L7); /* 8 */ map_register(i++, I0); /* 9 */ map_register(i++, I1); /* 10 */ map_register(i++, I2); /* 11 */ map_register(i++, I3); /* 12 */ map_register(i++, I4); /* 13 */ map_register(i++, I5); /* 14 */ map_register(i++, O0); /* 15 */ map_register(i++, O1); /* 16 */ map_register(i++, O2); /* 17 */ map_register(i++, O3); /* 18 */ map_register(i++, O4); /* 19 */ map_register(i++, O5); // <- last register visible in RegAlloc (RegAlloc::nof+cpu_regs) /* 20 */ map_register(i++, G1); /* 21 */ map_register(i++, G3); /* 22 */ map_register(i++, G4); /* 23 */ map_register(i++, G5); /* 24 */ map_register(i++, G0); // the following registers are not normally available /* 25 */ map_register(i++, O7); /* 26 */ map_register(i++, G2); /* 27 */ map_register(i++, O6); /* 28 */ map_register(i++, I6); /* 29 */ map_register(i++, I7); /* 30 */ map_register(i++, G6); /* 31 */ map_register(i++, G7); assert(i == nof_cpu_regs, "number of CPU registers"); for (i = 0; i < nof_fpu_regs; i++) { _fpu_regs[i] = as_FloatRegister(i); } _init_done = true; in_long_opr = as_long_opr(I0); out_long_opr = as_long_opr(O0); G0_opr = as_opr(G0); G1_opr = as_opr(G1); G2_opr = as_opr(G2); G3_opr = as_opr(G3); G4_opr = as_opr(G4); G5_opr = as_opr(G5); G6_opr = as_opr(G6); G7_opr = as_opr(G7); O0_opr = as_opr(O0); O1_opr = as_opr(O1); O2_opr = as_opr(O2); O3_opr = as_opr(O3); O4_opr = as_opr(O4); O5_opr = as_opr(O5); O6_opr = as_opr(O6); O7_opr = as_opr(O7); L0_opr = as_opr(L0); L1_opr = as_opr(L1); L2_opr = as_opr(L2); L3_opr = as_opr(L3); L4_opr = as_opr(L4); L5_opr = as_opr(L5); L6_opr = as_opr(L6); L7_opr = as_opr(L7); I0_opr = as_opr(I0); I1_opr = as_opr(I1); I2_opr = as_opr(I2); I3_opr = as_opr(I3); I4_opr = as_opr(I4); I5_opr = as_opr(I5); I6_opr = as_opr(I6); I7_opr = as_opr(I7); G0_oop_opr = as_oop_opr(G0); G1_oop_opr = as_oop_opr(G1); G2_oop_opr = as_oop_opr(G2); G3_oop_opr = as_oop_opr(G3); G4_oop_opr = as_oop_opr(G4); G5_oop_opr = as_oop_opr(G5); G6_oop_opr = as_oop_opr(G6); G7_oop_opr = as_oop_opr(G7); O0_oop_opr = as_oop_opr(O0); O1_oop_opr = as_oop_opr(O1); O2_oop_opr = as_oop_opr(O2); O3_oop_opr = as_oop_opr(O3); O4_oop_opr = as_oop_opr(O4); O5_oop_opr = as_oop_opr(O5); O6_oop_opr = as_oop_opr(O6); O7_oop_opr = as_oop_opr(O7); L0_oop_opr = as_oop_opr(L0); L1_oop_opr = as_oop_opr(L1); L2_oop_opr = as_oop_opr(L2); L3_oop_opr = as_oop_opr(L3); L4_oop_opr = as_oop_opr(L4); L5_oop_opr = as_oop_opr(L5); L6_oop_opr = as_oop_opr(L6); L7_oop_opr = as_oop_opr(L7); I0_oop_opr = as_oop_opr(I0); I1_oop_opr = as_oop_opr(I1); I2_oop_opr = as_oop_opr(I2); I3_oop_opr = as_oop_opr(I3); I4_oop_opr = as_oop_opr(I4); I5_oop_opr = as_oop_opr(I5); I6_oop_opr = as_oop_opr(I6); I7_oop_opr = as_oop_opr(I7); FP_opr = as_pointer_opr(FP); SP_opr = as_pointer_opr(SP); F0_opr = as_float_opr(F0); F0_double_opr = as_double_opr(F0); Oexception_opr = as_oop_opr(Oexception); Oissuing_pc_opr = as_opr(Oissuing_pc); _caller_save_cpu_regs[0] = FrameMap::O0_opr; _caller_save_cpu_regs[1] = FrameMap::O1_opr; _caller_save_cpu_regs[2] = FrameMap::O2_opr; _caller_save_cpu_regs[3] = FrameMap::O3_opr; _caller_save_cpu_regs[4] = FrameMap::O4_opr; _caller_save_cpu_regs[5] = FrameMap::O5_opr; for (int i = 0; i < nof_caller_save_fpu_regs; i++) { _caller_save_fpu_regs[i] = LIR_OprFact::single_fpu(i); } } Address FrameMap::make_new_address(ByteSize sp_offset) const { return Address(SP, 0, STACK_BIAS + in_bytes(sp_offset)); } VMReg FrameMap::fpu_regname (int n) { return as_FloatRegister(n)->as_VMReg(); } LIR_Opr FrameMap::stack_pointer() { return SP_opr; } bool FrameMap::validate_frame() { int max_offset = in_bytes(framesize_in_bytes()); int java_index = 0; for (int i = 0; i < _incoming_arguments->length(); i++) { LIR_Opr opr = _incoming_arguments->at(i); if (opr->is_stack()) { max_offset = MAX2(_argument_locations->at(java_index), max_offset); } java_index += type2size[opr->type()]; } return Assembler::is_simm13(max_offset + STACK_BIAS); }