Mercurial > hg > truffle
view src/cpu/x86/vm/c1_FrameMap_x86.hpp @ 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 | 9ee9cf798b59 |
children | fc2c71045ada |
line wrap: on
line source
/* * Copyright 1999-2008 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. * */ // On i486 the frame looks as follows: // // +-----------------------------+---------+----------------------------------------+----------------+----------- // | size_arguments-nof_reg_args | 2 words | size_locals-size_arguments+numreg_args | _size_monitors | spilling . // +-----------------------------+---------+----------------------------------------+----------------+----------- // // The FPU registers are mapped with their offset from TOS; therefore the // status of FPU stack must be updated during code emission. public: static const int pd_c_runtime_reserved_arg_size; enum { nof_xmm_regs = pd_nof_xmm_regs_frame_map, nof_caller_save_xmm_regs = pd_nof_caller_save_xmm_regs_frame_map, first_available_sp_in_frame = 0, #ifndef _LP64 frame_pad_in_bytes = 8, nof_reg_args = 2 #else frame_pad_in_bytes = 16, nof_reg_args = 6 #endif // _LP64 }; private: static LIR_Opr _caller_save_xmm_regs [nof_caller_save_xmm_regs]; static XMMRegister _xmm_regs[nof_xmm_regs]; public: static LIR_Opr receiver_opr; static LIR_Opr rsi_opr; static LIR_Opr rdi_opr; static LIR_Opr rbx_opr; static LIR_Opr rax_opr; static LIR_Opr rdx_opr; static LIR_Opr rcx_opr; static LIR_Opr rsp_opr; static LIR_Opr rbp_opr; static LIR_Opr rsi_oop_opr; static LIR_Opr rdi_oop_opr; static LIR_Opr rbx_oop_opr; static LIR_Opr rax_oop_opr; static LIR_Opr rdx_oop_opr; static LIR_Opr rcx_oop_opr; #ifdef _LP64 static LIR_Opr r8_opr; static LIR_Opr r9_opr; static LIR_Opr r10_opr; static LIR_Opr r11_opr; static LIR_Opr r12_opr; static LIR_Opr r13_opr; static LIR_Opr r14_opr; static LIR_Opr r15_opr; static LIR_Opr r8_oop_opr; static LIR_Opr r9_oop_opr; static LIR_Opr r11_oop_opr; static LIR_Opr r12_oop_opr; static LIR_Opr r13_oop_opr; static LIR_Opr r14_oop_opr; #endif // _LP64 static LIR_Opr long0_opr; static LIR_Opr long1_opr; static LIR_Opr fpu0_float_opr; static LIR_Opr fpu0_double_opr; static LIR_Opr xmm0_float_opr; static LIR_Opr xmm0_double_opr; #ifdef _LP64 static LIR_Opr as_long_opr(Register r) { return LIR_OprFact::double_cpu(cpu_reg2rnr(r), cpu_reg2rnr(r)); } static LIR_Opr as_pointer_opr(Register r) { return LIR_OprFact::double_cpu(cpu_reg2rnr(r), cpu_reg2rnr(r)); } #else static LIR_Opr as_long_opr(Register r, Register r2) { return LIR_OprFact::double_cpu(cpu_reg2rnr(r), cpu_reg2rnr(r2)); } static LIR_Opr as_pointer_opr(Register r) { return LIR_OprFact::single_cpu(cpu_reg2rnr(r)); } #endif // _LP64 // VMReg name for spilled physical FPU stack slot n static VMReg fpu_regname (int n); static XMMRegister nr2xmmreg(int rnr); static bool is_caller_save_register (LIR_Opr opr) { return true; } static bool is_caller_save_register (Register r) { return true; } static LIR_Opr caller_save_xmm_reg_at(int i) { assert(i >= 0 && i < nof_caller_save_xmm_regs, "out of bounds"); return _caller_save_xmm_regs[i]; }