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1 /*
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2 * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class ciMethod;
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26 class CallingConvention;
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27 class BasicTypeArray;
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28 class BasicTypeList;
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29
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30 //--------------------------------------------------------
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31 // FrameMap
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32 //--------------------------------------------------------
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33
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34 // This class is responsible of mapping items (locals, monitors, spill
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35 // slots and registers to their frame location
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36 //
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37 // The monitors are specified by a consecutive index, although each monitor entry
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38 // occupies two words. The monitor_index is 0.._num_monitors
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39 // The spill index is similar to local index; it is in range 0..(open)
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40 //
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41 // The CPU registers are mapped using a fixed table; register with number 0
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42 // is the most used one.
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43
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44
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45 // stack grow direction --> SP
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46 // +----------+---+----------+-------+------------------------+-----+
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47 // |arguments | x | monitors | spill | reserved argument area | ABI |
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48 // +----------+---+----------+-------+------------------------+-----+
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49 //
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50 // x = ABI area (SPARC) or return adress and link (i486)
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51 // ABI = ABI area (SPARC) or nothing (i486)
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52
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53
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54 class LIR_OprDesc;
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55 typedef LIR_OprDesc* LIR_Opr;
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56
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57
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58 class FrameMap : public CompilationResourceObj {
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59 public:
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60 enum {
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61 nof_cpu_regs = pd_nof_cpu_regs_frame_map,
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62 nof_fpu_regs = pd_nof_fpu_regs_frame_map,
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63
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64 nof_cpu_regs_reg_alloc = pd_nof_cpu_regs_reg_alloc,
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65 nof_fpu_regs_reg_alloc = pd_nof_fpu_regs_reg_alloc,
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66
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67 nof_caller_save_cpu_regs = pd_nof_caller_save_cpu_regs_frame_map,
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68 nof_caller_save_fpu_regs = pd_nof_caller_save_fpu_regs_frame_map,
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69
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70 spill_slot_size_in_bytes = 4
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71 };
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72
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73 # include "incls/_c1_FrameMap_pd.hpp.incl" // platform dependent declarations
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74
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75 friend class LIR_OprDesc;
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76
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77 private:
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78 static bool _init_done;
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79 static Register _cpu_rnr2reg [nof_cpu_regs];
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80 static int _cpu_reg2rnr [nof_cpu_regs];
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81
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82 static LIR_Opr _caller_save_cpu_regs [nof_caller_save_cpu_regs];
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83 static LIR_Opr _caller_save_fpu_regs [nof_caller_save_fpu_regs];
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84
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85 int _framesize;
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86 int _argcount;
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87 int _num_monitors;
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88 int _num_spills;
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89 int _reserved_argument_area_size;
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90 int _oop_map_arg_count;
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91
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92 CallingConvention* _incoming_arguments;
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93 intArray* _argument_locations;
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94
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95 void check_spill_index (int spill_index) const { assert(spill_index >= 0, "bad index"); }
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96 void check_monitor_index (int monitor_index) const { assert(monitor_index >= 0 &&
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97 monitor_index < _num_monitors, "bad index"); }
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98
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99 static Register cpu_rnr2reg (int rnr) {
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100 assert(_init_done, "tables not initialized");
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101 debug_only(cpu_range_check(rnr);)
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102 return _cpu_rnr2reg[rnr];
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103 }
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104
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105 static int cpu_reg2rnr (Register reg) {
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106 assert(_init_done, "tables not initialized");
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107 debug_only(cpu_range_check(reg->encoding());)
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108 return _cpu_reg2rnr[reg->encoding()];
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109 }
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110
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111 static void map_register(int rnr, Register reg) {
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112 debug_only(cpu_range_check(rnr);)
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113 debug_only(cpu_range_check(reg->encoding());)
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114 _cpu_rnr2reg[rnr] = reg;
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115 _cpu_reg2rnr[reg->encoding()] = rnr;
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116 }
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117
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118 void update_reserved_argument_area_size (int size) {
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119 assert(size >= 0, "check");
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120 _reserved_argument_area_size = MAX2(_reserved_argument_area_size, size);
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121 }
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122
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123 protected:
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124 #ifndef PRODUCT
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125 static void cpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_cpu_regs, "cpu register number is too big"); }
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126 static void fpu_range_check (int rnr) { assert(0 <= rnr && rnr < nof_fpu_regs, "fpu register number is too big"); }
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127 #endif
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128
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129
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130 ByteSize sp_offset_for_monitor_base(const int idx) const;
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131
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132 Address make_new_address(ByteSize sp_offset) const;
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133
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134 ByteSize sp_offset_for_slot(const int idx) const;
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135 ByteSize sp_offset_for_double_slot(const int idx) const;
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136 ByteSize sp_offset_for_spill(const int idx) const;
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137 ByteSize sp_offset_for_monitor_lock(int monitor_index) const;
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138 ByteSize sp_offset_for_monitor_object(int monitor_index) const;
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139
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140 VMReg sp_offset2vmreg(ByteSize offset) const;
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141
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142 // platform dependent hook used to check that frame is properly
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143 // addressable on the platform. Used by sparc to verify that all
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144 // stack addresses are expressable in a simm13.
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145 bool validate_frame();
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146
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147 static LIR_Opr map_to_opr(BasicType type, VMRegPair* reg, bool incoming);
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148
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149 public:
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150 // Opr representing the stack_pointer on this platform
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151 static LIR_Opr stack_pointer();
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152
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153 static BasicTypeArray* signature_type_array_for(const ciMethod* method);
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154 static BasicTypeArray* signature_type_array_for(const char * signature);
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155
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156 // for outgoing calls, these also update the reserved area to
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157 // include space for arguments and any ABI area.
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158 CallingConvention* c_calling_convention (const BasicTypeArray* signature);
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159 CallingConvention* java_calling_convention (const BasicTypeArray* signature, bool outgoing);
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160
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161 // deopt support
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162 ByteSize sp_offset_for_orig_pc() { return sp_offset_for_monitor_base(_num_monitors); }
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163
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164 static LIR_Opr as_opr(Register r) {
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165 return LIR_OprFact::single_cpu(cpu_reg2rnr(r));
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166 }
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167 static LIR_Opr as_oop_opr(Register r) {
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168 return LIR_OprFact::single_cpu_oop(cpu_reg2rnr(r));
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169 }
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170
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171 FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size);
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172 bool finalize_frame(int nof_slots);
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173
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174 int reserved_argument_area_size () const { return _reserved_argument_area_size; }
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175 int framesize () const { assert(_framesize != -1, "hasn't been calculated"); return _framesize; }
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176 ByteSize framesize_in_bytes () const { return in_ByteSize(framesize() * 4); }
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177 int num_monitors () const { return _num_monitors; }
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178 int num_spills () const { assert(_num_spills >= 0, "not set"); return _num_spills; }
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179 int argcount () const { assert(_argcount >= 0, "not set"); return _argcount; }
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180
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181 int oop_map_arg_count() const { return _oop_map_arg_count; }
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182
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183 CallingConvention* incoming_arguments() const { return _incoming_arguments; }
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184
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185 // convenience routines
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186 Address address_for_slot(int index, int sp_adjust = 0) const {
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187 return make_new_address(sp_offset_for_slot(index) + in_ByteSize(sp_adjust));
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188 }
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189 Address address_for_double_slot(int index, int sp_adjust = 0) const {
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190 return make_new_address(sp_offset_for_double_slot(index) + in_ByteSize(sp_adjust));
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191 }
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192 Address address_for_monitor_lock(int monitor_index) const {
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193 return make_new_address(sp_offset_for_monitor_lock(monitor_index));
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194 }
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195 Address address_for_monitor_object(int monitor_index) const {
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196 return make_new_address(sp_offset_for_monitor_object(monitor_index));
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197 }
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198
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199 void print_frame_layout() const;
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200
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201 // Creates Location describing desired slot and returns it via pointer
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202 // to Location object. Returns true if the stack frame offset was legal
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203 // (as defined by Location::legal_offset_in_bytes()), false otherwise.
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204 // Do not use the returned location if this returns false.
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205 bool location_for_sp_offset(ByteSize byte_offset_from_sp,
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206 Location::Type loc_type, Location* loc) const;
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207
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208 bool location_for_monitor_lock (int monitor_index, Location* loc) const {
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209 return location_for_sp_offset(sp_offset_for_monitor_lock(monitor_index), Location::normal, loc);
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210 }
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211 bool location_for_monitor_object(int monitor_index, Location* loc) const {
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212 return location_for_sp_offset(sp_offset_for_monitor_object(monitor_index), Location::oop, loc);
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213 }
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214 bool locations_for_slot (int index, Location::Type loc_type,
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215 Location* loc, Location* second = NULL) const;
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216
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217 VMReg slot_regname(int index) const {
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218 return sp_offset2vmreg(sp_offset_for_slot(index));
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219 }
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220 VMReg monitor_object_regname(int monitor_index) const {
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221 return sp_offset2vmreg(sp_offset_for_monitor_object(monitor_index));
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222 }
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223 VMReg regname(LIR_Opr opr) const;
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224
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225 static LIR_Opr caller_save_cpu_reg_at(int i) {
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226 assert(i >= 0 && i < nof_caller_save_cpu_regs, "out of bounds");
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227 return _caller_save_cpu_regs[i];
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228 }
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229
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230 static LIR_Opr caller_save_fpu_reg_at(int i) {
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231 assert(i >= 0 && i < nof_caller_save_fpu_regs, "out of bounds");
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232 return _caller_save_fpu_regs[i];
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233 }
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234
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235 static void init();
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236 };
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237
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238 // CallingConvention
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239 //--------------------------------------------------------
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240
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241 class CallingConvention: public ResourceObj {
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242 private:
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243 LIR_OprList* _args;
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244 int _reserved_stack_slots;
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245
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246 public:
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247 CallingConvention (LIR_OprList* args, int reserved_stack_slots)
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248 : _args(args)
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249 , _reserved_stack_slots(reserved_stack_slots) {}
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250
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251 LIR_OprList* args() { return _args; }
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252
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253 LIR_Opr at(int i) const { return _args->at(i); }
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254 int length() const { return _args->length(); }
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255
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256 // Indicates number of real frame slots used by arguments passed on stack.
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257 int reserved_stack_slots() const { return _reserved_stack_slots; }
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258
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259 #ifndef PRODUCT
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260 void print () const {
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261 for (int i = 0; i < length(); i++) {
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262 at(i)->print();
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263 }
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264 }
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265 #endif // PRODUCT
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266 };
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