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1 /* |
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2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |
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26 #define CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |
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27 |
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28 // C1_MacroAssembler contains high-level macros for C1 |
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29 |
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30 private: |
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31 int _rsp_offset; // track rsp changes |
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32 // initialization |
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33 void pd_init() { _rsp_offset = 0; } |
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34 |
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35 public: |
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36 void try_allocate( |
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37 Register obj, // result: pointer to object after successful allocation |
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38 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise |
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39 int con_size_in_bytes, // object size in bytes if known at compile time |
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40 Register t1, // temp register |
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41 Register t2, // temp register |
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42 Label& slow_case // continuation point if fast allocation fails |
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43 ); |
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44 |
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45 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2); |
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46 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1); |
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47 |
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48 // locking |
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49 // hdr : must be rax, contents destroyed |
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50 // obj : must point to the object to lock, contents preserved |
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51 // disp_hdr: must point to the displaced header location, contents preserved |
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52 // scratch : scratch register, contents destroyed |
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53 // returns code offset at which to add null check debug information |
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54 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case); |
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55 |
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56 // unlocking |
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57 // hdr : contents destroyed |
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58 // obj : must point to the object to lock, contents preserved |
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59 // disp_hdr: must be eax & must point to the displaced header location, contents destroyed |
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60 void unlock_object(Register swap, Register obj, Register lock, Label& slow_case); |
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61 |
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62 void initialize_object( |
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63 Register obj, // result: pointer to object after successful allocation |
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64 Register klass, // object klass |
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65 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise |
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66 int con_size_in_bytes, // object size in bytes if known at compile time |
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67 Register t1, // temp register |
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68 Register t2, // temp register |
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69 bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB |
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70 ); |
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71 |
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72 // allocation of fixed-size objects |
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73 // (can also be used to allocate fixed-size arrays, by setting |
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74 // hdr_size correctly and storing the array length afterwards) |
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75 // obj : must be rax, will contain pointer to allocated object |
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76 // t1, t2 : scratch registers - contents destroyed |
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77 // header_size: size of object header in words |
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78 // object_size: total size of object in words |
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79 // slow_case : exit to slow case implementation if fast allocation fails |
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80 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case); |
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81 |
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82 enum { |
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83 max_array_allocation_length = 0x00FFFFFF |
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84 }; |
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85 |
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86 // allocation of arrays |
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87 // obj : must be rax, will contain pointer to allocated object |
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88 // len : array length in number of elements |
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89 // t : scratch register - contents destroyed |
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90 // header_size: size of object header in words |
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91 // f : element scale factor |
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92 // slow_case : exit to slow case implementation if fast allocation fails |
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93 void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case); |
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94 |
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95 int rsp_offset() const { return _rsp_offset; } |
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96 void set_rsp_offset(int n) { _rsp_offset = n; } |
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97 |
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98 // Note: NEVER push values directly, but only through following push_xxx functions; |
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99 // This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset) |
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100 |
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101 void push_jint (jint i) { _rsp_offset++; push(i); } |
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102 void push_oop (jobject o) { _rsp_offset++; pushoop(o); } |
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103 // Seems to always be in wordSize |
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104 void push_addr (Address a) { _rsp_offset++; pushptr(a); } |
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105 void push_reg (Register r) { _rsp_offset++; push(r); } |
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106 void pop_reg (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); } |
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107 |
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108 void dec_stack (int nof_words) { |
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109 _rsp_offset -= nof_words; |
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110 assert(_rsp_offset >= 0, "stack offset underflow"); |
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111 addptr(rsp, wordSize * nof_words); |
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112 } |
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113 |
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114 void dec_stack_after_call (int nof_words) { |
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115 _rsp_offset -= nof_words; |
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116 assert(_rsp_offset >= 0, "stack offset underflow"); |
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117 } |
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118 |
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119 void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN; |
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120 |
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121 // This platform only uses signal-based null checks. The Label is not needed. |
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122 void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); } |
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123 |
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124 #endif // CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |