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1 /*
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2 * Copyright 1999-2005 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 // C1_MacroAssembler contains high-level macros for C1
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26
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27 private:
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28 int _rsp_offset; // track rsp changes
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29 // initialization
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30 void pd_init() { _rsp_offset = 0; }
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31
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32 public:
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33 void try_allocate(
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34 Register obj, // result: pointer to object after successful allocation
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35 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
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36 int con_size_in_bytes, // object size in bytes if known at compile time
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37 Register t1, // temp register
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38 Register t2, // temp register
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39 Label& slow_case // continuation point if fast allocation fails
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40 );
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41
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42 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2);
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43 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1);
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44
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45 // locking
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46 // hdr : must be rax, contents destroyed
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47 // obj : must point to the object to lock, contents preserved
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48 // disp_hdr: must point to the displaced header location, contents preserved
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49 // scratch : scratch register, contents destroyed
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50 // returns code offset at which to add null check debug information
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51 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case);
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52
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53 // unlocking
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54 // hdr : contents destroyed
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55 // obj : must point to the object to lock, contents preserved
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56 // disp_hdr: must be eax & must point to the displaced header location, contents destroyed
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57 void unlock_object(Register swap, Register obj, Register lock, Label& slow_case);
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58
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59 void initialize_object(
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60 Register obj, // result: pointer to object after successful allocation
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61 Register klass, // object klass
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62 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise
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63 int con_size_in_bytes, // object size in bytes if known at compile time
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64 Register t1, // temp register
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65 Register t2 // temp register
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66 );
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67
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68 // allocation of fixed-size objects
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69 // (can also be used to allocate fixed-size arrays, by setting
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70 // hdr_size correctly and storing the array length afterwards)
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71 // obj : must be rax, will contain pointer to allocated object
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72 // t1, t2 : scratch registers - contents destroyed
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73 // header_size: size of object header in words
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74 // object_size: total size of object in words
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75 // slow_case : exit to slow case implementation if fast allocation fails
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76 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case);
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77
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78 enum {
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79 max_array_allocation_length = 0x00FFFFFF
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80 };
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81
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82 // allocation of arrays
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83 // obj : must be rax, will contain pointer to allocated object
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84 // len : array length in number of elements
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85 // t : scratch register - contents destroyed
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86 // header_size: size of object header in words
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87 // f : element scale factor
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88 // slow_case : exit to slow case implementation if fast allocation fails
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89 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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90
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91 int rsp_offset() const { return _rsp_offset; }
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92 void set_rsp_offset(int n) { _rsp_offset = n; }
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93
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94 // Note: NEVER push values directly, but only through following push_xxx functions;
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95 // This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset)
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96
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304
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97 void push_jint (jint i) { _rsp_offset++; push(i); }
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0
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98 void push_oop (jobject o) { _rsp_offset++; pushoop(o); }
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304
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99 // Seems to always be in wordSize
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100 void push_addr (Address a) { _rsp_offset++; pushptr(a); }
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101 void push_reg (Register r) { _rsp_offset++; push(r); }
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102 void pop_reg (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); }
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0
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103
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104 void dec_stack (int nof_words) {
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105 _rsp_offset -= nof_words;
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106 assert(_rsp_offset >= 0, "stack offset underflow");
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304
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107 addptr(rsp, wordSize * nof_words);
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0
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108 }
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109
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110 void dec_stack_after_call (int nof_words) {
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111 _rsp_offset -= nof_words;
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112 assert(_rsp_offset >= 0, "stack offset underflow");
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113 }
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114
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115 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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