c1_MacroAssembler_x86.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// C1_MacroAssembler contains high-level macros for C1 26 27 private: 28 int _rsp_offset; // track rsp changes 29 // initialization 30 void pd_init() { _rsp_offset = 0; } 31 32 public: 33 void try_allocate( 34 Register obj, // result: pointer to object after successful allocation 35 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 36 int con_size_in_bytes, // object size in bytes if known at compile time 37 Register t1, // temp register 38 Register t2, // temp register 39 Label& slow_case // continuation point if fast allocation fails 40 ); 41 42 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2); 43 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1); 44 45 // locking 46 // hdr : must be rax, contents destroyed 47 // obj : must point to the object to lock, contents preserved 48 // disp_hdr: must point to the displaced header location, contents preserved 49 // scratch : scratch register, contents destroyed 50 // returns code offset at which to add null check debug information 51 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case); 52 53 // unlocking 54 // hdr : contents destroyed 55 // obj : must point to the object to lock, contents preserved 56 // disp_hdr: must be eax & must point to the displaced header location, contents destroyed 57 void unlock_object(Register swap, Register obj, Register lock, Label& slow_case); 58 59 void initialize_object( 60 Register obj, // result: pointer to object after successful allocation 61 Register klass, // object klass 62 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 63 int con_size_in_bytes, // object size in bytes if known at compile time 64 Register t1, // temp register 65 Register t2 // temp register 66 ); 67 68 // allocation of fixed-size objects 69 // (can also be used to allocate fixed-size arrays, by setting 70 // hdr_size correctly and storing the array length afterwards) 71 // obj : must be rax, will contain pointer to allocated object 72 // t1, t2 : scratch registers - contents destroyed 73 // header_size: size of object header in words 74 // object_size: total size of object in words 75 // slow_case : exit to slow case implementation if fast allocation fails 76 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case); 77 78 enum { 79 max_array_allocation_length = 0x00FFFFFF 80 }; 81 82 // allocation of arrays 83 // obj : must be rax, will contain pointer to allocated object 84 // len : array length in number of elements 85 // t : scratch register - contents destroyed 86 // header_size: size of object header in words 87 // f : element scale factor 88 // slow_case : exit to slow case implementation if fast allocation fails 89 void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case); 90 91 int rsp_offset() const { return _rsp_offset; } 92 void set_rsp_offset(int n) { _rsp_offset = n; } 93 94 // Note: NEVER push values directly, but only through following push_xxx functions; 95 // This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset) 96 97 void push_jint (jint i) { _rsp_offset++; push(i); } 98 void push_oop (jobject o) { _rsp_offset++; pushoop(o); } 99 // Seems to always be in wordSize 100 void push_addr (Address a) { _rsp_offset++; pushptr(a); } 101 void push_reg (Register r) { _rsp_offset++; push(r); } 102 void pop_reg (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); } 103 104 void dec_stack (int nof_words) { 105 _rsp_offset -= nof_words; 106 assert(_rsp_offset >= 0, "stack offset underflow"); 107 addptr(rsp, wordSize * nof_words); 108 } 109 110 void dec_stack_after_call (int nof_words) { 111 _rsp_offset -= nof_words; 112 assert(_rsp_offset >= 0, "stack offset underflow"); 113 } 114 115 void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN; 116