1 /* 2 * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, 2021, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_AARCH64_C1_MACROASSEMBLER_AARCH64_HPP 27 #define CPU_AARCH64_C1_MACROASSEMBLER_AARCH64_HPP 28 29 using MacroAssembler::build_frame; 30 using MacroAssembler::null_check; 31 32 // C1_MacroAssembler contains high-level macros for C1 33 34 private: 35 int _rsp_offset; // track rsp changes 36 // initialization 37 void pd_init() { _rsp_offset = 0; } 38 39 40 public: 41 void try_allocate( 42 Register obj, // result: pointer to object after successful allocation 43 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 44 int con_size_in_bytes, // object size in bytes if known at compile time 45 Register t1, // temp register 46 Register t2, // temp register 47 Label& slow_case // continuation point if fast allocation fails 48 ); 49 50 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2); 51 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1, Register t2); 52 53 void float_cmp(bool is_float, int unordered_result, 54 FloatRegister f0, FloatRegister f1, 55 Register result); 56 57 // locking 58 // hdr : must be r0, contents destroyed 59 // obj : must point to the object to lock, contents preserved 60 // disp_hdr: must point to the displaced header location, contents preserved 61 // temp : temporary register, must not be rscratch1 or rscratch2 62 // returns code offset at which to add null check debug information 63 int lock_object (Register swap, Register obj, Register disp_hdr, Register temp, Label& slow_case); 64 65 // unlocking 66 // hdr : contents destroyed 67 // obj : must point to the object to lock, contents preserved 68 // disp_hdr: must be r0 & must point to the displaced header location, contents destroyed 69 // temp : temporary register, must not be rscratch1 or rscratch2 70 void unlock_object(Register swap, Register obj, Register lock, Register temp, Label& slow_case); 71 72 void initialize_object( 73 Register obj, // result: pointer to object after successful allocation 74 Register klass, // object klass 75 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 76 int con_size_in_bytes, // object size in bytes if known at compile time 77 Register t1, // temp register 78 Register t2, // temp register 79 bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB 80 ); 81 82 // allocation of fixed-size objects 83 // (can also be used to allocate fixed-size arrays, by setting 84 // hdr_size correctly and storing the array length afterwards) 85 // obj : will contain pointer to allocated object 86 // t1, t2 : scratch registers - contents destroyed 87 // header_size: size of object header in words 88 // object_size: total size of object in words 89 // slow_case : exit to slow case implementation if fast allocation fails 90 void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case); 91 92 enum { 93 max_array_allocation_length = 0x00FFFFFF 94 }; 95 96 // allocation of arrays 97 // obj : will contain pointer to allocated object 98 // len : array length in number of elements 99 // t : scratch register - contents destroyed 100 // header_size: size of object header in words 101 // f : element scale factor 102 // slow_case : exit to slow case implementation if fast allocation fails 103 void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, int f, Register klass, Label& slow_case); 104 105 int rsp_offset() const { return _rsp_offset; } 106 void set_rsp_offset(int n) { _rsp_offset = n; } 107 108 void invalidate_registers(bool inv_r0, bool inv_r19, bool inv_r2, bool inv_r3, bool inv_r4, bool inv_r5) PRODUCT_RETURN; 109 110 // This platform only uses signal-based null checks. The Label is not needed. 111 void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); } 112 113 void load_parameter(int offset_in_words, Register reg); 114 115 #endif // CPU_AARCH64_C1_MACROASSEMBLER_AARCH64_HPP --- EOF ---