1 /* 2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved. 4 * Copyright (c) 2015-2018, Azul Systems, Inc. All rights reserved. 5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 6 * 7 * This code is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License version 2 only, as 9 * published by the Free Software Foundation. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 * 25 */ 26 27 #ifndef CPU_AARCH32_VM_C1_MACROASSEMBLER_AARCH32_HPP 28 #define CPU_AARCH32_VM_C1_MACROASSEMBLER_AARCH32_HPP 29 30 //TODO: XXX: merge 31 //using MacroAssembler::build_frame; 32 using MacroAssembler::null_check; 33 34 // C1_MacroAssembler contains high-level macros for C1 35 36 private: 37 int _rsp_offset; // track rsp changes 38 // initialization 39 void pd_init() { _rsp_offset = 0; } 40 41 public: 42 void try_allocate( 43 Register obj, // result: pointer to object after successful allocation 44 Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise 45 int con_size_in_bytes, // object size in bytes if known at compile time 46 Register t1, // temp register 47 Register t2, // temp register 48 Label& slow_case // continuation point if fast allocation fails 49 ); 50 51 void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2); 52 void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1); 53 54 void float_cmp(bool is_float, int unordered_result, 55 FloatRegister f0, FloatRegister f1, 56 Register result); 57 58 // locking 59 // hdr : must be r0, contents destroyed 60 // obj : must point to the object to lock, contents preserved 61 // disp_hdr: must point to the displaced header location, contents preserved 62 // scratch : scratch register, contents destroyed 63 // returns code offset at which to add null check debug information 64 int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case); 65 66 // unlocking 67 // hdr : contents destroyed 68 // obj : must point to the object to lock, contents preserved 69 // disp_hdr: must be r0 & must point to the displaced header location, contents destroyed 70 void unlock_object(Register swap, Register obj, Register lock, 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_r2, bool inv_r3) PRODUCT_RETURN; 109 110 void patchable_load(Register reg, address addr); 111 // This platform only uses signal-based null checks. The Label is not needed. 112 void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); } 113 114 void load_parameter(int offset_in_words, Register reg); 115 116 #endif // CPU_AARCH32_VM_C1_MACROASSEMBLER_AARCH32_HPP