| /* |
| * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |
| #define CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |
| |
| // C1_MacroAssembler contains high-level macros for C1 |
| |
| private: |
| int _rsp_offset; // track rsp changes |
| // initialization |
| void pd_init() { _rsp_offset = 0; } |
| |
| public: |
| void try_allocate( |
| Register obj, // result: pointer to object after successful allocation |
| Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise |
| int con_size_in_bytes, // object size in bytes if known at compile time |
| Register t1, // temp register |
| Register t2, // temp register |
| Label& slow_case // continuation point if fast allocation fails |
| ); |
| |
| void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2); |
| void initialize_body(Register obj, Register len_in_bytes, int hdr_size_in_bytes, Register t1); |
| |
| // locking |
| // hdr : must be rax, contents destroyed |
| // obj : must point to the object to lock, contents preserved |
| // disp_hdr: must point to the displaced header location, contents preserved |
| // scratch : scratch register, contents destroyed |
| // returns code offset at which to add null check debug information |
| int lock_object (Register swap, Register obj, Register disp_hdr, Register scratch, Label& slow_case); |
| |
| // unlocking |
| // hdr : contents destroyed |
| // obj : must point to the object to lock, contents preserved |
| // disp_hdr: must be eax & must point to the displaced header location, contents destroyed |
| void unlock_object(Register swap, Register obj, Register lock, Label& slow_case); |
| |
| void initialize_object( |
| Register obj, // result: pointer to object after successful allocation |
| Register klass, // object klass |
| Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise |
| int con_size_in_bytes, // object size in bytes if known at compile time |
| Register t1, // temp register |
| Register t2, // temp register |
| bool is_tlab_allocated // the object was allocated in a TLAB; relevant for the implementation of ZeroTLAB |
| ); |
| |
| // allocation of fixed-size objects |
| // (can also be used to allocate fixed-size arrays, by setting |
| // hdr_size correctly and storing the array length afterwards) |
| // obj : must be rax, will contain pointer to allocated object |
| // t1, t2 : scratch registers - contents destroyed |
| // header_size: size of object header in words |
| // object_size: total size of object in words |
| // slow_case : exit to slow case implementation if fast allocation fails |
| void allocate_object(Register obj, Register t1, Register t2, int header_size, int object_size, Register klass, Label& slow_case); |
| |
| enum { |
| max_array_allocation_length = 0x00FFFFFF |
| }; |
| |
| // allocation of arrays |
| // obj : must be rax, will contain pointer to allocated object |
| // len : array length in number of elements |
| // t : scratch register - contents destroyed |
| // header_size: size of object header in words |
| // f : element scale factor |
| // slow_case : exit to slow case implementation if fast allocation fails |
| void allocate_array(Register obj, Register len, Register t, Register t2, int header_size, Address::ScaleFactor f, Register klass, Label& slow_case); |
| |
| int rsp_offset() const { return _rsp_offset; } |
| void set_rsp_offset(int n) { _rsp_offset = n; } |
| |
| // Note: NEVER push values directly, but only through following push_xxx functions; |
| // This helps us to track the rsp changes compared to the entry rsp (->_rsp_offset) |
| |
| void push_jint (jint i) { _rsp_offset++; push(i); } |
| void push_oop (jobject o) { _rsp_offset++; pushoop(o); } |
| // Seems to always be in wordSize |
| void push_addr (Address a) { _rsp_offset++; pushptr(a); } |
| void push_reg (Register r) { _rsp_offset++; push(r); } |
| void pop_reg (Register r) { _rsp_offset--; pop(r); assert(_rsp_offset >= 0, "stack offset underflow"); } |
| |
| void dec_stack (int nof_words) { |
| _rsp_offset -= nof_words; |
| assert(_rsp_offset >= 0, "stack offset underflow"); |
| addptr(rsp, wordSize * nof_words); |
| } |
| |
| void dec_stack_after_call (int nof_words) { |
| _rsp_offset -= nof_words; |
| assert(_rsp_offset >= 0, "stack offset underflow"); |
| } |
| |
| void invalidate_registers(bool inv_rax, bool inv_rbx, bool inv_rcx, bool inv_rdx, bool inv_rsi, bool inv_rdi) PRODUCT_RETURN; |
| |
| // This platform only uses signal-based null checks. The Label is not needed. |
| void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); } |
| |
| #endif // CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP |