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