Mercurial > hg > truffle
view src/cpu/x86/vm/c1_MacroAssembler_x86.hpp @ 2131:856ecff79cf7
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author | dcubed |
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date | Thu, 13 Jan 2011 08:32:15 -0800 |
parents | f95d63e2154a |
children | b648304ba4ff |
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/* * Copyright (c) 1999, 2010, 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 ); // 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; #endif // CPU_X86_VM_C1_MACROASSEMBLER_X86_HPP