hotspot/src/cpu/sparc/vm/c1_MacroAssembler_sparc.hpp
author zmajo
Tue, 12 Jan 2016 09:19:09 +0100
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permissions -rw-r--r--
8086053: Address inconsistencies regarding ZeroTLAB Summary: Add zero-initialization to C1 for fast TLAB refills; strenghten C2 conditions for skipping zero-initialization. Reviewed-by: kvn, thartmann
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/*
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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_SPARC_VM_C1_MACROASSEMBLER_SPARC_HPP
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#define CPU_SPARC_VM_C1_MACROASSEMBLER_SPARC_HPP
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  void pd_init() { /* nothing to do */ }
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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 base, Register index);
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  // locking/unlocking
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  void lock_object  (Register Rmark, Register Roop, Register Rbox, Register Rscratch, Label& slow_case);
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  void unlock_object(Register Rmark, Register Roop, Register Rbox,                    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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  void allocate_object(
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    Register obj,                      // result: pointer to object after successful allocation
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    Register t1,                       // temp register
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    Register t2,                       // temp register
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    Register t3,                       // temp register
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    int      hdr_size,                 // object header size in words
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    int      obj_size,                 // object size in words
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    Register klass,                    // object klass
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    Label&   slow_case                 // continuation point if fast allocation fails
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  );
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  enum {
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    max_array_allocation_length = 0x01000000 // sparc friendly value, requires sethi only
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  };
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  // allocation of arrays
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  void allocate_array(
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    Register obj,                      // result: pointer to array after successful allocation
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    Register len,                      // array length
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    Register t1,                       // temp register
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    Register t2,                       // temp register
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    Register t3,                       // temp register
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    int      hdr_size,                 // object header size in words
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    int      elt_size,                 // element size in bytes
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    Register klass,                    // object klass
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    Label&   slow_case                 // continuation point if fast allocation fails
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  );
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  // invalidates registers in this window
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  void invalidate_registers(bool iregisters, bool lregisters, bool oregisters,
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                            Register preserve1 = noreg, Register preserve2 = noreg);
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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_SPARC_VM_C1_MACROASSEMBLER_SPARC_HPP