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src/hotspot/cpu/sparc/relocInfo_sparc.hpp

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rev 48402 : 8193927: Optimize scanning code for oops.
Reviewed-by: simonis, mdoerr, aph
   1 /*
   2  * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef CPU_SPARC_VM_RELOCINFO_SPARC_HPP
  26 #define CPU_SPARC_VM_RELOCINFO_SPARC_HPP
  27 
  28   // machine-dependent parts of class relocInfo
  29  private:
  30   enum {
  31     // Since SPARC instructions are whole words,
  32     // the two low-order offset bits can always be discarded.
  33     offset_unit        =  4,
  34 
  35     // There is no need for format bits; the instructions are
  36     // sufficiently self-identifying.
  37     // Except narrow oops in 64-bits VM.
  38     format_width       =  1
  39   };
  40 





  41 
  42 //Reconciliation History
  43 // 1.3 97/10/15 15:38:36 relocInfo_i486.hpp
  44 // 1.4 97/12/08 16:01:06 relocInfo_i486.hpp
  45 // 1.5 98/01/23 01:34:55 relocInfo_i486.hpp
  46 // 1.6 98/02/27 15:44:53 relocInfo_i486.hpp
  47 // 1.6 98/03/12 14:47:13 relocInfo_i486.hpp
  48 // 1.8 99/06/22 16:37:50 relocInfo_i486.hpp
  49 // 1.9 99/07/16 11:12:11 relocInfo_i486.hpp
  50 //End
  51 
  52 #endif // CPU_SPARC_VM_RELOCINFO_SPARC_HPP
   1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef CPU_SPARC_VM_RELOCINFO_SPARC_HPP
  26 #define CPU_SPARC_VM_RELOCINFO_SPARC_HPP
  27 
  28   // machine-dependent parts of class relocInfo
  29  private:
  30   enum {
  31     // Since SPARC instructions are whole words,
  32     // the two low-order offset bits can always be discarded.
  33     offset_unit        =  4,
  34 
  35     // There is no need for format bits; the instructions are
  36     // sufficiently self-identifying.
  37     // Except narrow oops in 64-bits VM.
  38     format_width       =  1
  39   };
  40 
  41  public:
  42 
  43   // This platform has no oops in the code that are not also
  44   // listed in the oop section.
  45   static bool mustIterateImmediateOopsInCode() { return false; }
  46 
  47 //Reconciliation History
  48 // 1.3 97/10/15 15:38:36 relocInfo_i486.hpp
  49 // 1.4 97/12/08 16:01:06 relocInfo_i486.hpp
  50 // 1.5 98/01/23 01:34:55 relocInfo_i486.hpp
  51 // 1.6 98/02/27 15:44:53 relocInfo_i486.hpp
  52 // 1.6 98/03/12 14:47:13 relocInfo_i486.hpp
  53 // 1.8 99/06/22 16:37:50 relocInfo_i486.hpp
  54 // 1.9 99/07/16 11:12:11 relocInfo_i486.hpp
  55 //End
  56 
  57 #endif // CPU_SPARC_VM_RELOCINFO_SPARC_HPP
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