1 /*
   2  * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2012, 2016 SAP SE. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef CPU_PPC_GLOBALDEFINITIONS_PPC_HPP
  27 #define CPU_PPC_GLOBALDEFINITIONS_PPC_HPP
  28 
  29 #ifdef CC_INTERP
  30 #error "CC_INTERP is no longer supported. Removed in change 8145117."
  31 #endif
  32 
  33 // Size of PPC Instructions
  34 const int BytesPerInstWord = 4;
  35 
  36 const int StackAlignmentInBytes = 16;
  37 
  38 // Indicates whether the C calling conventions require that
  39 // 32-bit integer argument values are extended to 64 bits.
  40 const bool CCallingConventionRequiresIntsAsLongs = true;
  41 
  42 #define SUPPORTS_NATIVE_CX8
  43 
  44 // PPC64 is not CPU_MULTI_COPY_ATOMIC
  45 
  46 // The expected size in bytes of a cache line, used to pad data structures.
  47 #define DEFAULT_CACHE_LINE_SIZE 128
  48 
  49 #if defined(COMPILER2) && (defined(AIX) || defined(LINUX))
  50 // Include Transactional Memory lock eliding optimization
  51 #define INCLUDE_RTM_OPT 1
  52 #endif
  53 
  54 #define SUPPORT_RESERVED_STACK_AREA
  55 
  56 #define THREAD_LOCAL_POLL
  57 // If UseSIGTRAP is active, we only use the poll bit and no polling page.
  58 // Otherwise, we fall back to usage of the polling page in nmethods.
  59 // Define the condition to use this -XX flag.
  60 #define USE_POLL_BIT_ONLY UseSIGTRAP
  61 
  62 #endif // CPU_PPC_GLOBALDEFINITIONS_PPC_HPP