1 /*
   2  * Copyright (c) 2014, 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 package sha.predicate;
  25 
  26 import com.oracle.java.testlibrary.Platform;
  27 import com.oracle.java.testlibrary.cli.predicate.AndPredicate;
  28 import com.oracle.java.testlibrary.cli.predicate.CPUSpecificPredicate;
  29 import com.oracle.java.testlibrary.cli.predicate.OrPredicate;
  30 import sun.hotspot.WhiteBox;
  31 
  32 import java.util.function.BooleanSupplier;
  33 
  34 /**
  35  * Helper class aimed to provide predicates on availability of SHA-related
  36  * CPU instructions and intrinsics.
  37  */
  38 public class IntrinsicPredicates {
  39     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  40     private static final long TIERED_MAX_LEVEL = 4L;
  41     /**
  42      * Boolean supplier that check if any method could be compiled by C2.
  43      * Method potentially could be compiled by C2 if Server VM is used and
  44      * either tiered compilation is disabled or TIERED_MAX_LEVEL tier is
  45      * reachable.
  46      *
  47      * Please don't place this definition after SHA*_INTRINSICS_AVAILABLE
  48      * definitions. Otherwise its value will be {@code null} at the time when
  49      * all dependent fields will be initialized.
  50      */
  51     private static final BooleanSupplier COMPILABLE_BY_C2 = () -> {
  52         boolean isTiered = IntrinsicPredicates.WHITE_BOX.getBooleanVMFlag(
  53                 "TieredCompilation");
  54         long tieredMaxLevel = IntrinsicPredicates.WHITE_BOX.getIntxVMFlag(
  55                 "TieredStopAtLevel");
  56         boolean maxLevelIsReachable = (tieredMaxLevel
  57                 == IntrinsicPredicates.TIERED_MAX_LEVEL);
  58         return Platform.isServer() && (!isTiered || maxLevelIsReachable);
  59     };
  60 
  61     public static final BooleanSupplier SHA1_INSTRUCTION_AVAILABLE
  62             = new CPUSpecificPredicate("sparc.*", new String[] { "sha1" },
  63                     null);
  64 
  65     public static final BooleanSupplier SHA256_INSTRUCTION_AVAILABLE
  66             = new CPUSpecificPredicate("sparc.*", new String[] { "sha256" },
  67                     null);
  68 
  69     public static final BooleanSupplier SHA512_INSTRUCTION_AVAILABLE
  70             = new CPUSpecificPredicate("sparc.*", new String[] { "sha512" },
  71                     null);
  72 
  73     public static final BooleanSupplier ANY_SHA_INSTRUCTION_AVAILABLE
  74             = new OrPredicate(IntrinsicPredicates.SHA1_INSTRUCTION_AVAILABLE,
  75                     new OrPredicate(
  76                             IntrinsicPredicates.SHA256_INSTRUCTION_AVAILABLE,
  77                             IntrinsicPredicates.SHA512_INSTRUCTION_AVAILABLE));
  78 
  79     public static final BooleanSupplier SHA1_INTRINSICS_AVAILABLE
  80             = new AndPredicate(new AndPredicate(
  81                     IntrinsicPredicates.SHA1_INSTRUCTION_AVAILABLE,
  82                     IntrinsicPredicates.COMPILABLE_BY_C2),
  83                 IntrinsicPredicates.booleanOptionValue("UseSHA1Intrinsics"));
  84 
  85     public static final BooleanSupplier SHA256_INTRINSICS_AVAILABLE
  86             = new AndPredicate(new AndPredicate(
  87                     IntrinsicPredicates.SHA256_INSTRUCTION_AVAILABLE,
  88                     IntrinsicPredicates.COMPILABLE_BY_C2),
  89                 IntrinsicPredicates.booleanOptionValue("UseSHA256Intrinsics"));
  90 
  91     public static final BooleanSupplier SHA512_INTRINSICS_AVAILABLE
  92             = new AndPredicate(new AndPredicate(
  93                     IntrinsicPredicates.SHA512_INSTRUCTION_AVAILABLE,
  94                     IntrinsicPredicates.COMPILABLE_BY_C2),
  95                 IntrinsicPredicates.booleanOptionValue("UseSHA512Intrinsics"));
  96 
  97     private static BooleanSupplier booleanOptionValue(String option) {
  98         return () -> IntrinsicPredicates.WHITE_BOX.getBooleanVMFlag(option);
  99     }
 100 
 101     private IntrinsicPredicates() {
 102     }
 103 }