1 /*
   2  * Copyright (c) 2009, 2015, 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 package org.graalvm.compiler.asm.sparc;
  24 
  25 import java.util.TreeMap;
  26 
  27 import org.graalvm.compiler.asm.Assembler.InstructionCounter;
  28 
  29 public class SPARCInstructionCounter implements InstructionCounter {
  30     // Use a treemap to keep the order in the output
  31     private static final TreeMap<String, SPARCInstructionMatch> INSTRUCTION_MATCHER = new TreeMap<>();
  32 
  33     static {
  34         // @formatter:off
  35         INSTRUCTION_MATCHER.put("nop", new SPARCInstructionMatch(0xFFFF_FFFF, 0x0100_0000));
  36         INSTRUCTION_MATCHER.put("st", new OP3LowBitsMatcher(0b11, 0x4, 0x5, 0x6, 0x7, 0xe, 0xf));
  37         INSTRUCTION_MATCHER.put("ld", new OP3LowBitsMatcher(0b11, 0x0, 0x1, 0x2, 0x3, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd));
  38         INSTRUCTION_MATCHER.put("all", new SPARCInstructionMatch(0x0, 0x0));
  39         // @formatter:on
  40     }
  41 
  42     private final SPARCAssembler asm;
  43 
  44     public SPARCInstructionCounter(SPARCAssembler asm) {
  45         super();
  46         this.asm = asm;
  47     }
  48 
  49     @Override
  50     public int[] countInstructions(String[] instructionTypes, int beginPc, int endPc) {
  51         SPARCInstructionMatch[] matchers = new SPARCInstructionMatch[instructionTypes.length];
  52         for (int i = 0; i < instructionTypes.length; i++) {
  53             String typeName = instructionTypes[i];
  54             matchers[i] = INSTRUCTION_MATCHER.get(typeName);
  55             if (matchers[i] == null) {
  56                 throw new IllegalArgumentException(String.format("Unknown instruction class %s, supported types are: %s", typeName, INSTRUCTION_MATCHER.keySet()));
  57             }
  58         }
  59         return countBetween(matchers, beginPc, endPc);
  60     }
  61 
  62     private int[] countBetween(SPARCInstructionMatch[] matchers, int startPc, int endPc) {
  63         int[] counts = new int[matchers.length];
  64         for (int p = startPc; p < endPc; p += 4) {
  65             int instr = asm.getInt(p);
  66             for (int i = 0; i < matchers.length; i++) {
  67                 SPARCInstructionMatch matcher = matchers[i];
  68                 if (matcher.matches(instr)) {
  69                     counts[i]++;
  70                 }
  71             }
  72         }
  73         return counts;
  74     }
  75 
  76     @Override
  77     public String[] getSupportedInstructionTypes() {
  78         return INSTRUCTION_MATCHER.keySet().toArray(new String[0]);
  79     }
  80 
  81     /**
  82      * Tests the lower 3 bits of the op3 field.
  83      */
  84     private static class OP3LowBitsMatcher extends SPARCInstructionMatch {
  85         private final int[] op3b03;
  86         private final int op;
  87 
  88         OP3LowBitsMatcher(int op, int... op3b03) {
  89             super(0, 0);
  90             this.op = op;
  91             this.op3b03 = op3b03;
  92         }
  93 
  94         @Override
  95         public boolean matches(int instruction) {
  96             if (instruction >>> 30 != op) {
  97                 return false;
  98             }
  99             int op3lo = (instruction >> 19) & ((1 << 4) - 1);
 100             for (int op3Part : op3b03) {
 101                 if (op3Part == op3lo) {
 102                     return true;
 103                 }
 104             }
 105             return false;
 106         }
 107     }
 108 
 109     private static class SPARCInstructionMatch {
 110         private final int mask;
 111         private final int[] patterns;
 112 
 113         SPARCInstructionMatch(int mask, int... patterns) {
 114             super();
 115             this.mask = mask;
 116             this.patterns = patterns;
 117         }
 118 
 119         public boolean matches(int instruction) {
 120             for (int pattern : patterns) {
 121                 if ((instruction & mask) == pattern) {
 122                     return true;
 123                 }
 124             }
 125             return false;
 126         }
 127     }
 128 }