1 /*
   2  * Copyright (c) 2009, 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 package org.graalvm.compiler.asm.sparc;
  26 
  27 import java.util.TreeMap;
  28 
  29 import org.graalvm.compiler.asm.Assembler.InstructionCounter;
  30 
  31 public class SPARCInstructionCounter implements InstructionCounter {
  32     // Use a treemap to keep the order in the output
  33     private static final TreeMap<String, SPARCInstructionMatch> INSTRUCTION_MATCHER = new TreeMap<>();
  34 
  35     static {
  36         // @formatter:off
  37         INSTRUCTION_MATCHER.put("nop", new SPARCInstructionMatch(0xFFFF_FFFF, 0x0100_0000));
  38         INSTRUCTION_MATCHER.put("st", new OP3LowBitsMatcher(0b11, 0x4, 0x5, 0x6, 0x7, 0xe, 0xf));
  39         INSTRUCTION_MATCHER.put("ld", new OP3LowBitsMatcher(0b11, 0x0, 0x1, 0x2, 0x3, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd));
  40         INSTRUCTION_MATCHER.put("all", new SPARCInstructionMatch(0x0, 0x0));
  41         // @formatter:on
  42     }
  43 
  44     private final SPARCAssembler asm;
  45 
  46     public SPARCInstructionCounter(SPARCAssembler asm) {
  47         super();
  48         this.asm = asm;
  49     }
  50 
  51     @Override
  52     public int[] countInstructions(String[] instructionTypes, int beginPc, int endPc) {
  53         SPARCInstructionMatch[] matchers = new SPARCInstructionMatch[instructionTypes.length];
  54         for (int i = 0; i < instructionTypes.length; i++) {
  55             String typeName = instructionTypes[i];
  56             matchers[i] = INSTRUCTION_MATCHER.get(typeName);
  57             if (matchers[i] == null) {
  58                 throw new IllegalArgumentException(String.format("Unknown instruction class %s, supported types are: %s", typeName, INSTRUCTION_MATCHER.keySet()));
  59             }
  60         }
  61         return countBetween(matchers, beginPc, endPc);
  62     }
  63 
  64     private int[] countBetween(SPARCInstructionMatch[] matchers, int startPc, int endPc) {
  65         int[] counts = new int[matchers.length];
  66         for (int p = startPc; p < endPc; p += 4) {
  67             int instr = asm.getInt(p);
  68             for (int i = 0; i < matchers.length; i++) {
  69                 SPARCInstructionMatch matcher = matchers[i];
  70                 if (matcher.matches(instr)) {
  71                     counts[i]++;
  72                 }
  73             }
  74         }
  75         return counts;
  76     }
  77 
  78     @Override
  79     public String[] getSupportedInstructionTypes() {
  80         return INSTRUCTION_MATCHER.keySet().toArray(new String[0]);
  81     }
  82 
  83     /**
  84      * Tests the lower 3 bits of the op3 field.
  85      */
  86     private static class OP3LowBitsMatcher extends SPARCInstructionMatch {
  87         private final int[] op3b03;
  88         private final int op;
  89 
  90         OP3LowBitsMatcher(int op, int... op3b03) {
  91             super(0, 0);
  92             this.op = op;
  93             this.op3b03 = op3b03;
  94         }
  95 
  96         @Override
  97         public boolean matches(int instruction) {
  98             if (instruction >>> 30 != op) {
  99                 return false;
 100             }
 101             int op3lo = (instruction >> 19) & ((1 << 4) - 1);
 102             for (int op3Part : op3b03) {
 103                 if (op3Part == op3lo) {
 104                     return true;
 105                 }
 106             }
 107             return false;
 108         }
 109     }
 110 
 111     private static class SPARCInstructionMatch {
 112         private final int mask;
 113         private final int[] patterns;
 114 
 115         SPARCInstructionMatch(int mask, int... patterns) {
 116             super();
 117             this.mask = mask;
 118             this.patterns = patterns;
 119         }
 120 
 121         public boolean matches(int instruction) {
 122             for (int pattern : patterns) {
 123                 if ((instruction & mask) == pattern) {
 124                     return true;
 125                 }
 126             }
 127             return false;
 128         }
 129     }
 130 }