001/*
002 * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.asm.sparc;
024
025import java.util.*;
026
027import com.oracle.graal.asm.Assembler.*;
028
029public class SPARCInstructionCounter implements InstructionCounter {
030    // Use a treemap to keep the order in the output
031    private static final TreeMap<String, SPARCInstructionMatch> INSTRUCTION_MATCHER = new TreeMap<>();
032    static {
033        // @formatter:off
034        INSTRUCTION_MATCHER.put("nop", new SPARCInstructionMatch(0xFFFF_FFFF, 0x0100_0000));
035        INSTRUCTION_MATCHER.put("st", new OP3LowBitsMatcher(0b11, 0x4, 0x5, 0x6, 0x7, 0xe, 0xf));
036        INSTRUCTION_MATCHER.put("ld", new OP3LowBitsMatcher(0b11, 0x0, 0x1, 0x2, 0x3, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd));
037        INSTRUCTION_MATCHER.put("all", new SPARCInstructionMatch(0x0, 0x0));
038        // @formatter:on
039    }
040    private final SPARCAssembler asm;
041
042    public SPARCInstructionCounter(SPARCAssembler asm) {
043        super();
044        this.asm = asm;
045    }
046
047    @Override
048    public int[] countInstructions(String[] instructionTypes, int beginPc, int endPc) {
049        SPARCInstructionMatch[] matchers = new SPARCInstructionMatch[instructionTypes.length];
050        for (int i = 0; i < instructionTypes.length; i++) {
051            String typeName = instructionTypes[i];
052            matchers[i] = INSTRUCTION_MATCHER.get(typeName);
053            if (matchers[i] == null) {
054                throw new IllegalArgumentException(String.format("Unknown instruction class %s, supported types are: %s", typeName, INSTRUCTION_MATCHER.keySet()));
055            }
056        }
057        return countBetween(matchers, beginPc, endPc);
058    }
059
060    private int[] countBetween(SPARCInstructionMatch[] matchers, int startPc, int endPc) {
061        int[] counts = new int[matchers.length];
062        for (int p = startPc; p < endPc; p += 4) {
063            int instr = asm.getInt(p);
064            for (int i = 0; i < matchers.length; i++) {
065                SPARCInstructionMatch matcher = matchers[i];
066                if (matcher.matches(instr)) {
067                    counts[i]++;
068                }
069            }
070        }
071        return counts;
072    }
073
074    @Override
075    public String[] getSupportedInstructionTypes() {
076        return INSTRUCTION_MATCHER.keySet().toArray(new String[0]);
077    }
078
079    /**
080     * Tests the lower 3 bits of the op3 field.
081     */
082    private static class OP3LowBitsMatcher extends SPARCInstructionMatch {
083        private final int[] op3b03;
084        private final int op;
085
086        public OP3LowBitsMatcher(int op, int... op3b03) {
087            super(0, 0);
088            this.op = op;
089            this.op3b03 = op3b03;
090        }
091
092        @Override
093        public boolean matches(int instruction) {
094            if (instruction >>> 30 != op) {
095                return false;
096            }
097            int op3lo = (instruction >> 19) & ((1 << 4) - 1);
098            for (int op3Part : op3b03) {
099                if (op3Part == op3lo) {
100                    return true;
101                }
102            }
103            return false;
104        }
105    }
106
107    private static class SPARCInstructionMatch {
108        private final int mask;
109        private final int[] patterns;
110
111        public SPARCInstructionMatch(int mask, int... patterns) {
112            super();
113            this.mask = mask;
114            this.patterns = patterns;
115        }
116
117        public boolean matches(int instruction) {
118            for (int pattern : patterns) {
119                if ((instruction & mask) == pattern) {
120                    return true;
121                }
122            }
123            return false;
124        }
125    }
126}