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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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 *
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package org.openjdk.bench.vm.compiler.x86;

import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;

import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(value = 2, jvmArgs = {"-XX:LoopUnrollLimit=1"})
@Warmup(iterations = 4, time = 2, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 4, time = 2, timeUnit = TimeUnit.SECONDS)
@State(Scope.Thread)
public class LeaInstruction {
    static final int ITERATION = 1000;

    int x, y;

    @Benchmark
    public void IS_D_int(Blackhole bh) {
        int x = this.x;
        for (int i = 0; i < ITERATION; i++) {
            x = x * 4 + 10;
        }
        bh.consume(x);
    }

    @Benchmark
    public void B_I_D_int(Blackhole bh) {
        int x = this.x, y = this.y;
        for (int i = 0; i < ITERATION; i++) {
            x = x + y + 10;
            y = x + y + 20;
        }
        bh.consume(x);
        bh.consume(y);
    }

    @Benchmark
    public void B_IS_int(Blackhole bh) {
        int x = this.x, y = this.y;
        for (int i = 0; i < ITERATION; i++) {
            x = x + y * 4;
            y = x + y * 8;
        }
        bh.consume(x);
        bh.consume(y);
    }

    @Benchmark
    public void B_IS_D_int(Blackhole bh) {
        int x = this.x, y = this.y;
        for (int i = 0; i < ITERATION; i++) {
            x = x + y * 4 + 10;
            y = x + y * 8 + 20;
        }
        bh.consume(x);
        bh.consume(y);
    }

    @Benchmark
    public void IS_D_long(Blackhole bh) {
        long x = this.x;
        for (int i = 0; i < ITERATION; i++) {
            x = x * 4 + 10;
        }
        bh.consume(x);
    }

    @Benchmark
    public void B_I_D_long(Blackhole bh) {
        long x = this.x, y = this.y;
        for (int i = 0; i < ITERATION; i++) {
            x = x + y + 10;
            y = x + y + 20;
        }
        bh.consume(x);
        bh.consume(y);
    }

    @Benchmark
    public void B_IS_long(Blackhole bh) {
        long x = this.x, y = this.y;
        for (int i = 0; i < ITERATION; i++) {
            x = x + y * 4;
            y = x + y * 8;
        }
        bh.consume(x);
        bh.consume(y);
    }

    @Benchmark
    public void B_IS_D_long(Blackhole bh) {
        long x = this.x, y = this.y;
        for (int i = 0; i < ITERATION; i++) {
            x = x + y * 4 + 10;
            y = x + y * 8 + 20;
        }
        bh.consume(x);
        bh.consume(y);
    }
}