content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  public class Main {
  
    /// CHECK-START: int Main.round32(float) intrinsics_recognition (after)
    /// CHECK-DAG: <<Result:i\d+>> InvokeStaticOrDirect intrinsic:MathRoundFloat
    /// CHECK-DAG:                 Return [<<Result>>]
    private static int round32(float f) {
      return Math.round(f);
    }
  
    /// CHECK-START: long Main.round64(double) intrinsics_recognition (after)
    /// CHECK-DAG: <<Result:j\d+>> InvokeStaticOrDirect intrinsic:MathRoundDouble
    /// CHECK-DAG:                 Return [<<Result>>]
    private static long round64(double d) {
      return Math.round(d);
    }
  
    public static void main(String args[]) {
      // A few obvious numbers.
      expectEquals32(-2147483648, round32(Float.NEGATIVE_INFINITY));
      expectEquals32(-2, round32(-1.51f));
      expectEquals32(-1, round32(-1.2f));
      expectEquals32(-1, round32(-1.0f));
      expectEquals32(-1, round32(-0.51f));
      expectEquals32(0, round32(-0.2f));
      expectEquals32(0, round32(-0.0f));
      expectEquals32(0, round32(+0.0f));
      expectEquals32(0, round32(+0.2f));
      expectEquals32(1, round32(+0.5f));
      expectEquals32(1, round32(+1.0f));
      expectEquals32(1, round32(+1.2f));
      expectEquals32(2, round32(+1.5f));
      expectEquals32(2147483647, round32(Float.POSITIVE_INFINITY));
  
      // Some others.
      for (int i = -100; i <= 100; ++i) {
        expectEquals32(i - 1, round32((float) i - 0.51f));
        expectEquals32(i, round32((float) i));
        expectEquals32(i + 1, round32((float) i + 0.5f));
      }
      for (float f = -1.5f; f <= -1.499f; f = Math.nextAfter(f, Float.POSITIVE_INFINITY)) {
        expectEquals32(-1, round32(f));
      }
  
      // Some harder.
      float[] fvals = {
        -16777215.5f,
        -16777215.0f,
        -0.4999f,
        0.4999f,
        16777215.0f,
        16777215.5f
      };
      int[] ivals = {
        -16777216,
        -16777215,
        0,
        0,
        16777215,
        16777216
      };
      for (int i = 0; i < fvals.length; i++) {
        expectEquals32(ivals[i], round32(fvals[i]));
      }
  
      // A few NaN numbers.
      float[] fnans = {
        Float.intBitsToFloat(0x7f800001),
        Float.intBitsToFloat(0x7fa00000),
        Float.intBitsToFloat(0x7fc00000),
        Float.intBitsToFloat(0x7fffffff),
        Float.intBitsToFloat(0xff800001),
        Float.intBitsToFloat(0xffa00000),
        Float.intBitsToFloat(0xffc00000),
        Float.intBitsToFloat(0xffffffff)
      };
      for (int i = 0; i < fnans.length; i++) {
        expectEquals32(0, round32(fnans[i]));
      }
  
      // A few obvious numbers.
      expectEquals64(-9223372036854775808L, round64(Double.NEGATIVE_INFINITY));
      expectEquals64(-2L, round64(-1.51d));
      expectEquals64(-1L, round64(-1.2d));
      expectEquals64(-1L, round64(-1.0d));
      expectEquals64(-1L, round64(-0.51d));
      expectEquals64(0L, round64(-0.2d));
      expectEquals64(0L, round64(-0.0d));
      expectEquals64(0L, round64(+0.0d));
      expectEquals64(0L, round64(+0.2d));
      expectEquals64(1L, round64(+0.5d));
      expectEquals64(1L, round64(+1.0d));
      expectEquals64(1L, round64(+1.2d));
      expectEquals64(2L, round64(+1.5d));
      expectEquals64(9223372036854775807L, round64(Double.POSITIVE_INFINITY));
  
      // Some others.
      for (long l = -100; l <= 100; ++l) {
        expectEquals64(l - 1, round64((double) l - 0.51d));
        expectEquals64(l + 1, round64((double) l + 0.5d));
        expectEquals64(l + 1, round64((double) l + 0.5d));
      }
      for (double d = -1.5d; d <= -1.49999999999d; d = Math.nextAfter(d, Double.POSITIVE_INFINITY)) {
        expectEquals64(-1L, round64(d));
      }
  
      // Some harder.
      double[] dvals = {
        -9007199254740991.5d,
        -9007199254740991.0d,
        -0.49999999999999994d,
        0.49999999999999994d,
        9007199254740991.0d,
        9007199254740991.5d
      };
      long[] lvals = {
        -9007199254740992L,
        -9007199254740991L,
        0L,
        0L,
        9007199254740991L,
        9007199254740992L
      };
      for (int i = 0; i < dvals.length; i++) {
        expectEquals64(lvals[i], round64(dvals[i]));
      }
  
      // A few NaN numbers.
      double[] dnans = {
        Double.longBitsToDouble(0x7ff0000000000001L),
        Double.longBitsToDouble(0x7ff4000000000000L),
        Double.longBitsToDouble(0x7ff8000000000000L),
        Double.longBitsToDouble(0x7fffffffffffffffL),
        Double.longBitsToDouble(0xfff0000000000001L),
        Double.longBitsToDouble(0xfff4000000000000L),
        Double.longBitsToDouble(0xfff8000000000000L),
        Double.longBitsToDouble(0xffffffffffffffffL)
      };
      for (int i = 0; i < dnans.length; i++) {
        expectEquals64(0L, round64(dnans[i]));
      }
  
      System.out.println("passed");
    }
  
    private static void expectEquals32(int expected, int result) {
      if (expected != result) {
        throw new Error("Expected: " + expected + ", found: " + result);
      }
    }
  
    private static void expectEquals64(long expected, long result) {
      if (expected != result) {
        throw new Error("Expected: " + expected + ", found: " + result);
      }
    }
  }
  