/*
* 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) builder (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) builder (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(-0.5000001f));
expectEquals32(0, round32(-0.5f));
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));
// Near minint.
expectEquals32(-2147483648, round32(Math.nextAfter(-2147483648.0f, Float.NEGATIVE_INFINITY)));
expectEquals32(-2147483648, round32(-2147483648.0f));
expectEquals32(-2147483520, round32(Math.nextAfter(-2147483648.0f, Float.POSITIVE_INFINITY)));
// Near maxint.
expectEquals32(2147483520, round32(Math.nextAfter(2147483648.0f, Float.NEGATIVE_INFINITY)));
expectEquals32(2147483647, round32(2147483648.0f));
expectEquals32(2147483647, round32(Math.nextAfter(2147483648.0f, 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 - 0.5f));
expectEquals32(i, round32((float) i));
expectEquals32(i + 1, round32((float) i + 0.5f));
expectEquals32(i + 1, round32((float) i + 0.51f));
}
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,
-0.49999998f,
-0.4999999701976776123046875f,
0.4999999701976776123046875f,
0.49999998f,
16777215.0f,
16777215.5f
};
int[] ivals = {
-16777216,
-16777215,
0,
0,
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(-0.5000001f));
expectEquals64(0L, round64(-0.5d));
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));
// Near minlong.
expectEquals64(-9223372036854775808L,
round64(Math.nextAfter(-9223372036854775808.0, Double.NEGATIVE_INFINITY)));
expectEquals64(-9223372036854775808L, round64(-9223372036854775808.0));
expectEquals64(-9223372036854774784L,
round64(Math.nextAfter(-9223372036854775809.0, Double.POSITIVE_INFINITY)));
// Near maxlong.
expectEquals64(9223372036854774784L,
round64(Math.nextAfter(9223372036854775808.0, Double.NEGATIVE_INFINITY)));
expectEquals64(9223372036854775807L, round64(9223372036854775808.0));
expectEquals64(9223372036854775807L,
round64(Math.nextAfter(9223372036854775808.0, Double.POSITIVE_INFINITY)));
// Some others.
for (long l = -100; l <= 100; ++l) {
expectEquals64(l - 1, round64((double) l - 0.51d));
expectEquals64(l, round64((double) l - 0.5d));
expectEquals64(l, round64((double) l));
expectEquals64(l + 1, round64((double) l + 0.5d));
expectEquals64(l + 1, round64((double) l + 0.51d));
}
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,
-0.49999999999999997d,
-0.49999999999999994d,
0.49999999999999994d,
0.49999999999999997d,
9007199254740991.0d,
9007199254740991.5d
};
long[] lvals = {
-9007199254740992L,
-9007199254740991L,
0L,
0L,
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);
}
}
}