1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 public class Main { 18 19 /// CHECK-START: int Main.hi32(int) intrinsics_recognition (after) 20 /// CHECK-DAG: <<Result:i\d+>> InvokeStaticOrDirect intrinsic:IntegerHighestOneBit 21 /// CHECK-DAG: Return [<<Result>>] 22 private static int hi32(int x) { 23 return Integer.highestOneBit(x); 24 } 25 26 /// CHECK-START: int Main.lo32(int) intrinsics_recognition (after) 27 /// CHECK-DAG: <<Result:i\d+>> InvokeStaticOrDirect intrinsic:IntegerLowestOneBit 28 /// CHECK-DAG: Return [<<Result>>] 29 private static int lo32(int x) { 30 return Integer.lowestOneBit(x); 31 } 32 33 /// CHECK-START: long Main.hi64(long) intrinsics_recognition (after) 34 /// CHECK-DAG: <<Result:j\d+>> InvokeStaticOrDirect intrinsic:LongHighestOneBit 35 /// CHECK-DAG: Return [<<Result>>] 36 private static long hi64(long x) { 37 return Long.highestOneBit(x); 38 } 39 40 /// CHECK-START: long Main.lo64(long) intrinsics_recognition (after) 41 /// CHECK-DAG: <<Result:j\d+>> InvokeStaticOrDirect intrinsic:LongLowestOneBit 42 /// CHECK-DAG: Return [<<Result>>] 43 private static long lo64(long x) { 44 return Long.lowestOneBit(x); 45 } 46 47 public static void main(String args[]) { 48 // Hidden zeros. 49 int[] xi = new int[32]; 50 long[] xj = new long[64]; 51 52 expectEquals32(0x00000000, hi32(0x00000000)); 53 expectEquals32(0x00000000, lo32(0x00000000)); 54 expectEquals32(0x00010000, hi32(0x00010000)); 55 expectEquals32(0x00010000, lo32(0x00010000)); 56 expectEquals32(0x00800000, hi32(0x00FF0000)); 57 expectEquals32(0x00010000, lo32(0x00FF0000)); 58 expectEquals32(0x80000000, hi32(0xFFFFFFFF)); 59 expectEquals32(0x00000001, lo32(0xFFFFFFFF)); 60 61 for (int i = 0; i < 32; i++) { 62 expectEquals32(0, hi32(xi[i])); 63 expectEquals32(0, lo32(xi[i])); 64 expectEquals32(1 << i, hi32(1 << i)); 65 expectEquals32(1 << i, lo32(1 << i)); 66 int expected = i < 29 ? 0x8 << i : 0x80000000; 67 expectEquals32(expected, hi32(0xF << i)); 68 expectEquals32(0x1 << i, lo32(0xF << i)); 69 } 70 71 expectEquals64(0x0000000000000000L, hi64(0x0000000000000000L)); 72 expectEquals64(0x0000000000000000L, lo64(0x0000000000000000L)); 73 expectEquals64(0x0000000100000000L, hi64(0x0000000100000000L)); 74 expectEquals64(0x0000000100000000L, lo64(0x0000000100000000L)); 75 expectEquals64(0x0000008000000000L, hi64(0x000000FF00000000L)); 76 expectEquals64(0x0000000100000000L, lo64(0x000000FF00000000L)); 77 expectEquals64(0x8000000000000000L, hi64(0xFFFFFFFFFFFFFFFFL)); 78 expectEquals64(0x0000000000000001L, lo64(0xFFFFFFFFFFFFFFFFL)); 79 80 for (int i = 0; i < 64; i++) { 81 expectEquals64(0L, hi64(xj[i])); 82 expectEquals64(0L, lo64(xj[i])); 83 expectEquals64(1L << i, hi64(1L << i)); 84 expectEquals64(1L << i, lo64(1L << i)); 85 long expected = i < 61 ? 0x8L << i : 0x8000000000000000L; 86 expectEquals64(expected, hi64(0xFL << i)); 87 expectEquals64(0x1L << i, lo64(0xFL << i)); 88 } 89 90 System.out.println("passed"); 91 } 92 93 private static void expectEquals32(int expected, int result) { 94 if (expected != result) { 95 throw new Error("Expected: " + expected + ", found: " + result); 96 } 97 } 98 private static void expectEquals64(long expected, long result) { 99 if (expected != result) { 100 throw new Error("Expected: " + expected + ", found: " + result); 101 } 102 } 103 } 104
