/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Tests for SAD (sum of absolute differences).
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*/
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public class Main {
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/// CHECK-START: int Main.sad1(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:i\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: int Main.sad1(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:i\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static int sad1(short x, short y) {
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return x >= y ? x - y : y - x;
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}
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/// CHECK-START: int Main.sad2(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:i\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: int Main.sad2(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:i\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static int sad2(short x, short y) {
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int diff = x - y;
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if (diff < 0) diff = -diff;
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return diff;
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}
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/// CHECK-START: int Main.sad3(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:i\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: int Main.sad3(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:i\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static int sad3(short x, short y) {
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int diff = x - y;
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return diff >= 0 ? diff : -diff;
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}
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/// CHECK-START: int Main.sad3Alt(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:i\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: int Main.sad3Alt(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:i\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static int sad3Alt(short x, short y) {
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int diff = x - y;
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return 0 <= diff ? diff : -diff;
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}
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/// CHECK-START: long Main.sadL1(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:j\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: long Main.sadL1(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:j\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static long sadL1(short x, short y) {
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long xl = x;
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long yl = y;
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return xl >= yl ? xl - yl : yl - xl;
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}
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/// CHECK-START: long Main.sadL2(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:j\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: long Main.sadL2(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:j\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static long sadL2(short x, short y) {
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long diff = x - y;
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if (diff < 0L) diff = -diff;
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return diff;
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}
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/// CHECK-START: long Main.sadL3(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:j\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: long Main.sadL3(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:j\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static long sadL3(short x, short y) {
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long diff = x - y;
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return diff >= 0L ? diff : -diff;
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}
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/// CHECK-START: long Main.sadL3Alt(short, short) instruction_simplifier$after_gvn (before)
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/// CHECK-DAG: <<Select:j\d+>> Select
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/// CHECK-DAG: Return [<<Select>>]
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//
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/// CHECK-START: long Main.sadL3Alt(short, short) instruction_simplifier$after_gvn (after)
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/// CHECK-DAG: <<Intrin:j\d+>> Abs
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/// CHECK-DAG: Return [<<Intrin>>]
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static long sadL3Alt(short x, short y) {
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long diff = x - y;
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return 0L <= diff ? diff : -diff;
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}
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public static void main(String[] args) {
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// Use cross-values to test all cases.
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short[] interesting = {
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(short) 0x0000, (short) 0x0001, (short) 0x007f,
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(short) 0x0080, (short) 0x0081, (short) 0x00ff,
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(short) 0x0100, (short) 0x0101, (short) 0x017f,
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(short) 0x0180, (short) 0x0181, (short) 0x01ff,
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(short) 0x7f00, (short) 0x7f01, (short) 0x7f7f,
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(short) 0x7f80, (short) 0x7f81, (short) 0x7fff,
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(short) 0x8000, (short) 0x8001, (short) 0x807f,
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(short) 0x8080, (short) 0x8081, (short) 0x80ff,
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(short) 0x8100, (short) 0x8101, (short) 0x817f,
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(short) 0x8180, (short) 0x8181, (short) 0x81ff,
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(short) 0xff00, (short) 0xff01, (short) 0xff7f,
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(short) 0xff80, (short) 0xff81, (short) 0xffff
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};
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for (int i = 0; i < interesting.length; i++) {
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for (int j = 0; j < interesting.length; j++) {
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short x = interesting[i];
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short y = interesting[j];
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int e = Math.abs(x - y);
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expectEquals(e, sad1(x, y));
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expectEquals(e, sad2(x, y));
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expectEquals(e, sad3(x, y));
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expectEquals(e, sad3Alt(x, y));
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expectEquals(e, sadL1(x, y));
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expectEquals(e, sadL2(x, y));
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expectEquals(e, sadL3(x, y));
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expectEquals(e, sadL3Alt(x, y));
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}
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}
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System.out.println("passed");
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}
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private static void expectEquals(int expected, int result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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private static void expectEquals(long expected, long result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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}
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