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/*
* Copyright (C) 2017 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.
*/
/**
* Tests for SAD (sum of absolute differences).
*/
public class SadByte {
/// CHECK-START: int SadByte.sad1(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:i\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: int SadByte.sad1(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:i\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static int sad1(byte x, byte y) {
return x >= y ? x - y : y - x;
}
/// CHECK-START: int SadByte.sad2(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:i\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: int SadByte.sad2(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:i\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static int sad2(byte x, byte y) {
int diff = x - y;
if (diff < 0) diff = -diff;
return diff;
}
/// CHECK-START: int SadByte.sad3(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:i\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: int SadByte.sad3(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:i\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static int sad3(byte x, byte y) {
int diff = x - y;
return diff >= 0 ? diff : -diff;
}
/// CHECK-START: int SadByte.sad3Alt(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:i\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: int SadByte.sad3Alt(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:i\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static int sad3Alt(byte x, byte y) {
int diff = x - y;
return 0 <= diff ? diff : -diff;
}
/// CHECK-START: long SadByte.sadL1(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:j\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: long SadByte.sadL1(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:j\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static long sadL1(byte x, byte y) {
long xl = x;
long yl = y;
return xl >= yl ? xl - yl : yl - xl;
}
/// CHECK-START: long SadByte.sadL2(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:j\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: long SadByte.sadL2(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:j\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static long sadL2(byte x, byte y) {
long diff = x - y;
if (diff < 0L) diff = -diff;
return diff;
}
/// CHECK-START: long SadByte.sadL3(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:j\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: long SadByte.sadL3(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:j\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static long sadL3(byte x, byte y) {
long diff = x - y;
return diff >= 0L ? diff : -diff;
}
/// CHECK-START: long SadByte.sadL3Alt(byte, byte) instruction_simplifier$after_gvn (before)
/// CHECK-DAG: <<Select:j\d+>> Select
/// CHECK-DAG: Return [<<Select>>]
//
/// CHECK-START: long SadByte.sadL3Alt(byte, byte) instruction_simplifier$after_gvn (after)
/// CHECK-DAG: <<Intrin:j\d+>> Abs
/// CHECK-DAG: Return [<<Intrin>>]
static long sadL3Alt(byte x, byte y) {
long diff = x - y;
return 0L <= diff ? diff : -diff;
}
public static void main() {
// Use cross-values to test all cases.
int n = 256;
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
byte x = (byte) i;
byte y = (byte) j;
int e = Math.abs(x - y);
expectEquals(e, sad1(x, y));
expectEquals(e, sad2(x, y));
expectEquals(e, sad3(x, y));
expectEquals(e, sad3Alt(x, y));
expectEquals(e, sadL2(x, y));
expectEquals(e, sadL3(x, y));
expectEquals(e, sadL3Alt(x, y));
}
}
System.out.println("SadByte passed");
}
private static void expectEquals(int expected, int result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
private static void expectEquals(long expected, long result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
}