/*
* 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 halving-add idiomatic vectorization.
*
* Alternative version expressed with logical shift right
* in the higher precision (has no impact on idiom).
*/
public class Main {
private static final int N = 256;
private static final int M = N * N + 15;
static byte[] sB1 = new byte[M];
static byte[] sB2 = new byte[M];
static byte[] sBo = new byte[M];
/// CHECK-START: void Main.halving_add_signed(byte[], byte[], byte[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<Get1>>,<<Get2>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:b\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-ARM64: void Main.halving_add_signed(byte[], byte[], byte[]) loop_optimization (after)
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:false rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void halving_add_signed(byte[] b1, byte[] b2, byte[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (byte) ((b1[i] + b2[i]) >>> 1);
}
}
/// CHECK-START: void Main.halving_add_unsigned(byte[], byte[], byte[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<I255:i\d+>> IntConstant 255 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And1:i\d+>> And [<<Get1>>,<<I255>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And2:i\d+>> And [<<Get2>>,<<I255>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<And1>>,<<And2>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:b\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-ARM64: void Main.halving_add_unsigned(byte[], byte[], byte[]) loop_optimization (after)
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:true rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void halving_add_unsigned(byte[] b1, byte[] b2, byte[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (byte) (((b1[i] & 0xff) + (b2[i] & 0xff)) >>> 1);
}
}
/// CHECK-START: void Main.rounding_halving_add_signed(byte[], byte[], byte[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add1:i\d+>> Add [<<Get1>>,<<Get2>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add2:i\d+>> Add [<<Add1>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add2>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:b\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-ARM64: void Main.rounding_halving_add_signed(byte[], byte[], byte[]) loop_optimization (after)
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:false rounded:true loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void rounding_halving_add_signed(byte[] b1, byte[] b2, byte[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (byte) ((b1[i] + b2[i] + 1) >>> 1);
}
}
/// CHECK-START: void Main.rounding_halving_add_unsigned(byte[], byte[], byte[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<I255:i\d+>> IntConstant 255 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And1:i\d+>> And [<<Get1>>,<<I255>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And2:i\d+>> And [<<Get2>>,<<I255>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add1:i\d+>> Add [<<And1>>,<<And2>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add2:i\d+>> Add [<<Add1>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add2>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:b\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-ARM64: void Main.rounding_halving_add_unsigned(byte[], byte[], byte[]) loop_optimization (after)
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:true rounded:true loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void rounding_halving_add_unsigned(byte[] b1, byte[] b2, byte[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (byte) (((b1[i] & 0xff) + (b2[i] & 0xff) + 1) >>> 1);
}
}
/// CHECK-START: void Main.halving_add_signed_constant(byte[], byte[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<I127:i\d+>> IntConstant 127 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<Get>>,<<I127>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:b\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-ARM64: void Main.halving_add_signed_constant(byte[], byte[]) loop_optimization (after)
/// CHECK-DAG: <<I127:i\d+>> IntConstant 127 loop:none
/// CHECK-DAG: <<Repl:d\d+>> VecReplicateScalar [<<I127>>] loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get>>,<<Repl>>] unsigned:false rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void halving_add_signed_constant(byte[] b1, byte[] bo) {
int min_length = Math.min(bo.length, b1.length);
for (int i = 0; i < min_length; i++) {
bo[i] = (byte) ((b1[i] + 0x7f) >>> 1);
}
}
/// CHECK-START: void Main.halving_add_unsigned_constant(byte[], byte[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<I255:i\d+>> IntConstant 255 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:b\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And:i\d+>> And [<<Get>>,<<I255>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<And>>,<<I255>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:b\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-ARM64: void Main.halving_add_unsigned_constant(byte[], byte[]) loop_optimization (after)
/// CHECK-DAG: <<I255:i\d+>> IntConstant 255 loop:none
/// CHECK-DAG: <<Repl:d\d+>> VecReplicateScalar [<<I255>>] loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get>>,<<Repl>>] unsigned:true rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void halving_add_unsigned_constant(byte[] b1, byte[] bo) {
int min_length = Math.min(bo.length, b1.length);
for (int i = 0; i < min_length; i++) {
bo[i] = (byte) (((b1[i] & 0xff) + 0xff) >>> 1);
}
}
public static void main(String[] args) {
// Initialize cross-values to test all cases, and also
// set up some extra values to exercise the cleanup loop.
int k = 0;
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
sB1[k] = (byte) i;
sB2[k] = (byte) j;
k++;
}
}
for (int i = 0; i < 15; i++) {
sB1[k] = (byte) i;
sB2[k] = 100;
k++;
}
expectEquals(k, M);
// Test halving add idioms. Note that the expected result is computed
// with the arithmetic >> to demonstrate the computed narrower result
// does not depend on the wider >> or >>>.
halving_add_signed(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
byte e = (byte) ((sB1[i] + sB2[i]) >> 1);
expectEquals(e, sBo[i]);
}
halving_add_unsigned(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
byte e = (byte) (((sB1[i] & 0xff) + (sB2[i] & 0xff)) >> 1);
expectEquals(e, sBo[i]);
}
rounding_halving_add_signed(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
byte e = (byte) ((sB1[i] + sB2[i] + 1) >> 1);
expectEquals(e, sBo[i]);
}
rounding_halving_add_unsigned(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
byte e = (byte) (((sB1[i] & 0xff) + (sB2[i] & 0xff) + 1) >> 1);
expectEquals(e, sBo[i]);
}
halving_add_signed_constant(sB1, sBo);
for (int i = 0; i < M; i++) {
byte e = (byte) ((sB1[i] + 0x7f) >> 1);
expectEquals(e, sBo[i]);
}
halving_add_unsigned_constant(sB1, sBo);
for (int i = 0; i < M; i++) {
byte e = (byte) (((sB1[i] & 0xff) + 0xff) >> 1);
expectEquals(e, sBo[i]);
}
System.out.println("passed");
}
private static void expectEquals(int expected, int result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
}