/*
* 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 = 64 * 1024;
private static final int M = N + 31;
static char[] sB1 = new char[M];
static char[] sB2 = new char[M];
static char[] sBo = new char[M];
/// CHECK-START: void Main.halving_add_unsigned(char[], char[], char[]) 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:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:c\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:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-{ARM,ARM64,MIPS64}: void Main.halving_add_unsigned(char[], char[], char[]) loop_optimization (after)
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] packed_type:Uint16 rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},{{i\d+}},<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void halving_add_unsigned(char[] b1, char[] b2, char[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (char) ((b1[i] + b2[i]) >>> 1);
}
}
/// CHECK-START: void Main.halving_add_also_unsigned(char[], char[], char[]) instruction_simplifier (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<IMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And1:i\d+>> And [<<Get1>>,<<IMAX>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And2:i\d+>> And [<<IMAX>>,<<Get2>>] 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:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},{{i\d+}},<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START: void Main.halving_add_also_unsigned(char[], char[], char[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<IMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:c\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:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-{ARM,ARM64,MIPS64}: void Main.halving_add_also_unsigned(char[], char[], char[]) loop_optimization (after)
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] packed_type:Uint16 rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},{{i\d+}},<<HAdd>>] loop:<<Loop>> outer_loop:none
//
// Note: HAnd has no impact (already a zero extension).
//
private static void halving_add_also_unsigned(char[] b1, char[] b2, char[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (char) (((b1[i] & 0xffff) + (b2[i] & 0xffff)) >>> 1);
}
}
/// CHECK-START: void Main.rounding_halving_add_unsigned(char[], char[], char[]) 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:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:c\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:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-{ARM,ARM64,MIPS64}: void Main.rounding_halving_add_unsigned(char[], char[], char[]) loop_optimization (after)
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] packed_type:Uint16 rounded:true loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},{{i\d+}},<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void rounding_halving_add_unsigned(char[] b1, char[] b2, char[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (char) ((b1[i] + b2[i] + 1) >>> 1);
}
}
/// CHECK-START: void Main.rounding_halving_add_also_unsigned(char[], char[], char[]) instruction_simplifier (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<IMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And1:i\d+>> And [<<Get1>>,<<IMAX>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And2:i\d+>> And [<<IMAX>>,<<Get2>>] 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:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},{{i\d+}},<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START: void Main.rounding_halving_add_also_unsigned(char[], char[], char[]) 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:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Get2:c\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:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-{ARM,ARM64,MIPS64}: void Main.rounding_halving_add_also_unsigned(char[], char[], char[]) loop_optimization (after)
/// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] packed_type:Uint16 rounded:true loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},{{i\d+}},<<HAdd>>] loop:<<Loop>> outer_loop:none
//
// Note: HAnd has no impact (already a zero extension).
//
private static void rounding_halving_add_also_unsigned(char[] b1, char[] b2, char[] bo) {
int min_length = Math.min(bo.length, Math.min(b1.length, b2.length));
for (int i = 0; i < min_length; i++) {
bo[i] = (char) (((b1[i] & 0xffff) + (b2[i] & 0xffff) + 1) >>> 1);
}
}
/// CHECK-START: void Main.halving_add_unsigned_constant(char[], char[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<Get>>,<<UMAX>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-{ARM,ARM64,MIPS64}: void Main.halving_add_unsigned_constant(char[], char[]) loop_optimization (after)
/// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Repl:d\d+>> VecReplicateScalar [<<UMAX>>] loop:none
/// CHECK-DAG: <<Get:d\d+>> VecLoad loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get>>,<<Repl>>] packed_type:Uint16 rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},{{i\d+}},<<HAdd>>] loop:<<Loop>> outer_loop:none
private static void halving_add_unsigned_constant(char[] b1, char[] bo) {
int min_length = Math.min(bo.length, b1.length);
for (int i = 0; i < min_length; i++) {
bo[i] = (char) ((b1[i] + 0xffff) >>> 1);
}
}
/// CHECK-START: void Main.halving_add_also_unsigned_constant(char[], char[]) instruction_simplifier (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<And:i\d+>> And [<<Get>>,<<UMAX>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<And>>,<<UMAX>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},{{i\d+}},<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START: void Main.halving_add_also_unsigned_constant(char[], char[]) loop_optimization (before)
/// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none
/// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<Get:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Add:i\d+>> Add [<<Get>>,<<UMAX>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<UShr:i\d+>> UShr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<UShr>>] loop:<<Loop>> outer_loop:none
/// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none
//
/// CHECK-START-{ARM,ARM64,MIPS64}: void Main.halving_add_also_unsigned_constant(char[], char[]) loop_optimization (after)
/// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none
/// CHECK-DAG: <<Repl:d\d+>> VecReplicateScalar [<<UMAX>>] loop:none
/// CHECK-DAG: <<Get:d\d+>> VecLoad loop:<<Loop:B\d+>> outer_loop:none
/// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get>>,<<Repl>>] packed_type:Uint16 rounded:false loop:<<Loop>> outer_loop:none
/// CHECK-DAG: VecStore [{{l\d+}},{{i\d+}},<<HAdd>>] loop:<<Loop>> outer_loop:none
//
// Note: HAnd has no impact (already a zero extension).
//
private static void halving_add_also_unsigned_constant(char[] b1, char[] bo) {
int min_length = Math.min(bo.length, b1.length);
for (int i = 0; i < min_length; i++) {
bo[i] = (char) (((b1[i] & 0xffff) + 0xffff) >>> 1);
}
}
public static void main(String[] args) {
// Some interesting values.
char[] interesting = {
(char) 0x0000,
(char) 0x0001,
(char) 0x0002,
(char) 0x1234,
(char) 0x8000,
(char) 0x8001,
(char) 0x7fff,
(char) 0xffff
};
// Initialize cross-values to test all cases, and also
// set up some extra values to exercise the cleanup loop.
for (int i = 0; i < M; i++) {
sB1[i] = (char) i;
sB2[i] = interesting[i & 7];
}
// 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_unsigned(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
char e = (char) ((sB1[i] + sB2[i]) >> 1);
expectEquals(e, sBo[i]);
}
halving_add_also_unsigned(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
char e = (char) ((sB1[i] + sB2[i]) >> 1);
expectEquals(e, sBo[i]);
}
rounding_halving_add_unsigned(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
char e = (char) ((sB1[i] + sB2[i] + 1) >> 1);
expectEquals(e, sBo[i]);
}
rounding_halving_add_also_unsigned(sB1, sB2, sBo);
for (int i = 0; i < M; i++) {
char e = (char) ((sB1[i] + sB2[i] + 1) >> 1);
expectEquals(e, sBo[i]);
}
halving_add_unsigned_constant(sB1, sBo);
for (int i = 0; i < M; i++) {
char e = (char) ((sB1[i] + 0xffff) >> 1);
expectEquals(e, sBo[i]);
}
halving_add_also_unsigned_constant(sB1, sBo);
for (int i = 0; i < M; i++) {
char e = (char) ((sB1[i] + 0xffff) >> 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);
}
}
}