1 /* 2 * Copyright (C) 2017 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 /** 18 * Tests for halving-add idiomatic vectorization. 19 */ 20 public class Main { 21 22 private static final int N = 64 * 1024; 23 private static final int M = N + 31; 24 25 static char[] sB1 = new char[M]; 26 static char[] sB2 = new char[M]; 27 static char[] sBo = new char[M]; 28 29 /// CHECK-START: void Main.halving_add_unsigned(char[], char[], char[]) loop_optimization (before) 30 /// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none 31 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 32 /// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 33 /// CHECK-DAG: <<Get2:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 34 /// CHECK-DAG: <<Add:i\d+>> Add [<<Get1>>,<<Get2>>] loop:<<Loop>> outer_loop:none 35 /// CHECK-DAG: <<Shr:i\d+>> Shr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none 36 /// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<Shr>>] loop:<<Loop>> outer_loop:none 37 /// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none 38 // 39 /// CHECK-START-ARM64: void Main.halving_add_unsigned(char[], char[], char[]) loop_optimization (after) 40 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 41 /// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 42 /// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 43 /// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:true rounded:false loop:<<Loop>> outer_loop:none 44 /// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none halving_add_unsigned(char[] b1, char[] b2, char[] bo)45 private static void halving_add_unsigned(char[] b1, char[] b2, char[] bo) { 46 int min_length = Math.min(bo.length, Math.min(b1.length, b2.length)); 47 for (int i = 0; i < min_length; i++) { 48 bo[i] = (char) ((b1[i] + b2[i]) >> 1); 49 } 50 } 51 52 /// CHECK-START: void Main.halving_add_also_unsigned(char[], char[], char[]) loop_optimization (before) 53 /// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none 54 /// CHECK-DAG: <<IMAX:i\d+>> IntConstant 65535 loop:none 55 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 56 /// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 57 /// CHECK-DAG: <<Get2:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 58 /// CHECK-DAG: <<And1:i\d+>> And [<<Get1>>,<<IMAX>>] loop:<<Loop>> outer_loop:none 59 /// CHECK-DAG: <<And2:i\d+>> And [<<Get2>>,<<IMAX>>] loop:<<Loop>> outer_loop:none 60 /// CHECK-DAG: <<Add:i\d+>> Add [<<And1>>,<<And2>>] loop:<<Loop>> outer_loop:none 61 /// CHECK-DAG: <<Shr:i\d+>> Shr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none 62 /// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<Shr>>] loop:<<Loop>> outer_loop:none 63 /// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none 64 // 65 /// CHECK-START-ARM64: void Main.halving_add_also_unsigned(char[], char[], char[]) loop_optimization (after) 66 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 67 /// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 68 /// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 69 /// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:true rounded:false loop:<<Loop>> outer_loop:none 70 /// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none 71 // 72 // Note: HAnd has no impact (already a zero extension). 73 // halving_add_also_unsigned(char[] b1, char[] b2, char[] bo)74 private static void halving_add_also_unsigned(char[] b1, char[] b2, char[] bo) { 75 int min_length = Math.min(bo.length, Math.min(b1.length, b2.length)); 76 for (int i = 0; i < min_length; i++) { 77 bo[i] = (char) (((b1[i] & 0xffff) + (b2[i] & 0xffff)) >> 1); 78 } 79 } 80 81 /// CHECK-START: void Main.rounding_halving_add_unsigned(char[], char[], char[]) loop_optimization (before) 82 /// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none 83 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 84 /// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 85 /// CHECK-DAG: <<Get2:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 86 /// CHECK-DAG: <<Add1:i\d+>> Add [<<Get1>>,<<Get2>>] loop:<<Loop>> outer_loop:none 87 /// CHECK-DAG: <<Add2:i\d+>> Add [<<Add1>>,<<I1>>] loop:<<Loop>> outer_loop:none 88 /// CHECK-DAG: <<Shr:i\d+>> Shr [<<Add2>>,<<I1>>] loop:<<Loop>> outer_loop:none 89 /// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<Shr>>] loop:<<Loop>> outer_loop:none 90 /// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none 91 // 92 /// CHECK-START-ARM64: void Main.rounding_halving_add_unsigned(char[], char[], char[]) loop_optimization (after) 93 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 94 /// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 95 /// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 96 /// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:true rounded:true loop:<<Loop>> outer_loop:none 97 /// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none rounding_halving_add_unsigned(char[] b1, char[] b2, char[] bo)98 private static void rounding_halving_add_unsigned(char[] b1, char[] b2, char[] bo) { 99 int min_length = Math.min(bo.length, Math.min(b1.length, b2.length)); 100 for (int i = 0; i < min_length; i++) { 101 bo[i] = (char) ((b1[i] + b2[i] + 1) >> 1); 102 } 103 } 104 105 /// CHECK-START: void Main.rounding_halving_add_also_unsigned(char[], char[], char[]) loop_optimization (before) 106 /// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none 107 /// CHECK-DAG: <<IMAX:i\d+>> IntConstant 65535 loop:none 108 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 109 /// CHECK-DAG: <<Get1:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 110 /// CHECK-DAG: <<Get2:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 111 /// CHECK-DAG: <<And1:i\d+>> And [<<Get1>>,<<IMAX>>] loop:<<Loop>> outer_loop:none 112 /// CHECK-DAG: <<And2:i\d+>> And [<<Get2>>,<<IMAX>>] loop:<<Loop>> outer_loop:none 113 /// CHECK-DAG: <<Add1:i\d+>> Add [<<And1>>,<<And2>>] loop:<<Loop>> outer_loop:none 114 /// CHECK-DAG: <<Add2:i\d+>> Add [<<Add1>>,<<I1>>] loop:<<Loop>> outer_loop:none 115 /// CHECK-DAG: <<Shr:i\d+>> Shr [<<Add2>>,<<I1>>] loop:<<Loop>> outer_loop:none 116 /// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<Shr>>] loop:<<Loop>> outer_loop:none 117 /// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none 118 // 119 /// CHECK-START-ARM64: void Main.rounding_halving_add_also_unsigned(char[], char[], char[]) loop_optimization (after) 120 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 121 /// CHECK-DAG: <<Get1:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 122 /// CHECK-DAG: <<Get2:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 123 /// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get1>>,<<Get2>>] unsigned:true rounded:true loop:<<Loop>> outer_loop:none 124 /// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none 125 // 126 // Note: HAnd has no impact (already a zero extension). 127 // rounding_halving_add_also_unsigned(char[] b1, char[] b2, char[] bo)128 private static void rounding_halving_add_also_unsigned(char[] b1, char[] b2, char[] bo) { 129 int min_length = Math.min(bo.length, Math.min(b1.length, b2.length)); 130 for (int i = 0; i < min_length; i++) { 131 bo[i] = (char) (((b1[i] & 0xffff) + (b2[i] & 0xffff) + 1) >> 1); 132 } 133 } 134 135 /// CHECK-START: void Main.halving_add_unsigned_constant(char[], char[]) loop_optimization (before) 136 /// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none 137 /// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none 138 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 139 /// CHECK-DAG: <<Get:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 140 /// CHECK-DAG: <<Add:i\d+>> Add [<<Get>>,<<UMAX>>] loop:<<Loop>> outer_loop:none 141 /// CHECK-DAG: <<Shr:i\d+>> Shr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none 142 /// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<Shr>>] loop:<<Loop>> outer_loop:none 143 /// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none 144 // 145 /// CHECK-START-ARM64: void Main.halving_add_unsigned_constant(char[], char[]) loop_optimization (after) 146 /// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none 147 /// CHECK-DAG: <<Repl:d\d+>> VecReplicateScalar [<<UMAX>>] loop:none 148 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 149 /// CHECK-DAG: <<Get:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 150 /// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get>>,<<Repl>>] unsigned:true rounded:false loop:<<Loop>> outer_loop:none 151 /// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none halving_add_unsigned_constant(char[] b1, char[] bo)152 private static void halving_add_unsigned_constant(char[] b1, char[] bo) { 153 int min_length = Math.min(bo.length, b1.length); 154 for (int i = 0; i < min_length; i++) { 155 bo[i] = (char) ((b1[i] + 0xffff) >> 1); 156 } 157 } 158 159 /// CHECK-START: void Main.halving_add_also_unsigned_constant(char[], char[]) loop_optimization (before) 160 /// CHECK-DAG: <<I1:i\d+>> IntConstant 1 loop:none 161 /// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none 162 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 163 /// CHECK-DAG: <<Get:c\d+>> ArrayGet loop:<<Loop>> outer_loop:none 164 /// CHECK-DAG: <<And:i\d+>> And [<<Get>>,<<UMAX>>] loop:<<Loop>> outer_loop:none 165 /// CHECK-DAG: <<Add:i\d+>> Add [<<And>>,<<UMAX>>] loop:<<Loop>> outer_loop:none 166 /// CHECK-DAG: <<Shr:i\d+>> Shr [<<Add>>,<<I1>>] loop:<<Loop>> outer_loop:none 167 /// CHECK-DAG: <<Cnv:c\d+>> TypeConversion [<<Shr>>] loop:<<Loop>> outer_loop:none 168 /// CHECK-DAG: ArraySet [{{l\d+}},<<Phi>>,<<Cnv>>] loop:<<Loop>> outer_loop:none 169 // 170 /// CHECK-START-ARM64: void Main.halving_add_also_unsigned_constant(char[], char[]) loop_optimization (after) 171 /// CHECK-DAG: <<UMAX:i\d+>> IntConstant 65535 loop:none 172 /// CHECK-DAG: <<Repl:d\d+>> VecReplicateScalar [<<UMAX>>] loop:none 173 /// CHECK-DAG: <<Phi:i\d+>> Phi loop:<<Loop:B\d+>> outer_loop:none 174 /// CHECK-DAG: <<Get:d\d+>> VecLoad loop:<<Loop>> outer_loop:none 175 /// CHECK-DAG: <<HAdd:d\d+>> VecHalvingAdd [<<Get>>,<<Repl>>] unsigned:true rounded:false loop:<<Loop>> outer_loop:none 176 /// CHECK-DAG: VecStore [{{l\d+}},<<Phi>>,<<HAdd>>] loop:<<Loop>> outer_loop:none 177 // 178 // Note: HAnd has no impact (already a zero extension). 179 // halving_add_also_unsigned_constant(char[] b1, char[] bo)180 private static void halving_add_also_unsigned_constant(char[] b1, char[] bo) { 181 int min_length = Math.min(bo.length, b1.length); 182 for (int i = 0; i < min_length; i++) { 183 bo[i] = (char) (((b1[i] & 0xffff) + 0xffff) >> 1); 184 } 185 } 186 main(String[] args)187 public static void main(String[] args) { 188 // Some interesting values. 189 char[] interesting = { 190 (char) 0x0000, 191 (char) 0x0001, 192 (char) 0x0002, 193 (char) 0x1234, 194 (char) 0x8000, 195 (char) 0x8001, 196 (char) 0x7fff, 197 (char) 0xffff 198 }; 199 // Initialize cross-values to test all cases, and also 200 // set up some extra values to exercise the cleanup loop. 201 for (int i = 0; i < M; i++) { 202 sB1[i] = (char) i; 203 sB2[i] = interesting[i & 7]; 204 } 205 206 // Test halving add idioms. 207 halving_add_unsigned(sB1, sB2, sBo); 208 for (int i = 0; i < M; i++) { 209 char e = (char) ((sB1[i] + sB2[i]) >> 1); 210 expectEquals(e, sBo[i]); 211 } 212 halving_add_also_unsigned(sB1, sB2, sBo); 213 for (int i = 0; i < M; i++) { 214 char e = (char) ((sB1[i] + sB2[i]) >> 1); 215 expectEquals(e, sBo[i]); 216 } 217 rounding_halving_add_unsigned(sB1, sB2, sBo); 218 for (int i = 0; i < M; i++) { 219 char e = (char) ((sB1[i] + sB2[i] + 1) >> 1); 220 expectEquals(e, sBo[i]); 221 } 222 rounding_halving_add_also_unsigned(sB1, sB2, sBo); 223 for (int i = 0; i < M; i++) { 224 char e = (char) ((sB1[i] + sB2[i] + 1) >> 1); 225 expectEquals(e, sBo[i]); 226 } 227 halving_add_unsigned_constant(sB1, sBo); 228 for (int i = 0; i < M; i++) { 229 char e = (char) ((sB1[i] + 0xffff) >> 1); 230 expectEquals(e, sBo[i]); 231 } 232 halving_add_also_unsigned_constant(sB1, sBo); 233 for (int i = 0; i < M; i++) { 234 char e = (char) ((sB1[i] + 0xffff) >> 1); 235 expectEquals(e, sBo[i]); 236 } 237 238 System.out.println("passed"); 239 } 240 expectEquals(int expected, int result)241 private static void expectEquals(int expected, int result) { 242 if (expected != result) { 243 throw new Error("Expected: " + expected + ", found: " + result); 244 } 245 } 246 } 247