| /* |
| * Copyright (C) 2018 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. |
| */ |
| |
| public class DivTest { |
| |
| public static <T extends Number> void expectEquals(T expected, T result) { |
| if (!expected.equals(result)) { |
| throw new Error("Expected: " + expected + ", found: " + result); |
| } |
| } |
| |
| public static void main() { |
| divInt(); |
| divLong(); |
| } |
| |
| private static void divInt() { |
| expectEquals(0, $noinline$IntDivBy2(0)); |
| expectEquals(0, $noinline$IntDivBy2(1)); |
| expectEquals(0, $noinline$IntDivBy2(-1)); |
| expectEquals(1, $noinline$IntDivBy2(2)); |
| expectEquals(-1, $noinline$IntDivBy2(-2)); |
| expectEquals(1, $noinline$IntDivBy2(3)); |
| expectEquals(-1, $noinline$IntDivBy2(-3)); |
| expectEquals(3, $noinline$IntDivBy2(7)); |
| expectEquals(-3, $noinline$IntDivBy2(-7)); |
| expectEquals(4, $noinline$IntDivBy2(8)); |
| expectEquals(-4, $noinline$IntDivBy2(-8)); |
| expectEquals(7, $noinline$IntDivBy2(0x0f)); |
| expectEquals(0x007f, $noinline$IntDivBy2(0x00ff)); |
| expectEquals(0x07ff, $noinline$IntDivBy2(0x0fff)); |
| expectEquals(0x007fff, $noinline$IntDivBy2(0x00ffff)); |
| expectEquals(0x3fffffff, $noinline$IntDivBy2(Integer.MAX_VALUE)); |
| expectEquals(0xc0000000, $noinline$IntDivBy2(Integer.MIN_VALUE)); |
| |
| expectEquals(0, $noinline$IntDivByMinus2(0)); |
| expectEquals(0, $noinline$IntDivByMinus2(1)); |
| expectEquals(0, $noinline$IntDivByMinus2(-1)); |
| expectEquals(-1, $noinline$IntDivByMinus2(2)); |
| expectEquals(1, $noinline$IntDivByMinus2(-2)); |
| expectEquals(-1, $noinline$IntDivByMinus2(3)); |
| expectEquals(1, $noinline$IntDivByMinus2(-3)); |
| expectEquals(-3, $noinline$IntDivByMinus2(7)); |
| expectEquals(3, $noinline$IntDivByMinus2(-7)); |
| expectEquals(-4, $noinline$IntDivByMinus2(8)); |
| expectEquals(4, $noinline$IntDivByMinus2(-8)); |
| expectEquals(-7, $noinline$IntDivByMinus2(0x0f)); |
| expectEquals(0xffffff81, $noinline$IntDivByMinus2(0x00ff)); |
| expectEquals(0xfffff801, $noinline$IntDivByMinus2(0x0fff)); |
| expectEquals(0xffff8001, $noinline$IntDivByMinus2(0x00ffff)); |
| expectEquals(0xc0000001, $noinline$IntDivByMinus2(Integer.MAX_VALUE)); |
| expectEquals(0x40000000, $noinline$IntDivByMinus2(Integer.MIN_VALUE)); |
| |
| expectEquals(0, $noinline$IntDivBy16(0)); |
| expectEquals(1, $noinline$IntDivBy16(16)); |
| expectEquals(-1, $noinline$IntDivBy16(-16)); |
| expectEquals(2, $noinline$IntDivBy16(33)); |
| expectEquals(0x000f, $noinline$IntDivBy16(0x00ff)); |
| expectEquals(0x00ff, $noinline$IntDivBy16(0x0fff)); |
| expectEquals(0x000fff, $noinline$IntDivBy16(0x00ffff)); |
| expectEquals(0x07ffffff, $noinline$IntDivBy16(Integer.MAX_VALUE)); |
| expectEquals(0xf8000000, $noinline$IntDivBy16(Integer.MIN_VALUE)); |
| |
| expectEquals(0, $noinline$IntDivByMinus16(0)); |
| expectEquals(-1, $noinline$IntDivByMinus16(16)); |
| expectEquals(1, $noinline$IntDivByMinus16(-16)); |
| expectEquals(-2, $noinline$IntDivByMinus16(33)); |
| expectEquals(0xfffffff1, $noinline$IntDivByMinus16(0x00ff)); |
| expectEquals(0xffffff01, $noinline$IntDivByMinus16(0x0fff)); |
| expectEquals(0xfffff001, $noinline$IntDivByMinus16(0x00ffff)); |
| expectEquals(0xf8000001, $noinline$IntDivByMinus16(Integer.MAX_VALUE)); |
| expectEquals(0x08000000, $noinline$IntDivByMinus16(Integer.MIN_VALUE)); |
| |
| expectEquals(0, $noinline$IntDivByIntMin(0)); |
| expectEquals(0, $noinline$IntDivByIntMin(1)); |
| expectEquals(0, $noinline$IntDivByIntMin(-1)); |
| expectEquals(1, $noinline$IntDivByIntMin(Integer.MIN_VALUE)); |
| expectEquals(0, $noinline$IntDivByIntMin(Integer.MAX_VALUE)); |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Integer DivTest.$noinline$IntDivBy2(int) disassembly (after) |
| /// CHECK: add w{{\d+}}, w{{\d+}}, w{{\d+}}, lsr #31 |
| /// CHECK: asr w{{\d+}}, w{{\d+}}, #1 |
| /// CHECK-START-X86_64: java.lang.Integer DivTest.$noinline$IntDivBy2(int) disassembly (after) |
| /// CHECK-NOT: cmovnl/geq |
| /// CHECK: add |
| private static Integer $noinline$IntDivBy2(int v) { |
| int r = v / 2; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Integer DivTest.$noinline$IntDivByMinus2(int) disassembly (after) |
| /// CHECK: add w{{\d+}}, w{{\d+}}, w{{\d+}}, lsr #31 |
| /// CHECK: neg w{{\d+}}, w{{\d+}}, asr #1 |
| /// CHECK-START-X86_64: java.lang.Integer DivTest.$noinline$IntDivByMinus2(int) disassembly (after) |
| /// CHECK-NOT: cmovnl/geq |
| /// CHECK: add |
| private static Integer $noinline$IntDivByMinus2(int v) { |
| int r = v / -2; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Integer DivTest.$noinline$IntDivBy16(int) disassembly (after) |
| /// CHECK: add w{{\d+}}, w{{\d+}}, #0xf |
| /// CHECK: cmp w{{\d+}}, #0x0 |
| /// CHECK: csel w{{\d+}}, w{{\d+}}, w{{\d+}}, lt |
| /// CHECK: asr w{{\d+}}, w{{\d+}}, #4 |
| private static Integer $noinline$IntDivBy16(int v) { |
| int r = v / 16; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Integer DivTest.$noinline$IntDivByMinus16(int) disassembly (after) |
| /// CHECK: add w{{\d+}}, w{{\d+}}, #0xf |
| /// CHECK: cmp w{{\d+}}, #0x0 |
| /// CHECK: csel w{{\d+}}, w{{\d+}}, w{{\d+}}, lt |
| /// CHECK: neg w{{\d+}}, w{{\d+}}, asr #4 |
| private static Integer $noinline$IntDivByMinus16(int v) { |
| int r = v / -16; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Integer DivTest.$noinline$IntDivByIntMin(int) disassembly (after) |
| /// CHECK: mov w{{\d+}}, #0x7fffffff |
| /// CHECK: add w{{\d+}}, w{{\d+}}, w{{\d+}} |
| /// CHECK: cmp w{{\d+}}, #0x0 |
| /// CHECK: csel w{{\d+}}, w{{\d+}}, w{{\d+}}, lt |
| /// CHECK: neg w{{\d+}}, w{{\d+}}, asr #31 |
| private static Integer $noinline$IntDivByIntMin(int v) { |
| int r = v / Integer.MIN_VALUE; |
| return r; |
| } |
| |
| private static void divLong() { |
| expectEquals(0L, $noinline$LongDivBy2(0L)); |
| expectEquals(0L, $noinline$LongDivBy2(1L)); |
| expectEquals(0L, $noinline$LongDivBy2(-1L)); |
| expectEquals(1L, $noinline$LongDivBy2(2L)); |
| expectEquals(-1L, $noinline$LongDivBy2(-2L)); |
| expectEquals(1L, $noinline$LongDivBy2(3L)); |
| expectEquals(-1L, $noinline$LongDivBy2(-3L)); |
| expectEquals(3L, $noinline$LongDivBy2(7L)); |
| expectEquals(-3L, $noinline$LongDivBy2(-7L)); |
| expectEquals(4L, $noinline$LongDivBy2(8L)); |
| expectEquals(-4L, $noinline$LongDivBy2(-8L)); |
| expectEquals(7L, $noinline$LongDivBy2(0x0fL)); |
| expectEquals(0x007fL, $noinline$LongDivBy2(0x00ffL)); |
| expectEquals(0x07ffL, $noinline$LongDivBy2(0x0fffL)); |
| expectEquals(0x007fffL, $noinline$LongDivBy2(0x00ffffL)); |
| expectEquals(0x3fffffffffffffffL, $noinline$LongDivBy2(Long.MAX_VALUE)); |
| expectEquals(0xc000000000000000L, $noinline$LongDivBy2(Long.MIN_VALUE)); |
| |
| expectEquals(0L, $noinline$LongDivByMinus2(0)); |
| expectEquals(0L, $noinline$LongDivByMinus2(1L)); |
| expectEquals(0L, $noinline$LongDivByMinus2(-1L)); |
| expectEquals(-1L, $noinline$LongDivByMinus2(2L)); |
| expectEquals(1L, $noinline$LongDivByMinus2(-2L)); |
| expectEquals(-1L, $noinline$LongDivByMinus2(3L)); |
| expectEquals(1L, $noinline$LongDivByMinus2(-3L)); |
| expectEquals(-3L, $noinline$LongDivByMinus2(7L)); |
| expectEquals(3L, $noinline$LongDivByMinus2(-7L)); |
| expectEquals(-4L, $noinline$LongDivByMinus2(8L)); |
| expectEquals(4L, $noinline$LongDivByMinus2(-8L)); |
| expectEquals(-7L, $noinline$LongDivByMinus2(0x0fL)); |
| expectEquals(0xffffffffffffff81L, $noinline$LongDivByMinus2(0x00ffL)); |
| expectEquals(0xfffffffffffff801L, $noinline$LongDivByMinus2(0x0fffL)); |
| expectEquals(0xffffffffffff8001L, $noinline$LongDivByMinus2(0x00ffffL)); |
| expectEquals(0xc000000000000001L, $noinline$LongDivByMinus2(Long.MAX_VALUE)); |
| expectEquals(0x4000000000000000L, $noinline$LongDivByMinus2(Long.MIN_VALUE)); |
| |
| expectEquals(0L, $noinline$LongDivBy16(0)); |
| expectEquals(1L, $noinline$LongDivBy16(16L)); |
| expectEquals(-1L, $noinline$LongDivBy16(-16L)); |
| expectEquals(2L, $noinline$LongDivBy16(33L)); |
| expectEquals(0x000fL, $noinline$LongDivBy16(0x00ffL)); |
| expectEquals(0x00ffL, $noinline$LongDivBy16(0x0fffL)); |
| expectEquals(0x000fffL, $noinline$LongDivBy16(0x00ffffL)); |
| expectEquals(0x07ffffffffffffffL, $noinline$LongDivBy16(Long.MAX_VALUE)); |
| expectEquals(0xf800000000000000L, $noinline$LongDivBy16(Long.MIN_VALUE)); |
| |
| expectEquals(0L, $noinline$LongDivByMinus16(0)); |
| expectEquals(-1L, $noinline$LongDivByMinus16(16L)); |
| expectEquals(1L, $noinline$LongDivByMinus16(-16L)); |
| expectEquals(-2L, $noinline$LongDivByMinus16(33L)); |
| expectEquals(0xfffffffffffffff1L, $noinline$LongDivByMinus16(0x00ffL)); |
| expectEquals(0xffffffffffffff01L, $noinline$LongDivByMinus16(0x0fffL)); |
| expectEquals(0xfffffffffffff001L, $noinline$LongDivByMinus16(0x00ffffL)); |
| expectEquals(0xf800000000000001L, $noinline$LongDivByMinus16(Long.MAX_VALUE)); |
| expectEquals(0x0800000000000000L, $noinline$LongDivByMinus16(Long.MIN_VALUE)); |
| |
| expectEquals(0L, $noinline$LongDivByLongMin(0)); |
| expectEquals(0L, $noinline$LongDivByLongMin(1)); |
| expectEquals(0L, $noinline$LongDivByLongMin(-1)); |
| expectEquals(1L, $noinline$LongDivByLongMin(Long.MIN_VALUE)); |
| expectEquals(0L, $noinline$LongDivByLongMin(Long.MAX_VALUE)); |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Long DivTest.$noinline$LongDivBy2(long) disassembly (after) |
| /// CHECK: add x{{\d+}}, x{{\d+}}, x{{\d+}}, lsr #63 |
| /// CHECK: asr x{{\d+}}, x{{\d+}}, #1 |
| /// CHECK-START-X86_64: java.lang.Long DivTest.$noinline$LongDivBy2(long) disassembly (after) |
| /// CHECK-NOT: cmovnl/geq |
| /// CHECK: addq |
| private static Long $noinline$LongDivBy2(long v) { |
| long r = v / 2; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Long DivTest.$noinline$LongDivByMinus2(long) disassembly (after) |
| /// CHECK: add x{{\d+}}, x{{\d+}}, x{{\d+}}, lsr #63 |
| /// CHECK: neg x{{\d+}}, x{{\d+}}, asr #1 |
| /// CHECK-START-X86_64: java.lang.Long DivTest.$noinline$LongDivByMinus2(long) disassembly (after) |
| /// CHECK-NOT: cmovnl/geq |
| /// CHECK: addq |
| private static Long $noinline$LongDivByMinus2(long v) { |
| long r = v / -2; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Long DivTest.$noinline$LongDivBy16(long) disassembly (after) |
| /// CHECK: add x{{\d+}}, x{{\d+}}, #0xf |
| /// CHECK: cmp x{{\d+}}, #0x0 |
| /// CHECK: csel x{{\d+}}, x{{\d+}}, x{{\d+}}, lt |
| /// CHECK: asr x{{\d+}}, x{{\d+}}, #4 |
| private static Long $noinline$LongDivBy16(long v) { |
| long r = v / 16; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Long DivTest.$noinline$LongDivByMinus16(long) disassembly (after) |
| /// CHECK: add x{{\d+}}, x{{\d+}}, #0xf |
| /// CHECK: cmp x{{\d+}}, #0x0 |
| /// CHECK: csel x{{\d+}}, x{{\d+}}, x{{\d+}}, lt |
| /// CHECK: neg x{{\d+}}, x{{\d+}}, asr #4 |
| private static Long $noinline$LongDivByMinus16(long v) { |
| long r = v / -16; |
| return r; |
| } |
| |
| /// CHECK-START-ARM64: java.lang.Long DivTest.$noinline$LongDivByLongMin(long) disassembly (after) |
| /// CHECK: mov x{{\d+}}, #0x7fffffffffffffff |
| /// CHECK: add x{{\d+}}, x{{\d+}}, x{{\d+}} |
| /// CHECK: cmp x{{\d+}}, #0x0 |
| /// CHECK: csel x{{\d+}}, x{{\d+}}, x{{\d+}}, lt |
| /// CHECK: neg x{{\d+}}, x{{\d+}}, asr #63 |
| private static Long $noinline$LongDivByLongMin(long v) { |
| long r = v / Long.MIN_VALUE; |
| return r; |
| } |
| } |
