[optimizing compiler] Add float/double subtraction

- for arm, x86, x86_64
- add tests
- a bit of clean up

Change-Id: I3761b0d908aca3e3c5d60da481fafb423ff7c9b9

3 files changed, 171 insertions, 0 deletions

diff --git a/test/414-optimizing-arith-sub/expected.txt b/test/414-optimizing-arith-sub/expected.txt
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/414-optimizing-arith-sub/expected.txt
diff --git a/test/414-optimizing-arith-sub/info.txt b/test/414-optimizing-arith-sub/info.txt
new file mode 100644
index 0000000000..1eaa14887b
--- /dev/null
+++ b/test/414-optimizing-arith-sub/info.txt
@@ -0,0 +1 @@
+Subtraction tests.
diff --git a/test/414-optimizing-arith-sub/src/Main.java b/test/414-optimizing-arith-sub/src/Main.java
new file mode 100644
index 0000000000..30e84368d0
--- /dev/null
+++ b/test/414-optimizing-arith-sub/src/Main.java
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+// Note that $opt$ is a marker for the optimizing compiler to ensure
+// it does compile the method.
+public class Main {
+
+  public static void expectEquals(int expected, int result) {
+    if (expected != result) {
+      throw new Error("Expected: " + expected + ", found: " + result);
+    }
+  }
+
+  public static void expectEquals(long expected, long result) {
+    if (expected != result) {
+      throw new Error("Expected: " + expected + ", found: " + result);
+    }
+  }
+
+  public static void expectEquals(float expected, float result) {
+    if (expected != result) {
+      throw new Error("Expected: " + expected + ", found: " + result);
+    }
+  }
+
+  public static void expectEquals(double expected, double result) {
+    if (expected != result) {
+      throw new Error("Expected: " + expected + ", found: " + result);
+    }
+  }
+
+  public static void expectApproxEquals(float a, float b) {
+    float maxDelta = 0.0001F;
+    boolean aproxEquals = (a > b) ? ((a - b) < maxDelta) : ((b - a) < maxDelta);
+    if (!aproxEquals) {
+      throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta + " " + (a - b));
+    }
+  }
+
+  public static void expectApproxEquals(double a, double b) {
+    double maxDelta = 0.00001D;
+    boolean aproxEquals = (a > b) ? ((a - b) < maxDelta) : ((b - a) < maxDelta);
+    if (!aproxEquals) {
+      throw new Error("Expected: " + a + ", found: " + b + ", with delta: " + maxDelta + " " + (a - b));
+    }
+  }
+
+  public static void expectNaN(float a) {
+    if (a == a) {
+      throw new Error("Expected NaN: " + a);
+    }
+  }
+
+  public static void expectNaN(double a) {
+    if (a == a) {
+      throw new Error("Expected NaN: " + a);
+    }
+  }
+
+  public static void main(String[] args) {
+    subInt();
+    subLong();
+    subFloat();
+    subDouble();
+  }
+
+  private static void subInt() {
+    expectEquals(2, $opt$Sub(5, 3));
+    expectEquals(0, $opt$Sub(0, 0));
+    expectEquals(-3, $opt$Sub(0, 3));
+    expectEquals(3, $opt$Sub(3, 0));
+    expectEquals(4, $opt$Sub(1, -3));
+    expectEquals(-9, $opt$Sub(-12, -3));
+    expectEquals(134217724, $opt$Sub(134217729, 5)); // (2^27 + 1) - 5
+  }
+
+  private static void subLong() {
+    expectEquals(2L, $opt$Sub(5L, 3L));
+    expectEquals(0L, $opt$Sub(0L, 0L));
+    expectEquals(-3L, $opt$Sub(0L, 3L));
+    expectEquals(3L, $opt$Sub(3L, 0L));
+    expectEquals(4L, $opt$Sub(1L, -3L));
+    expectEquals(-9L, $opt$Sub(-12L, -3L));
+    expectEquals(134217724L, $opt$Sub(134217729L, 5L)); // (2^27 + 1) - 5
+    expectEquals(34359738362L, $opt$Sub(34359738369L, 7L)); // (2^35 + 1) - 7
+  }
+
+  private static void subFloat() {
+    expectApproxEquals(2F, $opt$Sub(5F, 3F));
+    expectApproxEquals(0F, $opt$Sub(0F, 0F));
+    expectApproxEquals(-3F, $opt$Sub(0F, 3F));
+    expectApproxEquals(3F, $opt$Sub(3F, 0F));
+    expectApproxEquals(4F, $opt$Sub(1F, -3F));
+    expectApproxEquals(-9F, $opt$Sub(-12F, -3F));
+    expectApproxEquals(34359738362F, $opt$Sub(34359738369F, 7F)); // (2^35 + 1) - 7
+    expectApproxEquals(-0.1F, $opt$Sub(0.1F, 0.2F));
+    expectApproxEquals(0.2F, $opt$Sub(-0.5F, -0.7F));
+
+    expectNaN($opt$Sub(Float.NEGATIVE_INFINITY, Float.NEGATIVE_INFINITY));
+    expectNaN($opt$Sub(Float.POSITIVE_INFINITY, Float.POSITIVE_INFINITY));
+    expectNaN($opt$Sub(Float.NaN, 11F));
+    expectNaN($opt$Sub(Float.NaN, -11F));
+    expectNaN($opt$Sub(Float.NaN, Float.NEGATIVE_INFINITY));
+    expectNaN($opt$Sub(Float.NaN, Float.POSITIVE_INFINITY));
+
+    expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(-Float.MAX_VALUE, Float.MAX_VALUE));
+    expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(2F, Float.POSITIVE_INFINITY));
+    expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(Float.MAX_VALUE, -Float.MAX_VALUE));
+    expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(2F, Float.NEGATIVE_INFINITY));
+    expectEquals(Float.POSITIVE_INFINITY, $opt$Sub(Float.POSITIVE_INFINITY, Float.NEGATIVE_INFINITY));
+    expectEquals(Float.NEGATIVE_INFINITY, $opt$Sub(Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY));
+  }
+
+  private static void subDouble() {
+    expectApproxEquals(2D, $opt$Sub(5D, 3D));
+    expectApproxEquals(0D, $opt$Sub(0D, 0D));
+    expectApproxEquals(-3D, $opt$Sub(0D, 3D));
+    expectApproxEquals(3D, $opt$Sub(3D, 0D));
+    expectApproxEquals(4D, $opt$Sub(1D, -3D));
+    expectApproxEquals(-9D, $opt$Sub(-12D, -3D));
+    expectApproxEquals(134217724D, $opt$Sub(134217729D, 5D)); // (2^27 + 1) - 5
+    expectApproxEquals(34359738362D, $opt$Sub(34359738369D, 7D)); // (2^35 + 1) - 7
+    expectApproxEquals(-0.1D, $opt$Sub(0.1D, 0.2D));
+    expectApproxEquals(0.2D, $opt$Sub(-0.5D, -0.7D));
+
+    expectNaN($opt$Sub(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY));
+    expectNaN($opt$Sub(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY));
+    expectNaN($opt$Sub(Double.NaN, 11D));
+    expectNaN($opt$Sub(Double.NaN, -11D));
+    expectNaN($opt$Sub(Double.NaN, Double.NEGATIVE_INFINITY));
+    expectNaN($opt$Sub(Double.NaN, Double.POSITIVE_INFINITY));
+
+    expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(-Double.MAX_VALUE, Double.MAX_VALUE));
+    expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(2D, Double.POSITIVE_INFINITY));
+    expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(Double.MAX_VALUE, -Double.MAX_VALUE));
+    expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(2D, Double.NEGATIVE_INFINITY));
+    expectEquals(Double.POSITIVE_INFINITY, $opt$Sub(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
+    expectEquals(Double.NEGATIVE_INFINITY, $opt$Sub(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY));
+  }
+
+  static int $opt$Sub(int a, int b) {
+    return a - b;
+  }
+
+  static long $opt$Sub(long a, long b) {
+    return a - b;
+  }
+
+  static float $opt$Sub(float a, float b) {
+    return a - b;
+  }
+
+  static double $opt$Sub(double a, double b) {
+    return a - b;
+  }
+
+}