Implement isNaN intrinsic through HIR equivalent.
Rationale:
Efficient implementation on all platforms.
Subject to better compiler optimizations.
Change-Id: Ie8876bf5943cbe1138491a25d32ee9fee554043c
diff --git a/test/575-checker-isnan/src/Main.java b/test/575-checker-isnan/src/Main.java
new file mode 100644
index 0000000..cc71e5e
--- /dev/null
+++ b/test/575-checker-isnan/src/Main.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2016 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 Main {
+
+ /// CHECK-START: boolean Main.isNaN32(float) instruction_simplifier (before)
+ /// CHECK-DAG: <<Result:z\d+>> InvokeStaticOrDirect
+ /// CHECK-DAG: Return [<<Result>>]
+ //
+ /// CHECK-START: boolean Main.isNaN32(float) instruction_simplifier (after)
+ /// CHECK-DAG: <<Result:z\d+>> NotEqual
+ /// CHECK-DAG: Return [<<Result>>]
+ //
+ /// CHECK-START: boolean Main.isNaN32(float) instruction_simplifier (after)
+ /// CHECK-NOT: InvokeStaticOrDirect
+ private static boolean isNaN32(float x) {
+ return Float.isNaN(x);
+ }
+
+ /// CHECK-START: boolean Main.isNaN64(double) instruction_simplifier (before)
+ /// CHECK-DAG: <<Result:z\d+>> InvokeStaticOrDirect
+ /// CHECK-DAG: Return [<<Result>>]
+ //
+ /// CHECK-START: boolean Main.isNaN64(double) instruction_simplifier (after)
+ /// CHECK-DAG: <<Result:z\d+>> NotEqual
+ /// CHECK-DAG: Return [<<Result>>]
+ //
+ /// CHECK-START: boolean Main.isNaN64(double) instruction_simplifier (after)
+ /// CHECK-NOT: InvokeStaticOrDirect
+ private static boolean isNaN64(double x) {
+ return Double.isNaN(x);
+ }
+
+ public static void main(String args[]) {
+ // A few distinct numbers.
+ expectFalse(isNaN32(Float.NEGATIVE_INFINITY));
+ expectFalse(isNaN32(-1.0f));
+ expectFalse(isNaN32(-0.0f));
+ expectFalse(isNaN32(0.0f));
+ expectFalse(isNaN32(1.0f));
+ expectFalse(isNaN32(Float.POSITIVE_INFINITY));
+
+ // A few distinct subnormal numbers.
+ expectFalse(isNaN32(Float.intBitsToFloat(0x00400000)));
+ expectFalse(isNaN32(Float.intBitsToFloat(0x80400000)));
+ expectFalse(isNaN32(Float.intBitsToFloat(0x00000001)));
+ expectFalse(isNaN32(Float.intBitsToFloat(0x80000001)));
+
+ // A few NaN numbers.
+ expectTrue(isNaN32(Float.NaN));
+ expectTrue(isNaN32(0.0f / 0.0f));
+ expectTrue(isNaN32((float)Math.sqrt(-1.0f)));
+ float[] fvals = {
+ Float.intBitsToFloat(0x7f800001),
+ Float.intBitsToFloat(0x7fa00000),
+ Float.intBitsToFloat(0x7fc00000),
+ Float.intBitsToFloat(0x7fffffff),
+ Float.intBitsToFloat(0xff800001),
+ Float.intBitsToFloat(0xffa00000),
+ Float.intBitsToFloat(0xffc00000),
+ Float.intBitsToFloat(0xffffffff)
+ };
+ for (int i = 0; i < fvals.length; i++) {
+ expectTrue(isNaN32(fvals[i]));
+ }
+
+ // A few distinct numbers.
+ expectFalse(isNaN64(Double.NEGATIVE_INFINITY));
+ expectFalse(isNaN32(-1.0f));
+ expectFalse(isNaN64(-0.0d));
+ expectFalse(isNaN64(0.0d));
+ expectFalse(isNaN64(1.0d));
+ expectFalse(isNaN64(Double.POSITIVE_INFINITY));
+
+ // A few distinct subnormal numbers.
+ expectFalse(isNaN64(Double.longBitsToDouble(0x0008000000000000l)));
+ expectFalse(isNaN64(Double.longBitsToDouble(0x8008000000000000l)));
+ expectFalse(isNaN64(Double.longBitsToDouble(0x0000000000000001l)));
+ expectFalse(isNaN64(Double.longBitsToDouble(0x8000000000000001l)));
+
+ // A few NaN numbers.
+ expectTrue(isNaN64(Double.NaN));
+ expectTrue(isNaN64(0.0d / 0.0d));
+ expectTrue(isNaN64(Math.sqrt(-1.0d)));
+ double[] dvals = {
+ Double.longBitsToDouble(0x7ff0000000000001L),
+ Double.longBitsToDouble(0x7ff4000000000000L),
+ Double.longBitsToDouble(0x7ff8000000000000L),
+ Double.longBitsToDouble(0x7fffffffffffffffL),
+ Double.longBitsToDouble(0xfff0000000000001L),
+ Double.longBitsToDouble(0xfff4000000000000L),
+ Double.longBitsToDouble(0xfff8000000000000L),
+ Double.longBitsToDouble(0xffffffffffffffffL)
+ };
+ for (int i = 0; i < dvals.length; i++) {
+ expectTrue(isNaN64(dvals[i]));
+ }
+
+ System.out.println("passed");
+ }
+
+ private static void expectTrue(boolean value) {
+ if (!value) {
+ throw new Error("Expected True");
+ }
+ }
+
+ private static void expectFalse(boolean value) {
+ if (value) {
+ throw new Error("Expected False");
+ }
+ }
+}