1 files changed, 77 insertions, 0 deletions
diff --git a/luni/src/main/native/java_lang_Double.c b/luni/src/main/native/java_lang_Double.c
new file mode 100644
index 0000000..fd4b7f1
--- /dev/null
+++ b/luni/src/main/native/java_lang_Double.c
@@ -0,0 +1,77 @@
+//
+//  java_lang_Double.c
+//  Android
+//
+//  Copyright 2005 The Android Open Source Project
+//
+#include "JNIHelp.h"
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+
+typedef union {
+    uint64_t    bits;
+    double      d;
+} Double;
+
+#define NaN (0x7ff8000000000000ULL)
+
+/*
+ * public static native long doubleToLongBits(double value)
+ */
+static jlong doubleToLongBits(JNIEnv* env, jclass clazz, jdouble val)
+{
+    Double   d;
+
+    d.d = val;
+
+    //  For this method all values in the NaN range are
+    //  normalized to the canonical NaN value.
+
+    if (isnan(d.d))
+        d.bits = NaN;
+
+    return d.bits;
+}
+
+/*
+ * public static native long doubleToRawLongBits(double value)
+ */
+static jlong doubleToRawLongBits(JNIEnv* env, jclass clazz, jdouble val)
+{
+    Double   d;
+
+    d.d = val;
+
+    return d.bits;
+}
+
+/*
+ * public static native double longBitsToDouble(long bits)
+ */
+static jdouble longBitsToDouble(JNIEnv* env, jclass clazz, jlong val)
+{
+    Double   d;
+
+    d.bits = val;
+
+    return d.d;
+}
+
+/*
+ * JNI registration
+ */
+static JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    { "doubleToLongBits",       "(D)J",     doubleToLongBits },
+    { "doubleToRawLongBits",    "(D)J",     doubleToRawLongBits },
+    { "longBitsToDouble",       "(J)D",     longBitsToDouble },
+};
+int register_java_lang_Double(JNIEnv* env)
+{
+    return jniRegisterNativeMethods(env, "java/lang/Double",
+                gMethods, NELEM(gMethods));
+}
+