1 files changed, 85 insertions, 0 deletions
diff --git a/luni/src/main/native/java_lang_Float.c b/luni/src/main/native/java_lang_Float.c
new file mode 100644
index 0000000..2a7af21
--- /dev/null
+++ b/luni/src/main/native/java_lang_Float.c
@@ -0,0 +1,85 @@
+//
+//  java_lang_Float.c
+//  Android
+//
+//  Copyright 2005 The Android Open Source Project
+//
+#include "JNIHelp.h"
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef union {
+    unsigned int    bits;
+    float           f;
+} Float;
+
+#define NaN (0x7fc00000)
+
+/*
+ * Local helper function.
+ */
+static int IsNaN(unsigned bits)
+{
+    return ((bits >= 0x7f800001U && bits <= 0x7fffffffU)
+        ||  (bits >= 0xff800001U && bits <= 0xffffffffU));
+}
+
+/*
+ * public static native int floatToIntBits(float value)
+ */
+static jint floatToIntBits(JNIEnv* env, jclass clazz, jfloat val)
+{
+    Float   f;
+
+    f.f = val;
+
+    //  For this method all values in the NaN range are
+    //  normalized to the canonical NaN value.
+
+    if (IsNaN(f.bits))
+        f.bits = NaN;
+
+    return f.bits;
+}
+
+/*
+ * public static native int floatToRawBits(float value)
+ */
+static jint floatToRawBits(JNIEnv* env, jclass clazz, jfloat val)
+{
+    Float   f;
+
+    f.f = val;
+
+    return f.bits;
+}
+
+/*
+ * public static native float intBitsToFloat(int bits)
+ */
+static jfloat intBitsToFloat(JNIEnv* env, jclass clazz, jint val)
+{
+    Float   f;
+
+    f.bits = val;
+
+    return f.f;
+}
+
+/*
+ * JNI registration
+ */
+static JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    { "floatToIntBits",         "(F)I",     floatToIntBits },
+    { "floatToRawIntBits",      "(F)I",     floatToRawBits },
+    { "intBitsToFloat",         "(I)F",     intBitsToFloat },
+};
+int register_java_lang_Float(JNIEnv* env)
+{
+    return jniRegisterNativeMethods(env, "java/lang/Float",
+        gMethods, NELEM(gMethods));
+}
+