1 files changed, 18 insertions, 0 deletions
diff --git a/core/templates/hashfuncs.h b/core/templates/hashfuncs.h
index 86bb1b5228..1ed9ab1987 100644
--- a/core/templates/hashfuncs.h
+++ b/core/templates/hashfuncs.h
@@ -114,6 +114,24 @@ static inline uint32_t make_uint32_t(T p_in) {
 	return _u._u32;
 }
 
+static inline uint64_t hash_djb2_one_float_64(double p_in, uint64_t p_prev = 5381) {
+	union {
+		double d;
+		uint64_t i;
+	} u;
+
+	// Normalize +/- 0.0 and NaN values so they hash the same.
+	if (p_in == 0.0f) {
+		u.d = 0.0;
+	} else if (Math::is_nan(p_in)) {
+		u.d = Math_NAN;
+	} else {
+		u.d = p_in;
+	}
+
+	return ((p_prev << 5) + p_prev) + u.i;
+}
+
 static inline uint64_t hash_djb2_one_64(uint64_t p_in, uint64_t p_prev = 5381) {
 	return ((p_prev << 5) + p_prev) + p_in;
 }