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-rw-r--r--core/templates/hashfuncs.h18
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;
}