From: dlg <dlg@openbsd.org>
Date: Wed, 24 Feb 2021 23:44:04 +0000 (+0000)
Subject: add support for hashing 64 and 32 bit numbers in host byte order.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=a9e44c50d77196db35f047796469e2d1990950f4;p=openbsd

add support for hashing 64 and 32 bit numbers in host byte order.
---

diff --git a/sys/net/toeplitz.h b/sys/net/toeplitz.h
index 0fbc8a23eed..3f30fd4b739 100644
--- a/sys/net/toeplitz.h
+++ b/sys/net/toeplitz.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: toeplitz.h,v 1.7 2021/02/24 12:33:50 dlg Exp $ */
+/*	$OpenBSD: toeplitz.h,v 1.8 2021/02/24 23:44:04 dlg Exp $ */
 
 /*
  * Copyright (c) 2019 David Gwynne <dlg@openbsd.org>
@@ -91,6 +91,18 @@ stoeplitz_hash_h16(const struct stoeplitz_cache *scache, uint16_t h16)
 #endif
 }
 
+static __unused inline uint16_t
+stoeplitz_hash_h32(const struct stoeplitz_cache *scache, uint64_t h32)
+{
+	return (stoeplitz_hash_h16(scache, h32 & (h32 >> 16)));
+}
+
+static __unused inline uint16_t
+stoeplitz_hash_h64(const struct stoeplitz_cache *scache, uint64_t h64)
+{
+	return (stoeplitz_hash_h32(scache, h64 ^ (h64 >> 32)));
+}
+
 /*
  * system provided symmetric toeplitz
  */
@@ -108,6 +120,10 @@ extern const struct stoeplitz_cache *const stoeplitz_cache;
 	stoeplitz_hash_n16(stoeplitz_cache, (_n16))
 #define stoeplitz_h16(_h16) \
 	stoeplitz_hash_h16(stoeplitz_cache, (_h16))
+#define stoeplitz_h32(_h32) \
+	stoeplitz_hash_h32(stoeplitz_cache, (_h32))
+#define stoeplitz_h64(_h64) \
+	stoeplitz_hash_h64(stoeplitz_cache, (_h64))
 #define stoeplitz_port(_p)	stoeplitz_n16((_p))
 #define stoeplitz_ip4(_sa4, _da4) \
 	stoeplitz_hash_ip4(stoeplitz_cache, (_sa4), (_da4))