[src/trunk]: src/sys/dev/ic Use common ether_crc32_le() for multicast hash.

[tsutsui <tsutsui%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ba41ab1767df
branches:  trunk
changeset: 747523:ba41ab1767df
user:      tsutsui <tsutsui%NetBSD.org@localhost>
date:      Sat Sep 19 04:55:45 2009 +0000

description:
Use common ether_crc32_le() for multicast hash.

diffstat:

 sys/dev/ic/hme.c |  25 ++++---------------------
 1 files changed, 4 insertions(+), 21 deletions(-)

diffs (56 lines):

diff -r f06907b15112 -r ba41ab1767df sys/dev/ic/hme.c
--- a/sys/dev/ic/hme.c  Sat Sep 19 04:54:04 2009 +0000
+++ b/sys/dev/ic/hme.c  Sat Sep 19 04:55:45 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: hme.c,v 1.82 2009/09/18 12:40:15 tsutsui Exp $ */
+/*     $NetBSD: hme.c,v 1.83 2009/09/19 04:55:45 tsutsui Exp $ */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hme.c,v 1.82 2009/09/18 12:40:15 tsutsui Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hme.c,v 1.83 2009/09/19 04:55:45 tsutsui Exp $");
 
 /* #define HMEDEBUG */
 
@@ -1561,11 +1561,9 @@
        struct ethercom *ec = &sc->sc_ethercom;
        bus_space_tag_t t = sc->sc_bustag;
        bus_space_handle_t mac = sc->sc_mac;
-       u_char *cp;
+       uint32_t v;
        uint32_t crc;
        uint32_t hash[4];
-       uint32_t v;
-       int len;
 
        /* Clear hash table */
        hash[3] = hash[2] = hash[1] = hash[0] = 0;
@@ -1609,23 +1607,8 @@
                        goto chipit;
                }
 
-               cp = enm->enm_addrlo;
-               crc = 0xffffffff;
-               for (len = sizeof(enm->enm_addrlo); --len >= 0;) {
-                       int octet = *cp++;
-                       int i;
+               crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN);
 
-#define MC_POLY_LE     0xedb88320UL    /* mcast crc, little endian */
-                       for (i = 0; i < 8; i++) {
-                               if ((crc & 1) ^ (octet & 1)) {
-                                       crc >>= 1;
-                                       crc ^= MC_POLY_LE;
-                               } else {
-                                       crc >>= 1;
-                               }
-                               octet >>= 1;
-                       }
-               }
                /* Just want the 6 most significant bits. */
                crc >>= 26;