net: move compute_mcast_idx() to net.h

Reduce duplicated codes.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 0 insertions, 24 deletions

diff --git a/hw/ne2000.c b/hw/ne2000.c
index 71452e1f2e..d02e60c4a6 100644
--- a/hw/ne2000.c
+++ b/hw/ne2000.c
@@ -150,30 +150,6 @@ static void ne2000_update_irq(NE2000State *s)
     qemu_set_irq(s->irq, (isr != 0));
 }
 
-#define POLYNOMIAL 0x04c11db6
-
-/* From FreeBSD */
-/* XXX: optimize */
-static int compute_mcast_idx(const uint8_t *ep)
-{
-    uint32_t crc;
-    int carry, i, j;
-    uint8_t b;
-
-    crc = 0xffffffff;
-    for (i = 0; i < 6; i++) {
-        b = *ep++;
-        for (j = 0; j < 8; j++) {
-            carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
-            crc <<= 1;
-            b >>= 1;
-            if (carry)
-                crc = ((crc ^ POLYNOMIAL) | carry);
-        }
-    }
-    return (crc >> 26);
-}
-
 static int ne2000_buffer_full(NE2000State *s)
 {
     int avail, index, boundary;