From owner-freebsd-hackers  Tue Oct 17 00:12:13 1995
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From: Julian Elischer <julian@ref.tfs.com>
Message-Id: <199510170711.AAA17450@ref.tfs.com>
Subject: netisr code..
To: hackers@freeBSD.org
Date: Tue, 17 Oct 1995 00:11:44 -0700 (PDT)
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 Why is it done like this?

swi_net:
        MCOUNT
        bsfl    _netisr,%eax
        je      swi_net_done
swi_net_more:
        btrl    %eax,_netisr
        jnc     swi_net_next         <------should never happen
        call    *_netisrs(,%eax,4)
swi_net_next:
        bsfl    _netisr,%eax
        jne     swi_net_more
swi_net_done:
        ret


casual inspection suggests that the following would be as good..
swi_net:
        MCOUNT
swi_net_next:
        bsfl    _netisr,%eax
        je      swi_net_done
        btrl    %eax,_netisr
        call    *_netisrs(,%eax,4)
        jmp     swi_net_next
swi_net_done:
        ret