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Date:      Thu, 23 Nov 2000 08:37:26 -0800
From:      Julian Elischer <julian@elischer.org>
To:        current@freebsd.org
Subject:   slight improvement in locore.s?
Message-ID:  <3A1D47C6.D35464F0@elischer.org>
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locore.s includes:
#define ALLOCPAGES(foo) \ 
        movl    R(physfree), %esi ; \
        movl    $((foo)*PAGE_SIZE), %eax ; \
        addl    %esi, %eax ; \
        movl    %eax, R(physfree) ; \
        movl    %esi, %edi ; \
        movl    $((foo)*PAGE_SIZE),%ecx ; \
        xorl    %eax,%eax ; \
        cld ; \
        rep ; \
        stosb
        

might it be a very slight optimisation to change this to:
#define ALLOCPAGES(foo) \ 
        movl    R(physfree), %esi ; \
        movl    $((foo)*PAGE_SIZE), %eax ; \
        movl    %eax, %ecx ; \
        addl    %esi, %eax ; \
        movl    %eax, R(physfree) ; \
        movl    %esi, %edi ; \
        xorl    %eax,%eax ; \
        cld ; \
        rep ; \
        stosb
        
??

-- 
      __--_|\  Julian Elischer
     /       \ julian@elischer.org
    (   OZ    ) World tour 2000
---> X_.---._/  presently in:  Budapest
            v



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