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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [sparc64/] [lib/] [ipcsum.S] - Rev 3

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        .text
        .align  32
        .globl  ip_fast_csum
        .type   ip_fast_csum,#function
ip_fast_csum:   /* %o0 = iph, %o1 = ihl */
        sub     %o1, 4, %g7
        lduw    [%o0 + 0x00], %o2
        lduw    [%o0 + 0x04], %g2
        lduw    [%o0 + 0x08], %g3
        addcc   %g2, %o2, %o2
        lduw    [%o0 + 0x0c], %g2
        addccc  %g3, %o2, %o2
        lduw    [%o0 + 0x10], %g3

        addccc  %g2, %o2, %o2
        addc    %o2, %g0, %o2
1:      addcc   %g3, %o2, %o2
        add     %o0, 4, %o0
        addccc  %o2, %g0, %o2
        subcc   %g7, 1, %g7
        be,a,pt %icc, 2f
         sll    %o2, 16, %g2

        lduw    [%o0 + 0x10], %g3
        ba,pt   %xcc, 1b
         nop
2:      addcc   %o2, %g2, %g2
        srl     %g2, 16, %o2
        addc    %o2, %g0, %o2
        xnor    %g0, %o2, %o2
        set     0xffff, %o1
        retl
         and    %o2, %o1, %o0
        .size   ip_fast_csum, .-ip_fast_csum

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