nb_kernel102_ia32_3dnow.s

最著名最快的分子模拟软件

        pushl %eax
        pushl %ebx
        pushl %ecx
        pushl %edx
        pushl %esi
        pushl %edi
        subl $104,%esp          ## local stack space 
        femms
        movl nb102nf_p_nri(%ebp),%ecx
        movl nb102nf_p_facel(%ebp),%esi
        movl (%ecx),%ecx
        movl %ecx,nb102nf_nri(%esp)

        ## zero iteration counters
        movl $0,%eax
        movl %eax,nb102nf_nouter(%esp)
        movl %eax,nb102nf_ninner(%esp)
        ## assume we have at least one i particle - start directly      

        movl  nb102nf_iinr(%ebp),%ecx         ## ecx = pointer into iinr[]      
        movl  (%ecx),%ebx           ## ebx=ii 

        movl  nb102nf_charge(%ebp),%edx
        movd  (%esi),%mm1       ## mm1=facel 
        movd  (%edx,%ebx,4),%mm2    ## mm2=charge[ii0] (O) 
        movd  4(%edx,%ebx,4),%mm3       ## mm2=charge[ii0+1] (H)  
        movq  %mm2,%mm4
        pfmul %mm1,%mm4
        movq  %mm3,%mm6
        pfmul %mm1,%mm6
        movq  %mm4,%mm5
        pfmul %mm2,%mm4                 ## mm4=qqOO*facel 
        pfmul %mm3,%mm5                 ## mm5=qqOH*facel 
        pfmul %mm3,%mm6                 ## mm6=qqHH*facel 
        punpckldq %mm5,%mm5         ## spread to both halves 
        punpckldq %mm6,%mm6         ## spread to both halves 
        movq  %mm4,nb102nf_qqOO(%esp)
        movq  %mm5,nb102nf_qqOH(%esp)
        movq  %mm6,nb102nf_qqHH(%esp)
_nb_kernel102nf_ia32_3dnow.nb102nf_threadloop: 
        movl  nb102nf_count(%ebp),%esi            ## pointer to sync counter
        movl  (%esi),%eax
_nb_kernel102nf_ia32_3dnow.nb102nf_spinlock: 
        movl  %eax,%ebx                         ## ebx=*count=nn0
        addl  $1,%ebx                          ## ebx=nn1=nn0+10
        lock 
        cmpxchgl %ebx,(%esi)                    ## write nn1 to *counter,
                                                ## if it hasnt changed.
                                                ## or reread *counter to eax.
        pause                                   ## -> better p4 performance
        jnz _nb_kernel102nf_ia32_3dnow.nb102nf_spinlock

        ## if(nn1>nri) nn1=nri
        movl nb102nf_nri(%esp),%ecx
        movl %ecx,%edx
        subl %ebx,%ecx
        cmovlel %edx,%ebx                       ## if(nn1>nri) nn1=nri
        ## Cleared the spinlock if we got here.
        ## eax contains nn0, ebx contains nn1.
        movl %eax,nb102nf_n(%esp)
        movl %ebx,nb102nf_nn1(%esp)
        subl %eax,%ebx                          ## calc number of outer lists
        movl %eax,%esi                          ## copy n to esi
        jg  _nb_kernel102nf_ia32_3dnow.nb102nf_outerstart
        jmp _nb_kernel102nf_ia32_3dnow.nb102nf_end

_nb_kernel102nf_ia32_3dnow.nb102nf_outerstart: 
        ## ebx contains number of outer iterations
        addl nb102nf_nouter(%esp),%ebx
        movl %ebx,nb102nf_nouter(%esp)

_nb_kernel102nf_ia32_3dnow.nb102nf_outer: 
        movl  nb102nf_shift(%ebp),%eax        ## eax = pointer into shift[] 
        movl  (%eax,%esi,4),%ebx                ## ebx=shift[n] 

        leal  (%ebx,%ebx,2),%ebx    ## ebx=3*is 
        movl  %ebx,nb102nf_is3(%esp)            ## store is3 

        movl  nb102nf_shiftvec(%ebp),%eax     ## eax = base of shiftvec[] 

        movq  (%eax,%ebx,4),%mm5        ## move shX/shY to mm5 and shZ to mm6 
        movd  8(%eax,%ebx,4),%mm6
        movq  %mm5,%mm0
        movq  %mm5,%mm1
        movq  %mm6,%mm2
        punpckldq %mm0,%mm0         ## also expand shX,Y,Z in mm0--mm2 
        punpckhdq %mm1,%mm1
        punpckldq %mm2,%mm2

        movl  nb102nf_iinr(%ebp),%ecx         ## ecx = pointer into iinr[]      
        movl  (%ecx,%esi,4),%ebx            ## ebx=ii 

        leal  (%ebx,%ebx,2),%ebx        ## ebx = 3*ii=ii3 
        movl  nb102nf_pos(%ebp),%eax      ## eax = base of pos[] 

        pfadd (%eax,%ebx,4),%mm5    ## ix = shX + posX (and iy too) 
        movd  8(%eax,%ebx,4),%mm7       ## cant use direct memory add for 4 bytes (iz) 
        movl  %ebx,nb102nf_ii3(%esp)        ## (use mm7 as temp storage for iz) 
        pfadd %mm7,%mm6
        movq  %mm5,nb102nf_ixO(%esp)
        movq  %mm6,nb102nf_izO(%esp)

        movd  12(%eax,%ebx,4),%mm3
        movd  16(%eax,%ebx,4),%mm4
        movd  20(%eax,%ebx,4),%mm5
        punpckldq  24(%eax,%ebx,4),%mm3
        punpckldq  28(%eax,%ebx,4),%mm4
        punpckldq  32(%eax,%ebx,4),%mm5    ## coords of H1 in low mm3-mm5, H2 in high 

        pfadd %mm3,%mm0
        pfadd %mm4,%mm1
        pfadd %mm5,%mm2
        movq %mm0,nb102nf_ixH(%esp)
        movq %mm1,nb102nf_iyH(%esp)
        movq %mm2,nb102nf_izH(%esp)

        ## clear vctot
        pxor  %mm7,%mm7
        movq  %mm7,nb102nf_vctot(%esp)

        movl  nb102nf_jindex(%ebp),%eax
        movl  (%eax,%esi,4),%ecx             ## jindex[n] 
        movl  4(%eax,%esi,4),%edx            ## jindex[n+1] 
        subl  %ecx,%edx              ## number of innerloop atoms 
        movl  %edx,nb102nf_innerk(%esp)      ## number of innerloop atoms 
        addl  nb102nf_ninner(%esp),%edx
        movl  %edx,nb102nf_ninner(%esp)

        movl  nb102nf_pos(%ebp),%esi
        movl  nb102nf_faction(%ebp),%edi
        movl  nb102nf_jjnr(%ebp),%eax
        shll  $2,%ecx
        addl  %ecx,%eax
        movl  %eax,nb102nf_innerjjnr(%esp)       ## pointer to jjnr[nj0] 
_nb_kernel102nf_ia32_3dnow.nb102nf_inner_loop: 
        ## a single j particle iteration here - compare with the unrolled code for comments 
        movl  nb102nf_innerjjnr(%esp),%eax
        movl  (%eax),%eax       ## eax=jnr offset 
        addl $4,nb102nf_innerjjnr(%esp)             ## advance pointer 

        movd  nb102nf_qqOO(%esp),%mm6
        movq  nb102nf_qqOH(%esp),%mm7

        leal  (%eax,%eax,2),%eax
        movq  (%esi,%eax,4),%mm0
        movd  8(%esi,%eax,4),%mm1
        ## copy & expand to mm2-mm4 for the H interactions 
        movq  %mm0,%mm2
        movq  %mm0,%mm3
        movq  %mm1,%mm4
        punpckldq %mm2,%mm2
        punpckhdq %mm3,%mm3
        punpckldq %mm4,%mm4

        pfsubr nb102nf_ixO(%esp),%mm0
        pfsubr nb102nf_izO(%esp),%mm1

        pfmul %mm0,%mm0
        pfmul %mm1,%mm1
        pfacc %mm0,%mm0
        pfadd %mm1,%mm0         ## mm0=rsqO 

        punpckldq %mm2,%mm2
        punpckldq %mm3,%mm3
        punpckldq %mm4,%mm4 ## mm2-mm4 is jx-jz 
        pfsubr nb102nf_ixH(%esp),%mm2
        pfsubr nb102nf_iyH(%esp),%mm3
        pfsubr nb102nf_izH(%esp),%mm4   ## mm2-mm4 is dxH-dzH 

        pfmul %mm2,%mm2
        pfmul %mm3,%mm3
        pfmul %mm4,%mm4

        pfadd %mm2,%mm3
        pfadd %mm4,%mm3         ## mm3=rsqH 

        pfrsqrt %mm0,%mm1

        movq %mm1,%mm2
        pfmul %mm1,%mm1
        pfrsqit1 %mm0,%mm1
        pfrcpit2 %mm2,%mm1      ## mm1=invsqrt 
        ## calculate potential 
        pfmul %mm1,%mm6         ## mm6=vcoul 

        pfrsqrt %mm3,%mm5
        pswapd %mm3,%mm3
        pfrsqrt %mm3,%mm2
        pswapd %mm3,%mm3
        punpckldq %mm2,%mm5     ## seeds are in mm5 now, and rsq in mm3 

        movq %mm5,%mm2
        pfmul %mm5,%mm5
        pfrsqit1 %mm3,%mm5
        pfrcpit2 %mm2,%mm5      ## mm5=invsqrt 
        pfmul %mm5,%mm7         ## mm7=vcoul 

        ## update vctot 
        pfadd %mm6,%mm7
        pfadd nb102nf_vctot(%esp),%mm7
        movq %mm7,nb102nf_vctot(%esp)

        ## interactions with j H1 
        movq  12(%esi,%eax,4),%mm0
        movd  20(%esi,%eax,4),%mm1
        ## copy & expand to mm2-mm4 for the H interactions 
        movq  %mm0,%mm2
        movq  %mm0,%mm3
        movq  %mm1,%mm4
        punpckldq %mm2,%mm2
        punpckhdq %mm3,%mm3
        punpckldq %mm4,%mm4

        movd nb102nf_qqOH(%esp),%mm6
        movq nb102nf_qqHH(%esp),%mm7

        pfsubr nb102nf_ixO(%esp),%mm0
        pfsubr nb102nf_izO(%esp),%mm1

        pfmul %mm0,%mm0
        pfmul %mm1,%mm1
        pfacc %mm1,%mm0
        pfadd %mm1,%mm0         ## mm0=rsqO 

        punpckldq %mm2,%mm2
        punpckldq %mm3,%mm3
        punpckldq %mm4,%mm4 ## mm2-mm4 is jx-jz 
        pfsubr nb102nf_ixH(%esp),%mm2
        pfsubr nb102nf_iyH(%esp),%mm3
        pfsubr nb102nf_izH(%esp),%mm4   ## mm2-mm4 is dxH-dzH 

        pfmul %mm2,%mm2
        pfmul %mm3,%mm3
        pfmul %mm4,%mm4

        pfadd %mm2,%mm3
        pfadd %mm4,%mm3         ## mm3=rsqH 

        pfrsqrt %mm0,%mm1

        movq %mm1,%mm2
        pfmul %mm1,%mm1
        pfrsqit1 %mm0,%mm1
        pfrcpit2 %mm2,%mm1      ## mm1=invsqrt 
        ## calculate potential 
        pfmul %mm1,%mm6         ## mm6=vcoul 

        pfrsqrt %mm3,%mm5
        pswapd %mm3,%mm3
        pfrsqrt %mm3,%mm2
        pswapd %mm3,%mm3
        punpckldq %mm2,%mm5     ## seeds are in mm5 now, and rsq in mm3 

        movq %mm5,%mm2
        pfmul %mm5,%mm5
        pfrsqit1 %mm3,%mm5
        pfrcpit2 %mm2,%mm5      ## mm5=invsqrt 
        pfmul %mm5,%mm7         ## mm7=vcoul 

        ## update vctot 
        pfadd %mm6,%mm7
        pfadd nb102nf_vctot(%esp),%mm7
        movq %mm7,nb102nf_vctot(%esp)

        ## interactions with j H2 
        movq  24(%esi,%eax,4),%mm0
        movd  32(%esi,%eax,4),%mm1
        ## copy & expand to mm2-mm4 for the H interactions 
        movq  %mm0,%mm2
        movq  %mm0,%mm3
        movq  %mm1,%mm4
        punpckldq %mm2,%mm2
        punpckhdq %mm3,%mm3
        punpckldq %mm4,%mm4

        movd nb102nf_qqOH(%esp),%mm6
        movq nb102nf_qqHH(%esp),%mm7

        pfsubr nb102nf_ixO(%esp),%mm0
        pfsubr nb102nf_izO(%esp),%mm1

        pfmul %mm0,%mm0
        pfmul %mm1,%mm1
        pfacc %mm1,%mm0
        pfadd %mm1,%mm0         ## mm0=rsqO 

        punpckldq %mm2,%mm2
        punpckldq %mm3,%mm3
        punpckldq %mm4,%mm4 ## mm2-mm4 is jx-jz 
        pfsubr nb102nf_ixH(%esp),%mm2
        pfsubr nb102nf_iyH(%esp),%mm3
        pfsubr nb102nf_izH(%esp),%mm4   ## mm2-mm4 is dxH-dzH 

        pfmul %mm2,%mm2
        pfmul %mm3,%mm3
        pfmul %mm4,%mm4

        pfadd %mm2,%mm3
        pfadd %mm4,%mm3         ## mm3=rsqH 

        pfrsqrt %mm0,%mm1

        movq %mm1,%mm2
        pfmul %mm1,%mm1
        pfrsqit1 %mm0,%mm1
        pfrcpit2 %mm2,%mm1      ## mm1=invsqrt 
        ## calculate potential 
        pfmul %mm1,%mm6         ## mm6=vcoul 

        pfrsqrt %mm3,%mm5
        pswapd %mm3,%mm3
        pfrsqrt %mm3,%mm2
        pswapd %mm3,%mm3
        punpckldq %mm2,%mm5     ## seeds are in mm5 now, and rsq in mm3 

        movq %mm5,%mm2
        pfmul %mm5,%mm5
        pfrsqit1 %mm3,%mm5
        pfrcpit2 %mm2,%mm5      ## mm5=invsqrt 
        pfmul %mm5,%mm7         ## mm7=vcoul 

        ## update vctot 
        pfadd %mm6,%mm7
        pfadd nb102nf_vctot(%esp),%mm7
        movq %mm7,nb102nf_vctot(%esp)

        ##  done  - one more? 
        decl nb102nf_innerk(%esp)
        jz  _nb_kernel102nf_ia32_3dnow.nb102nf_updateouterdata
        jmp _nb_kernel102nf_ia32_3dnow.nb102nf_inner_loop
_nb_kernel102nf_ia32_3dnow.nb102nf_updateouterdata: 
        ## get n from stack
        movl nb102nf_n(%esp),%esi
        ## get group index for i particle 
        movl  nb102nf_gid(%ebp),%edx            ## base of gid[]
        movl  (%edx,%esi,4),%edx                ## ggid=gid[n]

        movq  nb102nf_vctot(%esp),%mm7
        pfacc %mm7,%mm7           ## get and sum the two parts of total potential 

        movl  nb102nf_Vc(%ebp),%eax
        movd  (%eax,%edx,4),%mm6
        pfadd %mm7,%mm6
        movd  %mm6,(%eax,%edx,4)          ## increment vc[gid] 
       ## finish if last 
        movl nb102nf_nn1(%esp),%ecx
        ## esi already loaded with n
        incl %esi
        subl %esi,%ecx
        jz _nb_kernel102nf_ia32_3dnow.nb102nf_outerend

        ## not last, iterate outer loop once more!  
        movl %esi,nb102nf_n(%esp)
        jmp _nb_kernel102nf_ia32_3dnow.nb102nf_outer
_nb_kernel102nf_ia32_3dnow.nb102nf_outerend: 
        ## check if more outer neighborlists remain
        movl  nb102nf_nri(%esp),%ecx
        ## esi already loaded with n above
        subl  %esi,%ecx
        jz _nb_kernel102nf_ia32_3dnow.nb102nf_end
        ## non-zero, do one more workunit
        jmp   _nb_kernel102nf_ia32_3dnow.nb102nf_threadloop
_nb_kernel102nf_ia32_3dnow.nb102nf_end: 
        femms

        movl nb102nf_nouter(%esp),%eax
        movl nb102nf_ninner(%esp),%ebx
        movl nb102nf_outeriter(%ebp),%ecx
        movl nb102nf_inneriter(%ebp),%edx
        movl %eax,(%ecx)
        movl %ebx,(%edx)

        addl $104,%esp
        popl %edi
        popl %esi
        popl %edx
        popl %ecx
        popl %ebx
        popl %eax
        leave
        ret