nb_kernel300_ia32_sse2.s
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#### $Id: nb_kernel300_ia32_sse2.s,v 1.1.2.2 2007/11/28 18:35:35 spoel Exp $#### Gromacs 4.0 Copyright (c) 1991-2003 ## David van der Spoel, Erik Lindahl#### This program is free software; you can redistribute it and/or## modify it under the terms of the GNU General Public License## as published by the Free Software Foundation; either version 2## of the License, or (at your option) any later version.#### To help us fund GROMACS development, we humbly ask that you cite## the research papers on the package. Check out http://www.gromacs.org## ## And Hey:## Gnomes, ROck Monsters And Chili Sauce##.globl nb_kernel300_ia32_sse2.globl _nb_kernel300_ia32_sse2nb_kernel300_ia32_sse2: _nb_kernel300_ia32_sse2: .set nb300_p_nri, 8.set nb300_iinr, 12.set nb300_jindex, 16.set nb300_jjnr, 20.set nb300_shift, 24.set nb300_shiftvec, 28.set nb300_fshift, 32.set nb300_gid, 36.set nb300_pos, 40.set nb300_faction, 44.set nb300_charge, 48.set nb300_p_facel, 52.set nb300_argkrf, 56.set nb300_argcrf, 60.set nb300_Vc, 64.set nb300_type, 68.set nb300_p_ntype, 72.set nb300_vdwparam, 76.set nb300_Vvdw, 80.set nb300_p_tabscale, 84.set nb300_VFtab, 88.set nb300_invsqrta, 92.set nb300_dvda, 96.set nb300_p_gbtabscale, 100.set nb300_GBtab, 104.set nb300_p_nthreads, 108.set nb300_count, 112.set nb300_mtx, 116.set nb300_outeriter, 120.set nb300_inneriter, 124.set nb300_work, 128 ## stack offsets for local variables ## bottom of stack is cache-aligned for sse2 use .set nb300_ix, 0.set nb300_iy, 16.set nb300_iz, 32.set nb300_iq, 48.set nb300_dx, 64.set nb300_dy, 80.set nb300_dz, 96.set nb300_two, 112.set nb300_tsc, 128.set nb300_qq, 144.set nb300_fs, 160.set nb300_vctot, 176.set nb300_fix, 192.set nb300_fiy, 208.set nb300_fiz, 224.set nb300_half, 240.set nb300_three, 256.set nb300_is3, 272.set nb300_ii3, 276.set nb300_innerjjnr, 280.set nb300_innerk, 284.set nb300_n, 288.set nb300_nn1, 292.set nb300_nri, 296.set nb300_facel, 304 ## uses 8 bytes.set nb300_nouter, 312.set nb300_ninner, 316.set nb300_salign, 320 pushl %ebp movl %esp,%ebp pushl %eax pushl %ebx pushl %ecx pushl %edx pushl %esi pushl %edi subl $324,%esp ## local stack space movl %esp,%eax andl $0xf,%eax subl %eax,%esp movl %eax,nb300_salign(%esp) emms ## Move args passed by reference to stack movl nb300_p_nri(%ebp),%ecx movl nb300_p_facel(%ebp),%esi movl (%ecx),%ecx movsd (%esi),%xmm7 movl %ecx,nb300_nri(%esp) movsd %xmm7,nb300_facel(%esp) ## zero iteration counters movl $0,%eax movl %eax,nb300_nouter(%esp) movl %eax,nb300_ninner(%esp) movl nb300_p_tabscale(%ebp),%eax movsd (%eax),%xmm3 shufpd $0,%xmm3,%xmm3 movapd %xmm3,nb300_tsc(%esp) ## create constant floating-point factors on stack movl $0x00000000,%eax ## lower half of double 0.5 IEEE (hex) movl $0x3fe00000,%ebx movl %eax,nb300_half(%esp) movl %ebx,nb300_half+4(%esp) movsd nb300_half(%esp),%xmm1 shufpd $0,%xmm1,%xmm1 ## splat to all elements movapd %xmm1,%xmm3 addpd %xmm3,%xmm3 ## 1.0 movapd %xmm3,%xmm2 addpd %xmm2,%xmm2 ## 2.0 addpd %xmm2,%xmm3 ## 3.0 movapd %xmm1,nb300_half(%esp) movapd %xmm2,nb300_two(%esp) movapd %xmm3,nb300_three(%esp)_nb_kernel300_ia32_sse2.nb300_threadloop: movl nb300_count(%ebp),%esi ## pointer to sync counter movl (%esi),%eax_nb_kernel300_ia32_sse2.nb300_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_kernel300_ia32_sse2.nb300_spinlock ## if(nn1>nri) nn1=nri movl nb300_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,nb300_n(%esp) movl %ebx,nb300_nn1(%esp) subl %eax,%ebx ## calc number of outer lists movl %eax,%esi ## copy n to esi jg _nb_kernel300_ia32_sse2.nb300_outerstart jmp _nb_kernel300_ia32_sse2.nb300_end_nb_kernel300_ia32_sse2.nb300_outerstart: ## ebx contains number of outer iterations addl nb300_nouter(%esp),%ebx movl %ebx,nb300_nouter(%esp)_nb_kernel300_ia32_sse2.nb300_outer: movl nb300_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,nb300_is3(%esp) ## store is3 movl nb300_shiftvec(%ebp),%eax ## eax = base of shiftvec[] movsd (%eax,%ebx,8),%xmm0 movsd 8(%eax,%ebx,8),%xmm1 movsd 16(%eax,%ebx,8),%xmm2 movl nb300_iinr(%ebp),%ecx ## ecx = pointer into iinr[] movl (%ecx,%esi,4),%ebx ## ebx =ii movl nb300_charge(%ebp),%edx movsd (%edx,%ebx,8),%xmm3 mulsd nb300_facel(%esp),%xmm3 shufpd $0,%xmm3,%xmm3 leal (%ebx,%ebx,2),%ebx ## ebx = 3*ii=ii3 movl nb300_pos(%ebp),%eax ## eax = base of pos[] addsd (%eax,%ebx,8),%xmm0 addsd 8(%eax,%ebx,8),%xmm1 addsd 16(%eax,%ebx,8),%xmm2 movapd %xmm3,nb300_iq(%esp) shufpd $0,%xmm0,%xmm0 shufpd $0,%xmm1,%xmm1 shufpd $0,%xmm2,%xmm2 movapd %xmm0,nb300_ix(%esp) movapd %xmm1,nb300_iy(%esp) movapd %xmm2,nb300_iz(%esp) movl %ebx,nb300_ii3(%esp) ## clear vctot and i forces xorpd %xmm4,%xmm4 movapd %xmm4,nb300_vctot(%esp) movapd %xmm4,nb300_fix(%esp) movapd %xmm4,nb300_fiy(%esp) movapd %xmm4,nb300_fiz(%esp) movl nb300_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 nb300_pos(%ebp),%esi movl nb300_faction(%ebp),%edi movl nb300_jjnr(%ebp),%eax shll $2,%ecx addl %ecx,%eax movl %eax,nb300_innerjjnr(%esp) ## pointer to jjnr[nj0] movl %edx,%ecx subl $2,%edx addl nb300_ninner(%esp),%ecx movl %ecx,nb300_ninner(%esp) addl $0,%edx movl %edx,nb300_innerk(%esp) ## number of innerloop atoms jge _nb_kernel300_ia32_sse2.nb300_unroll_loop jmp _nb_kernel300_ia32_sse2.nb300_checksingle_nb_kernel300_ia32_sse2.nb300_unroll_loop: ## twice unrolled innerloop here movl nb300_innerjjnr(%esp),%edx ## pointer to jjnr[k] movl (%edx),%eax movl 4(%edx),%ebx addl $8,nb300_innerjjnr(%esp) ## advance pointer (unrolled 2) movl nb300_charge(%ebp),%esi ## base of charge[] movlpd (%esi,%eax,8),%xmm3 movhpd (%esi,%ebx,8),%xmm3 movapd nb300_iq(%esp),%xmm2 mulpd %xmm2,%xmm3 movapd %xmm3,nb300_qq(%esp) movl nb300_pos(%ebp),%esi ## base of pos[] leal (%eax,%eax,2),%eax ## replace jnr with j3 leal (%ebx,%ebx,2),%ebx ## move two coordinates to xmm0-xmm2 movlpd (%esi,%eax,8),%xmm0 movlpd 8(%esi,%eax,8),%xmm1 movlpd 16(%esi,%eax,8),%xmm2 movhpd (%esi,%ebx,8),%xmm0 movhpd 8(%esi,%ebx,8),%xmm1 movhpd 16(%esi,%ebx,8),%xmm2 movl nb300_faction(%ebp),%edi ## move nb300_ix-iz to xmm4-xmm6 movapd nb300_ix(%esp),%xmm4 movapd nb300_iy(%esp),%xmm5 movapd nb300_iz(%esp),%xmm6 ## calc dr subpd %xmm0,%xmm4 subpd %xmm1,%xmm5 subpd %xmm2,%xmm6 ## store dr movapd %xmm4,nb300_dx(%esp) movapd %xmm5,nb300_dy(%esp) movapd %xmm6,nb300_dz(%esp) ## square it mulpd %xmm4,%xmm4 mulpd %xmm5,%xmm5 mulpd %xmm6,%xmm6 addpd %xmm5,%xmm4 addpd %xmm6,%xmm4 ## rsq in xmm4 cvtpd2ps %xmm4,%xmm5 rsqrtps %xmm5,%xmm5 cvtps2pd %xmm5,%xmm2 ## lu in low xmm2 ## lookup seed in xmm2 movapd %xmm2,%xmm5 ## copy of lu mulpd %xmm2,%xmm2 ## lu*lu movapd nb300_three(%esp),%xmm1 mulpd %xmm4,%xmm2 ## rsq*lu*lu movapd nb300_half(%esp),%xmm0 subpd %xmm2,%xmm1 ## 30-rsq*lu*lu mulpd %xmm5,%xmm1 mulpd %xmm0,%xmm1 ## xmm0=iter1 of rinv (new lu) movapd %xmm1,%xmm5 ## copy of lu mulpd %xmm1,%xmm1 ## lu*lu movapd nb300_three(%esp),%xmm2 mulpd %xmm4,%xmm1 ## rsq*lu*lu movapd nb300_half(%esp),%xmm0 subpd %xmm1,%xmm2 ## 30-rsq*lu*lu mulpd %xmm5,%xmm2 mulpd %xmm2,%xmm0 ## xmm0=iter2 of rinv (new lu) mulpd %xmm0,%xmm4 ## xmm4=r mulpd nb300_tsc(%esp),%xmm4 cvttpd2pi %xmm4,%mm6 ## mm6 = lu idx cvtpi2pd %mm6,%xmm5 subpd %xmm5,%xmm4 movapd %xmm4,%xmm1 ## xmm1=eps movapd %xmm1,%xmm2 mulpd %xmm2,%xmm2 ## xmm2=eps2 pslld $2,%mm6 ## idx *= 4 movd %eax,%mm0 movd %ebx,%mm1 movl nb300_VFtab(%ebp),%esi movd %mm6,%eax psrlq $32,%mm6 movd %mm6,%ebx ## indices in eax/ebx movlpd (%esi,%eax,8),%xmm4 ## Y1 movlpd (%esi,%ebx,8),%xmm3 ## Y2 movhpd 8(%esi,%eax,8),%xmm4 ## Y1 F1 movhpd 8(%esi,%ebx,8),%xmm3 ## Y2 F2 movapd %xmm4,%xmm5 unpcklpd %xmm3,%xmm4 ## Y1 Y2 unpckhpd %xmm3,%xmm5 ## F1 F2 movlpd 16(%esi,%eax,8),%xmm6 ## G1 movlpd 16(%esi,%ebx,8),%xmm3 ## G2 movhpd 24(%esi,%eax,8),%xmm6 ## G1 H1 movhpd 24(%esi,%ebx,8),%xmm3 ## G2 H2 movapd %xmm6,%xmm7 unpcklpd %xmm3,%xmm6 ## G1 G2 unpckhpd %xmm3,%xmm7 ## H1 H2 ## coulomb table ready, in xmm4-xmm7 mulpd %xmm1,%xmm6 ## xmm6=Geps mulpd %xmm2,%xmm7 ## xmm7=Heps2 addpd %xmm6,%xmm5 addpd %xmm7,%xmm5 ## xmm5=Fp mulpd nb300_two(%esp),%xmm7 ## two*Heps2 movapd nb300_qq(%esp),%xmm3 addpd %xmm6,%xmm7 addpd %xmm5,%xmm7 ## xmm7=FF mulpd %xmm1,%xmm5 ## xmm5=eps*Fp addpd %xmm4,%xmm5 ## xmm5=VV mulpd %xmm3,%xmm5 ## vcoul=qq*VV mulpd %xmm7,%xmm3 ## fijC=FF*qq ## at this point mm5 contains vcoul and mm3 fijC ## increment vcoul - then we can get rid of mm5 ## update vctot addpd nb300_vctot(%esp),%xmm5 movapd %xmm5,nb300_vctot(%esp) xorpd %xmm4,%xmm4 mulpd nb300_tsc(%esp),%xmm3 mulpd %xmm0,%xmm3 subpd %xmm3,%xmm4 movapd nb300_dx(%esp),%xmm0 movapd nb300_dy(%esp),%xmm1 movapd nb300_dz(%esp),%xmm2 movd %mm0,%eax movd %mm1,%ebx movl nb300_faction(%ebp),%edi mulpd %xmm4,%xmm0 mulpd %xmm4,%xmm1 mulpd %xmm4,%xmm2 ## xmm0-xmm2 contains tx-tz (partial force) ## now update f_i movapd nb300_fix(%esp),%xmm3 movapd nb300_fiy(%esp),%xmm4 movapd nb300_fiz(%esp),%xmm5 addpd %xmm0,%xmm3 addpd %xmm1,%xmm4 addpd %xmm2,%xmm5⌨️ 快捷键说明
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