nb_kernel100_ia32_sse2.s
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#### $Id: nb_kernel100_ia32_sse2.s,v 1.1.2.2 2007/11/28 18:35:33 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_kernel100_ia32_sse2.globl _nb_kernel100_ia32_sse2nb_kernel100_ia32_sse2: _nb_kernel100_ia32_sse2: .set nb100_p_nri, 8.set nb100_iinr, 12.set nb100_jindex, 16.set nb100_jjnr, 20.set nb100_shift, 24.set nb100_shiftvec, 28.set nb100_fshift, 32.set nb100_gid, 36.set nb100_pos, 40.set nb100_faction, 44.set nb100_charge, 48.set nb100_p_facel, 52.set nb100_argkrf, 56.set nb100_argcrf, 60.set nb100_Vc, 64.set nb100_type, 68.set nb100_p_ntype, 72.set nb100_vdwparam, 76.set nb100_Vvdw, 80.set nb100_p_tabscale, 84.set nb100_VFtab, 88.set nb100_invsqrta, 92.set nb100_dvda, 96.set nb100_p_gbtabscale, 100.set nb100_GBtab, 104.set nb100_p_nthreads, 108.set nb100_count, 112.set nb100_mtx, 116.set nb100_outeriter, 120.set nb100_inneriter, 124.set nb100_work, 128 ## stack offsets for local variables ## bottom of stack is cache-aligned for sse2 use .set nb100_ix, 0.set nb100_iy, 16.set nb100_iz, 32.set nb100_iq, 48.set nb100_dx, 64.set nb100_dy, 80.set nb100_dz, 96.set nb100_vctot, 112.set nb100_fix, 128.set nb100_fiy, 144.set nb100_fiz, 160.set nb100_half, 176.set nb100_three, 192.set nb100_is3, 208.set nb100_ii3, 212.set nb100_innerjjnr, 216.set nb100_innerk, 220.set nb100_n, 224.set nb100_nn1, 228.set nb100_nri, 232.set nb100_facel, 240 ## uses 8 bytes.set nb100_nouter, 248.set nb100_ninner, 252.set nb100_salign, 256 pushl %ebp movl %esp,%ebp pushl %eax pushl %ebx pushl %ecx pushl %edx pushl %esi pushl %edi subl $260,%esp ## local stack space movl %esp,%eax andl $0xf,%eax subl %eax,%esp movl %eax,nb100_salign(%esp) emms ## Move args passed by reference to stack movl nb100_p_nri(%ebp),%ecx movl nb100_p_facel(%ebp),%esi movl (%ecx),%ecx movsd (%esi),%xmm7 movl %ecx,nb100_nri(%esp) movsd %xmm7,nb100_facel(%esp) ## zero iteration counters movl $0,%eax movl %eax,nb100_nouter(%esp) movl %eax,nb100_ninner(%esp) ## create constant floating-point factors on stack movl $0x00000000,%eax ## lower half of double 0.5 IEEE (hex) movl $0x3fe00000,%ebx movl %eax,nb100_half(%esp) movl %ebx,nb100_half+4(%esp) movsd nb100_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,nb100_half(%esp) movapd %xmm3,nb100_three(%esp)_nb_kernel100_ia32_sse2.nb100_threadloop: movl nb100_count(%ebp),%esi ## pointer to sync counter movl (%esi),%eax_nb_kernel100_ia32_sse2.nb100_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_kernel100_ia32_sse2.nb100_spinlock ## if(nn1>nri) nn1=nri movl nb100_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,nb100_n(%esp) movl %ebx,nb100_nn1(%esp) subl %eax,%ebx ## calc number of outer lists movl %eax,%esi ## copy n to esi jg _nb_kernel100_ia32_sse2.nb100_outerstart jmp _nb_kernel100_ia32_sse2.nb100_end_nb_kernel100_ia32_sse2.nb100_outerstart: ## ebx contains number of outer iterations addl nb100_nouter(%esp),%ebx movl %ebx,nb100_nouter(%esp)_nb_kernel100_ia32_sse2.nb100_outer: movl nb100_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,nb100_is3(%esp) ## store is3 movl nb100_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 nb100_iinr(%ebp),%ecx ## ecx = pointer into iinr[] movl (%ecx,%esi,4),%ebx ## ebx =ii movl nb100_charge(%ebp),%edx movsd (%edx,%ebx,8),%xmm3 mulsd nb100_facel(%esp),%xmm3 shufpd $0,%xmm3,%xmm3 leal (%ebx,%ebx,2),%ebx ## ebx = 3*ii=ii3 movl nb100_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,nb100_iq(%esp) shufpd $0,%xmm0,%xmm0 shufpd $0,%xmm1,%xmm1 shufpd $0,%xmm2,%xmm2 movapd %xmm0,nb100_ix(%esp) movapd %xmm1,nb100_iy(%esp) movapd %xmm2,nb100_iz(%esp) movl %ebx,nb100_ii3(%esp) ## clear vctot and i forces xorpd %xmm4,%xmm4 movapd %xmm4,nb100_vctot(%esp) movapd %xmm4,nb100_fix(%esp) movapd %xmm4,nb100_fiy(%esp) movapd %xmm4,nb100_fiz(%esp) movl nb100_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 nb100_pos(%ebp),%esi movl nb100_faction(%ebp),%edi movl nb100_jjnr(%ebp),%eax shll $2,%ecx addl %ecx,%eax movl %eax,nb100_innerjjnr(%esp) ## pointer to jjnr[nj0] movl %edx,%ecx subl $2,%edx addl nb100_ninner(%esp),%ecx movl %ecx,nb100_ninner(%esp) addl $0,%edx movl %edx,nb100_innerk(%esp) ## number of innerloop atoms jge _nb_kernel100_ia32_sse2.nb100_unroll_loop jmp _nb_kernel100_ia32_sse2.nb100_checksingle_nb_kernel100_ia32_sse2.nb100_unroll_loop: ## twice unrolled innerloop here movl nb100_innerjjnr(%esp),%edx ## pointer to jjnr[k] movl (%edx),%eax movl 4(%edx),%ebx addl $8,nb100_innerjjnr(%esp) ## advance pointer (unrolled 2) movl nb100_charge(%ebp),%esi ## base of charge[] movlpd (%esi,%eax,8),%xmm3 ## jq A movhpd (%esi,%ebx,8),%xmm3 ## jq B movapd nb100_iq(%esp),%xmm5 mulpd %xmm5,%xmm3 ## qq movl nb100_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 nb100_faction(%ebp),%edi ## move nb100_ix-iz to xmm4-xmm6 movapd nb100_ix(%esp),%xmm4 movapd nb100_iy(%esp),%xmm5 movapd nb100_iz(%esp),%xmm6 ## calc dr subpd %xmm0,%xmm4 subpd %xmm1,%xmm5 subpd %xmm2,%xmm6 ## store dr movapd %xmm4,nb100_dx(%esp) movapd %xmm5,nb100_dy(%esp) movapd %xmm6,nb100_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 nb100_three(%esp),%xmm1 mulpd %xmm4,%xmm2 ## rsq*lu*lu movapd nb100_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 nb100_three(%esp),%xmm2 mulpd %xmm4,%xmm1 ## rsq*lu*lu movapd nb100_half(%esp),%xmm0 subpd %xmm1,%xmm2 ## 30-rsq*lu*lu mulpd %xmm5,%xmm2 mulpd %xmm2,%xmm0 ## xmm0=iter2 of rinv (new lu) movapd %xmm0,%xmm4 mulpd %xmm4,%xmm4 ## xmm4=rinvsq movapd nb100_vctot(%esp),%xmm5 mulpd %xmm0,%xmm3 ## xmm3=vcoul mulpd %xmm3,%xmm4 ## xmm4=fscal addpd %xmm3,%xmm5 movapd nb100_dx(%esp),%xmm0 movapd nb100_dy(%esp),%xmm1 movapd nb100_dz(%esp),%xmm2 movapd %xmm5,nb100_vctot(%esp) mulpd %xmm4,%xmm0 mulpd %xmm4,%xmm1 mulpd %xmm4,%xmm2 ## xmm0-xmm2 contains tx-tz (partial force) ## now update f_i movapd nb100_fix(%esp),%xmm3 movapd nb100_fiy(%esp),%xmm4 movapd nb100_fiz(%esp),%xmm5 addpd %xmm0,%xmm3 addpd %xmm1,%xmm4 addpd %xmm2,%xmm5⌨️ 快捷键说明
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