nb_kernel100_x86_64_sse.s
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#### $Id: nb_kernel100_x86_64_sse.s,v 1.4.2.3 2006/09/22 08:32:48 lindahl 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_x86_64_sse.globl _nb_kernel100_x86_64_ssenb_kernel100_x86_64_sse: _nb_kernel100_x86_64_sse: ## Room for return address and rbp (16 bytes).set nb100_fshift, 16.set nb100_gid, 24.set nb100_pos, 32.set nb100_faction, 40.set nb100_charge, 48.set nb100_p_facel, 56.set nb100_argkrf, 64.set nb100_argcrf, 72.set nb100_Vc, 80.set nb100_type, 88.set nb100_p_ntype, 96.set nb100_vdwparam, 104.set nb100_Vvdw, 112.set nb100_p_tabscale, 120.set nb100_VFtab, 128.set nb100_invsqrta, 136.set nb100_dvda, 144.set nb100_p_gbtabscale, 152.set nb100_GBtab, 160.set nb100_p_nthreads, 168.set nb100_count, 176.set nb100_mtx, 184.set nb100_outeriter, 192.set nb100_inneriter, 200.set nb100_work, 208 ## facel, krf,crf, tabscale, gbtabscale passed in xmm regs. ## stack offsets for local variables ## bottom of stack is cache-aligned for sse 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_innerjjnr, 208.set nb100_iinr, 216.set nb100_jindex, 224.set nb100_jjnr, 232.set nb100_shift, 240.set nb100_shiftvec, 248.set nb100_facel, 256.set nb100_is3, 264.set nb100_ii3, 268.set nb100_innerk, 272.set nb100_n, 276.set nb100_nn1, 280.set nb100_nouter, 284.set nb100_ninner, 288.set nb100_nri, 292 push %rbp movq %rsp,%rbp push %rbx push %r12 push %r13 push %r14 push %r15 emms subq $312,%rsp # # local variable stack space (n*16+8) ## zero 32-bit iteration counters movl $0,%eax movl %eax,nb100_nouter(%rsp) movl %eax,nb100_ninner(%rsp) movl (%rdi),%edi movl %edi,nb100_nri(%rsp) movq %rsi,nb100_iinr(%rsp) movq %rdx,nb100_jindex(%rsp) movq %rcx,nb100_jjnr(%rsp) movq %r8,nb100_shift(%rsp) movq %r9,nb100_shiftvec(%rsp) movq nb100_p_facel(%rbp),%rsi movss (%rsi),%xmm0 movss %xmm0,nb100_facel(%rsp) ## create constant floating-point factors on stack movl $0x3f000000,%eax ## half in IEEE (hex) movl %eax,nb100_half(%rsp) movss nb100_half(%rsp),%xmm1 shufps $0,%xmm1,%xmm1 ## splat to all elements movaps %xmm1,%xmm2 addps %xmm2,%xmm2 ## one movaps %xmm2,%xmm3 addps %xmm2,%xmm2 ## two addps %xmm2,%xmm3 ## three movaps %xmm1,nb100_half(%rsp) movaps %xmm3,nb100_three(%rsp)_nb_kernel100_x86_64_sse.nb100_threadloop: movq nb100_count(%rbp),%rsi ## pointer to sync counter movl (%rsi),%eax_nb_kernel100_x86_64_sse.nb100_spinlock: movl %eax,%ebx ## ebx=*count=nn0 addl $1,%ebx ## ebx=nn1=nn0+10 lock cmpxchgl %ebx,(%rsi) ## write nn1 to *counter, ## if it hasnt changed. ## or reread *counter to eax. pause ## -> better p4 performance jnz _nb_kernel100_x86_64_sse.nb100_spinlock ## if(nn1>nri) nn1=nri movl nb100_nri(%rsp),%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(%rsp) movl %ebx,nb100_nn1(%rsp) subl %eax,%ebx ## calc number of outer lists movl %eax,%esi ## copy n to esi jg _nb_kernel100_x86_64_sse.nb100_outerstart jmp _nb_kernel100_x86_64_sse.nb100_end_nb_kernel100_x86_64_sse.nb100_outerstart: ## ebx contains number of outer iterations addl nb100_nouter(%rsp),%ebx movl %ebx,nb100_nouter(%rsp)_nb_kernel100_x86_64_sse.nb100_outer: movq nb100_shift(%rsp),%rax ## rax = pointer into shift[] movl (%rax,%rsi,4),%ebx ## ebx=shift[n] lea (%rbx,%rbx,2),%rbx ## rbx=3*is movl %ebx,nb100_is3(%rsp) ## store is3 movq nb100_shiftvec(%rsp),%rax ## eax = base of shiftvec[] movss (%rax,%rbx,4),%xmm10 movss 4(%rax,%rbx,4),%xmm11 movss 8(%rax,%rbx,4),%xmm12 movq nb100_iinr(%rsp),%rcx ## rcx = pointer into iinr[] movl (%rcx,%rsi,4),%ebx ## ebx =ii movq nb100_charge(%rbp),%rdx movss (%rdx,%rbx,4),%xmm3 mulss nb100_facel(%rsp),%xmm3 shufps $0,%xmm3,%xmm3 lea (%rbx,%rbx,2),%rbx ## rbx = 3*ii=ii3 movq nb100_pos(%rbp),%rax ## rax = base of pos[] addss (%rax,%rbx,4),%xmm10 addss 4(%rax,%rbx,4),%xmm11 addss 8(%rax,%rbx,4),%xmm12 movaps %xmm3,nb100_iq(%rsp) shufps $0,%xmm10,%xmm10 shufps $0,%xmm11,%xmm11 shufps $0,%xmm12,%xmm12 movaps %xmm10,nb100_ix(%rsp) movaps %xmm11,nb100_iy(%rsp) movaps %xmm12,nb100_iz(%rsp) movl %ebx,nb100_ii3(%rsp) ## clear vctot (xmm12) and i forces (xmm13-xmm15) xorps %xmm12,%xmm12 movaps %xmm12,%xmm13 movaps %xmm12,%xmm14 movaps %xmm12,%xmm15 movq nb100_jindex(%rsp),%rax movl (%rax,%rsi,4),%ecx ## jindex[n] movl 4(%rax,%rsi,4),%edx ## jindex[n+1] subl %ecx,%edx ## number of innerloop atoms movq nb100_jjnr(%rsp),%rax shll $2,%ecx addq %rcx,%rax movq %rax,nb100_innerjjnr(%rsp) ## pointer to jjnr[nj0] movl %edx,%ecx subl $4,%edx addl nb100_ninner(%rsp),%ecx movl %ecx,nb100_ninner(%rsp) addl $0,%edx ## to check sign movl %edx,nb100_innerk(%rsp) ## number of innerloop atoms jge _nb_kernel100_x86_64_sse.nb100_unroll_loop jmp _nb_kernel100_x86_64_sse.nb100_finish_inner_nb_kernel100_x86_64_sse.nb100_unroll_loop: ## quad-unrolled innerloop here movq nb100_innerjjnr(%rsp),%rdx ## pointer to jjnr[k] movl (%rdx),%eax movl 4(%rdx),%ebx movl 8(%rdx),%ecx movl 12(%rdx),%edx ## eax-edx=jnr1-4 addq $16,nb100_innerjjnr(%rsp) ## advance pointer (unrolled 4) lea (%rax,%rax,2),%r8 ## j3 lea (%rbx,%rbx,2),%r9 lea (%rcx,%rcx,2),%r10 lea (%rdx,%rdx,2),%r11 movq nb100_pos(%rbp),%rdi ## load coordinates movlps (%rdi,%r8,4),%xmm1 ## x1 y1 - - movlps (%rdi,%r9,4),%xmm2 ## x2 y2 - - movlps (%rdi,%r10,4),%xmm3 ## x3 y3 - - movlps (%rdi,%r11,4),%xmm4 ## x4 y4 - - movss 8(%rdi,%r8,4),%xmm5 ## z1 - - - movss 8(%rdi,%r9,4),%xmm6 ## z2 - - - movss 8(%rdi,%r10,4),%xmm7 ## z3 - - - movss 8(%rdi,%r11,4),%xmm8 ## z4 - - - unpcklps %xmm3,%xmm1 ## x1 x3 y1 y3 unpcklps %xmm4,%xmm2 ## x2 x4 y2 y4 unpcklps %xmm7,%xmm5 ## z1 z3 - - unpcklps %xmm8,%xmm6 ## z2 z4 - - movaps %xmm1,%xmm3 movq nb100_charge(%rbp),%rsi unpcklps %xmm2,%xmm1 ## x1 x2 x3 x4 unpckhps %xmm2,%xmm3 ## y1 y2 y3 y4 unpcklps %xmm6,%xmm5 ## z1 z2 z3 z4 movss (%rsi,%rax,4),%xmm0 movss (%rsi,%rcx,4),%xmm2 movss (%rsi,%rbx,4),%xmm7 movss (%rsi,%rdx,4),%xmm8 ## calc dr subps nb100_ix(%rsp),%xmm1 subps nb100_iy(%rsp),%xmm3 subps nb100_iz(%rsp),%xmm5 ## store dr in xmm9-xmm11 movaps %xmm1,%xmm9 movaps %xmm3,%xmm10 movaps %xmm5,%xmm11 ## square it mulps %xmm1,%xmm1 mulps %xmm3,%xmm3 mulps %xmm5,%xmm5 addps %xmm3,%xmm1 addps %xmm5,%xmm1 ## rsq in xmm1 unpcklps %xmm2,%xmm0 ## jqa jqc - - unpcklps %xmm8,%xmm7 ## jqb jqd - - ## calculate rinv=1/sqrt(rsq) rsqrtps %xmm1,%xmm5 movaps %xmm5,%xmm2 mulps %xmm5,%xmm5 unpcklps %xmm7,%xmm0 ## jqa jqb jqc jqd movaps nb100_three(%rsp),%xmm4 mulps %xmm1,%xmm5 ## rsq*lu*lu subps %xmm5,%xmm4 ## 30-rsq*lu*lu mulps %xmm2,%xmm4 mulps nb100_iq(%rsp),%xmm0 mulps nb100_half(%rsp),%xmm4 movaps %xmm4,%xmm1 mulps %xmm4,%xmm4 ## xmm1=rinv ## xmm4=rinvsq ## calculate coulomb interaction, xmm0=qq mulps %xmm1,%xmm0 ## xmm0=vcoul mulps %xmm0,%xmm4 ## xmm4=fscal ## add potential to vctot (sum in xmm12) addps %xmm0,%xmm12 movq nb100_faction(%rbp),%rsi ## the fj's - start by accumulating x & y forces from memory movlps (%rsi,%r8,4),%xmm0 ## x1 y1 - - movlps (%rsi,%r10,4),%xmm1 ## x3 y3 - - movhps (%rsi,%r9,4),%xmm0 ## x1 y1 x2 y2 movhps (%rsi,%r11,4),%xmm1 ## x3 y3 x4 y4 ## calculate scalar force by multiplying dx/dy/dz with fscal mulps %xmm4,%xmm9 mulps %xmm4,%xmm10 mulps %xmm4,%xmm11 ## xmm0-xmm2 contains tx-tz (partial force) ## accumulate i forces addps %xmm9,%xmm13 addps %xmm10,%xmm14 addps %xmm11,%xmm15 movaps %xmm9,%xmm8 unpcklps %xmm10,%xmm9 ## x1 y1 x2 y2 unpckhps %xmm10,%xmm8 ## x3 y3 x4 y4 ## update fjx and fjy addps %xmm9,%xmm0 addps %xmm8,%xmm1 movlps %xmm0,(%rsi,%r8,4) movlps %xmm1,(%rsi,%r10,4) movhps %xmm0,(%rsi,%r9,4) movhps %xmm1,(%rsi,%r11,4) ## xmm11: fjz1 fjz2 fjz3 fjz4 pshufd $1,%xmm11,%xmm5 ## fjz2 - - - movhlps %xmm11,%xmm4 ## fjz3 - - - pshufd $3,%xmm11,%xmm3 ## fjz4 - - - addss 8(%rsi,%r8,4),%xmm11 addss 8(%rsi,%r9,4),%xmm5 addss 8(%rsi,%r10,4),%xmm4 addss 8(%rsi,%r11,4),%xmm3 movss %xmm11,8(%rsi,%r8,4) movss %xmm5,8(%rsi,%r9,4) movss %xmm4,8(%rsi,%r10,4) movss %xmm3,8(%rsi,%r11,4) ## should we do one more iteration? subl $4,nb100_innerk(%rsp) jl _nb_kernel100_x86_64_sse.nb100_finish_inner jmp _nb_kernel100_x86_64_sse.nb100_unroll_loop_nb_kernel100_x86_64_sse.nb100_finish_inner: ## check if at least two particles remain addl $4,nb100_innerk(%rsp) movl nb100_innerk(%rsp),%edx andl $2,%edx jnz _nb_kernel100_x86_64_sse.nb100_dopair jmp _nb_kernel100_x86_64_sse.nb100_checksingle_nb_kernel100_x86_64_sse.nb100_dopair: ## twice-unrolled innerloop here movq nb100_innerjjnr(%rsp),%rdx ## pointer to jjnr[k] movl (%rdx),%eax movl 4(%rdx),%ebx addq $8,nb100_innerjjnr(%rsp) ## advance pointer (unrolled 2) movq nb100_charge(%rbp),%rsi movss (%rsi,%rax,4),%xmm0⌨️ 快捷键说明
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